release: Zephyr 1.9.2

Signed-off-by: Anas Nashif <anas.nashif@intel.com>

.buildkite/daily.yml

@@ -1,35 +0,0 @@
-steps:
-  - command:
-    - .buildkite/run.sh
-    env:
-      ZEPHYR_TOOLCHAIN_VARIANT: "zephyr"
-      ZEPHYR_SDK_INSTALL_DIR: "/opt/toolchains/zephyr-sdk-0.12.4"
-    parallelism: 400
-    timeout_in_minutes: 210
-    retry:
-      manual: true
-    plugins:
-      - docker#v3.5.0:
-          image: "zephyrprojectrtos/ci:v0.17.1"
-          propagate-environment: true
-          volumes:
-            - "/var/lib/buildkite-agent/git-mirrors:/var/lib/buildkite-agent/git-mirrors"
-            - "/var/lib/buildkite-agent/zephyr-module-cache:/var/lib/buildkite-agent/zephyr-module-cache"
-            - "/var/lib/buildkite-agent/zephyr-ccache:/root/.ccache"
-          workdir: "/workdir/zephyr"
-    agents:
-    - "queue=default"
-
-  - wait: ~
-    continue_on_failure: true
-
-  - plugins:
-      - junit-annotate#v1.7.0:
-          artifacts: twister-*.xml
-
-  - command:
-    - .buildkite/mergejunit.sh
-
-notify:
-  - email: "builds+int+399+7809482394022958124@lists.zephyrproject.org"
-    if: build.state != "passed"

.buildkite/hooks/post-command

@@ -1,8 +0,0 @@
-#!/bin/bash
-# Copyright (c) 2020 Linaro Limited
-#
-# SPDX-License-Identifier: Apache-2.0
-
-# report disk usage:
-echo "--- $0 disk usage"
-df -h

.buildkite/hooks/pre-command

@@ -1,44 +0,0 @@
-#!/bin/bash
-# Copyright (c) 2020 Linaro Limited
-#
-# SPDX-License-Identifier: Apache-2.0
-
-# Save off where we started so we can go back there
-WORKDIR=${PWD}
-
-echo "--- $0 disk usage"
-df -h
-du -hs /var/lib/buildkite-agent/*
-docker images -a
-docker system df -v
-
-if [ -n "${BUILDKITE_PULL_REQUEST_BASE_BRANCH}" ]; then
-   git fetch -v origin ${BUILDKITE_PULL_REQUEST_BASE_BRANCH}
-   git checkout FETCH_HEAD
-   git config --local user.email "builds@zephyrproject.org"
-   git config --local user.name "Zephyr CI"
-   git merge --no-edit "${BUILDKITE_COMMIT}" || {
-       local merge_result=$?
-       echo "Merge failed: ${merge_result}"
-       git merge --abort
-       exit $merge_result
-   }
-fi
-
-mkdir -p /var/lib/buildkite-agent/zephyr-ccache/
-
-# create cache dirs, no-op if they already exist
-mkdir -p /var/lib/buildkite-agent/zephyr-module-cache/modules
-mkdir -p /var/lib/buildkite-agent/zephyr-module-cache/tools
-mkdir -p /var/lib/buildkite-agent/zephyr-module-cache/bootloader
-
-# Clean cache - if it already exists
-cd /var/lib/buildkite-agent/zephyr-module-cache
-find -type f -not -path "*/.git/*" -not -name ".git" -delete
-
-# Remove any stale locks
-find -name index.lock -delete
-
-# return from where we started so we can find pipeline files from
-# git repo
-cd ${WORKDIR}

.buildkite/mergejunit.sh

@@ -1,19 +0,0 @@
-#!/bin/bash
-# Copyright (c) 2021 Linaro Limited
-#
-# SPDX-License-Identifier: Apache-2.0
-set -eE
-
-buildkite-agent artifact download twister-*.xml .
-
-xmls=""
-
-for f in twister-*xml; do [ -s ${f} ] && xmls+="${f} "; done
-
-if [ "${xmls}" ]; then
-   junitparser merge ${xmls} junit.xml
-   buildkite-agent artifact upload junit.xml
-   junit2html junit.xml
-   buildkite-agent artifact upload junit.xml.html
-   buildkite-agent annotate --style "info" "Read the <a href=\"artifact://junit.xml.html\">JUnit test report</a>"
-fi

.buildkite/pipeline.yml

@@ -1,31 +0,0 @@
-steps:
-  - command:
-    - .buildkite/run.sh
-    env:
-      ZEPHYR_TOOLCHAIN_VARIANT: "zephyr"
-      ZEPHYR_SDK_INSTALL_DIR: "/opt/toolchains/zephyr-sdk-0.12.4"
-    parallelism: 40
-    timeout_in_minutes: 180
-    retry:
-      manual: true
-    plugins:
-      - docker#v3.5.0:
-          image: "zephyrprojectrtos/ci:v0.17.1"
-          propagate-environment: true
-          volumes:
-            - "/var/lib/buildkite-agent/git-mirrors:/var/lib/buildkite-agent/git-mirrors"
-            - "/var/lib/buildkite-agent/zephyr-module-cache:/var/lib/buildkite-agent/zephyr-module-cache"
-            - "/var/lib/buildkite-agent/zephyr-ccache:/root/.ccache"
-          workdir: "/workdir/zephyr"
-    agents:
-    - "queue=default"
-
-  - wait: ~
-    continue_on_failure: true
-
-  - plugins:
-      - junit-annotate#v1.7.0:
-          artifacts: twister-*.xml
-
-  - command:
-    - .buildkite/mergejunit.sh

.buildkite/run.sh

@@ -1,78 +0,0 @@
-#!/bin/bash
-# Copyright (c) 2020 Linaro Limited
-#
-# SPDX-License-Identifier: Apache-2.0
-set -eE
-
-function cleanup()
-{
-	# Rename twister junit xml for use with junit-annotate-buildkite-plugin
-	# create dummy file if twister did nothing
-	if [ ! -f twister-out/twister.xml ]; then
-	   touch twister-out/twister.xml
-	fi
-	mv twister-out/twister.xml twister-${BUILDKITE_JOB_ID}.xml
-	buildkite-agent artifact upload twister-${BUILDKITE_JOB_ID}.xml
-
-
-	# Upload test_file to get list of tests that are build/run
-	if [ -f test_file.txt ]; then
-		buildkite-agent artifact upload test_file.txt
-	fi
-
-	# ccache stats
-	echo "--- ccache stats at finish"
-	ccache -s
-
-	# Cleanup on exit
-	rm -fr *
-
-	# disk usage
-	echo "--- disk usage at finish"
-	df -h
-}
-
-trap cleanup ERR
-
-echo "--- run $0"
-
-git log -n 5 --oneline --decorate --abbrev=12
-
-# Setup module cache
-cd /workdir
-ln -s /var/lib/buildkite-agent/zephyr-module-cache/modules
-ln -s /var/lib/buildkite-agent/zephyr-module-cache/tools
-ln -s /var/lib/buildkite-agent/zephyr-module-cache/bootloader
-cd /workdir/zephyr
-
-export JOB_NUM=$((${BUILDKITE_PARALLEL_JOB}+1))
-
-# ccache stats
-echo ""
-echo "--- ccache stats at start"
-ccache -s
-
-
-if [ -n "${DAILY_BUILD}" ]; then
-   TWISTER_OPTIONS=" --inline-logs -N --build-only --all --retry-failed 3 -v "
-   echo "--- DAILY BUILD"
-   west init -l .
-   west update 1> west.update.log || west update 1> west.update-2.log
-   west forall -c 'git reset --hard HEAD'
-   source zephyr-env.sh
-   ./scripts/twister --subset ${JOB_NUM}/${BUILDKITE_PARALLEL_JOB_COUNT} ${TWISTER_OPTIONS}
-else
-   if [ -n "${BUILDKITE_PULL_REQUEST_BASE_BRANCH}" ]; then
-      ./scripts/ci/run_ci.sh  -c -b ${BUILDKITE_PULL_REQUEST_BASE_BRANCH} -r origin \
-	   -m ${JOB_NUM} -M ${BUILDKITE_PARALLEL_JOB_COUNT} -p ${BUILDKITE_PULL_REQUEST}
-   else
-       ./scripts/ci/run_ci.sh -c -b ${BUILDKITE_BRANCH} -r origin \
-	   -m ${JOB_NUM} -M ${BUILDKITE_PARALLEL_JOB_COUNT};
-   fi
-fi
-
-TWISTER_EXIT_STATUS=$?
-
-cleanup
-
-exit ${TWISTER_EXIT_STATUS}

.checkpatch.conf

@@ -1,31 +1,20 @@
+--mailback
+--no-tree
 --emacs
 --summary-file
 --show-types
---max-line-length=100
+--max-line-length=80
 --min-conf-desc-length=1
---typedefsfile=scripts/checkpatch/typedefsfile
 
 --ignore BRACES
 --ignore PRINTK_WITHOUT_KERN_LEVEL
 --ignore SPLIT_STRING
 --ignore VOLATILE
 --ignore CONFIG_EXPERIMENTAL
---ignore PREFER_KERNEL_TYPES
---ignore PREFER_SECTION
 --ignore AVOID_EXTERNS
 --ignore NETWORKING_BLOCK_COMMENT_STYLE
 --ignore DATE_TIME
 --ignore MINMAX
 --ignore CONST_STRUCT
 --ignore FILE_PATH_CHANGES
---ignore SPDX_LICENSE_TAG
---ignore C99_COMMENT_TOLERANCE
---ignore REPEATED_WORD
---ignore UNDOCUMENTED_DT_STRING
---ignore DT_SPLIT_BINDING_PATCH
---ignore DT_SCHEMA_BINDING_PATCH
---ignore TRAILING_SEMICOLON
---ignore COMPLEX_MACRO
---ignore MULTISTATEMENT_MACRO_USE_DO_WHILE
---ignore ENOSYS
 --exclude ext

.clang-format

@@ -1,145 +0,0 @@
-# SPDX-License-Identifier: GPL-2.0
-#
-# clang-format configuration file. Intended for clang-format >= 4.
-#
-# For more information, see:
-#
-#   Documentation/process/clang-format.rst
-#   https://clang.llvm.org/docs/ClangFormat.html
-#   https://clang.llvm.org/docs/ClangFormatStyleOptions.html
-#
----
-AccessModifierOffset: -4
-AlignAfterOpenBracket: Align
-AlignConsecutiveAssignments: false
-AlignConsecutiveDeclarations: false
-#AlignEscapedNewlines: Left # Unknown to clang-format-4.0
-AlignOperands: true
-AlignTrailingComments: false
-AllowAllParametersOfDeclarationOnNextLine: false
-AllowShortBlocksOnASingleLine: false
-AllowShortCaseLabelsOnASingleLine: false
-AllowShortFunctionsOnASingleLine: None
-AllowShortIfStatementsOnASingleLine: false
-AllowShortLoopsOnASingleLine: false
-AlwaysBreakAfterDefinitionReturnType: None
-AlwaysBreakAfterReturnType: None
-AlwaysBreakBeforeMultilineStrings: false
-AlwaysBreakTemplateDeclarations: false
-BinPackArguments: true
-BinPackParameters: true
-BraceWrapping:
-  AfterClass: false
-  AfterControlStatement: false
-  AfterEnum: false
-  AfterFunction: true
-  AfterNamespace: true
-  AfterObjCDeclaration: false
-  AfterStruct: false
-  AfterUnion: false
-  #AfterExternBlock: false # Unknown to clang-format-5.0
-  BeforeCatch: false
-  BeforeElse: false
-  IndentBraces: false
-  #SplitEmptyFunction: true # Unknown to clang-format-4.0
-  #SplitEmptyRecord: true # Unknown to clang-format-4.0
-  #SplitEmptyNamespace: true # Unknown to clang-format-4.0
-BreakBeforeBinaryOperators: None
-BreakBeforeBraces: Custom
-#BreakBeforeInheritanceComma: false # Unknown to clang-format-4.0
-BreakBeforeTernaryOperators: false
-BreakConstructorInitializersBeforeComma: false
-#BreakConstructorInitializers: BeforeComma # Unknown to clang-format-4.0
-BreakAfterJavaFieldAnnotations: false
-BreakStringLiterals: false
-ColumnLimit: 100
-CommentPragmas: '^ IWYU pragma:'
-#CompactNamespaces: false # Unknown to clang-format-4.0
-ConstructorInitializerAllOnOneLineOrOnePerLine: false
-ConstructorInitializerIndentWidth: 8
-ContinuationIndentWidth: 8
-Cpp11BracedListStyle: false
-DerivePointerAlignment: false
-DisableFormat: false
-ExperimentalAutoDetectBinPacking: false
-#FixNamespaceComments: false # Unknown to clang-format-4.0
-
-# Taken from:
-#   git grep -h '^#define [^[:space:]]*FOR_EACH[^[:space:]]*(' include/ \
-#   | sed "s,^#define \([^[:space:]]*FOR_EACH[^[:space:]]*\)(.*$,  - '\1'," \
-#   | sort | uniq
-ForEachMacros:
-  - 'FOR_EACH'
-  - 'FOR_EACH_FIXED_ARG'
-  - 'RB_FOR_EACH'
-  - 'RB_FOR_EACH_CONTAINER'
-  - 'SYS_DLIST_FOR_EACH_CONTAINER'
-  - 'SYS_DLIST_FOR_EACH_CONTAINER_SAFE'
-  - 'SYS_DLIST_FOR_EACH_NODE'
-  - 'SYS_DLIST_FOR_EACH_NODE_SAFE'
-  - 'SYS_SFLIST_FOR_EACH_CONTAINER'
-  - 'SYS_SFLIST_FOR_EACH_CONTAINER_SAFE'
-  - 'SYS_SFLIST_FOR_EACH_NODE'
-  - 'SYS_SFLIST_FOR_EACH_NODE_SAFE'
-  - 'SYS_SLIST_FOR_EACH_CONTAINER'
-  - 'SYS_SLIST_FOR_EACH_CONTAINER_SAFE'
-  - 'SYS_SLIST_FOR_EACH_NODE'
-  - 'SYS_SLIST_FOR_EACH_NODE_SAFE'
-  - 'Z_GENLIST_FOR_EACH_CONTAINER'
-  - 'Z_GENLIST_FOR_EACH_CONTAINER_SAFE'
-  - 'Z_GENLIST_FOR_EACH_NODE'
-  - 'Z_GENLIST_FOR_EACH_NODE_SAFE'
-  - '_WAIT_Q_FOR_EACH'
-
-#IncludeBlocks: Preserve # Unknown to clang-format-5.0
-IncludeCategories:
-  - Regex: '.*'
-    Priority: 1
-IncludeIsMainRegex: '(Test)?$'
-IndentCaseLabels: false
-#IndentPPDirectives: None # Unknown to clang-format-5.0
-IndentWidth: 8
-IndentWrappedFunctionNames: false
-JavaScriptQuotes: Leave
-JavaScriptWrapImports: true
-KeepEmptyLinesAtTheStartOfBlocks: false
-MacroBlockBegin: ''
-MacroBlockEnd: ''
-MaxEmptyLinesToKeep: 1
-NamespaceIndentation: Inner
-#ObjCBinPackProtocolList: Auto # Unknown to clang-format-5.0
-ObjCBlockIndentWidth: 8
-ObjCSpaceAfterProperty: true
-ObjCSpaceBeforeProtocolList: true
-
-# Taken from git's rules
-#PenaltyBreakAssignment: 10 # Unknown to clang-format-4.0
-PenaltyBreakBeforeFirstCallParameter: 30
-PenaltyBreakComment: 10
-PenaltyBreakFirstLessLess: 0
-PenaltyBreakString: 10
-PenaltyExcessCharacter: 100
-PenaltyReturnTypeOnItsOwnLine: 60
-
-PointerAlignment: Right
-ReflowComments: false
-SortIncludes: false
-#SortUsingDeclarations: false # Unknown to clang-format-4.0
-SpaceAfterCStyleCast: false
-SpaceAfterTemplateKeyword: true
-SpaceBeforeAssignmentOperators: true
-#SpaceBeforeCtorInitializerColon: true # Unknown to clang-format-5.0
-#SpaceBeforeInheritanceColon: true # Unknown to clang-format-5.0
-SpaceBeforeParens: ControlStatements
-#SpaceBeforeRangeBasedForLoopColon: true # Unknown to clang-format-5.0
-SpaceInEmptyParentheses: false
-SpacesBeforeTrailingComments: 1
-SpacesInAngles: false
-SpacesInContainerLiterals: false
-SpacesInCStyleCastParentheses: false
-SpacesInParentheses: false
-SpacesInSquareBrackets: false
-Standard: Cpp03
-TabWidth: 8
-UseTab: Always
-...

.codecov.yml

@@ -1,31 +0,0 @@
-codecov:
-  notify:
-    require_ci_to_pass: yes
-
-coverage:
-  precision: 2
-  round: down
-  range: "70...100"
-
-  status:
-    project: yes
-    patch: yes
-    changes: no
-
-#ignore:
-#  - "tests/**/*"
-#  - "samples/**/*"
-#  - "ext/hal/**/*"
-
-parsers:
-  gcov:
-    branch_detection:
-      conditional: yes
-      loop: yes
-      method: no
-      macro: no
-
-comment:
-  layout: "reach, diff, flags, files, footer"
-  behavior: default
-  require_changes: no

.editorconfig

@@ -1,75 +0,0 @@
-# EditorConfig: https://editorconfig.org/
-
-# top-most EditorConfig file
-root = true
-
-# All (Defaults)
-[*]
-charset = utf-8
-end_of_line = lf
-insert_final_newline = true
-trim_trailing_whitespace = true
-max_line_length = 80
-
-# Assembly
-[*.S]
-indent_style = tab
-indent_size = 8
-
-# C
-[*.{c,h}]
-indent_style = tab
-indent_size = 8
-
-# Python
-[*.py]
-indent_style = space
-indent_size = 4
-
-# Perl
-[*.pl]
-indent_style = tab
-indent_size = 8
-
-# YAML
-[*.{yml,yaml}]
-indent_style = space
-indent_size = 2
-
-# Shell Script
-[*.sh]
-indent_style = space
-indent_size = 4
-
-# Windows Command Script
-[*.cmd]
-end_of_line = crlf
-indent_style = tab
-indent_size = 8
-
-# Valgrind Suppression File
-[*.supp]
-indent_style = space
-indent_size = 3
-
-# CMake
-[{CMakeLists.txt,*.cmake}]
-indent_style = space
-indent_size = 2
-
-# Makefile
-[Makefile]
-indent_style = tab
-
-# Device tree
-[*.{dts,dtsi,overlay}]
-indent_style = tab
-indent_size = 8
-
-# Git commit messages
-[COMMIT_EDITMSG]
-max_line_length = 72
-
-# Kconfig
-[Kconfig*]
-indent_style=tab

.gitattributes

@@ -3,7 +3,3 @@
 .gitattributes export-ignore
 .gitignore export-ignore
 .mailmap export-ignore
-
-# Tell linguist that generated test pattern files should not be included in the
-# language statistics.
-*.pat linguist-generated=true

.github/ISSUE_TEMPLATE/bug_report.md

@@ -1,40 +0,0 @@
----
-name: Bug report
-about: Create a report to help us improve Zephyr
-title: ''
-labels: bug
-assignees: ''
-
----
-
-**Describe the bug**
-A clear and concise description of what the bug is.
-What have you tried to diagnose or workaround this issue?
-
-**To Reproduce**
-Steps to reproduce the behavior:
-1. mkdir build; cd build
-2. cmake -DBOARD=board\_xyz
-3. make
-4. See error
-
-**Expected behavior**
-A clear and concise description of what you expected to happen.
-
-**Impact**
-What impact does this issue have on your progress (e.g., annoyance, showstopper)
-
-**Logs and console output**
-If applicable, add console logs or other types of debug information
-e.g Wireshark capture or Logic analyzer capture (upload in zip archive).
-copy-and-paste text and put a code fence (\`\`\`) before and after, to help
-explain the issue. (if unable to obtain text log, add a screenshot)
-
-**Environment (please complete the following information):**
- - OS: (e.g. Linux, MacOS, Windows)
- - Toolchain (e.g Zephyr SDK, ...)
- - Commit SHA or Version used
-
-
-**Additional context**
-Add any other context about the problem here.

.github/ISSUE_TEMPLATE/enhancement.md

@@ -1,20 +0,0 @@
----
-name: Enhancement
-about: Suggest enhancements to existing features
-title: ''
-labels: Enhancement
-assignees: ''
-
----
-
-**Is your enhancement proposal related to a problem? Please describe.**
-A clear and concise description of what the problem is.
-
-**Describe the solution you'd like**
-A clear and concise description of what you want to happen.
-
-**Describe alternatives you've considered**
-A clear and concise description of any alternative solutions or features you've considered.
-
-**Additional context**
-Add any other context or graphics (drag-and-drop an image) about the feature request here.

.github/ISSUE_TEMPLATE/ext-source.md

@@ -1,62 +0,0 @@
----
-name: External Source Code
-about: Submit a proposal to integrate external source code
-title: ''
-labels: TSC
-assignees: ''
-
----
-
-## Origin
-
-Name of project hosting the original open source code
-Provide a link to the source
-
-## Purpose
-
-Brief description of what this software does
-
-## Mode of integration
-
-Describe whether you'd like to integrate this exernal component in the main tree
-or as a module, and why. If the mode of integration is a module, suggest a
-repository name for the module
-
-## Pull Request
-
-Pull request (if any) with the actual implementation of the integration, be it
-in the main tree or as a module (pointing to your own fork for now). Make sure
-the PR is correctly labeled as "DNM"
-
-## Description
-
-Long description that will help reviewers discuss suitability of the
-component to solve the problem at hand (there may be a better options
-available.)
-
-What is its primary functionality (e.g., SQLLite is a lightweight
-database)?
-
-What problem are you trying to solve? (e.g., a state store is
-required to maintain ...)
-
-Why is this the right component to solve it (e.g., SQLite is small,
-easy to use, and has a very liberal license.)
-
-# Dependencies
-
-What other components does this package depend on?
-
-Will the Zephyr project have a direct dependency on the component, or
-will it be included via an abstraction layer with this component as a
-replaceable implementation?
-
-## Revision
-
-Version or SHA you would like to integrate initially
-
-## License
-
-Please use an SPDX identifier (https://spdx.org/licenses/), such as
-``BSD-3-Clause``
-

.github/ISSUE_TEMPLATE/feature_request.md

@@ -1,20 +0,0 @@
----
-name: Feature request
-about: Suggest an idea for this project
-title: ''
-labels: feature request
-assignees: ''
-
----
-
-**Is your feature request related to a problem? Please describe.**
-A clear and concise description of what the problem is.
-
-**Describe the solution you'd like**
-A clear and concise description of what you want to happen.
-
-**Describe alternatives you've considered**
-A clear and concise description of any alternative solutions or features you've considered.
-
-**Additional context**
-Add any other context or graphics (drag-and-drop an image) about the feature request here.

.github/ISSUE_TEMPLATE/hardware_support.md

@@ -1,19 +0,0 @@
----
-name: Hardware Support
-about: Suggest adding hardware support
-title: ''
-labels: Hardware Support
-assignees: ''
-
----
-
-**Is this request related to a missing driver support for a particular hardware platform, SoC or board? Please describe.**
-Describe in details the hardware support being requested and why this support benefits Zephyr.
-
-**Describe why you are asking for this support?**
-Describe why you are asking for this support instead of contributing it directly to the tree
-
-If this is a new board or SoC, please state whether you are willing to maintain the Zephyr support for it if it is included in the main tree
-
-**Additional context**
-Add any other context or graphics (drag-and-drop an image) about the hardware here.

.github/ISSUE_TEMPLATE/rfc-proposal.md

@@ -1,51 +0,0 @@
----
-name: RFC / Proposal
-about: Submit an RFC / Proposal
-title: ''
-labels: RFC
-assignees: ''
-
----
-
-## Introduction
-
-This section targets end users, TSC members, maintainers and anyone else that might
-need a quick explanation of your proposed change.
-
-### Problem description
-
-Why do we want this change and what problem are we trying to address?
-
-### Proposed change
-
-A brief summary of the proposed change - the 10,000 ft view on what it will
-change once this change is implemented.
-
-## Detailed RFC
-
-In this section of the document the target audience is the dev team. Upon
-reading this section each engineer should have a rather clear picture of what
-needs to be done in order to implement the described feature.
-
-### Proposed change (Detailed)
-
-This section is freeform - you should describe your change in as much detail
-as possible. Please also ensure to include any context or background info here.
-For example, do we have existing components which can be reused or altered.
-
-By reading this section, each team member should be able to know what exactly
-you're planning to change and how.
-
-### Dependencies
-
-Highlight how the change may affect the rest of the project (new components,
-modifications in other areas), or other teams/projects.
-
-### Concerns and Unresolved Questions
-
-List any concerns, unknowns, and generally unresolved questions etc.
-
-## Alternatives
-
-List any alternatives considered, and the reasons for choosing this option
-over them.

.github/SECURITY.md

@@ -1,22 +0,0 @@
-# Security Policy
-
-## Supported versions
-
-The Zephyr project supports the following versions with security
-updates:
-
-  - The most recent release, and the release prior to that.
-  - Active LTS releases.
-
-At this time, with the latest release of v2.5.0, the supported
-versions are:
-
-  - 1.14.2: Current LTS
-  - v2.4.0: Prior release
-  - v2.5.0: Current release
-
-## Reporting process
-
-Please see our [Security Vulnerability
-Reporting](https://docs.zephyrproject.org/latest/security/reporting.html)
-page for details on the process.

.github/labeler.yml

@@ -1,163 +0,0 @@
-"Release Notes":
-  - "doc/releases/**/*"
-"area: Modem":
-  - "drivers/modem/**/*"
-"area: PWM":
-  - "drivers/pwm/**/*"
-"area: Watchdog":
-  - "drivers/watchdog/**/*"
-"area: Sensors":
-  - "drivers/sensors/**/*"
-"area: ADC":
-  - "drivers/adc/**/*"
-"area: Counter":
-  - "drivers/counter/**/*"
-"area: CAN":
-  - "include/drivers/can.h"
-  - "include/canbus/*/**"
-  - "drivers/can/**/*"
-  - "subsys/canbus/*/**"
-"area: EEPROM":
-  - "include/drivers/eeprom.h"
-  - "drivers/eeprom/**/*"
-"area: Timer":
-  - "drivers/timer/**/*"
-"area: I2S":
-  - "drivers/i2s/**/*"
-"area: C Library":
-  - "lib/libc/**/*"
-"area: Devicetree":
-  - "dts/**/*"
-  - "**/*.dts"
-  - "**/*.dtsi"
-  - "include/devicetree.h"
-  - "include/devicetree/*"
-  - "doc/guides/dts/**/*"
-"area: Devicetree Binding":
-  - "include/dt-bindings/**/*"
-  - "dts/bindings/**/*"
-"area: Devicetree Tooling":
-  - "scripts/dts/**/*"
-"area: I2C":
-  - "drivers/i2c/**/*"
-"area: SPI":
-  - "drivers/spi/**/*"
-"area: Boards":
-  - "boards/**/*"
-"area: POSIX":
-  - "lib/posix/**/*"
-"area: native port":
-  - "arch/posix/**/*"
-  - "include/arch/posix/**/*"
-  - "soc/posix/**/*"
-  - "**/*native_posix*"
-"area: X86":
-  - "arch/x86/**/*"
-  - "include/arch/x86/**/*"
-"area: ARM":
-  - "arch/arm/**/*"
-  - "include/arch/arm/**/*"
-"area: ARM64":
-  - "arch/arm64/**/*"
-  - "include/arch/arm64/**/*"
-"area: NIOS2":
-  - "arch/nios2/**/*"
-  - "include/arch/nios2/**/*"
-"area: Xtensa":
-  - "arch/xtensa/**/*"
-  - "include/arch/xtensa/**/*"
-"area: RISCv32/64":
-  - "arch/risv/**/*"
-  - "include/arch/riscv/**/*"
-"area: ARC":
-  - "arch/arc/**/*"
-  - "include/arch/arc/**/*"
-"area: Networking":
-  - "subsys/net/**/*"
-  - "samples/net/**/*"
-  - "tests/net/**/*"
-  - "include/net/**/*"
-  - "include/drivers/ieee802154/**/*"
-  - "drivers/ethernet/**/*"
-  - "drivers/ieee802154/**/*"
-  - "drivers/wifi/**/*"
-  - "drivers/ptp_clock/**/*"
-  - "drivers/net/**/*"
-"area: Logging":
-  - "subsys/logging/**/*"
-"area: Shell":
-  - "subsys/shell/**/*"
-"area: Console":
-  - "subsys/console/**/*"
-"area: Test Framework":
-  - "subsys/testsuite/**/*"
-"area: Settings":
-  - "subsys/settings/**/*"
-"area: File System":
-  - "subsys/fs/**/*"
-"area: Storage":
-  - "subsys/storage/**/*"
-"area: Bluetooth":
-  - "subsys/bluetooth/**/*"
-  - "**/*bluetooth*"
-"area: Bluetooth Mesh":
-  - "subsys/bluetooth/mesh/**/*"
-"area: Bluetooth Audio":
-  - "subsys/bluetooth/audio/**/*"
-"area: Bluetooth Controller":
-  - "subsys/bluetooth/controller/**/*"
-"area: Bluetooth Host":
-  - "subsys/bluetooth/host/**/*"
-  - "subsys/bluetooth/services/**/*"
-"area: API":
-  - "include/**/*"
-"area: Samples":
-  - "samples/**/*"
-"area: Tests":
-  - "tests/**/*"
-"area: Kernel":
-  - "kernel/**/*"
-  - "tests/kernel/**/*"
-"area: Documentation":
-  - "**/*.rst"
-  - "**/*.md"
-"area: Build System":
-  - "cmake/**/*"
-  - "CmakeLists.txt"
-"area: Kconfig":
-  - "scripts/kconfig/**/*"
-  - "Kconfig"
-  - "Kconfig.zephyr"
-"area: Twister":
-  - "scripts/twister"
-  - "scripts/pylib/twister/**/*"
-"area: Modules":
-  - "west.yml"
-  - "modules/**/*"
-"area: Shields":
-  - "boards/shields/**"
-  - "samples/shields/**"
-"platform: NXP":
-  - "boards/arm/frdm*/**"
-  - "boards/arm/hexiwear*/**"
-  - "boards/arm/lpcxpresso*/**"
-  - "boards/arm/*imx*/**"
-  - "drivers/**/*imx*"
-  - "drivers/**/*mcux*"
-  - "dts/arm/nxp/*/*"
-  - "dts/bindings/**/nxp*"
-  - "soc/arm/nxp*/**"
-"platform: STM32":
-  - "boards/arm/nucleo_*/**"
-  - "boards/arm/*stm32*/**"
-  - "drivers/**/*stm32*"
-  - "dts/arm/st/*/*"
-  - "include/drivers/*/*stm32*"
-  - "soc/arm/st_stm32/**"
-"platform: SiLabs":
-  - "boards/arm/efr32_*/**/*"
-  - "boards/arm/efm32_*/**/*"
-  - "drivers/**/*gecko*"
-  - "dts/arm/silabs/**/*"
-  - "dts/bindings/**/silabs,gecko*"
-  - "soc/arm/silabs_exx32/**/*"

.github/license_config.yml

@@ -1,16 +0,0 @@
-license:
-  main: apache-2.0
-  report_missing: true
-  category: Permissive
-copyright:
-  check: true
-exclude:
-  extensions:
-    - yml
-    - yaml
-    - html
-    - rst
-    - conf
-    - cfg
-  langs:
-    - HTML

.github/workflows/backport.yml

@@ -1,19 +0,0 @@
-name: Backport
-on:
-  pull_request_target:
-    types:
-      - closed
-      - labeled
-    branches:
-      - master
-
-jobs:
-  backport:
-    runs-on: ubuntu-18.04
-    name: Backport
-    steps:
-      - name: Backport
-        uses: zephyrproject-rtos/action-backport@v1.1.1-1
-        with:
-          github_token: ${{ secrets.ZB_GITHUB_TOKEN }}
-          issue_labels: backport

.github/workflows/bsim.yaml

@@ -1,85 +0,0 @@
-name: Bluetooth Tests
-
-on:
-  pull_request_target:
-    paths:
-      - "west.yml"
-      - "subsys/bluetooth/**"
-      - "tests/bluetooth/bsim_bt/**"
-      - "boards/posix/**"
-      - "soc/posix/**"
-      - "arch/posix/**"
-
-jobs:
-  bsim-build-cancel:
-    runs-on: ubuntu-latest
-    steps:
-      - name: Cancel Previous Runs
-        uses: styfle/cancel-workflow-action@0.6.0
-        with:
-          access_token: ${{ github.token }}
-  bsim-build:
-    runs-on: ubuntu-latest
-    needs: bsim-build-cancel
-    container:
-      image: zephyrprojectrtos/ci:v0.17.1
-      options: '--entrypoint /bin/bash'
-    env:
-      ZEPHYR_TOOLCHAIN_VARIANT: zephyr
-      ZEPHYR_SDK_INSTALL_DIR: /opt/toolchains/zephyr-sdk-0.12.4
-      CLANG_ROOT_DIR: /usr/lib/llvm-12
-      BSIM_OUT_PATH: /opt/bsim/
-      BSIM_COMPONENTS_PATH: /opt/bsim/components
-      EDTT_PATH: ../tools/edtt
-      bsim_bt_test_results_file: ./bsim_bt_out/bsim_results.xml
-    steps:
-      - name: Update PATH for west
-        run: |
-          echo "$HOME/.local/bin" >> $GITHUB_PATH
-
-      - name: checkout
-        uses: actions/checkout@v2
-        with:
-          ref: ${{ github.event.pull_request.head.sha }}
-          fetch-depth: 0
-
-      - name: west setup
-        run: |
-          west init -l . || true
-          west update
-
-      - name: Run Bluetooth Tests with BSIM
-        run: |
-          #source zephyr-env.sh
-          export ZEPHYR_BASE=${PWD}
-          WORK_DIR=${ZEPHYR_BASE}/bsim_bt_out tests/bluetooth/bsim_bt/compile.sh
-          RESULTS_FILE=${ZEPHYR_BASE}/${bsim_bt_test_results_file} \
-          SEARCH_PATH=tests/bluetooth/bsim_bt/ tests/bluetooth/bsim_bt/run_parallel.sh
-
-      - name: Upload Test Results
-        if: always()
-        uses: actions/upload-artifact@v2
-        with:
-          name: Bluetooth Test Results
-          path: ./bsim_bt_out/bsim_results.xml
-
-  publish-test-results:
-    name: "Publish Unit Tests Results"
-    needs: bsim-build
-    runs-on: ubuntu-20.04
-      # the build-and-test job might be skipped, we don't need to run this job then
-    if: success() || failure()
-
-    steps:
-      - name: Download Artifacts
-        uses: actions/download-artifact@v2
-        with:
-          path: artifacts
-
-      - name: Publish Unit Test Results
-        uses: EnricoMi/publish-unit-test-result-action@v1.12
-        with:
-          check_name: Bluetooth Test Results
-          github_token: ${{ secrets.GITHUB_TOKEN }}
-          files: "**/bsim_results.xml"
-          comment_on_pr: false

.github/workflows/clang.yaml

@@ -1,90 +0,0 @@
-name: Build with Clang/LLVM
-
-on: pull_request_target
-
-jobs:
-  clang-build-cancel:
-    runs-on: ubuntu-latest
-    steps:
-      - name: Cancel Previous Runs
-        uses: styfle/cancel-workflow-action@0.6.0
-        with:
-          access_token: ${{ github.token }}
-  clang-build:
-    runs-on: ubuntu-latest
-    needs: clang-build-cancel
-    container:
-      image: zephyrprojectrtos/ci:v0.17.1
-      options: '--entrypoint /bin/bash'
-    strategy:
-      fail-fast: false
-      matrix:
-        subset: [1, 2, 3, 4, 5]
-    env:
-      ZEPHYR_SDK_INSTALL_DIR: /opt/toolchains/zephyr-sdk-0.12.4
-      CLANG_ROOT_DIR: /usr/lib/llvm-12
-      MATRIX_SIZE: 5
-    steps:
-      - name: Cancel Previous Runs
-        uses: styfle/cancel-workflow-action@0.6.0
-        with:
-          access_token: ${{ github.token }}
-      - name: Update PATH for west
-        run: |
-          echo "$HOME/.local/bin" >> $GITHUB_PATH
-
-      - name: checkout
-        uses: actions/checkout@v2
-        with:
-          ref: ${{ github.event.pull_request.head.sha }}
-          fetch-depth: 0
-
-      - name: west setup
-        run: |
-          west init -l . || true
-          west update
-
-      - name: Check Environment
-        run: |
-          cmake --version
-          ${CLANG_ROOT_DIR}/bin/clang --version
-          gcc --version
-          ls -la
-
-      - name: Run Tests with Twister
-        run: |
-          #source zephyr-env.sh
-          export ZEPHYR_BASE=${PWD}
-          export ZEPHYR_TOOLCHAIN_VARIANT=llvm
-          ./scripts/twister --inline-logs -N -v -p native_posix --subset ${{matrix.subset}}/${MATRIX_SIZE} --retry-failed 3
-
-      - name: Upload Unit Test Results
-        if: always()
-        uses: actions/upload-artifact@v2
-        with:
-          name: Unit Test Results (Subset ${{ matrix.subset }})
-          path: twister-out/twister.xml
-
-  publish-test-results:
-    name: "Publish Unit Tests Results"
-    needs: clang-build
-    runs-on: ubuntu-20.04
-      # the build-and-test job might be skipped, we don't need to run this job then
-    if: success() || failure()
-
-    steps:
-      - name: Download Artifacts
-        uses: actions/download-artifact@v2
-        with:
-          path: artifacts
-
-      - name: Display structure of downloaded files
-        run: ls -R
-
-      - name: Publish Unit Test Results
-        uses: EnricoMi/publish-unit-test-result-action@v1.12
-        with:
-          check_name: Unit Test Results
-          github_token: ${{ secrets.GITHUB_TOKEN }}
-          files: "**/twister.xml"
-          comment_on_pr: false

.github/workflows/coding_guidelines.yml

@@ -1,60 +0,0 @@
-name: Coding Guidelines
-
-on: pull_request
-
-jobs:
-  compliance_job:
-    runs-on: ubuntu-latest
-    name: Run coding guidelines checks on patch series (PR)
-    steps:
-    - name: Checkout the code
-      uses: actions/checkout@v2
-      with:
-        ref: ${{ github.event.pull_request.head.sha }}
-        fetch-depth: 0
-
-    - name: cache-pip
-      uses: actions/cache@v1
-      with:
-        path: ~/.cache/pip
-        key: ${{ runner.os }}-doc-pip
-
-    - name: Install python dependencies
-      run: |
-        pip3 install unidiff
-        pip3 install wheel
-        pip3 install sh
-
-    - name: Install Packages
-      run: |
-        sudo apt-get install ocaml-base-nox
-        wget https://launchpad.net/~npalix/+archive/ubuntu/coccinelle/+files/coccinelle_1.0.8~20.04npalix1_amd64.deb
-        sudo dpkg -i coccinelle_1.0.8~20.04npalix1_amd64.deb
-
-    - name: Run Coding Guildeines Checks
-      continue-on-error: true
-      id: coding_guidelines
-      env:
-        BASE_REF: ${{ github.base_ref }}
-      run: |
-        export ZEPHYR_BASE=$PWD
-        git config --global user.email "actions@zephyrproject.org"
-        git config --global user.name "Github Actions"
-        git remote -v
-        git rebase origin/${BASE_REF}
-        source zephyr-env.sh
-        # debug
-        ls -la
-        git log  --pretty=oneline | head -n 10
-        ./scripts/ci/guideline_check.py --output output.txt -c origin/${BASE_REF}..
-
-    - name: check-warns
-      run: |
-        if [[ -s "output.txt" ]]; then
-            errors=$(cat output.txt)
-            errors="${errors//'%'/'%25'}"
-            errors="${errors//$'\n'/'%0A'}"
-            errors="${errors//$'\r'/'%0D'}"
-            echo "::error file=output.txt::$errors"
-            exit 1;
-        fi

.github/workflows/compliance.yml

@@ -1,84 +0,0 @@
-name: Compliance
-
-on: pull_request
-
-jobs:
-  compliance_job:
-    runs-on: ubuntu-latest
-    name: Run compliance checks on patch series (PR)
-    steps:
-    - name: Update PATH for west
-      run: |
-        echo "$HOME/.local/bin" >> $GITHUB_PATH
-
-    - name: Checkout the code
-      uses: actions/checkout@v2
-      with:
-        ref: ${{ github.event.pull_request.head.sha }}
-        fetch-depth: 0
-
-    - name: cache-pip
-      uses: actions/cache@v1
-      with:
-        path: ~/.cache/pip
-        key: ${{ runner.os }}-doc-pip
-
-    - name: Install python dependencies
-      run: |
-        pip3 install setuptools
-        pip3 install wheel
-        pip3 install python-magic junitparser==1.6.3 gitlint pylint pykwalify
-        pip3 install west
-
-    - name: west setup
-      env:
-        BASE_REF: ${{ github.base_ref }}
-      run: |
-        git config --global user.email "you@example.com"
-        git config --global user.name "Your Name"
-        git remote -v
-        git rebase origin/${BASE_REF}
-        # debug
-        git log  --pretty=oneline | head -n 10
-        west init -l . || true
-        west update
-
-    - name: Run Compliance Tests
-      continue-on-error: true
-      id: compliance
-      env:
-        BASE_REF: ${{ github.base_ref }}
-      run: |
-        export ZEPHYR_BASE=$PWD
-        # debug
-        ls -la
-        git log  --pretty=oneline | head -n 10
-        ./scripts/ci/check_compliance.py -m Codeowners -m Devicetree -m Gitlint -m Identity -m Nits -m pylint -m checkpatch -m Kconfig -c origin/${BASE_REF}..
-
-    - name: upload-results
-      uses: actions/upload-artifact@master
-      continue-on-error: True
-      with:
-        name: compliance.xml
-        path: compliance.xml
-
-    - name: check-warns
-      run: |
-        if [[ ! -s "compliance.xml" ]]; then
-          exit 1;
-        fi
-
-        for file in Nits.txt checkpatch.txt Identity.txt Gitlint.txt pylint.txt Devicetree.txt Kconfig.txt Codeowners.txt; do
-          if [[ -s $file ]]; then
-            errors=$(cat $file)
-            errors="${errors//'%'/'%25'}"
-            errors="${errors//$'\n'/'%0A'}"
-            errors="${errors//$'\r'/'%0D'}"
-            echo "::error file=${file}::$errors"
-            exit=1
-          fi
-        done
-
-        if [ ${exit} == 1 ]; then
-          exit 1;
-        fi

.github/workflows/conflict.yml

@@ -1,14 +0,0 @@
-name: Conflict Finder
-
-on:
-  push:
-    branches-ignore:
-      - '**'
-jobs:
-  conflict:
-    runs-on: ubuntu-latest
-    steps:
-      - uses: mschilde/auto-label-merge-conflicts@master
-        with:
-          CONFLICT_LABEL_NAME: "has conflicts"
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

.github/workflows/daily_test_version.yml

@@ -1,38 +0,0 @@
-# Copyright (c) 2020 Intel Corp.
-# SPDX-License-Identifier: Apache-2.0
-
-name: Publish commit for daily testing
-
-on:
-  schedule:
-    - cron:  '50 22 * * *'
-  push:
-    branches:
-      - refs/tags/*
-
-jobs:
-  get_version:
-    runs-on: ubuntu-latest
-    if: github.repository == 'zephyrproject-rtos/zephyr'
-
-    steps:
-    - name: Configure AWS Credentials
-      uses: aws-actions/configure-aws-credentials@v1
-      with:
-        aws-access-key-id: ${{ secrets.AWS_ACCESS_KEY_ID_TESTING }}
-        aws-secret-access-key: ${{ secrets.AWS_SECRET_ACCESS_KEY_TESTING }}
-        aws-region: us-east-1
-
-    - name: install-pip
-      run: |
-        pip3 install gitpython
-
-    - name: checkout
-      uses: actions/checkout@v2
-      with:
-        fetch-depth: 0
-
-    - name: Upload to AWS S3
-      run: |
-        python3 scripts/ci/version_mgr.py --update .
-        aws s3 cp versions.json s3://testing.zephyrproject.org/daily_tests/versions.json

.github/workflows/devicetree_checks.yml

@@ -1,64 +0,0 @@
-# Copyright (c) 2020 Linaro Limited.
-# Copyright (c) 2020 Nordic Semiconductor ASA
-# SPDX-License-Identifier: Apache-2.0
-
-name: Devicetree script tests
-
-on:
-  push:
-    paths:
-    - 'scripts/dts/**'
-    - '.github/workflows/devicetree_checks.yml'
-  pull_request:
-    paths:
-    - 'scripts/dts/**'
-    - '.github/workflows/devicetree_checks.yml'
-
-jobs:
-  devicetree-checks:
-    name: Devicetree script tests
-    runs-on: ${{ matrix.os }}
-    strategy:
-      matrix:
-        python-version: [3.6, 3.7, 3.8]
-        os: [ubuntu-latest, macos-latest, windows-latest]
-    steps:
-    - name: checkout
-      uses: actions/checkout@v2
-    - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v1
-      with:
-        python-version: ${{ matrix.python-version }}
-    - name: cache-pip-linux
-      if: startsWith(runner.os, 'Linux')
-      uses: actions/cache@v1
-      with:
-        path: ~/.cache/pip
-        key: ${{ runner.os }}-pip-${{ matrix.python-version }}
-        restore-keys: |
-          ${{ runner.os }}-pip-${{ matrix.python-version }}
-    - name: cache-pip-mac
-      if: startsWith(runner.os, 'macOS')
-      uses: actions/cache@v1
-      with:
-        path: ~/Library/Caches/pip
-        # Trailing '-' was just to get a different cache name
-        key: ${{ runner.os }}-pip-${{ matrix.python-version }}-
-        restore-keys: |
-          ${{ runner.os }}-pip-${{ matrix.python-version }}-
-    - name: cache-pip-win
-      if: startsWith(runner.os, 'Windows')
-      uses: actions/cache@v1
-      with:
-        path: ~\AppData\Local\pip\Cache
-        key: ${{ runner.os }}-pip-${{ matrix.python-version }}
-        restore-keys: |
-          ${{ runner.os }}-pip-${{ matrix.python-version }}
-    - name: install python dependencies
-      run: |
-        pip3 install wheel
-        pip3 install pytest pyyaml tox
-    - name: run tox
-      working-directory: scripts/dts/python-devicetree
-      run: |
-        tox

.github/workflows/doc-build.yml

@@ -1,79 +0,0 @@
-# Copyright (c) 2020 Linaro Limited.
-# SPDX-License-Identifier: Apache-2.0
-
-name: Documentation GitHub Workflow
-
-on:
-  pull_request:
-    paths:
-    - 'doc/**'
-    - '**.rst'
-    - 'include/**'
-    - 'kernel/include/kernel_arch_interface.h'
-    - 'lib/libc/**'
-    - 'subsys/testsuite/ztest/include/**'
-    - 'tests/**'
-    - '**/Kconfig*'
-    - 'west.yml'
-    - '.github/workflows/doc-build.yml'
-    - 'scripts/dts/**'
-    - 'scripts/requirements-doc.txt'
-
-jobs:
-  doc-build:
-    name: "Documentation Build"
-    runs-on: ubuntu-latest
-
-    steps:
-    - name: Update PATH for west
-      run: |
-        echo "$HOME/.local/bin" >> $GITHUB_PATH
-
-    - name: checkout
-      uses: actions/checkout@v2
-
-    - name: install-pkgs
-      run: |
-        sudo apt-get install -y ninja-build doxygen
-
-    - name: cache-pip
-      uses: actions/cache@v1
-      with:
-        path: ~/.cache/pip
-        key: ${{ runner.os }}-doc-pip
-
-    - name: install-pip
-      run: |
-        sudo pip3 install -U setuptools wheel pip
-        pip3 install -r scripts/requirements-base.txt
-        pip3 install -r scripts/requirements-doc.txt
-        pip3 install west==0.11.0
-
-    - name: west setup
-      run: |
-        west init -l . || true
-
-    - name: build-docs
-      run: |
-        source zephyr-env.sh
-        make -C doc htmldocs
-        tar cvf htmldocs.tar --directory=./doc/_build html
-
-    - name: upload-build
-      uses: actions/upload-artifact@master
-      continue-on-error: True
-      with:
-        name: htmldocs.tar
-        path: htmldocs.tar
-
-    - name: check-warns
-      run: |
-        if [ -s doc/_build/doc.warnings ]; then
-           docwarn=$(cat doc/_build/doc.warnings)
-           docwarn="${docwarn//'%'/'%25'}"
-           docwarn="${docwarn//$'\n'/'%0A'}"
-           docwarn="${docwarn//$'\r'/'%0D'}"
-           # We treat doc warnings as errors
-           echo "::error file=doc.warnings::$docwarn"
-           exit 1
-        fi

.github/workflows/doc-publish.yml

@@ -1,118 +0,0 @@
-# Copyright (c) 2020 Linaro Limited.
-# SPDX-License-Identifier: Apache-2.0
-
-name: Doc build for Release or Daily
-
-# Either a daily based on schedule/cron or only on tag push
-on:
-  schedule:
-    - cron:  '50 22 * * *'
-  push:
-    paths:
-      - 'VERSION'
-    tags:
-      # only publish v* tags, do not care about zephyr-v* which point to the
-      # same commit
-      - 'v*'
-
-jobs:
-  doc-publish:
-    name: Publish Documentation
-    runs-on: ubuntu-latest
-    if: github.repository == 'zephyrproject-rtos/zephyr'
-
-    steps:
-    - name: Update PATH for west
-      run: |
-        echo "$HOME/.local/bin" >> $GITHUB_PATH
-
-    - name: Determine tag
-      id: tag
-      run: |
-        # We expect to get here either due to a schedule event in which
-        # case we are doing a daily build of the docs, or because a new
-        # tag was pushed, in which case we are building docs for a release
-        if [ ${GITHUB_EVENT_NAME} == "schedule" ]; then
-           echo ::set-output name=TYPE::daily;
-           echo ::set-output name=RELEASE::latest;
-        elif [ ${GITHUB_EVENT_NAME} == "push" ]; then
-           # If push due to a tag GITHUB_REF will look like refs/tags/TAG-FOO
-           # chop of 'refs/tags' so RELEASE=TAG-FOO
-           echo ::set-output name=TYPE::release;
-           echo ::set-output name=RELEASE::${GITHUB_REF/refs\/tags\//};
-        else
-           exit 1
-        fi
-
-    - name: Configure AWS Credentials
-      uses: aws-actions/configure-aws-credentials@v1
-      with:
-        aws-access-key-id: ${{ secrets.AWS_ACCESS_KEY_ID }}
-        aws-secret-access-key: ${{ secrets.AWS_SECRET_ACCESS_KEY }}
-        aws-region: us-east-1
-
-    - name: checkout
-      uses: actions/checkout@v2
-
-    - name: install-pkgs
-      run: |
-        sudo apt-get install -y ninja-build doxygen
-
-    - name: cache-pip
-      uses: actions/cache@v1
-      with:
-        path: ~/.cache/pip
-        key: ${{ runner.os }}-doc-pip
-
-    - name: install-pip
-      run: |
-        sudo pip3 install -U setuptools wheel pip
-        pip3 install -r scripts/requirements-base.txt
-        pip3 install -r scripts/requirements-doc.txt
-
-    - name: west setup
-      run: |
-        west init -l . || true
-
-    - name: build-docs
-      env:
-        DOC_TAG: ${{ steps.tag.outputs.TYPE }}
-      run: |
-        source zephyr-env.sh
-        make DOC_TAG=${DOC_TAG} -C doc htmldocs
-
-    - name: check-warns
-      run: |
-        if [ -s doc/_build/doc.warnings ]; then
-           docwarn=$(cat doc/_build/doc.warnings)
-           docwarn="${docwarn//'%'/'%25'}"
-           docwarn="${docwarn//$'\n'/'%0A'}"
-           docwarn="${docwarn//$'\r'/'%0D'}"
-           # We treat doc warnings as errors
-           echo "::error file=doc.warnings::$docwarn"
-           exit 1
-        fi
-
-    - name: Upload to AWS S3
-      env:
-        RELEASE: ${{ steps.tag.outputs.RELEASE }}
-      run: |
-        echo "DOC_RELEASE=[$RELEASE]"
-        if [ "$RELEASE" == "latest" ]; then
-           export
-           echo "publish latest docs"
-           aws s3 sync  --quiet doc/_build/html s3://docs.zephyrproject.org/latest --delete
-           echo "success sync of latest docs"
-        else
-           # we want just the version, without the leading 'v'
-           DOC_RELEASE=${RELEASE:1}
-           echo "publish release docs: ${DOC_RELEASE}"
-           aws s3 sync  --quiet doc/_build/html s3://docs.zephyrproject.org/${DOC_RELEASE}
-           echo "success sync of rel docs"
-        fi
-        if [ -d doc/_build/doxygen/html ]; then
-           API_RELEASE=${RELEASE:1}
-           echo "publish doxygen to apidoc/${API_RELEASE}"
-           aws s3 sync  --quiet doc/_build/doxygen/html s3://docs.zephyrproject.org/apidoc/${API_RELEASE} --delete
-           echo "success publish of doxygen"
-        fi

.github/workflows/issue_count.yml

@@ -1,53 +0,0 @@
-name: Issue Tracker
-
-on:
-  schedule:
-    - cron:  '*/10 * * * *'
-
-env:
-  OUTPUT_FILE_NAME: IssuesReport.md
-  COMMITTER_EMAIL: actions@github.com
-  COMMITTER_NAME: github-actions
-  COMMITTER_USERNAME: github-actions
-
-
-jobs:
-  track-issues:
-    name: "Collect Issue Stats"
-    runs-on: ubuntu-latest
-    if: github.repository == 'zephyrproject-rtos/zephyr'
-
-    steps:
-    - name: Download configuration file
-      run: |
-        wget -q https://raw.githubusercontent.com/$GITHUB_REPOSITORY/master/.github/workflows/issues-report-config.json
-
-    - name: install-packages
-      run: |
-        sudo apt-get install discount
-
-    - uses: brcrista/summarize-issues@v3
-      with:
-        title: 'Issues Report for ${{ github.repository }}'
-        configPath: 'issues-report-config.json'
-        outputPath: ${{ env.OUTPUT_FILE_NAME }}
-        token: ${{ secrets.GITHUB_TOKEN }}
-
-    - name: upload-stats
-      uses: actions/upload-artifact@master
-      continue-on-error: True
-      with:
-        name: ${{ env.OUTPUT_FILE_NAME }}
-        path: ${{ env.OUTPUT_FILE_NAME }}
-
-    - name: Configure AWS Credentials
-      uses: aws-actions/configure-aws-credentials@v1
-      with:
-        aws-access-key-id: ${{ secrets.AWS_ACCESS_KEY_ID_TESTING }}
-        aws-secret-access-key: ${{ secrets.AWS_SECRET_ACCESS_KEY_TESTING }}
-        aws-region: us-east-1
-
-    - name: Post Results
-      run: |
-        mkd2html IssuesReport.md IssuesReport.html
-        aws s3 cp --quiet IssuesReport.html s3://testing.zephyrproject.org/issues/$GITHUB_REPOSITORY/index.html

.github/workflows/issues-report-config.json

@@ -1,37 +0,0 @@
-[
-  {
-    "section": "High Priority Bugs",
-    "labels": ["bug", "priority: high"],
-    "threshold": 0
-  },
-  {
-    "section": "Medium Priority Bugs",
-    "labels": ["bug", "priority: medium"],
-    "threshold": 20
-  },
-  {
-    "section": "Low Priority Bugs",
-    "labels": ["bug", "priority: low"],
-    "threshold": 100
-  },
-  {
-    "section": "Enhancements",
-    "labels": ["Enhancement"],
-    "threshold": 500
-  },
-  {
-    "section": "Features",
-    "labels": ["Feature"],
-    "threshold": 100
-  },
-  {
-    "section": "Questions",
-    "labels": ["question"],
-    "threshold": 100
-  },
-  {
-    "section": "Static Analysis",
-    "labels": ["Coverity"],
-    "threshold": 100
-  }
-]

