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         __u32 flags;                    /* thread_info flags (see TIF_*) */
  13         __u32 cpu;                      /* current CPU */
  14         mm_segment_t addr_limit;        /* user-level address space limit */
  15         struct restart_block restart_block;
  16         __s32 preempt_count;            /* 0=premptable, <0=BUG; will also serve as bh-counter */
  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:  0,                      \
  27 }
  28
  29 #define init_thread_info        (init_thread_union.thread_info)
  30 #define init_stack              (init_thread_union.stack)
  31
  32 /* thread information allocation */
  33
  34 #define THREAD_ORDER            2
  35 /* Be sure to hunt all references to this down when you change the size of
  36  * the kernel stack */
  37 #define THREAD_SIZE             (PAGE_SIZE << THREAD_ORDER)
  38 #define THREAD_SHIFT            (PAGE_SHIFT + THREAD_ORDER)
  39
  40 #define alloc_thread_info(tsk) ((struct thread_info *) \
  41                         __get_free_pages(GFP_KERNEL, THREAD_ORDER))
  42 #define free_thread_info(ti)    free_pages((unsigned long) (ti), THREAD_ORDER)
  43 #define get_thread_info(ti)     get_task_struct((ti)->task)
  44 #define put_thread_info(ti)     put_task_struct((ti)->task)
  45
  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          0x4000000
  53
  54 /*
  55  * thread information flags
  56  */
  57 #define TIF_SYSCALL_TRACE       0       /* syscall trace active */
  58 #define TIF_NOTIFY_RESUME       1       /* resumption notification requested */
  59 #define TIF_SIGPENDING          2       /* signal pending */
  60 #define TIF_NEED_RESCHED        3       /* rescheduling necessary */
  61 #define TIF_POLLING_NRFLAG      4       /* true if poll_idle() is polling TIF_NEED_RESCHED */
  62 #define TIF_32BIT               5       /* 32 bit binary */
  63
  64 #define _TIF_SYSCALL_TRACE      (1 << TIF_SYSCALL_TRACE)
  65 #define _TIF_NOTIFY_RESUME      (1 << TIF_NOTIFY_RESUME)
  66 #define _TIF_SIGPENDING         (1 << TIF_SIGPENDING)
  67 #define _TIF_NEED_RESCHED       (1 << TIF_NEED_RESCHED)
  68 #define _TIF_POLLING_NRFLAG     (1 << TIF_POLLING_NRFLAG)
  69 #define _TIF_32BIT              (1 << TIF_32BIT)
  70
  71 #define _TIF_USER_WORK_MASK     (_TIF_NOTIFY_RESUME | _TIF_SIGPENDING | \
  72                                  _TIF_NEED_RESCHED)
  73
  74 #endif /* __KERNEL__ */
  75
  76 #endif /* _ASM_PARISC_THREAD_INFO_H */