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https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
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9cc646950e
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 on the __ASSEMBLER__ macro that is provided by the compilers now. This is a completely mechanical patch (done with a simple "sed -i" statement). Cc: Yoshinori Sato <ysato@users.sourceforge.jp> Cc: Rich Felker <dalias@libc.org> Cc: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de> Cc: linux-sh@vger.kernel.org Signed-off-by: Thomas Huth <thuth@redhat.com> Reviewed-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de> Signed-off-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
169 lines
5.0 KiB
C
169 lines
5.0 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __ASM_SH_THREAD_INFO_H
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#define __ASM_SH_THREAD_INFO_H
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/* SuperH version
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* Copyright (C) 2002 Niibe Yutaka
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*
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* The copyright of original i386 version is:
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*
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* Copyright (C) 2002 David Howells (dhowells@redhat.com)
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* - Incorporating suggestions made by Linus Torvalds and Dave Miller
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*/
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#include <asm/page.h>
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/*
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* Page fault error code bits
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*/
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#define FAULT_CODE_WRITE (1 << 0) /* write access */
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#define FAULT_CODE_INITIAL (1 << 1) /* initial page write */
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#define FAULT_CODE_ITLB (1 << 2) /* ITLB miss */
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#define FAULT_CODE_PROT (1 << 3) /* protection fault */
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#define FAULT_CODE_USER (1 << 4) /* user-mode access */
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#ifndef __ASSEMBLER__
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#include <asm/processor.h>
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struct thread_info {
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struct task_struct *task; /* main task structure */
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unsigned long flags; /* low level flags */
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__u32 status; /* thread synchronous flags */
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__u32 cpu;
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int preempt_count; /* 0 => preemptable, <0 => BUG */
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unsigned long previous_sp; /* sp of previous stack in case
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of nested IRQ stacks */
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__u8 supervisor_stack[];
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};
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#endif
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#if defined(CONFIG_4KSTACKS)
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#define THREAD_SHIFT 12
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#else
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#define THREAD_SHIFT 13
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#endif
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#define THREAD_SIZE (1 << THREAD_SHIFT)
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#define STACK_WARN (THREAD_SIZE >> 3)
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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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#ifndef __ASSEMBLER__
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#define INIT_THREAD_INFO(tsk) \
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{ \
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.task = &tsk, \
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.flags = 0, \
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.status = 0, \
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.cpu = 0, \
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.preempt_count = INIT_PREEMPT_COUNT, \
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}
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/* how to get the current stack pointer from C */
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register unsigned long current_stack_pointer asm("r15") __used;
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/* how to get the thread information struct from C */
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static inline struct thread_info *current_thread_info(void)
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{
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struct thread_info *ti;
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#if defined(CONFIG_CPU_HAS_SR_RB)
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__asm__ __volatile__ ("stc r7_bank, %0" : "=r" (ti));
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#else
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unsigned long __dummy;
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__asm__ __volatile__ (
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"mov r15, %0\n\t"
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"and %1, %0\n\t"
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: "=&r" (ti), "=r" (__dummy)
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: "1" (~(THREAD_SIZE - 1))
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: "memory");
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#endif
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return ti;
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}
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#define THREAD_SIZE_ORDER (THREAD_SHIFT - PAGE_SHIFT)
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extern void init_thread_xstate(void);
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#endif /* __ASSEMBLER__ */
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/*
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* Thread information flags
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*
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* - Limited to 24 bits, upper byte used for fault code encoding.
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*
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* - _TIF_ALLWORK_MASK and _TIF_WORK_MASK need to fit within 2 bytes, or
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* we blow the tst immediate size constraints and need to fix up
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* arch/sh/kernel/entry-common.S.
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*/
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#define TIF_SYSCALL_TRACE 0 /* syscall trace active */
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#define TIF_SIGPENDING 1 /* signal pending */
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#define TIF_NEED_RESCHED 2 /* rescheduling necessary */
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#define TIF_NOTIFY_SIGNAL 3 /* signal notifications exist */
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#define TIF_SINGLESTEP 4 /* singlestepping active */
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#define TIF_SYSCALL_AUDIT 5 /* syscall auditing active */
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#define TIF_SECCOMP 6 /* secure computing */
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#define TIF_NOTIFY_RESUME 7 /* callback before returning to user */
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#define TIF_SYSCALL_TRACEPOINT 8 /* for ftrace syscall instrumentation */
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#define TIF_POLLING_NRFLAG 17 /* true if poll_idle() is polling TIF_NEED_RESCHED */
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#define TIF_MEMDIE 18 /* is terminating due to OOM killer */
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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_SIGNAL (1 << TIF_NOTIFY_SIGNAL)
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#define _TIF_SINGLESTEP (1 << TIF_SINGLESTEP)
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#define _TIF_SYSCALL_AUDIT (1 << TIF_SYSCALL_AUDIT)
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#define _TIF_SECCOMP (1 << TIF_SECCOMP)
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#define _TIF_NOTIFY_RESUME (1 << TIF_NOTIFY_RESUME)
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#define _TIF_SYSCALL_TRACEPOINT (1 << TIF_SYSCALL_TRACEPOINT)
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#define _TIF_POLLING_NRFLAG (1 << TIF_POLLING_NRFLAG)
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/* work to do in syscall trace */
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#define _TIF_WORK_SYSCALL_MASK (_TIF_SYSCALL_TRACE | _TIF_SINGLESTEP | \
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_TIF_SYSCALL_AUDIT | _TIF_SECCOMP | \
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_TIF_SYSCALL_TRACEPOINT)
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/* work to do on any return to u-space */
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#define _TIF_ALLWORK_MASK (_TIF_SYSCALL_TRACE | _TIF_SIGPENDING | \
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_TIF_NEED_RESCHED | _TIF_SYSCALL_AUDIT | \
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_TIF_SINGLESTEP | _TIF_NOTIFY_RESUME | \
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_TIF_SYSCALL_TRACEPOINT | _TIF_NOTIFY_SIGNAL)
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/* work to do on interrupt/exception return */
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#define _TIF_WORK_MASK (_TIF_ALLWORK_MASK & ~(_TIF_SYSCALL_TRACE | \
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_TIF_SYSCALL_AUDIT | _TIF_SINGLESTEP))
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/*
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* Thread-synchronous status.
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*
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* This is different from the flags in that nobody else
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* ever touches our thread-synchronous status, so we don't
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* have to worry about atomic accesses.
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*/
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#define TS_USEDFPU 0x0002 /* FPU used by this task this quantum */
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#ifndef __ASSEMBLER__
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#define TI_FLAG_FAULT_CODE_SHIFT 24
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/*
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* Additional thread flag encoding
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*/
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static inline void set_thread_fault_code(unsigned int val)
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{
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struct thread_info *ti = current_thread_info();
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ti->flags = (ti->flags & (~0 >> (32 - TI_FLAG_FAULT_CODE_SHIFT)))
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| (val << TI_FLAG_FAULT_CODE_SHIFT);
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}
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static inline unsigned int get_thread_fault_code(void)
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{
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struct thread_info *ti = current_thread_info();
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return ti->flags >> TI_FLAG_FAULT_CODE_SHIFT;
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}
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#endif /* !__ASSEMBLER__ */
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#endif /* __ASM_SH_THREAD_INFO_H */
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