soc/sifive/sifive_freedom: add SiFive Freedom U540 SoC

This commit adds support for the SiFive Freedom U540 SoC for the Zephyr
Hardware Model v2.

Signed-off-by: Filip Kokosinski <fkokosinski@antmicro.com>

soc/sifive/sifive_freedom/fu500/CMakeLists.txt

@@ -1,5 +1,6 @@
 # SPDX-License-Identifier: Apache-2.0
 
 zephyr_sources(clock.c)
+zephyr_include_directories(.)
 
 set(SOC_LINKER_SCRIPT ${ZEPHYR_BASE}/include/zephyr/arch/riscv/common/linker.ld CACHE INTERNAL "")

soc/sifive/sifive_freedom/fu500/Kconfig

@@ -1,17 +1,14 @@
-# RISCV_SIFIVE_FREEDOM SOC configuration options
-
 # Copyright (c) 2017 Jean-Paul Etienne <fractalclone@gmail.com>
+# Copyright (c) 2024 Antmicro <www.antmicro.com>
 # SPDX-License-Identifier: Apache-2.0
 
-choice
-	prompt "SiFive Freedom SOC implementation"
-	depends on SOC_SERIES_SIFIVE_FREEDOM_U500
+config SOC_SERIES_SIFIVE_FREEDOM_FU500
+	bool
 
-config SOC_SIFIVE_FREEDOM_U540
-	bool "SiFive Freedom U540 SOC implementation"
-	select ATOMIC_OPERATIONS_C
-	select INCLUDE_RESET_VECTOR
-	select 64BIT
+	# RISC-V options
+	select RISCV
+	select RISCV_PRIVILEGED
+	select RISCV_HAS_PLIC
 	select RISCV_ISA_RV64I
 	select RISCV_ISA_EXT_M
 	select RISCV_ISA_EXT_A
@@ -19,4 +16,5 @@ config SOC_SIFIVE_FREEDOM_U540
 	select RISCV_ISA_EXT_ZICSR
 	select RISCV_ISA_EXT_ZIFENCEI
 
-endchoice
+	select 64BIT
+	select INCLUDE_RESET_VECTOR

soc/sifive/sifive_freedom/fu500/Kconfig.defconfig

@@ -1,10 +1,8 @@
 # Copyright (c) 2017 Jean-Paul Etienne <fractalclone@gmail.com>
+# Copyright (c) 2024 Antmicro <www.antmicro.com>
 # SPDX-License-Identifier: Apache-2.0
 
-if SOC_SERIES_SIFIVE_FREEDOM_U500
-
-config SOC_SERIES
-	default "u500"
+if SOC_SERIES_SIFIVE_FREEDOM_FU500
 
 config SYS_CLOCK_HW_CYCLES_PER_SEC
 	default 32768
@@ -27,6 +25,4 @@ config MAX_IRQ_PER_AGGREGATOR
 config NUM_IRQS
 	default 64
 
-source "soc/soc_legacy/riscv/sifive_freedom/u500/Kconfig.defconfig.u*"
-
-endif # SOC_SERIES_SIFIVE_FREEDOM_U500
+endif # SOC_SERIES_SIFIVE_FREEDOM_FU500

soc/sifive/sifive_freedom/fu500/Kconfig.soc

@@ -0,0 +1,16 @@
+# Copyright (c) 2024 Antmicro <www.antmicro.com>
+# SPDX-License-Identifier: Apache-2.0
+
+config SOC_SERIES_SIFIVE_FREEDOM_FU500
+	bool
+	select SOC_FAMILY_SIFIVE_FREEDOM
+
+config SOC_SERIES
+	default "fu500" if SOC_SERIES_SIFIVE_FREEDOM_FU500
+
+config SOC_SIFIVE_FREEDOM_FU540
+	bool
+	select SOC_SERIES_SIFIVE_FREEDOM_FU500
+
+config SOC
+	default "fu540" if SOC_SIFIVE_FREEDOM_FU540

soc/sifive/sifive_freedom/soc.yml

@@ -4,3 +4,6 @@ family:
       - name: fe300
         socs:
           - name: fe310
+      - name: fu500
+        socs:
+          - name: fu540

soc/soc_legacy/riscv/sifive_freedom/u500/Kconfig.defconfig.u540

@@ -1,5 +0,0 @@
-# Copyright (c) 2017 Jean-Paul Etienne <fractalclone@gmail.com>
-# SPDX-License-Identifier: Apache-2.0
-
-config SOC
-	default "u540" if SOC_SIFIVE_FREEDOM_U540

soc/soc_legacy/riscv/sifive_freedom/u500/Kconfig.series

@@ -1,13 +0,0 @@
-# RISCV_SIFIVE_FREEDOM SOC implementation
-
-# Copyright (c) 2017 Jean-Paul Etienne <fractalclone@gmail.com>
-# SPDX-License-Identifier: Apache-2.0
-
-config SOC_SERIES_SIFIVE_FREEDOM_U500
-	bool "SiFive Freedom U500 SOC implementation"
-	select RISCV
-	select RISCV_PRIVILEGED
-	select RISCV_HAS_PLIC
-	select SOC_FAMILY_SIFIVE_FREEDOM
-	help
-	  Enable support for SiFive Freedom U500 SOC