Linux-2.6.12-rc2
[linux-2.6.git] / 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         __s32 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 #define get_thread_info(ti)     get_task_struct((ti)->task)
47 #define put_thread_info(ti)     put_task_struct((ti)->task)
48
49
50 /* how to get the thread information struct from C */
51 #define current_thread_info()   ((struct thread_info *)mfctl(30))
52
53 #endif /* !__ASSEMBLY */
54
55 #define PREEMPT_ACTIVE          0x10000000
56
57 /*
58  * thread information flags
59  */
60 #define TIF_SYSCALL_TRACE       0       /* syscall trace active */
61 #define TIF_NOTIFY_RESUME       1       /* resumption notification requested */
62 #define TIF_SIGPENDING          2       /* signal pending */
63 #define TIF_NEED_RESCHED        3       /* rescheduling necessary */
64 #define TIF_POLLING_NRFLAG      4       /* true if poll_idle() is polling TIF_NEED_RESCHED */
65 #define TIF_32BIT               5       /* 32 bit binary */
66 #define TIF_MEMDIE              6
67
68 #define _TIF_SYSCALL_TRACE      (1 << TIF_SYSCALL_TRACE)
69 #define _TIF_NOTIFY_RESUME      (1 << TIF_NOTIFY_RESUME)
70 #define _TIF_SIGPENDING         (1 << TIF_SIGPENDING)
71 #define _TIF_NEED_RESCHED       (1 << TIF_NEED_RESCHED)
72 #define _TIF_POLLING_NRFLAG     (1 << TIF_POLLING_NRFLAG)
73 #define _TIF_32BIT              (1 << TIF_32BIT)
74
75 #define _TIF_USER_WORK_MASK     (_TIF_NOTIFY_RESUME | _TIF_SIGPENDING | \
76                                  _TIF_NEED_RESCHED)
77
78 #endif /* __KERNEL__ */
79
80 #endif /* _ASM_PARISC_THREAD_INFO_H */