217 строки
6.3 KiB
C
217 строки
6.3 KiB
C
#ifndef __ASM_SH_THREAD_INFO_H
|
|
#define __ASM_SH_THREAD_INFO_H
|
|
|
|
/* SuperH version
|
|
* Copyright (C) 2002 Niibe Yutaka
|
|
*
|
|
* The copyright of original i386 version is:
|
|
*
|
|
* Copyright (C) 2002 David Howells (dhowells@redhat.com)
|
|
* - Incorporating suggestions made by Linus Torvalds and Dave Miller
|
|
*/
|
|
#ifdef __KERNEL__
|
|
|
|
#include <asm/page.h>
|
|
|
|
/*
|
|
* Page fault error code bits
|
|
*/
|
|
#define FAULT_CODE_WRITE (1 << 0) /* write access */
|
|
#define FAULT_CODE_INITIAL (1 << 1) /* initial page write */
|
|
#define FAULT_CODE_ITLB (1 << 2) /* ITLB miss */
|
|
#define FAULT_CODE_PROT (1 << 3) /* protection fault */
|
|
#define FAULT_CODE_USER (1 << 4) /* user-mode access */
|
|
|
|
#ifndef __ASSEMBLY__
|
|
#include <asm/processor.h>
|
|
|
|
struct thread_info {
|
|
struct task_struct *task; /* main task structure */
|
|
struct exec_domain *exec_domain; /* execution domain */
|
|
unsigned long flags; /* low level flags */
|
|
__u32 status; /* thread synchronous flags */
|
|
__u32 cpu;
|
|
int preempt_count; /* 0 => preemptable, <0 => BUG */
|
|
mm_segment_t addr_limit; /* thread address space */
|
|
struct restart_block restart_block;
|
|
unsigned long previous_sp; /* sp of previous stack in case
|
|
of nested IRQ stacks */
|
|
__u8 supervisor_stack[0];
|
|
};
|
|
|
|
#endif
|
|
|
|
#define PREEMPT_ACTIVE 0x10000000
|
|
|
|
#if defined(CONFIG_4KSTACKS)
|
|
#define THREAD_SHIFT 12
|
|
#else
|
|
#define THREAD_SHIFT 13
|
|
#endif
|
|
|
|
#define THREAD_SIZE (1 << THREAD_SHIFT)
|
|
#define STACK_WARN (THREAD_SIZE >> 3)
|
|
|
|
/*
|
|
* macros/functions for gaining access to the thread information structure
|
|
*/
|
|
#ifndef __ASSEMBLY__
|
|
#define INIT_THREAD_INFO(tsk) \
|
|
{ \
|
|
.task = &tsk, \
|
|
.exec_domain = &default_exec_domain, \
|
|
.flags = 0, \
|
|
.status = 0, \
|
|
.cpu = 0, \
|
|
.preempt_count = INIT_PREEMPT_COUNT, \
|
|
.addr_limit = KERNEL_DS, \
|
|
.restart_block = { \
|
|
.fn = do_no_restart_syscall, \
|
|
}, \
|
|
}
|
|
|
|
#define init_thread_info (init_thread_union.thread_info)
|
|
#define init_stack (init_thread_union.stack)
|
|
|
|
/* how to get the current stack pointer from C */
|
|
register unsigned long current_stack_pointer asm("r15") __used;
|
|
|
|
/* how to get the thread information struct from C */
|
|
static inline struct thread_info *current_thread_info(void)
|
|
{
|
|
struct thread_info *ti;
|
|
#if defined(CONFIG_SUPERH64)
|
|
__asm__ __volatile__ ("getcon cr17, %0" : "=r" (ti));
|
|
#elif defined(CONFIG_CPU_HAS_SR_RB)
|
|
__asm__ __volatile__ ("stc r7_bank, %0" : "=r" (ti));
|
|
#else
|
|
unsigned long __dummy;
|
|
|
|
__asm__ __volatile__ (
|
|
"mov r15, %0\n\t"
|
|
"and %1, %0\n\t"
|
|
: "=&r" (ti), "=r" (__dummy)
|
|
: "1" (~(THREAD_SIZE - 1))
|
|
: "memory");
|
|
#endif
|
|
|
|
return ti;
|
|
}
|
|
|
|
#define THREAD_SIZE_ORDER (THREAD_SHIFT - PAGE_SHIFT)
|
|
|
|
extern void arch_task_cache_init(void);
|
|
extern int arch_dup_task_struct(struct task_struct *dst, struct task_struct *src);
|
|
extern void arch_release_task_struct(struct task_struct *tsk);
|
|
extern void init_thread_xstate(void);
|
|
|
|
#endif /* __ASSEMBLY__ */
|
|
|
|
/*
|
|
* Thread information flags
|
|
*
|
|
* - Limited to 24 bits, upper byte used for fault code encoding.
|
|
*
|
|
* - _TIF_ALLWORK_MASK and _TIF_WORK_MASK need to fit within 2 bytes, or
|
|
* we blow the tst immediate size constraints and need to fix up
|
|
* arch/sh/kernel/entry-common.S.