.github/workflows/labeler.yml

@@ -1,12 +0,0 @@
-name: 'Pull Request Labeler'
-on:
-  - pull_request_target
-
-jobs:
-  labeler:
-    name: Pull Request Labeler
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/labeler@v2.1.1
-        with:
-          repo-token: '${{ secrets.GITHUB_TOKEN }}'

.github/workflows/license_check.yml

@@ -1,32 +0,0 @@
-name: Scancode
-
-on: [pull_request]
-
-jobs:
-  scancode_job:
-    runs-on: ubuntu-latest
-    name: Scan code for licenses
-    steps:
-    - name: Checkout the code
-      uses: actions/checkout@v1
-    - name: Scan the code
-      id: scancode
-      uses: zephyrproject-rtos/action_scancode@v3
-      with:
-        directory-to-scan: 'scan/'
-    - name: Artifact Upload
-      uses: actions/upload-artifact@v1
-      with:
-        name: scancode
-        path: ./artifacts
-
-    - name: Verify
-      run: |
-        if [ -s ./artifacts/report.txt ]; then
-          report=$(cat ./artifacts/report.txt)
-          report="${report//'%'/'%25'}"
-          report="${report//$'\n'/'%0A'}"
-          report="${report//$'\r'/'%0D'}"
-          echo "::error file=./artifacts/report.txt::$report"
-          exit 1
-        fi

.github/workflows/manifest.yml

@@ -1,28 +0,0 @@
-name: Manifest
-on:
-  pull_request_target:
-    paths:
-      - 'west.yml'
-
-jobs:
-  contribs:
-    runs-on: ubuntu-latest
-    name: Manifest
-    steps:
-      - name: Checkout the code
-        uses: actions/checkout@v2
-        with:
-          path: zephyrproject/zephyr
-          ref: ${{ github.event.pull_request.head.sha }}
-          fetch-depth: 0
-
-      - name: Manifest
-        uses: zephyrproject-rtos/action-manifest@v1.1.0
-        with:
-          github-token: ${{ secrets.GITHUB_TOKEN }}
-          manifest-path: 'west.yml'
-          checkout-path: 'zephyrproject/zephyr'
-          label-prefix: 'manifest-'
-          verbosity-level: '1'
-          labels: 'manifest, west'
-          dnm-labels: 'DNM'

.github/workflows/release.yml

@@ -1,61 +0,0 @@
-name: Create a Release
-
-on:
-  push:
-    tags:
-      - 'v*'
-
-jobs:
-  release:
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v2
-        with:
-          fetch-depth: 0
-
-      - name: Get the version
-        id: get_version
-        run: echo ::set-output name=VERSION::${GITHUB_REF#refs/tags/}
-
-      - name: REUSE Compliance Check
-        uses: fsfe/reuse-action@v1
-        with:
-          args: spdx -o zephyr-${{ steps.get_version.outputs.VERSION }}.spdx
-
-      - name: upload-results
-        uses: actions/upload-artifact@master
-        continue-on-error: True
-        with:
-          name: zephyr-${{ steps.get_version.outputs.VERSION }}.spdx
-          path: zephyr-${{ steps.get_version.outputs.VERSION }}.spdx
-
-      - name: Get Diff since last tag
-        run: |
-          oldtag=$(git describe --abbrev=0 ${{ github.ref }}^)
-          echo "Changes since ${oldtag}:" > release-notes.txt
-          echo "" >> release-notes.txt
-          echo "" >> release-notes.txt
-          git shortlog ${oldtag}..${{ github.ref }} >> release-notes.txt
-
-      - name: Create Release
-        id: create_release
-        uses: actions/create-release@v1
-        env:
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-        with:
-          tag_name: ${{ github.ref }}
-          release_name: Zephyr ${{ github.ref }}
-          body_path: release-notes.txt
-          draft: true
-          prerelease: true
-
-      - name: Upload Release Assets
-        id: upload-release-asset
-        uses: actions/upload-release-asset@v1
-        env:
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-        with:
-          upload_url: ${{ steps.create_release.outputs.upload_url }}
-          asset_path: zephyr-${{ steps.get_version.outputs.VERSION }}.spdx
-          asset_name: zephyr-${{ steps.get_version.outputs.VERSION }}.spdx
-          asset_content_type: text/plain

.github/workflows/stale_issue.yml

@@ -1,23 +0,0 @@
-name: "Close stale pull requests/issues"
-on:
-  schedule:
-  - cron: "16 00 * * *"
-
-jobs:
-  stale:
-    name: Find Stale issues and PRs
-    runs-on: ubuntu-latest
-    if: github.repository == 'zephyrproject-rtos/zephyr'
-    steps:
-    - uses: actions/stale@v3
-      with:
-        repo-token: ${{ secrets.GITHUB_TOKEN }}
-        stale-pr-message: 'This pull request has been marked as stale because it has been open (more than) 60 days with no activity. Remove the stale label or add a comment saying that you would like to have the label removed otherwise this pull request will automatically be closed in 14 days. Note, that you can always re-open a closed pull request at any time.'
-        stale-issue-message: 'This issue has been marked as stale because it has been open (more than) 60 days with no activity. Remove the stale label or add a comment saying that you would like to have the label removed otherwise this issue will automatically be closed in 14 days. Note, that you can always re-open a closed issue at any time.'
-        days-before-stale: 60
-        days-before-close: 14
-        stale-issue-label: 'Stale'
-        stale-pr-label: 'Stale'
-        exempt-pr-labels: 'Blocked,In progress'
-        exempt-issue-labels: 'In progress,Enhancement,Feature,Feature Request,RFC,Meta'
-        operations-per-run: 400

.github/workflows/twister_tests.yml

@@ -1,52 +0,0 @@
-# Copyright (c) 2020 Intel Corporation.
-# SPDX-License-Identifier: Apache-2.0
-
-name: Twister TestSuite
-
-on:
-  push:
-    paths:
-    - 'scripts/pylib/twister/**'
-    - 'scripts/twister'
-    - 'scripts/tests/twister/**'
-    - '.github/workflows/twister_tests.yml'
-  pull_request:
-    paths:
-    - 'scripts/pylib/twister/**'
-    - 'scripts/twister'
-    - 'scripts/tests/twister/**'
-    - '.github/workflows/twister_tests.yml'
-
-jobs:
-  twister-tests:
-    name: Twister Unit Tests
-    runs-on: ${{ matrix.os }}
-    strategy:
-      matrix:
-        python-version: [3.6, 3.7, 3.8]
-        os: [ubuntu-latest]
-    steps:
-    - name: checkout
-      uses: actions/checkout@v2
-    - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v1
-      with:
-        python-version: ${{ matrix.python-version }}
-    - name: cache-pip-linux
-      if: startsWith(runner.os, 'Linux')
-      uses: actions/cache@v1
-      with:
-        path: ~/.cache/pip
-        key: ${{ runner.os }}-pip-${{ matrix.python-version }}
-        restore-keys: |
-          ${{ runner.os }}-pip-${{ matrix.python-version }}
-    - name: install-packages
-      run: |
-        pip3 install pytest colorama pyyaml ply mock
-    - name: Run pytest
-      env:
-        ZEPHYR_BASE: ./
-        ZEPHYR_TOOLCHAIN_VARIANT: zephyr
-      run: |
-        echo "Run twister tests"
-        PYTHONPATH=./scripts/tests pytest ./scripts/tests/twister

.github/workflows/west_cmds.yml

@@ -1,69 +0,0 @@
-# Copyright (c) 2020 Linaro Limited.
-# SPDX-License-Identifier: Apache-2.0
-
-name: Zephyr West Command Tests
-
-on:
-  push:
-    paths:
-    - 'scripts/west-commands.yml'
-    - 'scripts/west_commands/**'
-    - '.github/workflows/west_cmds.yml'
-  pull_request:
-    paths:
-    - 'scripts/west-commands.yml'
-    - 'scripts/west_commands/**'
-    - '.github/workflows/west_cmds.yml'
-
-jobs:
-  west-commnads:
-    name: West Command Tests
-    runs-on: ${{ matrix.os }}
-    strategy:
-      matrix:
-        python-version: [3.6, 3.7, 3.8]
-        os: [ubuntu-latest, macos-latest, windows-latest]
-    steps:
-    - name: checkout
-      uses: actions/checkout@v2
-    - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v1
-      with:
-        python-version: ${{ matrix.python-version }}
-    - name: cache-pip-linux
-      if: startsWith(runner.os, 'Linux')
-      uses: actions/cache@v1
-      with:
-        path: ~/.cache/pip
-        key: ${{ runner.os }}-pip-${{ matrix.python-version }}
-        restore-keys: |
-          ${{ runner.os }}-pip-${{ matrix.python-version }}
-    - name: cache-pip-mac
-      if: startsWith(runner.os, 'macOS')
-      uses: actions/cache@v1
-      with:
-        path: ~/Library/Caches/pip
-        # Trailing '-' was just to get a different cache name
-        key: ${{ runner.os }}-pip-${{ matrix.python-version }}-
-        restore-keys: |
-          ${{ runner.os }}-pip-${{ matrix.python-version }}-
-    - name: cache-pip-win
-      if: startsWith(runner.os, 'Windows')
-      uses: actions/cache@v1
-      with:
-        path: ~\AppData\Local\pip\Cache
-        key: ${{ runner.os }}-pip-${{ matrix.python-version }}
-        restore-keys: |
-          ${{ runner.os }}-pip-${{ matrix.python-version }}
-    - name: install pytest
-      run: |
-        pip3 install wheel
-        pip3 install pytest west pyelftools canopen progress mypy intelhex psutil
-    - name: run pytest-win
-      if: runner.os == 'Windows'
-      run: |
-        python ./scripts/west_commands/run_tests.py
-    - name: run pytest-mac-linux
-      if: runner.os != 'Windows'
-      run: |
-        ./scripts/west_commands/run_tests.py

.gitignore

@@ -7,22 +7,17 @@
 *.swp
 *.swo
 *~
-build*/
-!doc/guides/build
-!tests/drivers/build_all
 cscope.*
 .dir
-
-/*.patch
-
-# The .cache directory will be used to cache toolchain capabilities if
-# no suitable out-of-tree directory is found.
-.cache
-
 outdir
 outdir-*
 scripts/basic/fixdep
 scripts/gen_idt/gen_idt
+scripts/kconfig/conf
+scripts/kconfig/mconf
+scripts/kconfig/zconf.hash.c
+scripts/kconfig/zconf.lex.c
+scripts/kconfig/zconf.tab.c
 doc/_build
 doc/doxygen
 doc/xml
@@ -31,25 +26,12 @@ doc/boards
 doc/samples
 doc/latex
 doc/themes/zephyr-docs-theme
-sanity-out*
-twister-out*
-bsim_bt_out
+sanity-out/
 scripts/grub
-doc/reference/kconfig/*.rst
-doc/doc.warnings
-.*project
-.settings
-.envrc
-.vscode
-hide-defaults-note
-venv
-.venv
-
-# Tag files
-GPATH
-GRTAGS
-GTAGS
-TAGS
+doc/reference/kconfig/CONFIG_*
+doc/reference/kconfig/index.rst
 tags
-
-.idea
+.project
+.cproject
+.xxproject
+.envrc

.gitlint

@@ -1,6 +1,6 @@
 # All these sections are optional, edit this file as you like.
 [general]
-ignore=title-trailing-punctuation, T3, title-max-length, T1, body-hard-tab, B3, B1
+ignore=title-trailing-punctuation, T3, title-max-length, T1
 # verbosity should be a value between 1 and 3, the commandline -v flags take precedence over this
 verbosity = 3
 # By default gitlint will ignore merge commits. Set to 'false' to disable.
@@ -13,22 +13,19 @@ debug = false
 extra-path=scripts/gitlint
 
 [title-max-length-no-revert]
-line-length=75
-
-[body-min-line-count]
-min-line-count=1
+line-length=72
 
 [body-max-line-count]
 max-line-count=200
 
 [title-starts-with-subsystem]
-regex = ^(?!subsys:)(([^:]+):)(\s([^:]+):)*\s(.+)$
+regex = ^(([^:]+):)(\s([^:]+):)*\s(.+)$
 
 [title-must-not-contain-word]
 # Comma-separated list of words that should not occur in the title. Matching is case
 # insensitive. It's fine if the keyword occurs as part of a larger word (so "WIPING"
 # will not cause a violation, but "WIP: my title" will.
-words=wip
+words=wip,title
 
 [title-match-regex]
 # python like regex (https://docs.python.org/2/library/re.html) that the

.known-issues/README

@@ -0,0 +1,55 @@
+This directory contains configuration files to ignore errors found in
+the build and test process which are known to the developers and for
+now can be safely ignored.
+
+To use:
+
+ $ cd zephyr
+ $ make SOMETHING >& result
+ $ scripts/filter-known-issues.py result
+
+It is included in the source tree so if anyone has to submit anything
+that triggers some kind of error that is a false positive, it can
+include the "ignore me" file, properly documented.
+
+Each file can contain one or more multiline Python regular expressions
+(https://docs.python.org/2/library/re.html#regular-expression-syntax)
+that match an error message. Multiple regular expressions are
+separated by comment blocks (that start with #). Note that an empty
+line still is considered part of the multiline regular expression.
+
+For example
+
+---beginning---
+#
+# This testcase always fails, pending fix ZEP-1234
+#
+.*/tests/kernel/grumpy .* FAIL
+#
+# Documentation issue, masks:
+#
+# /home/e/inaky/z/kernel.git/doc/api/io_interfaces.rst:28: WARNING: Invalid definition: Expected identifier in nested name. [error at 19]
+#  struct dev_config::@65  dev_config::bits
+#  -------------------^
+#
+^(?P<filename>.+/doc/api/io_interfaces.rst):(?P<lineno>[0-9]+): WARNING: Invalid definition: Expected identifier in nested name. \[error at [0-9]+]
+^\s+struct dev_config::@[0-9]+  dev_config::bits.*
+^\s+-+\^
+---end---
+
+Note you want to:
+
+- use relateive paths; instead of
+  /home/me/mydir/zephyr/something/somewhere.c you will want
+  ^.*/something/somewhere.c (as they will depend on where it is being
+  built)
+
+- Replace line numbers with [0-9]+, as they will change
+
+- (?P<filename>[-._/\w]+/something/somewhere.c) saves the match on
+  that file path in a "variable" called 'filename' that later you can
+  match with (?P=filename) if you want to match multiple lines of the
+  same error message.
+
+Can get really twisted and interesting in terms of regexps; they are
+powerful, so start small :)

.known-issues/doc/bluetooth.conf

@@ -0,0 +1,42 @@
+#
+# Bluetooth unnamed struct definition
+#
+# FIXME: all these should match the relative filename
+#
+^(?P<filename>[-._/\w]+/doc/api/bluetooth.rst):(?P<lineno>[0-9]+): WARNING: Invalid definition: Expected identifier in nested name. \[error at [0-9]+]$
+^[ \t]*$
+^[ \t]*\^$
+^(?P=filename):(?P=lineno): WARNING: Invalid definition: Expected identifier in nested name. \[error at [0-9]+]$
+^[ \t]*$
+^[ \t]*\^$
+^(?P=filename):(?P=lineno): WARNING: Invalid definition: Expected end of definition. \[error at [0-9]+]$
+^.*bt_conn_info.__unnamed__.*$
+^[- \t]*\^$
+#
+# bt_gatt_discover_params unnamed struct definition
+#
+^(?P<filename>[-._/\w]+/doc/api/bluetooth.rst):(?P<lineno>[0-9]+): WARNING: Invalid definition: Expected identifier in nested name. \[error at [0-9]+]
+^[ \t]*
+^[ \t]*\^
+^(?P=filename):(?P=lineno): WARNING: Invalid definition: Expected identifier in nested name. \[error at [0-9]+]
+^[ \t]*
+^[ \t]*\^
+^(?P=filename):(?P=lineno): WARNING: Invalid definition: Expected end of definition. \[error at [0-9]+]
+^.*bt_gatt_discover_params.__unnamed__.*
+^[- \t]*\^
+#
+# Bluetooth GATT unnamed struct definition
+#
+^(?P<filename>[-._/\w]+/doc/api/bluetooth.rst):(?P<lineno>[0-9]+): WARNING: Invalid definition: Expected identifier in nested name. \[error at [0-9]+]
+^[ \t]*
+^[ \t]*\^
+^(?P=filename):(?P=lineno): WARNING: Invalid definition: Expected identifier in nested name. \[error at [0-9]+]
+^[ \t]*
+^[ \t]*\^
+^(?P=filename):(?P=lineno): WARNING: Invalid definition: Expected end of definition. \[error at [0-9]+]
+^.*bt_gatt_read_params.__unnamed__.*
+^[- \t]*\^
+#
+# Bluetooth packed
+#
+^(?P<filename>[-._/\w]+/doc/api/bluetooth.rst):(?P<lineno>[0-9]+): WARNING: cpp:typeOrConcept targets a member \(__packed\).$

.known-issues/doc/header_footer.conf

@@ -0,0 +1,18 @@
+#
+# KERNELVERSION not being defined in local builds, kill that warning,
+# can ignore it
+#
+^.*/Kconfig.zephyr:[0-9]+: warning: The symbol KERNELVERSION references the non-existent environment variable KERNELVERSION.*
+#
+# Documentation generation, early message
+#
+^cd .* && doxygen doc/doxygen.config
+^srctree=.* SRCARCH=\w+ python scripts/genrest/genrest.py .*$
+# This cuts the sphinx build line; has to be separate because in the
+# middle, we have removed the KERNELVERSION one and a full regex won't match
+^sphinx-build -t \w+ -b html .*
+#
+# Documentation generation, footer message
+#
+^[ \t]*
+^Build finished. The HTML pages are in [-._/\w]+

.known-issues/doc/kernel.conf

@@ -0,0 +1,14 @@
+#
+# Kernel unnamed struct definition
+#
+# FIXME: all these should match the relative filename
+#
+^(?P<filename>[-._/\w]+/doc/api/kernel_api.rst):(?P<lineno>[0-9]+): WARNING: Invalid definition: Expected identifier in nested name. \[error at [0-9]+]$
+^[ \t]*$
+^[ \t]*\^$
+^(?P=filename):(?P=lineno): WARNING: Invalid definition: Expected identifier in nested name. \[error at [0-9]+]$
+^[ \t]*$
+^[ \t]*\^$
+^(?P=filename):(?P=lineno): WARNING: Invalid definition: Expected end of definition. \[error at [0-9]+]$
+^.*k_msg.extra.*$
+^[- \t]*\^$

.known-issues/doc/networking.conf

@@ -0,0 +1,113 @@
+#
+# Networking
+#
+#
+# include/net/net_ip.h warnings
+#
+^(?P<filename>[-._/\w]+/doc/api/networking.rst):(?P<lineno>[0-9]+): WARNING: Invalid definition: Expected identifier in nested name. \[error at [0-9]+]
+^[ \t]*
+^[ \t]*\^
+^(?P=filename):(?P=lineno): WARNING: Invalid definition: Expected identifier in nested name. \[error at [0-9]+]
+^[ \t]*
+^[ \t]*\^
+^(?P=filename):(?P=lineno): WARNING: Invalid definition: Expected identifier in nested name. \[error at [0-9]+]
+^[ \t]*
+^[ \t]*\^
+^(?P=filename):(?P=lineno): WARNING: Invalid definition: Expected end of definition. \[error at [0-9]+]
+^.*in[_6]+addr.in[46]_u
+^[- \t]*\^
+#
+# include/net/net_if.h warnings
+#
+^(?P<filename>[-._/\w]+/doc/api/networking.rst):(?P<lineno>[0-9]+): WARNING: Error when parsing function declaration.
+^\If the function has no return type:
+^[ \t]*Error in declarator or parameters and qualifiers
+^[ \t]*Invalid definition: Expected identifier in nested name, got keyword: struct \[error at [0-9]+]
+^.*struct net_if __aligned\(32\)
+^[- \t]*\^
+^\If the function has a return type:
+^[ \t]*Error in declarator or parameters and qualifiers
+^[ \t]*If pointer to member declarator:
+^[ \t]*Invalid definition: Expected \'::\' in pointer to member \(function\). \[error at [0-9]+]
+^.*struct net_if __aligned\(32\)
+^[- \t]*\^
+^[ \t]*If declarator-id:
+^[ \t]*Invalid definition: Expected identifier in nested name. \[error at [0-9]+]
+^.*struct net_if __aligned\(32\)
+^[- \t]*\^
+#
+# include/net/net_mgmt.h
+#
+^(?P<filename>[-._/\w]+/doc/api/networking.rst):(?P<lineno>[0-9]+): WARNING: Invalid definition: Expected identifier in nested name. \[error at [0-9]+]
+^[ \t]*
+^[ \t]*\^
+^(?P=filename):(?P=lineno): WARNING: Invalid definition: Expected identifier in nested name. \[error at [0-9]+]
+^[ \t]*
+^[ \t]*\^
+^(?P=filename):(?P=lineno): WARNING: Invalid definition: Expected end of definition. \[error at [0-9]+]
+^.*net_mgmt_event_callback.__unnamed__
+^[- \t]*\^
+#
+# include/net/buf.h
+#
+^(?P<filename>[-._/\w]+/doc/api/networking.rst):(?P<lineno>[0-9]+): WARNING: Invalid definition: Expected identifier in nested name. \[error at [0-9]+]
+^[ \t]*
+^[ \t]*\^
+^(?P=filename):(?P=lineno): WARNING: Invalid definition: Expected identifier in nested name. \[error at [0-9]+]
+^[ \t]*
+^[ \t]*\^
+^(?P=filename):(?P=lineno): WARNING: Invalid definition: Expected end of definition. \[error at [0-9]+]
+^.*net_buf.__unnamed__
+^[- \t]*\^
+#
+# include/net/ieee802154.h
+#
+^(?P<filename>[-._/\w]+/doc/api/networking.rst):(?P<lineno>[0-9]+): WARNING: Invalid definition: Expected identifier in nested name. \[error at [0-9]+]
+^[ \t]*
+^[ \t]*\^
+^(?P=filename):(?P=lineno): WARNING: Invalid definition: Expected identifier in nested name. \[error at [0-9]+]
+^[ \t]*
+^[ \t]*\^
+^(?P=filename):(?P=lineno): WARNING: Invalid definition: Expected end of definition. \[error at [0-9]+]
+^.*ieee802154_req_params.__unnamed__
+^[- \t]*\^
+#
+# Various warning about net_mgmt declarations
+#
+^(?P<filename>[-._/\w]+/doc/api/networking.rst):(?P<lineno>[0-9]+): WARNING: Error when parsing function declaration\.
+^If the function has no return type\:
+^[ \t]*Error in declarator or parameters and qualifiers
+^[ \t]*Invalid definition: Expected identifier in nested name\. \[error at [0-9]+\]
+^[ \t]*NET_MGMT_DEFINE_.*?$
+^[- \t]*\^
+#
+^If the function has a return type\:
+^[ \t]*Error in declarator
+^[ \t]*If pointer to member declarator:
+^[ \t]*Invalid definition: Expected identifier in nested name\. \[error at [0-9]+\]
+^[ \t]*NET_MGMT_DEFINE_.*?$
+^[- \t]*\^
+#
+^[ \t]*If declId, parameters, and qualifiers\:
+^[ \t]*Invalid definition: Expected identifier in nested name\. \[error at [0-9]+\]
+^[ \t]*NET_MGMT_DEFINE_.*?$
+^[- \t]*\^
+#
+^[ \t]*If parenthesis in noptr-declarator\:
+^[ \t]*Error in declarator
+^[ \t]*If pointer to member declarator:
+^[ \t]*Invalid definition: Expected identifier in nested name\. \[error at [0-9]+\]
+^[ \t]*NET_MGMT_DEFINE_.*?$
+^[- \t]*\^
+#
+^[ \t]*If parenthesis in noptr-declarator\:
+^[ \t]*Error in declarator or parameters and qualifiers
+^[ \t]*If pointer to member declarator:
+^[ \t]*Invalid definition: Expected \'\:\:\' in pointer to member \(function\)\. \[error at [0-9]+\]
+^[ \t]*NET_MGMT_DEFINE_.*?$
+^[- \t]*\^
+#
+^[ \t]*If declarator-id:
+^[ \t]*Invalid definition: Expecting \"\(\" in parameters_and_qualifiers\. \[error at [0-9]+\]
+^[ \t]*NET_MGMT_DEFINE_.*?$
+^[- \t]*\^

.known-issues/doc/sensor.conf

@@ -0,0 +1,12 @@
+#
+# Sensor value unnamed struct definition
+#
+^(?P<filename>[-._/\w]+/doc/api/io_interfaces.rst):(?P<lineno>[0-9]+): WARNING: Invalid definition: Expected identifier in nested name. \[error at [0-9]+]
+^[ \t]*
+^[ \t]*\^
+^(?P=filename):(?P=lineno): WARNING: Invalid definition: Expected identifier in nested name. \[error at [0-9]+]
+^[ \t]*
+^[ \t]*\^
+^(?P=filename):(?P=lineno): WARNING: Invalid definition: Expected end of definition. \[error at [0-9]+]
+^.*sensor_value.__unnamed__.*
+^[- \t]*\^

.known-issues/doc/uart.conf

@@ -0,0 +1,15 @@
+#
+# UART unnamed struct definition
+#
+^(?P<filename>[-._/\w]+/doc/api/io_interfaces.rst):(?P<lineno>[0-9]+): WARNING: Invalid definition: Expected identifier in nested name. \[error at [0-9]+]
+^[ \t]*
+^[ \t]*\^
+^(?P=filename):(?P=lineno): WARNING: Invalid definition: Expected identifier in nested name. \[error at [0-9]+]
+^[ \t]*
+^[ \t]*\^
+^(?P=filename):(?P=lineno): WARNING: Invalid definition: Expected identifier in nested name. \[error at [0-9]+]
+^[ \t]*
+^[ \t]*\^
+^(?P=filename):(?P=lineno): WARNING: Invalid definition: Expected end of definition. \[error at [0-9]+]
+^.*uart_device_config.__unnamed__.*
+^[- \t]*\^

.known-issues/make.conf

@@ -0,0 +1,6 @@
+#
+# When filtering output of the build process, ignore lines that don't
+# provide any information that helps the invoker tell if there was an
+# error.
+#
+^make: (Entering|Leaving) directory .*

.known-issues/testcases/block.conf

@@ -0,0 +1,11 @@
+#
+# When executing test cases, ignore the following messages as they are
+# not to be considered hard errors.
+#
+# Block line when test case cannot run in the HW due to server or connection issues
+#
+^BLCK0/[-a-z0-9:]+	(.+)#test @[^/]+/[^:]+:[^:]+: evaluation blocked(.*)$
+#
+# Block line when there is an issue with the YKUSH serial connection
+#
+^BLCK0/[-a-z0-9:]+	(.+)#test @[^/]+/(?P<board>[^:]+):[^:]+: exception: 400: (?P=board): Cannot find YKUSH serial '[A-Z0-9]+'$

.known-issues/testcases/makefile.conf

@@ -0,0 +1,18 @@
+#
+# When executing test cases under TCF, ignore the following messages
+# as they are not to be considered hard errors.
+#
+# TCF is run under make for taking advantage of the jobserver; when
+# the testcase execution fail, make will complain, which we can
+# ignore ('sommersault' was the old name of the target).
+#
+^/tmp/tcf-[a-zA-Z0-9]+.mk:[0-9]+: recipe for target ('tcf-jobserver-run'|'sommersault') failed$
+#
+# More of the same
+#
+^make: \*\*\* \[(tcf-jobserver-run|sommersault)\] Error 1$
+#
+# TCF's summary line. We don't need to consider it to determine if the
+# run failed or passed.
+#
+^[A-Z]+0/\S+:\s+\S+\s+@\S+: [0-9]+ tests \([0-9]+ passed, [0-9]+ failed, [0-9]+ blocked, [0-9]+ skipped\).*$

.known-issues/testcases/skip.conf

@@ -0,0 +1,4 @@
+#
+# Skip line when test case is eliminated due to filters
+#
+^SKIP0/\S+\s+\S+: No targets can be used \(all [0-9]+ selected from [0-9]+ available eliminated by testcase filtering\)$

.mailmap

@@ -19,14 +19,3 @@ Naga Raja Rao Tulasi <tulasi.r@tcs.com> <tulasi.r@tcs.com>
 Felipe Neves <ryukokki.felipe@gmail.com> <ryukokki.felipe@gmail.com>
 Amir Kaplan <amir.kaplan@intel.com> <amir.kaplan@intel.com>
 Anas Nashif <anas.nashif@intel.com> <anas.nashif@intel.com>
-Ruud Derwig <Ruud.Derwig@synopsys.com> <Ruud.Derwig@synopsys.com>
-Flavio Arieta Netto <flavio@exati.com.br>
-Nishikant Nayak <nishikantax.nayak@intel.com>
-Justin Watson <jwatson5@gmail.com>
-Johann Fischer <j.fischer@phytec.de>
-Jun Li <jun.r.li@intel.com>
-Xiaorui Hu <xiaorui.hu@linaro.org>
-Yannis Damigos <giannis.damigos@gmail.com> <ydamigos@iccs.gr>
-Vinayak Kariappa Chettimada <vinayak.kariappa.chettimada@nordicsemi.no> <vinayak.kariappa.chettimada@nordicsemi.no> <vich@nordicsemi.no> <vinayak.kariappa@gmail.com>
-Sean Nyekjaer <sean@geanix.com> <sean.nyekjaer@prevas.dk>
-Sean Nyekjaer <sean@geanix.com> <sean@nyekjaer.dk>

.shippable.yml

@@ -0,0 +1,132 @@
+language: c
+
+compiler: gcc
+
+env:
+    global:
+        - SDK=0.9.1
+        - SANITYCHECK_OPTIONS=" --inline-logs -R"
+        - SANITYCHECK_OPTIONS_RETRY="${SANITYCHECK_OPTIONS} --only-failed --outdir=out-2nd-pass"
+        - ZEPHYR_SDK_INSTALL_DIR=/opt/sdk/zephyr-sdk-0.9.1
+        - ZEPHYR_GCC_VARIANT=zephyr
+        - USE_CCACHE=1
+        - MATRIX_BUILDS="2"
+        - MATRIX_BUILDS_EXTRA="3"
+    matrix:
+        - MATRIX_BUILD="1"
+        - MATRIX_BUILD="2"
+        - MATRIX_BUILD="3"
+
+build:
+    cache: true
+    cache_dir_list:
+        - ${SHIPPABLE_BUILD_DIR}/ccache
+    pre_ci_boot:
+        image_name: zephyrprojectrtos/ci
+        image_tag: v0.1
+        pull: true
+        options: "-e HOME=/home/buildslave --privileged=true --tty --net=bridge --user buildslave"
+
+    ci:
+      - export CCACHE_DIR=${SHIPPABLE_BUILD_DIR}/ccache/.ccache
+      - >
+        if [ "$IS_PULL_REQUEST" = "true" ]; then
+          git rebase origin/${PULL_REQUEST_BASE_BRANCH};
+        fi
+      - source zephyr-env.sh
+      - ccache -c -s --max-size=2000M
+      - make host-tools
+      - export PREBUILT_HOST_TOOLS=${ZEPHYR_BASE}/bin
+      - >
+          if [ "$MATRIX_BUILD" = "3" -a "$IS_PULL_REQUEST" = "true" ]; then
+            export COMMIT_RANGE=origin/${PULL_REQUEST_BASE_BRANCH}..HEAD
+            echo "Building a Pull Request";
+            echo "- Building Documentation";
+            echo "Commit range:" ${COMMIT_RANGE}
+            make htmldocs > doc.log 2>&1;
+            ./scripts/filter-known-issues.py --config-dir .known-issues/doc/ doc.log > doc.warnings;
+
+            if [ "$?" != 0 ]; then
+              echo " ==> Error running filter script"
+              exit 1
+            fi;
+            if [ -s doc.warnings ]; then
+              echo " => New documentation warnings/errors";
+            fi;
+            echo "- Verify commit message and coding style";
+            ./scripts/ci/check-compliance.py --commits ${COMMIT_RANGE} || true;
+          fi;
+      - >
+          if [ "$IS_PULL_REQUEST" = "true" ]; then
+            ./scripts/ci/get_modified_tests.py --commits origin/${PULL_REQUEST_BASE_BRANCH}..HEAD > modified_tests.args;
+            ./scripts/ci/get_modified_boards.py --commits origin/${PULL_REQUEST_BASE_BRANCH}..HEAD > modified_boards.args;
+
+            if [ -s modified_boards.args ]; then
+              ./scripts/sanitycheck --subset ${MATRIX_BUILD}/${MATRIX_BUILDS_EXTRA} +modified_boards.args || ./scripts/sanitycheck +modified_boards.args --only-failed;
+              cp ./scripts/sanity_chk/last_sanity.xml modified_boards.xml;
+            fi;
+            if [ -s modified_tests.args ]; then
+              ./scripts/sanitycheck --subset ${MATRIX_BUILD}/${MATRIX_BUILDS_EXTRA} +modified_tests.args || ./scripts/sanitycheck +modified_tests.args --only-failed;
+              cp ./scripts/sanity_chk/last_sanity.xml modified_tests.xml;
+            fi;
+            rm -f modified_tests.args modified_boards.args;
+          fi
+      - >
+          if [ "$MATRIX_BUILD" != "3" ]; then
+             ./scripts/sanitycheck ${PLATFORMS} --subset ${MATRIX_BUILD}/${MATRIX_BUILDS} ${COVERAGE} ${SANITYCHECK_OPTIONS} || ./scripts/sanitycheck ${PLATFORMS} ${COVERAGE} ${SANITYCHECK_OPTIONS_RETRY} || ./scripts/sanitycheck ${PLATFORMS} ${COVERAGE} ${SANITYCHECK_OPTIONS_RETRY}
+          fi;
+      - ccache -s
+    on_failure:
+      - rm -rf sanity-out out-2nd-pass
+      - mkdir -p shippable/testresults
+      - >
+          if [ -e compliance.xml ]; then
+            cp compliance.xml shippable/testresults/;
+          fi;
+      - >
+          if [ -e ./scripts/sanity_chk/last_sanity.xml ]; then
+            cp ./scripts/sanity_chk/last_sanity.xml shippable/testresults/;
+          fi;
+      - >
+          if [ -e ./modified_tests.xml ]; then
+            cp ./modified_tests.xml shippable/testresults/;
+          fi;
+    on_success:
+      - rm -rf sanity-out out-2nd-pass
+      - mkdir -p shippable/testresults
+      - >
+          if [ -e compliance.xml ]; then
+            cp compliance.xml shippable/testresults/;
+          fi;
+      - >
+          if [ -e ./scripts/sanity_chk/last_sanity.xml ]; then
+            cp ./scripts/sanity_chk/last_sanity.xml shippable/testresults/;
+          fi;
+      - >
+          if [ -e ./modified_tests.xml ]; then
+            cp ./modified_tests.xml shippable/testresults/;
+          fi;
+
+integrations:
+  notifications:
+    - integrationName: slack_integration
+      type: slack
+      recipients:
+        - "#ci"
+      branches:
+        only:
+          - master
+      on_success: never
+      on_failure: always
+    - integrationName: email
+      type: email
+      recipients:
+        - builds@zephyrproject.org
+      branches:
+        only:
+          - master
+          - net
+          - bluetooth
+          - arm
+      on_success: never
+      on_failure: never

.uncrustify.cfg

@@ -1,80 +0,0 @@
-indent_with_tabs    = 2     # 1=indent to level only, 2=indent with tabs
-input_tab_size      = 8     # original tab size
-output_tab_size     = 8     # new tab size
-indent_columns      = output_tab_size
-indent_label        = 1     # pos: absolute col, neg: relative column
-indent_switch_case  = 0     # number
-
-#
-# inter-symbol newlines
-#
-
-nl_enum_brace       = remove    # "enum {" vs "enum \n {"
-nl_union_brace      = remove    # "union {" vs "union \n {"
-nl_struct_brace     = remove    # "struct {" vs "struct \n {"
-nl_do_brace         = remove    # "do {" vs "do \n {"
-nl_if_brace         = remove    # "if () {" vs "if () \n {"
-nl_for_brace        = remove    # "for () {" vs "for () \n {"
-nl_else_brace       = remove    # "else {" vs "else \n {"
-nl_while_brace      = remove    # "while () {" vs "while () \n {"
-nl_switch_brace     = remove    # "switch () {" vs "switch () \n {"
-nl_brace_while      = remove    # "} while" vs "} \n while" - cuddle while
-nl_brace_else       = remove    # "} \n else" vs "} else"
-nl_func_var_def_blk = 1
-nl_fcall_brace      = remove    # "list_for_each() {" vs "list_for_each()\n{"
-nl_fdef_brace       = add       # "int foo() {" vs "int foo()\n{"
-
-#
-# Source code modifications
-#
-
-mod_paren_on_return = ignore    # "return 1;" vs "return (1);"
-mod_full_brace_if   = add       # "if() { } else { }" vs "if() else"
-
-#
-# inter-character spacing options
-#
-
-sp_sizeof_paren     = remove    # "sizeof (int)" vs "sizeof(int)"
-sp_before_sparen    = force     # "if (" vs "if("
-sp_after_sparen     = force     # "if () {" vs "if (){"
-sp_inside_braces    = add       # "{ 1 }" vs "{1}"
-sp_inside_braces_struct = add   # "{ 1 }" vs "{1}"
-sp_inside_braces_enum   = add   # "{ 1 }" vs "{1}"
-sp_assign           = add
-sp_arith            = add
-sp_bool             = add
-sp_compare          = add
-sp_assign           = add
-sp_after_comma      = add
-sp_func_def_paren   = remove    # "int foo (){" vs "int foo(){"
-sp_func_call_paren  = remove    # "foo (" vs "foo("
-sp_func_proto_paren = remove    # "int foo ();" vs "int foo();"
-sp_inside_fparen    = remove    # "func( arg )" vs "func(arg)"
-sp_else_brace       = add       # ignore/add/remove/force
-sp_before_ptr_star  = add       # ignore/add/remove/force
-sp_after_ptr_star   = remove    # ignore/add/remove/force
-sp_between_ptr_star = remove    # ignore/add/remove/force
-sp_inside_paren     = remove    # remove spaces inside parens
-sp_paren_paren      = remove    # remove spaces between nested parens
-sp_inside_sparen    = remove    # remove spaces inside parens for if, while and the like
-sp_brace_else       = add       # ignore/add/remove/force
-sp_before_nl_cont   = ignore
-sp_cmt_cpp_start    = add
-sp_brace_typedef    = add       # }typedefd_name -> } typedefd_name
-
-cmt_sp_after_star_cont          = 1
-#
-# Aligning stuff
-#
-
-align_with_tabs     = FALSE     # use tabs to align
-align_on_tabstop    = TRUE      # align on tabstops
-align_enum_equ_span = 4         # '=' in enum definition
-align_struct_init_span  = 0     # align stuff in a structure init '= { }'
-align_right_cmt_span    = 3
-align_nl_cont	    = TRUE
-
-
-
-sp_pp_concat                              = ignore      # ignore/add/remove/force

CODEOWNERS

@@ -1,670 +1,177 @@
 # CODEOWNERS for autoreview assigning in github
 
-# https://help.github.com/en/articles/about-code-owners#codeowners-syntax
-
-# Order is important; for each modified file, the last matching
-# pattern takes the most precedence.
-# That is, with the last pattern being
-# *.rst                                     @nashif
-# if only .rst files are being modified, only nashif is
-# automatically requested for review, but you can manually
-# add others as needed.
-
 # Do not use wildcard on all source yet
 # *                                        @galak @nashif
 
