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Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
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linux
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
10struct 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
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_RESTORE_SIGMASK (1 << TIF_RESTORE_SIGMASK)
72#define _TIF_NOTIFY_RESUME (1 << TIF_NOTIFY_RESUME)
73#define _TIF_SINGLESTEP (1 << TIF_SINGLESTEP)
74#define _TIF_BLOCKSTEP (1 << TIF_BLOCKSTEP)
75
76#define _TIF_USER_WORK_MASK (_TIF_SIGPENDING | _TIF_NOTIFY_RESUME | \
77 _TIF_NEED_RESCHED)
78
79#endif /* __KERNEL__ */
80
81#endif /* _ASM_PARISC_THREAD_INFO_H */