LXR linux/arch/um/include/asm/thread

   1/*
   2 * Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
   3 * Licensed under the GPL
   4 */
   5
   6#ifndef __UM_THREAD_INFO_H
   7#define __UM_THREAD_INFO_H
   8
   9#ifndef __ASSEMBLY__
  10
  11#include <asm/types.h>
  12#include <asm/page.h>
  13#include <asm/uaccess.h>
  14
  15struct thread_info {
  16        struct task_struct      *task;          /* main task structure */
  17        struct exec_domain      *exec_domain;   /* execution domain */
  18        unsigned long           flags;          /* low level flags */
  19        __u32                   cpu;            /* current CPU */
  20        int                     preempt_count;  /* 0 => preemptable,
  21                                                   <0 => BUG */
  22        mm_segment_t            addr_limit;     /* thread address space:
  23                                                   0-0xBFFFFFFF for user
  24                                                   0-0xFFFFFFFF for kernel */
  25        struct restart_block    restart_block;
  26        struct thread_info      *real_thread;    /* Points to non-IRQ stack */
  27};
  28
  29#define INIT_THREAD_INFO(tsk)                   \
  30{                                               \
  31        .task =         &tsk,                   \
  32        .exec_domain =  &default_exec_domain,   \
  33        .flags =                0,              \
  34        .cpu =          0,                      \
  35        .preempt_count = INIT_PREEMPT_COUNT,    \
  36        .addr_limit =   KERNEL_DS,              \
  37        .restart_block =  {                     \
  38                .fn =  do_no_restart_syscall,   \
  39        },                                      \
  40        .real_thread = NULL,                    \
  41}
  42
  43#define init_thread_info        (init_thread_union.thread_info)
  44#define init_stack              (init_thread_union.stack)
  45
  46#define THREAD_SIZE ((1 << CONFIG_KERNEL_STACK_ORDER) * PAGE_SIZE)
  47/* how to get the thread information struct from C */
  48static inline struct thread_info *current_thread_info(void)
  49{
  50        struct thread_info *ti;
  51        unsigned long mask = THREAD_SIZE - 1;
  52        void *p;
  53
  54        asm volatile ("" : "=r" (p) : "0" (&ti));
  55        ti = (struct thread_info *) (((unsigned long)p) & ~mask);
  56        return ti;
  57}
  58
  59#define THREAD_SIZE_ORDER CONFIG_KERNEL_STACK_ORDER
  60
  61#endif
  62
  63#define PREEMPT_ACTIVE          0x10000000
  64
  65#define TIF_SYSCALL_TRACE       0       /* syscall trace active */
  66#define TIF_SIGPENDING          1       /* signal pending */
  67#define TIF_NEED_RESCHED        2       /* rescheduling necessary */
  68#define TIF_RESTART_BLOCK       4
  69#define TIF_MEMDIE              5       /* is terminating due to OOM killer */
  70#define TIF_SYSCALL_AUDIT       6
  71#define TIF_RESTORE_SIGMASK     7
  72#define TIF_NOTIFY_RESUME       8
  73
  74#define _TIF_SYSCALL_TRACE      (1 << TIF_SYSCALL_TRACE)
  75#define _TIF_SIGPENDING         (1 << TIF_SIGPENDING)
  76#define _TIF_NEED_RESCHED       (1 << TIF_NEED_RESCHED)
  77#define _TIF_MEMDIE             (1 << TIF_MEMDIE)
  78#define _TIF_SYSCALL_AUDIT      (1 << TIF_SYSCALL_AUDIT)
  79
  80#endif
  81