-/.github/				  @nashif
-/.github/workflows/                       @galak @nashif
-/.buildkite/				  @galak
-/MAINTAINERS.yml                          @ioannisg @MaureenHelm
-/arch/arc/                                @abrodkin @ruuddw @evgeniy-paltsev
-/arch/arm/                                @MaureenHelm @galak @ioannisg
-/arch/arm/core/aarch32/cortex_m/cmse/     @ioannisg
-/arch/arm/include/aarch32/cortex_m/cmse.h @ioannisg
-/arch/arm/core/aarch32/cortex_a_r/        @MaureenHelm @galak @ioannisg @bbolen @stephanosio
-/arch/arm64/                              @carlocaione
-/arch/arm64/core/cortex_r/                @povergoing
-/arch/common/                             @ioannisg @andyross
-/soc/arc/snps_*/                          @abrodkin @ruuddw @evgeniy-paltsev
-/soc/nios2/                               @nashif
-/soc/arm/                                 @MaureenHelm @galak @ioannisg
-/soc/arm/arm/mps2/                        @fvincenzo
-/soc/arm/atmel_sam/common/*_sam4l_*.c     @nandojve
-/soc/arm/atmel_sam/sam3x/                 @ioannisg
-/soc/arm/atmel_sam/sam4e/                 @nandojve
-/soc/arm/atmel_sam/sam4l/                 @nandojve
-/soc/arm/atmel_sam/sam4s/                 @fallrisk
-/soc/arm/atmel_sam/same70/                @nandojve
-/soc/arm/atmel_sam/samv71/                @nandojve
-/soc/arm/cypress/                         @nandojve
-/soc/arm/bcm*/                            @sbranden
-/soc/arm/infineon_xmc/                    @parthitce
-/soc/arm/nxp*/                            @MaureenHelm @mmahadevan108 @dleach02
-/soc/arm/nordic_nrf/                      @ioannisg
-/soc/arm/nuvoton/                         @ssekar15
-/soc/arm/nuvoton_npcx/                    @MulinChao @WealianLiao @ChiHuaL
-/soc/arm/quicklogic_eos_s3/               @kowalewskijan @kgugala
-/soc/arm/silabs_exx32/efm32pg1b/          @rdmeneze
-/soc/arm/silabs_exx32/efr32mg21/          @l-alfred
-/soc/arm/st_stm32/                        @erwango
-/soc/arm/st_stm32/*/power.c               @FRASTM
-/soc/arm/st_stm32/stm32mp1/               @arnopo
-/soc/arm/ti_simplelink/cc13x2_cc26x2/     @bwitherspoon
-/soc/arm/ti_simplelink/cc32xx/            @vanti
-/soc/arm/ti_simplelink/msp432p4xx/        @Mani-Sadhasivam
-/soc/arm/xilinx_zynqmp/                   @stephanosio
-/soc/arm/renesas_rcar/                    @julien-massot
-/soc/xtensa/intel_s1000/                  @sathishkuttan @dcpleung
-/soc/arm64/                               @carlocaione
-/soc/arm64/qemu_cortex_a53/               @carlocaione
-/soc/arm64/bcm_vk/                        @abhishek-brcm
-/soc/arm64/nxp_layerscape/                @JiafeiPan
-/soc/arm64/xenvm/                         @lorc
-/soc/arm64/arm/                           @povergoing
-/soc/arm64/arm/fvp_aemv8a/                @carlocaione
-/arch/x86/                                @jhedberg @nashif @jenmwms @aasthagr
-/arch/nios2/                              @nashif
-/arch/posix/                              @aescolar @daor-oti
-/arch/riscv/                              @kgugala @pgielda
-/soc/posix/                               @aescolar @daor-oti
-/soc/riscv/                               @kgugala @pgielda
-/soc/riscv/openisa*/                      @MaureenHelm
-/soc/x86/                                 @dcpleung @nashif @jenmwms @aasthagr
-/arch/xtensa/                             @dcpleung @andyross @nashif
-/soc/xtensa/                              @dcpleung @andyross @nashif
-/arch/sparc/                              @martin-aberg
-/soc/sparc/                               @martin-aberg
-/boards/arc/                              @abrodkin @ruuddw @evgeniy-paltsev
-/boards/arm/                              @MaureenHelm @galak
-/boards/arm/96b_argonkey/                 @avisconti
-/boards/arm/96b_avenger96/                @Mani-Sadhasivam
-/boards/arm/96b_carbon/                   @idlethread
-/boards/arm/96b_meerkat96/                @Mani-Sadhasivam
-/boards/arm/96b_nitrogen/                 @idlethread
-/boards/arm/96b_neonkey/                  @Mani-Sadhasivam
-/boards/arm/96b_stm32_sensor_mez/         @Mani-Sadhasivam
-/boards/arm/96b_wistrio/                  @Mani-Sadhasivam
-/boards/arm/arduino_due/                  @ioannisg
-/boards/arm/blackpill_f401ce/             @coderkalyan
-/boards/arm/blackpill_f411ce/             @coderkalyan
-/boards/arm/bmd_345_eval/                 @Navin-Sankar
-/boards/arm/cc1352r1_launchxl/            @bwitherspoon
-/boards/arm/cc26x2r1_launchxl/            @bwitherspoon
-/boards/arm/cc3220sf_launchxl/            @vanti
-/boards/arm/cy8*                          @nandojve
-/boards/arm/disco_l475_iot1/              @erwango
-/boards/arm/efm32pg_stk3401a/             @rdmeneze
-/boards/arm/faze/                         @mbittan @simonguinot
-/boards/arm/frdm*/                        @MaureenHelm @mmahadevan108 @dleach02
-/boards/arm/frdm*/doc/                    @MaureenHelm @MeganHansen
-/boards/arm/google_*/                     @jackrosenthal
-/boards/arm/hexiwear*/                    @MaureenHelm @mmahadevan108 @dleach02
-/boards/arm/hexiwear*/doc/                @MaureenHelm @MeganHansen
-/boards/arm/ip_k66f/                      @parthitce @lmajewski
-/boards/arm/lpcxpresso*/                  @MaureenHelm @mmahadevan108 @dleach02
-/boards/arm/lpcxpresso*/doc/              @MaureenHelm @MeganHansen
-/boards/arm/mimx8mm_evk/                  @Mani-Sadhasivam
-/boards/arm/mimxrt*/                      @MaureenHelm @mmahadevan108 @dleach02
-/boards/arm/mimxrt*/doc/                  @MaureenHelm @MeganHansen
-/boards/arm/mps2_an385/                   @fvincenzo
-/boards/arm/msp_exp432p401r_launchxl/     @Mani-Sadhasivam
-/boards/arm/npcx7m6fb_evb/                @MulinChao @WealianLiao @ChiHuaL
-/boards/arm/nrf*/                         @carlescufi @lemrey @ioannisg
-/boards/arm/nucleo*/                      @erwango @ABOSTM @FRASTM
-/boards/arm/nucleo_f401re/                @idlethread
-/boards/arm/nuvoton_pfm_m487/             @ssekar15
-/boards/arm/qemu_cortex_r*/               @stephanosio
-/boards/arm/qemu_cortex_m*/               @ioannisg
-/boards/arm/quick_feather/                @kowalewskijan @kgugala
-/boards/arm/rak4631_nrf52840/             @gpaquet85
-/boards/arm/rak5010_nrf52840/             @gpaquet85
-/boards/arm/ronoth_lodev/                 @NorthernDean
-/boards/arm/xmc45_relax_kit/              @parthitce
-/boards/arm/sam4e_xpro/                   @nandojve
-/boards/arm/sam4l_ek/                     @nandojve
-/boards/arm/sam4s_xplained/               @fallrisk
-/boards/arm/sam_e70_xplained/             @nandojve
-/boards/arm/sam_v71_xult/                 @nandojve
-/boards/arm/v2m_beetle/                   @fvincenzo
-/boards/arm/olimexino_stm32/              @ydamigos
-/boards/arm/sensortile_box/               @avisconti
-/boards/arm/steval_fcu001v1/              @Navin-Sankar
-/boards/arm/stm32l1_disco/                @karlp
-/boards/arm/stm32*_disco/                 @erwango @ABOSTM @FRASTM
-/boards/arm/stm32f3_disco/                @ydamigos
-/boards/arm/stm32*_eval/                  @erwango @ABOSTM @FRASTM
-/boards/arm/rcar_h3ulcb/                  @julien-massot
-/boards/common/                           @mbolivar-nordic
-/boards/deprecated.cmake                  @tejlmand
-/boards/nios2/                            @nashif
-/boards/nios2/altera_max10/               @nashif
-/boards/arm/stm32_min_dev/                @cbsiddharth
-/boards/posix/                            @aescolar @daor-oti
-/boards/posix/nrf52_bsim/                 @aescolar @wopu-ot
-/boards/riscv/                            @kgugala @pgielda
-/boards/riscv/rv32m1_vega/                @MaureenHelm
-/boards/shields/                          @erwango
-/boards/shields/atmel_rf2xx/              @nandojve
-/boards/shields/esp_8266/                 @nandojve
-/boards/shields/inventek_eswifi/          @nandojve
-/boards/x86/                              @dcpleung @nashif @jenmwms @aasthagr
-/boards/xtensa/                           @nashif @dcpleung
-/boards/xtensa/intel_s1000_crb/           @sathishkuttan @dcpleung
-/boards/xtensa/odroid_go/                 @ydamigos
-/boards/sparc/                            @martin-aberg
-/boards/arm64/qemu_cortex_a53/            @carlocaione
-/boards/arm64/bcm958402m2_a72/            @abhishek-brcm
-/boards/arm64/nxp_ls1046ardb/             @JiafeiPan
-/boards/arm64/xenvm/                      @lorc
-/boards/arm64/fvp_baser_aemv8r/           @povergoing
-/boards/arm64/fvp_base_revc_2xaemv8a/     @carlocaione
-# All cmake related files
-/cmake/                                   @tejlmand @nashif
-/cmake/*/arcmwdt/                         @abrodkin @evgeniy-paltsev @tejlmand
-/CMakeLists.txt                           @tejlmand @nashif
-/doc/                                     @dbkinder
-/doc/guides/coccinelle.rst                @himanshujha199640 @JuliaLawall
-/doc/CMakeLists.txt                       @carlescufi
-/doc/_scripts/                            @carlescufi
-/doc/guides/bluetooth/                    @joerchan @jhedberg @Vudentz
-/doc/guides/dts/                          @galak @mbolivar-nordic
-/doc/reference/bluetooth/                 @joerchan @jhedberg @Vudentz
-/doc/reference/devicetree/                @galak @mbolivar-nordic
-/doc/reference/networking/can*            @alexanderwachter
-/doc/security/                            @ceolin @d3zd3z
-/drivers/debug/                           @nashif
-/drivers/*/*sam4l*                        @nandojve
-/drivers/*/*cc13xx_cc26xx*                @bwitherspoon
-/drivers/*/*litex*                        @mateusz-holenko @kgugala @pgielda
-/drivers/*/*mcux*                         @MaureenHelm @mmahadevan108 @dleach02
-/drivers/*/*stm32*                        @erwango @ABOSTM @FRASTM
-/drivers/*/*native_posix*                 @aescolar @daor-oti
-/drivers/*/*lpc11u6x*                     @mbittan @simonguinot
-/drivers/*/*npcx*                         @MulinChao @WealianLiao @ChiHuaL
-/drivers/adc/                             @anangl
-/drivers/adc/adc_stm32.c                  @cybertale
-/drivers/bluetooth/                       @joerchan @jhedberg @Vudentz
-/drivers/cache/                           @carlocaione
-/drivers/can/                             @alexanderwachter
-/drivers/can/*mcp2515*                    @karstenkoenig
-/drivers/clock_control/*nrf*              @nordic-krch
-/drivers/clock_control/*esp32*            @extremegtx
-/drivers/clock_control/*rcar*             @julien-massot
-/drivers/counter/                         @nordic-krch
-/drivers/console/ipm_console.c            @finikorg
-/drivers/console/semihost_console.c       @luozhongyao
-/drivers/counter/counter_cmos.c           @dcpleung
-/drivers/crypto/*nrf_ecb*                 @maciekfabia @anangl
-/drivers/console/*mux*                    @jukkar
-/drivers/display/                         @vanwinkeljan
-/drivers/display/display_framebuf.c       @dcpleung
-/drivers/dac/                             @martinjaeger
-/drivers/dma/*dw*                         @tbursztyka
-/drivers/dma/*sam0*                       @Sizurka
-/drivers/dma/dma_stm32*                   @cybertale @lowlander
-/drivers/dma/*pl330*                      @raveenp
-/drivers/dma/*iproc_pax*                  @raveenp
-/drivers/ec_host_cmd_periph/              @jettr
-/drivers/edac/                            @finikorg
-/drivers/eeprom/                          @henrikbrixandersen
-/drivers/eeprom/eeprom_stm32.c            @KwonTae-young
-/drivers/entropy/*rv32m1*                 @MaureenHelm
-/drivers/entropy/*gecko*                  @chrta
-/drivers/entropy/*litex*                  @mateusz-holenko @kgugala @pgielda
-/drivers/espi/                            @albertofloyd @franciscomunoz @scottwcpg
-/drivers/ethernet/                        @jukkar @tbursztyka @pfalcon
-/drivers/ethernet/*stm32*                 @Nukersson @lochej
-/drivers/ethernet/*w5500*                 @parthitce
-/drivers/flash/                           @nashif @nvlsianpu
-/drivers/flash/*nrf*                      @nvlsianpu
-/drivers/gpio/                            @mnkp
-/drivers/gpio/*ht16k33*                   @henrikbrixandersen
-/drivers/gpio/*lmp90xxx*                  @henrikbrixandersen
-/drivers/gpio/*stm32*                     @erwango
-/drivers/gpio/*eos_s3*                    @wtatarski @kowalewskijan @kgugala
-/drivers/gpio/*rcar*                      @julien-massot
-/drivers/hwinfo/                          @alexanderwachter
-/drivers/i2s/i2s_ll_stm32*                @avisconti
-/drivers/i2c/i2c_common.c                 @sjg20
-/drivers/i2c/i2c_emul.c                   @sjg20
-/drivers/i2c/i2c_ite_it8xxx2.c            @GTLin08
-/drivers/i2c/i2c_shell.c                  @nashif
-/drivers/i2c/Kconfig.i2c_emul             @sjg20
-/drivers/i2c/Kconfig.it8xxx2              @GTLin08
-/drivers/i2c/slave/*eeprom*               @henrikbrixandersen
-/drivers/i2c/Kconfig.test                 @mbolivar-nordic
-/drivers/i2c/i2c_test.c                   @mbolivar-nordic
-/drivers/i2s/*litex*                      @mateusz-holenko @kgugala @pgielda
-/drivers/ieee802154/                      @jukkar @tbursztyka
-/drivers/ieee802154/ieee802154_rf2xx*     @jukkar @tbursztyka @nandojve
-/drivers/ieee802154/ieee802154_cc13xx*    @bwitherspoon @cfriedt
-/drivers/interrupt_controller/            @dcpleung @nashif
-/drivers/interrupt_controller/intc_gic.c  @stephanosio
-/drivers/ipm/ipm_mhu*                     @karl-zh
-/drivers/ipm/Kconfig.nrfx                 @masz-nordic @ioannisg
-/drivers/ipm/Kconfig.nrfx_ipc_channel     @masz-nordic @ioannisg
-/drivers/ipm/ipm_intel_adsp.c             @finikorg
-/drivers/ipm/ipm_cavs_idc*                @dcpleung
-/drivers/ipm/ipm_nrfx_ipc.c               @masz-nordic @ioannisg
-/drivers/ipm/ipm_nrfx_ipc.h               @masz-nordic @ioannisg
-/drivers/ipm/ipm_stm32_ipcc.c             @arnopo
-/drivers/kscan/                           @albertofloyd @franciscomunoz @scottwcpg
-/drivers/led/                             @Mani-Sadhasivam
-/drivers/led_strip/                       @mbolivar-nordic
-/drivers/lora/                            @Mani-Sadhasivam
-/drivers/memc/                            @gmarull
-/drivers/misc/                            @tejlmand
-/drivers/misc/ft8xx/                      @hubertmis
-/drivers/modem/*gsm*                      @jukkar
-/drivers/modem/hl7800.c                   @rerickson1
-/drivers/modem/Kconfig.hl7800             @rerickson1
-/drivers/pcie/                            @dcpleung @nashif @jhedberg
-/drivers/peci/                            @albertofloyd @franciscomunoz @scottwcpg
-/drivers/pinmux/*hsdk*                    @iriszzw
-/drivers/pinmux/*it8xxx2*                 @ite
-/drivers/pm_cpu_ops/                      @carlocaione
-/drivers/ps2/                             @albertofloyd @franciscomunoz @scottwcpg
-/drivers/pwm/*rv32m1*                     @henrikbrixandersen
-/drivers/pwm/*sam0*                       @nzmichaelh
-/drivers/pwm/*stm32*                      @gmarull
-/drivers/pwm/*xlnx*                       @henrikbrixandersen
-/drivers/pwm/pwm_capture.c                @henrikbrixandersen
-/drivers/pwm/pwm_shell.c                  @henrikbrixandersen
-/drivers/pwm/*gecko*                      @sun681
-/drivers/sensor/                          @MaureenHelm
-/drivers/sensor/ams_iAQcore/              @alexanderwachter
-/drivers/sensor/ens210/                   @alexanderwachter
-/drivers/sensor/hts*/                     @avisconti
-/drivers/sensor/lis*/                     @avisconti
-/drivers/sensor/lps*/                     @avisconti
-/drivers/sensor/lsm*/                     @avisconti
-/drivers/sensor/mpr/                      @sven-hm
-/drivers/sensor/st*/                      @avisconti
-/drivers/serial/uart_altera_jtag_hal.c    @nashif
-/drivers/serial/*ns16550*                 @dcpleung @nashif @jenmwms @aasthagr
-/drivers/serial/*nrfx*                    @Mierunski @anangl
-/drivers/serial/uart_liteuart.c           @mateusz-holenko @kgugala @pgielda
-/drivers/serial/Kconfig.mcux_iuart        @Mani-Sadhasivam
-/drivers/serial/uart_mcux_iuart.c         @Mani-Sadhasivam
-/drivers/serial/Kconfig.rtt               @carlescufi @pkral78
-/drivers/serial/uart_rtt.c                @carlescufi @pkral78
-/drivers/serial/Kconfig.xlnx              @wjliang
-/drivers/serial/uart_xlnx_ps.c            @wjliang
-/drivers/serial/uart_xlnx_uartlite.c      @henrikbrixandersen
-/drivers/serial/*xmc4xxx*                 @parthitce
-/drivers/serial/*nuvoton*                 @ssekar15
-/drivers/serial/*apbuart*                 @martin-aberg
-/drivers/serial/*rcar*                    @aaillet
-/drivers/disk/                            @jfischer-no
-/drivers/disk/sdmmc_sdhc.h                @JunYangNXP
-/drivers/disk/sdmmc_spi.c                 @JunYangNXP
-/drivers/disk/usdhc.c                     @JunYangNXP
-/drivers/disk/sdmmc_stm32.c               @anthonybrandon
-/drivers/net/                             @jukkar @tbursztyka
-/drivers/ptp_clock/                       @jukkar
-/drivers/spi/                             @tbursztyka
-/drivers/spi/spi_rv32m1_lpspi*            @karstenkoenig
-/drivers/timer/apic_timer.c               @dcpleung @nashif
-/drivers/timer/apic_tsc.c                 @andyross
-/drivers/timer/arm_arch_timer.c           @carlocaione
-/drivers/timer/cortex_m_systick.c         @ioannisg
-/drivers/timer/altera_avalon_timer_hal.c  @nashif
-/drivers/timer/riscv_machine_timer.c      @kgugala @pgielda
-/drivers/timer/ite_it8xxx2_timer.c        @ite
-/drivers/timer/xlnx_psttc_timer*          @wjliang @stephanosio
-/drivers/timer/cc13x2_cc26x2_rtc_timer.c  @vanti
-/drivers/timer/cavs_timer.c               @dcpleung
-/drivers/timer/stm32_lptim_timer.c        @FRASTM
-/drivers/timer/leon_gptimer.c             @martin-aberg
-/drivers/timer/rcar_cmt_timer.c           @julien-massot
-/drivers/usb/                             @jfischer-no
-/drivers/usb/device/usb_dc_stm32.c        @ydamigos @loicpoulain
-/drivers/video/                           @loicpoulain
-/drivers/i2c/i2c_ll_stm32*                @ydamigos
-/drivers/i2c/i2c_rv32m1_lpi2c*            @henrikbrixandersen
-/drivers/i2c/*sam0*                       @Sizurka
-/drivers/i2c/i2c_dw*                      @dcpleung
-/drivers/*/*xec*                          @franciscomunoz @albertofloyd @scottwcpg
-/drivers/watchdog/*gecko*                 @oanerer
-/drivers/watchdog/*sifive*                @katsuster
-/drivers/watchdog/wdt_handlers.c          @dcpleung @nashif
-/drivers/watchdog/*cc32xx*                @pavlohamov
-/drivers/wifi/                            @jukkar @tbursztyka @pfalcon
-/drivers/wifi/esp_at/                     @mniestroj
-/drivers/wifi/eswifi/                     @loicpoulain @nandojve
-/drivers/wifi/winc1500/                   @kludentwo
-/drivers/virtualization/		  @tbursztyka
-/dts/arc/                                 @abrodkin @ruuddw @iriszzw @evgeniy-paltsev
-/dts/arm/acsip/                           @NorthernDean
-/dts/arm/atmel/sam4e*                     @nandojve
-/dts/arm/atmel/sam4l*                     @nandojve
-/dts/arm/atmel/samr21.dtsi                @benpicco
-/dts/arm/atmel/sam*5*.dtsi                @benpicco
-/dts/arm/atmel/same70*                    @nandojve
-/dts/arm/atmel/samv71*                    @nandojve
-/dts/arm/atmel/                           @galak
-/dts/arm/broadcom/                        @sbranden
-/dts/arm/cypress/                         @nandojve
-/dts/arm/infineon/                        @parthitce
-/dts/arm64/                               @carlocaione
-/dts/arm64/armv8-r.dtsi                   @povergoing
-/dts/arm64/nxp/                           @JiafeiPan
-/dts/arm/quicklogic/                      @wtatarski @kowalewskijan @kgugala
-/dts/arm/st/                              @erwango
-/dts/arm/ti/cc13?2*                       @bwitherspoon
-/dts/arm/ti/cc26?2*                       @bwitherspoon
-/dts/arm/ti/cc3235*                       @vanti
-/dts/arm/nordic/                          @ioannisg @carlescufi
-/dts/arm/nuvoton/                         @ssekar15
-/dts/arm/nuvoton/npcx/                    @MulinChao @WealianLiao @ChiHuaL
-/dts/arm/nxp/                             @MaureenHelm @mmahadevan108 @dleach02
-/dts/arm/microchip/                       @franciscomunoz @albertofloyd @scottwcpg
-/dts/arm/silabs/efm32_pg_1b.dtsi          @rdmeneze
-/dts/arm/silabs/efm32gg11b*               @oanerer
-/dts/arm/silabs/efm32_jg_pg*              @chrta
-/dts/arm/silabs/efr32bg13p*               @mnkp
-/dts/arm/silabs/efr32xg13p*               @mnkp
-/dts/arm/silabs/efm32jg12b*               @chrta
-/dts/arm/silabs/efm32pg12b*               @chrta
-/dts/arm/silabs/efm32pg1b*                @rdmeneze
-/dts/arm/silabs/efr32mg21*                @l-alfred
-/dts/arm/silabs/efr32fg13*                @yonsch
-/dts/riscv/                               @kgugala @pgielda
-/dts/riscv/it8xxx2.dtsi                   @ite
-/dts/riscv/microsemi-miv.dtsi             @galak
-/dts/riscv/rv32m1*                        @MaureenHelm
-/dts/riscv/riscv32-litex-vexriscv.dtsi    @mateusz-holenko @kgugala @pgielda
-/dts/arm/armv*m.dtsi                      @galak @ioannisg
-/dts/arm/armv7-r.dtsi                     @bbolen @stephanosio
-/dts/arm/xilinx/                          @bbolen @stephanosio
-/dts/arm/renesas/                         @julien-massot
-/dts/x86/                                 @jhedberg
-/dts/xtensa/xtensa.dtsi                   @ydamigos
-/dts/xtensa/intel/                        @dcpleung
-/dts/sparc/                               @martin-aberg
-/dts/bindings/                            @galak
-/dts/bindings/can/                        @alexanderwachter
-/dts/bindings/i2c/zephyr*i2c-emul.yaml    @sjg20
-/dts/bindings/adc/st*stm32-adc.yaml       @cybertale
-/dts/bindings/modem/*hl7800.yaml          @rerickson1
-/dts/bindings/serial/ns16550.yaml         @dcpleung @nashif
-/dts/bindings/wifi/*esp-at.yaml           @mniestroj
-/dts/bindings/*/*npcx*                    @MulinChao @WealianLiao @ChiHuaL
-/dts/bindings/*/*psoc6*                   @nandojve
-/dts/bindings/*/nordic*                   @anangl
-/dts/bindings/*/nxp*                      @MaureenHelm @mmahadevan108 @dleach02
-/dts/bindings/*/openisa*                  @MaureenHelm
-/dts/bindings/*/st*                       @erwango
-/dts/bindings/sensor/ams*                 @alexanderwachter
-/dts/bindings/*/sifive*                   @mateusz-holenko @kgugala @pgielda
-/dts/bindings/*/litex*                    @mateusz-holenko @kgugala @pgielda
-/dts/bindings/*/vexriscv*                 @mateusz-holenko @kgugala @pgielda
-/dts/bindings/pm_cpu_ops/*                @carlocaione
-/dts/posix/                               @aescolar @vanwinkeljan @daor-oti
-/dts/bindings/sensor/*bme680*             @BoschSensortec
-/dts/bindings/sensor/st*                  @avisconti
-/dts/common/                              @galak
-/include/                                 @nashif @carlescufi @galak @MaureenHelm
-/include/drivers/*/*litex*                @mateusz-holenko @kgugala @pgielda
-/include/drivers/adc.h                    @anangl
-/include/drivers/can.h                    @alexanderwachter
-/include/drivers/counter.h                @nordic-krch
-/include/drivers/dac.h                    @martinjaeger
-/include/drivers/display.h                @vanwinkeljan
-/include/drivers/espi.h                   @albertofloyd @franciscomunoz @scottwcpg
-/include/drivers/bluetooth/               @joerchan @jhedberg @Vudentz
-/include/drivers/flash.h                  @nashif @carlescufi @galak @MaureenHelm @nvlsianpu
-/include/drivers/i2c_emul.h               @sjg20
-/include/drivers/led/ht16k33.h            @henrikbrixandersen
-/include/drivers/interrupt_controller/    @dcpleung @nashif
-/include/drivers/interrupt_controller/gic.h @stephanosio
-/include/drivers/modem/hl7800.h           @rerickson1
-/include/drivers/pcie/                    @dcpleung
-/include/drivers/hwinfo.h                 @alexanderwachter
-/include/drivers/led.h                    @Mani-Sadhasivam
-/include/drivers/led_strip.h              @mbolivar-nordic
-/include/drivers/sensor.h                 @MaureenHelm
-/include/drivers/spi.h                    @tbursztyka
-/include/drivers/lora.h                   @Mani-Sadhasivam
-/include/drivers/peci.h                   @albertofloyd @franciscomunoz @scottwcpg
-/include/drivers/pm_cpu_ops.h             @carlocaione
-/include/drivers/pm_cpu_ops/              @carlocaione
-/include/app_memory/                      @dcpleung
-/include/arch/arc/                        @abrodkin @ruuddw @evgeniy-paltsev
-/include/arch/arc/arch.h                  @abrodkin @ruuddw @evgeniy-paltsev
-/include/arch/arc/v2/irq.h                @abrodkin @ruuddw @evgeniy-paltsev
-/include/arch/arm/aarch32/                @MaureenHelm @galak @ioannisg
-/include/arch/arm/aarch32/cortex_a_r/     @stephanosio
-/include/arch/arm64/                      @carlocaione
-/include/arch/arm64/cortex_r/             @povergoing
-/include/arch/arm/aarch32/irq.h           @carlocaione
-/include/arch/nios2/                      @nashif
-/include/arch/nios2/arch.h                @nashif
-/include/arch/posix/                      @aescolar @daor-oti
-/include/arch/riscv/                      @kgugala @pgielda
-/include/arch/x86/                        @jhedberg @dcpleung
-/include/arch/common/                     @andyross @nashif
-/include/arch/xtensa/                     @andyross @dcpleung
-/include/arch/sparc/                      @martin-aberg
-/include/sys/atomic.h                     @andyross
-/include/bluetooth/                       @joerchan @jhedberg @Vudentz
-/include/bluetooth/audio/                 @joerchan @jhedberg @Vudentz @Thalley @asbjornsabo
-/include/cache.h                          @carlocaione @andyross
-/include/canbus/                          @alexanderwachter
-/include/tracing/                         @nashif
-/include/debug/                           @nashif
-/include/debug/coredump.h                 @dcpleung
-/include/debug/gdbstub.h                  @ceolin
-/include/device.h                         @tbursztyka @nashif
-/include/devicetree.h                     @galak
-/include/display/                         @vanwinkeljan
-/include/dt-bindings/clock/kinetis_mcg.h  @henrikbrixandersen
-/include/dt-bindings/clock/kinetis_scg.h  @henrikbrixandersen
-/include/dt-bindings/dma/stm32_dma.h      @cybertale
-/include/dt-bindings/pcie/                @dcpleung
-/include/dt-bindings/usb/usb.h            @galak
-/include/drivers/emul.h                   @sjg20
-/include/fs/                              @nashif @nvlsianpu @de-nordic
-/include/init.h                           @nashif @andyross
-/include/irq.h                            @dcpleung @nashif @andyross
-/include/irq_offload.h                    @dcpleung @nashif @andyross
-/include/kernel.h                         @dcpleung @nashif @andyross
-/include/kernel_version.h                 @dcpleung @nashif @andyross
-/include/linker/app_smem*.ld              @dcpleung @nashif
-/include/linker/                          @dcpleung @nashif @andyross
-/include/logging/                         @nordic-krch
-/include/lorawan/lorawan.h                @Mani-Sadhasivam
-/include/mgmt/osdp.h                      @cbsiddharth
-/include/net/                             @jukkar @tbursztyka @pfalcon
-/include/net/buf.h                        @jukkar @jhedberg @tbursztyka @pfalcon
-/include/net/coap*.h                      @jukkar @rlubos
-/include/net/lwm2m*.h                     @jukkar @rlubos
-/include/net/mqtt.h                       @jukkar @rlubos
-/include/posix/                           @pfalcon
-/include/pm/pm.h                          @nashif @ceolin
-/include/drivers/ptp_clock.h              @jukkar
-/include/shared_irq.h                     @dcpleung @nashif @andyross
-/include/shell/                           @jakub-uC @nordic-krch
-/include/sw_isr_table.h                   @dcpleung @nashif @andyross
-/include/sys_clock.h                      @dcpleung @nashif @andyross
-/include/sys/sys_io.h                     @dcpleung @nashif @andyross
-/include/sys/kobject.h                    @dcpleung @nashif
-/include/toolchain.h                      @dcpleung @andyross @nashif
-/include/toolchain/                       @dcpleung @nashif @andyross
-/include/zephyr.h                         @dcpleung @nashif @andyross
-/kernel/                                  @dcpleung @nashif @andyross
-/lib/util/                                @carlescufi @jakub-uC
-/lib/util/fnmatch/                        @carlescufi @jakub-uC
-/lib/util/getopt/                         @jakub-uC
-/lib/gui/                                 @vanwinkeljan
-/lib/open-amp/                            @arnopo
-/lib/os/                                  @dcpleung @nashif @andyross
-/lib/os/cbprintf_packaged.c               @npitre
-/lib/posix/                               @pfalcon
-/subsys/portability/                      @nashif
-/lib/libc/                                @nashif
-/modules/                                 @nashif
-/modules/trusted-firmware-m/              @ioannisg @microbuilder
-/kernel/device.c                          @andyross @nashif
-/kernel/idle.c                            @andyross @nashif
-/samples/                                 @nashif
-/samples/basic/minimal/                   @carlescufi
-/samples/basic/servo_motor/boards/*microbit* @jhe
-/samples/bluetooth/                       @jhedberg @Vudentz @joerchan
-/samples/boards/intel_s1000_crb/          @sathishkuttan @dcpleung @nashif
-/samples/subsys/display/                  @vanwinkeljan
-/samples/drivers/can/                     @alexanderwachter
-/samples/drivers/clock_control_litex/     @mateusz-holenko @kgugala @pgielda
-/samples/drivers/display/                 @vanwinkeljan
-/samples/drivers/ht16k33/                 @henrikbrixandersen
-/samples/drivers/lora/                    @Mani-Sadhasivam
-/samples/subsys/lorawan/                  @Mani-Sadhasivam
-/samples/net/                             @jukkar @tbursztyka @pfalcon
-/samples/net/cloud/tagoio_http_post/      @nandojve
-/samples/net/dns_resolve/                 @jukkar @tbursztyka @pfalcon
-/samples/net/lwm2m_client/                @rlubos
-/samples/net/mqtt_publisher/              @jukkar @tbursztyka
-/samples/net/sockets/coap_*/              @rlubos
-/samples/net/sockets/                     @jukkar @tbursztyka @pfalcon
-/samples/net/*civetweb*                   @Nukersson
-/samples/sensor/                          @MaureenHelm
-/samples/shields/                         @avisconti
-/samples/subsys/logging/                  @nordic-krch @jakub-uC
-/samples/subsys/shell/                    @jakub-uC @nordic-krch
-/samples/subsys/mgmt/mcumgr/smp_svr/      @aunsbjerg @nvlsianpu
-/samples/subsys/mgmt/updatehub/           @nandojve @otavio
-/samples/subsys/mgmt/osdp/                @cbsiddharth
-/samples/subsys/usb/                      @jfischer-no
-/samples/subsys/pm/                       @nashif @ceolin
-/samples/tfm_integration/                 @ioannisg @microbuilder
-/samples/userspace/                       @dcpleung @nashif
-/scripts/coccicheck                       @himanshujha199640 @JuliaLawall
-/scripts/coccinelle/                      @himanshujha199640 @JuliaLawall
-/scripts/coredump/                        @dcpleung
-/scripts/kconfig/                         @ulfalizer
-/scripts/logging/dictionary/              @dcpleung
-/scripts/pylib/twister/expr_parser.py     @nashif
-/scripts/schemas/twister/                 @nashif
-/scripts/gen_app_partitions.py            @dcpleung @nashif
-/scripts/get_maintainer.py                @nashif
-/scripts/dts/                             @mbolivar-nordic @galak
-/scripts/release/                         @nashif
-/scripts/ci/                              @nashif
-/arch/x86/gen_gdt.py                      @dcpleung @nashif
-/arch/x86/gen_idt.py                      @dcpleung @nashif
-/scripts/gen_kobject_list.py              @dcpleung @nashif
-/scripts/gen_kobject_placeholders.py      @dcpleung
-/scripts/gen_syscalls.py                  @dcpleung @nashif
-/scripts/list_boards.py                   @mbolivar-nordic
-/scripts/net/                             @jukkar
-/scripts/process_gperf.py                 @dcpleung @nashif
-/scripts/gen_relocate_app.py              @dcpleung
-/scripts/requirements*.txt                @mbolivar-nordic @galak @nashif
-/scripts/tests/twister/                   @aasthagr
-/scripts/tests/build/test_subfolder_list.py @rmstoi
-/scripts/tracing/                         @nashif
-/scripts/pylib/twister/                   @nashif
-/scripts/twister                          @nashif
-/scripts/series-push-hook.sh              @erwango
-/scripts/west_commands/                   @mbolivar-nordic
-/scripts/west-commands.yml                @mbolivar-nordic
-/scripts/zephyr_module.py                 @tejlmand
-/scripts/uf2conv.py                       @petejohanson
-/scripts/user_wordsize.py                 @cfriedt
-/scripts/valgrind.supp                    @aescolar @daor-oti
-/share/zephyr-package/                    @tejlmand
-/share/zephyrunittest-package/            @tejlmand
-/subsys/bluetooth/                        @joerchan @jhedberg @Vudentz
-/subsys/bluetooth/audio/                  @joerchan @jhedberg @Vudentz @Thalley @asbjornsabo
-/subsys/bluetooth/controller/             @carlescufi @cvinayak @thoh-ot @kruithofa
-/subsys/bluetooth/mesh/                   @jhedberg @trond-snekvik @joerchan @Vudentz
-/subsys/canbus/                           @alexanderwachter
-/subsys/cpp/                              @vanwinkeljan
-/subsys/debug/                            @nashif
-/subsys/debug/coredump/                   @dcpleung
-/subsys/debug/gdbstub/                    @ceolin
-/subsys/debug/gdbstub.c                   @ceolin
-/subsys/dfu/                              @nvlsianpu
-/subsys/disk/                             @jfischer-no
-/subsys/tracing/                          @nashif
-/subsys/debug/asan_hacks.c                @vanwinkeljan @aescolar @daor-oti
-/subsys/demand_paging/                    @dcpleung @nashif
-/subsys/emul/                             @sjg20
-/subsys/fb/                               @jfischer-no
-/subsys/fs/                               @nashif
-/subsys/fs/fcb/                           @nvlsianpu
-/subsys/fs/fuse_fs_access.c               @vanwinkeljan
-/subsys/fs/nvs/                           @Laczen
-/subsys/ipc/                              @ioannisg
-/subsys/logging/                          @nordic-krch
-/subsys/logging/log_backend_net.c         @nordic-krch @jukkar
-/subsys/lorawan/                          @Mani-Sadhasivam
-/subsys/mgmt/ec_host_cmd/                 @jettr
-/subsys/mgmt/mcumgr/                      @carlescufi @nvlsianpu
-/subsys/mgmt/hawkbit/                     @Navin-Sankar
-/subsys/mgmt/mcumgr/smp_udp.c             @aunsbjerg
-/subsys/mgmt/updatehub/                   @nandojve @otavio
-/subsys/mgmt/osdp/                        @cbsiddharth
-/subsys/modbus/                           @jfischer-no
-/subsys/net/buf.c                         @jukkar @jhedberg @tbursztyka @pfalcon
-/subsys/net/ip/                           @jukkar @tbursztyka @pfalcon
-/subsys/net/lib/                          @jukkar @tbursztyka @pfalcon
-/subsys/net/lib/dns/                      @jukkar @tbursztyka @pfalcon @cfriedt
-/subsys/net/lib/lwm2m/                    @rlubos
-/subsys/net/lib/config/                   @jukkar @tbursztyka @pfalcon
-/subsys/net/lib/mqtt/                     @jukkar @tbursztyka @rlubos
-/subsys/net/lib/coap/                     @rlubos
-/subsys/net/lib/sockets/socketpair.c      @cfriedt
-/subsys/net/lib/sockets/                  @jukkar @tbursztyka @pfalcon
-/subsys/net/lib/tls_credentials/          @rlubos
-/subsys/net/l2/                           @jukkar @tbursztyka
-/subsys/net/l2/canbus/                    @alexanderwachter @jukkar
-/subsys/net/*/openthread/                 @rlubos
-/subsys/pm/                               @nashif @ceolin
-/subsys/random/                           @dleach02
-/subsys/settings/                         @nvlsianpu
-/subsys/shell/                            @jakub-uC @nordic-krch
-/subsys/stats/                            @nvlsianpu
-/subsys/storage/                          @nvlsianpu
-/subsys/task_wdt/                         @martinjaeger
-/subsys/testsuite/                        @nashif
-/subsys/timing/                           @nashif @dcpleung
-/subsys/usb/                              @jfischer-no
-/subsys/usb/class/dfu/usb_dfu.c           @nvlsianpu
-/tests/                                   @nashif
-/tests/arch/arm/                          @ioannisg @stephanosio
-/tests/benchmarks/cmsis_dsp/              @stephanosio
-/tests/boards/native_posix/               @aescolar @daor-oti
-/tests/boards/intel_s1000_crb/            @dcpleung @sathishkuttan
-/tests/bluetooth/                         @joerchan @jhedberg @Vudentz
-/tests/bluetooth/bsim_bt/                 @joerchan @jhedberg @Vudentz @aescolar @wopu-ot
-/tests/posix/                             @pfalcon
-/tests/crypto/                            @ceolin
-/tests/crypto/mbedtls/                    @nashif @ceolin
-/tests/drivers/can/                       @alexanderwachter
-/tests/drivers/counter/                   @nordic-krch
-/tests/drivers/eeprom/                    @henrikbrixandersen @sjg20
-/tests/drivers/flash_simulator/           @nvlsianpu
-/tests/drivers/gpio/                      @mnkp
-/tests/drivers/hwinfo/                    @alexanderwachter
-/tests/drivers/spi/                       @tbursztyka
-/tests/drivers/uart/uart_async_api/       @Mierunski
-/tests/kernel/                            @dcpleung @andyross @nashif
-/tests/lib/                               @nashif
-/tests/lib/cmsis_dsp/                     @stephanosio
-/tests/net/                               @jukkar @tbursztyka @pfalcon
-/tests/net/buf/                           @jukkar @jhedberg @tbursztyka @pfalcon
-/tests/net/lib/                           @jukkar @tbursztyka @pfalcon
-/tests/net/lib/http_header_fields/        @jukkar @tbursztyka
-/tests/net/lib/mqtt_packet/               @jukkar @tbursztyka
-/tests/net/lib/coap/                      @rlubos
-/tests/net/socket/socketpair/             @cfriedt
-/tests/net/socket/                        @jukkar @tbursztyka @pfalcon
-/tests/subsys/debug/coredump/             @dcpleung
-/tests/subsys/fs/                         @nashif @nvlsianpu @de-nordic
-/tests/subsys/settings/                   @nvlsianpu
-/tests/subsys/shell/                      @jakub-uC @nordic-krch
 # Get all docs reviewed
-*.rst                                     @nashif
-/doc/reference/kernel/                    @andyross @nashif
-*posix*.rst                               @aescolar @daor-oti
+*.rst                                    @dbkinder
+.known-issues/*                          @inakypg @nashif
+MAINTAINERS                              @inakypg @nashif
+arch/arc/*                               @cjordan44 @ruuddw
+arch/arc/core/*                          @andrewboie
+arch/arm/*                               @MaureenHelm @galak
+arch/arm/core/*                          @andrewboie
+arch/arm/soc/arm/mps2/*                  @fvincenzo
+arch/arm/soc/st_stm32/*                  @erwango
+arch/arm/soc/st_stm32/stm32f4/*          @rsalveti @idlethread
+arch/arm/soc/ti_simplelink/cc32xx        @GAnthony
+arch/nios2/*                             @andrewboie
+arch/nios2/core/*                        @andrewboie
+arch/riscv32                             @fractalclone
+arch/x86/*                               @andrewboie @youvedeep
+arch/x86/core/*                          @andrewboie
+arch/x86/core/crt0.S                     @youvedeep @nashif
+arch/x86/soc/intel_quark/quark_d2000/*   @nashif
+arch/x86/soc/intel_quark/quark_se/*      @nashif
+arch/x86/soc/intel_quark/quark_x1000/*   @nashif
+arch/xtensa/*                            @andrewboie
+boards/arc/*                             @cjordan44 @ruuddw
+boards/arc/arduino_101_sss/*             @nashif
+boards/arc/em_starterkit/*               @cjordan44
+boards/arc/quark_se_c1000_ss_devboard/*  @nashif
+boards/arm/*                             @MaureenHelm @galak
+boards/arm/96b_carbon/*                  @rsalveti @idlethread
+boards/arm/96b_nitrogen/*                @idlethread
+boards/arm/arduino_101_ble/*             @jhedberg
+boards/arm/cc3220sf_launchxl/*           @GAnthony
+boards/arm/disco_l475_iot1/*             @erwango
+boards/arm/frdm_k64f/*                   @MaureenHelm
+boards/arm/frdm_kw41z/*                  @MaureenHelm
+boards/arm/hexiwear_k64/*                @MaureenHelm
+boards/arm/mps2_an385/*                  @fvincenzo
+boards/arm/nrf51_blenano/*               @rsalveti
+boards/arm/nrf52_pca10040/*              @carlescufi
+boards/arm/nucleo_f401re/*               @rsalveti @idlethread
+boards/arm/v2m_beetle/*                  @fvincenzo
+boards/arm/olimexino_stm32/*             @ydamigos
+boards/arm/stm32f3_disco/*               @ydamigos
+boards/nios2/*                           @andrewboie
+boards/nios2/altera_max10/*              @andrewboie
+boards/riscv32                           @fractalclone
+boards/x86/*                             @andrewboie @youvedeep
+boards/x86/arduino_101/*                 @nashif
+boards/x86/galileo/*                     @nashif
+boards/x86/quark_d2000_crb/*             @nashif
+boards/x86/quark_se_c1000_devboard/*     @nashif
+boards/xtensa/*                          @andrewboie
+doc/*                                    @dbkinder
+doc/subsystems/bluetooth/*               @sjanc @jhedberg @Vudentz
+drivers/*/*qmsi*                         @nashif
+drivers/*/*stm32*                        @erwango
+drivers/bluetooth/*                      @sjanc @jhedberg @Vudentz
+drivers/clock_control/*stm32f4*          @rsalveti @idlethread
+drivers/ethernet/*                       @jukkar @tbursztyka
+drivers/flash/*                          @nashif
+drivers/gpio/*stm32*                     @rsalveti @idlethread
+drivers/gpio/gpio_pulpino.c              @fractalclone
+drivers/ieee802154/*                     @jukkar @tbursztyka
+drivers/interrupt_controller/*           @andrewboie
+drivers/pinmux/stm32/*                   @rsalveti @idlethread
+drivers/sensor/*                         @bogdan-davidoaia
+drivers/serial/uart_altera_jtag.c        @andrewboie
+drivers/serial/uart_riscv_qemu.c         @fractalclone
+drivers/slip/*                           @jukkar @tbursztyka
+drivers/spi/*                            @tbursztyka
+drivers/spi/spi_ll_stm32.*               @superna9999 @mbolivar
+drivers/timer/altera_avalon_timer.c      @andrewboie
+drivers/timer/pulpino_timer.c            @fractalclone
+drivers/timer/riscv_machine_timer.c      @fractalclone
+drivers/usb                              @youvedeep @andyross
+drivers/i2c/i2c_ll_stm32*                @ldts @ydamigos
+dts/arm/st/*                             @erwango
+ext/fs/*                                 @nashif
+ext/hal/cmsis/*                          @MaureenHelm @galak
+ext/hal/nordic/mdk/*                     @carlescufi
+ext/hal/nxp/mcux/*                       @MaureenHelm
+ext/hal/qmsi/*                           @nashif
+ext/hal/st/stm32cube/*                   @erwango
+ext/lib/crypto/mbedtls/*                 @nashif
+ext/lib/crypto/tinycrypt/*               @lpereira
+include/arch/arc/*                       @cjordan44 @ruuddw
+include/arch/arc/arch.h                  @andrewboie
+include/arch/arc/v2/irq.h                @andrewboie
+include/arch/arm/*                       @MaureenHelm @galak
+include/arch/arm/cortex_m/irq.h          @andrewboie
+include/arch/nios2/*                     @andrewboie
+include/arch/nios2/arch.h                @andrewboie
+include/arch/riscv32                     @fractalclone
+include/arch/x86/*                       @andrewboie @youvedeep
+include/arch/x86/arch.h                  @andrewboie
+include/arch/xtensa/*                    @andrewboie
+include/atomic.h                         @andrewboie @andyross
+include/bluetooth/*                      @sjanc @jhedberg @Vudentz
+include/cache.h                          @andrewboie @andyross
+include/device.h                         @youvedeep @nashif
+include/drivers/bluetooth/*              @sjanc @jhedberg @Vudentz
+include/drivers/ioapic.h                 @andrewboie
+include/drivers/loapic.h                 @andrewboie
+include/drivers/mvic.h                   @andrewboie
+include/fs.h                             @nashif
+include/fs/*                             @nashif
+include/init.h                           @andrewboie @andyross
+include/init.h                           @youvedeep @nashif
+include/irq.h                            @andrewboie
+include/irq.h                            @andrewboie @andyross
+include/irq_offload.h                    @andrewboie @andyross
+include/kernel.h                         @andrewboie @andyross
+include/kernel_version.h                 @andrewboie @andyross
+include/linker/linker-defs.h             @andrewboie @andyross
+include/linker/linker-tool-gcc.h         @andrewboie @andyross
+include/linker/linker-tool.h             @andrewboie @andyross
+include/linker/section_tags.h            @andrewboie @andyross
+include/linker/sections.h                @andrewboie @andyross
+include/misc/*                           @andrewboie @andyross
+include/net/*                            @jukkar @tbursztyka
+include/net/buf.h                        @jukkar @jhedberg @tbursztyka
+include/power.h                          @youvedeep @nashif
+include/sensor.h                         @bogdan-davidoaia
+include/shared_irq.h                     @andrewboie @andyross
+include/spi.h                            @tbursztyka
+include/sw_isr_table.h                   @andrewboie @andyross
+include/sys_clock.h                      @andrewboie @andyross
+include/sys_io.h                         @andrewboie @andyross
+include/toolchain.h                      @andrewboie @andyross
+include/toolchain/*                      @andrewboie @andyross
+include/zephyr.h                         @andrewboie @andyross
+kernel/*                                 @andrewboie @andyross
+kernel/device.c                          @youvedeep @nashif
+kernel/idle.c                            @youvedeep @nashif
+samples/bluetooth/*                      @sjanc @jhedberg @Vudentz
+samples/boards/quark_se_c1000/power*/*   @youvedeep @nashif
+samples/net/*                            @jukkar @tbursztyka
+samples/net/dns_resolve/*                @jukkar @tbursztyka
+samples/net/http_server/*                @jukkar @tbursztyka
+samples/net/lwm2m_client/*               @mike-scott
+samples/net/mbedtls_sslclient/*          @nashif
+samples/net/mqtt_publisher/*             @jukkar @tbursztyka
+samples/net/zoap_client/*                @vcgomes
+samples/net/zoap_server/*                @vcgomes
+samples/sensor/*                         @bogdan-davidoaia
+samples/subsys/usb                       @youvedeep @andyross
+scripts/expr_parser.py                   @andrewboie
+scripts/sanity_chk/*                     @andrewboie
+scripts/sanitycheck                      @andrewboie
+subsys/bluetooth/*                       @sjanc @jhedberg @Vudentz
+subsys/bluetooth/controller/*            @carlescufi @cvinayak
+subsys/fs/*                              @nashif
+subsys/net/buf.c                         @jukkar @jhedberg @tbursztyka
+subsys/net/ip/*                          @jukkar @tbursztyka
+subsys/net/lib/*                         @jukkar @tbursztyka
+subsys/net/lib/dns/*                     @jukkar @tbursztyka
+subsys/net/lib/http/*                    @jukkar @tbursztyka
+subsys/net/lib/lwm2m/*                   @mike-scott
+subsys/net/lib/mqtt/*                    @jukkar @tbursztyka
+subsys/net/lib/zoap/*                    @vcgomes
+subsys/usb                               @youvedeep @andyross
+tests/bluetooth/*                        @sjanc @jhedberg @Vudentz
+tests/crypto/*                           @lpereira
+tests/crypto/mbedtls/*                   @nashif
+tests/drivers/spi/*                      @tbursztyka
+tests/kernel/*                           @andrewboie @andyross
+tests/net/*                              @jukkar @tbursztyka
+tests/net/buf/*                          @jukkar @jhedberg @tbursztyka
+tests/net/lib/*                          @jukkar @tbursztyka
+tests/net/lib/http_header_fields/*       @jukkar @tbursztyka
+tests/net/lib/mqtt_packet/*              @jukkar @tbursztyka
+tests/net/lib/zoap/*                     @vcgomes
+tests/subsys/fs/*                        @nashif

CODE_OF_CONDUCT.md

@@ -1,78 +0,0 @@
-# Contributor Covenant Code of Conduct
-
-## Our Pledge
-
-In the interest of fostering an open and welcoming environment, we as
-contributors and maintainers pledge to making participation in our project and
-our community a harassment-free experience for everyone, regardless of age, body
-size, disability, ethnicity, sex characteristics, gender identity and expression,
-level of experience, education, socio-economic status, nationality, personal
-appearance, race, religion, or sexual identity and orientation.
-
-## Our Standards
-
-Examples of behavior that contributes to creating a positive environment
-include:
-
-* Using welcoming and inclusive language
-* Being respectful of differing viewpoints and experiences
-* Gracefully accepting constructive criticism
-* Focusing on what is best for the community
-* Showing empathy towards other community members
-
-Examples of unacceptable behavior by participants include:
-
-* The use of sexualized language or imagery and unwelcome sexual attention or
- advances
-* Trolling, insulting/derogatory comments, and personal or political attacks
-* Public or private harassment
-* Publishing others' private information, such as a physical or electronic
- address, without explicit permission
-* Other conduct which could reasonably be considered inappropriate in a
- professional setting
-
-## Our Responsibilities
-
-Project maintainers are responsible for clarifying the standards of acceptable
-behavior and are expected to take appropriate and fair corrective action in
-response to any instances of unacceptable behavior.
-
-Project maintainers have the right and responsibility to remove, edit, or
-reject comments, commits, code, wiki edits, issues, and other contributions
-that are not aligned to this Code of Conduct, or to ban temporarily or
-permanently any contributor for other behaviors that they deem inappropriate,
-threatening, offensive, or harmful.
-
-## Scope
-
-This Code of Conduct applies both within project spaces and in public spaces
-when an individual is representing the project or its community. Examples of
-representing a project or community include using an official project e-mail
-address, posting via an official social media account, or acting as an appointed
-representative at an online or offline event. Representation of a project may be
-further defined and clarified by project maintainers.
-
-## Enforcement
-
-Instances of abusive, harassing, or otherwise unacceptable behavior may be
-reported by contacting the project team at conduct@zephyrproject.org.
-Reports will be received by Kate Stewart (Linux Foundation) and Amy Occhialino
-(Intel). All complaints will be reviewed and investigated, and will result in a
-response that is deemed necessary and appropriate to the circumstances. The
-project team is obligated to maintain confidentiality with regard to the
-reporter of an incident.  Further details of specific enforcement policies may
-be posted separately.
-
-Project maintainers who do not follow or enforce the Code of Conduct in good
-faith may face temporary or permanent repercussions as determined by other
-members of the project's leadership.
-
-## Attribution
-
-This Code of Conduct is adapted from the [Contributor Covenant][homepage], version 1.4,
-available at https://www.contributor-covenant.org/version/1/4/code-of-conduct.html
-
-[homepage]: https://www.contributor-covenant.org
-
-For answers to common questions about this code of conduct, see
-https://www.contributor-covenant.org/faq

CONTRIBUTING.rst

@@ -6,34 +6,475 @@ patches directly to the project.  In our collaborative open source environment,
 standards and methods for submitting changes help reduce the chaos that can result
 from an active development community.
 
-This document briefly summarizes the full `Contribution
-Guidelines <http://docs.zephyrproject.org/latest/contribute/index.html>`_
-documentation.
+This document explains how to participate in project conversations, log bugs
+and enhancement requests, and submit patches to the project so your patch will
+be accepted quickly in the codebase.
 
-* Zephyr uses the permissive open source `Apache 2.0 license`_
-  that allows you to freely use, modify, distribute and sell your own products
-  that include Apache 2.0 licensed software.
 
-* There are some imported or reused components of the Zephyr project that
-  use other licensing and are clearly identified.
+Licensing
+*********
 
-* The Developer Certificate of Origin (DCO) process is followed to
-  ensure developers are following licensing criteria for their
-  contributions, and documented with a ``Signed-off-by`` line in commits.
+Licensing is very important to open source projects. It helps ensure the
+software continues to be available under the terms that the author desired.
 
-* Zephyr development workflow is supported on Linux, macOS, and Windows,
-  (with a few exceptions).
+.. _Apache 2.0 license:
+   https://github.com/zephyrproject-rtos/zephyr/blob/master/LICENSE
 
-* Source code for the project is maintained in the GitHub repo:
-  https://github.com/zephyrproject-rtos/zephyr
+.. _GitHub repo: https://github.com/zephyrproject-rtos/zephyr
 
-* Issue and feature tracking is done using GitHub issues in this repo.
+Zephyr uses the `Apache 2.0 license`_ (as found in the LICENSE file in the
+project's `GitHub repo`_) to strike a balance between open contribution and
+allowing you to use the software however you would like to. There are some
+imported or reused components of the Zephyr project that use other licensing,
+as described in `Zephyr Licensing`_.
 
-* A Continuous Integration (CI) system runs on every Pull Request (PR)
-  to verify several aspects of the PR including Git commit formatting,
-  Coding Style, sanity checks builds, and documentation builds.
+.. _Zephyr Licensing:
+   https://www.zephyrproject.org/doc/LICENSING.html
 
-* The `Zephyr devel mailing list`_ is a great place to engage with the
-  community, ask questions, discuss issues, and help each other.
+The license tells you what rights you have as a developer, provided by the
+copyright holder. It is important that the contributor fully understands the
+licensing rights and agrees to them. Sometimes the copyright holder isn't the
+contributor, such as when the contributor is doing work on behalf of a
+company.
 
-.. _Zephyr devel mailing list: https://lists.zephyrproject.org/g/devel
+.. _DCO:
+
+Developer Certification of Origin (DCO)
+***************************************
+
+To make a good faith effort to ensure licensing criteria are met, the Zephyr
+project requires the Developer Certificate of Origin (DCO) process to be
+followed.
+
+The DCO is an attestation attached to every contribution made by every
+developer. In the commit message of the contribution, (described more fully
+later in this document), the developer simply adds a ``Signed-off-by``
+statement and thereby agrees to the DCO.
+
+When a developer submits a patch, it is a commitment that the contributor has
+the right to submit the patch per the license.  The DCO agreement is shown
+below and at http://developercertificate.org/.
+
+
+.. code-block:: none
+
+    Developer's Certificate of Origin 1.1
+
+    By making a contribution to this project, I certify that:
+
+    (a) The contribution was created in whole or in part by me and I
+        have the right to submit it under the open source license
+        indicated in the file; or
+
+    (b) The contribution is based upon previous work that, to the
+        best of my knowledge, is covered under an appropriate open
+        source license and I have the right under that license to
+        submit that work with modifications, whether created in whole
+        or in part by me, under the same open source license (unless
+        I am permitted to submit under a different license), as
+        Indicated in the file; or
+
+    (c) The contribution was provided directly to me by some other
+        person who certified (a), (b) or (c) and I have not modified
+        it.
+
+    (d) I understand and agree that this project and the contribution
+        are public and that a record of the contribution (including
+        all personal information I submit with it, including my
+        sign-off) is maintained indefinitely and may be redistributed
+        consistent with this project or the open source license(s)
+        involved.
+
+DCO Sign-Off Methods
+====================
+
+The DCO requires a sign-off message in the following format appear on each
+commit in the pull request::
+
+   Signed-off-by: Zephyrus Zephyr <zephyrus@zephyrproject.org>
+
+The DCO text can either be manually added to your commit body, or you can add
+either ``-s`` or ``--signoff`` to your usual Git commit commands. If you forget
+to add the sign-off you can also amend a previous commit with the sign-off by
+running ``git commit --amend -s``. If you've pushed your changes to GitHub
+already you'll need to force push your branch after this with ``git push -f``.
+
+
+Prerequisites
+*************
+
+.. _Zephyr Project website: https://zephyrproject.org
+
+As a contributor, you'll want to be familiar with the Zephyr project, how to
+configure, install, and use it as explained in the `Zephyr Project website`_
+and how to set up your development environment as introduced in the Zephyr
+`Getting Started Guide`_.
+
+.. _Getting Started Guide:
+   https://www.zephyrproject.org/doc/getting_started/getting_started.html
+
+The examples below use a Linux host environment for Zephyr development.
+You should be familiar with common developer tools such as Git and Make, and
+platforms such as GitHub.
+
+If you haven't already done so, you'll need to create a (free) GitHub account
+on http://github.com and have Git tools available on your development system.
+
+Repository layout
+*****************
+
+To clone the main Zephyr Project repository use::
+
+    $ git clone https://github.com/zephyrproject-rtos/zephyr
+
+The Zephyr project directory structure is described in `Source Tree Structure`_
+documentation. In addition to the Zephyr kernel itself, you'll also find the
+sources for technical documentation, sample code, supported board
+configurations, and a collection of subsystem tests.  All of these are
+available for developers to contribute to and enhance.
+
+.. _Source Tree Structure:
+   https://www.zephyrproject.org/doc/kernel/overview/source_tree.html
+
+Pull Requests and Issues
+************************
+
+.. _Zephyr Project Issues: https://jira.zephyrproject.org
+
+.. _open pull requests: https://github.com/zephyrproject-rtos/zephyr/pulls
+
+.. _Zephyr-devel mailing list:
+   https://lists.zephyrproject.org/mailman/listinfo/zephyr-devel
+
+Before starting on a patch, first check in our Jira `Zephyr Project Issues`_
+system to see what's been reported on the issue you'd like to address.  Have a
+conversation on the `Zephyr-devel mailing list`_ (or the #zephyrproject IRC
+channel on freenode.net) to see what others think of your issue (and proposed
+solution).  You may find others that have encountered the issue you're
+finding, or that have similar ideas for changes or additions.  Send a message
+to the `Zephyr-devel mailing list`_ to introduce and discuss your idea with
+the development community.
+
+It's always a good practice to search for existing or related issues before
+submitting your own. When you submit an issue (bug or feature request), the
+triage team will review and comment on the submission, typically within a few
+business days.
+
+You can find all `open pull requests`_ on GitHub and open `Zephyr Project
+Issues`_ in Jira.
+
+Development Tools and Git Setup
+*******************************
+
+Signed-off-by
+=============
+
+The name in the commit message ``Signed-off-by:`` line and your email must
+match the change authorship information. Make sure your *.git/config* is set
+up correctly::
+
+   $ git config --global user.name "David Developer"
+   $ git config --global user.email "david.developer@company.com"
+
+gitlint
+=========
+
+When you submit a pull request to the project, a series of checks are
+performed to verify your commit messages meet the requirements. The same step
+done during the CI process can be performed locally using the the *gitlint*
+command.
+
+Install gitlint and run it locally in your tree and branch where your patches
+have been committed::
+
+     $ sudo pip3 install gitlint
+     $ gitlint
+
+Note, gitlint only checks HEAD (the most recent commit), so you should run it
+after each commit, or use the ``--commits`` option to specify a commit range
+covering all the development patches to be submitted.
+
+sanitycheck
+===========
+
+To verify that your changes did not break any tests or samples, please run the
+``sanitycheck`` script locally before submitting your pull request to GitHub. To
+run the same tests the CI system runs, follow these steps from within your
+local Zephyr source working directory::
+
+    $ source zephyr-env.sh
+    $ make host-tools
+    $ export PREBUILT_HOST_TOOLS=${ZEPHYR_BASE}/bin
+    $ export USE_CCACHE=1
+    $ ./scripts/sanitycheck
+
+The above will execute the basic sanitycheck script, which will run various
+kernel tests using the QEMU emulator.  It will also do some build tests on
+various samples with advanced features that can't run in QEMU.
+
+We highly recommend you run these tests locally to avoid any CI failures.
+Using CCACHE and pre-built host tools is optional, however it speeds up the
+execution time considerably.
+
+
+Coding Style
+************
+
+Use these coding guidelines to ensure that your development complies with the
+project's style and naming conventions.
+
+.. _Linux kernel coding style:
+   https://kernel.org/doc/html/latest/process/coding-style.html
+
+
+In general, follow the `Linux kernel coding style`_, with the
+following exceptions:
+
+* Add braces to every ``if`` and ``else`` body, even for single-line code
+  blocks. Use the ``--ignore BRACES`` flag to make *checkpatch* stop
+  complaining.
+* Use spaces instead of tabs to align comments after declarations, as needed.
+* Use C89-style single line comments, ``/*  */``. The C99-style single line
+  comment, ``//``, is not allowed.
+* Use ``/**  */`` for doxygen comments that need to appear in the documentation.
+
+The Linux kernel GPL-licensed tool ``checkpatch`` is used to check coding
+style conformity. Checkpatch is available in the scripts directory. To invoke
+it when committing code, edit your *.git/hooks/pre-commit* file to contain:
+
+.. code-block:: bash
+
+    #!/bin/sh
+    set -e exec
+    exec git diff --cached | ${ZEPHYR_BASE}/scripts/checkpatch.pl - || true
+
+Contribution Workflow
+*********************
+
+One general practice we encourage, is to make small,
+controlled changes. This practice simplifies review, makes merging and
+rebasing easier, and keeps the change history clear and clean.
+
+When contributing to the Zephyr Project, it is also important you provide as much
+information as you can about your change, update appropriate documentation,
+and test your changes thoroughly before submitting.
+
+The general GitHub workflow used by Zephyr developers uses a combination of
+command line Git commands and browser interaction with GitHub.  As it is with
+Git, there are multiple ways of getting a task done.  We'll describe a typical
+workflow here:
+
+.. _Create a Fork of Zephyr:
+   https://github.com/zephyrproject-rtos/zephyr#fork-destination-box
+
+#. `Create a Fork of Zephyr`_
+   to your personal account on GitHub.  (Click on the fork button in the top
+   right corner of the Zephyr project repo page in GitHub.)
+
+#. On your development computer, clone the fork you just made::
+
+     $ git clone https://github.com/<your github id>/zephyr
+
+   This would be a good time to let Git know about the upstream repo too::
+
+     $ git remote add upstream https://github.com/zephyrproject-rtos/zephyr.git
+
+   and verify the remote repos::
+
+     $ git remote -v
+
+#. Create a topic branch (off of master) for your work (if you're addressing
+   Jira issue, we suggest including the Jira issue number in the branch name)::
+
+     $ git checkout master
+     $ git checkout -b fix_comment_typo
+
+   Some Zephyr subsystems do development work on a separate branch from
+   master so you may need to indicate this in your checkout::
+
+     $ git checkout -b fix_out_of_date_patch origin/net
+
+#. Make changes, test locally, change, test, test again, ...  (Check out the
+   prior chapter on `sanitycheck`_ as well).
+
+#. When things look good, start the pull request process by adding your changed
+   files::
+
+     $ git add [file(s) that changed, add -p if you want to be more specific]
+
+   You can see files that are not yet staged using::
+
+     $ git status
+
+#. Verify changes to be committed look as you expected::
+
+     $ git diff --cached
+
+#. Commit your changes to your local repo::
+
+     $ git commit -s
+
+   The ``-s`` option automatically adds your ``Signed-off-by:`` to your commit
+   message.  Your commit will be rejected without this line that indicates your
+   agreement with the `DCO`_.  See the `Commit Guidelines`_ section for
+   specific guidelines for writing your commit messages.
+
+#. Push your topic branch with your changes to your fork in your personal
+   GitHub account::
+
+     $ git push origin fix_comment_typo
+
+#. In your web browser, go to your forked repo and click on the
+   ``Compare & pull request`` button for the branch you just worked on and
+   you want to open a pull request with.
+
+#. Review the pull request changes, and verify that you are opening a
+   pull request for the appropriate branch. The title and message from your
+   commit message should appear as well.
+
+#. If you're working on a subsystem branch that's not ``master``,
+   you may need to change the intended branch for the pull request
+   here, for example, by changing the base branch from ``master`` to ``net``.
+
+#. GitHub will assign one or more suggested reviewers (based on the
+   CODEOWNERS file in the repo). If you are a project member, you can
+   select additional reviewers now too.
+
+#. Click on the submit button and your pull request is sent and awaits
+   review.  Email will be sent as review comments are made, or you can check
+   on your pull request at https://github.com/zephyrproject-rtos/zephyr/pulls.
+
+#. While you're waiting for your pull request to be accepted and merged, you
+   can create another branch to work on another issue. (Be sure to make your
+   new branch off of master and not the previous branch.)::
+
+     $ git checkout master
+     $ git checkout -b fix_another_issue
+
+   and use the same process described above to work on this new topic branch.
+
+#. If reviewers do request changes to your patch, you can interactively rebase
+   commit(s) to fix review issues.  In your development repo::
+
+     $ git fetch --all
+     $ git rebase --ignore-whitespace upstream/master
+
+   The ``--ignore-whitespace`` option stops ``git apply`` (called by rebase)
+   from changing any whitespace. Continuing::
+
+     $ git rebase -i <offending-commit-id>^
+
+   In the interactive rebase editor, replace ``pick`` with ``edit`` to select
+   a specific commit (if there's more than one in your pull request), or
+   remove the line to delete a commit entirely.  Then edit files to fix the
+   issues in the review.
+
+   As before, inspect and test your changes. When ready, continue the
+   patch submission::
+
+     $ git add [file(s)]
+     $ git rebase --continue
+
+   Update commit comment if needed, and continue::
+
+     $ git push --force origin fix_comment_typo
+
+   By force pushing your update, your original pull request will be updated
+   with your changes so you won't need to resubmit the pull request.
+
+
+Commit Guidelines
+*****************
+
+Changes are submitted as Git commits. Each commit message must contain:
+
+* A short and descriptive subject line that is less than 72 characters,
+  followed by a blank line. The subject line must include a prefix that
+  identifies the subsystem being changed, followed by a colon, and a short
+  title, for example:  ``doc: update wiki references to new site``.
+  (If you're updating an existing file, you can use
+  ``git log <filename>`` to see what developers used as the prefix for
+  previous patches of this file.)
+
+* A change description with your logic or reasoning for the changes, followed
+  by a blank line.
+
+* A Signed-off-by line, ``Signed-off-by: <name> <email>`` typically added
+  automatically by using ``git commit -s``
+
+* If the change address a Jira issue, include a line of the form::
+
+      Jira: ZEP-xxx
+
+
+All changes and topics sent to GitHub must be well-formed, as described above.
+
+Commit Message Body
+===================
+
+When editing the commit message, please briefly explain what your change
+does and why it's needed. A change summary of ``"Fixes stuff"`` will be rejected. An
+empty change summary is only acceptable for trivial changes fully described by
+the commit title (e.g., ``doc: fix misspellings in CONTRIBUTING doc``)
+
+The description body of the commit message must include:
+
+* **what** the change does,
+* **why** you chose that approach,
+* **what** assumptions were made, and
+* **how** you know it works -- for example, which tests you ran.
+
+For examples of accepted commit messages, you can refer to the Zephyr GitHub
+`changelog <https://github.com/zephyrproject-rtos/zephyr/commits/master>`__.
+
+Other Commit Expectations
+=========================
+
+* Commits must build cleanly when applied on top of each other, thus avoiding
+  breaking bisectability.
+
+* Commits must pass the *scripts/checkpatch.pl* requirements.
+
+* Each commit must address a single identifiable issue and must be
+  logically self-contained. Unrelated changes should be submitted as
+  separate commits.
+
+* You may submit pull request RFCs (requests for comments) to send work
+  proposals, progress snapshots of your work, or to get early feedback on
+  features or changes that will affect multiple areas in the code base.
+
+Identifying Contribution Origin
+===============================
+
+When adding a new file to the tree, it is important to detail the source of
+origin on the file, provide attributions, and detail the intended usage. In
+cases where the file is an original to Zephyr, the commit message should
+include the following ("Original" is the assumption if no Origin tag is
+present)::
+
+    Origin: Original
+
+In cases where the file is imported from an external project, the commit
+message shall contain details regarding the original project, the location of
+the project, the SHA-id of the origin commit for the file, the intended
+purpose, and if the file will be maintained by the Zephyr project,
+(whether or not the Zephyr project will contain a localized branch or if
+it is a downstream copy).
+
+For example, a copy of a locally maintained import::
+
+    Origin: Contiki OS
+    License: BSD 3-Clause
+    URL: http://www.contiki-os.org/
+    commit: 853207acfdc6549b10eb3e44504b1a75ae1ad63a
+    Purpose: Introduction of networking stack.
+    Maintained-by: Zephyr
+
+For example, a copy of an externally maintained import::
+
+    Origin: Tiny Crypt
+    License: BSD 3-Clause
+    URL: https://github.com/01org/tinycrypt
+    commit: 08ded7f21529c39e5133688ffb93a9d0c94e5c6e
+    Purpose: Introduction of TinyCrypt
+    Maintained-by: External

