Release 4.11 arch/arm/include/asm/thread_info.h
/*
* arch/arm/include/asm/thread_info.h
*
* Copyright (C) 2002 Russell King.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#ifndef __ASM_ARM_THREAD_INFO_H
#define __ASM_ARM_THREAD_INFO_H
#ifdef __KERNEL__
#include <linux/compiler.h>
#include <asm/fpstate.h>
#include <asm/page.h>
#define THREAD_SIZE_ORDER 1
#define THREAD_SIZE (PAGE_SIZE << THREAD_SIZE_ORDER)
#define THREAD_START_SP (THREAD_SIZE - 8)
#ifndef __ASSEMBLY__
struct task_struct;
#include <asm/types.h>
typedef unsigned long mm_segment_t;
struct cpu_context_save {
__u32 r4;
__u32 r5;
__u32 r6;
__u32 r7;
__u32 r8;
__u32 r9;
__u32 sl;
__u32 fp;
__u32 sp;
__u32 pc;
__u32 extra[2]; /* Xscale 'acc' register, etc */
};
/*
* low level task data that entry.S needs immediate access to.
* __switch_to() assumes cpu_context follows immediately after cpu_domain.
*/
struct thread_info {
unsigned long flags; /* low level flags */
int preempt_count; /* 0 => preemptable, <0 => bug */
mm_segment_t addr_limit; /* address limit */
struct task_struct *task; /* main task structure */
__u32 cpu; /* cpu */
__u32 cpu_domain; /* cpu domain */
struct cpu_context_save cpu_context; /* cpu context */
__u32 syscall; /* syscall number */
__u8 used_cp[16]; /* thread used copro */
unsigned long tp_value[2]; /* TLS registers */
#ifdef CONFIG_CRUNCH
struct crunch_state crunchstate;
#endif
union fp_state fpstate __attribute__((aligned(8)));
union vfp_state vfpstate;
#ifdef CONFIG_ARM_THUMBEE
unsigned long thumbee_state; /* ThumbEE Handler Base register */
#endif
};
#define INIT_THREAD_INFO(tsk) \
{ \
.task = &tsk, \
.flags = 0, \
.preempt_count = INIT_PREEMPT_COUNT, \
.addr_limit = KERNEL_DS, \
}
#define init_thread_info (init_thread_union.thread_info)
#define init_stack (init_thread_union.stack)
/*
* how to get the current stack pointer in C
*/
register unsigned long current_stack_pointer asm ("sp");
/*
* how to get the thread information struct from C
*/
static inline struct thread_info *current_thread_info(void) __attribute_const__;
static inline struct thread_info *current_thread_info(void)
{
return (struct thread_info *)
(current_stack_pointer & ~(THREAD_SIZE - 1));
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Russell King | 27 | 96.43% | 2 | 66.67% |
| Behan Webster | 1 | 3.57% | 1 | 33.33% |
| Total | 28 | 100.00% | 3 | 100.00% |
#define thread_saved_pc(tsk) \
((unsigned long)(task_thread_info(tsk)->cpu_context.pc))
#define thread_saved_sp(tsk) \
((unsigned long)(task_thread_info(tsk)->cpu_context.sp))
#ifndef CONFIG_THUMB2_KERNEL
#define thread_saved_fp(tsk) \
((unsigned long)(task_thread_info(tsk)->cpu_context.fp))
#else
#define thread_saved_fp(tsk) \
((unsigned long)(task_thread_info(tsk)->cpu_context.r7))
#endif
extern void crunch_task_disable(struct thread_info *);
extern void crunch_task_copy(struct thread_info *, void *);
extern void crunch_task_restore(struct thread_info *, void *);
extern void crunch_task_release(struct thread_info *);
extern void iwmmxt_task_disable(struct thread_info *);
extern void iwmmxt_task_copy(struct thread_info *, void *);
extern void iwmmxt_task_restore(struct thread_info *, void *);
