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-rw-r--r--include/asm-um/thread_info.h93
1 files changed, 93 insertions, 0 deletions
diff --git a/include/asm-um/thread_info.h b/include/asm-um/thread_info.h
new file mode 100644
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+++ b/include/asm-um/thread_info.h
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1/*
2 * Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
3 * Licensed under the GPL
4 */
5
6#ifndef __UM_THREAD_INFO_H
7#define __UM_THREAD_INFO_H
8
9#ifndef __ASSEMBLY__
10
11#include <linux/config.h>
12#include <asm/processor.h>
13#include <asm/types.h>
14
15struct thread_info {
16 struct task_struct *task; /* main task structure */
17 struct exec_domain *exec_domain; /* execution domain */
18 unsigned long flags; /* low level flags */
19 __u32 cpu; /* current CPU */
20 __s32 preempt_count; /* 0 => preemptable,
21 <0 => BUG */
22 mm_segment_t addr_limit; /* thread address space:
23 0-0xBFFFFFFF for user
24 0-0xFFFFFFFF for kernel */
25 struct restart_block restart_block;
26};
27
28#define INIT_THREAD_INFO(tsk) \
29{ \
30 task: &tsk, \
31 exec_domain: &default_exec_domain, \
32 flags: 0, \
33 cpu: 0, \
34 preempt_count: 1, \
35 addr_limit: KERNEL_DS, \
36 restart_block: { \
37 fn: do_no_restart_syscall, \
38 }, \
39}
40
41#define init_thread_info (init_thread_union.thread_info)
42#define init_stack (init_thread_union.stack)
43
44/* how to get the thread information struct from C */
45static inline struct thread_info *current_thread_info(void)
46{
47 struct thread_info *ti;
48 unsigned long mask = PAGE_SIZE *
49 (1 << CONFIG_KERNEL_STACK_ORDER) - 1;
50 ti = (struct thread_info *) (((unsigned long) &ti) & ~mask);
51 return ti;
52}
53
54/* thread information allocation */
55#define THREAD_SIZE ((1 << CONFIG_KERNEL_STACK_ORDER) * PAGE_SIZE)
56#define alloc_thread_info(tsk) \
57 ((struct thread_info *) kmalloc(THREAD_SIZE, GFP_KERNEL))
58#define free_thread_info(ti) kfree(ti)
59
60#define get_thread_info(ti) get_task_struct((ti)->task)
61#define put_thread_info(ti) put_task_struct((ti)->task)
62
63#endif
64
65#define PREEMPT_ACTIVE 0x4000000
66
67#define TIF_SYSCALL_TRACE 0 /* syscall trace active */
68#define TIF_SIGPENDING 1 /* signal pending */
69#define TIF_NEED_RESCHED 2 /* rescheduling necessary */
70#define TIF_POLLING_NRFLAG 3 /* true if poll_idle() is polling
71 * TIF_NEED_RESCHED
72 */
73#define TIF_RESTART_BLOCK 4
74#define TIF_MEMDIE 5
75
76#define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE)
77#define _TIF_SIGPENDING (1 << TIF_SIGPENDING)
78#define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED)
79#define _TIF_POLLING_NRFLAG (1 << TIF_POLLING_NRFLAG)
80#define _TIF_RESTART_BLOCK (1 << TIF_RESTART_BLOCK)
81
82#endif
83
84/*
85 * Overrides for Emacs so that we follow Linus's tabbing style.
86 * Emacs will notice this stuff at the end of the file and automatically
87 * adjust the settings for this buffer only. This must remain at the end
88 * of the file.
89 * ---------------------------------------------------------------------------
90 * Local variables:
91 * c-file-style: "linux"
92 * End:
93 */