Kbuild

@@ -0,0 +1,56 @@
+# vim: filetype=make
+
+define filechk_configs.c
+	(echo "/* file is auto-generated, do not modify ! */"; \
+	echo; \
+	echo "#include <toolchain.h>"; \
+	echo; \
+	echo "GEN_ABS_SYM_BEGIN (_ConfigAbsSyms)"; \
+	echo; \
+	cat $(CURDIR)/include/generated/autoconf.h | sed \
+	's/".*"/1/' | awk  \
+	'/#define/{printf "GEN_ABSOLUTE_SYM(%s, %s);\n", $$2, $$3}'; \
+	echo; \
+	echo "GEN_ABS_SYM_END";)
+endef
+
+misc/generated/configs.c: include/config/auto.conf FORCE
+	$(call filechk,configs.c)
+
+targets := misc/generated/configs.c
+targets += include/generated/offsets.h
+
+
+always := misc/generated/configs.c
+always += include/generated/offsets.h
+
+define rule_cc_o_c_1
+	$(call echo-cmd,cc_o_c_1) $(cmd_cc_o_c_1);
+endef
+
+cmd_cc_o_c_1 = $(CC) $(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS) $(ZEPHYRINCLUDE) -c -o $@ $<
+
+arch/$(ARCH)/core/offsets/offsets.o: arch/$(ARCH)/core/offsets/offsets.c $(KCONFIG_CONFIG) \
+				include/generated/generated_dts_board.h
+	$(Q)mkdir -p $(dir $@)
+	$(call if_changed,cc_o_c_1)
+
+
+define offsetchk
+	$(Q)set -e;                                                \
+	$(kecho) '  CHK     $@';                                   \
+	mkdir -p $(dir $@);                                        \
+	$(srctree)/scripts/gen_offset_header.py -i $(1) -o $@.tmp; \
+	if [ -r $@ ] && cmp -s $@ $@.tmp; then                     \
+	rm -f $@.tmp;                                              \
+	else                                                       \
+	$(kecho) '  UPD     $@';                                   \
+	mv -f $@.tmp $@;                                           \
+	fi
+endef
+
+include/generated/offsets.h: arch/$(ARCH)/core/offsets/offsets.o \
+			     include/config/auto.conf FORCE
+	$(call offsetchk,arch/$(ARCH)/core/offsets/offsets.o)
+
+

Kconfig

@@ -1,8 +1,10 @@
-# General configuration options
+# Kconfig - general configuration options
 
+#
 # Copyright (c) 2014-2015 Wind River Systems, Inc.
+#
 # SPDX-License-Identifier: Apache-2.0
-
+#
 mainmenu "Zephyr Kernel Configuration"
 
 source "Kconfig.zephyr"

Kconfig.zephyr

@@ -1,590 +1,41 @@
-# General configuration options
+# Kconfig - general configuration options
 
+#
 # Copyright (c) 2014-2015 Wind River Systems, Inc.
 # Copyright (c) 2016 Intel Corporation
+#
 # SPDX-License-Identifier: Apache-2.0
-
-
-# Include Kconfig.defconfig files first so that they can override defaults and
-# other symbol/choice properties by adding extra symbol/choice definitions.
-# After merging all definitions for a symbol/choice, Kconfig picks the first
-# property (e.g. the first default) with a satisfied condition.
 #
-# Shield defaults should have precedence over board defaults, which should have
-# precedence over SoC defaults, so include them in that order.
-#
-# $ARCH and $BOARD_DIR will be glob patterns when building documentation.
-source "$(KCONFIG_BINARY_DIR)/Kconfig.shield.defconfig"
-source "$(BOARD_DIR)/Kconfig.defconfig"
-source "$(KCONFIG_BINARY_DIR)/Kconfig.soc.defconfig"
+config KERNELVERSION
+	string
+	option env="KERNELVERSION"
 
-menu "Modules"
-
-source "modules/Kconfig"
-
-endmenu
-
-source "boards/Kconfig"
-source "soc/Kconfig"
 source "arch/Kconfig"
+
 source "kernel/Kconfig"
+
 source "dts/Kconfig"
+
 source "drivers/Kconfig"
+
+source "net/Kconfig"
+
+source "misc/Kconfig"
+
 source "lib/Kconfig"
+
 source "subsys/Kconfig"
 
-osource "$(TOOLCHAIN_KCONFIG_DIR)/Kconfig"
-
-menu "Build and Link Features"
-
-menu "Linker Options"
-
-choice
-	prompt "Linker Orphan Section Handling"
-	default LINKER_ORPHAN_SECTION_WARN
-
-config LINKER_ORPHAN_SECTION_PLACE
-	bool "Place"
-	help
-	  Linker puts orphan sections in place without warnings
-	  or errors.
-
-config LINKER_ORPHAN_SECTION_WARN
-	bool "Warn"
-	help
-	  Linker places the orphan sections in output and issues
-	  warning about those sections.
-
-config LINKER_ORPHAN_SECTION_ERROR
-	bool "Error"
-	help
-	  Linker exits with error when an orphan section is found.
-
-endchoice
-
-config HAS_FLASH_LOAD_OFFSET
-	bool
-	help
-	  This option is selected by targets having a FLASH_LOAD_OFFSET
-	  and FLASH_LOAD_SIZE.
-
-if HAS_FLASH_LOAD_OFFSET
-
-config USE_DT_CODE_PARTITION
-	bool "Link application into /chosen/zephyr,code-partition from devicetree"
-	help
-	  When enabled, the application will be linked into the flash partition
-	  selected by the zephyr,code-partition property in /chosen in devicetree.
-	  When this is disabled, the flash load offset and size can be set manually
-	  below.
-
-# Workaround for not being able to have commas in macro arguments
-DT_CHOSEN_Z_CODE_PARTITION := zephyr,code-partition
-
-config FLASH_LOAD_OFFSET
-	# Only user-configurable when USE_DT_CODE_PARTITION is disabled
-	hex "Kernel load offset" if !USE_DT_CODE_PARTITION
-	default $(dt_chosen_reg_addr_hex,$(DT_CHOSEN_Z_CODE_PARTITION)) if USE_DT_CODE_PARTITION
-	default 0
-	help
-	  This option specifies the byte offset from the beginning of flash that
-	  the kernel should be loaded into. Changing this value from zero will
-	  affect the Zephyr image's link, and will decrease the total amount of
-	  flash available for use by application code.
-
-	  If unsure, leave at the default value 0.
-
-config FLASH_LOAD_SIZE
-	# Only user-configurable when USE_DT_CODE_PARTITION is disabled
-	hex "Kernel load size" if !USE_DT_CODE_PARTITION
-	default $(dt_chosen_reg_size_hex,$(DT_CHOSEN_Z_CODE_PARTITION)) if USE_DT_CODE_PARTITION
-	default 0
-	help
-	  If non-zero, this option specifies the size, in bytes, of the flash
-	  area that the Zephyr image will be allowed to occupy.  If zero, the
-	  image will be able to occupy from the FLASH_LOAD_OFFSET to the end of
-	  the device.
-
-	  If unsure, leave at the default value 0.
-
-endif # HAS_FLASH_LOAD_OFFSET
-
-config ROM_START_OFFSET
-	hex
-	prompt "ROM start offset" if !BOOTLOADER_MCUBOOT
-	default 0x200 if BOOTLOADER_MCUBOOT
-	default 0
-	help
-	  If the application is built for chain-loading by a bootloader this
-	  variable is required to be set to value that leaves sufficient
-	  space between the beginning of the image and the start of the first
-	  section to store an image header or any other metadata.
-	  In the particular case of the MCUboot bootloader this reserves enough
-	  space to store the image header, which should also meet vector table
-	  alignment requirements on most ARM targets, although some targets
-	  may require smaller or larger values.
-
-config HAVE_CUSTOM_LINKER_SCRIPT
-	bool "Custom linker scripts provided"
-	help
-	  Set this option if you have a custom linker script which needed to
-	  be define in CUSTOM_LINKER_SCRIPT.
-
-config CUSTOM_LINKER_SCRIPT
-	string "Path to custom linker script"
-	depends on HAVE_CUSTOM_LINKER_SCRIPT
-	help
-	  Path to the linker script to be used instead of the one define by the
-	  board.
-
-	  The linker script must be based on a version provided by Zephyr since
-	  the kernel can expect a certain layout/certain regions.
-
-	  This is useful when an application needs to add sections into the
-	  linker script and avoid having to change the script provided by
-	  Zephyr.
-
-config KERNEL_ENTRY
-	string "Kernel entry symbol"
-	default "__start"
-	help
-	  Code entry symbol, to be set at linking phase.
-
-config LINKER_SORT_BY_ALIGNMENT
-	bool "Sort input sections by alignment"
-	default y
-	help
-	  This turns on the linker flag to sort sections by alignment
-	  in decreasing size of symbols. This helps to minimize
-	  padding between symbols.
-
-config SRAM_VECTOR_TABLE
-	bool "Place the vector table in SRAM instead of flash"
-	help
-	  The option specifies that the vector table should be placed at the
-	  start of SRAM instead of the start of flash.
-
-config HAS_SRAM_OFFSET
-	bool
-	help
-	  This option is selected by targets that require SRAM_OFFSET.
-
-config SRAM_OFFSET
-	hex "Kernel SRAM offset" if HAS_SRAM_OFFSET
-	default 0
-	help
-	  This option specifies the byte offset from the beginning of SRAM
-	  where the kernel begins. Changing this value from zero will affect
-	  the Zephyr image's link, and will decrease the total amount of
-	  SRAM available for use by application code.
-
-	  If unsure, leave at the default value 0.
-
-endmenu
-
-menu "Compiler Options"
-
-config CODING_GUIDELINE_CHECK
-	bool "Enforce coding guideline rules"
-	help
-	  Use available compiler flags to check coding guideline rules during
-	  the build.
-
-config NATIVE_APPLICATION
-	bool "Build as a native host application"
-	help
-	  Build as a native application that can run on the host and using
-	  resources and libraries provided by the host.
-
-choice
-	prompt "Optimization level"
-	default NO_OPTIMIZATIONS    if COVERAGE
-	default DEBUG_OPTIMIZATIONS if DEBUG
-	default SIZE_OPTIMIZATIONS
-	help
-	  Note that these flags shall only control the compiler
-	  optimization level, and that no extra debug code shall be
-	  conditionally compiled based on them.
-
-config SIZE_OPTIMIZATIONS
-	bool "Optimize for size"
-	help
-	  Compiler optimizations will be set to -Os independently of other
-	  options.
-
-config SPEED_OPTIMIZATIONS
-	bool "Optimize for speed"
-	help
-	  Compiler optimizations will be set to -O2 independently of other
-	  options.
-
-config DEBUG_OPTIMIZATIONS
-	bool "Optimize debugging experience"
-	help
-	  Compiler optimizations will be set to -Og independently of other
-	  options.
-
-config NO_OPTIMIZATIONS
-	bool "Optimize nothing"
-	help
-	  Compiler optimizations will be set to -O0 independently of other
-	  options.
-
-endchoice
-
-config COMPILER_COLOR_DIAGNOSTICS
-	bool "Enable colored diganostics"
-	default y
-	help
-	  Compiler diagnostic messages are colorized.
-
-config COMPILER_OPT
-	string "Custom compiler options"
-	help
-	  This option is a free-form string that is passed to the compiler
-	  when building all parts of a project (i.e. kernel).
-	  The compiler options specified by this string supplement the
-	  predefined set of compiler supplied by the build system,
-	  and can be used to change compiler optimization, warning and error
-	  messages, and so on.
-
-endmenu
-
-choice
-	prompt "Error checking behavior for CHECK macro"
-	default RUNTIME_ERROR_CHECKS
-
-config ASSERT_ON_ERRORS
-	bool "Assert on all errors"
-	help
-	  Assert on errors covered with the CHECK macro.
-
-config NO_RUNTIME_CHECKS
-	bool "No runtime error checks"
-	help
-	  Do not do any runtime checks or asserts when using the CHECK macro.
-
-config RUNTIME_ERROR_CHECKS
-	bool "Enable runtime error checks"
-	help
-	  Always perform runtime checks covered with the CHECK macro. This
-	  option is the default and the only option used during testing.
-
-endchoice
-
-menu "Build Options"
-
-config KERNEL_BIN_NAME
-	string "The kernel binary name"
-	default "zephyr"
-	help
-	  This option sets the name of the generated kernel binary.
-
-config OUTPUT_STAT
-	bool "Create a statistics file"
-	default y
-	help
-	  Create a stat file using readelf -e <elf>
-
-config OUTPUT_DISASSEMBLY
-	bool "Create a disassembly file"
-	default y
-	help
-	  Create an .lst file with the assembly listing of the firmware.
-
-config OUTPUT_DISASSEMBLE_ALL
-	bool "Disassemble all sections with source. Fill zeros."
-	default n
-	depends on OUTPUT_DISASSEMBLY
-	help
-	  The .lst file will contain complete disassembly of the firmware
-	  not just those expected to contain instructions including zeros
-
-config OUTPUT_PRINT_MEMORY_USAGE
-	bool "Print memory usage to stdout"
-	default y
-	help
-	  If the toolchain supports it, this option will pass
-	  --print-memory-region to the linker when it is doing it's first
-	  linker pass. Note that the memory regions are symbolic concepts
-	  defined by the linker scripts and do not necessarily map
-	  directly to the real physical address space. Take also note that
-	  some platforms do two passes of the linker so the results do not
-	  match exactly to the final elf file. See also rom_report,
-	  ram_report and
-	  https://sourceware.org/binutils/docs/ld/MEMORY.html
-
-config CLEANUP_INTERMEDIATE_FILES
-	bool "Remove all intermediate files"
-	help
-	  Delete intermediate files to save space and cleanup clutter resulting
-	  from the build process.
-
-config BUILD_NO_GAP_FILL
-	bool "Don't fill gaps in generated hex/bin/s19 files."
-
-config BUILD_OUTPUT_HEX
-	bool "Build a binary in HEX format"
-	help
-	  Build an Intel HEX binary zephyr/zephyr.hex in the build directory.
-	  The name of this file can be customized with CONFIG_KERNEL_BIN_NAME.
-
-config BUILD_OUTPUT_BIN
-	bool "Build a binary in BIN format"
-	default y
-	help
-	  Build a "raw" binary zephyr/zephyr.bin in the build directory.
-	  The name of this file can be customized with CONFIG_KERNEL_BIN_NAME.
-
-config BUILD_OUTPUT_EFI
-	bool "Build as an EFI application"
-	default n
-	depends on X86_64
-	help
-	  Build as an EFI application.
-
-	  This works by creating a "zephyr.efi" EFI binary containing a zephyr
-	  image extracted from a built zephyr.elf file.  EFI applications are
-	  relocatable, and cannot be placed at specific locations in memory.
-	  Instead, the stub code will copy the embedded zephyr sections to the
-	  appropriate locations at startup, clear any zero-filled (BSS, etc...)
-	  areas, then jump into the 64 bit entry point.
-
-config BUILD_OUTPUT_EXE
-	bool "Build a binary in ELF format with .exe extension"
-	help
-	  Build an ELF binary that can run in the host system at
-	  zephyr/zephyr.exe in the build directory.
-	  The name of this file can be customized with CONFIG_KERNEL_BIN_NAME.
-
-config BUILD_OUTPUT_S19
-	bool "Build a binary in S19 format"
-	help
-	  Build an S19 binary zephyr/zephyr.s19 in the build directory.
-	  The name of this file can be customized with CONFIG_KERNEL_BIN_NAME.
-
-config BUILD_OUTPUT_UF2
-	bool "Build a binary in UF2 format"
-	depends on BUILD_OUTPUT_BIN
-	help
-	  Build a UF2 binary zephyr/zephyr.uf2 in the build directory.
-	  The name of this file can be customized with CONFIG_KERNEL_BIN_NAME.
-
-if BUILD_OUTPUT_UF2
-
-config BUILD_OUTPUT_UF2_FAMILY_ID
-	string "UF2 device family ID"
-	default "0x1c5f21b0" if SOC_ESP32
-	default "0xada52840" if SOC_NRF52840_QIAA
-	default "0x4fb2d5bd" if SOC_SERIES_IMX_RT
-	default "0x2abc77ec" if SOC_SERIES_LPC55XXX
-	default "0x68ed2b88" if SOC_SERIES_SAMD21
-	default "0x55114460" if SOC_SERIES_SAMD51
-	default "0x647824b6" if SOC_SERIES_STM32F0X
-	default "0x5d1a0a2e" if SOC_SERIES_STM32F2X
-	default "0x6b846188" if SOC_SERIES_STM32F3X
-	default "0x53b80f00" if SOC_SERIES_STM32F7X
-	default "0x300f5633" if SOC_SERIES_STM32G0X
-	default "0x4c71240a" if SOC_SERIES_STM32G4X
-	default "0x6db66082" if SOC_SERIES_STM32H7X
-	default "0x202e3a91" if SOC_SERIES_STM32L0X
-	default "0x1e1f432d" if SOC_SERIES_STM32L1X
-	default "0x00ff6919" if SOC_SERIES_STM32L4X
-	default "0x04240bdf" if SOC_SERIES_STM32L5X
-	default "0x70d16653" if SOC_SERIES_STM32WBX
-	default "0x5ee21072" if SOC_STM32F103XE
-	default "0x57755a57" if SOC_STM32F401XC || SOC_STM32F401XE
-	default "0x6d0922fa" if SOC_STM32F407XE
-	default "0x8fb060fe" if SOC_STM32F407XG
-	help
-	  UF2 bootloaders only accept UF2 files with a matching family ID.
-	  This can be either a hex, e.g. 0x68ed2b88, or well-known family
-	  name string. If the SoC in use is known by UF2, the Family ID will
-	  be pre-filled with the known value.
-
-endif # BUILD_OUTPUT_UF2
-
-config BUILD_OUTPUT_STRIPPED
-	bool "Build a stripped binary"
-	help
-	  Build a stripped binary zephyr/zephyr.strip in the build directory.
-	  The name of this file can be customized with CONFIG_KERNEL_BIN_NAME.
-
-config APPLICATION_DEFINED_SYSCALL
-	bool "Scan application folder for any syscall definition"
-	help
-	  Scan additional folders inside application source folder
-	  for application defined syscalls.
-
-config MAKEFILE_EXPORTS
-	bool "Generate build metadata files named Makefile.exports"
-	help
-	  Generates a file with build information that can be read by
-	  third party Makefile-based build systems.
-
-endmenu
-endmenu
-
-
-menu "Boot Options"
-
-config IS_BOOTLOADER
-	bool "Act as a bootloader"
-	depends on XIP
-	depends on ARM
-	help
-	  This option indicates that Zephyr will act as a bootloader to execute
-	  a separate Zephyr image payload.
-
-config BOOTLOADER_SRAM_SIZE
-	int "SRAM reserved for bootloader"
-	default 16
-	depends on !XIP || IS_BOOTLOADER
-	depends on ARM || XTENSA
-	help
-	  This option specifies the amount of SRAM (measure in kB) reserved for
-	  a bootloader image, when either:
-	  - the Zephyr image itself is to act as the bootloader, or
-	  - Zephyr is a !XIP image, which implicitly assumes existence of a
-	  bootloader that loads the Zephyr !XIP image onto SRAM.
-
-config MCUBOOT
-	bool
-	help
-	  Hidden option used to indicate that the current image is MCUBoot
-
-config BOOTLOADER_MCUBOOT
-	bool "MCUboot bootloader support"
-	select USE_DT_CODE_PARTITION
-	imply INIT_ARCH_HW_AT_BOOT if ARCH_SUPPORTS_ARCH_HW_INIT
-	depends on !MCUBOOT
-	help
-	  This option signifies that the target uses MCUboot as a bootloader,
-	  or in other words that the image is to be chain-loaded by MCUboot.
-	  This sets several required build system and Device Tree options in
-	  order for the image generated to be bootable using the MCUboot open
-	  source bootloader. Currently this includes:
-
-	    * Setting ROM_START_OFFSET to a default value that allows space
-	      for the MCUboot image header
-	    * Activating SW_VECTOR_RELAY_CLIENT on Cortex-M0
-	      (or Armv8-M baseline) targets with no built-in vector relocation
-	      mechanisms
-
-	  By default, this option instructs Zephyr to initialize the core
-	  architecture HW registers during boot, when this is supported by
-	  the application. This removes the need by MCUboot to reset
-	  the core registers' state itself.
-
-if BOOTLOADER_MCUBOOT
-
-config MCUBOOT_SIGNATURE_KEY_FILE
-	string "Path to the mcuboot signing key file"
-	default ""
-	help
-	  The file contains a key pair whose public half is verified
-	  by your target's MCUboot image. The file is in PEM format.
-
-	  If set to a non-empty value, the build system tries to
-	  sign the final binaries using a 'west sign -t imgtool' command.
-	  The signed binaries are placed in the build directory
-	  at zephyr/zephyr.signed.bin and zephyr/zephyr.signed.hex.
-
-	  The file names can be customized with CONFIG_KERNEL_BIN_NAME.
-	  The existence of bin and hex files depends on CONFIG_BUILD_OUTPUT_BIN
-	  and CONFIG_BUILD_OUTPUT_HEX.
-
-	  This option should contain an absolute path to the same file
-	  as the BOOT_SIGNATURE_KEY_FILE option in your MCUboot
-	  .config. (The MCUboot config option is used for the MCUboot
-	  bootloader image; this option is for your application which
-	  is to be loaded by MCUboot. The MCUboot config option can be
-	  a relative path from the MCUboot repository root; this option's
-	  behavior is undefined for relative paths.)
-
-	  If left empty, you must sign the Zephyr binaries manually.
-
-config MCUBOOT_EXTRA_IMGTOOL_ARGS
-	string "Extra arguments to pass to imgtool"
-	default ""
-	help
-	  If CONFIG_MCUBOOT_SIGNATURE_KEY_FILE is a non-empty string,
-	  you can use this option to pass extra options to imgtool.
-	  For example, you could set this to "--version 1.2".
-
-config MCUBOOT_GENERATE_CONFIRMED_IMAGE
-	bool "Also generate a padded, confirmed image"
-	help
-	  The signed, padded, and confirmed binaries are placed in the build
-	  directory at zephyr/zephyr.signed.confirmed.bin and
-	  zephyr/zephyr.signed.confirmed.hex.
-
-	  The file names can be customized with CONFIG_KERNEL_BIN_NAME.
-	  The existence of bin and hex files depends on CONFIG_BUILD_OUTPUT_BIN
-	  and CONFIG_BUILD_OUTPUT_HEX.
-
-endif # BOOTLOADER_MCUBOOT
-
-config BOOTLOADER_ESP_IDF
-	bool "ESP-IDF bootloader support"
-	depends on SOC_ESP32
-	help
-	  This option will trigger the compilation of the ESP-IDF bootloader
-	  inside the build folder.
-	  At flash time, the bootloader will be flashed with the zephyr image
-
-config BOOTLOADER_BOSSA
-	bool "BOSSA bootloader support"
-	select USE_DT_CODE_PARTITION
-	depends on SOC_FAMILY_SAM0
-
-	help
-	  Signifies that the target uses a BOSSA compatible bootloader.  If CDC
-	  ACM USB support is also enabled then the board will reboot into the
-	  bootloader automatically when bossac is run.
-
-config BOOTLOADER_BOSSA_DEVICE_NAME
-	string "BOSSA CDC ACM device name"
-	depends on BOOTLOADER_BOSSA && CDC_ACM_DTE_RATE_CALLBACK_SUPPORT
-	default "CDC_ACM_0"
-	help
-	  Sets the CDC ACM port to watch for reboot commands.
-
-choice
-	prompt "BOSSA bootloader variant"
-	depends on BOOTLOADER_BOSSA
-
-config BOOTLOADER_BOSSA_ARDUINO
-	bool "Arduino"
-	help
-	  Select the Arduino variant of the BOSSA bootloader.  Uses 0x07738135
-	  as the magic value to enter the bootloader.
-
-config BOOTLOADER_BOSSA_ADAFRUIT_UF2
-	bool "Adafruit UF2"
-	help
-	  Select the Adafruit UF2 variant of the BOSSA bootloader.  Uses
-	  0xf01669ef as the magic value to enter the bootloader.
-
-endchoice
-
-config MISRA_SANE
-	bool "MISRA standards compliance features"
-	help
-	  Causes the source code to build in "MISRA" mode, which
-	  disallows some otherwise-permitted features of the C
-	  standard for safety reasons.  Specifically variable length
-	  arrays are not permitted (and gcc will enforce this).
-
-endmenu
-
-menu "Compatibility"
-
-config COMPAT_INCLUDES
-	bool "Suppress warnings when using header shims"
-	default y
-	help
-	  Suppress any warnings from the pre-processor when including
-	  deprecated header files.
-
-endmenu
+source "ext/Kconfig"
+
+source "tests/Kconfig"
+
+#
+# The following are for Kconfig files for default values only.
+# These should be parsed at the end.
+#
+# Board defaults should be parsed after SoC defaults
+# because board usually overrides SoC values.
+#
+source "arch/*/soc/*/Kconfig.defconfig"
+source "boards/*/*/Kconfig.defconfig"

MAINTAINERS

@@ -0,0 +1,493 @@
+Originally from the Linux Kernel.
+# Licensed under the terms of the GNU GPL License version 2
+
+Descriptions of section entries:
+
+	P: Person (obsolete)
+	M: Mail patches to: FullName <address@domain>
+	R: Designated reviewer: FullName <address@domain>
+	   These reviewers should be CCed on patches.
+	L: Mailing list that is relevant to this area
+	W: Web-page with status/info
+	Q: Patchwork web based patch tracking system site
+	T: SCM tree type and location.
+	   Type is one of: git, hg, quilt, stgit, topgit
+	S: Status, one of the following:
+	   Supported:	Someone is actually paid to look after this.
+	   Maintained:	Someone actually looks after it.
+	   Odd Fixes:	It has a maintainer but they don't have time to do
+			much other than throw the odd patch in. See below..
+	   Orphan:	No current maintainer [but maybe you could take the
+			role as you write your new code].
+	   Obsolete:	Old code. Something tagged obsolete generally means
+			it has been replaced by a better system and you
+			should be using that.
+	F: Files and directories with wildcard patterns.
+	   A trailing slash includes all files and subdirectory files.
+	   F:	drivers/net/	all files in and below drivers/net
+	   F:	drivers/net/*	all files in drivers/net, but not below
+	   F:	*/net/*		all files in "any top level directory"/net
+	   One pattern per line.  Multiple F: lines acceptable.
+	N: Files and directories with regex patterns.
+	   N:	[^a-z]tegra	all files whose path contains the word tegra
+	   One pattern per line.  Multiple N: lines acceptable.
+	   scripts/get_maintainer.pl has different behavior for files that
+	   match F: pattern and matches of N: patterns.  By default,
+	   get_maintainer will not look at git log history when an F: pattern
+	   match occurs.  When an N: match occurs, git log history is used
+	   to also notify the people that have git commit signatures.
+	X: Files and directories that are NOT maintained, same rules as F:
+	   Files exclusions are tested before file matches.
+	   Can be useful for excluding a specific subdirectory, for instance:
+	   F:	net/
+	   X:	net/ipv6/
+	   matches all files in and below net excluding net/ipv6/
+	K: Keyword perl extended regex pattern to match content in a
+	   patch or file.  For instance:
+	   K: of_get_profile
+	      matches patches or files that contain "of_get_profile"
+	   K: \b(printk|pr_(info|err))\b
+	      matches patches or files that contain one or more of the words
+	      printk, pr_info or pr_err
+	   One regex pattern per line.  Multiple K: lines acceptable.
+
+Note: For the hard of thinking, this list is meant to remain in alphabetical
+order. If you could add yourselves to it in alphabetical order that would be
+so much easier [Ed]
+
+Maintainers List (try to look for most precise areas first)
+
+		-----------------------------------
+
+ARC ARCHITECTURE
+M:	Ruud Derwig <Ruud.Derwig@synopsys.com>
+M:	Chuck Jordan <cjordan@synopsys.com>
+S:	Supported
+F:	arch/arc/
+F:	include/arch/arc/
+F:	boards/arc/
+
+ARM ARCHITECTURE
+M:	Maureen Helm <maureen.helm@nxp.com>
+M:	Kumar Gala <kumar.gala@linaro.org>
+S:	Supported
+F:	arch/arm/
+F:	include/arch/arm/
+F:	boards/arm/
+
+ARM CORTEX MICROCONTROLLER SOFTWARE INTERFACE STANDARD (CMSIS)
+M:	Maureen Helm <maureen.helm@nxp.com>
+M:	Kumar Gala <kumar.gala@linaro.org>
+S:	Supported
+F:	ext/hal/cmsis/
+
+BOARDS/ARC - ARDUINO 101 SSS
+M:      Anas Nashif <anas.nashif@intel.com>
+S:	Supported
+F:	boards/arc/arduino_101_sss/
+
+BOARDS/ARC - EM Starterkit
+M:	Chuck Jordan <cjordan@synopsys.com>
+S:	Supported
+F:	boards/arc/em_starterkit/
+
+BOARDS/ARC - QUARK SE C1000 SS Devboard
+M:      Anas Nashif <anas.nashif@intel.com>
+S:	Supported
+F:	boards/arc/quark_se_c1000_ss_devboard/
+
+BOARDS/ARM - 96Boards CARBON
+M:	Amit Kucheria <amit.kucheria@linaro.org>
+M:	Ricardo Salveti <ricardo.salveti@linaro.org>
+S:	Supported
+F:	boards/arm/96b_carbon/
+
+BOARDS/ARM - 96Boards NITROGEN
+M:	Amit Kucheria <amit.kucheria@linaro.org>
+S:	Supported
+F:	boards/arm/96b_nitrogen/
+
+BOARDS/ARM - ARDUINO 101 BLE
+M:	Johan Hedberg <johan.hedberg@intel.com>
+S:	Supported
+F:	boards/arm/arduino_101_ble/
+
+BOARDS/ARM - CC32XX LAUNCHXL
+M:      Gil Pitney <gil.pitney@linaro.org>
+S:      Supported
+F:      boards/arm/cc3220sf_launchxl/
+
+BOARDS/ARM - NXP FRDM-K64F
+M:	Maureen Helm <maureen.helm@nxp.com>
+S:	Supported
+F:	boards/arm/frdm_k64f/
+
+BOARDS/ARM - NXP FRDM-KW41Z
+M:	Maureen Helm <maureen.helm@nxp.com>
+S:	Supported
+F:	boards/arm/frdm_kw41z/
+
+BOARDS/ARM - NXP Hexiwear
+M:	Maureen Helm <maureen.helm@nxp.com>
+S:	Supported
+F:	boards/arm/hexiwear_k64/
+
+BOARDS/ARM - NORDIC NRF51 REDBEAR BLENANO
+M:	Ricardo Salveti <ricardo.salveti@linaro.org>
+S:	Supported
+F:	boards/arm/nrf51_blenano/
+
+BOARDS/ARM - NORDIC NRF52 PCA10040
+M:	Carles Cufi <carles.cufi@nordicsemi.no>
+S:	Supported
+F:	boards/arm/nrf52_pca10040/
+
+BOARDS/ARM - NUCLEO-64 F401RE Devboard
+M:	Amit Kucheria <amit.kucheria@linaro.org>
+M:	Ricardo Salveti <ricardo.salveti@linaro.org>
+S:	Supported
+F:	boards/arm/nucleo_f401re/
+
+BOARDS/ARM - ARM LTD V2M Beetle
+M:	Vincenzo Frascino <vincenzo.frascino@linaro.org>
+S:	Supported
+F:	boards/arm/v2m_beetle/
+
+BOARDS/NIOS2 - ALTERA MAX10
+M:	Andrew Boie <andrew.p.boie@intel.com>
+S:	Supported
+F:	boards/nios2/altera_max10/
+
+BOARDS/X86 - ARDUINO 101
+M:      Anas Nashif <anas.nashif@intel.com>
+S:	Supported
+F:	boards/x86/arduino_101/
+
+BOARDS/X86 - Galileo
+M:      Anas Nashif <anas.nashif@intel.com>
+S:	Supported
+F:	boards/x86/galileo/
+
+BOARDS/X86 - QUARK D2000 Devboard
+M:      Anas Nashif <anas.nashif@intel.com>
+S:	Supported
+F:	boards/x86/quark_d2000_crb/
+
+BOARDS/X86 - QUARK SE C1000 Devboard
+M:      Anas Nashif <anas.nashif@intel.com>
+S:	Supported
+F:	boards/x86/quark_se_c1000_devboard/
+
+BLUETOOTH
+M:	Johan Hedberg <johan.hedberg@intel.com>
+M:	Luiz Augusto von Dentz <luiz.dentz@gmail.com>
+M:	Szymon Janc <szymon.janc@gmail.com>
+S:	Supported
+W:	https://www.zephyrproject.org/doc/subsystems/bluetooth/bluetooth.html
+F:	subsys/bluetooth/
+F:	include/bluetooth/
+F:	include/drivers/bluetooth/
+F:	drivers/bluetooth/
+F:	samples/bluetooth/
+F:	tests/bluetooth/
+F:	doc/subsystems/bluetooth/
+
+BLUETOOTH CONTROLLER
+M:	Vinayak Chettimada <vinayak.kariappa.chettimada@nordicsemi.no>
+M:	Carles Cufi <carles.cufi@nordicsemi.no>
+S:	Supported
+F:	subsys/bluetooth/controller/
+
+CC32XX SDK
+M:      Gil Pitney <gil.pitney@linaro.org>
+S:      Supported
+F:      ext/hal/ti/simplelink
+
+CC32XX SOC - TI SIMPLELINK
+M:      Gil Pitney <gil.pitney@linaro.org>
+S:      Supported
+F:      arch/arm/soc/ti_simplelink/cc32xx
+
+DOCUMENTATION
+M:	David Kinder <david.b.kinder@intel.com>
+M:	Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>
+S:	Supported
+F:	doc/
+F:	*.rst
+
+FILE SYSTEM
+M:	Anas Nashif <anas.nashif@intel.com>
+S:	Supported
+F:	ext/fs/
+F:	subsys/fs/
+F:	include/fs/
+F:	include/fs.h
+F:	tests/subsys/fs
+
+FLASH DRIVER
+M:	Anas Nashif <anas.nashif@intel.com>
+S:	Supported
+F:	drivers/flash/
+
+INTERRUPTS
+M:	Andrew Boie <andrew.p.boie@intel.com>
+S:	Supported
+F:	drivers/interrupt_controller/
+F:	arch/arc/core/
+F:	arch/arm/core/
+F:	arch/nios2/core/
+F:	arch/x86/core/
+F:	include/irq.h
+F:	include/arch/x86/arch.h
+F:	include/arch/arm/cortex_m/irq.h
+F:	include/arch/nios2/arch.h
+F:	include/arch/arc/arch.h
+F:	include/arch/arc/v2/irq.h
+F:	include/drivers/loapic.h
+F:	include/drivers/ioapic.h
+F:	include/drivers/mvic.h
+
+KERNEL CORE
+M:	Andrew Boie <andrew.p.boie@intel.com>
+M:	Andy Ross <andrew.j.ross@intel.com>
+S:	Supported
+F:	kernel/
+F:	include/misc/
+F:	include/toolchain/
+F:	include/atomic.h
+F:	include/cache.h
+F:	include/init.h
+F:	include/irq.h
+F:	include/irq_offload.h
+F:	include/kernel_version.h
+F:	include/linker/linker-defs.h
+F:	include/linker/linker-tool-gcc.h
+F:	include/linker/linker-tool.h
+F:	include/linker/section_tags.h
+F:	include/linker/sections.h
+F:	include/shared_irq.h
+F:	include/sw_isr_table.h
+F:	include/sys_clock.h
+F:	include/sys_io.h
+F:	include/toolchain.h
+F:	include/zephyr.h
+F:	include/kernel.h
+F:	tests/kernel/
+
+KNOWN ISSUES
+M:	Anas Nashif <anas.nashif@intel.com>
+M:	Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>
+F:	.known-issues/
+
+LWM2M
+M:	Michael Scott <michael.scott@linaro.org>
+S:	Supported
+F:	subsys/net/lib/lwm2m/
+F:	samples/net/lwm2m_client/
+
+MAINTAINERS
+M:	Anas Nashif <anas.nashif@intel.com>
+M:	Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>
+S:	Supported
+F:	MAINTAINERS
+
+MBEDTLS
+M:	Anas Nashif <anas.nashif@intel.com>
+S:	Supported
+F:	ext/lib/crypto/mbedtls/
+F:	samples/net/mbedtls_sslclient/
+F:	tests/crypto/mbedtls/
+
+MCUXPRESSO SOFTWARE DEVELOPMENT KIT (MCUX)
+M:	Maureen Helm <maureen.helm@nxp.com>
+S:	Supported
+F:	ext/hal/nxp/mcux/
+
+MPS2 - ARM LTD CORTEX-M PROTOTYPING SYSTEM
+M:	Vincenzo Frascino <vincenzo.frascino@linaro.org>
+S:	Supported
+F:	arch/arm/soc/arm/mps2/
+F:	boards/arm/mps2_an385/
+
+NETWORKING
+M:	Jukka Rissanen <jukka.rissanen@linux.intel.com>
+M:	Tomasz Bursztyka <tomasz.bursztyka@linux.intel.com>
+S:	Supported
+W:	https://www.zephyrproject.org/doc/subsystems/networking/networking.html
+F:	subsys/net/ip/
+F:	subsys/net/lib/
+F:	include/net/
+F:	samples/net/
+F:	tests/net/
+F:	tests/net/lib/
+F:	drivers/ethernet/
+F:	drivers/ieee802154/
+F:	drivers/slip/
+
+NETWORK APPLICATIONS
+M:	Jukka Rissanen <jukka.rissanen@linux.intel.com>
+M:	Tomasz Bursztyka <tomasz.bursztyka@linux.intel.com>
+S:	Supported
+F:	subsys/net/lib/dns/
+F:	subsys/net/lib/http/
+F:	subsys/net/lib/mqtt/
+F:	samples/net/dns_resolve/
+F:	samples/net/http_server/
+F:	samples/net/mqtt_publisher/
+F:	tests/net/lib/http_header_fields/
+F:	tests/net/lib/mqtt_packet/
+
+NETWORK BUFFERS
+M:	Johan Hedberg <johan.hedberg@intel.com>
+M:	Jukka Rissanen <jukka.rissanen@linux.intel.com>
+M:	Tomasz Bursztyka <tomasz.bursztyka@linux.intel.com>
+S:	Supported
+W:	https://www.zephyrproject.org/doc/subsystems/networking/buffers.html
+F:	subsys/net/buf.c
+F:	include/net/buf.h
+F:	tests/net/buf/
+
+NIOS II
+M:	Andrew Boie <andrew.p.boie@intel.com>
+S:	Supported
+F:	arch/nios2/
+F:	include/arch/nios2/
+F:	drivers/serial/uart_altera_jtag.c
+F:	drivers/timer/altera_avalon_timer.c
+F:	boards/nios2/
+
+NORDIC MDK
+M:	Carles Cufi <carles.cufi@nordicsemi.no>
+S:	Supported
+F:	ext/hal/nordic/mdk/
+
+POWER MANAGEMENT
+M:	Anas Nashif <anas.nashif@intel.com>
+M:	Youvedeep Singh <youvedeep.singh@intel.com>
+S:	Supported
+F:	arch/x86/core/crt0.S
+F:	include/device.h
+F:	include/init.h
+F:	include/power.h
+F:	kernel/idle.c
+F:	kernel/device.c
+F:	samples/boards/quark_se_c1000/power*/
+
+QMSI
+M:	Anas Nashif <anas.nashif@intel.com>
+S:	Supported
+F:	ext/hal/qmsi/
+
+QMSI DRIVERS
+M:      Anas Nashif <anas.nashif@intel.com>
+S:	Supported
+F:	drivers/*/*qmsi*
+
+QUARK D2000 SOC
+M:      Anas Nashif <anas.nashif@intel.com>
+S:	Supported
+F:	arch/x86/soc/intel_quark/quark_d2000/
+
+QUARK SE C1000 SOC
+M:      Anas Nashif <anas.nashif@intel.com>
+S:	Supported
+F:	arch/x86/soc/intel_quark/quark_se/
+
+QUARK X1000 SOC
+M:      Anas Nashif <anas.nashif@intel.com>
+S:	Supported
+F:	arch/x86/soc/intel_quark/quark_x1000/
+
+SANITYCHECK
+M:	Andrew Boie <andrew.p.boie@intel.com>
+S:	Supported
+F:	scripts/sanitycheck
+F:	scripts/expr_parser.py
+F:	scripts/sanity_chk/
+
+SENSOR DRIVERS
+M:	Bogdan Davidoaia <bogdan.davidoaia@gmail.com>
+M:	Murtaza Alexandru <murtaza.alexandru1995@gmail.com>
+S:	Maintained
+W:	https://www.zephyrproject.org/doc/subsystems/sensor.html
+F:	include/sensor.h
+F:	drivers/sensor/
+F:	samples/sensor/
+
+STM32CUBE SDK
+M:	Erwan Gouriou <erwan.gouriou@linaro.org>
+S:	Supported
+F:	ext/hal/st/stm32cube/
+
+STM32F4X SoC FAMILY and DRIVERS
+M:	Amit Kucheria <amit.kucheria@linaro.org>
+M:	Ricardo Salveti <ricardo.salveti@linaro.org>
+S:	Supported
+F:	arch/arm/soc/st_stm32/stm32f4/
+F:	drivers/pinmux/stm32/
+F:	drivers/gpio/*stm32*
+F:	drivers/clock_control/*stm32f4*
+
+TINYCRYPT
+M:	Constanza Heath <constanza.m.heath@intel.com>
+S:	Supported
+F:	ext/lib/crypto/tinycrypt/
+F:	tests/crypto/
+
+SPI
+M:	Tomasz Bursztyka <tomasz.bursztyka@linux.intel.com>
+S:	Supported
+F:	drivers/spi/
+F:	include/spi.h
+F:	tests/drivers/spi/
+
+USB
+M:	Youvedeep Singh <youvedeep.singh@intel.com>
+M:	Andy Ross <andrew.j.ross@intel.com>
+S:	Supported
+F:	subsys/usb
+F:	drivers/usb
+F:	samples/subsys/usb
+
+X86 ARCH
+M:	Andrew Boie <andrew.p.boie@intel.com>
+M:	Youvedeep Singh <youvedeep.singh@intel.com>
+S:	Supported
+F:	arch/x86/
+F:	include/arch/x86/
+F:	boards/x86/
+
+XTENSA ARCH
+M:	Andrew Boie <andrew.p.boie@intel.com>
+S:	Supported
+F:	arch/xtensa
+F:	include/arch/xtensa/
+F:	boards/xtensa/
+
+RISCV32 ARCH
+M:	Jean-Paul Etienne <fractalclone@gmail.com>
+S:	Supported
+F:	arch/riscv32
+F:	include/arch/riscv32
+F:	boards/riscv32
+F:	drivers/serial/uart_riscv_qemu.c
+F:	drivers/timer/pulpino_timer.c
+F:	drivers/timer/riscv_machine_timer.c
+F:	drivers/gpio/gpio_pulpino.c
+
+ZOAP
+M:	Vinicius Costa Gomes <vinicius.gomes@intel.com>
+S:	Supported
+F:	subsys/net/lib/zoap/
+F:	samples/net/zoap_client/
+F:	samples/net/zoap_server/
+F:	tests/net/lib/zoap/
+
+THE REST
+M:	Anas Nashif <anas.nashif@intel.com>
+M:	Kumar Gala <kumar.gala@linaro.org>
+L:	devel@lists.zephyrproject.com
+T:	git https://github.com/zephyrproject-rtos/zephyr
+S:	Buried alive in reporters
+F:	*
+F:	*/

Makefile.inc

@@ -0,0 +1,148 @@
+# vim: filetype=make
+#
+
+UNAME := $(shell uname)
+ifeq (MINGW, $(findstring MINGW, $(UNAME)))
+DQUOTE = '
+# '
+PROJECT_BASE ?= $(shell sh -c "pwd -W")
+else
+DQUOTE = "
+# "
+PROJECT_BASE ?= $(CURDIR)
+endif
+
+ifdef BOARD
+KBUILD_DEFCONFIG_PATH=$(wildcard $(ZEPHYR_BASE)/boards/*/*/$(BOARD)_defconfig)
+ifeq ($(KBUILD_DEFCONFIG_PATH),)
+$(error Board $(BOARD) not found!)
+endif
+else
+$(error BOARD is not defined!)
+endif
+
+# Choose a default output directory if one wasn't supplied.  Note that
+# PRISTINE_O depends on whether this is default or not.  If building
+# in-tree, we want to remove the whole outdir and not just the BOARD
+# specified (thus "pristine").  Out of tree, we can obviously remove
+# only what we were told to build.
+ifndef O
+PRISTINE_O = outdir
+O = $(PROJECT_BASE)/outdir/$(BOARD)
+else
+PRISTINE_O = $(O)
+endif
+
+# Turn O into an absolute path; we call the main Kbuild with $(MAKE) -C
+# which changes the working directory, relative paths don't work right.
+# Need to create the directory first to make realpath happy
+
+ifneq ($(MAKECMDGOALS),help)
+$(shell mkdir -p $(O))
+override O := $(realpath $(O))
+endif
+
+export ARCH QEMU_EXTRA_FLAGS PROJECT_BASE
+
+override CONF_FILE := $(strip $(subst $(DQUOTE),,$(CONF_FILE)))
+
+SOURCE_DIR ?= $(PROJECT_BASE)/src/
+override SOURCE_DIR := $(realpath $(SOURCE_DIR))
+override SOURCE_DIR := $(subst \,/,$(SOURCE_DIR))
+override SOURCE_DIR_PARENT := $(patsubst %, %/.., $(SOURCE_DIR))
+override SOURCE_DIR_PARENT := $(abspath $(SOURCE_DIR_PARENT))
+override SOURCE_DIR_PARENT := $(subst \,/,$(SOURCE_DIR_PARENT))
+export SOURCE_DIR SOURCE_DIR_PARENT
+
+ifeq ("$(origin V)", "command line")
+  KBUILD_VERBOSE = $(V)
+endif
+ifndef KBUILD_VERBOSE
+  KBUILD_VERBOSE = 0
+endif
+
+ifeq ($(KBUILD_VERBOSE),1)
+  Q =
+  S =
+else
+  Q = @
+  S = -s
+endif
+
+export CFLAGS
+
+zephyrmake	= +$(MAKE) -C $(ZEPHYR_BASE)  O=$(1) \
+			PROJECT=$(PROJECT_BASE) SOURCE_DIR=$(DQUOTE)$(SOURCE_DIR)$(DQUOTE) $(2)
+
+BOARDCONFIG = $(O)/.board_$(BOARD)
+
+DOTCONFIG = $(O)/.config
+
+all: $(DOTCONFIG)
+	$(Q)$(call zephyrmake,$(O),$@)
+
+debug:	$(DOTCONFIG)
+	$(Q)$(call zephyrmake,$(O),$@)
+
+flash: $(DOTCONFIG)
+	$(Q)$(call zephyrmake,$(O),$@)
+
+run: $(DOTCONFIG)
+	$(Q)$(call zephyrmake,$(O),$@)
+
+ifeq ($(MAKECMDGOALS),debugserver)
+ARCH = $(notdir $(subst /$(BOARD),,$(wildcard $(ZEPHYR_BASE)/boards/*/$(BOARD))))
+BOARD_DIR = $(dir $(wildcard $(ZEPHYR_BASE)/boards/*/*/$(BOARD)_defconfig))
+-include $(BOARD_DIR)/Makefile.board
+-include $(ZEPHYR_BASE)/scripts/Makefile.toolchain.$(ZEPHYR_GCC_VARIANT)
+BOARD_NAME = $(BOARD)
+export BOARD_NAME
+endif
+
+debugserver: FORCE
+	$(Q)$(CONFIG_SHELL) $(ZEPHYR_BASE)/scripts/support/$(DEBUG_SCRIPT) debugserver
+
+initconfig: $(DOTCONFIG)
+
+$(BOARDCONFIG):
+	@rm -f $(O)/.board_*
+	@touch $@
+
+ram_report: initconfig
+	$(Q)$(call zephyrmake,$(O),$@)
+
+rom_report: initconfig
+	$(Q)$(call zephyrmake,$(O),$@)
+
+outputexports: initconfig
+	$(Q)$(call zephyrmake,$(O),$@)
+
+dts: initconfig
+	$(Q)$(call zephyrmake,$(O),$@)
+
+config-sanitycheck: dts
+	$(Q)$(call zephyrmake,$(O),$@)
+
+menuconfig: initconfig
+	$(Q)$(call zephyrmake,$(O),$@)
+
+help:
+	$(Q)$(MAKE) -s -C $(ZEPHYR_BASE) $@
+
+# Catch all
+%:
+	$(Q)$(call zephyrmake,$(O),$@)
+
+$(DOTCONFIG): $(BOARDCONFIG) $(KBUILD_DEFCONFIG_PATH) $(CONF_FILE)
+	$(Q)$(CONFIG_SHELL) $(ZEPHYR_BASE)/scripts/kconfig/merge_config.sh \
+		-q -m -O $(O) $(KBUILD_DEFCONFIG_PATH) $(OVERLAY_CONFIG) $(CONF_FILE) \
+			      $(wildcard $(O)/*.conf)
+	$(Q)$(MAKE) $(S) -C $(ZEPHYR_BASE) O=$(O) PROJECT=$(PROJECT_BASE) oldnoconfig
+
+pristine:
+	$(Q)rm -rf $(PRISTINE_O)
+
+PHONY += FORCE initconfig
+FORCE:
+
+.PHONY: $(PHONY)

Makefile.test

@@ -0,0 +1,4 @@
+
+OVERLAY_CONFIG += $(ZEPHYR_BASE)/tests/include/test.config
+
+include ${ZEPHYR_BASE}/Makefile.inc

README.rst

@@ -1,17 +1,10 @@
-.. raw:: html
+Zephyr Project
+##############
 
-   <a href="https://www.zephyrproject.org">
-     <p align="center">
-       <img src="doc/images/Zephyr-Project.png">
-     </p>
-   </a>
+.. raw:: html
 
    <a href="https://bestpractices.coreinfrastructure.org/projects/74"><img
    src="https://bestpractices.coreinfrastructure.org/projects/74/badge"></a>
-   <a href="https://buildkite.com/zephyr/zephyr">
-   <img
-   src="https://badge.buildkite.com/f5bd0dc88306cee17c9b38e78d11bb74a6291e3f40e7d13f31.svg?branch=master"></a>
-
 
 The Zephyr Project is a scalable real-time operating system (RTOS) supporting
 multiple hardware architectures, optimized for resource constrained devices,
@@ -22,66 +15,87 @@ resource-constrained systems: from simple embedded environmental sensors and
 LED wearables to sophisticated smart watches and IoT wireless gateways.
 
 The Zephyr kernel supports multiple architectures, including ARM Cortex-M,
-Intel x86, ARC, Nios II, Tensilica Xtensa, and RISC-V, and a large number of
+Intel x86, ARC, NIOS II, Tensilica Xtensa, and RISC V, and a large number of
 `supported boards`_.
 
 .. below included in doc/introduction/introduction.rst
 
 .. start_include_here
 
-Getting Started
-***************
-
-Welcome to Zephyr! See the `Introduction to Zephyr`_ for a high-level overview,
-and the documentation's `Getting Started Guide`_ to start developing.
-
 Community Support
 *****************
 
-Community support is provided via mailing lists and Slack; see the Resources
-below for details.
+The Zephyr Project Developer Community includes developers from member
+organizations and the general community all joining in the development of
+software within the Zephyr Project. Members contribute and discuss ideas,
+submit bugs and bug fixes, and provide training. They also help those in need
+through the community's forums such as mailing lists and IRC channels. Anyone
+can join the developer community and the community is always willing to help
+its members and the User Community to get the most out of the Zephyr Project.
 
-.. _project-resources:
+Welcome to the Zephyr community!
 
 Resources
 *********
 
-Here's a quick summary of resources to help you find your way around:
+Here's a quick summary of resources to find your way around the Zephyr Project
+support systems:
 
-* **Help**: `Asking for Help Tips`_
-* **Documentation**: http://docs.zephyrproject.org (`Getting Started Guide`_)
-* **Source Code**: https://github.com/zephyrproject-rtos/zephyr is the main
-  repository; https://elixir.bootlin.com/zephyr/latest/source contains a
-  searchable index
-* **Releases**: https://github.com/zephyrproject-rtos/zephyr/releases
-* **Samples and example code**: see `Sample and Demo Code Examples`_
-* **Mailing Lists**: users@lists.zephyrproject.org and
-  devel@lists.zephyrproject.org are the main user and developer mailing lists,
-  respectively. You can join the developer's list and search its archives at
-  `Zephyr Development mailing list`_. The other `Zephyr mailing list
-  subgroups`_ have their own archives and sign-up pages.
-* **Nightly CI Build Status**: https://lists.zephyrproject.org/g/builds
-  The builds@lists.zephyrproject.org mailing list archives the CI
-  (buildkite) nightly build results.
-* **Chat**: Zephyr's Slack workspace is https://zephyrproject.slack.com.  Use
-  this `Slack Invite`_ to register.
-* **Contributing**: see the `Contribution Guide`_
-* **Wiki**: `Zephyr GitHub wiki`_
-* **Issues**: https://github.com/zephyrproject-rtos/zephyr/issues
-* **Security Issues**: Email vulnerabilities@zephyrproject.org to report
-  security issues; also see our `Security`_ documentation. Security issues are
-  tracked separately at https://zephyrprojectsec.atlassian.net.
-* **Zephyr Project Website**: https://zephyrproject.org
+* **Zephyr Project Website**: The https://zephyrproject.org website is the
+  central source of information about the Zephyr Project. On this site, you'll
+  find background and current information about the project as well as all the
+  relevant links to project material.  For a quick start, refer to the
+  `Zephyr Introduction`_ and `Getting Started Guide`_.
 