|
|
*/
|
|
#define TIF_SYSCALL_TRACE 0 /* syscall trace active */
|
|
#define TIF_SIGPENDING 1 /* signal pending */
|
|
#define TIF_NEED_RESCHED 2 /* rescheduling necessary */
|
|
#define TIF_SINGLESTEP 4 /* singlestepping active */
|
|
#define TIF_SYSCALL_AUDIT 5 /* syscall auditing active */
|
|
#define TIF_SECCOMP 6 /* secure computing */
|
|
#define TIF_NOTIFY_RESUME 7 /* callback before returning to user */
|
|
#define TIF_SYSCALL_TRACEPOINT 8 /* for ftrace syscall instrumentation */
|
|
#define TIF_POLLING_NRFLAG 17 /* true if poll_idle() is polling TIF_NEED_RESCHED */
|
|
#define TIF_MEMDIE 18 /* is terminating due to OOM killer */
|
|
|
|
#define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE)
|
|
#define _TIF_SIGPENDING (1 << TIF_SIGPENDING)
|
|
#define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED)
|
|
#define _TIF_SINGLESTEP (1 << TIF_SINGLESTEP)
|
|
#define _TIF_SYSCALL_AUDIT (1 << TIF_SYSCALL_AUDIT)
|
|
#define _TIF_SECCOMP (1 << TIF_SECCOMP)
|
|
#define _TIF_NOTIFY_RESUME (1 << TIF_NOTIFY_RESUME)
|
|
#define _TIF_SYSCALL_TRACEPOINT (1 << TIF_SYSCALL_TRACEPOINT)
|
|
#define _TIF_POLLING_NRFLAG (1 << TIF_POLLING_NRFLAG)
|
|
|
|
/* work to do in syscall trace */
|
|
#define _TIF_WORK_SYSCALL_MASK (_TIF_SYSCALL_TRACE | _TIF_SINGLESTEP | \
|
|
_TIF_SYSCALL_AUDIT | _TIF_SECCOMP | \
|
|
_TIF_SYSCALL_TRACEPOINT)
|
|
|
|
/* work to do on any return to u-space */
|
|
#define _TIF_ALLWORK_MASK (_TIF_SYSCALL_TRACE | _TIF_SIGPENDING | \
|
|
_TIF_NEED_RESCHED | _TIF_SYSCALL_AUDIT | \
|
|
_TIF_SINGLESTEP | _TIF_NOTIFY_RESUME | \
|
|
_TIF_SYSCALL_TRACEPOINT)
|
|
|
|
/* work to do on interrupt/exception return */
|
|
#define _TIF_WORK_MASK (_TIF_ALLWORK_MASK & ~(_TIF_SYSCALL_TRACE | \
|
|
_TIF_SYSCALL_AUDIT | _TIF_SINGLESTEP))
|
|
|
|
/*
|
|
* Thread-synchronous status.
|
|
*
|
|
* This is different from the flags in that nobody else
|
|
* ever touches our thread-synchronous status, so we don't
|
|
* have to worry about atomic accesses.
|
|
*/
|
|
#define TS_RESTORE_SIGMASK 0x0001 /* restore signal mask in do_signal() */
|
|
#define TS_USEDFPU 0x0002 /* FPU used by this task this quantum */
|
|
|
|
#ifndef __ASSEMBLY__
|
|
|
|
#define HAVE_SET_RESTORE_SIGMASK 1
|
|
static inline void set_restore_sigmask(void)
|
|
{
|
|
struct thread_info *ti = current_thread_info();
|
|
ti->status |= TS_RESTORE_SIGMASK;
|
|
WARN_ON(!test_bit(TIF_SIGPENDING, (unsigned long *)&ti->flags));
|
|
}
|
|
|
|
#define TI_FLAG_FAULT_CODE_SHIFT 24
|
|
|
|
/*
|
|
* Additional thread flag encoding
|
|
*/
|
|
static inline void set_thread_fault_code(unsigned int val)
|
|
{
|
|
struct thread_info *ti = current_thread_info();
|
|
ti->flags = (ti->flags & (~0 >> (32 - TI_FLAG_FAULT_CODE_SHIFT)))
|
|
| (val << TI_FLAG_FAULT_CODE_SHIFT);
|
|
}
|
|
|
|
static inline unsigned int get_thread_fault_code(void)
|
|
{
|
|
struct thread_info *ti = current_thread_info();
|
|
return ti->flags >> TI_FLAG_FAULT_CODE_SHIFT;
|
|
}
|
|
|
|
static inline void clear_restore_sigmask(void)
|
|
{
|
|
current_thread_info()->status &= ~TS_RESTORE_SIGMASK;
|
|
}
|
|
static inline bool test_restore_sigmask(void)
|
|
{
|
|
return current_thread_info()->status & TS_RESTORE_SIGMASK;
|
|
}
|
|
static inline bool test_and_clear_restore_sigmask(void)
|
|
{
|
|
struct thread_info *ti = current_thread_info();
|
|
if (!(ti->status & TS_RESTORE_SIGMASK))
|
|
return false;
|
|
ti->status &= ~TS_RESTORE_SIGMASK;
|
|
return true;
|
|
}
|
|
|
|
#define tsk_is_polling(t) test_tsk_thread_flag(t, TIF_POLLING_NRFLAG)
|
|
|
|
#endif /* !__ASSEMBLY__ */
|
|
|
|
#endif /* __KERNEL__ */
|
|
|
|
#endif /* __ASM_SH_THREAD_INFO_H */
|