LXR linux/arch/parisc/include/asm/thread

   1#ifndef _ASM_PARISC_THREAD_INFO_H
   2#define _ASM_PARISC_THREAD_INFO_H
   3
   4#ifdef __KERNEL__
   5
   6#ifndef __ASSEMBLY__
   7#include <asm/processor.h>
   8
   9struct thread_info {
  10        struct task_struct *task;       /* main task structure */
  11        struct exec_domain *exec_domain;/* execution domain */
  12        unsigned long flags;            /* thread_info flags (see TIF_*) */
  13        mm_segment_t addr_limit;        /* user-level address space limit */
  14        __u32 cpu;                      /* current CPU */
  15        int preempt_count;              /* 0=premptable, <0=BUG; will also serve as bh-counter */
  16        struct restart_block restart_block;
  17};
  18
  19#define INIT_THREAD_INFO(tsk)                   \
  20{                                               \
  21        .task           = &tsk,                 \
  22        .exec_domain    = &default_exec_domain, \
  23        .flags          = 0,                    \
  24        .cpu            = 0,                    \
  25        .addr_limit     = KERNEL_DS,            \
  26        .preempt_count  = 1,                    \
  27        .restart_block  = {                     \
  28                .fn = do_no_restart_syscall     \
  29        }                                       \
  30}
  31
  32#define init_thread_info        (init_thread_union.thread_info)
  33#define init_stack              (init_thread_union.stack)
  34
  35/* thread information allocation */
  36
  37#define THREAD_SIZE_ORDER            2
  38/* Be sure to hunt all references to this down when you change the size of
  39 * the kernel stack */
  40#define THREAD_SIZE             (PAGE_SIZE << THREAD_SIZE_ORDER)
  41#define THREAD_SHIFT            (PAGE_SHIFT + THREAD_SIZE_ORDER)
  42
  43/* how to get the thread information struct from C */
  44#define current_thread_info()   ((struct thread_info *)mfctl(30))
  45
  46#endif /* !__ASSEMBLY */
  47
  48#define PREEMPT_ACTIVE_BIT      28
  49#define PREEMPT_ACTIVE          (1 << PREEMPT_ACTIVE_BIT)
  50
  51/*
  52 * thread information flags
  53 */
  54#define TIF_SYSCALL_TRACE       0       /* syscall trace active */
  55#define TIF_SIGPENDING          1       /* signal pending */
  56#define TIF_NEED_RESCHED        2       /* rescheduling necessary */
  57#define TIF_POLLING_NRFLAG      3       /* true if poll_idle() is polling TIF_NEED_RESCHED */
  58#define TIF_32BIT               4       /* 32 bit binary */
  59#define TIF_MEMDIE              5
  60#define TIF_RESTORE_SIGMASK     6       /* restore saved signal mask */
  61#define TIF_FREEZE              7       /* is freezing for suspend */
  62
  63#define _TIF_SYSCALL_TRACE      (1 << TIF_SYSCALL_TRACE)
  64#define _TIF_SIGPENDING         (1 << TIF_SIGPENDING)
  65#define _TIF_NEED_RESCHED       (1 << TIF_NEED_RESCHED)
  66#define _TIF_POLLING_NRFLAG     (1 << TIF_POLLING_NRFLAG)
  67#define _TIF_32BIT              (1 << TIF_32BIT)
  68#define _TIF_RESTORE_SIGMASK    (1 << TIF_RESTORE_SIGMASK)
  69#define _TIF_FREEZE             (1 << TIF_FREEZE)
  70
  71#define _TIF_USER_WORK_MASK     (_TIF_SIGPENDING | \
  72                                 _TIF_NEED_RESCHED | _TIF_RESTORE_SIGMASK)
  73
  74#endif /* __KERNEL__ */
  75
  76#endif /* _ASM_PARISC_THREAD_INFO_H */
  77