-.. _Slack Invite: https://tinyurl.com/y5glwylp
-.. _supported boards: http://docs.zephyrproject.org/latest/boards/index.html
-.. _Zephyr Documentation: http://docs.zephyrproject.org
-.. _Introduction to Zephyr: http://docs.zephyrproject.org/latest/introduction/index.html
-.. _Getting Started Guide: http://docs.zephyrproject.org/latest/getting_started/index.html
-.. _Contribution Guide: http://docs.zephyrproject.org/latest/contribute/index.html
+* **Releases**: Source code for Zephyr kernel releases are available at
+  https://zephyrproject.org/downloads. On this page,
+  you'll find release information, and links to download or clone source
+  code from our GitHub repository.  You'll also find links for the Zephyr
+  SDK, a moderated collection of tools and libraries used to develop your
+  applications.
+
+* **Source Code in GitHub**: Zephyr Project source code is maintained on a
+  public GitHub repository at https://github.com/zephyrproject-rtos/zephyr.
+  You'll find information about getting access to the repository and how to
+  contribute to the project in this `Contribution Guide`_ document.
+
+* **Samples Code**: In addition to the kernel source code, there are also
+  many documented `Sample and Demo Code Examples`_ that can help show you
+  how to use Zephyr services and subsystems.
+
+* **Documentation**: Extensive Project technical documentation is developed
+  along with the Zephyr kernel itself, and can be found at
+  https://zephyrproject.org/doc.  Additional documentation is maintained in
+  the `Zephyr GitHub wiki`_.
+
+* **Issue Reporting and Tracking**: Requirements and Issue tracking is done in
+  our JIRA system: https://jira.zephyrproject.org. You can browse through the
+  reported issues and submit issues of your own.
+
+* **Security-related Issue Reporting**: For security-related inquiries or
+  reporting suspected security-related bugs in the Zephyr OS, please
+  send email to vulnerabilities@zephyrproject.org.  We will assess and fix
+  flaws according to our security policy outlined in the Zephyr Project
+  `Security Overview`_.
+
+* **Mailing List**: The `Zephyr Mailing Lists`_ are perhaps the most convenient
+  way to track developer discussions and to ask your own support questions to
+  the Zephyr project community.
+  You can also read through message archives to follow
+  past posts and discussions, a good thing to do to discover more about the
+  Zephyr project.
+
+* **IRC Chatting**: You can chat online with the Zephyr project developer
+  community and other users in our IRC channel #zephyrproject on the
+  freenode.net IRC server. You can use the http://webchat.freenode.net web
+  client or use a client-side application such as pidgin.
+
+
+.. _supported boards: https://www.zephyrproject.org/doc/boards/boards.html
+.. _Zephyr Introduction: https://www.zephyrproject.org/doc/introduction/introducing_zephyr.html
+.. _Getting Started Guide: https://www.zephyrproject.org/doc/getting_started/getting_started.html
+.. _Contribution Guide: https://www.zephyrproject.org/doc/contribute/contribute_guidelines.html
 .. _Zephyr GitHub wiki: https://github.com/zephyrproject-rtos/zephyr/wiki
-.. _Zephyr Development mailing list: https://lists.zephyrproject.org/g/devel
-.. _Zephyr mailing list subgroups: https://lists.zephyrproject.org/g/main/subgroups
-.. _Sample and Demo Code Examples: http://docs.zephyrproject.org/latest/samples/index.html
-.. _Security: http://docs.zephyrproject.org/latest/security/index.html
-.. _Asking for Help Tips: https://docs.zephyrproject.org/latest/guides/getting-help.html
+.. _Zephyr Mailing Lists: https://lists.zephyrproject.org/
+.. _Sample and Demo Code Examples: https://www.zephyrproject.org/doc/samples/samples.html
+.. _Security Overview: https://www.zephyrproject.org/doc/security/security-overview.html

VERSION

@@ -1,5 +0,0 @@
-VERSION_MAJOR = 2
-VERSION_MINOR = 6
-PATCHLEVEL = 0
-VERSION_TWEAK = 0
-EXTRAVERSION = rc1

arch/CMakeLists.txt

@@ -1,11 +0,0 @@
-# SPDX-License-Identifier: Apache-2.0
-
-add_definitions(-D__ZEPHYR_SUPERVISOR__)
-
-include_directories(
-  ${ZEPHYR_BASE}/kernel/include
-  ${ARCH_DIR}/${ARCH}/include
-  )
-
-add_subdirectory(common)
-add_subdirectory(${ARCH_DIR}/${ARCH} arch/${ARCH})

arch/Makefile

@@ -0,0 +1 @@
+obj-y += common/ $(ARCH)/

arch/arc/CMakeLists.txt

@@ -1,22 +0,0 @@
-# SPDX-License-Identifier: Apache-2.0
-
-# Enable debug support in mdb
-# Dwarf version 2 can be recognized by mdb
-# The default dwarf version in gdb is not recognized by mdb
-zephyr_cc_option(-g3 -gdwarf-2)
-
-# Without this (poorly named) option, compiler may generate undefined
-# references to abort().
-# See https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63691
-zephyr_cc_option(-fno-delete-null-pointer-checks)
-
-zephyr_cc_option_ifdef(CONFIG_ARC_USE_UNALIGNED_MEM_ACCESS -munaligned-access)
-
-if(CONFIG_ISA_ARCV2)
-  # Instruct compiler to use register R26 as thread pointer
-  # for thread local storage.
-  # For ARCv3 the register is fixed to r30, so we don't need to specify it
-  zephyr_cc_option_ifdef(CONFIG_THREAD_LOCAL_STORAGE -mtp-regno=26)
-endif()
-
-add_subdirectory(core)

arch/arc/Kbuild

@@ -0,0 +1,6 @@
+subdir-ccflags-y +=-I$(srctree)/include/drivers
+subdir-ccflags-y +=-I$(srctree)/drivers
+subdir-asflags-y += $(subdir-ccflags-y)
+
+obj-y += soc/$(SOC_PATH)/
+obj-y += core/

arch/arc/Kconfig

@@ -1,7 +1,18 @@
-# ARC options
+# ARC EM4 options
 
-# Copyright (c) 2014, 2019 Wind River Systems, Inc.
+#
+# Copyright (c) 2014 Wind River Systems, Inc.
+#
 # SPDX-License-Identifier: Apache-2.0
+#
+
+choice
+	prompt "ARC SoC Selection"
+	depends on ARC
+
+	source "arch/arc/soc/*/Kconfig.soc"
+endchoice
+
 
 menu "ARC Options"
 	depends on ARC
@@ -9,115 +20,56 @@ menu "ARC Options"
 config ARCH
 	default "arc"
 
+config ARCH_DEFCONFIG
+	string
+	default "arch/arc/defconfig"
 
-config CPU_ARCEM
+config CPU_HAS_MPU
 	bool
+	# Omit prompt to signify "hidden" option
+	default n
+	help
+	  This option is enabled when the CPU has a Memory Protection Unit (MPU).
+
+config CPU_HAS_FPU
+	# Hidden config selected by CPU family
+	bool
+	default n
+	help
+	This option is enabled when the CPU has hardware floating point
+	unit.
+
+menu "ARC EM4 processor options"
+
+config	CPU_ARCEM4
+	bool
+	default y
+	select CPU_ARCV2
 	select ATOMIC_OPERATIONS_C
 	help
-	  This option signifies the use of an ARC EM CPU
+	This option signifies the use of an ARC EM4 CPU
 
-config CPU_ARCHS
+endmenu
+
+menu "ARCv2 Family Options"
+
+config	CPU_ARCV2
 	bool
-	# FIXME: ATOMIC_OPERATIONS_BUILTIN still has some problem in arcmwdt
-	# toolchain, so choosing ATOMIC_OPERATIONS_C instead.
-	select ATOMIC_OPERATIONS_C if "$(ZEPHYR_TOOLCHAIN_VARIANT)" = "arcmwdt"
-	select ATOMIC_OPERATIONS_BUILTIN if "$(ZEPHYR_TOOLCHAIN_VARIANT)" != "arcmwdt"
-	help
-	  This option signifies the use of an ARC HS CPU
-
-
-choice
-	prompt "ARC Instruction Set"
-	default ISA_ARCV2
-
-config ISA_ARCV2
-	bool "ARC ISA v2"
-	select ARCH_HAS_STACK_PROTECTION if ARC_HAS_STACK_CHECKING || (ARC_MPU && ARC_MPU_VER !=2)
-	select ARCH_HAS_USERSPACE if ARC_MPU
-	select USE_SWITCH
-	select USE_SWITCH_SUPPORTED
-	help
-	  v2 ISA for the ARC-HS & ARC-EM cores
-
-config ISA_ARCV3
-	bool "ARC ISA v3"
-	select USE_SWITCH
-	select USE_SWITCH_SUPPORTED
-
-endchoice
-
-if ISA_ARCV2
-
-config CPU_EM4
-	bool
-	select CPU_ARCEM
-	help
-	  If y, the SoC uses an ARC EM4 CPU
-
-config CPU_EM4_DMIPS
-	bool
-	select CPU_ARCEM
-	help
-	  If y, the SoC uses an ARC EM4 DMIPS CPU
-
-config CPU_EM4_FPUS
-	bool
-	select CPU_ARCEM
-	help
-	  If y, the SoC uses an ARC EM4 DMIPS CPU with the single-precision
-	  floating-point extension
-
-config CPU_EM4_FPUDA
-	bool
-	select CPU_ARCEM
-	help
-	  If y, the SoC uses an ARC EM4 DMIPS CPU with single-precision
-	  floating-point and double assist instructions
-
-config CPU_EM6
-	bool
-	select CPU_ARCEM
-	help
-	  If y, the SoC uses an ARC EM6 CPU
-
-config CPU_HS3X
-	bool
-	select CPU_ARCHS
-	help
-	  If y, the SoC uses an ARC HS3x or HS4x CPU
-
-endif #ISA_ARCV2
-
-if ISA_ARCV3
-
-config CPU_HS6X
-	bool
-	select CPU_ARCHS
-	select 64BIT
-	help
-	  If y, the SoC uses an ARC HS6x CPU
-
-endif #ISA_ARCV3
-
-config FP_FPU_DA
-	bool
-
-menu "ARC CPU Options"
-
-config ARC_HAS_ZOL
-	bool
-	depends on ISA_ARCV2
 	default y
 	help
-	  ARCv2 CPUs have ZOL hardware loop mechanism which the ARCv3 ISA drops.
-	  Architecturally ZOL provides
-	  - LPcc instruction
-	  - LP_COUNT core reg
-	  - LP_START, LP_END aux regs
-	  Disabling this option removes usage of ZOL regs from code
+	  This option signifies the use of a CPU of the ARCv2 family.
 
-config NUM_IRQ_PRIO_LEVELS
-	int "Number of supported interrupt priority levels"
+config	DATA_ENDIANNESS_LITTLE
+	bool
+	default y
+	help
+	  This is driven by the processor implementation, since it is fixed in
+	  hardware. The BSP should set this value to 'n' if the data is
+	  implemented as big endian.
+
+config	NUM_IRQ_PRIO_LEVELS
+	int
+	prompt "Number of supported interrupt priority levels"
 	range 1 16
 	help
 	  Interrupt priorities available will be 0 to NUM_IRQ_PRIO_LEVELS-1.
@@ -125,8 +77,9 @@ config NUM_IRQ_PRIO_LEVELS
 
 	  The BSP must provide a valid default for proper operation.
 
-config NUM_IRQS
-	int "Upper limit of interrupt numbers/IDs used"
+config	NUM_IRQS
+	int
+	prompt "Upper limit of interrupt numbers/IDs used"
 	range 17 256
 	help
 	  Interrupts available will be 0 to NUM_IRQS-1.
@@ -136,105 +89,56 @@ config NUM_IRQS
 	  The BSP must provide a valid default. This drives the size of the
 	  vector table.
 
-config RGF_NUM_BANKS
-	int "Number of General Purpose Register Banks"
-	depends on ARC_FIRQ
+config	RGF_NUM_BANKS
+	int
+	prompt "Number of General Purpose Register Banks"
+	depends on CPU_ARCV2
 	range 1 2
 	default 2
 	help
-	  The ARC CPU can be configured to have more than one register
-	  bank. If fast interrupts are supported (FIRQ), the 2nd
-	  register bank, in the set, will be used by FIRQ interrupts.
-	  If fast interrupts are supported but there is only 1
-	  register bank, the fast interrupt handler must save
-	  and restore general purpose registers.
+	The ARC CPU can be configured to have more than one register
+	bank. If fast interrupts are supported (FIRQ), the 2nd
+	register bank, in the set, will be used by FIRQ interrupts.
+	If fast interrupts are supported but there is only 1
+	register bank, the fast interrupt handler must save
+	and restore general purpose registers.
 
-config ARC_FIRQ
-	bool "FIRQ enable"
-	depends on ISA_ARCV2
-	default y
-	help
-	  Fast interrupts are supported (FIRQ). If FIRQ enabled, for interrupts
-	  with highest priority, status32 and pc will be saved in aux regs,
-	  other regs will be saved according to the number of register bank;
-	  If FIRQ is disabled, the handle of interrupts with highest priority
-	  will be same with other interrupts.
-
-config ARC_FIRQ_STACK
-	bool "Enable separate firq stack"
-	depends on ARC_FIRQ && RGF_NUM_BANKS > 1
-	help
-	  Use separate stack for FIRQ handing. When the fast irq is also a direct
-	  irq, this will get the minimal interrupt latency.
-
-config ARC_FIRQ_STACK_SIZE
-	int "FIRQ stack size"
-	depends on ARC_FIRQ_STACK
-	default 1024
-	help
-	  The size of firq stack.
-
-config ARC_HAS_STACK_CHECKING
-	bool "ARC has STACK_CHECKING"
-	depends on ISA_ARCV2
-	default y
-	help
-	  ARC is configured with STACK_CHECKING which is a mechanism for
-	  checking stack accesses and raising an exception when a stack
-	  overflow or underflow is detected.
-
-config ARC_CONNECT
-	bool "ARC has ARC connect"
-	select SCHED_IPI_SUPPORTED
-	help
-	  ARC is configured with ARC CONNECT which is a hardware for connecting
-	  multi cores.
-
-config ARC_STACK_CHECKING
-	bool
-	select NO_UNUSED_STACK_INSPECTION
-	help
-	  Use ARC STACK_CHECKING to do stack protection
-
-config ARC_STACK_PROTECTION
-	bool
-	default y if HW_STACK_PROTECTION
-	select ARC_STACK_CHECKING if ARC_HAS_STACK_CHECKING
-	select MPU_STACK_GUARD if (!ARC_STACK_CHECKING && ARC_MPU && ARC_MPU_VER !=2)
+config	ARC_STACK_CHECKING
+	bool "Enable Stack Checking"
+	depends on CPU_ARCV2
 	select THREAD_STACK_INFO
+	default n
 	help
-	  This option enables either:
-	  - The ARC stack checking, or
-	  - the MPU-based stack guard
-	  to cause a system fatal error
-	  if the bounds of the current process stack are overflowed.
-	  The two stack guard options are mutually exclusive. The
-	  selection of the ARC stack checking is
-	  prioritized over the MPU-based stack guard.
+	  ARCV2 has a special feature allowing to check stack overflows. This
+	  enables code that allows using this debug feature
 
-config ARC_USE_UNALIGNED_MEM_ACCESS
-	bool "Enable unaligned access in HW"
-	default y if CPU_ARCHS
-	depends on (CPU_ARCEM && !ARC_HAS_SECURE) || CPU_ARCHS
-	help
-	  ARC EM cores w/o secure shield 2+2 mode support might be configured
-	  to support unaligned memory access which is then disabled by default.
-	  Enable unaligned access in hardware and make software to use it.
-
-config FAULT_DUMP
-	int "Fault dump level"
+config	FAULT_DUMP
+	int
+	prompt "Fault dump level"
 	default 2
 	range 0 2
 	help
-	  Different levels for display information when a fault occurs.
+	Different levels for display information when a fault occurs.
 
-	  2: The default. Display specific and verbose information. Consumes
+	2: The default. Display specific and verbose information. Consumes
 		the most memory (long strings).
 
-	  1: Display general and short information. Consumes less memory
+	1: Display general and short information. Consumes less memory
 		(short strings).
 
-	  0: Off.
+	0: Off.
+
+config IRQ_OFFLOAD
+	bool "Enable IRQ offload"
+	default n
+	help
+	Enable irq_offload() API which allows functions to be synchronously
+	run in interrupt context. Uses one entry in the	IDT.  Mainly useful
+	for test cases.
+
+config	XIP
+	default n if NSIM
+	default y
 
 config GEN_ISR_TABLES
 	default y
@@ -243,83 +147,53 @@ config GEN_IRQ_START_VECTOR
 	default 16
 
 config HARVARD
-	bool "Harvard Architecture"
+	prompt "Harvard Architecture"
+	bool
+	default n
 	help
-	  The ARC CPU can be configured to have two busses;
-	  one for instruction fetching and another that serves as a data bus.
+	The ARC CPU can be configured to have two busses;
+	one for instruction fetching and another that serves as a data bus.
 
 config CODE_DENSITY
-	bool "Code Density Option"
+	prompt "Code Density Option"
+	bool
+	default n
 	help
-	  Enable code density option to get better code density
+	Enable code density option to get better code density
 
-config ARC_HAS_ACCL_REGS
-	bool "Reg Pair ACCL:ACCH (FPU and/or MPY > 6)"
-	default y if FPU
+menu "Floating Point Options"
+depends on CPU_HAS_FPU
+
+config FLOAT
+	bool
+	prompt "Floating point registers"
+	default n
 	help
-	  Depending on the configuration, CPU can contain accumulator reg-pair
-	  (also referred to as r58:r59). These can also be used by gcc as GPR so
-	  kernel needs to save/restore per process
+	This option allows tasks and fibers to use the floating point registers.
+	By default, only a single task or fiber may use the registers.
 
-config ARC_HAS_SECURE
-	bool "ARC has SecureShield"
-	depends on ISA_ARCV2
-	select CPU_HAS_TEE
-	select ARCH_HAS_TRUSTED_EXECUTION
+	Disabling this option means that any task or fiber that uses a
+	floating point register will get a fatal exception.
+
+config FP_SHARING
+	bool
+	prompt "Floating point register sharing"
+	depends on FLOAT
+	default n
 	help
-	  This option is enabled when ARC core supports secure mode
+	This option allows multiple tasks and fibers to use the floating point
+	registers.
 
-config SJLI_TABLE_SIZE
-	int "SJLI table size"
-	depends on ARC_SECURE_FIRMWARE
-	default 8
-	help
-	  The size of sjli (Secure Jump and Link Indexed) table. The
-	  code in normal mode call secure services in secure mode through
-	  sjli instruction.
-
-config ARC_SECURE_FIRMWARE
-	bool "Generate Secure Firmware"
-	depends on ARC_HAS_SECURE
-	default y if TRUSTED_EXECUTION_SECURE
-	help
-	  This option indicates that we are building a Zephyr image that
-	  is intended to execute in secure mode. The option is only
-	  applicable to ARC processors that implement the SecureShield.
-
-	  This option enables Zephyr to include code that executes in
-	  secure mode, as well as to exclude code that is designed to
-	  execute only in normal mode.
-
-	  Code executing in secure mode has access to both the secure
-	  and normal resources of the ARC processors.
-
-config ARC_NORMAL_FIRMWARE
-	bool "Generate Normal Firmware"
-	depends on !ARC_SECURE_FIRMWARE
-	depends on ARC_HAS_SECURE
-	default y if TRUSTED_EXECUTION_NONSECURE
-	help
-	  This option indicates that we are building a Zephyr image that
-	  is intended to execute in normal mode. Execution of this
-	  image is triggered by secure firmware that executes in secure
-	  mode. The option is only applicable to ARC processors that
-	  implement the SecureShield.
-
-	  This option enables Zephyr to include code that executes in
-	  normal mode only, as well as to exclude code that is
-	  designed to execute only in secure mode.
-
-	  Code executing in normal mode has no access to secure
-	  resources of the ARC processors, and, therefore, it shall avoid
-	  accessing them.
+endmenu
 
 menu "ARC MPU Options"
 depends on CPU_HAS_MPU
 
 config ARC_MPU_ENABLE
 	bool "Enable MPU"
+	depends on CPU_HAS_MPU
 	select ARC_MPU
+	default n
 	help
 	  Enable MPU
 
@@ -327,39 +201,99 @@ source "arch/arc/core/mpu/Kconfig"
 
 endmenu
 
-config DCACHE_LINE_SIZE
-	default 32
-
-config ARC_EXCEPTION_STACK_SIZE
-	int "ARC exception handling stack size"
-	default 768
+config ICCM_SIZE
+	int "ICCM Size in kB"
 	help
-	  Size in bytes of exception handling stack which is at the top of
-	  interrupt stack to get smaller memory footprint because exception
-	  is not frequent. To reduce the impact on interrupt handling,
-	  especially nested interrupt, it cannot be too large.
+	This option specifies the size of the ICCM in kB.  It is normally set by
+	the board's defconfig file and the user should generally avoid modifying
+	it via the menu configuration.
 
-endmenu
+config ICCM_BASE_ADDRESS
+	hex "ICCM Base Address"
+	help
+	This option specifies the base address of the ICCM on the board.  It is
+	normally set by the board's defconfig file and the user should generally
+	avoid modifying it via the menu configuration.
 
-config ARC_EXCEPTION_DEBUG
-	bool "Unhandled exception debugging information"
+config DCCM_SIZE
+	int "DCCM Size in kB"
+	help
+	This option specifies the size of the DCCM in kB.  It is normally set by
+	the board's defconfig file and the user should generally avoid modifying
+	it via the menu configuration.
+
+config DCCM_BASE_ADDRESS
+	hex "DCCM Base Address"
+	help
+	This option specifies the base address of the DCCM on the board.  It is
+	normally set by the board's defconfig file and the user should generally
+	avoid modifying it via the menu configuration.
+
+config SRAM_SIZE
+	int "SRAM Size in kB"
+	help
+	This option specifies the size of the SRAM in kB.  It is normally set by
+	the board's defconfig file and the user should generally avoid modifying
+	it via the menu configuration.
+
+config SRAM_BASE_ADDRESS
+	hex "SRAM Base Address"
+	help
+	This option specifies the base address of the SRAM on the board.  It is
+	normally set by the board's defconfig file and the user should generally
+	avoid modifying it via the menu configuration.
+
+config FLASH_SIZE
+	int "Flash Size in kB"
+	help
+	This option specifies the size of the flash in kB.  It is normally set by
+	the board's defconfig file and the user should generally avoid modifying
+	it via the menu configuration.
+
+config FLASH_BASE_ADDRESS
+	hex "Flash Base Address"
+	help
+	This option specifies the base address of the flash on the board.  It is
+	normally set by the board's defconfig file and the user should generally
+	avoid modifying it via the menu configuration.
+
+config CACHE_LINE_SIZE_DETECT
+	bool
+	prompt "Detect d-cache line size at runtime"
 	default n
-	depends on PRINTK || LOG
 	help
-	  Print human-readable information about exception vectors, cause codes,
-	  and parameters, at a cost of code/data size for the human-readable
-	  strings.
+	This option enables querying the d-cache build register for finding
+	the d-cache line size at the expense of taking more memory and code
+	and a slightly increased boot time.
+
+	If the CPU's d-cache line size is known in advance, disable this
+	option and manually enter the value for CACHE_LINE_SIZE.
+
+config CACHE_LINE_SIZE
+	int
+	prompt "Cache line size" if !CACHE_LINE_SIZE_DETECT
+	default 32
+	help
+	Size in bytes of a CPU d-cache line.
+
+	Detect automatically at runtime by selecting CACHE_LINE_SIZE_DETECT.
+
+config ARCH_CACHE_FLUSH_DETECT
+	bool
+	default n
+
+config CACHE_FLUSHING
+	bool
+	default n
+	prompt "Enable d-cache flushing mechanism"
+	help
+	This links in the sys_cache_flush() function, which provides a
+	way to flush multiple lines of the d-cache.
+	If the d-cache is present, set this to y.
+	If the d-cache is NOT present, set this to n.
 
 endmenu
 
-config MAIN_STACK_SIZE
-	default 4096 if 64BIT
+source "arch/arc/soc/*/Kconfig"
 
-config TEST_EXTRA_STACKSIZE
-	default 1024 if 64BIT
-
-config CMSIS_THREAD_MAX_STACK_SIZE
-	default 1024 if 64BIT
-
-config CMSIS_V2_THREAD_MAX_STACK_SIZE
-	default 1024 if 64BIT
+endmenu

arch/arc/Makefile

@@ -0,0 +1,24 @@
+# Enable debug support in mdb
+# Dwarf version 2 can be recognized by mdb
+# The default dwarf version in gdb is not recognized by mdb
+cflags-y += $(call cc-option, -g3 -gdwarf-2)
+
+cflags-y += $(call cc-option,-ffunction-sections,) $(call cc-option,-fdata-sections,)
+
+# Without this (poorly named) option, compiler may generate undefined
+# references to abort().
+# See https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63691
+cflags-y += $(call cc-option,-fno-delete-null-pointer-checks)
+
+cflags-$(CONFIG_LTO) = $(call cc-option,-flto,)
+
+include $(srctree)/arch/$(ARCH)/soc/$(SOC_PATH)/Makefile
+
+KBUILD_CFLAGS += $(cflags-y)
+KBUILD_CXXFLAGS += $(cflags-y)
+
+soc-cxxflags ?= $(soc-cflags)
+soc-aflags ?= $(soc-cflags)
+KBUILD_CFLAGS += $(soc-cflags)
+KBUILD_CXXFLAGS += $(soc-cxxflags)
+KBUILD_AFLAGS += $(soc-aflags)

arch/arc/core/CMakeLists.txt

@@ -1,41 +0,0 @@
-# SPDX-License-Identifier: Apache-2.0
-
-zephyr_library()
-
-if(CONFIG_COVERAGE)
-  zephyr_compile_options($<TARGET_PROPERTY:compiler,coverage>)
-  zephyr_link_libraries($<TARGET_PROPERTY:linker,coverage>)
-endif()
-
-zephyr_library_sources(
-  thread.c
-  thread_entry_wrapper.S
-  cpu_idle.S
-  fatal.c
-  fault.c
-  fault_s.S
-  irq_manage.c
-  timestamp.c
-  isr_wrapper.S
-  regular_irq.S
-  switch.S
-  prep_c.c
-  reset.S
-  vector_table.c
-  )
-
-zephyr_library_sources_ifdef(CONFIG_CACHE_MANAGEMENT cache.c)
-zephyr_library_sources_ifdef(CONFIG_ARC_FIRQ fast_irq.S)
-
-zephyr_library_sources_ifdef(CONFIG_IRQ_OFFLOAD irq_offload.c)
-
-zephyr_library_sources_ifdef(CONFIG_USERSPACE userspace.S)
-zephyr_library_sources_ifdef(CONFIG_ARC_CONNECT arc_connect.c)
-zephyr_library_sources_ifdef(CONFIG_ARC_CONNECT arc_smp.c)
-
-zephyr_library_sources_ifdef(CONFIG_THREAD_LOCAL_STORAGE tls.c)
-
-add_subdirectory_ifdef(CONFIG_ARC_CORE_MPU mpu)
-add_subdirectory_ifdef(CONFIG_ARC_SECURE_FIRMWARE secureshield)
-
-zephyr_linker_sources(ROM_START SORT_KEY 0x0vectors vector_table.ld)

arch/arc/core/Makefile

@@ -0,0 +1,20 @@
+ccflags-y += -I$(srctree)/kernel/include
+ccflags-y +=-I$(srctree)/arch/$(ARCH)/include
+
+obj-y += thread.o thread_entry_wrapper.o \
+	cpu_idle.o  fast_irq.o  fatal.o  fault.o  \
+	fault_s.o  irq_manage.o cache.o timestamp.o  \
+	isr_wrapper.o  regular_irq.o  swap.o \
+	sys_fatal_error_handler.o
+
+obj-y += prep_c.o \
+         reset.o \
+         vector_table.o
+
+obj-$(CONFIG_IRQ_OFFLOAD) += irq_offload.o
+
+# Some ARC cores like the EM4 lack the atomic LLOCK/SCOND and
+# can't use these.
+obj-$(CONFIG_ATOMIC_OPERATIONS_CUSTOM) += atomic.o
+
+obj-$(CONFIG_CPU_HAS_MPU) += mpu/

arch/arc/core/arc_connect.c

@@ -1,443 +0,0 @@
-/*
- * Copyright (c) 2019 Synopsys.
- *
- * SPDX-License-Identifier: Apache-2.0
- */
-
-/**
- * @file
- * @brief ARCv2 ARC CONNECT driver
- *
- */
-
-#include <kernel.h>
-#include <arch/cpu.h>
-#include <spinlock.h>
-#include <kernel_internal.h>
-
-static struct k_spinlock arc_connect_spinlock;
-
-/* Generate an inter-core interrupt to the target core */
-void z_arc_connect_ici_generate(uint32_t core)
-{
-	LOCKED(&arc_connect_spinlock) {
-		z_arc_connect_cmd(ARC_CONNECT_CMD_INTRPT_GENERATE_IRQ, core);
-	}
-}
-
-/* Acknowledge the inter-core interrupt raised by core */
-void z_arc_connect_ici_ack(uint32_t core)
-{
-	LOCKED(&arc_connect_spinlock) {
-		z_arc_connect_cmd(ARC_CONNECT_CMD_INTRPT_GENERATE_ACK, core);
-	}
-}
-
-/* Read inter-core interrupt status */
-uint32_t z_arc_connect_ici_read_status(uint32_t core)
-{
-	uint32_t ret = 0;
-
-	LOCKED(&arc_connect_spinlock) {
-		z_arc_connect_cmd(ARC_CONNECT_CMD_INTRPT_READ_STATUS, core);
-		ret = z_arc_connect_cmd_readback();
-	}
-
-	return ret;
-}
-
-/* Check the source of inter-core interrupt */
-uint32_t z_arc_connect_ici_check_src(void)
-{
-	uint32_t ret = 0;
-
-	LOCKED(&arc_connect_spinlock) {
-		z_arc_connect_cmd(ARC_CONNECT_CMD_INTRPT_CHECK_SOURCE, 0);
-		ret = z_arc_connect_cmd_readback();
-	}
-
-	return ret;
-}
-
-/* Clear the inter-core interrupt */
-void z_arc_connect_ici_clear(void)
-{
-	uint32_t cpu, c;
-
-	LOCKED(&arc_connect_spinlock) {
-
-		z_arc_connect_cmd(ARC_CONNECT_CMD_INTRPT_CHECK_SOURCE, 0);
-		cpu = z_arc_connect_cmd_readback(); /* 1,2,4,8... */
-	/*
-	 * In rare case, multiple concurrent ICIs sent to same target can
-	 * possibly be coalesced by MCIP into 1 asserted IRQ, so @cpu can be
-	 * "vectored" (multiple bits sets) as opposed to typical single bit
-	 */
-		while (cpu) {
-			c = find_lsb_set(cpu) - 1;
-			z_arc_connect_cmd(
-				ARC_CONNECT_CMD_INTRPT_GENERATE_ACK, c);
-			cpu &= ~(1U << c);
-		}
-	}
-}
-
-/* Reset the cores in core_mask */
-void z_arc_connect_debug_reset(uint32_t core_mask)
-{
-	LOCKED(&arc_connect_spinlock) {
-		z_arc_connect_cmd_data(ARC_CONNECT_CMD_DEBUG_RESET,
-			0, core_mask);
-	}
-}
-
-/* Halt the cores in core_mask */
-void z_arc_connect_debug_halt(uint32_t core_mask)
-{
-	LOCKED(&arc_connect_spinlock) {
-		z_arc_connect_cmd_data(ARC_CONNECT_CMD_DEBUG_HALT,
-			0, core_mask);
-	}
-}
-
-/* Run the cores in core_mask */
-void z_arc_connect_debug_run(uint32_t core_mask)
-{
-	LOCKED(&arc_connect_spinlock) {
-		z_arc_connect_cmd_data(ARC_CONNECT_CMD_DEBUG_RUN,
-			0, core_mask);
-	}
-}
-
-/* Set core mask */
-void z_arc_connect_debug_mask_set(uint32_t core_mask, uint32_t mask)
-{
-	LOCKED(&arc_connect_spinlock) {
-		z_arc_connect_cmd_data(ARC_CONNECT_CMD_DEBUG_SET_MASK,
-			mask, core_mask);
-	}
-}
-
-/* Read core mask */
-uint32_t z_arc_connect_debug_mask_read(uint32_t core_mask)
-{
-	uint32_t ret = 0;
-
-	LOCKED(&arc_connect_spinlock) {
-		z_arc_connect_cmd_data(ARC_CONNECT_CMD_DEBUG_READ_MASK,
-			0, core_mask);
-		ret = z_arc_connect_cmd_readback();
-	}
-
-	return ret;
-}
-
-/*
- * Select cores that should be halted if the core issuing the command is halted
- */
-void z_arc_connect_debug_select_set(uint32_t core_mask)
-{
-	LOCKED(&arc_connect_spinlock) {
-		z_arc_connect_cmd_data(ARC_CONNECT_CMD_DEBUG_SET_SELECT,
-			0, core_mask);
-	}
-}
-
-/* Read the select value */
-uint32_t z_arc_connect_debug_select_read(void)
-{
-	uint32_t ret = 0;
-
-	LOCKED(&arc_connect_spinlock) {
-		z_arc_connect_cmd(ARC_CONNECT_CMD_DEBUG_READ_SELECT, 0);
-		ret = z_arc_connect_cmd_readback();
-	}
-
-	return ret;
-}
-
-/* Read the status, halt or run of all cores in the system */
-uint32_t z_arc_connect_debug_en_read(void)
-{
-	uint32_t ret = 0;
-
-	LOCKED(&arc_connect_spinlock) {
-		z_arc_connect_cmd(ARC_CONNECT_CMD_DEBUG_READ_EN, 0);
-		ret = z_arc_connect_cmd_readback();
-	}
-
-	return ret;
-}
-
-/* Read the last command sent */
-uint32_t z_arc_connect_debug_cmd_read(void)
-{
-	uint32_t ret = 0;
-
-	LOCKED(&arc_connect_spinlock) {
-		z_arc_connect_cmd(ARC_CONNECT_CMD_DEBUG_READ_CMD, 0);
-		ret = z_arc_connect_cmd_readback();
-	}
-
-	return ret;
-}
-
-/* Read the value of internal MCD_CORE register */
-uint32_t z_arc_connect_debug_core_read(void)
-{
-	uint32_t ret = 0;
-
-	LOCKED(&arc_connect_spinlock) {
-		z_arc_connect_cmd(ARC_CONNECT_CMD_DEBUG_READ_CORE, 0);
-		ret = z_arc_connect_cmd_readback();
-	}
-
-	return ret;
-}
-
-/* Clear global free running counter */
-void z_arc_connect_gfrc_clear(void)
-{
-	LOCKED(&arc_connect_spinlock) {
-		z_arc_connect_cmd(ARC_CONNECT_CMD_GFRC_CLEAR, 0);
-	}
-}
-
-/* Read total 64 bits of global free running counter */
-uint64_t z_arc_connect_gfrc_read(void)
-{
-	uint32_t low;
-	uint32_t high;
-	uint32_t key;
-
-	/*
-	 * each core has its own arc connect interface, i.e.,
-	 * CMD/READBACK. So several concurrent commands to ARC
-	 * connect are of if they are trying to access different
-	 * sub-components. For GFRC, HW allows simultaneously accessing to
-	 * counters. So an irq lock is enough.
-	 */
-	key = arch_irq_lock();
-
-	z_arc_connect_cmd(ARC_CONNECT_CMD_GFRC_READ_LO, 0);
-	low = z_arc_connect_cmd_readback();
-
-	z_arc_connect_cmd(ARC_CONNECT_CMD_GFRC_READ_HI, 0);
-	high = z_arc_connect_cmd_readback();
-
-	arch_irq_unlock(key);
-
-	return (((uint64_t)high) << 32) | low;
-}
-
-/* Enable global free running counter */
-void z_arc_connect_gfrc_enable(void)
-{
-	LOCKED(&arc_connect_spinlock) {
-		z_arc_connect_cmd(ARC_CONNECT_CMD_GFRC_ENABLE, 0);
-	}
-}
-
-/* Disable global free running counter */
-void z_arc_connect_gfrc_disable(void)
-{
-	LOCKED(&arc_connect_spinlock) {
-		z_arc_connect_cmd(ARC_CONNECT_CMD_GFRC_DISABLE, 0);
-	}
-}
-
-/* Disable global free running counter */
-void z_arc_connect_gfrc_core_set(uint32_t core_mask)
-{
-	LOCKED(&arc_connect_spinlock) {
-		z_arc_connect_cmd_data(ARC_CONNECT_CMD_GFRC_SET_CORE,
-			0, core_mask);
-	}
-}
-
-/* Set the relevant cores to halt global free running counter */
-uint32_t z_arc_connect_gfrc_halt_read(void)
-{
-	uint32_t ret = 0;
-
-	LOCKED(&arc_connect_spinlock) {
-		z_arc_connect_cmd(ARC_CONNECT_CMD_GFRC_READ_HALT, 0);
-		ret = z_arc_connect_cmd_readback();
-	}
-
-	return ret;
-}
-
-/* Read the internal CORE register */
-uint32_t z_arc_connect_gfrc_core_read(void)
-{
-	uint32_t ret = 0;
-
-	LOCKED(&arc_connect_spinlock) {
-		z_arc_connect_cmd(ARC_CONNECT_CMD_GFRC_READ_CORE, 0);
-		ret = z_arc_connect_cmd_readback();
-	}
-
-	return ret;
-}
-
-/* Enable interrupt distribute unit */
-void z_arc_connect_idu_enable(void)
-{
-	LOCKED(&arc_connect_spinlock) {
-		z_arc_connect_cmd(ARC_CONNECT_CMD_IDU_ENABLE, 0);
-	}
-}
-
-/* Disable interrupt distribute unit */
-void z_arc_connect_idu_disable(void)
-{
-	LOCKED(&arc_connect_spinlock) {
-		z_arc_connect_cmd(ARC_CONNECT_CMD_IDU_DISABLE, 0);
-	}
-}
-
-/* Read enable status of interrupt distribute unit */
-uint32_t z_arc_connect_idu_read_enable(void)
-{
-	uint32_t ret = 0;
-
-	LOCKED(&arc_connect_spinlock) {
-		z_arc_connect_cmd(ARC_CONNECT_CMD_IDU_READ_ENABLE, 0);
-		ret = z_arc_connect_cmd_readback();
-	}
-
-	return ret;
-}
-
-/*
- * Set the triggering mode and distribution mode for the specified common
- * interrupt
- */
-void z_arc_connect_idu_set_mode(uint32_t irq_num,
-	uint16_t trigger_mode, uint16_t distri_mode)
-{
-	LOCKED(&arc_connect_spinlock) {
-		z_arc_connect_cmd_data(ARC_CONNECT_CMD_IDU_SET_MODE,
-			irq_num, (distri_mode | (trigger_mode << 4)));
-	}
-}
-
-/* Read the internal MODE register of the specified common interrupt */
-uint32_t z_arc_connect_idu_read_mode(uint32_t irq_num)
-{
-	uint32_t ret = 0;
-
-	LOCKED(&arc_connect_spinlock) {
-		z_arc_connect_cmd(ARC_CONNECT_CMD_IDU_READ_MODE, irq_num);
-		ret = z_arc_connect_cmd_readback();
-	}
-
-	return ret;
-}
-
-/*
- * Set the target cores to receive the specified common interrupt
- * when it is triggered
- */
-void z_arc_connect_idu_set_dest(uint32_t irq_num, uint32_t core_mask)
-{
-	LOCKED(&arc_connect_spinlock) {
-		z_arc_connect_cmd_data(ARC_CONNECT_CMD_IDU_SET_DEST,
-			irq_num, core_mask);
-	}
-}
-
-/* Read the internal DEST register of the specified common interrupt */
-uint32_t z_arc_connect_idu_read_dest(uint32_t irq_num)
-{
-	uint32_t ret = 0;
-
-	LOCKED(&arc_connect_spinlock) {
-		z_arc_connect_cmd(ARC_CONNECT_CMD_IDU_READ_DEST, irq_num);
-		ret = z_arc_connect_cmd_readback();
-	}
-
-	return ret;
-}
-
-/* Assert the specified common interrupt */
-void z_arc_connect_idu_gen_cirq(uint32_t irq_num)
-{
-	LOCKED(&arc_connect_spinlock) {
-		z_arc_connect_cmd(ARC_CONNECT_CMD_IDU_GEN_CIRQ, irq_num);
-	}
-}
-
-/* Acknowledge the specified common interrupt */
-void z_arc_connect_idu_ack_cirq(uint32_t irq_num)
-{
-	LOCKED(&arc_connect_spinlock) {
-		z_arc_connect_cmd(ARC_CONNECT_CMD_IDU_ACK_CIRQ, irq_num);
-	}
-}
-
-/* Read the internal STATUS register of the specified common interrupt */
-uint32_t z_arc_connect_idu_check_status(uint32_t irq_num)
-{
-	uint32_t ret = 0;
-
-	LOCKED(&arc_connect_spinlock) {
-		z_arc_connect_cmd(ARC_CONNECT_CMD_IDU_CHECK_STATUS, irq_num);
-		ret = z_arc_connect_cmd_readback();
-	}
-
-	return ret;
-}
-
-/* Read the internal SOURCE register of the specified common interrupt */
-uint32_t z_arc_connect_idu_check_source(uint32_t irq_num)
-{
-	uint32_t ret = 0;
-
-	LOCKED(&arc_connect_spinlock) {
-		z_arc_connect_cmd(ARC_CONNECT_CMD_IDU_CHECK_SOURCE, irq_num);
-		ret = z_arc_connect_cmd_readback();
-	}
-
-	return ret;
-}
-
-/* Mask or unmask the specified common interrupt */
-void z_arc_connect_idu_set_mask(uint32_t irq_num, uint32_t mask)
-{
-	LOCKED(&arc_connect_spinlock) {
-		z_arc_connect_cmd_data(ARC_CONNECT_CMD_IDU_SET_MASK,
-			irq_num, mask);
-	}
-}
-
-/* Read the internal MASK register of the specified common interrupt */
-uint32_t z_arc_connect_idu_read_mask(uint32_t irq_num)
-{
-	uint32_t ret = 0;
-
-	LOCKED(&arc_connect_spinlock) {
-		z_arc_connect_cmd(ARC_CONNECT_CMD_IDU_READ_MASK, irq_num);
-		ret = z_arc_connect_cmd_readback();
-	}
-
-	return ret;
-}
-
-/*
- * Check if it is the first-acknowledging core to the common interrupt
- * if IDU is programmed in the first-acknowledged mode
- */
-uint32_t z_arc_connect_idu_check_first(uint32_t irq_num)
-{
-	uint32_t ret = 0;
-
-	LOCKED(&arc_connect_spinlock) {
-		z_arc_connect_cmd(ARC_CONNECT_CMD_IDU_CHECK_FIRST, irq_num);
-		ret = z_arc_connect_cmd_readback();
-	}
-
-	return ret;
-
-}

arch/arc/core/arc_smp.c

@@ -1,161 +0,0 @@
-/*
- * Copyright (c) 2019 Synopsys.
- *
- * SPDX-License-Identifier: Apache-2.0
- */
-
-/**
- * @file
- * @brief codes required for ARC multicore and Zephyr smp support
- *
- */
-#include <device.h>
-#include <kernel.h>
-#include <kernel_structs.h>
-#include <ksched.h>
-#include <soc.h>
-#include <init.h>
-
-
-#ifndef IRQ_ICI
-#define IRQ_ICI 19
-#endif
-
-#define ARCV2_ICI_IRQ_PRIORITY 1
-
-volatile struct {
-	arch_cpustart_t fn;
-	void *arg;
-} arc_cpu_init[CONFIG_MP_NUM_CPUS];
-
-/*
- * arc_cpu_wake_flag is used to sync up master core and slave cores
- * Slave core will spin for arc_cpu_wake_flag until master core sets
- * it to the core id of slave core. Then, slave core clears it to notify
- * master core that it's waken
- *
- */
-volatile uint32_t arc_cpu_wake_flag;
-
-volatile char *arc_cpu_sp;
-/*
- * _curr_cpu is used to record the struct of _cpu_t of each cpu.
- * for efficient usage in assembly
- */
-volatile _cpu_t *_curr_cpu[CONFIG_MP_NUM_CPUS];
-
-/* Called from Zephyr initialization */
-void arch_start_cpu(int cpu_num, k_thread_stack_t *stack, int sz,
-		    arch_cpustart_t fn, void *arg)
-{
-	_curr_cpu[cpu_num] = &(_kernel.cpus[cpu_num]);
-	arc_cpu_init[cpu_num].fn = fn;
-	arc_cpu_init[cpu_num].arg = arg;
-
-	/* set the initial sp of target sp through arc_cpu_sp
-	 * arc_cpu_wake_flag will protect arc_cpu_sp that
-	 * only one slave cpu can read it per time
-	 */
-	arc_cpu_sp = Z_THREAD_STACK_BUFFER(stack) + sz;
-
-	arc_cpu_wake_flag = cpu_num;
-
-	/* wait slave cpu to start */
-	while (arc_cpu_wake_flag != 0U) {
-		;
-	}
-}
-
-/* the C entry of slave cores */
-void z_arc_slave_start(int cpu_num)
-{
-	arch_cpustart_t fn;
-
-#ifdef CONFIG_SMP
-	z_irq_setup();
-
-	z_arc_connect_ici_clear();
-	z_irq_priority_set(IRQ_ICI, ARCV2_ICI_IRQ_PRIORITY, 0);
-	irq_enable(IRQ_ICI);
-#endif
-	/* call the function set by arch_start_cpu */
-	fn = arc_cpu_init[cpu_num].fn;
-
-	fn(arc_cpu_init[cpu_num].arg);
-}
-
-#ifdef CONFIG_SMP
-
-static void sched_ipi_handler(const void *unused)
-{
-	ARG_UNUSED(unused);
-
-	z_arc_connect_ici_clear();
-	z_sched_ipi();
-}
-
-/* arch implementation of sched_ipi */
-void arch_sched_ipi(void)
-{
-	uint32_t i;
-
-	/* broadcast sched_ipi request to other cores
-	 * if the target is current core, hardware will ignore it
-	 */
-	for (i = 0U; i < CONFIG_MP_NUM_CPUS; i++) {
-		z_arc_connect_ici_generate(i);
-	}
-}
-
-static int arc_smp_init(const struct device *dev)
-{
-	ARG_UNUSED(dev);
-	struct arc_connect_bcr bcr;
-
-	/* necessary master core init */
-	_curr_cpu[0] = &(_kernel.cpus[0]);
-
-	bcr.val = z_arc_v2_aux_reg_read(_ARC_V2_CONNECT_BCR);
-
-	if (bcr.ipi) {
-	/* register ici interrupt, just need master core to register once */
-		z_arc_connect_ici_clear();
-		IRQ_CONNECT(IRQ_ICI, ARCV2_ICI_IRQ_PRIORITY,
-		    sched_ipi_handler, NULL, 0);
-
-		irq_enable(IRQ_ICI);
-	} else {
-		__ASSERT(0,
-			"ARC connect has no inter-core interrupt\n");
-		return -ENODEV;
-	}
-
-	if (bcr.dbg) {
-	/* configure inter-core debug unit if available */
-		uint32_t core_mask = (1 << CONFIG_MP_NUM_CPUS) - 1;
-		z_arc_connect_debug_select_set(core_mask);
-		/* Debugger halt cores at conditions */
-		z_arc_connect_debug_mask_set(core_mask,	(ARC_CONNECT_CMD_DEBUG_MASK_SH
-			| ARC_CONNECT_CMD_DEBUG_MASK_BH | ARC_CONNECT_CMD_DEBUG_MASK_AH
-			| ARC_CONNECT_CMD_DEBUG_MASK_H));
-
-	}
-
-	if (bcr.gfrc) {
-		/* global free running count init */
-		z_arc_connect_gfrc_enable();
-
-		/* when all cores halt, gfrc halt */
-		z_arc_connect_gfrc_core_set((1 << CONFIG_MP_NUM_CPUS) - 1);
-		z_arc_connect_gfrc_clear();
-	} else {
-		__ASSERT(0,
-			"ARC connect has no global free running counter\n");
-		return -ENODEV;
-	}
-
-	return 0;
-}
-
-SYS_INIT(arc_smp_init, PRE_KERNEL_1, CONFIG_KERNEL_INIT_PRIORITY_DEFAULT);
-#endif

arch/arc/core/atomic.S

@@ -0,0 +1,422 @@
+/*
+ * Copyright (c) 2014 Wind River Systems, Inc.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/**
+ * @file
+ * @brief ARC atomic operations library
+ *
+ * This library provides routines to perform a number of atomic operations
+ * on a memory location: add, subtract, increment, decrement, bitwise OR,
+ * bitwise NOR, bitwise AND, bitwise NAND, set, clear and compare-and-swap.
+ *
+ * This requires the processor to support LLOCK and SCOND instructions,
+ * where they are not supported on ARC EM family processors.
+ */
+
+#include <toolchain.h>
+#include <linker/sections.h>
+
+/* exports */
+
+GTEXT(atomic_set)
+GTEXT(atomic_get)
+GTEXT(atomic_add)
+GTEXT(atomic_nand)
+GTEXT(atomic_and)
+GTEXT(atomic_or)
+GTEXT(atomic_xor)
+GTEXT(atomic_clear)
+GTEXT(atomic_dec)
+GTEXT(atomic_inc)
+GTEXT(atomic_sub)
+GTEXT(atomic_cas)
+
+	.section .TEXT._Atomic, "ax"
+	.balign  2
+
+/**
+ *
+ * @brief Atomically clear a memory location
+ *
+ * This routine atomically clears the contents of <target> and returns the old
+ * value that was in <target>.
+ *
+ * This routine can be used from both task and interrupt level.
+ *
+ * @return Contents of <target> before the atomic operation
+ *
+ * ERRNO: N/A
+ *
+ * atomic_val_t atomic_clear
+ *    (
+ *    atomic_t *target	/@ memory location to clear @/
+ *    )
+ */
+
+SECTION_SUBSEC_FUNC(TEXT, atomic_clear_set, atomic_clear)
+	mov_s r1, 0
+	/* fall through into atomic_set */
+
+/**
+ *
+ * @brief Atomically set a memory location
+ *
+ * This routine atomically sets the contents of <target> to <value> and returns
+ * the old value that was in <target>.
+ *
+ * This routine can be used from both task and interrupt level.
+ *
+ * @return Contents of <target> before the atomic operation
+ *
+ * ERRNO: N/A
+ *
+ * atomic_val_t atomic_set
+ *    (
+ *    atomic_t *target,	/@ memory location to set @/
+ *    atomic_val_t value	/@ set with this value @/
+ *    )
+ *
+ */
+
+SECTION_SUBSEC_FUNC(TEXT, atomic_clear_set, atomic_set)
+
+	ex r1, [r0]		/* swap new value with old value */
+
+	j_s.d [blink]
+	mov_s r0, r1		/* return old value */
+
+/**
+ *
+ * @brief Get the value of a shared memory atomically
+ *
+ * This routine atomically retrieves the value in *target
+ *
+ * atomic_val_t atomic_get
+ *     (
+ *     atomic_t *target    /@ address of atom to be retrieved @/
+ *     )
+ *
+ * RETURN: value read from address target.
+ *
+ */
+
+SECTION_FUNC(TEXT, atomic_get)
+	ld_s r0, [r0, 0]
+	j_s [blink]
+
+/**
+ *
+ * @brief Atomically increment a memory location
+ *
+ * This routine atomically increments the value in <target>.  The operation is
+ * done using unsigned integer arithmetic.  Various CPU architectures may impose
+ * restrictions with regards to the alignment and cache attributes of the
+ * atomic_t type.
+ *
+ * This routine can be used from both task and interrupt level.
+ *
+ * @return Contents of <target> before the atomic operation
+ *
+ * ERRNO: N/A
+ *
+ * atomic_val_t atomic_inc
+ *    (
+ *    atomic_t *target,	/@ memory location to increment @/
+ *    )
+ *
+ */
+
+SECTION_SUBSEC_FUNC(TEXT, atomic_inc_add, atomic_inc)
+	mov_s r1, 1
+	/* fall through into atomic_add */
+
+/**
+ *
+ * @brief Atomically add a value to a memory location
+ *
+ * This routine atomically adds the contents of <target> and <value>, placing
+ * the result in <target>. The operation is done using signed integer arithmetic.
+ * Various CPU architectures may impose restrictions with regards to the
+ * alignment and cache attributes of the atomic_t type.
+ *
+ * This routine can be used from both task and interrupt level.
+ *
+ * @return Contents of <target> before the atomic operation
+ *
+ * ERRNO: N/A
+ *
+ * atomic_val_t atomic_add
+ *    (
+ *    atomic_t *target,	/@ memory location to add to @/
+ *    atomic_val_t value	/@ value to add @/
+ *    )
+ */
+
+SECTION_SUBSEC_FUNC(TEXT, atomic_inc_add, atomic_add)
+
+	llock r2, [r0]	/* load old value and mark exclusive access */
+	add_s r3, r1, r2
+	scond r3, [r0]	/* try to store new value */
+
+	/* STATUS32.Z = 1 if successful */
+
+	bne_s atomic_add  /* if store is not successful, retry */
+
+	j_s.d [blink]
+	mov_s r0, r2		/* return old value */
+
+/**
+ *
+ * @brief Atomically decrement a memory location
+ *
+ * This routine atomically decrements the value in <target>.  The operation is
+ * done using unsigned integer arithmetic.  Various CPU architectures may impose
+ * restrictions with regards to the alignment and cache attributes of the
+ * atomic_t type.
+ *
+ * This routine can be used from both task and interrupt level.
+ *
+ * @return Contents of <target> before the atomic operation
+ *
+ * ERRNO: N/A
+ *
+ * atomic_val_t atomic_dec
+ *    (
+ *    atomic_t *target,	/@ memory location to decrement @/
+ *    )
+ *
+ */
+
+SECTION_SUBSEC_FUNC(TEXT, atomic_dec_sub, atomic_dec)
+	mov_s r1, 1
+	/* fall through into atomic_sub */
+
+/**
+ *
+ * @brief Atomically subtract a value from a memory location
+ *
+ * This routine atomically subtracts <value> from the contents of <target>,
+ * placing the result in <target>.  The operation is done using signed integer
+ * arithmetic. Various CPU architectures may impose restrictions with regards to
+ * the alignment and cache attributes of the atomic_t type.
+ *
+ * This routine can be used from both task and interrupt level.
+ *
+ * @return Contents of <target> before the atomic operation
+ *
+ * ERRNO: N/A
+ *
+ * atomic_val_t atomic_sub
+ *    (
+ *    atomic_t *target,	/@ memory location to subtract from @/
+ *    atomic_val_t value	/@ value to subtract @/
+ *    )
+ *
+ */
+
+SECTION_SUBSEC_FUNC(TEXT, atomic_dec_sub, atomic_sub)
+
+	llock r2, [r0]	/* load old value and mark exclusive access */
+	sub r3, r2, r1
+	scond r3, [r0]	/* try to store new value */
+
+	/* STATUS32.Z = 1 if successful */
+
+	bne_s atomic_sub  /* if store is not successful, retry */
+
+	j_s.d [blink]
+	mov_s r0, r2		/* return old value */
+
+/**
+ *
+ * @brief Atomically perform a bitwise NAND on a memory location
+ *
+ * This routine atomically performs a bitwise NAND operation of the contents of
+ * <target> and <value>, placing the result in <target>.
+ * Various CPU architectures may impose restrictions with regards to the
+ * alignment and cache attributes of the atomic_t type.
+ *
+ * This routine can be used from both task and interrupt level.
+ *
+ * @return Contents of <target> before the atomic operation
+ *
+ * ERRNO: N/A
+ *
+ * atomic_val_t atomic_nand
+ *    (
+ *    atomic_t *target,	/@ memory location to NAND @/
+ *    atomic_val_t value	/@ NAND with this value @/
+ *    )
+ *
+ */
+
+SECTION_FUNC(TEXT, atomic_nand)
+
+	llock r2, [r0]	/* load old value and mark exclusive access */
+	and r3, r1, r2
+	not r3, r3
+	scond r3, [r0]	/* try to store new value */
+
+	/* STATUS32.Z = 1 if successful */
+
+	bne_s atomic_nand  /* if store is not successful, retry */
+
+	j_s.d [blink]
+	mov_s r0, r2		/* return old value */
+
+/**
+ *
+ * @brief Atomically perform a bitwise AND on a memory location
+ *
+ * This routine atomically performs a bitwise AND operation of the contents of
+ * <target> and <value>, placing the result in <target>.
+ * Various CPU architectures may impose restrictions with regards to the
+ * alignment and cache attributes of the atomic_t type.
+ *
+ * This routine can be used from both task and interrupt level.
+ *
+ * @return Contents of <target> before the atomic operation
+ *
+ * ERRNO: N/A
+ *
+ * atomic_val_t atomic_and
+ *    (
+ *    atomic_t *target,	/@ memory location to AND @/
+ *    atomic_val_t value	/@ AND with this value @/
+ *    )
+ *
+ */
+
+SECTION_FUNC(TEXT, atomic_and)
+
+	llock r2, [r0]	/* load old value and mark exclusive access */
+	and r3, r1, r2
+	scond r3, [r0]	/* try to store new value */
+
+	/* STATUS32.Z = 1 if successful */
+
+	bne_s atomic_and  /* if store is not successful, retry */
+
+	j_s.d [blink]
+	mov_s r0, r2		/* return old value */
+
+/**
+ *
+ * @brief Atomically perform a bitwise OR on memory location
+ *
+ * This routine atomically performs a bitwise OR operation of the contents of
+ * <target> and <value>, placing the result in <target>.
+ * Various CPU architectures may impose restrictions with regards to the
+ * alignment and cache attributes of the atomic_t type.
+ *
+ * This routine can be used from both task and interrupt level.
+ *
+ * @return Contents of <target> before the atomic operation
+ *
+ * ERRNO: N/A
+ *
+ * atomic_val_t atomic_or
+ *    (
+ *    atomic_t *target,	/@ memory location to OR @/
+ *    atomic_val_t value	/@ OR with this value @/
+ *    )
+ *
+ */
+
+SECTION_FUNC(TEXT, atomic_or)
+
+	llock r2, [r0]	/* load old value and mark exclusive access */
+	or r3, r1, r2
+	scond r3, [r0]	/* try to store new value */
+
+	/* STATUS32.Z = 1 if successful */
+
+	bne_s atomic_or  /* if store is not successful, retry */
+
+	j_s.d [blink]
+	mov_s r0, r2		/* return old value */
+
+/**
+ *
+ * @brief Atomically perform a bitwise XOR on a memory location
+ *
+ * This routine atomically performs a bitwise XOR operation of the contents of
+ * <target> and <value>, placing the result in <target>.
+ * Various CPU architectures may impose restrictions with regards to the
+ * alignment and cache attributes of the atomic_t type.
+ *
+ * This routine can be used from both task and interrupt level.
+ *
+ * @return Contents of <target> before the atomic operation
+ *
+ * ERRNO: N/A
+ *
+ * atomic_val_t atomic_xor
+ *    (
+ *    atomic_t *target,	/@ memory location to XOR @/
+ *    atomic_val_t value	/@ XOR with this value @/
+ *    )
+ *
+ */
+
+SECTION_FUNC(TEXT, atomic_xor)
+
+	llock r2, [r0]	/* load old value and mark exclusive access */
+	xor r3, r1, r2
+	scond r3, [r0]	/* try to store new value */
+
+	/* STATUS32.Z = 1 if successful */
+
+	bne_s atomic_xor  /* if store is not successful, retry */
+
+	j_s.d [blink]
+	mov_s r0, r2		/* return old value */
+
+/**
+ *
+ * @brief Atomically compare-and-swap the contents of a memory location
+ *
+ * This routine performs an atomic compare-and-swap. testing that the contents of
+ * <target> contains <oldValue>, and if it does, setting the value of <target>
+ * to <newValue>. Various CPU architectures may impose restrictions with regards
+ * to the alignment and cache attributes of the atomic_t type.
+ *
+ * This routine can be used from both task and interrupt level.
+ *
+ * @return 1 if the swap is actually executed, 0 otherwise.
+ *
+ * ERRNO: N/A
+ *
+ * int atomic_cas
+ *    (
+ *    atomic_t *target,	    /@ memory location to compare-and-swap @/
+ *    atomic_val_t oldValue,	/@ compare to this value @/
+ *    atomic_val_t newValue,	/@ swap with this value @/
+ *    )
+ *
+ */
+
+SECTION_FUNC(TEXT, atomic_cas)
+
+	llock r3, [r0]	/* load old value and mark exclusive access */
+	cmp_s r1, r3
+
+	bne_s nanoAtomicCas_fail
+
+	scond r2, [r0]	/* try to store new value */
+
+	/* STATUS32.Z = 1 if successful */
+
+	bne_s atomic_cas  /* if store is not successful, retry */
+
+	j_s.d [blink]
+	mov_s r0, 1		/* return TRUE */
+
+	/* failed comparison */
+nanoAtomicCas_fail:
+	scond r1, [r0]	/* write old value to clear the access lock */
+	j_s.d [blink]
+	mov_s r0, 0	/* return FALSE */

arch/arc/core/cache.c

@@ -15,18 +15,25 @@
 
 #include <kernel.h>
 #include <arch/cpu.h>
-#include <sys/util.h>
+#include <misc/util.h>
 #include <toolchain.h>
 #include <cache.h>
 #include <linker/linker-defs.h>
 #include <arch/arc/v2/aux_regs.h>
-#include <kernel_internal.h>
-#include <sys/__assert.h>
+#include <nano_internal.h>
+#include <misc/__assert.h>
 #include <init.h>
-#include <stdbool.h>
 
