3cec82b4fc
While the GCC and Clang compilers already define __ASSEMBLER__ automatically when compiling assembly code, __ASSEMBLY__ is a macro that only gets defined by the Makefiles in the kernel. This can be very confusing when switching between userspace and kernelspace coding, or when dealing with uapi headers that rather should use __ASSEMBLER__ instead. So let's standardize now on the __ASSEMBLER__ macro that is provided by the compilers. This is a completely mechanical patch (done with a simple "sed -i" statement). Cc: Richard Henderson <richard.henderson@linaro.org> Cc: Matt Turner <mattst88@gmail.com> Cc: linux-alpha@vger.kernel.org Signed-off-by: Thomas Huth <thuth@redhat.com> Reviewed-by: Magnus Lindholm <linmag7@gmail.com> Link: https://lore.kernel.org/r/20251121100044.282684-2-thuth@redhat.com Signed-off-by: Magnus Lindholm <linmag7@gmail.com>
127 lines
3.8 KiB
C
127 lines
3.8 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _ALPHA_THREAD_INFO_H
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#define _ALPHA_THREAD_INFO_H
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#ifdef __KERNEL__
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#ifndef __ASSEMBLER__
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#include <asm/processor.h>
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#include <asm/types.h>
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#include <asm/hwrpb.h>
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#include <asm/sysinfo.h>
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#endif
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#ifndef __ASSEMBLER__
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struct thread_info {
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struct pcb_struct pcb; /* palcode state */
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struct task_struct *task; /* main task structure */
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unsigned int flags; /* low level flags */
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unsigned int ieee_state; /* see fpu.h */
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unsigned cpu; /* current CPU */
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int preempt_count; /* 0 => preemptable, <0 => BUG */
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unsigned int status; /* thread-synchronous flags */
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int bpt_nsaved;
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unsigned long bpt_addr[2]; /* breakpoint handling */
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unsigned int bpt_insn[2];
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unsigned long fp[32];
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};
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/*
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* Macros/functions for gaining access to the thread information structure.
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*/
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#define INIT_THREAD_INFO(tsk) \
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{ \
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.task = &tsk, \
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.preempt_count = INIT_PREEMPT_COUNT, \
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}
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/* How to get the thread information struct from C. */
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register struct thread_info *__current_thread_info __asm__("$8");
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#define current_thread_info() __current_thread_info
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register unsigned long *current_stack_pointer __asm__ ("$30");
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#endif /* __ASSEMBLER__ */
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/* Thread information allocation. */
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#define THREAD_SIZE_ORDER 1
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#define THREAD_SIZE (2*PAGE_SIZE)
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/*
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* Thread information flags:
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* - these are process state flags and used from assembly
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* - pending work-to-be-done flags come first and must be assigned to be
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* within bits 0 to 7 to fit in and immediate operand.
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*
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* TIF_SYSCALL_TRACE is known to be 0 via blbs.
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*/
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#define TIF_SYSCALL_TRACE 0 /* syscall trace active */
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#define TIF_NOTIFY_RESUME 1 /* callback before returning to user */
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#define TIF_SIGPENDING 2 /* signal pending */
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#define TIF_NEED_RESCHED 3 /* rescheduling necessary */
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#define TIF_SYSCALL_AUDIT 4 /* syscall audit active */
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#define TIF_NOTIFY_SIGNAL 5 /* signal notifications exist */
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#define TIF_DIE_IF_KERNEL 9 /* dik recursion lock */
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#define TIF_MEMDIE 13 /* is terminating due to OOM killer */
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#define TIF_POLLING_NRFLAG 14 /* idle is polling for TIF_NEED_RESCHED */
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#define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE)
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#define _TIF_SIGPENDING (1<<TIF_SIGPENDING)
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#define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED)
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#define _TIF_NOTIFY_RESUME (1<<TIF_NOTIFY_RESUME)
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#define _TIF_SYSCALL_AUDIT (1<<TIF_SYSCALL_AUDIT)
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#define _TIF_NOTIFY_SIGNAL (1<<TIF_NOTIFY_SIGNAL)
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#define _TIF_POLLING_NRFLAG (1<<TIF_POLLING_NRFLAG)
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/* Work to do on interrupt/exception return. */
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#define _TIF_WORK_MASK (_TIF_SIGPENDING | _TIF_NEED_RESCHED | \
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_TIF_NOTIFY_RESUME | _TIF_NOTIFY_SIGNAL)
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#define TS_UAC_NOPRINT 0x0001 /* ! Preserve the following three */
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#define TS_UAC_NOFIX 0x0002 /* ! flags as they match */
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#define TS_UAC_SIGBUS 0x0004 /* ! userspace part of 'osf_sysinfo' */
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#define TS_SAVED_FP 0x0008
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#define TS_RESTORE_FP 0x0010
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#define SET_UNALIGN_CTL(task,value) ({ \
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__u32 status = task_thread_info(task)->status & ~UAC_BITMASK; \
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if (value & PR_UNALIGN_NOPRINT) \
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status |= TS_UAC_NOPRINT; \
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if (value & PR_UNALIGN_SIGBUS) \
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status |= TS_UAC_SIGBUS; \
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if (value & 4) /* alpha-specific */ \
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status |= TS_UAC_NOFIX; \
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task_thread_info(task)->status = status; \
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0; })
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#define GET_UNALIGN_CTL(task,value) ({ \
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__u32 status = task_thread_info(task)->status & ~UAC_BITMASK; \
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__u32 res = 0; \
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if (status & TS_UAC_NOPRINT) \
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res |= PR_UNALIGN_NOPRINT; \
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if (status & TS_UAC_SIGBUS) \
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res |= PR_UNALIGN_SIGBUS; \
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if (status & TS_UAC_NOFIX) \
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res |= 4; \
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put_user(res, (int __user *)(value)); \
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})
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#ifndef __ASSEMBLER__
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extern void __save_fpu(void);
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static inline void save_fpu(void)
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{
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if (!(current_thread_info()->status & TS_SAVED_FP)) {
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current_thread_info()->status |= TS_SAVED_FP;
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__save_fpu();
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}
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}
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#endif
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#endif /* __KERNEL__ */
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#endif /* _ALPHA_THREAD_INFO_H */
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