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[karo-tx-linux.git] / 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         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 };
17
18 #define INIT_THREAD_INFO(tsk)                   \
19 {                                               \
20         .task           = &tsk,                 \
21         .flags          = 0,                    \
22         .cpu            = 0,                    \
23         .addr_limit     = KERNEL_DS,            \
24         .preempt_count  = INIT_PREEMPT_COUNT,   \
25 }
26
27 #define init_thread_info        (init_thread_union.thread_info)
28 #define init_stack              (init_thread_union.stack)
29
30 /* how to get the thread information struct from C */
31 #define current_thread_info()   ((struct thread_info *)mfctl(30))
32
33 #endif /* !__ASSEMBLY */
34
35 /* thread information allocation */
36
37 #define THREAD_SIZE_ORDER       3 /* PA-RISC requires at least 32k stack */
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_SIZE_ORDER)
41 #define THREAD_SHIFT            (PAGE_SHIFT + THREAD_SIZE_ORDER)
42
43 /*
44  * thread information flags
45  */
46 #define TIF_SYSCALL_TRACE       0       /* syscall trace active */
47 #define TIF_SIGPENDING          1       /* signal pending */
48 #define TIF_NEED_RESCHED        2       /* rescheduling necessary */
49 #define TIF_POLLING_NRFLAG      3       /* true if poll_idle() is polling TIF_NEED_RESCHED */
50 #define TIF_32BIT               4       /* 32 bit binary */
51 #define TIF_MEMDIE              5       /* is terminating due to OOM killer */
52 #define TIF_SYSCALL_AUDIT       7       /* syscall auditing active */
53 #define TIF_NOTIFY_RESUME       8       /* callback before returning to user */
54 #define TIF_SINGLESTEP          9       /* single stepping? */
55 #define TIF_BLOCKSTEP           10      /* branch stepping? */
56 #define TIF_SECCOMP             11      /* secure computing */
57 #define TIF_SYSCALL_TRACEPOINT  12      /* syscall tracepoint instrumentation */
58
59 #define _TIF_SYSCALL_TRACE      (1 << TIF_SYSCALL_TRACE)
60 #define _TIF_SIGPENDING         (1 << TIF_SIGPENDING)
61 #define _TIF_NEED_RESCHED       (1 << TIF_NEED_RESCHED)
62 #define _TIF_POLLING_NRFLAG     (1 << TIF_POLLING_NRFLAG)
63 #define _TIF_32BIT              (1 << TIF_32BIT)
64 #define _TIF_SYSCALL_AUDIT      (1 << TIF_SYSCALL_AUDIT)
65 #define _TIF_NOTIFY_RESUME      (1 << TIF_NOTIFY_RESUME)
66 #define _TIF_SINGLESTEP         (1 << TIF_SINGLESTEP)
67 #define _TIF_BLOCKSTEP          (1 << TIF_BLOCKSTEP)
68 #define _TIF_SECCOMP            (1 << TIF_SECCOMP)
69 #define _TIF_SYSCALL_TRACEPOINT (1 << TIF_SYSCALL_TRACEPOINT)
70
71 #define _TIF_USER_WORK_MASK     (_TIF_SIGPENDING | _TIF_NOTIFY_RESUME | \
72                                  _TIF_NEED_RESCHED)
73 #define _TIF_SYSCALL_TRACE_MASK (_TIF_SYSCALL_TRACE | _TIF_SINGLESTEP | \
74                                  _TIF_BLOCKSTEP | _TIF_SYSCALL_AUDIT | \
75                                  _TIF_SECCOMP | _TIF_SYSCALL_TRACEPOINT)
76
77 #ifdef CONFIG_64BIT
78 # ifdef CONFIG_COMPAT
79 #  define is_32bit_task()       (test_thread_flag(TIF_32BIT))
80 # else
81 #  define is_32bit_task()       (0)
82 # endif
83 #else
84 # define is_32bit_task()        (1)
85 #endif
86
87 #endif /* __KERNEL__ */
88
89 #endif /* _ASM_PARISC_THREAD_INFO_H */