-#if defined(CONFIG_DCACHE_LINE_SIZE_DETECT)
-size_t sys_cache_line_size;
+#if defined(CONFIG_CACHE_FLUSHING)
+
+#if (CONFIG_CACHE_LINE_SIZE == 0) && !defined(CONFIG_CACHE_LINE_SIZE_DETECT)
+#error Cannot use this implementation with a cache line size of 0
+#endif
+
+#if defined(CONFIG_CACHE_LINE_SIZE_DETECT)
+#define DCACHE_LINE_SIZE sys_cache_line_size
+#else
+#define DCACHE_LINE_SIZE CONFIG_CACHE_LINE_SIZE
 #endif
 
 #define DC_CTRL_DC_ENABLE            0x0  /* enable d-cache */
@@ -41,129 +48,120 @@ size_t sys_cache_line_size;
 #define DC_CTRL_OP_SUCCEEDED         0x4  /* d-cache operation succeeded */
 
 
-static bool dcache_available(void)
+static int dcache_available(void)
 {
-	unsigned long val = z_arc_v2_aux_reg_read(_ARC_V2_D_CACHE_BUILD);
+	unsigned long val = _arc_v2_aux_reg_read(_ARC_V2_D_CACHE_BUILD);
 
 	val &= 0xff; /* extract version */
-	return (val == 0) ? false : true;
+	return (val == 0)?0:1;
 }
 
-static void dcache_dc_ctrl(uint32_t dcache_en_mask)
+static void dcache_dc_ctrl(u32_t dcache_en_mask)
 {
-	if (dcache_available()) {
-		z_arc_v2_aux_reg_write(_ARC_V2_DC_CTRL, dcache_en_mask);
-	}
+	if (!dcache_available())
+		return;
+	_arc_v2_aux_reg_write(_ARC_V2_DC_CTRL, dcache_en_mask);
 }
 
-void arch_dcache_enable(void)
+static void dcache_enable(void)
 {
 	dcache_dc_ctrl(DC_CTRL_DC_ENABLE);
 }
 
-static void arch_dcache_flush(void *start_addr_ptr, size_t size)
+
+/**
+ *
+ * @brief Flush multiple d-cache lines to memory
+ *
+ * No alignment is required for either <start_addr> or <size>, but since
+ * dcache_flush_mlines() iterates on the d-cache lines, a cache line
+ * alignment for both is optimal.
+ *
+ * The d-cache line size is specified either via the CONFIG_CACHE_LINE_SIZE
+ * kconfig option or it is detected at runtime.
+ *
+ * @param start_addr the pointer to start the multi-line flush
+ * @param size the number of bytes that are to be flushed
+ *
+ * @return N/A
+ */
+static void dcache_flush_mlines(u32_t start_addr, u32_t size)
 {
-	size_t line_size = sys_cache_data_line_size_get();
-	uintptr_t start_addr = (uintptr_t)start_addr_ptr;
-	uintptr_t end_addr;
+	u32_t end_addr;
 	unsigned int key;
 
-	if (!dcache_available() || (size == 0U) || line_size == 0U) {
+	if (!dcache_available() || (size == 0)) {
 		return;
 	}
 
-	end_addr = start_addr + size;
+	end_addr = start_addr + size - 1;
+	start_addr &= (u32_t)(~(DCACHE_LINE_SIZE - 1));
 
-	start_addr = ROUND_DOWN(start_addr, line_size);
-
-	key = arch_irq_lock(); /* --enter critical section-- */
+	key = irq_lock(); /* --enter critical section-- */
 
 	do {
-		z_arc_v2_aux_reg_write(_ARC_V2_DC_FLDL, start_addr);
-		__builtin_arc_nop();
-		__builtin_arc_nop();
-		__builtin_arc_nop();
+		_arc_v2_aux_reg_write(_ARC_V2_DC_FLDL, start_addr);
+		__asm__ volatile("nop_s");
+		__asm__ volatile("nop_s");
+		__asm__ volatile("nop_s");
 		/* wait for flush completion */
 		do {
-			if ((z_arc_v2_aux_reg_read(_ARC_V2_DC_CTRL) &
-			     DC_CTRL_FLUSH_STATUS) == 0) {
+			if ((_arc_v2_aux_reg_read(_ARC_V2_DC_CTRL) &
+				DC_CTRL_FLUSH_STATUS) == 0)
 				break;
-			}
 		} while (1);
-		start_addr += line_size;
-	} while (start_addr < end_addr);
+		start_addr += DCACHE_LINE_SIZE;
+	} while (start_addr <= end_addr);
 
-	arch_irq_unlock(key); /* --exit critical section-- */
+	irq_unlock(key); /* --exit critical section-- */
 
 }
 
-static void arch_dcache_invd(void *start_addr_ptr, size_t size)
+
+/**
+ *
+ * @brief Flush d-cache lines to main memory
+ *
+ * No alignment is required for either <virt> or <size>, but since
+ * sys_cache_flush() iterates on the d-cache lines, a d-cache line alignment for
+ * both is optimal.
+ *
+ * The d-cache line size is specified either via the CONFIG_CACHE_LINE_SIZE
+ * kconfig option or it is detected at runtime.
+ *
+ * @param start_addr the pointer to start the multi-line flush
+ * @param size the number of bytes that are to be flushed
+ *
+ * @return N/A
+ */
+
+void sys_cache_flush(vaddr_t start_addr, size_t size)
 {
-	size_t line_size = sys_cache_data_line_size_get();
-	uintptr_t start_addr = (uintptr_t)start_addr_ptr;
-	uintptr_t end_addr;
-	unsigned int key;
-
-	if (!dcache_available() || (size == 0U) || line_size == 0U) {
-		return;
-	}
-	end_addr = start_addr + size;
-	start_addr = ROUND_DOWN(start_addr, line_size);
-
-	key = arch_irq_lock(); /* -enter critical section- */
-
-	do {
-		z_arc_v2_aux_reg_write(_ARC_V2_DC_IVDL, start_addr);
-		__builtin_arc_nop();
-		__builtin_arc_nop();
-		__builtin_arc_nop();
-		start_addr += line_size;
-	} while (start_addr < end_addr);
-	irq_unlock(key); /* -exit critical section- */
+	dcache_flush_mlines((u32_t)start_addr, (u32_t)size);
 }
 
-int arch_dcache_range(void *addr, size_t size, int op)
-{
-	if (op == K_CACHE_INVD) {
-		/*
-		 * TODO: On invalidate we can contextually flush by setting the
-		 * DC_CTRL_INVALID_FLUSH bit
-		 */
-		arch_dcache_invd(addr, size);
-	} else if (op == K_CACHE_WB) {
-		arch_dcache_flush(addr, size);
-	} else {
-		return -ENOTSUP;
-	}
 
-	return 0;
-}
-
-#if defined(CONFIG_DCACHE_LINE_SIZE_DETECT)
+#if defined(CONFIG_CACHE_LINE_SIZE_DETECT)
+size_t sys_cache_line_size;
 static void init_dcache_line_size(void)
 {
-	uint32_t val;
+	u32_t val;
 
-	val = z_arc_v2_aux_reg_read(_ARC_V2_D_CACHE_BUILD);
-	__ASSERT((val&0xff) != 0U, "d-cache is not present");
+	val = _arc_v2_aux_reg_read(_ARC_V2_D_CACHE_BUILD);
+	__ASSERT((val&0xff) != 0, "d-cache is not present");
 	val = ((val>>16) & 0xf) + 1;
-	val *= 16U;
+	val *= 16;
 	sys_cache_line_size = (size_t) val;
 }
-
-size_t arch_dcache_line_size_get(void)
-{
-	return sys_cache_line_size;
-}
 #endif
 
-static int init_dcache(const struct device *unused)
+static int init_dcache(struct device *unused)
 {
 	ARG_UNUSED(unused);
 
-	arch_dcache_enable();
+	dcache_enable();
 
-#if defined(CONFIG_DCACHE_LINE_SIZE_DETECT)
+#if defined(CONFIG_CACHE_LINE_SIZE_DETECT)
 	init_dcache_line_size();
 #endif
 
@@ -171,3 +169,6 @@ static int init_dcache(const struct device *unused)
 }
 
 SYS_INIT(init_dcache, PRE_KERNEL_1, CONFIG_KERNEL_INIT_PRIORITY_DEFAULT);
+
+#endif /* CONFIG_CACHE_FLUSHING */
+

arch/arc/core/cpu_idle.S

@@ -16,14 +16,13 @@
 #include <toolchain.h>
 #include <linker/sections.h>
 #include <arch/cpu.h>
-#include <arch/arc/asm-compat/assembler.h>
 
-GTEXT(arch_cpu_idle)
-GTEXT(arch_cpu_atomic_idle)
-GDATA(z_arc_cpu_sleep_mode)
+GTEXT(k_cpu_idle)
+GTEXT(k_cpu_atomic_idle)
+GDATA(k_cpu_sleep_mode)
 
-SECTION_VAR(BSS, z_arc_cpu_sleep_mode)
-	.align 4
+SECTION_VAR(BSS, k_cpu_sleep_mode)
+	.balign 4
 	.word 0
 
 /*
@@ -34,16 +33,15 @@ SECTION_VAR(BSS, z_arc_cpu_sleep_mode)
  * void nanCpuIdle(void)
  */
 
-SECTION_FUNC(TEXT, arch_cpu_idle)
+SECTION_FUNC(TEXT, k_cpu_idle)
 
-#ifdef CONFIG_TRACING
-	PUSHR blink
-	jl    sys_trace_idle
-	POPR blink
+#ifdef CONFIG_KERNEL_EVENT_LOGGER_SLEEP
+	push_s blink
+	jl    _sys_k_event_logger_enter_sleep
+	pop_s blink
 #endif
 
-	/* z_arc_cpu_sleep_mode is 32 bit despite of platform bittnes */
-	ld r1, [z_arc_cpu_sleep_mode]
+	ld r1, [k_cpu_sleep_mode]
 	or r1, r1, (1 << 4) /* set IRQ-enabled bit */
 	sleep r1
 	j_s [blink]
@@ -54,18 +52,17 @@ SECTION_FUNC(TEXT, arch_cpu_idle)
  *
  * This function exits with interrupts restored to <key>.
  *
- * void arch_cpu_atomic_idle(unsigned int key)
+ * void k_cpu_atomic_idle(unsigned int key)
  */
-SECTION_FUNC(TEXT, arch_cpu_atomic_idle)
+SECTION_FUNC(TEXT, k_cpu_atomic_idle)
 
-#ifdef CONFIG_TRACING
-	PUSHR blink
-	jl    sys_trace_idle
-	POPR blink
+#ifdef CONFIG_KERNEL_EVENT_LOGGER_SLEEP
+	push_s blink
+	jl    _sys_k_event_logger_enter_sleep
+	pop_s blink
 #endif
 
-	/* z_arc_cpu_sleep_mode is 32 bit despite of platform bittnes */
-	ld r1, [z_arc_cpu_sleep_mode]
+	ld r1, [k_cpu_sleep_mode]
 	or r1, r1, (1 << 4) /* set IRQ-enabled bit */
 	sleep r1
 	j_s.d [blink]

arch/arc/core/fast_irq.S

@@ -16,13 +16,19 @@
 #include <kernel_structs.h>
 #include <offsets_short.h>
 #include <toolchain.h>
-#include <linker/sections.h>
 #include <arch/cpu.h>
 #include <swap_macros.h>
 
 GTEXT(_firq_enter)
 GTEXT(_firq_exit)
 
+GDATA(exc_nest_count)
+#if CONFIG_RGF_NUM_BANKS == 1
+GDATA(saved_r0)
+#else
+GDATA(saved_sp)
+#endif
+
 /**
  *
  * @brief Work to be done before handing control to a FIRQ ISR
@@ -54,19 +60,14 @@ SECTION_FUNC(TEXT, _firq_enter)
  * This has already been done by _isr_wrapper.
  */
 #ifdef CONFIG_ARC_STACK_CHECKING
-#ifdef CONFIG_ARC_SECURE_FIRMWARE
-	lr r2, [_ARC_V2_SEC_STAT]
-	bclr r2, r2, _ARC_V2_SEC_STAT_SSC_BIT
-	sflag r2
-#else
 	/* disable stack checking */
 	lr r2, [_ARC_V2_STATUS32]
 	bclr r2, r2, _ARC_V2_STATUS32_SC_BIT
 	kflag r2
 #endif
-#endif
 
 #if CONFIG_RGF_NUM_BANKS != 1
+#ifndef CONFIG_FIRQ_NO_LPCC
 	/*
 	 * Save LP_START/LP_COUNT/LP_END because called handler might use.
 	 * Save these in callee saved registers to avoid using memory.
@@ -75,58 +76,41 @@ SECTION_FUNC(TEXT, _firq_enter)
 	mov r23,lp_count
 	lr r24, [_ARC_V2_LP_START]
 	lr r25, [_ARC_V2_LP_END]
+#endif
 #endif
 
-	/* check whether irq stack is used */
-	_check_and_inc_int_nest_counter r0, r1
+	ld r1, [exc_nest_count]
+	add r0, r1, 1
+	st r0, [exc_nest_count]
+	cmp r1, 0
 
-	bne.d firq_nest
-	mov_s r0, sp
+	bgt.d  firq_nest
+	mov r0, sp
 
-	_get_curr_cpu_irq_stack sp
+	mov r1, _kernel
+	ld sp, [r1, _kernel_offset_to_irq_stack]
 #if CONFIG_RGF_NUM_BANKS != 1
 	b firq_nest_1
 firq_nest:
-	/*
-	 * because firq and rirq share the same interrupt stack,
-	 * switch back to original register bank to get correct sp.
-	 * to get better firq latency, an approach is to prepare
-	 * separate interrupt stack for firq and do not do thread
-	 * switch in firq.
-	 */
-	lr r1, [_ARC_V2_STATUS32]
-	and r1, r1, ~_ARC_V2_STATUS32_RB(7)
-	kflag r1
+	mov r1, ilink
+	lr r0, [_ARC_V2_STATUS32]
+	and r0, r0, ~_ARC_V2_STATUS32_RB(7)
+	kflag r0
 
-	/* here use _ARC_V2_USER_SP and ilink to exchange sp
-	 * save original value of _ARC_V2_USER_SP and ilink into
-	 * the stack of interrupted context first, then restore them later
-	 */
-	push ilink
-	PUSHAX ilink, _ARC_V2_USER_SP
+	st sp, [saved_sp]
 
-	/* sp here is the sp of interrupted context */
-	sr sp, [_ARC_V2_USER_SP]
-	/* here, bank 0 sp must go back to the value before push and
-	 * PUSHAX as we will switch to bank1, the pop and POPAX later will
-	 * change bank1's sp, not bank0's sp
-	 */
-	add sp, sp, 8
-
-	/* switch back to banked reg, only ilink can be used */
 	lr ilink, [_ARC_V2_STATUS32]
 	or ilink, ilink, _ARC_V2_STATUS32_RB(1)
 	kflag ilink
-	lr sp, [_ARC_V2_USER_SP]
-
-	POPAX ilink, _ARC_V2_USER_SP
-	pop ilink
+	mov r0, sp
+	ld sp, [saved_sp]
+	mov ilink, r1
 firq_nest_1:
 #else
 firq_nest:
 #endif
 	push_s r0
-	j _isr_demux
+	j @_isr_demux
 
 
 
@@ -139,92 +123,103 @@ firq_nest:
 
 SECTION_FUNC(TEXT, _firq_exit)
 
+	pop sp
+
 #if CONFIG_RGF_NUM_BANKS != 1
+#ifndef CONFIG_FIRQ_NO_LPCC
 	/* restore lp_count, lp_start, lp_end from r23-r25 */
 	mov lp_count,r23
 	sr r24, [_ARC_V2_LP_START]
 	sr r25, [_ARC_V2_LP_END]
 #endif
-	_dec_int_nest_counter r0, r1
+#endif
+	/* check if we're a nested interrupt: if so, let the interrupted
+	 * interrupt handle the reschedule */
+	mov	r1, exc_nest_count
+	ld	r0, [r1]
+	sub	r0, r0, 1
+	cmp	r0, 0
+	bne.d	_firq_no_reschedule
+	st	r0, [r1]
 
-	_check_nest_int_by_irq_act r0, r1
+#ifdef CONFIG_PREEMPT_ENABLED
 
-	jne _firq_no_switch
+	mov_s r1, _kernel
+	ld_s r2, [r1, _kernel_offset_to_current]
 
-	/* sp is struct k_thread **old of z_arc_switch_in_isr
-	 * which is a wrapper of z_get_next_switch_handle.
-	 * r0 contains the 1st thread in ready queue. if
-	 * it equals _current(r2) ,then do swap, or no swap.
+	/*
+	 * Non-preemptible thread ? Do not schedule (see explanation of
+	 * preempt field in kernel_struct.h).
 	 */
-	_get_next_switch_handle
+	ldh_s r0, [r2, _thread_offset_to_preempt]
+	brhs r0, _NON_PREEMPT_THRESHOLD, _firq_no_reschedule
 
-	cmp r0, r2
-	bne _firq_switch
+	/* Check if the current thread (in r2) is the cached thread */
+	ld_s r0, [r1, _kernel_offset_to_ready_q_cache]
+	brne r0, r2, _firq_reschedule
 
-	/* fall to no switch */
+	/* fall to no rescheduling */
 
-.align 4
-_firq_no_switch:
-	/* restore interrupted context' sp */
-	pop sp
+#endif /* CONFIG_PREEMPT_ENABLED */
+
+.balign 4
+_firq_no_reschedule:
 	/*
 	 * Keeping this code block close to those that use it allows using brxx
 	 * instruction instead of a pair of cmp and bxx
 	 */
 #if CONFIG_RGF_NUM_BANKS == 1
-	_pop_irq_stack_frame
+	add sp,sp,4 /* don't need r0 from stack */
+	pop_s r1
+	pop_s r2
+	pop_s r3
+	pop r4
+	pop r5
+	pop r6
+	pop r7
+	pop r8
+	pop r9
+	pop r10
+	pop r11
+	pop_s r12
+	pop_s r13
+	pop_s blink
+	pop_s r0
+	sr r0, [_ARC_V2_LP_END]
+	pop_s r0
+	sr r0, [_ARC_V2_LP_START]
+	pop_s r0
+	mov lp_count,r0
+#ifdef CONFIG_CODE_DENSITY
+	pop_s r0
+	sr r0, [_ARC_V2_EI_BASE]
+	pop_s r0
+	sr r0, [_ARC_V2_LDI_BASE]
+	pop_s r0
+	sr r0, [_ARC_V2_JLI_BASE]
+#endif
+	ld r0,[saved_r0]
+	add sp,sp,8 /* don't need ilink & status32_po from stack */
 #endif
 	rtie
 
-.align 4
-_firq_switch:
-	/* restore interrupted context' sp */
-	pop sp
+#ifdef CONFIG_PREEMPT_ENABLED
+
+.balign 4
+_firq_reschedule:
 
 #if CONFIG_RGF_NUM_BANKS != 1
-/*
- * save r0, r2 in irq stack for a while, as they will be changed by register
- * bank switch
- */
-	_get_curr_cpu_irq_stack r1
-	st r0, [r1, -4]
-	st r2, [r1, -8]
-
 	/*
 	 * We know there is no interrupted interrupt of lower priority at this
 	 * point, so when switching back to register bank 0, it will contain the
 	 * registers from the interrupted thread.
 	 */
-#if defined(CONFIG_USERSPACE)
-/* when USERSPACE is configured, here need to consider the case where firq comes
- * out in user mode, according to ARCv2 ISA and nsim, the following micro ops
- * will be executed:
- *	sp<-reg bank1'sp
- *      switch between sp and _ARC_V2_USER_SP
- * then:
- *      sp is the sp of kernel stack of interrupted thread
- *      _ARC_V2_USER_SP is reg bank1'sp
- *      the sp of user stack of interrupted thread is reg bank0'sp
- * if firq comes out in kernel mode, the following micro ops will be executed:
- *      sp<-reg bank'sp
- * so, sw needs to do necessary handling to set up the correct sp
- */
-	lr r0, [_ARC_V2_AUX_IRQ_ACT]
-	bbit0 r0, 31, _firq_from_kernel
-	aex sp, [_ARC_V2_USER_SP]
-	lr r0, [_ARC_V2_STATUS32]
-	and r0, r0, ~_ARC_V2_STATUS32_RB(7)
-	kflag r0
-	aex sp, [_ARC_V2_USER_SP]
-	b _firq_create_irq_stack_frame
-_firq_from_kernel:
-#endif
+
 	/* chose register bank #0 */
 	lr r0, [_ARC_V2_STATUS32]
 	and r0, r0, ~_ARC_V2_STATUS32_RB(7)
 	kflag r0
 
-_firq_create_irq_stack_frame:
 	/* we're back on the outgoing thread's stack */
 	_create_irq_stack_frame
 
@@ -237,56 +232,75 @@ _firq_create_irq_stack_frame:
 	st_s r0, [sp, ___isf_t_status32_OFFSET]
 
 	st ilink, [sp, ___isf_t_pc_OFFSET] /* ilink into pc */
-/*
- * load r0, r2 from irq stack
- */
-	_get_curr_cpu_irq_stack r1
-	ld r0, [r1, -4]
-	ld r2, [r1, -8]
 #endif
-	/* r2 is old thread */
-	_irq_store_old_thread_callee_regs
+
+	mov_s r1, _kernel
+	ld_s r2, [r1, _kernel_offset_to_current]
+
+	_save_callee_saved_regs
 
 	st _CAUSE_FIRQ, [r2, _thread_offset_to_relinquish_cause]
 
-	/* mov new thread (r0) to r2 */
+	ld_s r2, [r1, _kernel_offset_to_ready_q_cache]
+	st_s r2, [r1, _kernel_offset_to_current]
 
-	mov r2, r0
-	_load_new_thread_callee_regs
+#ifdef CONFIG_ARC_STACK_CHECKING
+	/* Use stack top and base registers from restored context */
+	ld r3, [r2, _thread_offset_to_stack_base]
+	sr r3, [_ARC_V2_KSTACK_BASE]
+	ld r3, [r2, _thread_offset_to_stack_top]
+	sr r3, [_ARC_V2_KSTACK_TOP]
+#endif
+	/*
+	 * _load_callee_saved_regs expects incoming thread in r2.
+	 * _load_callee_saved_regs restores the stack pointer.
+	 */
+	_load_callee_saved_regs
 
-	breq r3, _CAUSE_RIRQ, _firq_switch_from_rirq
-	nop_s
-	breq r3, _CAUSE_FIRQ, _firq_switch_from_firq
-	nop_s
+#ifdef CONFIG_MPU_STACK_GUARD
+	push_s r2
+	mov r0, r2
+	bl configure_mpu_stack_guard
+	pop_s r2
+#endif
+
+	ld_s r3, [r2, _thread_offset_to_relinquish_cause]
+
+	breq r3, _CAUSE_RIRQ, _firq_return_from_rirq
+	nop
+	breq r3, _CAUSE_FIRQ, _firq_return_from_firq
+	nop
 
 	/* fall through */
 
-.align 4
-_firq_switch_from_coop:
+.balign 4
+_firq_return_from_coop:
 
-	_set_misc_regs_irq_switch_from_coop
+	ld_s r3, [r2, _thread_offset_to_intlock_key]
+	st  0, [r2, _thread_offset_to_intlock_key]
 
 	/* pc into ilink */
 	pop_s r0
 	mov ilink, r0
 
 	pop_s r0 /* status32 into r0 */
+	/*
+	 * There are only two interrupt lock states: locked and unlocked. When
+	 * entering _Swap(), they are always locked, so the IE bit is unset in
+	 * status32. If the incoming thread had them locked recursively, it
+	 * means that the IE bit should stay unset. The only time the bit
+	 * has to change is if they were not locked recursively.
+	 */
+	and.f r3, r3, (1 << 4)
+	or.nz r0, r0, _ARC_V2_STATUS32_IE
 	sr r0, [_ARC_V2_STATUS32_P0]
 
-#ifdef CONFIG_INSTRUMENT_THREAD_SWITCHING
-	push_s blink
-
-	bl z_thread_mark_switched_in
-
-	pop_s blink
-#endif
+	ld_s r0, [r2, _thread_offset_to_return_value]
 	rtie
 
-.align 4
-_firq_switch_from_rirq:
-_firq_switch_from_firq:
-
-	_set_misc_regs_irq_switch_from_irq
+.balign 4
+_firq_return_from_rirq:
+_firq_return_from_firq:
 
 	_pop_irq_stack_frame
 
@@ -294,12 +308,7 @@ _firq_switch_from_firq:
 	sr ilink, [_ARC_V2_STATUS32_P0]
 	ld ilink, [sp, -8] /* pc into ilink */
 
-#ifdef CONFIG_INSTRUMENT_THREAD_SWITCHING
-	push_s blink
-
-	bl z_thread_mark_switched_in
-
-	pop_s blink
-#endif
 	/* LP registers are already restored, just switch back to bank 0 */
 	rtie
+
+#endif /* CONFIG_PREEMPT_ENABLED */

arch/arc/core/fatal.c

@@ -12,59 +12,79 @@
  * ARCv2 CPUs.
  */
 
-#include <kernel.h>
+#include <kernel_structs.h>
 #include <offsets_short.h>
+#include <toolchain.h>
 #include <arch/cpu.h>
-#include <logging/log.h>
-#include <kernel_arch_data.h>
-#include <arch/arc/v2/exc.h>
+#include <misc/printk.h>
 
-LOG_MODULE_DECLARE(os, CONFIG_KERNEL_LOG_LEVEL);
+const NANO_ESF _default_esf = {
+	0xdeaddead, /* placeholder */
+};
 
-#ifdef CONFIG_ARC_EXCEPTION_DEBUG
-static void dump_arc_esf(const z_arch_esf_t *esf)
+/**
+ *
+ * @brief Kernel fatal error handler
+ *
+ * This routine is called when fatal error conditions are detected by software
+ * and is responsible only for reporting the error. Once reported, it then
+ * invokes the user provided routine _SysFatalErrorHandler() which is
+ * responsible for implementing the error handling policy.
+ *
+ * The caller is expected to always provide a usable ESF. In the event that the
+ * fatal error does not have a hardware generated ESF, the caller should either
+ * create its own or use a pointer to the global default ESF <_default_esf>.
+ *
+ * @return This function does not return.
+ */
+FUNC_NORETURN void _NanoFatalErrorHandler(unsigned int reason,
+							const NANO_ESF *pEsf)
 {
-	LOG_ERR(" r0: 0x%" PRIxPTR "  r1: 0x%" PRIxPTR "  r2: 0x%" PRIxPTR "  r3: 0x%" PRIxPTR "",
-		esf->r0, esf->r1, esf->r2, esf->r3);
-	LOG_ERR(" r4: 0x%" PRIxPTR "  r5: 0x%" PRIxPTR "  r6: 0x%" PRIxPTR "  r7: 0x%" PRIxPTR "",
-		esf->r4, esf->r5, esf->r6, esf->r7);
-	LOG_ERR(" r8: 0x%" PRIxPTR "  r9: 0x%" PRIxPTR " r10: 0x%" PRIxPTR " r11: 0x%" PRIxPTR "",
-		esf->r8, esf->r9, esf->r10, esf->r11);
-	LOG_ERR("r12: 0x%" PRIxPTR " r13: 0x%" PRIxPTR "  pc: 0x%" PRIxPTR "",
-		esf->r12, esf->r13, esf->pc);
-	LOG_ERR(" blink: 0x%" PRIxPTR " status32: 0x%" PRIxPTR "", esf->blink, esf->status32);
-#ifdef CONFIG_ARC_HAS_ZOL
-	LOG_ERR("lp_end: 0x%" PRIxPTR " lp_start: 0x%" PRIxPTR " lp_count: 0x%" PRIxPTR "",
-		esf->lp_end, esf->lp_start, esf->lp_count);
-#endif /* CONFIG_ARC_HAS_ZOL */
-}
+	switch (reason) {
+	case _NANO_ERR_HW_EXCEPTION:
+		break;
+
+	case _NANO_ERR_INVALID_TASK_EXIT:
+		printk("***** Invalid Exit Software Error! *****\n");
+		break;
+
+#if defined(CONFIG_STACK_CANARIES) || defined(CONFIG_ARC_STACK_CHECKING)
+	case _NANO_ERR_STACK_CHK_FAIL:
+		printk("***** Stack Check Fail! *****\n");
+		break;
 #endif
 
-void z_arc_fatal_error(unsigned int reason, const z_arch_esf_t *esf)
-{
-#ifdef CONFIG_ARC_EXCEPTION_DEBUG
-	if (esf != NULL) {
-		dump_arc_esf(esf);
+	case _NANO_ERR_ALLOCATION_FAIL:
+		printk("**** Kernel Allocation Failure! ****\n");
+		break;
+
+	case _NANO_ERR_KERNEL_OOPS:
+		printk("***** Kernel OOPS! *****\n");
+		break;
+
+	case _NANO_ERR_KERNEL_PANIC:
+		printk("***** Kernel Panic! *****\n");
+		break;
+
+	default:
+		printk("**** Unknown Fatal Error %d! ****\n", reason);
+		break;
 	}
-#endif /* CONFIG_ARC_EXCEPTION_DEBUG */
+	printk("Current thread ID = %p\n"
+	       "Faulting instruction address = 0x%lx\n",
+	       k_current_get(),
+	       _arc_v2_aux_reg_read(_ARC_V2_ERET));
 
-	z_fatal_error(reason, esf);
-}
-
-FUNC_NORETURN void arch_syscall_oops(void *ssf_ptr)
-{
-	/* TODO: convert ssf_ptr contents into an esf, they are not the same */
-	ARG_UNUSED(ssf_ptr);
-
-	z_arc_fatal_error(K_ERR_KERNEL_OOPS, NULL);
-	CODE_UNREACHABLE;
-}
-
-FUNC_NORETURN void arch_system_halt(unsigned int reason)
-{
-	ARG_UNUSED(reason);
-
-	__asm__("brk");
-
-	CODE_UNREACHABLE;
+	/*
+	 * Now that the error has been reported, call the user implemented
+	 * policy
+	 * to respond to the error.  The decisions as to what responses are
+	 * appropriate to the various errors are something the customer must
+	 * decide.
+	 */
+
+	_SysFatalErrorHandler(reason, pEsf);
+
+	for (;;)
+		;
 }

arch/arc/core/fault.c

@@ -16,398 +16,39 @@
 #include <inttypes.h>
 
 #include <kernel.h>
-#include <kernel_internal.h>
 #include <kernel_structs.h>
-#include <exc_handle.h>
-#include <logging/log.h>
-LOG_MODULE_DECLARE(os, CONFIG_KERNEL_LOG_LEVEL);
-
-#ifdef CONFIG_USERSPACE
-Z_EXC_DECLARE(z_arc_user_string_nlen);
-
-static const struct z_exc_handle exceptions[] = {
-	Z_EXC_HANDLE(z_arc_user_string_nlen)
-};
-#endif
-
-#if defined(CONFIG_MPU_STACK_GUARD)
-/**
- * @brief Assess occurrence of current thread's stack corruption
- *
- * This function performs an assessment whether a memory fault (on a given
- * memory address) is the result of a stack overflow of the current thread.
- *
- * When called, we know at this point that we received an ARC
- * protection violation, with any cause code, with the protection access
- * error either "MPU" or "Secure MPU". In other words, an MPU fault of
- * some kind. Need to determine whether this is a general MPU access
- * exception or the specific case of a stack overflow.
- *
- * @param fault_addr memory address on which memory access violation
- *                   has been reported.
- * @param sp stack pointer when exception comes out
- * @retval True if this appears to be a stack overflow
- * @retval False if this does not appear to be a stack overflow
- */
-static bool z_check_thread_stack_fail(const uint32_t fault_addr, uint32_t sp)
-{
-	const struct k_thread *thread = _current;
-	uint32_t guard_end, guard_start;
-
-	if (!thread) {
-		/* TODO: Under what circumstances could we get here ? */
-		return false;
-	}
-
-#ifdef CONFIG_USERSPACE
-	if ((thread->base.user_options & K_USER) != 0) {
-		if ((z_arc_v2_aux_reg_read(_ARC_V2_ERSTATUS) &
-		     _ARC_V2_STATUS32_U) != 0) {
-			/* Normal user mode context. There is no specific
-			 * "guard" installed in this case, instead what's
-			 * happening is that the stack pointer is crashing
-			 * into the privilege mode stack buffer which
-			 * immediately precededs it.
-			 */
-			guard_end = thread->stack_info.start;
-			guard_start = (uint32_t)thread->stack_obj;
-		} else {
-			/* Special case: handling a syscall on privilege stack.
-			 * There is guard memory reserved immediately before
-			 * it.
-			 */
-			guard_end = thread->arch.priv_stack_start;
-			guard_start = guard_end - Z_ARC_STACK_GUARD_SIZE;
-		}
-	} else
-#endif /* CONFIG_USERSPACE */
-	{
-		/* Supervisor thread */
-		guard_end = thread->stack_info.start;
-		guard_start = guard_end - Z_ARC_STACK_GUARD_SIZE;
-	}
-
-	 /* treat any MPU exceptions within the guard region as a stack
-	  * overflow.As some instrustions
-	  * (like enter_s {r13-r26, fp, blink}) push a collection of
-	  * registers on to the stack. In this situation, the fault_addr
-	  * will less than guard_end, but sp will greater than guard_end.
-	  */
-	if (fault_addr < guard_end && fault_addr >= guard_start) {
-		return true;
-	}
-
-	return false;
-}
-#endif
-
-#ifdef CONFIG_ARC_EXCEPTION_DEBUG
-/* For EV_ProtV, the numbering/semantics of the parameter are consistent across
- * several codes, although not all combination will be reported.
- *
- * These codes and parameters do not have associated* names in
- * the technical manual, just switch on the values in Table 6-5
- */
-static const char *get_protv_access_err(uint32_t parameter)
-{
-	switch (parameter) {
-	case 0x1:
-		return "code protection scheme";
-	case 0x2:
-		return "stack checking scheme";
-	case 0x4:
-		return "MPU";
-	case 0x8:
-		return "MMU";
-	case 0x10:
-		return "NVM";
-	case 0x24:
-		return "Secure MPU";
-	case 0x44:
-		return "Secure MPU with SID mismatch";
-	default:
-		return "unknown";
-	}
-}
-
-static void dump_protv_exception(uint32_t cause, uint32_t parameter)
-{
-	switch (cause) {
-	case 0x0:
-		LOG_ERR("Instruction fetch violation (%s)",
-			get_protv_access_err(parameter));
-		break;
-	case 0x1:
-		LOG_ERR("Memory read protection violation (%s)",
-			get_protv_access_err(parameter));
-		break;
-	case 0x2:
-		LOG_ERR("Memory write protection violation (%s)",
-			get_protv_access_err(parameter));
-		break;
-	case 0x3:
-		LOG_ERR("Memory read-modify-write violation (%s)",
-			get_protv_access_err(parameter));
-		break;
-	case 0x10:
-		LOG_ERR("Normal vector table in secure memory");
-		break;
-	case 0x11:
-		LOG_ERR("NS handler code located in S memory");
-		break;
-	case 0x12:
-		LOG_ERR("NSC Table Range Violation");
-		break;
-	default:
-		LOG_ERR("unknown");
-		break;
-	}
-}
-
-static void dump_machine_check_exception(uint32_t cause, uint32_t parameter)
-{
-	switch (cause) {
-	case 0x0:
-		LOG_ERR("double fault");
-		break;
-	case 0x1:
-		LOG_ERR("overlapping TLB entries");
-		break;
-	case 0x2:
-		LOG_ERR("fatal TLB error");
-		break;
-	case 0x3:
-		LOG_ERR("fatal cache error");
-		break;
-	case 0x4:
-		LOG_ERR("internal memory error on instruction fetch");
-		break;
-	case 0x5:
-		LOG_ERR("internal memory error on data fetch");
-		break;
-	case 0x6:
-		LOG_ERR("illegal overlapping MPU entries");
-		if (parameter == 0x1) {
-			LOG_ERR(" - jump and branch target");
-		}
-		break;
-	case 0x10:
-		LOG_ERR("secure vector table not located in secure memory");
-		break;
-	case 0x11:
-		LOG_ERR("NSC jump table not located in secure memory");
-		break;
-	case 0x12:
-		LOG_ERR("secure handler code not located in secure memory");
-		break;
-	case 0x13:
-		LOG_ERR("NSC target address not located in secure memory");
-		break;
-	case 0x80:
-		LOG_ERR("uncorrectable ECC or parity error in vector memory");
-		break;
-	default:
-		LOG_ERR("unknown");
-		break;
-	}
-}
-
-static void dump_privilege_exception(uint32_t cause, uint32_t parameter)
-{
-	switch (cause) {
-	case 0x0:
-		LOG_ERR("Privilege violation");
-		break;
-	case 0x1:
-		LOG_ERR("disabled extension");
-		break;
-	case 0x2:
-		LOG_ERR("action point hit");
-		break;
-	case 0x10:
-		switch (parameter) {
-		case 0x1:
-			LOG_ERR("N to S return using incorrect return mechanism");
-			break;
-		case 0x2:
-			LOG_ERR("N to S return with incorrect operating mode");
-			break;
-		case 0x3:
-			LOG_ERR("IRQ/exception return fetch from wrong mode");
-			break;
-		case 0x4:
-			LOG_ERR("attempt to halt secure processor in NS mode");
-			break;
-		case 0x20:
-			LOG_ERR("attempt to access secure resource from normal mode");
-			break;
-		case 0x40:
-			LOG_ERR("SID violation on resource access (APEX/UAUX/key NVM)");
-			break;
-		default:
-			LOG_ERR("unknown");
-			break;
-		}
-		break;
-	case 0x13:
-		switch (parameter) {
-		case 0x20:
-			LOG_ERR("attempt to access secure APEX feature from NS mode");
-			break;
-		case 0x40:
-			LOG_ERR("SID violation on access to APEX feature");
-			break;
-		default:
-			LOG_ERR("unknown");
-			break;
-		}
-		break;
-	default:
-		LOG_ERR("unknown");
-		break;
-	}
-}
-
-static void dump_exception_info(uint32_t vector, uint32_t cause, uint32_t parameter)
-{
-	if (vector >= 0x10 && vector <= 0xFF) {
-		LOG_ERR("interrupt %u", vector);
-		return;
-	}
-
-	/* Names are exactly as they appear in Designware ARCv2 ISA
-	 * Programmer's reference manual for easy searching
-	 */
-	switch (vector) {
-	case ARC_EV_RESET:
-		LOG_ERR("Reset");
-		break;
-	case ARC_EV_MEM_ERROR:
-		LOG_ERR("Memory Error");
-		break;
-	case ARC_EV_INS_ERROR:
-		LOG_ERR("Instruction Error");
-		break;
-	case ARC_EV_MACHINE_CHECK:
-		LOG_ERR("EV_MachineCheck");
-		dump_machine_check_exception(cause, parameter);
-		break;
-	case ARC_EV_TLB_MISS_I:
-		LOG_ERR("EV_TLBMissI");
-		break;
-	case ARC_EV_TLB_MISS_D:
-		LOG_ERR("EV_TLBMissD");
-		break;
-	case ARC_EV_PROT_V:
-		LOG_ERR("EV_ProtV");
-		dump_protv_exception(cause, parameter);
-		break;
-	case ARC_EV_PRIVILEGE_V:
-		LOG_ERR("EV_PrivilegeV");
-		dump_privilege_exception(cause, parameter);
-		break;
-	case ARC_EV_SWI:
-		LOG_ERR("EV_SWI");
-		break;
-	case ARC_EV_TRAP:
-		LOG_ERR("EV_Trap");
-		break;
-	case ARC_EV_EXTENSION:
-		LOG_ERR("EV_Extension");
-		break;
-	case ARC_EV_DIV_ZERO:
-		LOG_ERR("EV_DivZero");
-		break;
-	case ARC_EV_DC_ERROR:
-		LOG_ERR("EV_DCError");
-		break;
-	case ARC_EV_MISALIGNED:
-		LOG_ERR("EV_Misaligned");
-		break;
-	case ARC_EV_VEC_UNIT:
-		LOG_ERR("EV_VecUnit");
-		break;
-	default:
-		LOG_ERR("unknown");
-		break;
-	}
-}
-#endif /* CONFIG_ARC_EXCEPTION_DEBUG */
+#include <misc/printk.h>
 
 /*
  * @brief Fault handler
  *
  * This routine is called when fatal error conditions are detected by hardware
  * and is responsible only for reporting the error. Once reported, it then
- * invokes the user provided routine k_sys_fatal_error_handler() which is
+ * invokes the user provided routine _SysFatalErrorHandler() which is
  * responsible for implementing the error handling policy.
+ *
+ * @return This function does not return.
  */
-void _Fault(z_arch_esf_t *esf, uint32_t old_sp)
+void _Fault(void)
 {
-	uint32_t vector, cause, parameter;
-	uint32_t exc_addr = z_arc_v2_aux_reg_read(_ARC_V2_EFA);
-	uint32_t ecr = z_arc_v2_aux_reg_read(_ARC_V2_ECR);
+	u32_t vector, code, parameter;
+	u32_t exc_addr = _arc_v2_aux_reg_read(_ARC_V2_EFA);
+	u32_t ecr = _arc_v2_aux_reg_read(_ARC_V2_ECR);
 
-#ifdef CONFIG_USERSPACE
-	for (int i = 0; i < ARRAY_SIZE(exceptions); i++) {
-		uint32_t start = (uint32_t)exceptions[i].start;
-		uint32_t end = (uint32_t)exceptions[i].end;
-
-		if (esf->pc >= start && esf->pc < end) {
-			esf->pc = (uint32_t)(exceptions[i].fixup);
-			return;
-		}
-	}
-#endif
-
-	vector = Z_ARC_V2_ECR_VECTOR(ecr);
-	cause =  Z_ARC_V2_ECR_CODE(ecr);
-	parameter = Z_ARC_V2_ECR_PARAMETER(ecr);
-
-	/* exception raised by kernel */
-	if (vector == ARC_EV_TRAP && parameter == _TRAP_S_CALL_RUNTIME_EXCEPT) {
-		/*
-		 * in user mode software-triggered system fatal exceptions only allow
-		 * K_ERR_KERNEL_OOPS and K_ERR_STACK_CHK_FAIL
-		 */
-#ifdef CONFIG_USERSPACE
-		if ((esf->status32 & _ARC_V2_STATUS32_U) &&
-			esf->r0 != K_ERR_STACK_CHK_FAIL) {
-			esf->r0 = K_ERR_KERNEL_OOPS;
-		}
-#endif
-
-		z_arc_fatal_error(esf->r0, esf);
-		return;
-	}
-
-	LOG_ERR("***** Exception vector: 0x%x, cause code: 0x%x, parameter 0x%x",
-		vector, cause, parameter);
-	LOG_ERR("Address 0x%x", exc_addr);
-#ifdef CONFIG_ARC_EXCEPTION_DEBUG
-	dump_exception_info(vector, cause, parameter);
-#endif
+	vector = _ARC_V2_ECR_VECTOR(ecr);
+	code =  _ARC_V2_ECR_CODE(ecr);
+	parameter = _ARC_V2_ECR_PARAMETER(ecr);
 
+	printk("Exception vector: 0x%x, cause code: 0x%x, parameter 0x%x\n",
+	       vector, code, parameter);
+	printk("Address 0x%x\n", exc_addr);
 #ifdef CONFIG_ARC_STACK_CHECKING
-	/* Vector 6 = EV_ProV. Regardless of cause, parameter 2 means stack
+	/* Vector 6 = EV_ProV. Regardless of code, parameter 2 means stack
 	 * check violation
-	 * stack check and mpu violation can come out together, then
-	 * parameter = 0x2 | [0x4 | 0x8 | 0x1]
 	 */
-	if (vector == ARC_EV_PROT_V && parameter & 0x2) {
-		z_arc_fatal_error(K_ERR_STACK_CHK_FAIL, esf);
-		return;
+	if (vector == 6 && parameter == 2) {
+		_NanoFatalErrorHandler(_NANO_ERR_STACK_CHK_FAIL, &_default_esf);
 	}
 #endif
-
-#ifdef CONFIG_MPU_STACK_GUARD
-	if (vector == ARC_EV_PROT_V && ((parameter == 0x4) ||
-					(parameter == 0x24))) {
-		if (z_check_thread_stack_fail(exc_addr, old_sp)) {
-			z_arc_fatal_error(K_ERR_STACK_CHK_FAIL, esf);
-			return;
-		}
-	}
-#endif
-	z_arc_fatal_error(K_ERR_CPU_EXCEPTION, esf);
+	_NanoFatalErrorHandler(_NANO_ERR_HW_EXCEPTION, &_default_esf);
 }

arch/arc/core/fault_s.S

@@ -1,6 +1,5 @@
 /*
  * Copyright (c) 2014 Wind River Systems, Inc.
- * Copyright (c) 2018 Synopsys.
  *
  * SPDX-License-Identifier: Apache-2.0
  */
@@ -16,10 +15,9 @@
 #include <linker/sections.h>
 #include <arch/cpu.h>
 #include <swap_macros.h>
-#include <syscall.h>
-#include <arch/arc/asm-compat/assembler.h>
 
 GTEXT(_Fault)
+
 GTEXT(__reset)
 GTEXT(__memory_error)
 GTEXT(__instruction_error)
@@ -34,32 +32,8 @@ GTEXT(__ev_extension)
 GTEXT(__ev_div_zero)
 GTEXT(__ev_dc_error)
 GTEXT(__ev_maligned)
-#ifdef CONFIG_IRQ_OFFLOAD
-GTEXT(z_irq_do_offload);
-#endif
 
-.macro _save_exc_regs_into_stack
-#ifdef CONFIG_ARC_HAS_SECURE
-	/* ERSEC_STAT is IOW/RAZ in normal mode */
-	lr r0,[_ARC_V2_ERSEC_STAT]
-	st_s r0, [sp, ___isf_t_sec_stat_OFFSET]
-#endif
-	LRR r0, [_ARC_V2_ERET]
-	STR r0, sp, ___isf_t_pc_OFFSET
-	LRR r0, [_ARC_V2_ERSTATUS]
-	STR r0, sp, ___isf_t_status32_OFFSET
-.endm
-
-/*
- * The exception handling will use top part of interrupt stack to
- * get smaller memory footprint, because exception is not frequent.
- * To reduce the impact on interrupt handling, especially nested interrupt
- * the top part of interrupt stack cannot be too large, so add a check
- * here
- */
-#if CONFIG_ARC_EXCEPTION_STACK_SIZE > (CONFIG_ISR_STACK_SIZE >> 1)
-#error "interrupt stack size is too small"
-#endif
+GDATA(exc_nest_count)
 
 /*
  * @brief Fault handler installed in the fault and reserved vectors
@@ -73,196 +47,158 @@ SECTION_SUBSEC_FUNC(TEXT,__fault,__ev_tlb_miss_d)
 SECTION_SUBSEC_FUNC(TEXT,__fault,__ev_prot_v)
 SECTION_SUBSEC_FUNC(TEXT,__fault,__ev_privilege_v)
 SECTION_SUBSEC_FUNC(TEXT,__fault,__ev_swi)
+#ifndef CONFIG_IRQ_OFFLOAD
+SECTION_SUBSEC_FUNC(TEXT,__fault,__ev_trap)
+#endif
 SECTION_SUBSEC_FUNC(TEXT,__fault,__ev_extension)
 SECTION_SUBSEC_FUNC(TEXT,__fault,__ev_div_zero)
 SECTION_SUBSEC_FUNC(TEXT,__fault,__ev_dc_error)
 SECTION_SUBSEC_FUNC(TEXT,__fault,__ev_maligned)
 
-_exc_entry:
 	/*
-	 * re-use the top part of interrupt stack as exception
-	 * stack. If this top part is used by interrupt handling,
-	 * and exception is raised, then here it's guaranteed that
-	 * exception handling has necessary stack to use
-	 */
-	MOVR ilink, sp
-	_get_curr_cpu_irq_stack sp
-	SUBR sp, sp, (CONFIG_ISR_STACK_SIZE - CONFIG_ARC_EXCEPTION_STACK_SIZE)
-
-	/*
-	 * save caller saved registers
-	 * this stack frame is set up in exception stack,
-	 * not in the original sp (thread stack or interrupt stack).
-	 * Because the exception may be raised by stack checking or
-	 * mpu protect violation related to stack. If this stack frame
-	 * is setup in original sp, double exception may be raised during
-	 * _create_irq_stack_frame, which is unrecoverable.
-	 */
-	_create_irq_stack_frame
-
-	_save_exc_regs_into_stack
-
-	/* sp is parameter of _Fault */
-	MOVR r0, sp
-	/* ilink is the thread's original sp */
-	MOVR r1, ilink
-	jl _Fault
-
-_exc_return:
-/* the exception cause must be fixed in exception handler when exception returns
- * directly, or exception will be repeated.
- *
- * If thread switch is raised in exception handler, the context of old thread will
- * not be saved, i.e., it cannot be recovered, because we don't know where the
- * exception comes out,  thread context?irq_context?nest irq context?
- */
-
-	_get_next_switch_handle
-
-	BREQR r0, r2, _exc_return_from_exc
-
-	MOVR r2, r0
-
-#ifdef CONFIG_ARC_SECURE_FIRMWARE
-	/*
-	 * sync up the ERSEC_STAT.ERM and SEC_STAT.IRM.
-	 * use a fake interrupt return to simulate an exception turn.
-	 * ERM and IRM record which mode the cpu should return, 1: secure
-	 * 0: normal
-	 */
-	lr r3,[_ARC_V2_ERSEC_STAT]
-	btst r3, 31
-	bset.nz r3, r3, _ARC_V2_SEC_STAT_IRM_BIT
-	bclr.z r3, r3, _ARC_V2_SEC_STAT_IRM_BIT
-	sflag r3
-#endif
-	/* clear AE bit to forget this was an exception, and go to
-	 * register bank0 (if exception is raised in firq with 2 reg
-	 * banks, then we may be bank1)
-	 */
-#if defined(CONFIG_ARC_FIRQ) && CONFIG_RGF_NUM_BANKS != 1
-	/* save r2 in ilink because of the possible following reg
-	 * bank switch
-	 */
-	mov ilink, r2
-#endif
-	LRR r3, [_ARC_V2_STATUS32]
-	ANDR r3, r3, (~(_ARC_V2_STATUS32_AE | _ARC_V2_STATUS32_RB(7)))
-	kflag r3
-	/* pretend lowest priority interrupt happened to use common handler
-	 * if exception is raised in irq, i.e., _ARC_V2_AUX_IRQ_ACT !=0,
-	 * ignore irq handling, we cannot return to irq handling which may
-	 * raise exception again. The ignored interrupts will be re-triggered
-	 * if not cleared, or re-triggered by interrupt sources, or just missed
+	 * Before invoking exception handler, the kernel switches to an exception
+	 * stack, to save the faulting thread's registers.
+	 * The exception is fatal and all the kernel can do is just print
+	 * a diagnostic message and halt.
 	 */
 
-#ifdef CONFIG_ARC_SECURE_FIRMWARE
-	mov_s r3, (1 << (ARC_N_IRQ_START_LEVEL - 1))
-#else
-	MOVR r3, (1 << (CONFIG_NUM_IRQ_PRIO_LEVELS - 1))
-#endif
-
-#ifdef CONFIG_ARC_NORMAL_FIRMWARE
+#ifdef CONFIG_ARC_STACK_CHECKING
 	push_s r2
-	mov_s r0, _ARC_V2_AUX_IRQ_ACT
-	mov_s r1, r3
-	mov_s r6, ARC_S_CALL_AUX_WRITE
-	sjli SJLI_CALL_ARC_SECURE
+	/* disable stack checking */
+	lr r2, [_ARC_V2_STATUS32]
+	bclr r2, r2, _ARC_V2_STATUS32_SC_BIT
+	kflag r2
 	pop_s r2
-#else
-	SRR r3, [_ARC_V2_AUX_IRQ_ACT]
 #endif
 