extern void iwmmxt_task_release(struct thread_info *);
extern void iwmmxt_task_switch(struct thread_info *);
extern void vfp_sync_hwstate(struct thread_info *);
extern void vfp_flush_hwstate(struct thread_info *);
struct user_vfp;
struct user_vfp_exc;
extern int vfp_preserve_user_clear_hwstate(struct user_vfp __user *,
struct user_vfp_exc __user *);
extern int vfp_restore_user_hwstate(struct user_vfp __user *,
struct user_vfp_exc __user *);
#endif
/*
* thread information flags:
* TIF_USEDFPU - FPU was used by this task this quantum (SMP)
* TIF_POLLING_NRFLAG - true if poll_idle() is polling TIF_NEED_RESCHED
*/
#define TIF_SIGPENDING 0
/* signal pending */
#define TIF_NEED_RESCHED 1
/* rescheduling necessary */
#define TIF_NOTIFY_RESUME 2
/* callback before returning to user */
#define TIF_UPROBE 3
/* breakpointed or singlestepping */
#define TIF_SYSCALL_TRACE 4
/* syscall trace active */
#define TIF_SYSCALL_AUDIT 5
/* syscall auditing active */
#define TIF_SYSCALL_TRACEPOINT 6
/* syscall tracepoint instrumentation */
#define TIF_SECCOMP 7
/* seccomp syscall filtering active */
#define TIF_NOHZ 12
/* in adaptive nohz mode */
#define TIF_USING_IWMMXT 17
#define TIF_MEMDIE 18
/* is terminating due to OOM killer */
#define TIF_RESTORE_SIGMASK 20
#define _TIF_SIGPENDING (1 << TIF_SIGPENDING)
#define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED)
#define _TIF_NOTIFY_RESUME (1 << TIF_NOTIFY_RESUME)
#define _TIF_UPROBE (1 << TIF_UPROBE)
#define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE)
#define _TIF_SYSCALL_AUDIT (1 << TIF_SYSCALL_AUDIT)
#define _TIF_SYSCALL_TRACEPOINT (1 << TIF_SYSCALL_TRACEPOINT)
#define _TIF_SECCOMP (1 << TIF_SECCOMP)
#define _TIF_USING_IWMMXT (1 << TIF_USING_IWMMXT)
/* Checks for any syscall work in entry-common.S */
#define _TIF_SYSCALL_WORK (_TIF_SYSCALL_TRACE | _TIF_SYSCALL_AUDIT | \
_TIF_SYSCALL_TRACEPOINT | _TIF_SECCOMP)
/*
* Change these and you break ASM code in entry-common.S
*/
#define _TIF_WORK_MASK (_TIF_NEED_RESCHED | _TIF_SIGPENDING | \
_TIF_NOTIFY_RESUME | _TIF_UPROBE)
#endif /* __KERNEL__ */
#endif /* __ASM_ARM_THREAD_INFO_H */
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Russell King | 274 | 50.28% | 20 | 42.55% |
| Lennert Buytenhek | 55 | 10.09% | 2 | 4.26% |
| Nico Pitre | 52 | 9.54% | 3 | 6.38% |
| Will Deacon | 35 | 6.42% | 1 | 2.13% |
| Catalin Marinas | 27 | 4.95% | 3 | 6.38% |
| Nikolay Borisov | 15 | 2.75% | 1 | 2.13% |
| Nathaniel Husted | 11 | 2.02% | 1 | 2.13% |
| Behan Webster | 11 | 2.02% | 2 | 4.26% |
| David Howells | 9 | 1.65% | 1 | 2.13% |
| Kees Cook | 9 | 1.65% | 1 | 2.13% |
| David A. Long | 8 | 1.47% | 1 | 2.13% |
| Wade Farnsworth | 7 | 1.28% | 1 | 2.13% |
| Mikael Pettersson | 6 | 1.10% | 1 | 2.13% |
| Kevin Hilman | 5 | 0.92% | 1 | 2.13% |
| André Hentschel | 4 | 0.73% | 1 | 2.13% |
| Andrew Morton | 4 | 0.73% | 1 | 2.13% |
| Andrey Ryabinin | 4 | 0.73% | 1 | 2.13% |
| Andrea Arcangeli | 4 | 0.73% | 1 | 2.13% |
| Stéphane Eranian | 2 | 0.37% | 1 | 2.13% |
| Jesper Juhl | 1 | 0.18% | 1 | 2.13% |
| Andreas Dilger | 1 | 0.18% | 1 | 2.13% |
| Al Viro | 1 | 0.18% | 1 | 2.13% |
| Total | 545 | 100.00% | 47 | 100.00% |
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