release/src-rt-6.x.4708/linux/linux-2.6.36/arch/score/include/asm/thread_info.h

   1 #ifndef _ASM_SCORE_THREAD_INFO_H
   2 #define _ASM_SCORE_THREAD_INFO_H
   3
   4 #ifdef __KERNEL__
   5
   6 #define KU_MASK 0x08
   7 #define KU_USER 0x08
   8 #define KU_KERN 0x00
   9
  10 #include <asm/page.h>
  11 #include <linux/const.h>
  12
  13 /* thread information allocation */
  14 #define THREAD_SIZE_ORDER       (1)
  15 #define THREAD_SIZE             (PAGE_SIZE << THREAD_SIZE_ORDER)
  16 #define THREAD_MASK             (THREAD_SIZE - _AC(1,UL))
  17 #define __HAVE_ARCH_THREAD_INFO_ALLOCATOR
  18
  19 #ifndef __ASSEMBLY__
  20
  21 #include <asm/processor.h>
  22
  23 /*
  24  * low level task data that entry.S needs immediate access to
  25  * - this struct should fit entirely inside of one cache line
  26  * - this struct shares the supervisor stack pages
  27  * - if the contents of this structure are changed, the assembly constants
  28  *   must also be changed
  29  */
  30 struct thread_info {
  31         struct task_struct      *task;          /* main task structure */
  32         struct exec_domain      *exec_domain;   /* execution domain */
  33         unsigned long           flags;          /* low level flags */
  34         unsigned long           tp_value;       /* thread pointer */
  35         __u32                   cpu;            /* current CPU */
  36
  37         /* 0 => preemptable, < 0 => BUG */
  38         int                     preempt_count;
  39
  40         /*
  41          * thread address space:
  42          * 0-0xBFFFFFFF for user-thead
  43          * 0-0xFFFFFFFF for kernel-thread
  44          */
  45         mm_segment_t            addr_limit;
  46         struct restart_block    restart_block;
  47         struct pt_regs          *regs;
  48 };
  49
  50 /*
  51  * macros/functions for gaining access to the thread information structure
  52  *
  53  * preempt_count needs to be 1 initially, until the scheduler is functional.
  54  */
  55 #define INIT_THREAD_INFO(tsk)                   \
  56 {                                               \
  57         .task           = &tsk,                 \
  58         .exec_domain    = &default_exec_domain, \
  59         .cpu            = 0,                    \
  60         .preempt_count  = 1,                    \
  61         .addr_limit     = KERNEL_DS,            \
  62         .restart_block  = {                     \
  63                 .fn = do_no_restart_syscall,    \
  64         },                                      \
  65 }
  66
  67 #define init_thread_info        (init_thread_union.thread_info)
  68 #define init_stack              (init_thread_union.stack)
  69
  70 /* How to get the thread information struct from C. */
  71 register struct thread_info *__current_thread_info __asm__("r28");
  72 #define current_thread_info()   __current_thread_info
  73
  74 #define alloc_thread_info(tsk) kmalloc(THREAD_SIZE, GFP_KERNEL)
  75 #define free_thread_info(info) kfree(info)
  76
  77 #endif /* !__ASSEMBLY__ */
  78
  79 #define PREEMPT_ACTIVE          0x10000000
  80
  81 /*
  82  * thread information flags
  83  * - these are process state flags that various assembly files may need to
  84  *   access
  85  * - pending work-to-be-done flags are in LSW
  86  * - other flags in MSW
  87  */
  88 #define TIF_SYSCALL_TRACE       0       /* syscall trace active */
  89 #define TIF_SIGPENDING          1       /* signal pending */
  90 #define TIF_NEED_RESCHED        2       /* rescheduling necessary */
  91 #define TIF_NOTIFY_RESUME       5       /* callback before returning to user */
  92 #define TIF_RESTORE_SIGMASK     9       /* restore signal mask in do_signal() */
  93 #define TIF_POLLING_NRFLAG      17      /* true if poll_idle() is polling
  94                                                  TIF_NEED_RESCHED */
  95 #define TIF_MEMDIE              18      /* is terminating due to OOM killer */
  96
  97 #define _TIF_SYSCALL_TRACE      (1<<TIF_SYSCALL_TRACE)
  98 #define _TIF_SIGPENDING         (1<<TIF_SIGPENDING)
  99 #define _TIF_NEED_RESCHED       (1<<TIF_NEED_RESCHED)
 100 #define _TIF_NOTIFY_RESUME      (1<<TIF_NOTIFY_RESUME)
 101 #define _TIF_RESTORE_SIGMASK    (1<<TIF_RESTORE_SIGMASK)
 102 #define _TIF_POLLING_NRFLAG     (1<<TIF_POLLING_NRFLAG)
 103
 104 #define _TIF_WORK_MASK          (0x0000ffff)
 105
 106 #endif /* __KERNEL__ */
 107
 108 #endif /* _ASM_SCORE_THREAD_INFO_H */