-#if defined(CONFIG_ARC_FIRQ) && CONFIG_RGF_NUM_BANKS != 1
-	mov r2, ilink
-#endif
-
-	/* Assumption: r2 has next thread */
-	b _rirq_newthread_switch
-
-_exc_return_from_exc:
-	/* exception handler may change return address.
-	 * reload it
-	 */
-	LDR r0, sp, ___isf_t_pc_OFFSET
-	SRR r0, [_ARC_V2_ERET]
-
-	_pop_irq_stack_frame
-	MOVR sp, ilink
-	rtie
-
-/* separated entry for trap which may be used by irq_offload, USERPSACE */
-SECTION_SUBSEC_FUNC(TEXT,__fault,__ev_trap)
-	/* get the id of trap_s */
-	LRR ilink, [_ARC_V2_ECR]
-	ANDR ilink, ilink, 0x3f
-#ifdef CONFIG_USERSPACE
-	cmp ilink, _TRAP_S_CALL_SYSTEM_CALL
-	bne _do_non_syscall_trap
-	/* do sys_call */
-	mov ilink, K_SYSCALL_LIMIT
-	cmp r6, ilink
-	blo valid_syscall_id
-
-	mov_s r0, r6
-	mov_s r6, K_SYSCALL_BAD
-
-valid_syscall_id:
-	/* create a sys call frame
-	 * caller regs (r0 - 12) are saved in _create_irq_stack_frame
-	 * ok to use them later
-	 */
-	_create_irq_stack_frame
-
-	_save_exc_regs_into_stack
-
-	/* exc return and do sys call in kernel mode,
-	 * so need to clear U bit, r0 is already loaded
-	 * with ERSTATUS in _save_exc_regs_into_stack
-	 */
-
-	bclr r0, r0, _ARC_V2_STATUS32_U_BIT
-	sr r0, [_ARC_V2_ERSTATUS]
-
-	mov_s r0, _arc_do_syscall
-	sr r0, [_ARC_V2_ERET]
-
-	rtie
-
-_do_non_syscall_trap:
-#endif /* CONFIG_USERSPACE */
-#ifdef CONFIG_IRQ_OFFLOAD
-	/*
-	 * IRQ_OFFLOAD is to simulate interrupt handling through exception,
-	 * so its entry is different with normal exception handling, it is
-	 * handled in isr stack
-	 */
-	CMPR ilink, _TRAP_S_SCALL_IRQ_OFFLOAD
-	bne _exc_entry
 	/* save caller saved registers */
 	_create_irq_stack_frame
 
-	_save_exc_regs_into_stack
+	lr r0,[_ARC_V2_ERSTATUS]
+	st_s r0, [sp, ___isf_t_status32_OFFSET]
+	lr r0,[_ARC_V2_ERET]
+	st_s r0, [sp, ___isf_t_pc_OFFSET] /* eret into pc */
 
-	/* check whether irq stack is used */
-	_check_and_inc_int_nest_counter r0, r1
 
-	bne.d exc_nest_handle
-	MOVR r0, sp
+	ld r1, [exc_nest_count]
+	add r0, r1, 1
+	st r0, [exc_nest_count]
+	cmp r1, 0
 
-	_get_curr_cpu_irq_stack sp
+	bgt.d  exc_nest_handle
+	mov r0, sp
+
+	mov r1, _kernel
+	ld sp, [r1, _kernel_offset_to_irq_stack]
 exc_nest_handle:
-	PUSHR r0
+	push_s r0
 
-	jl z_irq_do_offload
+	jl _Fault
 
-	POPR sp
+	pop sp
 
-	_dec_int_nest_counter r0, r1
+	mov	r1, exc_nest_count
+	ld	r0, [r1]
+	sub	r0, r0, 1
+	st 	r0, [r1]
 
+	/* if _Fault returns, restore the registers */
 	_pop_irq_stack_frame
 
-	/* ERSTATUS, ERET are not changed, so ok to rtie */
 	rtie
+
+#ifdef CONFIG_IRQ_OFFLOAD
+GTEXT(_irq_do_offload);
+
+SECTION_SUBSEC_FUNC(TEXT,__fault,__ev_trap)
+	/*
+	 * Before invoking exception handler, the kernel switches to an exception
+	 * stack to save the faulting thread's registers.
+	 * The exception is fatal and all the kernel can do is just print
+	 * a diagnostic message and halt.
+	 */
+
+#ifdef CONFIG_ARC_STACK_CHECKING
+	push_s r2
+	/* disable stack checking */
+	lr r2, [_ARC_V2_STATUS32]
+	bclr r2, r2, _ARC_V2_STATUS32_SC_BIT
+	kflag r2
+	pop_s r2
+#endif
+
+	/* save caller saved registers */
+	_create_irq_stack_frame
+
+	lr r0,[_ARC_V2_ERSTATUS]
+	st_s r0, [sp, ___isf_t_status32_OFFSET]
+	lr r0,[_ARC_V2_ERET]
+	st_s r0, [sp, ___isf_t_pc_OFFSET] /* eret into pc */
+
+	ld r1, [exc_nest_count]
+	add r0, r1, 1
+	st r0, [exc_nest_count]
+	cmp r1, 0
+
+	bgt.d  trap_nest_handle
+	mov r0, sp
+
+	mov r1, _kernel
+	ld sp, [r1, _kernel_offset_to_irq_stack]
+trap_nest_handle:
+	push_s r0
+
+	jl _irq_do_offload
+
+	pop sp
+
+	/* check if we're a nested interrupt: if so, let the
+	 * interrupted interrupt handle the reschedule
+	 */
+	mov	r1, exc_nest_count
+	ld	r0, [r1]
+	sub	r0, r0, 1
+	cmp	r0, 0
+	beq.d	_trap_check_for_swap
+	st 	r0, [r1]
+
+_trap_return:
+	_pop_irq_stack_frame
+	rtie
+
+.balign 4
+_trap_check_for_swap:
+	mov_s r1, _kernel
+	ld_s r2, [r1, _kernel_offset_to_current]
+	/*
+	 * Non-preemptible thread ? Do not schedule (see explanation of
+	 * preempt field in kernel_struct.h).
+	 */
+	ldh_s r0, [r2, _thread_offset_to_preempt]
+	brhs r0, _NON_PREEMPT_THRESHOLD, _trap_return
+
+	/* check if the current thread needs to be rescheduled */
+	ld_s r0, [r1, _kernel_offset_to_ready_q_cache]
+	breq r0, r2, _trap_return
+
+	_save_callee_saved_regs
+
+	st _CAUSE_RIRQ, [r2, _thread_offset_to_relinquish_cause]
+	/* note: Ok to use _CAUSE_RIRQ since everything is saved */
+
+	ld_s r2, [r1, _kernel_offset_to_ready_q_cache]
+	st_s r2, [r1, _kernel_offset_to_current]
+
+	/* clear AE bit to forget this was an exception */
+	lr r3, [_ARC_V2_STATUS32]
+	and r3,r3,(~_ARC_V2_STATUS32_AE)
+	kflag r3
+	/* pretend lowest priority interrupt happened to use common handler */
+	lr r3, [_ARC_V2_AUX_IRQ_ACT]
+	or r3,r3,(1<<(CONFIG_NUM_IRQ_PRIO_LEVELS-1)) /* use lowest */
+	sr r3, [_ARC_V2_AUX_IRQ_ACT]
+
+	/* Assumption: r2 has current thread */
+	b _rirq_common_interrupt_swap
+
 #endif /* CONFIG_IRQ_OFFLOAD */
-	b _exc_entry

arch/arc/core/irq_manage.c

@@ -19,69 +19,11 @@
 
 #include <kernel.h>
 #include <arch/cpu.h>
-#include <sys/__assert.h>
+#include <misc/__assert.h>
 #include <toolchain.h>
 #include <linker/sections.h>
 #include <sw_isr_table.h>
 #include <irq.h>
-#include <sys/printk.h>
-
-
-/*
- * storage space for the interrupt stack of fast_irq
- */
-#if defined(CONFIG_ARC_FIRQ_STACK)
-#if defined(CONFIG_SMP)
-K_KERNEL_STACK_ARRAY_DEFINE(_firq_interrupt_stack, CONFIG_MP_NUM_CPUS,
-			    CONFIG_ARC_FIRQ_STACK_SIZE);
-#else
-K_KERNEL_STACK_DEFINE(_firq_interrupt_stack, CONFIG_ARC_FIRQ_STACK_SIZE);
-#endif
-
-/*
- * @brief Set the stack pointer for firq handling
- *
- * @return N/A
- */
-void z_arc_firq_stack_set(void)
-{
-#ifdef CONFIG_SMP
-	char *firq_sp = Z_KERNEL_STACK_BUFFER(
-		  _firq_interrupt_stack[z_arc_v2_core_id()]) +
-		  CONFIG_ARC_FIRQ_STACK_SIZE;
-#else
-	char *firq_sp = Z_KERNEL_STACK_BUFFER(_firq_interrupt_stack) +
-		  CONFIG_ARC_FIRQ_STACK_SIZE;
-#endif
-
-/* the z_arc_firq_stack_set must be called when irq diasbled, as
- * it can be called not only in the init phase but also other places
- */
-	unsigned int key = arch_irq_lock();
-
-	__asm__ volatile (
-/* only ilink will not be banked, so use ilink as channel
- * between 2 banks
- */
-	"mov %%ilink, %0\n\t"
-	"lr %0, [%1]\n\t"
-	"or %0, %0, %2\n\t"
-	"kflag %0\n\t"
-	"mov %%sp, %%ilink\n\t"
-/* switch back to bank0, use ilink to avoid the pollution of
- * bank1's gp regs.
- */
-	"lr %%ilink, [%1]\n\t"
-	"and %%ilink, %%ilink, %3\n\t"
-	"kflag %%ilink\n\t"
-	:
-	: "r"(firq_sp), "i"(_ARC_V2_STATUS32),
-	  "i"(_ARC_V2_STATUS32_RB(1)),
-	  "i"(~_ARC_V2_STATUS32_RB(7))
-	);
-	arch_irq_unlock(key);
-}
-#endif
 
 /*
  * @brief Enable an interrupt line
@@ -93,9 +35,12 @@ void z_arc_firq_stack_set(void)
  * @return N/A
  */
 
-void arch_irq_enable(unsigned int irq)
+void _arch_irq_enable(unsigned int irq)
 {
-	z_arc_v2_irq_unit_int_enable(irq);
+	int key = irq_lock();
+
+	_arc_v2_irq_unit_int_enable(irq);
+	irq_unlock(key);
 }
 
 /*
@@ -107,20 +52,12 @@ void arch_irq_enable(unsigned int irq)
  * @return N/A
  */
 
-void arch_irq_disable(unsigned int irq)
+void _arch_irq_disable(unsigned int irq)
 {
-	z_arc_v2_irq_unit_int_disable(irq);
-}
+	int key = irq_lock();
 
-/**
- * @brief Return IRQ enable state
- *
- * @param irq IRQ line
- * @return interrupt enable state, true or false
- */
-int arch_irq_is_enabled(unsigned int irq)
-{
-	return z_arc_v2_irq_unit_int_enabled(irq);
+	_arc_v2_irq_unit_int_disable(irq);
+	irq_unlock(key);
 }
 
 /*
@@ -137,23 +74,16 @@ int arch_irq_is_enabled(unsigned int irq)
  * @return N/A
  */
 
-void z_irq_priority_set(unsigned int irq, unsigned int prio, uint32_t flags)
+void _irq_priority_set(unsigned int irq, unsigned int prio, u32_t flags)
 {
 	ARG_UNUSED(flags);
 
+	int key = irq_lock();
+
 	__ASSERT(prio < CONFIG_NUM_IRQ_PRIO_LEVELS,
 		 "invalid priority %d for irq %d", prio, irq);
-/* 0 -> CONFIG_NUM_IRQ_PRIO_LEVELS allocted to secure world
- * left prio levels allocated to normal world
- */
-#if defined(CONFIG_ARC_SECURE_FIRMWARE)
-	prio = prio < ARC_N_IRQ_START_LEVEL ?
-		prio : (ARC_N_IRQ_START_LEVEL - 1);
-#elif defined(CONFIG_ARC_NORMAL_FIRMWARE)
-	prio = prio < ARC_N_IRQ_START_LEVEL ?
-		 ARC_N_IRQ_START_LEVEL : prio;
-#endif
-	z_arc_v2_irq_unit_prio_set(irq, prio);
+	_arc_v2_irq_unit_prio_set(irq, prio);
+	irq_unlock(key);
 }
 
 /*
@@ -165,19 +95,12 @@ void z_irq_priority_set(unsigned int irq, unsigned int prio, uint32_t flags)
  * @return N/A
  */
 
-void z_irq_spurious(const void *unused)
+#include <misc/printk.h>
+void _irq_spurious(void *unused)
 {
 	ARG_UNUSED(unused);
-	z_fatal_error(K_ERR_SPURIOUS_IRQ, NULL);
+	printk("_irq_spurious(). Spinning...\n");
+	for (;;)
+		;
 }
 
-#ifdef CONFIG_DYNAMIC_INTERRUPTS
-int arch_irq_connect_dynamic(unsigned int irq, unsigned int priority,
-			     void (*routine)(const void *parameter),
-			     const void *parameter, uint32_t flags)
-{
-	z_isr_install(irq, routine, parameter);
-	z_irq_priority_set(irq, priority, flags);
-	return irq;
-}
-#endif /* CONFIG_DYNAMIC_INTERRUPTS */

arch/arc/core/irq_offload.c

@@ -12,22 +12,24 @@
 #include <irq_offload.h>
 
 static irq_offload_routine_t offload_routine;
-static const void *offload_param;
+static void *offload_param;
 
 /* Called by trap_s exception handler */
-void z_irq_do_offload(void)
+void _irq_do_offload(void)
 {
 	offload_routine(offload_param);
 }
 
-void arch_irq_offload(irq_offload_routine_t routine, const void *parameter)
+void irq_offload(irq_offload_routine_t routine, void *parameter)
 {
+	int key;
 
+	key = irq_lock();
 	offload_routine = routine;
 	offload_param = parameter;
 
-	__asm__ volatile ("trap_s %[id]"
-		:
-		: [id] "i"(_TRAP_S_SCALL_IRQ_OFFLOAD) : );
+	__asm__ volatile ("trap_s 0");
 
+	irq_unlock(key);
 }
+

arch/arc/core/isr_wrapper.S

@@ -19,14 +19,32 @@
 #include <sw_isr_table.h>
 #include <kernel_structs.h>
 #include <arch/cpu.h>
-#include <swap_macros.h>
-#include <arch/arc/asm-compat/assembler.h>
 
 GTEXT(_isr_wrapper)
 GTEXT(_isr_demux)
 
-#if defined(CONFIG_PM)
-GTEXT(z_pm_save_idle_exit)
+GDATA(exc_nest_count)
+SECTION_VAR(BSS, exc_nest_count)
+	.balign 4
+	.word 0
+
+
+#if CONFIG_RGF_NUM_BANKS == 1
+GDATA(saved_r0)
+
+SECTION_VAR(BSS, saved_r0)
+	.balign 4
+	.word 0
+#else
+GDATA(saved_sp)
+
+SECTION_VAR(BSS, saved_sp)
+	.balign 4
+	.word 0
+#endif
+
+#if defined(CONFIG_SYS_POWER_MANAGEMENT)
+GTEXT(_sys_power_save_idle_exit)
 #endif
 
 /*
@@ -36,38 +54,47 @@ _rirq_enter/_firq_enter: they are jump points.
 The flow is the following:
 
 ISR -> _isr_wrapper -- + -> _rirq_enter -> _isr_demux -> ISR -> _rirq_exit
-			 |
-			 + -> _firq_enter -> _isr_demux -> ISR -> _firq_exit
+                       |
+                       + -> _firq_enter -> _isr_demux -> ISR -> _firq_exit
 
 Context switch explanation:
 
 The context switch code is spread in these files:
 
-	isr_wrapper.s, switch.s, swap_macros.h, fast_irq.s, regular_irq.s
+  isr_wrapper.s, swap.s, swap_macros.s, fast_irq.s, regular_irq.s
 
 IRQ stack frame layout:
 
-	high address
+  high address
 
-	status32
-		pc
-	lp_count
-	lp_start
-	lp_end
-	blink
-	 r13
-	 ...
-	sp ->    r0
+           status32
+              pc
+           lp_count
+           lp_start
+            lp_end
+            blink
+             r13
+             ...
+    sp ->    r0
 
-	low address
+  low address
+
+Registers not taken into account in the current implementation.
+          jli_base
+          ldi_base
+          ei_base
+          accl
+          acch
 
 The context switch code adopts this standard so that it is easier to follow:
 
-	- r2 contains _kernel.current ASAP, and the incoming thread when we
-		transition from outgoing thread to incoming thread
+  - r1 contains _kernel ASAP and is not overwritten over the lifespan of
+    the functions.
+  - r2 contains _kernel.current ASAP, and the incoming thread when we
+    transition from outgoing thread to incoming thread
 
 Not loading _kernel into r0 allows loading _kernel without stomping on
-the parameter in r0 in arch_switch().
+the parameter in r0 in _Swap().
 
 
 ARCv2 processors have two kinds of interrupts: fast (FIRQ) and regular. The
@@ -93,55 +120,53 @@ registers (to avoid stack accesses). It is possible to register a FIRQ
 handler that operates outside of the kernel, but care must be taken to only
 use instructions that only use the banked registers.
 
-The kernel is able to handle transitions to and from FIRQ, RIRQ and threads.
-The contexts are saved 'lazily': the minimum amount of work is
+The kernel is able to handle transitions to and from FIRQ, RIRQ and threads
+(fibers/task). The contexts are saved 'lazily': the minimum amount of work is
 done upfront, and the rest is done when needed:
 
 o RIRQ
 
-	All needed registers to run C code in the ISR are saved automatically
-	on the outgoing thread's stack: loop, status32, pc, and the caller-
-	saved GPRs. That stack frame layout is pre-determined. If returning
-	to a thread, the stack is popped and no registers have to be saved by
-	the kernel. If a context switch is required, the callee-saved GPRs
-	are then saved in the thread's stack.
+  All needed regisers to run C code in the ISR are saved automatically
+  on the outgoing thread's stack: loop, status32, pc, and the caller-
+  saved GPRs. That stack frame layout is pre-determined. If returning
+  to a fiber, the stack is popped and no registers have to be saved by
+  the kernel. If a context switch is required, the callee-saved GPRs
+  are then saved in the thread control structure (TCS).
 
 o FIRQ
 
-	First, a FIRQ can be interrupting a lower-priority RIRQ: if this is
-	the case, the FIRQ does not take a scheduling decision and leaves it
-	the RIRQ to handle. This limits the amount of code that has to run at
-	interrupt-level.
+  First, a FIRQ can be interrupting a lower-priority RIRQ: if this is the case,
+  the FIRQ does not take a scheduling decision and leaves it the RIRQ to
+  handle. This limits the amount of code that has to run at interrupt-level.
 
-	CONFIG_RGF_NUM_BANKS==1 case:
-	Registers are saved on the stack frame just as they are for RIRQ.
-	Context switch can happen just as it does in the RIRQ case, however,
-	if the FIRQ interrupted a RIRQ, the FIRQ will return from interrupt
-	and let the RIRQ do the context switch. At entry, one register is
-	needed in order to have code to save other registers. r0 is saved
-	first in the stack and restored later
+  CONFIG_RGF_NUM_BANKS==1 case:
+  Registers are saved on the stack frame just as they are for RIRQ.
+  Context switch can happen just as it does in the RIRQ case, however,
+  if the FIRQ interrupted a RIRQ, the FIRQ will return from interrupt and
+  let the RIRQ do the context switch.  At entry, one register is needed in order
+  to have code to save other registers. r0 is saved first in a global called
+  saved_r0.
 
-	CONFIG_RGF_NUM_BANKS!=1 case:
-	During early initialization, the sp in the 2nd register bank is made to
-	refer to _firq_stack. This allows for the FIRQ handler to use its own
-	stack. GPRs are banked, loop registers are saved in unused callee saved
-	regs upon interrupt entry. If returning to a thread, loop registers are
-	restored and the CPU switches back to bank 0 for the GPRs. If a context
-	switch is needed, at this point only are all the registers saved.
-	First, a  stack frame with the same layout as the automatic RIRQ one is
-	created and then the callee-saved GPRs are saved in the stack.
-	status32_p0 and ilink are saved in this case, not status32 and pc.
-	To create the stack frame, the FIRQ handling code must first go back to
-	using bank0 of registers, since that is where the registers containing
-	the exiting thread are saved. Care must be taken not to touch any
-	register before saving them: the only one usable at that point is the
-	stack pointer.
+  CONFIG_RGF_NUM_BANKS!=1 case:
+  During early initialization, the sp in the 2nd register bank is made to
+  refer to _firq_stack. This allows for the FIRQ handler to use its own stack.
+  GPRs are banked, loop registers are saved in unused callee saved regs upon
+  interrupt entry. If returning to a fiber, loop registers are restored and the
+  CPU switches back to bank 0 for the GPRs. If a context switch is
+  needed, at this point only are all the registers saved. First, a
+  stack frame with the same layout as the automatic RIRQ one is created
+  and then the callee-saved GPRs are saved in the TCS. status32_p0 and
+  ilink are saved in this case, not status32 and pc.
+  To create the stack frame, the FIRQ handling code must first go back to using
+  bank0 of registers, since that is where the registers containing the exiting
+  thread are saved. Care must be taken not to touch any register before saving
+  them: the only one usable at that point is the stack pointer.
 
 o coop
 
-	When a coop context switch is done, the callee-saved registers are
-	saved in the stack. The other GPRs do not need to be saved, since the
-	compiler has already placed them on the stack.
+  When a coop context switch is done, the callee-saved registers are
+  saved in the TCS. The other GPRs do not need to be saved, since the
+  compiler has already placed them on the stack.
 
 For restoring the contexts, there are six cases. In all cases, the
 callee-saved registers of the incoming thread have to be restored. Then, there
@@ -149,87 +174,110 @@ are specifics for each case:
 
 From coop:
 
-	o to coop
+  o to coop
 
-		Do a normal function call return.
+    Restore interrupt lock level and do a normal function call return.
 
-	o to any irq
+  o to any irq
 
-	The incoming interrupted thread has an IRQ stack frame containing the
-	caller-saved registers that has to be popped. status32 has to be
-	restored, then we jump to the interrupted instruction.
+    The incoming interrupted thread has an IRQ stack frame containing the
+    caller-saved registers that has to be popped. status32 has to be restored,
+    then we jump to the interrupted instruction.
 
 From FIRQ:
 
-	When CONFIG_RGF_NUM_BANKS==1, context switch is done as it is for RIRQ.
-	When CONFIG_RGF_NUM_BANKS!=1, the processor is put back to using bank0,
-	not bank1 anymore, because it had to save the outgoing context from
-	bank0, and now has to load the incoming one into bank0.
+  When CONFIG_RGF_NUM_BANKS==1, context switch is done as it is for RIRQ.
+  When CONFIG_RGF_NUM_BANKS!=1, the processor is put back to using bank0,
+  not bank1 anymore, because it had to save the outgoing context from bank0,
+  and now has to load the incoming one
+  into bank0.
 
-	o to coop
+  o to coop
 
-	The address of the returning instruction from arch_switch() is loaded
-	in ilink and the saved status32 in status32_p0.
+    The address of the returning instruction from _Swap() is loaded in ilink and
+    the saved status32 in status32_p0, taking care to adjust the interrupt lock
+    state desired in status32_p0. The return value is put in r0.
 
-	o to any irq
+  o to any irq
 
-	The IRQ has saved the caller-saved registers in a stack frame, which
-	must be popped, and status32 and pc loaded in status32_p0 and ilink.
+    The IRQ has saved the caller-saved registers in a stack frame, which must be
+    popped, and statu32 and pc loaded in status32_p0 and ilink.
 
 From RIRQ:
 
-	o to coop
+  o to coop
 
-	The interrupt return mechanism in the processor expects a stack frame,
-	but the outgoing context did not create one. A fake one is created
-	here, with only the relevant values filled in: pc, status32.
+    The interrupt return mechanism in the processor expects a stack frame, but
+    the outgoing context did not create one. A fake one is created here, with
+    only the relevant values filled in: pc, status32 and the return value in r0.
 
-	There is a discrepancy between the ABI from the ARCv2 docs,
-	including the way the processor pushes GPRs in pairs in the IRQ stack
-	frame, and the ABI GCC uses. r13 should be a callee-saved register,
-	but GCC treats it as caller-saved. This means that the processor pushes
-	it in the stack frame along with r12, but the compiler does not save it
-	before entering a function. So, it is saved as part of the callee-saved
-	registers, and restored there, but the processor restores it _a second
-	time_ when popping the IRQ stack frame. Thus, the correct value must
-	also be put in the fake stack frame when returning to a thread that
-	context switched out cooperatively.
+    There is a discrepancy between the ABI from the ARCv2 docs, including the
+    way the processor pushes GPRs in pairs in the IRQ stack frame, and the ABI
+    GCC uses. r13 should be a callee-saved register, but GCC treats it as
+    caller-saved. This means that the processor pushes it in the stack frame
+    along with r12, but the compiler does not save it before entering a
+    function. So, it is saved as part of the callee-saved registers, and
+    restored there, but the processor restores it _a second time_ when popping
+    the IRQ stack frame. Thus, the correct value must also be put in the fake
+    stack frame when returning to a thread that context switched out
+    cooperatively.
 
-	o to any irq
+  o to any irq
 
-	Both types of IRQs already have an IRQ stack frame: simply return from
-	interrupt.
+    Both types of IRQs already have an IRQ stack frame: simply return from
+    interrupt.
  */
 
 SECTION_FUNC(TEXT, _isr_wrapper)
-#ifdef CONFIG_ARC_FIRQ
 #if CONFIG_RGF_NUM_BANKS == 1
-/* free r0 here, use r0 to check whether irq is firq.
- * for rirq,  as sp will not change and r0 already saved, this action
- * in fact is useless
- * for firq,  r0 will be restored later
- */
-	push r0
+	st r0,[saved_r0]
 #endif
 	lr r0, [_ARC_V2_AUX_IRQ_ACT]
 	ffs r0, r0
 	cmp r0, 0
 #if CONFIG_RGF_NUM_BANKS == 1
 	bnz rirq_path
-	pop r0
 	/* 1-register bank FIRQ handling must save registers on stack */
-	_create_irq_stack_frame
-	lr r0, [_ARC_V2_STATUS32_P0]
-	st_s r0, [sp, ___isf_t_status32_OFFSET]
-	st ilink, [sp, ___isf_t_pc_OFFSET]
-
-	mov_s r3, _firq_exit
-	mov_s r2, _firq_enter
+	lr r0,[_ARC_V2_STATUS32_P0]
+	push_s r0
+	mov r0,ilink
+	push_s r0
+#ifdef CONFIG_CODE_DENSITY
+	lr r0, [_ARC_V2_JLI_BASE]
+	push_s r0
+	lr r0, [_ARC_V2_LDI_BASE]
+	push_s r0
+	lr r0, [_ARC_V2_EI_BASE]
+	push_s r0
+#endif
+	mov r0,lp_count
+	push_s r0
+	lr r0, [_ARC_V2_LP_START]
+	push_s r0
+	lr r0, [_ARC_V2_LP_END]
+	push_s r0
+	push_s blink
+	push_s r13
+	push_s r12
+	push r11
+	push r10
+	push r9
+	push r8
+	push r7
+	push r6
+	push r5
+	push r4
+	push_s r3
+	push_s r2
+	push_s r1
+	ld r0,[saved_r0]
+	push_s r0
+	mov r3, _firq_exit
+	mov r2, _firq_enter
 	j_s [r2]
 rirq_path:
-	add sp, sp, 4
-	mov_s r3, _rirq_exit
-	mov_s r2, _rirq_enter
+	mov r3, _rirq_exit
+	mov r2, _rirq_enter
 	j_s [r2]
 #else
 	mov.z r3, _firq_exit
@@ -238,84 +286,89 @@ rirq_path:
 	mov.nz r2, _rirq_enter
 	j_s [r2]
 #endif
+
+#ifdef CONFIG_KERNEL_EVENT_LOGGER_SLEEP
+GTEXT(_sys_k_event_logger_exit_sleep)
+
+.macro log_sleep_k_event
+	clri r0 /* do not interrupt event logger operations */
+	push_s r0
+	push_s blink
+	jl _sys_k_event_logger_exit_sleep
+	pop_s blink
+	pop_s r0
+	seti r0
+.endm
 #else
-	MOVR r3, _rirq_exit
-	MOVR r2, _rirq_enter
-	j_s [r2]
+	#define log_sleep_k_event
+#endif
+#if defined(CONFIG_KERNEL_EVENT_LOGGER_INTERRUPT)
+GTEXT(_sys_k_event_logger_interrupt)
+
+.macro log_interrupt_k_event
+	clri r0 /* do not interrupt event logger operations */
+	push_s r0
+	push_s blink
+	jl _sys_k_event_logger_interrupt
+	pop_s blink
+	pop_s r0
+	seti r0
+.endm
+#else
+	#define log_interrupt_k_event
 #endif
 
-/* r0, r1, and r3 will be used in exit_tickless_idle macro */
+#if defined(CONFIG_SYS_POWER_MANAGEMENT)
 .macro exit_tickless_idle
-#if defined(CONFIG_PM)
 	clri r0 /* do not interrupt exiting tickless idle operations */
-	MOVR r1, _kernel
-	/* z_kernel.idle is 32 bit despite of platform bittnes */
-	ld_s r3, [r1, _kernel_offset_to_idle] /* requested idle duration */
-	breq r3, 0, _skip_pm_save_idle_exit
+	push_s r1
+	push_s r0
+	mov_s r1, _kernel
+	ld_s r0, [r1, _kernel_offset_to_idle] /* requested idle duration */
+	breq r0, 0, _skip_sys_power_save_idle_exit
 
 	st 0, [r1, _kernel_offset_to_idle] /* zero idle duration */
-	PUSHR blink
-	jl z_pm_save_idle_exit
-	POPR blink
+	push_s blink
+	jl _sys_power_save_idle_exit
+	pop_s blink
 
-_skip_pm_save_idle_exit:
+_skip_sys_power_save_idle_exit:
+	pop_s r0
+	pop_s r1
 	seti r0
-#endif
 .endm
+#else
+	#define exit_tickless_idle
+#endif
 
 /* when getting here, r3 contains the interrupt exit stub to call */
 SECTION_FUNC(TEXT, _isr_demux)
-	PUSHR r3
+	push_s r3
 
-/* according to ARCv2 ISA, r25, r30, r58, r59 are caller-saved
- * scratch registers, possibly used by interrupt handlers
- */
-	PUSHR r25
-	PUSHR r30
-#ifdef CONFIG_ARC_HAS_ACCL_REGS
-	PUSHR r58
-	PUSHR r59
-#endif
 
-#ifdef CONFIG_TRACING_ISR
-	bl sys_trace_isr_enter
-#endif
 	/* cannot be done before this point because we must be able to run C */
+	/* r0 is available to be stomped here, and exit_tickless_idle uses it */
 	exit_tickless_idle
+	log_interrupt_k_event
+	log_sleep_k_event
 
 	lr r0, [_ARC_V2_ICAUSE]
 	/* handle software triggered interrupt */
-	lr r3, [_ARC_V2_AUX_IRQ_HINT]
-	brne r3, r0, irq_hint_handled
-	sr 0, [_ARC_V2_AUX_IRQ_HINT]
+	lr	r3, [_ARC_V2_AUX_IRQ_HINT]
+	brne	r3, r0, irq_hint_handled
+	sr	0, [_ARC_V2_AUX_IRQ_HINT]
 irq_hint_handled:
 
 	sub r0, r0, 16
 
-	MOVR r1, _sw_isr_table
-	/* SW ISR table entries are 8-bytes wide for 32bit ISA and
-	 * 16-bytes wide for 64bit ISA */
-	ASLR r0, r0, (ARC_REGSHIFT + 1)
-	ADDR r0, r1, r0
-	/* ISR into r1 */
-	LDR r1, r0, ARC_REGSZ
+	mov r1, _sw_isr_table
+	add3 r0, r1, r0   /* table entries are 8-bytes wide */
+
+	ld_s r1, [r0, 4] /* ISR into r1 */
 	jl_s.d [r1]
-	/* delay slot: ISR parameter into r0 */
-	LDR r0, r0
-
-#ifdef CONFIG_TRACING_ISR
-	bl sys_trace_isr_exit
-#endif
-
-#ifdef CONFIG_ARC_HAS_ACCL_REGS
-	POPR r59
-	POPR r58
-#endif
-
-	POPR r30
-	POPR r25
+	ld_s r0, [r0] /* delay slot: ISR parameter into r0  */
 
 	/* back from ISR, jump to exit stub */
-	POPR r3
+	pop_s r3
 	j_s [r3]
-	nop_s
+	nop

arch/arc/core/mpu/CMakeLists.txt

@@ -1,6 +0,0 @@
-# SPDX-License-Identifier: Apache-2.0
-
-zephyr_library()
-
-zephyr_library_sources_ifdef(CONFIG_ARC_CORE_MPU arc_core_mpu.c)
-zephyr_library_sources_ifdef(CONFIG_ARC_MPU arc_mpu.c)

arch/arc/core/mpu/Kconfig

@@ -1,38 +1,39 @@
-# Memory Protection Unit (MPU) configuration options
+# Kconfig - Memory Protection Unit (MPU) configuration options
 
+#
 # Copyright (c) 2017 Synopsys
+#
 # SPDX-License-Identifier: Apache-2.0
-
+#
 config ARC_MPU_VER
-	int "ARC MPU version"
+	int
+	prompt "ARC MPU version"
 	range 2 4
 	default 2
 	help
-	  ARC MPU has several versions. For MPU v2, the minimum region is 2048 bytes;
-	  For MPU v3 and v4, the minimum region is 32 bytes
+	ARC MPU has several versions. For MPU v2, the minimum region is 2048 bytes;
+	For MPU v3, the minimum region is 32 bytes
 
 config ARC_CORE_MPU
 	bool "ARC Core MPU functionalities"
+	depends on CPU_HAS_MPU
+	default n
 	help
 	  ARC core MPU functionalities
 
 config MPU_STACK_GUARD
 	bool "Thread Stack Guards"
-	depends on ARC_CORE_MPU && ARC_MPU_VER !=2
+	depends on ARC_CORE_MPU && !ARC_STACK_CHECKING
+	select THREAD_STACK_INFO
+	default n
 	help
 	  Enable thread stack guards via MPU. ARC supports built-in stack protection.
-	  If your core supports that, it is preferred over MPU stack guard.
-	  For ARC_MPU_VER == 2, it requires 2048 extra bytes and a strong start address
-	  alignment, this will bring big waste of memory, so no support for it.
+	  If your core supports that, it is preferred over MPU stack guard
 
 config ARC_MPU
 	bool "ARC MPU Support"
-	select MPU
-	select SRAM_REGION_PERMISSIONS
+	depends on CPU_HAS_MPU
 	select ARC_CORE_MPU
-	select THREAD_STACK_INFO
-	select GEN_PRIV_STACKS if ARC_MPU_VER = 2
-	select MPU_REQUIRES_POWER_OF_TWO_ALIGNMENT if ARC_MPU_VER = 2
-	select MPU_REQUIRES_NON_OVERLAPPING_REGIONS if ARC_MPU_VER = 4
+	default n
 	help
-	  Target has ARC MPU (currently only works for EMSK 2.2/2.3 ARCEM7D)
+	  Target has ARC MPU (currently only works for EMSK 2.2 ARCEM7D)

arch/arc/core/mpu/Makefile

@@ -0,0 +1,2 @@
+obj-$(CONFIG_ARC_CORE_MPU) += arc_core_mpu.o
+obj-$(CONFIG_ARC_MPU) += arc_mpu.o

arch/arc/core/mpu/arc_core_mpu.c

@@ -9,35 +9,22 @@
 #include <kernel.h>
 #include <soc.h>
 #include <arch/arc/v2/mpu/arc_core_mpu.h>
-#include <kernel_structs.h>
 
+#if defined(CONFIG_MPU_STACK_GUARD)
 /*
- * @brief Configure MPU for the thread
+ * @brief Configure MPU stack guard
  *
- * This function configures per thread memory map reprogramming the MPU.
+ * This function configures per thread stack guards reprogramming the MPU.
+ * The functionality is meant to be used during context switch.
  *
  * @param thread thread info data structure.
  */
-void configure_mpu_thread(struct k_thread *thread)
+void configure_mpu_stack_guard(struct k_thread *thread)
 {
 	arc_core_mpu_disable();
-	arc_core_mpu_configure_thread(thread);
+	arc_core_mpu_configure(THREAD_STACK_GUARD_REGION,
+			       thread->stack_info.start - STACK_GUARD_SIZE,
+			       thread->stack_info.size);
 	arc_core_mpu_enable();
 }
-
-#if defined(CONFIG_USERSPACE)
-
-int arch_mem_domain_max_partitions_get(void)
-{
-	return arc_core_mpu_get_max_domain_partition_regions();
-}
-
-/*
- * Validate the given buffer is user accessible or not
- */
-int arch_buffer_validate(void *addr, size_t size, int write)
-{
-	return arc_core_mpu_buffer_validate(addr, size, write);
-}
-
 #endif

arch/arc/core/mpu/arc_mpu.c

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2019 Synopsys.
+ * Copyright (c) 2017 Synopsys.
  *
  * SPDX-License-Identifier: Apache-2.0
  */
@@ -11,49 +11,232 @@
 #include <arch/arc/v2/aux_regs.h>
 #include <arch/arc/v2/mpu/arc_mpu.h>
 #include <arch/arc/v2/mpu/arc_core_mpu.h>
-#include <linker/linker-defs.h>
+#include <logging/sys_log.h>
 
-#define LOG_LEVEL CONFIG_MPU_LOG_LEVEL
-#include <logging/log.h>
-LOG_MODULE_REGISTER(mpu);
+
+#define AUX_MPU_RDB_VALID_MASK (0x1)
+#define AUX_MPU_EN_ENABLE   (0x40000000)
+#define AUX_MPU_EN_DISABLE  (0xBFFFFFFF)
+
+#define AUX_MPU_RDP_REGION_SIZE(bits)  \
+			(((bits - 1) & 0x3) | (((bits - 1) & 0x1C) << 7))
+#define AUX_MPU_RDP_ATTR_MASK (0xFFF)
+
+#define _ARC_V2_MPU_EN   (0x409)
+#define _ARC_V2_MPU_RDB0 (0x422)
+#define _ARC_V2_MPU_RDP0 (0x423)
+
+/* For MPU version 2, the minimum protection region size is 2048 bytes */
+/* FOr MPU version 3, the minimum protection region size is 32 bytes */
+#if CONFIG_ARC_MPU_VER == 2
+#define ARC_FEATURE_MPU_ALIGNMENT_BITS 11
+#elif CONFIG_ARC_MPU_VER == 3
+#define ARC_FEATURE_MPU_ALIGNMENT_BITS 5
+#endif
 
 /**
- * @brief Get the number of supported MPU regions
+ * @brief Get the number of supported mpu regions
  *
  */
-static inline uint8_t get_num_regions(void)
+static inline u8_t _get_num_regions(void)
 {
-	uint32_t num = z_arc_v2_aux_reg_read(_ARC_V2_MPU_BUILD);
+	u32_t num = _arc_v2_aux_reg_read(_ARC_V2_MPU_BUILD);
 
-	num = (num & 0xFF00U) >> 8U;
+	num = (num & 0xFF00) >> 8;
 
-	return (uint8_t)num;
+	return (u8_t)num;
 }
 
+
 /**
  * This internal function is utilized by the MPU driver to parse the intent
  * type (i.e. THREAD_STACK_REGION) and return the correct parameter set.
  */
-static inline uint32_t get_region_attr_by_type(uint32_t type)
+static inline u32_t _get_region_attr_by_type(u32_t type, u32_t size)
 {
 	switch (type) {
-	case THREAD_STACK_USER_REGION:
-		return REGION_RAM_ATTR;
 	case THREAD_STACK_REGION:
-		return AUX_MPU_ATTR_KW | AUX_MPU_ATTR_KR;
-	case THREAD_APP_DATA_REGION:
-		return REGION_RAM_ATTR;
+		return 0;
 	case THREAD_STACK_GUARD_REGION:
-		/* no Write and Execute to guard region */
-		return AUX_MPU_ATTR_UR | AUX_MPU_ATTR_KR;
+	/* no Read, Write and Execute to guard region */
+		return  AUX_MPU_RDP_REGION_SIZE(
+			ARC_FEATURE_MPU_ALIGNMENT_BITS);
 	default:
-		/* unknown type */
+		/* Size 0 region */
 		return 0;
 	}
 }
 
-#if CONFIG_ARC_MPU_VER == 2
-#include "arc_mpu_v2_internal.h"
-#elif CONFIG_ARC_MPU_VER == 4
-#include "arc_mpu_v4_internal.h"
-#endif
+static inline void _region_init(u32_t index, u32_t region_addr,
+			 u32_t region_attr)
+{
+
+	index = 2 * index;
+
+	_arc_v2_aux_reg_write(_ARC_V2_MPU_RDP0 + index, region_attr);
+	_arc_v2_aux_reg_write(_ARC_V2_MPU_RDB0 + index, region_addr);
+}
+
+
+/* ARC Core MPU Driver API Implementation for ARC MPU */
+
+/**
+ * @brief enable the MPU
+ */
+void arc_core_mpu_enable(void)
+{
+	/* Enable MPU */
+	_arc_v2_aux_reg_write(_ARC_V2_MPU_EN,
+		_arc_v2_aux_reg_read(_ARC_V2_MPU_EN) | AUX_MPU_EN_ENABLE);
+}
+
+/**
+ * @brief disable the MPU
+ */
+void arc_core_mpu_disable(void)
+{
+	/* Disable MPU */
+	_arc_v2_aux_reg_write(_ARC_V2_MPU_EN,
+		_arc_v2_aux_reg_read(_ARC_V2_MPU_EN) & AUX_MPU_EN_DISABLE);
+}
+
+
+/**
+ * @brief configure the base address and size for an MPU region
+ *
+ * @param   type    MPU region type
+ * @param   base    base address in RAM
+ * @param   size    size of the region
+ */
+void arc_core_mpu_configure(u8_t type, u32_t base, u32_t size)
+{
+	u32_t region_index;
+	u32_t region_attr;
+
+	SYS_LOG_DBG("Region info: 0x%x 0x%x", base, size);
+	/*
+	 * The new MPU regions are allocated per type before
+	 * the statically configured regions.
+	 *
+	 * For ARC MPU v2, MPU regions can be overlapped, smaller
+	 * region index has higher priority.
+	 */
+
+	region_index = _get_num_regions() - mpu_config.num_regions;
+
+	if (type > region_index) {
+		return;
+	}
+
+	region_index -= type;
+	region_attr = _get_region_attr_by_type(type, size);
+
+	if (region_attr == 0) {
+		return;
+	}
+
+	base |= AUX_MPU_RDB_VALID_MASK;
+
+	_region_init(region_index, base, region_attr);
+}
+
+/**
+ * @brief configure the default region
+ *
+ * @param   region_attr region attribute of default region
+ */
+void arc_core_mpu_default(u32_t region_attr)
+{
+	u32_t val =  _arc_v2_aux_reg_read(_ARC_V2_MPU_EN) &
+			(~AUX_MPU_RDP_ATTR_MASK);
+
+	region_attr &= AUX_MPU_RDP_ATTR_MASK;
+
+	_arc_v2_aux_reg_write(_ARC_V2_MPU_EN, region_attr | val);
+}
+
+
+/**
+ * @brief configure the mpu region
+ *
+ * @param   index   MPU region index
+ * @param   base    base address
+ * @param   region_attr region attribute
+ */
+void arc_core_mpu_region(u32_t index, u32_t base, u32_t region_attr)
+{
+	if (index >= _get_num_regions()) {
+		return;
+	}
+
+	base |= AUX_MPU_RDB_VALID_MASK;
+	region_attr &= AUX_MPU_RDP_ATTR_MASK;
+
+	_region_init(index, base, region_attr);
+}
+
+/* ARC MPU Driver Initial Setup */
+
+/*
+ * @brief MPU default configuration
+ *
+ * This function provides the default configuration mechanism for the Memory
+ * Protection Unit (MPU).
+ */
+static void _arc_mpu_config(void)
+{
+	u32_t r_index;
+	u32_t num_regions;
+	u32_t i;
+
+	num_regions = _get_num_regions();
+
+	/* ARC MPU supports up to 16 Regions */
+	if (mpu_config.num_regions > num_regions) {
+		return;
+	}
+
+	/*
+	 * the MPU regions are filled in the reverse order.
+	 * According to ARCv2 ISA, the mpu region with smaller
+	 * index has higher priority. The static background mpu
+	 * regions in mpu_config will be in the bottom. Then
+	 * the special type regions will be above.
+	 *
+	 */
+	r_index = num_regions - mpu_config.num_regions;
+	/* Disable MPU */
+	arc_core_mpu_disable();
+
+	/* clear the regions reserved for special type */
+	for (i = 0; i < r_index; i++) {
+		_region_init(i, 0, 0);
+	}
+
+	/* configure the static regions */
+	for (r_index = 0; i < num_regions; i++) {
+		_region_init(i,
+			mpu_config.mpu_regions[r_index].base
+			| AUX_MPU_RDB_VALID_MASK,
+			mpu_config.mpu_regions[r_index].attr);
+		r_index++;
+	}
+
+	/* default region: no read, write and execute */
+	arc_core_mpu_default(0);
+
+	/* Enable MPU */
+	arc_core_mpu_enable();
+}
+
+static int arc_mpu_init(struct device *arg)
+{
+	ARG_UNUSED(arg);
+
+	_arc_mpu_config();
+
+	return 0;
+}
+
+SYS_INIT(arc_mpu_init, PRE_KERNEL_1,
+	 CONFIG_KERNEL_INIT_PRIORITY_DEFAULT);

arch/arc/core/mpu/arc_mpu_v2_internal.h

@@ -1,430 +0,0 @@
-/*
- * Copyright (c) 2019 Synopsys.
- *
- * SPDX-License-Identifier: Apache-2.0
- */
-#ifndef ZEPHYR_ARCH_ARC_CORE_MPU_ARC_MPU_V2_INTERNAL_H_
-#define ZEPHYR_ARCH_ARC_CORE_MPU_ARC_MPU_V2_INTERNAL_H_
-
-#define AUX_MPU_RDB_VALID_MASK (0x1)
-#define AUX_MPU_EN_ENABLE   (0x40000000)
-#define AUX_MPU_EN_DISABLE  (0xBFFFFFFF)
-
-#define AUX_MPU_RDP_REGION_SIZE(bits) \
-	(((bits - 1) & 0x3) | (((bits - 1) & 0x1C) << 7))
-
-#define AUX_MPU_RDP_ATTR_MASK (0x1FC)
-#define AUX_MPU_RDP_SIZE_MASK (0xE03)
-
-/* For MPU version 2, the minimum protection region size is 2048 bytes */
-#define ARC_FEATURE_MPU_ALIGNMENT_BITS 11
-
-/**
- * This internal function initializes a MPU region
- */
-static inline void _region_init(uint32_t index, uint32_t region_addr, uint32_t size,
-				uint32_t region_attr)
-{
-	index = index * 2U;
-
-	if (size > 0) {
-		uint8_t bits = find_msb_set(size) - 1;
-
-		if (bits < ARC_FEATURE_MPU_ALIGNMENT_BITS) {
-			bits = ARC_FEATURE_MPU_ALIGNMENT_BITS;
-		}
-
-		if ((1 << bits) < size) {
-			bits++;
-		}
-
-		region_attr &= ~(AUX_MPU_RDP_SIZE_MASK);
-		region_attr |= AUX_MPU_RDP_REGION_SIZE(bits);
-		region_addr |= AUX_MPU_RDB_VALID_MASK;
-	} else {
-		region_addr = 0U;
-	}
-
-	z_arc_v2_aux_reg_write(_ARC_V2_MPU_RDP0 + index, region_attr);
-	z_arc_v2_aux_reg_write(_ARC_V2_MPU_RDB0 + index, region_addr);
-}
-
-/**
- * This internal function is utilized by the MPU driver to parse the intent
- * type (i.e. THREAD_STACK_REGION) and return the correct region index.
- */
-static inline int get_region_index_by_type(uint32_t type)
-{
-	/*
-	 * The new MPU regions are allocated per type after the statically
-	 * configured regions. The type is one-indexed rather than
-	 * zero-indexed.
-	 *
-	 * For ARC MPU v2, the smaller index has higher priority, so the
-	 * index is allocated in reverse order. Static regions start from
-	 * the biggest index, then thread related regions.
-	 *
-	 */
-	switch (type) {
-	case THREAD_STACK_USER_REGION:
-		return get_num_regions() - mpu_config.num_regions
-		       - THREAD_STACK_REGION;
-	case THREAD_STACK_REGION:
-	case THREAD_APP_DATA_REGION:
-	case THREAD_DOMAIN_PARTITION_REGION:
-		/*
-		 * Start domain partition region from stack guard region
-		 * since stack guard is not supported.
-		 */
-		return get_num_regions() - mpu_config.num_regions - type + 1;
-	default:
-		__ASSERT(0, "Unsupported type");
-		return -EINVAL;
-	}
-}
-
-/**
- * This internal function checks if region is enabled or not
- */
-static inline bool _is_enabled_region(uint32_t r_index)
-{
-	return ((z_arc_v2_aux_reg_read(_ARC_V2_MPU_RDB0 + r_index * 2U)
-		 & AUX_MPU_RDB_VALID_MASK) == AUX_MPU_RDB_VALID_MASK);
-}
-
-/**
- * This internal function check if the given buffer in in the region
- */
-static inline bool _is_in_region(uint32_t r_index, uint32_t start, uint32_t size)
-{
-	uint32_t r_addr_start;
-	uint32_t r_addr_end;
-	uint32_t r_size_lshift;
-
-	r_addr_start = z_arc_v2_aux_reg_read(_ARC_V2_MPU_RDB0 + r_index * 2U)
-		       & (~AUX_MPU_RDB_VALID_MASK);
-	r_size_lshift = z_arc_v2_aux_reg_read(_ARC_V2_MPU_RDP0 + r_index * 2U)
-			& AUX_MPU_RDP_SIZE_MASK;
-	r_size_lshift = (r_size_lshift & 0x3) | ((r_size_lshift >> 7) & 0x1C);
-	r_addr_end = r_addr_start  + (1 << (r_size_lshift + 1));
-
-	if (start >= r_addr_start && (start + size) <= r_addr_end) {
-		return 1;
-	}
-
-	return 0;
-}
-
-/**
- * This internal function check if the region is user accessible or not
- */
-static inline bool _is_user_accessible_region(uint32_t r_index, int write)
-{
-	uint32_t r_ap;
-
-	r_ap = z_arc_v2_aux_reg_read(_ARC_V2_MPU_RDP0 + r_index * 2U);
-
-	r_ap &= AUX_MPU_RDP_ATTR_MASK;
-
-	if (write) {
-		return ((r_ap & (AUX_MPU_ATTR_UW | AUX_MPU_ATTR_KW)) ==
-			(AUX_MPU_ATTR_UW | AUX_MPU_ATTR_KW));
-	}
-
-	return ((r_ap & (AUX_MPU_ATTR_UR | AUX_MPU_ATTR_KR)) ==
-		(AUX_MPU_ATTR_UR | AUX_MPU_ATTR_KR));
-}
-
-/**
- * @brief configure the base address and size for an MPU region
- *
- * @param type MPU region type
- * @param base base address in RAM
- * @param size size of the region
- */
-static inline int _mpu_configure(uint8_t type, uint32_t base, uint32_t size)
-{
-	int32_t region_index =  get_region_index_by_type(type);
-	uint32_t region_attr = get_region_attr_by_type(type);
-
-	LOG_DBG("Region info: 0x%x 0x%x", base, size);
-
-	if (region_attr == 0U || region_index < 0) {
-		return -EINVAL;
-	}
-
-	/*
-	 * For ARC MPU v2, MPU regions can be overlapped, smaller
-	 * region index has higher priority.
-	 */
-	_region_init(region_index, base, size, region_attr);
-
-	return 0;
-}
-
-/* ARC Core MPU Driver API Implementation for ARC MPUv2 */
-
-/**
- * @brief enable the MPU
- */
-void arc_core_mpu_enable(void)
-{
-	/* Enable MPU */
-	z_arc_v2_aux_reg_write(_ARC_V2_MPU_EN,
-		z_arc_v2_aux_reg_read(_ARC_V2_MPU_EN) | AUX_MPU_EN_ENABLE);
-}
-
-/**
- * @brief disable the MPU
- */
-void arc_core_mpu_disable(void)
-{
-	/* Disable MPU */
-	z_arc_v2_aux_reg_write(_ARC_V2_MPU_EN,
-		z_arc_v2_aux_reg_read(_ARC_V2_MPU_EN) & AUX_MPU_EN_DISABLE);
-}
-
-/**
- * @brief configure the thread's MPU regions
- *
- * @param thread the target thread
- */
-void arc_core_mpu_configure_thread(struct k_thread *thread)
-{
-#if defined(CONFIG_USERSPACE)
-	/* configure stack region of user thread */
-	if (thread->base.user_options & K_USER) {
-		LOG_DBG("configure user thread %p's stack", thread);
-		if (_mpu_configure(THREAD_STACK_USER_REGION,
-				   (uint32_t)thread->stack_info.start,
-				   thread->stack_info.size) < 0) {
-			LOG_ERR("user thread %p's stack failed", thread);
-			return;
-		}
-	}
-
-	LOG_DBG("configure thread %p's domain", thread);
-	arc_core_mpu_configure_mem_domain(thread);
-#endif
-}
-
-
-/**
- * @brief configure the default region
- *
- * @param region_attr region attribute of default region
- */
-void arc_core_mpu_default(uint32_t region_attr)
-{
-	uint32_t val =  z_arc_v2_aux_reg_read(_ARC_V2_MPU_EN) &
-		    (~AUX_MPU_RDP_ATTR_MASK);
-
-	region_attr &= AUX_MPU_RDP_ATTR_MASK;
-
-	z_arc_v2_aux_reg_write(_ARC_V2_MPU_EN, region_attr | val);
-}
-
-/**
- * @brief configure the MPU region
- *
- * @param index   MPU region index
- * @param base    base address
- * @param region_attr region attribute
- */
-int arc_core_mpu_region(uint32_t index, uint32_t base, uint32_t size,
-			 uint32_t region_attr)
-{
-	if (index >= get_num_regions()) {
-		return -EINVAL;
-	}
-
-	region_attr &= AUX_MPU_RDP_ATTR_MASK;
-
-	_region_init(index, base, size, region_attr);
-
-	return 0;
-}
-
-#if defined(CONFIG_USERSPACE)
-
-/**
- * @brief configure MPU regions for the memory partitions of the memory domain
- *
- * @param thread the thread which has memory domain
- */
-void arc_core_mpu_configure_mem_domain(struct k_thread *thread)
-{
-	int region_index =
-		get_region_index_by_type(THREAD_DOMAIN_PARTITION_REGION);
-	uint32_t num_partitions;
-	struct k_mem_partition *pparts;
-	struct k_mem_domain *mem_domain = NULL;
-
-	if (thread) {
-		mem_domain = thread->mem_domain_info.mem_domain;
-	}
-
-	if (mem_domain) {
-		LOG_DBG("configure domain: %p", mem_domain);
-		num_partitions = mem_domain->num_partitions;
-		pparts = mem_domain->partitions;
-	} else {
-		LOG_DBG("disable domain partition regions");
-		num_partitions = 0U;
-		pparts = NULL;
-	}
-
-	for (; region_index >= 0; region_index--) {
-		if (num_partitions) {
-			LOG_DBG("set region 0x%x 0x%lx 0x%x",
-				region_index, pparts->start, pparts->size);
-			_region_init(region_index, pparts->start,
-			 pparts->size, pparts->attr);
-			num_partitions--;
-		} else {
-			/* clear the left mpu entries */
-			_region_init(region_index, 0, 0, 0);
-		}
-		pparts++;
-	}
-}
-
-/**
- * @brief remove MPU regions for the memory partitions of the memory domain
- *
- * @param mem_domain the target memory domain
- */
-void arc_core_mpu_remove_mem_domain(struct k_mem_domain *mem_domain)
-{
-	ARG_UNUSED(mem_domain);
-
-	int region_index =
-		get_region_index_by_type(THREAD_DOMAIN_PARTITION_REGION);
-
-	for (; region_index >= 0; region_index--) {
-		_region_init(region_index, 0, 0, 0);
-	}
-}
-
-/**
- * @brief reset MPU region for a single memory partition
- *
- * @param domain  the target memory domain
- * @param partition_id  memory partition id
- */
-void arc_core_mpu_remove_mem_partition(struct k_mem_domain *domain,
-			uint32_t part_id)
-{
-	ARG_UNUSED(domain);
-
-	int region_index =
-		get_region_index_by_type(THREAD_DOMAIN_PARTITION_REGION);
-
-	LOG_DBG("disable region 0x%x", region_index + part_id);
-	/* Disable region */
-	_region_init(region_index + part_id, 0, 0, 0);
-}
-
-/**
- * @brief get the maximum number of free regions for memory domain partitions
- */
-int arc_core_mpu_get_max_domain_partition_regions(void)
-{
-	return get_region_index_by_type(THREAD_DOMAIN_PARTITION_REGION) + 1;
-}
-
-/**
- * @brief validate the given buffer is user accessible or not
- */
-int arc_core_mpu_buffer_validate(void *addr, size_t size, int write)
-{
-	int r_index;
-
-	/*
-	 * For ARC MPU v2, smaller region number takes priority.
-	 * we can stop the iteration immediately once we find the
-	 * matched region that grants permission or denies access.
-	 *
-	 */
-	for (r_index = 0; r_index < get_num_regions(); r_index++) {
-		if (!_is_enabled_region(r_index) ||
-		    !_is_in_region(r_index, (uint32_t)addr, size)) {
-			continue;
-		}
-
-		if (_is_user_accessible_region(r_index, write)) {
-			return 0;
-		} else {
-			return -EPERM;
-		}
-	}
-
-	return -EPERM;
-}
-#endif /* CONFIG_USERSPACE */
-
-/* ARC MPU Driver Initial Setup */
-/*
- * @brief MPU default initialization and configuration
- *
- * This function provides the default configuration mechanism for the Memory
- * Protection Unit (MPU).
- */
-static int arc_mpu_init(const struct device *arg)
-{
-	ARG_UNUSED(arg);
-
-	uint32_t num_regions;
-	uint32_t i;
-
-	num_regions = get_num_regions();
-
-	/* ARC MPU supports up to 16 Regions */
-	if (mpu_config.num_regions > num_regions) {
-		__ASSERT(0,
-		"Request to configure: %u regions (supported: %u)\n",
-		mpu_config.num_regions, num_regions);
-		return -EINVAL;
-	}
-
-	/* Disable MPU */
-	arc_core_mpu_disable();
-
-	int r_index;
-	/*
-	 * the MPU regions are filled in the reverse order.
-	 * According to ARCv2 ISA, the MPU region with smaller
-	 * index has higher priority. The static background MPU
-	 * regions in mpu_config will be in the bottom. Then
-	 * the special type regions will be above.
-	 *
-	 */
-	r_index = num_regions - mpu_config.num_regions;
-
-	/* clear all the regions first */
-	for (i = 0U; i < r_index; i++) {
-		_region_init(i, 0, 0, 0);
-	}
-
-	/* configure the static regions */
-	for (i = 0U; i < mpu_config.num_regions; i++) {
-		_region_init(r_index,
-			     mpu_config.mpu_regions[i].base,
-			     mpu_config.mpu_regions[i].size,
-			     mpu_config.mpu_regions[i].attr);
-		r_index++;
-	}
-
-	/* default region: no read, write and execute */
-	arc_core_mpu_default(0);
-
-	/* Enable MPU */
-	arc_core_mpu_enable();
-
-	return 0;
-}
-
-SYS_INIT(arc_mpu_init, PRE_KERNEL_1,
-	 CONFIG_KERNEL_INIT_PRIORITY_DEFAULT);
-
-#endif /* ZEPHYR_ARCH_ARC_CORE_MPU_ARC_MPU_V2_INTERNAL_H_ */

