arch/parisc/include/asm/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 #include <asm/special_insns.h>
   9
  10 struct 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 */