include/asm-parisc/thread_info.h

   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
   9 struct 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_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_ORDER)
  41 #define THREAD_SHIFT            (PAGE_SHIFT + THREAD_ORDER)
  42
  43 #define alloc_thread_info(tsk) ((struct thread_info *) \
  44                         __get_free_pages(GFP_KERNEL, THREAD_ORDER))
  45 #define free_thread_info(ti)    free_pages((unsigned long) (ti), THREAD_ORDER)
  46
  47 /* how to get the thread information struct from C */
  48 #define current_thread_info()   ((struct thread_info *)mfctl(30))
  49
  50 #endif /* !__ASSEMBLY */
  51
  52 #define PREEMPT_ACTIVE_BIT      28
  53 #define PREEMPT_ACTIVE          (1 << PREEMPT_ACTIVE_BIT)
  54
  55 /*
  56  * thread information flags
  57  */
  58 #define TIF_SYSCALL_TRACE       0       /* syscall trace active */
  59 #define TIF_SIGPENDING          1       /* signal pending */
  60 #define TIF_NEED_RESCHED        2       /* rescheduling necessary */
  61 #define TIF_POLLING_NRFLAG      3       /* true if poll_idle() is polling TIF_NEED_RESCHED */
  62 #define TIF_32BIT               4       /* 32 bit binary */
  63 #define TIF_MEMDIE              5
  64 #define TIF_RESTORE_SIGMASK     6       /* restore saved signal mask */
  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_RESTORE_SIGMASK    (1 << TIF_RESTORE_SIGMASK)
  72
  73 #define _TIF_USER_WORK_MASK     (_TIF_SIGPENDING | \
  74                                  _TIF_NEED_RESCHED | _TIF_RESTORE_SIGMASK)
  75
  76 #endif /* __KERNEL__ */
  77
  78 #endif /* _ASM_PARISC_THREAD_INFO_H */