arch/arc/core/mpu/arc_mpu_v4_internal.h

@@ -1,896 +0,0 @@
-/*
- * Copyright (c) 2019 Synopsys.
- *
- * SPDX-License-Identifier: Apache-2.0
- */
-#ifndef ZEPHYR_ARCH_ARC_CORE_MPU_ARC_MPU_V4_INTERNAL_H_
-#define ZEPHYR_ARCH_ARC_CORE_MPU_ARC_MPU_V4_INTERNAL_H_
-
-#define AUX_MPU_RPER_SID1       0x10000
-/* valid mask: SID1+secure+valid */
-#define AUX_MPU_RPER_VALID_MASK ((0x1) | AUX_MPU_RPER_SID1 | AUX_MPU_ATTR_S)
-
-#define AUX_MPU_RPER_ATTR_MASK (0x1FF)
-
-/* For MPU version 4, the minimum protection region size is 32 bytes */
-#define ARC_FEATURE_MPU_ALIGNMENT_BITS 5
-
-#define CALC_REGION_END_ADDR(start, size) \
-	(start + size - (1 << ARC_FEATURE_MPU_ALIGNMENT_BITS))
-
-/* ARC MPU version 4 does not support mpu region overlap in hardware
- * so if we want to allocate MPU region dynamically, e.g. thread stack,
- * memory domain from a background region, a dynamic region splitting
- * approach is designed. pls see comments in
- *          _dynamic_region_allocate_and_init
- * But this approach has an impact on performance of thread switch.
- * As a trade off, we can use the default mpu region as the background region
- * to avoid the dynamic region splitting. This will give more privilege to
- * codes in kernel mode which can access the memory region not covered by
- * explicit mpu entry. Considering  memory protection is mainly used to
- * isolate malicious codes in user mode, it makes sense to get better
- * thread switch performance through default mpu region.
- * CONFIG_MPU_GAP_FILLING is used to turn this on/off.
- *
- */
-#if defined(CONFIG_MPU_GAP_FILLING)
-
-#if defined(CONFIG_USERSPACE) && defined(CONFIG_MPU_STACK_GUARD)
-/* 1 for stack guard , 1 for user thread, 1 for split */
-#define MPU_REGION_NUM_FOR_THREAD 3
-#elif defined(CONFIG_USERSPACE) || defined(CONFIG_MPU_STACK_GUARD)
-/* 1 for stack guard or user thread stack , 1 for split */
-#define MPU_REGION_NUM_FOR_THREAD 2
-#else
-#define MPU_REGION_NUM_FOR_THREAD 0
-#endif
-
-#define MPU_DYNAMIC_REGION_AREAS_NUM 2
-
-/**
- * @brief internal structure holding information of
- * memory areas where dynamic MPU programming is allowed.
- */
-struct dynamic_region_info {
-	uint8_t index;
-	uint32_t base;
-	uint32_t size;
-	uint32_t attr;
-};
-
-static uint8_t dynamic_regions_num;
-static uint8_t dynamic_region_index;
-
-/**
- * Global array, holding the MPU region index of
- * the memory region inside which dynamic memory
- * regions may be configured.
- */
-static struct dynamic_region_info dyn_reg_info[MPU_DYNAMIC_REGION_AREAS_NUM];
-#endif /* CONFIG_MPU_GAP_FILLING */
-
-static uint8_t static_regions_num;
-
-#ifdef CONFIG_ARC_NORMAL_FIRMWARE
-/* \todo through secure service to access mpu */
-static inline void _region_init(uint32_t index, uint32_t region_addr, uint32_t size,
-				uint32_t region_attr)
-{
-}
-
-static inline void _region_set_attr(uint32_t index, uint32_t attr)
-{
-
-}
-
-static inline uint32_t _region_get_attr(uint32_t index)
-{
-	return 0;
-}
-
-static inline uint32_t _region_get_start(uint32_t index)
-{
-	return 0;
-}
-
-static inline void _region_set_start(uint32_t index, uint32_t start)
-{
-
-}
-
-static inline uint32_t _region_get_end(uint32_t index)
-{
-	return 0;
-}
-
-static inline void _region_set_end(uint32_t index, uint32_t end)
-{
-}
-
-/**
- * This internal function probes the given addr's MPU index.if not
- * in MPU, returns error
- */
-static inline int _mpu_probe(uint32_t addr)
-{
-	return -EINVAL;
-}
-
-/**
- * This internal function checks if MPU region is enabled or not
- */
-static inline bool _is_enabled_region(uint32_t r_index)
-{
-	return false;
-}
-
-/**
- * This internal function check if the region is user accessible or not
- */
-static inline bool _is_user_accessible_region(uint32_t r_index, int write)
-{
-	return false;
-}
-#else /* CONFIG_ARC_NORMAL_FIRMWARE */
-/* the following functions are prepared for SECURE_FRIMWARE */
-static inline void _region_init(uint32_t index, uint32_t region_addr, uint32_t size,
-				uint32_t region_attr)
-{
-	if (size < (1 << ARC_FEATURE_MPU_ALIGNMENT_BITS)) {
-		size = (1 << ARC_FEATURE_MPU_ALIGNMENT_BITS);
-	}
-
-	if (region_attr) {
-		region_attr &= AUX_MPU_RPER_ATTR_MASK;
-		region_attr |=  AUX_MPU_RPER_VALID_MASK;
-	}
-
-	z_arc_v2_aux_reg_write(_ARC_V2_MPU_INDEX, index);
-	z_arc_v2_aux_reg_write(_ARC_V2_MPU_RSTART, region_addr);
-	z_arc_v2_aux_reg_write(_ARC_V2_MPU_REND,
-			CALC_REGION_END_ADDR(region_addr, size));
-	z_arc_v2_aux_reg_write(_ARC_V2_MPU_RPER, region_attr);
-}
-
-static inline void _region_set_attr(uint32_t index, uint32_t attr)
-{
-	z_arc_v2_aux_reg_write(_ARC_V2_MPU_INDEX, index);
-	z_arc_v2_aux_reg_write(_ARC_V2_MPU_RPER, attr |
-				 AUX_MPU_RPER_VALID_MASK);
-}
-
-static inline uint32_t _region_get_attr(uint32_t index)
-{
-	z_arc_v2_aux_reg_write(_ARC_V2_MPU_INDEX, index);
-
-	return z_arc_v2_aux_reg_read(_ARC_V2_MPU_RPER);
-}
-
-static inline uint32_t _region_get_start(uint32_t index)
-{
-	z_arc_v2_aux_reg_write(_ARC_V2_MPU_INDEX, index);
-
-	return z_arc_v2_aux_reg_read(_ARC_V2_MPU_RSTART);
-}
-
-static inline void _region_set_start(uint32_t index, uint32_t start)
-{
-	z_arc_v2_aux_reg_write(_ARC_V2_MPU_INDEX, index);
-	z_arc_v2_aux_reg_write(_ARC_V2_MPU_RSTART, start);
-}
-
-static inline uint32_t _region_get_end(uint32_t index)
-{
-	z_arc_v2_aux_reg_write(_ARC_V2_MPU_INDEX, index);
-
-	return z_arc_v2_aux_reg_read(_ARC_V2_MPU_REND) +
-		(1 << ARC_FEATURE_MPU_ALIGNMENT_BITS);
-}
-
-static inline void _region_set_end(uint32_t index, uint32_t end)
-{
-	z_arc_v2_aux_reg_write(_ARC_V2_MPU_INDEX, index);
-	z_arc_v2_aux_reg_write(_ARC_V2_MPU_REND, end -
-		(1 << ARC_FEATURE_MPU_ALIGNMENT_BITS));
-}
-
-/**
- * This internal function probes the given addr's MPU index.if not
- * in MPU, returns error
- */
-static inline int _mpu_probe(uint32_t addr)
-{
-	uint32_t val;
-
-	z_arc_v2_aux_reg_write(_ARC_V2_MPU_PROBE, addr);
-	val = z_arc_v2_aux_reg_read(_ARC_V2_MPU_INDEX);
-
-	/* if no match or multiple regions match, return error */
-	if (val & 0xC0000000) {
-		return -EINVAL;
-	} else {
-		return val;
-	}
-}
-
-/**
- * This internal function checks if MPU region is enabled or not
- */
-static inline bool _is_enabled_region(uint32_t r_index)
-{
-	z_arc_v2_aux_reg_write(_ARC_V2_MPU_INDEX, r_index);
-	return ((z_arc_v2_aux_reg_read(_ARC_V2_MPU_RPER) &
-		 AUX_MPU_RPER_VALID_MASK) == AUX_MPU_RPER_VALID_MASK);
-}
-
-/**
- * This internal function check if the region is user accessible or not
- */
-static inline bool _is_user_accessible_region(uint32_t r_index, int write)
-{
-	uint32_t r_ap;
-
-	z_arc_v2_aux_reg_write(_ARC_V2_MPU_INDEX, r_index);
-	r_ap = z_arc_v2_aux_reg_read(_ARC_V2_MPU_RPER);
-	r_ap &= AUX_MPU_RPER_ATTR_MASK;
-
-	if (write) {
-		return ((r_ap & (AUX_MPU_ATTR_UW | AUX_MPU_ATTR_KW)) ==
-			(AUX_MPU_ATTR_UW | AUX_MPU_ATTR_KW));
-	}
-
-	return ((r_ap & (AUX_MPU_ATTR_UR | AUX_MPU_ATTR_KR)) ==
-		(AUX_MPU_ATTR_UR | AUX_MPU_ATTR_KR));
-}
-
-#endif /* CONFIG_ARC_NORMAL_FIRMWARE */
-
-/**
- * This internal function checks the area given by (start, size)
- * and returns the index if the area match one MPU entry
- */
-static inline int _get_region_index(uint32_t start, uint32_t size)
-{
-	int index = _mpu_probe(start);
-
-	if (index > 0 && index == _mpu_probe(start + size - 1)) {
-		return index;
-	}
-
-	return -EINVAL;
-}
-
-#if defined(CONFIG_MPU_GAP_FILLING)
-/**
- * This internal function allocates a dynamic MPU region and returns
- * the index or error
- */
-static inline int _dynamic_region_allocate_index(void)
-{
-	if (dynamic_region_index >= get_num_regions()) {
-		LOG_ERR("no enough mpu entries %d", dynamic_region_index);
-		return -EINVAL;
-	}
-
-	return dynamic_region_index++;
-}
-
-/* @brief allocate and init a dynamic MPU region
- *
- * This internal function performs the allocation and initialization of
- * a dynamic MPU region
- *
- * @param base region base
- * @param size region size
- * @param attr region attribute
- * @return  <0 failure, >0  allocated dynamic region index
- */
-static int _dynamic_region_allocate_and_init(uint32_t base, uint32_t size,
-	 uint32_t attr)
-{
-	int u_region_index = _get_region_index(base, size);
-	int region_index;
-
-	LOG_DBG("Region info: base 0x%x size 0x%x attr 0x%x", base, size, attr);
-
-	if (u_region_index == -EINVAL) {
-		/* no underlying region */
-
-		region_index = _dynamic_region_allocate_index();
-
-		if (region_index > 0) {
-		/* a new region */
-			_region_init(region_index, base, size, attr);
-		}
-
-		return region_index;
-	}
-
-	/*
-	 * The new memory region is to be placed inside the underlying
-	 * region, possibly splitting the underlying region into two.
-	 */
-
-	uint32_t u_region_start = _region_get_start(u_region_index);
-	uint32_t u_region_end = _region_get_end(u_region_index);
-	uint32_t u_region_attr = _region_get_attr(u_region_index);
-	uint32_t end = base + size;
-
-
-	if ((base == u_region_start) && (end == u_region_end)) {
-		/* The new region overlaps entirely with the
-		 * underlying region. In this case we simply
-		 * update the partition attributes of the
-		 * underlying region with those of the new
-		 * region.
-		 */
-		_region_init(u_region_index, base, size, attr);
-		region_index = u_region_index;
-	} else if (base == u_region_start) {
-		/* The new region starts exactly at the start of the
-		 * underlying region; the start of the underlying
-		 * region needs to be set to the end of the new region.
-		 */
-		_region_set_start(u_region_index, base + size);
-		_region_set_attr(u_region_index, u_region_attr);
-
-		region_index = _dynamic_region_allocate_index();
-
-		if (region_index > 0) {
-			_region_init(region_index, base, size, attr);
-		}
-
-	} else if (end == u_region_end) {
-		/* The new region ends exactly at the end of the
-		 * underlying region; the end of the underlying
-		 * region needs to be set to the start of the
-		 * new region.
-		 */
-		_region_set_end(u_region_index, base);
-		_region_set_attr(u_region_index, u_region_attr);
-
-		region_index = _dynamic_region_allocate_index();
-
-		if (region_index > 0) {
-			_region_init(region_index, base, size, attr);
-		}
-
-	} else {
-		/* The new region lies strictly inside the
-		 * underlying region, which needs to split
-		 * into two regions.
-		 */
-
-		_region_set_end(u_region_index, base);
-		_region_set_attr(u_region_index, u_region_attr);
-
-		region_index = _dynamic_region_allocate_index();
-
-		if (region_index > 0) {
-			_region_init(region_index, base, size, attr);
-
-			region_index = _dynamic_region_allocate_index();
-
-			if (region_index > 0) {
-				_region_init(region_index, base + size,
-				 u_region_end - end, u_region_attr);
-			}
-		}
-	}
-
-	return region_index;
-}
-
-/* @brief reset the dynamic MPU regions
- *
- * This internal function performs the reset of dynamic MPU regions
- */
-static void _mpu_reset_dynamic_regions(void)
-{
-	uint32_t i;
-	uint32_t num_regions = get_num_regions();
-
-	for (i = static_regions_num; i < num_regions; i++) {
-		_region_init(i, 0, 0, 0);
-	}
-
-	for (i = 0U; i < dynamic_regions_num; i++) {
-		_region_init(
-			dyn_reg_info[i].index,
-			dyn_reg_info[i].base,
-			dyn_reg_info[i].size,
-			dyn_reg_info[i].attr);
-	}
-
-	/* dynamic regions are after static regions */
-	dynamic_region_index = static_regions_num;
-}
-
-/**
- * @brief configure the base address and size for an MPU region
- *
- * @param   type    MPU region type
- * @param   base    base address in RAM
- * @param   size    size of the region
- */
-static inline int _mpu_configure(uint8_t type, uint32_t base, uint32_t size)
-{
-	uint32_t region_attr = get_region_attr_by_type(type);
-
-	return _dynamic_region_allocate_and_init(base, size, region_attr);
-}
-#else
-/**
- * This internal function is utilized by the MPU driver to parse the intent
- * type (i.e. THREAD_STACK_REGION) and return the correct region index.
- */
-static inline int get_region_index_by_type(uint32_t type)
-{
-	/*
-	 * The new MPU regions are allocated per type after the statically
-	 * configured regions. The type is one-indexed rather than
-	 * zero-indexed.
-	 *
-	 * For ARC MPU v2, the smaller index has higher priority, so the
-	 * index is allocated in reverse order. Static regions start from
-	 * the biggest index, then thread related regions.
-	 *
-	 */
-	switch (type) {
-	case THREAD_STACK_USER_REGION:
-		return static_regions_num + THREAD_STACK_REGION;
-	case THREAD_STACK_REGION:
-	case THREAD_APP_DATA_REGION:
-	case THREAD_STACK_GUARD_REGION:
-		return static_regions_num + type;
-	case THREAD_DOMAIN_PARTITION_REGION:
-#if defined(CONFIG_MPU_STACK_GUARD)
-		return static_regions_num + type;
-#else
-		/*
-		 * Start domain partition region from stack guard region
-		 * since stack guard is not enabled.
-		 */
-		return static_regions_num + type - 1;
-#endif
-	default:
-		__ASSERT(0, "Unsupported type");
-		return -EINVAL;
-	}
-}
-
-/**
- * @brief configure the base address and size for an MPU region
- *
- * @param   type    MPU region type
- * @param   base    base address in RAM
- * @param   size    size of the region
- */
-static inline int _mpu_configure(uint8_t type, uint32_t base, uint32_t size)
-{
-	int region_index =  get_region_index_by_type(type);
-	uint32_t region_attr = get_region_attr_by_type(type);
-
-	LOG_DBG("Region info: 0x%x 0x%x", base, size);
-
-	if (region_attr == 0U || region_index < 0) {
-		return -EINVAL;
-	}
-
-	_region_init(region_index, base, size, region_attr);
-
-	return 0;
-}
-#endif
-
-/* ARC Core MPU Driver API Implementation for ARC MPUv3 */
-
-/**
- * @brief enable the MPU
- */
-void arc_core_mpu_enable(void)
-{
-#ifdef CONFIG_ARC_SECURE_FIRMWARE
-/* the default region:
- * secure:0x8000, SID:0x10000, KW:0x100 KR:0x80
- */
-#define MPU_ENABLE_ATTR	0x18180
-#else
-#define MPU_ENABLE_ATTR	0
-#endif
-	arc_core_mpu_default(MPU_ENABLE_ATTR);
-}
-
-/**
- * @brief disable the MPU
- */
-void arc_core_mpu_disable(void)
-{
-	/* MPU is always enabled, use default region to
-	 * simulate MPU disable
-	 */
-	arc_core_mpu_default(REGION_ALL_ATTR | AUX_MPU_ATTR_S |
-				AUX_MPU_RPER_SID1);
-}
-
-/**
- * @brief configure the thread's mpu regions
- *
- * @param thread the target thread
- */
-void arc_core_mpu_configure_thread(struct k_thread *thread)
-{
-#if defined(CONFIG_MPU_GAP_FILLING)
-/* the mpu entries of ARC MPUv4 are divided into 2 parts:
- * static entries: global mpu entries, not changed in context switch
- * dynamic entries: MPU entries changed in context switch and
- * memory domain configure, including:
- *    MPU entries for user thread stack
- *    MPU entries for stack guard
- *    MPU entries for mem domain
- *    MPU entries for other thread specific regions
- * before configuring thread specific mpu entries, need to reset dynamic
- * entries
- */
-	_mpu_reset_dynamic_regions();
-#endif
-#if defined(CONFIG_MPU_STACK_GUARD)
-	uint32_t guard_start;
-
-	/* Set location of guard area when the thread is running in
-	 * supervisor mode. For a supervisor thread, this is just low
-	 * memory in the stack buffer. For a user thread, it only runs
-	 * in supervisor mode when handling a system call on the privilege
-	 * elevation stack.
-	 */
-#if defined(CONFIG_USERSPACE)
-	if ((thread->base.user_options & K_USER) != 0U) {
-		guard_start = thread->arch.priv_stack_start;
-	} else
-#endif
-	{
-		guard_start = thread->stack_info.start;
-	}
-	guard_start -= Z_ARC_STACK_GUARD_SIZE;
-
-	if (_mpu_configure(THREAD_STACK_GUARD_REGION, guard_start,
-		Z_ARC_STACK_GUARD_SIZE) < 0) {
-		LOG_ERR("thread %p's stack guard failed", thread);
-		return;
-	}
-#endif /* CONFIG_MPU_STACK_GUARD */
-
-#if defined(CONFIG_USERSPACE)
-	/* configure stack region of user thread */
-	if (thread->base.user_options & K_USER) {
-		LOG_DBG("configure user thread %p's stack", thread);
-		if (_mpu_configure(THREAD_STACK_USER_REGION,
-				   (uint32_t)thread->stack_info.start,
-				   thread->stack_info.size) < 0) {
-			LOG_ERR("thread %p's stack failed", thread);
-			return;
-		}
-	}
-
-#if defined(CONFIG_MPU_GAP_FILLING)
-	uint32_t num_partitions;
-	struct k_mem_partition *pparts;
-	struct k_mem_domain *mem_domain = thread->mem_domain_info.mem_domain;
-
-	/* configure thread's memory domain */
-	if (mem_domain) {
-		LOG_DBG("configure thread %p's domain: %p",
-		 thread, mem_domain);
-		num_partitions = mem_domain->num_partitions;
-		pparts = mem_domain->partitions;
-	} else {
-		num_partitions = 0U;
-		pparts = NULL;
-	}
-
-	for (uint32_t i = 0; i < num_partitions; i++) {
-		if (pparts->size) {
-			if (_dynamic_region_allocate_and_init(pparts->start,
-				pparts->size, pparts->attr) < 0) {
-				LOG_ERR(
-				"thread %p's mem region: %p failed",
-				 thread, pparts);
-				return;
-			}
-		}
-		pparts++;
-	}
-#else
-	arc_core_mpu_configure_mem_domain(thread);
-#endif
-#endif
-}
-
-/**
- * @brief configure the default region
- *
- * @param region_attr region attribute of default region
- */
-void arc_core_mpu_default(uint32_t region_attr)
-{
-#ifdef CONFIG_ARC_NORMAL_FIRMWARE
-/* \todo through secure service to access mpu */
-#else
-	z_arc_v2_aux_reg_write(_ARC_V2_MPU_EN, region_attr);
-#endif
-}
-
-/**
- * @brief configure the MPU region
- *
- * @param index MPU region index
- * @param base  base address
- * @param size  region size
- * @param region_attr region attribute
- */
-int arc_core_mpu_region(uint32_t index, uint32_t base, uint32_t size,
-			 uint32_t region_attr)
-{
-	if (index >= get_num_regions()) {
-		return -EINVAL;
-	}
-
-	region_attr &= AUX_MPU_RPER_ATTR_MASK;
-
-	_region_init(index, base, size, region_attr);
-
-	return 0;
-}
-
-#if defined(CONFIG_USERSPACE)
-/**
- * @brief configure MPU regions for the memory partitions of the memory domain
- *
- * @param thread the thread which has memory domain
- */
-#if defined(CONFIG_MPU_GAP_FILLING)
-void arc_core_mpu_configure_mem_domain(struct k_thread *thread)
-{
-	arc_core_mpu_configure_thread(thread);
-}
-#else
-void arc_core_mpu_configure_mem_domain(struct k_thread *thread)
-{
-	uint32_t region_index;
-	uint32_t num_partitions;
-	uint32_t num_regions;
-	struct k_mem_partition *pparts;
-	struct k_mem_domain *mem_domain = NULL;
-
-	if (thread) {
-		mem_domain = thread->mem_domain_info.mem_domain;
-	}
-
-	if (mem_domain) {
-		LOG_DBG("configure domain: %p", mem_domain);
-		num_partitions = mem_domain->num_partitions;
-		pparts = mem_domain->partitions;
-	} else {
-		LOG_DBG("disable domain partition regions");
-		num_partitions = 0U;
-		pparts = NULL;
-	}
-
-	num_regions = get_num_regions();
-	region_index = get_region_index_by_type(THREAD_DOMAIN_PARTITION_REGION);
-
-	while (num_partitions && region_index < num_regions) {
-		if (pparts->size > 0) {
-			LOG_DBG("set region 0x%x 0x%lx 0x%x",
-				region_index, pparts->start, pparts->size);
-			_region_init(region_index, pparts->start,
-				     pparts->size, pparts->attr);
-			region_index++;
-		}
-		pparts++;
-		num_partitions--;
-	}
-
-	while (region_index < num_regions) {
-		/* clear the left mpu entries */
-		_region_init(region_index, 0, 0, 0);
-		region_index++;
-	}
-}
-#endif
-
-/**
- * @brief remove MPU regions for the memory partitions of the memory domain
- *
- * @param mem_domain the target memory domain
- */
-void arc_core_mpu_remove_mem_domain(struct k_mem_domain *mem_domain)
-{
-	uint32_t num_partitions;
-	struct k_mem_partition *pparts;
-	int index;
-
-	if (mem_domain) {
-		LOG_DBG("configure domain: %p", mem_domain);
-		num_partitions = mem_domain->num_partitions;
-		pparts = mem_domain->partitions;
-	} else {
-		LOG_DBG("disable domain partition regions");
-		num_partitions = 0U;
-		pparts = NULL;
-	}
-
-	for (uint32_t i = 0; i < num_partitions; i++) {
-		if (pparts->size) {
-			index = _get_region_index(pparts->start,
-			 pparts->size);
-			if (index > 0) {
-#if defined(CONFIG_MPU_GAP_FILLING)
-				_region_set_attr(index,
-				REGION_KERNEL_RAM_ATTR);
-#else
-				_region_init(index, 0, 0, 0);
-#endif
-			}
-		}
-		pparts++;
-	}
-}
-
-/**
- * @brief reset MPU region for a single memory partition
- *
- * @param partition_id  memory partition id
- */
-void arc_core_mpu_remove_mem_partition(struct k_mem_domain *domain,
-			uint32_t partition_id)
-{
-	struct k_mem_partition *partition = &domain->partitions[partition_id];
-
-	int region_index = _get_region_index(partition->start,
-			 partition->size);
-
-	if (region_index < 0) {
-		return;
-	}
-
-	LOG_DBG("remove region 0x%x", region_index);
-#if defined(CONFIG_MPU_GAP_FILLING)
-	_region_set_attr(region_index, REGION_KERNEL_RAM_ATTR);
-#else
-	_region_init(region_index, 0, 0, 0);
-#endif
-}
-
-/**
- * @brief get the maximum number of free regions for memory domain partitions
- */
-int arc_core_mpu_get_max_domain_partition_regions(void)
-{
-#if defined(CONFIG_MPU_GAP_FILLING)
-	/* consider the worst case: each partition requires split */
-	return (get_num_regions() - MPU_REGION_NUM_FOR_THREAD) / 2;
-#else
-	return get_num_regions() -
-	       get_region_index_by_type(THREAD_DOMAIN_PARTITION_REGION) - 1;
-#endif
-}
-
-/**
- * @brief validate the given buffer is user accessible or not
- */
-int arc_core_mpu_buffer_validate(void *addr, size_t size, int write)
-{
-	int r_index;
-	int key = arch_irq_lock();
-
-	/*
-	 * For ARC MPU v4, overlapping is not supported.
-	 * we can stop the iteration immediately once we find the
-	 * matched region that grants permission or denies access.
-	 */
-	r_index = _mpu_probe((uint32_t)addr);
-	/*  match and the area is in one region */
-	if (r_index >= 0 && r_index == _mpu_probe((uint32_t)addr + (size - 1))) {
-		if (_is_user_accessible_region(r_index, write)) {
-			r_index = 0;
-		} else {
-			r_index = -EPERM;
-		}
-	} else {
-		r_index = -EPERM;
-	}
-
-	arch_irq_unlock(key);
-
-	return r_index;
-}
-#endif /* CONFIG_USERSPACE */
-
-/* ARC MPU Driver Initial Setup */
-/*
- * @brief MPU default initialization and configuration
- *
- * This function provides the default configuration mechanism for the Memory
- * Protection Unit (MPU).
- */
-static int arc_mpu_init(const struct device *arg)
-{
-	ARG_UNUSED(arg);
-	uint32_t num_regions;
-	uint32_t i;
-
-	num_regions = get_num_regions();
-
-	/* ARC MPU supports up to 16 Regions */
-	if (mpu_config.num_regions > num_regions) {
-		__ASSERT(0,
-		"Request to configure: %u regions (supported: %u)\n",
-		mpu_config.num_regions, num_regions);
-		return -EINVAL;
-	}
-
-	static_regions_num = 0U;
-
-	/* Disable MPU */
-	arc_core_mpu_disable();
-
-	for (i = 0U; i < mpu_config.num_regions; i++) {
-		/* skip empty region */
-		if (mpu_config.mpu_regions[i].size == 0) {
-			continue;
-		}
-#if defined(CONFIG_MPU_GAP_FILLING)
-		_region_init(static_regions_num,
-			     mpu_config.mpu_regions[i].base,
-			     mpu_config.mpu_regions[i].size,
-			     mpu_config.mpu_regions[i].attr);
-
-		/* record the static region which can be split */
-		if (mpu_config.mpu_regions[i].attr & REGION_DYNAMIC) {
-			if (dynamic_regions_num >=
-			MPU_DYNAMIC_REGION_AREAS_NUM) {
-				LOG_ERR("not enough dynamic regions %d",
-				 dynamic_regions_num);
-				return -EINVAL;
-			}
-
-			dyn_reg_info[dynamic_regions_num].index = i;
-			dyn_reg_info[dynamic_regions_num].base =
-				mpu_config.mpu_regions[i].base;
-			dyn_reg_info[dynamic_regions_num].size =
-				mpu_config.mpu_regions[i].size;
-			dyn_reg_info[dynamic_regions_num].attr =
-				mpu_config.mpu_regions[i].attr;
-
-			dynamic_regions_num++;
-		}
-		static_regions_num++;
-#else
-		/* dynamic region will be covered by default mpu setting
-		 * no need to configure
-		 */
-		if (!(mpu_config.mpu_regions[i].attr & REGION_DYNAMIC)) {
-			_region_init(static_regions_num,
-			     mpu_config.mpu_regions[i].base,
-			     mpu_config.mpu_regions[i].size,
-			     mpu_config.mpu_regions[i].attr);
-			static_regions_num++;
-		}
-#endif
-	}
-
-	for (i = static_regions_num; i < num_regions; i++) {
-		_region_init(i, 0, 0, 0);
-	}
-
-	/* Enable MPU */
-	arc_core_mpu_enable();
-
-	return 0;
-}
-
-SYS_INIT(arc_mpu_init, PRE_KERNEL_1,
-	 CONFIG_KERNEL_INIT_PRIORITY_DEFAULT);
-
-#endif /* ZEPHYR_ARCH_ARC_CORE_MPU_ARC_MPU_V4_INTERNAL_H_ */

arch/arc/core/offsets/offsets.c

@@ -22,25 +22,16 @@
  * completeness.
  */
 
-#include <kernel.h>
-#include <kernel_arch_data.h>
 #include <gen_offset.h>
+#include <kernel_structs.h>
 #include <kernel_offsets.h>
 
+GEN_OFFSET_SYM(_thread_arch_t, intlock_key);
 GEN_OFFSET_SYM(_thread_arch_t, relinquish_cause);
+GEN_OFFSET_SYM(_thread_arch_t, return_value);
 #ifdef CONFIG_ARC_STACK_CHECKING
-GEN_OFFSET_SYM(_thread_arch_t, k_stack_base);
-GEN_OFFSET_SYM(_thread_arch_t, k_stack_top);
-#ifdef CONFIG_USERSPACE
-GEN_OFFSET_SYM(_thread_arch_t, u_stack_base);
-GEN_OFFSET_SYM(_thread_arch_t, u_stack_top);
+GEN_OFFSET_SYM(_thread_arch_t, stack_base);
 #endif
-#endif
-
-#ifdef CONFIG_USERSPACE
-GEN_OFFSET_SYM(_thread_arch_t, priv_stack_start);
-#endif
-
 
 /* ARCv2-specific IRQ stack frame structure member offsets */
 GEN_OFFSET_SYM(_isf_t, r0);
@@ -58,20 +49,15 @@ GEN_OFFSET_SYM(_isf_t, r11);
 GEN_OFFSET_SYM(_isf_t, r12);
 GEN_OFFSET_SYM(_isf_t, r13);
 GEN_OFFSET_SYM(_isf_t, blink);
-#ifdef CONFIG_ARC_HAS_ZOL
 GEN_OFFSET_SYM(_isf_t, lp_end);
 GEN_OFFSET_SYM(_isf_t, lp_start);
 GEN_OFFSET_SYM(_isf_t, lp_count);
-#endif /* CONFIG_ARC_HAS_ZOL */
 #ifdef CONFIG_CODE_DENSITY
 GEN_OFFSET_SYM(_isf_t, ei_base);
 GEN_OFFSET_SYM(_isf_t, ldi_base);
 GEN_OFFSET_SYM(_isf_t, jli_base);
 #endif
 GEN_OFFSET_SYM(_isf_t, pc);
-#ifdef CONFIG_ARC_HAS_SECURE
-GEN_OFFSET_SYM(_isf_t, sec_stat);
-#endif
 GEN_OFFSET_SYM(_isf_t, status32);
 GEN_ABSOLUTE_SYM(___isf_t_SIZEOF, sizeof(_isf_t));
 
@@ -93,20 +79,10 @@ GEN_OFFSET_SYM(_callee_saved_stack_t, r24);
 GEN_OFFSET_SYM(_callee_saved_stack_t, r25);
 GEN_OFFSET_SYM(_callee_saved_stack_t, r26);
 GEN_OFFSET_SYM(_callee_saved_stack_t, fp);
-#ifdef CONFIG_USERSPACE
-#ifdef CONFIG_ARC_HAS_SECURE
-GEN_OFFSET_SYM(_callee_saved_stack_t, kernel_sp);
-GEN_OFFSET_SYM(_callee_saved_stack_t, user_sp);
-#else
-GEN_OFFSET_SYM(_callee_saved_stack_t, user_sp);
-#endif
-#endif
 GEN_OFFSET_SYM(_callee_saved_stack_t, r30);
-#ifdef CONFIG_ARC_HAS_ACCL_REGS
+#ifdef CONFIG_FP_SHARING
 GEN_OFFSET_SYM(_callee_saved_stack_t, r58);
 GEN_OFFSET_SYM(_callee_saved_stack_t, r59);
-#endif
-#ifdef CONFIG_FPU_SHARING
 GEN_OFFSET_SYM(_callee_saved_stack_t, fpu_status);
 GEN_OFFSET_SYM(_callee_saved_stack_t, fpu_ctrl);
 #ifdef CONFIG_FP_FPU_DA

arch/arc/core/prep_c.c

@@ -10,7 +10,7 @@
  *
  *
  * Initialization of full C support: zero the .bss, copy the .data if XIP,
- * call z_cstart().
+ * call _Cstart().
  *
  * Stack is available in this module, but not the global data/bss until their
  * initialization is performed.
@@ -21,7 +21,7 @@
 #include <linker/linker-defs.h>
 #include <arch/arc/v2/aux_regs.h>
 #include <kernel_structs.h>
-#include <kernel_internal.h>
+#include <nano_internal.h>
 
 
 /* XXX - keep for future use in full-featured cache APIs */
@@ -40,14 +40,14 @@ static void disable_icache(void)
 {
 	unsigned int val;
 
-	val = z_arc_v2_aux_reg_read(_ARC_V2_I_CACHE_BUILD);
+	val = _arc_v2_aux_reg_read(_ARC_V2_I_CACHE_BUILD);
 	val &= 0xff; /* version field */
 	if (val == 0) {
 		return; /* skip if i-cache is not present */
 	}
-	z_arc_v2_aux_reg_write(_ARC_V2_IC_IVIC, 0);
-	__builtin_arc_nop();
-	z_arc_v2_aux_reg_write(_ARC_V2_IC_CTRL, 1);
+	_arc_v2_aux_reg_write(_ARC_V2_IC_IVIC, 0);
+	__asm__ __volatile__ ("nop");
+	_arc_v2_aux_reg_write(_ARC_V2_IC_CTRL, 1);
 }
 
 /**
@@ -64,16 +64,44 @@ static void invalidate_dcache(void)
 {
 	unsigned int val;
 
-	val = z_arc_v2_aux_reg_read(_ARC_V2_D_CACHE_BUILD);
+	val = _arc_v2_aux_reg_read(_ARC_V2_D_CACHE_BUILD);
 	val &= 0xff; /* version field */
 	if (val == 0) {
 		return; /* skip if d-cache is not present */
 	}
-	z_arc_v2_aux_reg_write(_ARC_V2_DC_IVDC, 1);
+	_arc_v2_aux_reg_write(_ARC_V2_DC_IVDC, 1);
 }
 #endif
 
-extern FUNC_NORETURN void z_cstart(void);
+/**
+ *
+ * @brief Adjust the vector table base
+ *
+ * Set the vector table base if the value found in the
+ * _ARC_V2_IRQ_VECT_BASE auxiliary register is different from the
+ * _VectorTable known by software. It is important to do this very early
+ * so that exception vectors can be handled.
+ *
+ * @return N/A
+ */
+
+static void adjust_vector_table_base(void)
+{
+	extern struct vector_table _VectorTable;
+	unsigned int vbr;
+	/* if the compiled-in vector table is different
+	 * from the base address known by the ARC CPU,
+	 * set the vector base to the compiled-in address.
+	 */
+	vbr = _arc_v2_aux_reg_read(_ARC_V2_IRQ_VECT_BASE);
+	vbr &= 0xfffffc00;
+	if (vbr != (unsigned int)&_VectorTable) {
+		_arc_v2_aux_reg_write(_ARC_V2_IRQ_VECT_BASE,
+					(unsigned int)&_VectorTable);
+	}
+}
+
+extern FUNC_NORETURN void _Cstart(void);
 /**
  *
  * @brief Prepare to and run C code
@@ -85,8 +113,10 @@ extern FUNC_NORETURN void z_cstart(void);
 
 void _PrepC(void)
 {
-	z_bss_zero();
-	z_data_copy();
-	z_cstart();
+	_icache_setup();
+	adjust_vector_table_base();
+	_bss_zero();
+	_data_copy();
+	_Cstart();
 	CODE_UNREACHABLE;
 }

arch/arc/core/regular_irq.S

@@ -17,177 +17,24 @@
 #include <kernel_structs.h>
 #include <offsets_short.h>
 #include <toolchain.h>
-#include <linker/sections.h>
 #include <arch/cpu.h>
 #include <swap_macros.h>
-#include <arch/arc/asm-compat/assembler.h>
 
 GTEXT(_rirq_enter)
 GTEXT(_rirq_exit)
-GTEXT(_rirq_newthread_switch)
+GTEXT(_rirq_common_interrupt_swap)
+GDATA(exc_nest_count)
 
-/*
+#if 0 /* TODO: when FIRQ is not present, all would be regular */
+#define NUM_REGULAR_IRQ_PRIO_LEVELS CONFIG_NUM_IRQ_PRIO_LEVELS
+#else
+#define NUM_REGULAR_IRQ_PRIO_LEVELS (CONFIG_NUM_IRQ_PRIO_LEVELS-1)
+#endif
+/* note: the above define assumes that prio 0 IRQ is for FIRQ, and
+ * that all others are regular interrupts.
+ * TODO: Revist this if FIRQ becomes configurable.
+ */
 
-===========================================================
- RETURN FROM INTERRUPT TO COOPERATIVE THREAD
-===========================================================
-
-That's a special case because:
- 1. We return from IRQ handler to a cooperative thread
- 2. During IRQ handling context switch did happen
- 3. Returning to a thread which previously gave control
-    to another thread because of:
-     - Calling k_sleep()
-     - Explicitly yielding
-     - Bumping into locked sync primitive etc
-
-What (3) means is before passing control to another thread our thread
-in question:
- a. Stashed all precious caller-saved registers on its stack
- b. Pushed return address to the top of the stack as well
-
-That's how thread's stack looks like right before jumping to another thread:
------------------------------>8---------------------------------
-PRE-CONTEXT-SWITCH STACK
-
-  lower_addr, let's say: 0x1000
-
-         --------------------------------------
-  SP ->  | Return address; PC (Program Counter), in fact value taken from
-         | BLINK register in arch_switch()
-         --------------------------------------
-         | STATUS32 value, we explicitly save it here for later usage, read-on
-         --------------------------------------
-         | Caller-saved registers: some of R0-R12
-         --------------------------------------
-         |...
-         |...
-
-  higher_addr, let's say: 0x2000
------------------------------>8---------------------------------
-
-When context gets switched the kernel saves callee-saved registers in the
-thread's stack right on top of pre-switch contents so that's what we have:
------------------------------>8---------------------------------
-POST-CONTEXT-SWITCH STACK
-
-  lower_addr, let's say: 0x1000
-
-         --------------------------------------
-SP ->    | Callee-saved registers: see struct _callee_saved_stack{}
-         |  |- R13
-         |  |- R14
-         |  | ...
-         |  \- FP
-         |   ...
-         --------------------------------------
-         | Return address; PC (Program Counter)
-         --------------------------------------
-         | STATUS32 value
-         --------------------------------------
-         | Caller-saved registers: some of R0-R12
-         --------------------------------------
-         |...
-         |...
-
-  higher_addr, let's say: 0x2000
------------------------------>8---------------------------------
-
-So how do we return in such a complex scenario.
-
-First we restore callee-saved regs with help of _load_callee_saved_regs().
-Now we're back to PRE-CONTEXT-SWITCH STACK (see above).
-
-Logically our next step is to load return address from the top of the stack
-and jump to that address to continue execution of the desired thread, but
-we're still in interrupt handling mode and the only way to return to normal
-execution mode is to execute "rtie" instruction. And here we need to deal
-with peculiarities of return from IRQ on ARCv2 cores.
-
-Instead of simple jump to a return address stored in the tip of thread's stack
-(with subsequent interrupt enable) ARCv2 core additionally automatically
-restores some registers from stack. Most important ones are
-PC ("Program Counter") which holds address of the next instruction to execute
-and STATUS32 which holds imortant flags including global interrupt enable,
-zero, carry etc.
-
-To make things worse depending on ARC core configuration and run-time setup
-of certain features different set of registers will be restored.
-
-Typically those same registers are automatically saved on stack on entry to
-an interrupt, but remember we're returning to the thread which was
-not interrupted by interrupt and so on its stack there're no automatically
-saved registers, still inevitably on RTIE execution register restoration
-will happen. So if we do nothing special we'll end-up with that:
------------------------------>8---------------------------------
-  lower_addr, let's say: 0x1000
-
-         --------------------------------------
-    #    | Return address; PC (Program Counter)
-    |    --------------------------------------
-    |    | STATUS32 value
-    |    --------------------------------------
-    |
- sizeof(_irq_stack_frame)
-    |
-    |    | Caller-saved registers: R0-R12
-    V    --------------------------------------
-         |...
-  SP ->  | < Some data on thread's stack>
-         |...
-
-  higher_addr, let's say: 0x2000
------------------------------>8---------------------------------
-
-I.e. we'll go much deeper down the stack over needed return address, read
-some value from unexpected location in stack and will try to jump there.
-Nobody knows were we end-up then.
-
-To work-around that problem we need to mimic existance of IRQ stack frame
-of which we really only need return address obviously to return where we
-need to. For that we just shift SP so that it points sizeof(_irq_stack_frame)
-above like that:
------------------------------>8---------------------------------
-  lower_addr, let's say: 0x1000
-
-  SP ->  |
-    A    | < Some unrelated data >
-    |    |
-    |
- sizeof(_irq_stack_frame)
-    |
-    |    --------------------------------------
-    |    | Return address; PC (Program Counter)
-    |    --------------------------------------
-    #    | STATUS32 value
-         --------------------------------------
-         | Caller-saved registers: R0-R12
-         --------------------------------------
-         |...
-         | < Some data on thread's stack>
-         |...
-
-  higher_addr, let's say: 0x2000
------------------------------>8---------------------------------
-
-Indeed R0-R13 "restored" from IRQ stack frame will contain garbage but
-it makes no difference because we're returning to execution of code as if
-we're returning from yet another function call and so we will restore
-all needed registers from the stack.
-
-One other important remark here is R13.
-
-CPU hardware automatically save/restore registers in pairs and since we
-wanted to save/restore R12 in IRQ stack frame as a caller-saved register we
-just happen to do that for R13 as well. But given compiler treats it as
-a callee-saved register we save/restore it separately in _callee_saved_stack
-structure. And when we restore callee-saved registers from stack we among
-other registers recover R13. But later on return from IRQ with RTIE
-instruction, R13 will be "restored" again from fake IRQ stack frame and
-if we don't copy correct R13 value to fake IRQ stack frame R13 value
-will be corrupted.
-
-*/
 
 /**
  *
@@ -204,24 +51,26 @@ will be corrupted.
 
 SECTION_FUNC(TEXT, _rirq_enter)
 
-/* the ISR will be handled in separate interrupt stack,
- * so stack checking must be diabled, or exception will
- * be caused
- */
-	_disable_stack_checking r2
+
+#ifdef CONFIG_ARC_STACK_CHECKING
+	/* disable stack checking */
+	lr r2, [_ARC_V2_STATUS32]
+	bclr r2, r2, _ARC_V2_STATUS32_SC_BIT
+	kflag r2
+#endif
 	clri
+	ld r1, [exc_nest_count]
+	add r0, r1, 1
+	st r0, [exc_nest_count]
+	cmp r1, 0
 
-	/* check whether irq stack is used, if
-	 * not switch to isr stack
-	 */
-	_check_and_inc_int_nest_counter r0, r1
+	bgt.d  rirq_nest
+	mov r0, sp
 
-	bne.d rirq_nest
-	MOVR r0, sp
-
-	_get_curr_cpu_irq_stack sp
+	mov r1, _kernel
+	ld sp, [r1, _kernel_offset_to_irq_stack]
 rirq_nest:
-	PUSHR r0
+	push_s r0
 
 	seti
 	j _isr_demux
@@ -237,73 +86,121 @@ rirq_nest:
 SECTION_FUNC(TEXT, _rirq_exit)
 	clri
 
-	POPR sp
+	pop sp
 
-	_dec_int_nest_counter r0, r1
+	mov	r1, exc_nest_count
+	ld	r0, [r1]
+	sub	r0, r0, 1
+	cmp	r0, 0
+	bne.d	_rirq_return_from_rirq
+	st	r0, [r1]
 
-	_check_nest_int_by_irq_act r0, r1
+#ifdef CONFIG_PREEMPT_ENABLED
 
-	jne _rirq_no_switch
+	mov r1, _kernel
+	ld_s r2, [r1, _kernel_offset_to_current]
 
-	/* sp is struct k_thread **old of z_arc_switch_in_isr
-	 * which is a wrapper of z_get_next_switch_handle.
-	 * r0 contains the 1st thread in ready queue. if
-	 * it equals _current(r2) ,then do swap, or no swap.
+	/*
+	 * Lock interrupts to ensure kernel queues do not change from this
+	 * point on until return from interrupt.
 	 */
-	_get_next_switch_handle
 
-	CMPR r0, r2
-	beq _rirq_no_switch
 
-#ifdef CONFIG_ARC_SECURE_FIRMWARE
-	/* here need to remember SEC_STAT.IRM bit */
-	lr r3, [_ARC_V2_SEC_STAT]
-	push_s r3
+	/*
+	 * Non-preemptible thread ? Do not schedule (see explanation of
+	 * preempt field in kernel_struct.h).
+	 */
+	ldh_s r0, [r2, _thread_offset_to_preempt]
+	mov r3, _NON_PREEMPT_THRESHOLD
+	cmp_s r0, r3
+	bhs.d _rirq_no_reschedule
+
+	/*
+	 * Both (a)reschedule and (b)non-reschedule cases need to load the
+	 * current thread's stack, but don't have to use it until the decision
+	 * is taken: load the delay slots with the 'load stack pointer'
+	 * instruction.
+	 *
+	 * a) needs to load it to save outgoing context.
+	 * b) needs to load it to restore the interrupted context.
+	 */
+
+	/* check if the current thread needs to be rescheduled */
+	ld_s r0, [r1, _kernel_offset_to_ready_q_cache]
+	cmp_s r0, r2
+	beq _rirq_no_reschedule
+
+	/* cached thread to run is in r0, fall through */
+
+.balign 4
+_rirq_reschedule:
+
+	/* _save_callee_saved_regs expects outgoing thread in r2 */
+	_save_callee_saved_regs
+
+	st _CAUSE_RIRQ, [r2, _thread_offset_to_relinquish_cause]
+
+	/* incoming thread is in r0: it becomes the new 'current' */
+	mov r2, r0
+	st_s r2, [r1, _kernel_offset_to_current]
+
+.balign 4
+_rirq_common_interrupt_swap:
+	/* r2 contains pointer to new thread */
+
+#ifdef CONFIG_ARC_STACK_CHECKING
+	/* Use stack top and base registers from restored context */
+	ld r3, [r2, _thread_offset_to_stack_base]
+	sr r3, [_ARC_V2_KSTACK_BASE]
+	ld r3, [r2, _thread_offset_to_stack_top]
+	sr r3, [_ARC_V2_KSTACK_TOP]
+#endif
+	/*
+	 * _load_callee_saved_regs expects incoming thread in r2.
+	 * _load_callee_saved_regs restores the stack pointer.
+	 */
+	_load_callee_saved_regs
+
+#ifdef CONFIG_MPU_STACK_GUARD
+	push_s r2
+	mov r0, r2
+	bl configure_mpu_stack_guard
+	pop_s r2
 #endif
 
-	/* r2 is old thread */
-	_irq_store_old_thread_callee_regs
+	ld_s r3, [r2, _thread_offset_to_relinquish_cause]
 
-	/* _thread_arch.relinquish_cause is 32 bit despite of platform bittnes */
-	_st32_huge_offset _CAUSE_RIRQ, r2, _thread_offset_to_relinquish_cause, r2
-
-	/* mov new thread (r0) to r2 */
-	MOVR r2, r0
-
-/* _rirq_newthread_switch required by exception handling */
-.align 4
-_rirq_newthread_switch:
-
-	_load_new_thread_callee_regs
-
-	breq r3, _CAUSE_RIRQ, _rirq_switch_from_rirq
-	nop_s
-	breq r3, _CAUSE_FIRQ, _rirq_switch_from_firq
-	nop_s
+	breq r3, _CAUSE_RIRQ, _rirq_return_from_rirq
+	nop
+	breq r3, _CAUSE_FIRQ, _rirq_return_from_firq
+	nop
 
 	/* fall through */
 
-.align 4
-_rirq_switch_from_coop:
+.balign 4
+_rirq_return_from_coop:
 
-	/* for a cooperative switch, it's not in irq, so
-	 * need to set some regs for irq return
-	 */
-	_set_misc_regs_irq_switch_from_coop
+	/* status32 and pc (blink) are already on the stack in the right order */
 
-	/*
-	 * See verbose explanation of
-	 * RETURN FROM INTERRUPT TO COOPERATIVE THREAD above
-	 */
+	/* update status32.ie (explanation in firq_exit:_firq_return_from_coop) */
+	ld_s r0, [sp, 4]
+	ld_s r3, [r2, _thread_offset_to_intlock_key]
+	st  0, [r2, _thread_offset_to_intlock_key]
+	cmp r3, 0
+	or.ne r0, r0, _ARC_V2_STATUS32_IE
+	st_s r0, [sp, 4]
 
 	/* carve fake stack */
-	SUBR sp, sp, ___isf_t_pc_OFFSET
 
+	/*
+	 * a) status32/pc are already on the stack
+	 * b) a real value will be pushed in r0
+	 */
+	sub sp, sp, (___isf_t_SIZEOF - 12)
 
-#ifdef CONFIG_ARC_HAS_ZOL
-	/* reset zero-overhead loops */
-	STR 0, sp, ___isf_t_lp_end_OFFSET
-#endif /* CONFIG_ARC_HAS_ZOL */
+	/* push return value on stack */
+	ld_s r0, [r2, _thread_offset_to_return_value]
+	push_s r0
 
 	/*
 	 * r13 is part of both the callee and caller-saved register sets because
@@ -311,31 +208,21 @@ _rirq_switch_from_coop:
 	 * IRQ prologue. r13 thus has to be set to its correct value in the IRQ
 	 * stack frame.
 	 */
-	STR r13, sp, ___isf_t_r13_OFFSET
+	st_s r13, [sp, ___isf_t_r13_OFFSET]
 
-#ifdef CONFIG_INSTRUMENT_THREAD_SWITCHING
-	PUSHR blink
+	/* stack now has the IRQ stack frame layout, pointing to r0 */
 
-	bl z_thread_mark_switched_in
+	/* fall through to rtie instruction */
 
-	POPR blink
-#endif
-	/* stack now has the IRQ stack frame layout, pointing to sp */
 	/* rtie will pop the rest from the stack */
-	rtie
-
-.align 4
-_rirq_switch_from_firq:
-_rirq_switch_from_rirq:
-
-	_set_misc_regs_irq_switch_from_irq
-
-#ifdef CONFIG_INSTRUMENT_THREAD_SWITCHING
-	PUSHR blink
-
-	bl z_thread_mark_switched_in
-
-	POPR blink
-#endif
-_rirq_no_switch:
+
+	/* fall through to rtie instruction */
+
+#endif /* CONFIG_PREEMPT_ENABLED */
+
+.balign 4
+_rirq_return_from_firq:
+_rirq_return_from_rirq:
+_rirq_no_reschedule:
+
 	rtie