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#include <asm/special_insns.h>
   9
  10struct thread_info {
  11        struct task_struct *task;       /* main task structure */
  12        struct exec_domain *exec_domain;/* execution domain */
  13        unsigned long flags;            /* thread_info flags (see TIF_*) */
  14        mm_segment_t addr_limit;        /* user-level address space limit */
  15        __u32 cpu;                      /* current CPU */
  16        int preempt_count;              /* 0=premptable, <0=BUG; will also serve as bh-counter */
  17        struct restart_block restart_block;
  18};
  19
  20#define INIT_THREAD_INFO(tsk)                   \
  21{                                               \
  22        .task           = &tsk,                 \
  23        .exec_domain    = &default_exec_domain, \
  24        .flags          = 0,                    \
  25        .cpu            = 0,                    \
  26        .addr_limit     = KERNEL_DS,            \
  27        .preempt_count  = INIT_PREEMPT_COUNT,   \
  28        .restart_block  = {                     \
  29                .fn = do_no_restart_syscall     \
  30        }                                       \
  31}
  32
  33#define init_thread_info        (init_thread_union.thread_info)
  34#define init_stack              (init_thread_union.stack)
  35
  36/* how to get the thread information struct from C */
  37#define current_thread_info()   ((struct thread_info *)mfctl(30))
  38
  39#endif /* !__ASSEMBLY */
  40
  41/* thread information allocation */
  42
  43#define THREAD_SIZE_ORDER       2 /* PA-RISC requires at least 16k stack */
  44/* Be sure to hunt all references to this down when you change the size of
  45 * the kernel stack */
  46#define THREAD_SIZE             (PAGE_SIZE << THREAD_SIZE_ORDER)
  47#define THREAD_SHIFT            (PAGE_SHIFT + THREAD_SIZE_ORDER)
  48
  49#define PREEMPT_ACTIVE_BIT      28
  50#define PREEMPT_ACTIVE          (1 << PREEMPT_ACTIVE_BIT)
  51
  52/*
  53 * thread information flags
  54 */
  55#define TIF_SYSCALL_TRACE       0       /* syscall trace active */
  56#define TIF_SIGPENDING          1       /* signal pending */
  57#define TIF_NEED_RESCHED        2       /* rescheduling necessary */
  58#define TIF_POLLING_NRFLAG      3       /* true if poll_idle() is polling TIF_NEED_RESCHED */
  59#define TIF_32BIT               4       /* 32 bit binary */
  60#define TIF_MEMDIE              5       /* is terminating due to OOM killer */
  61#define TIF_RESTORE_SIGMASK     6       /* restore saved signal mask */
  62#define TIF_NOTIFY_RESUME       8       /* callback before returning to user */
  63#define TIF_SINGLESTEP          9       /* single stepping? */
  64#define TIF_BLOCKSTEP           10      /* branch stepping? */
  65
  66#define _TIF_SYSCALL_TRACE      (1 << TIF_SYSCALL_TRACE)
  67#define _TIF_SIGPENDING         (1 << TIF_SIGPENDING)
  68#define _TIF_NEED_RESCHED       (1 << TIF_NEED_RESCHED)
  69#define _TIF_POLLING_NRFLAG     (1 << TIF_POLLING_NRFLAG)
  70#define _TIF_32BIT              (1 << TIF_32BIT)
  71#define _TIF_NOTIFY_RESUME      (1 << TIF_NOTIFY_RESUME)
  72#define _TIF_SINGLESTEP         (1 << TIF_SINGLESTEP)
  73#define _TIF_BLOCKSTEP          (1 << TIF_BLOCKSTEP)
  74
  75#define _TIF_USER_WORK_MASK     (_TIF_SIGPENDING | _TIF_NOTIFY_RESUME | \
  76                                 _TIF_NEED_RESCHED)
  77#define _TIF_SYSCALL_TRACE_MASK (_TIF_SYSCALL_TRACE | _TIF_SINGLESTEP | \
  78                                 _TIF_BLOCKSTEP)
  79
  80#endif /* __KERNEL__ */
  81
  82#endif /* _ASM_PARISC_THREAD_INFO_H */
  83