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1da177e4 LT |
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 | ||
15 | struct 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 */ | |
dcd497f9 | 20 | int preempt_count; /* 0 => preemptable, |
1da177e4 LT |
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 | ||
b3461034 | 44 | #define THREAD_SIZE ((1 << CONFIG_KERNEL_STACK_ORDER) * PAGE_SIZE) |
1da177e4 LT |
45 | /* how to get the thread information struct from C */ |
46 | static inline struct thread_info *current_thread_info(void) | |
47 | { | |
48 | struct thread_info *ti; | |
b3461034 PBG |
49 | unsigned long mask = THREAD_SIZE - 1; |
50 | ti = (struct thread_info *) (((unsigned long) &ti) & ~mask); | |
1da177e4 LT |
51 | return ti; |
52 | } | |
53 | ||
54 | /* thread information allocation */ | |
1da177e4 LT |
55 | #define alloc_thread_info(tsk) \ |
56 | ((struct thread_info *) kmalloc(THREAD_SIZE, GFP_KERNEL)) | |
57 | #define free_thread_info(ti) kfree(ti) | |
58 | ||
59 | #define get_thread_info(ti) get_task_struct((ti)->task) | |
60 | #define put_thread_info(ti) put_task_struct((ti)->task) | |
61 | ||
62 | #endif | |
63 | ||
affac4bc | 64 | #define PREEMPT_ACTIVE 0x10000000 |
1da177e4 LT |
65 | |
66 | #define TIF_SYSCALL_TRACE 0 /* syscall trace active */ | |
67 | #define TIF_SIGPENDING 1 /* signal pending */ | |
68 | #define TIF_NEED_RESCHED 2 /* rescheduling necessary */ | |
69 | #define TIF_POLLING_NRFLAG 3 /* true if poll_idle() is polling | |
70 | * TIF_NEED_RESCHED | |
71 | */ | |
72 | #define TIF_RESTART_BLOCK 4 | |
73 | #define TIF_MEMDIE 5 | |
79d20b14 | 74 | #define TIF_SYSCALL_AUDIT 6 |
1da177e4 LT |
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) | |
79d20b14 JD |
80 | #define _TIF_MEMDIE (1 << TIF_MEMDIE) |
81 | #define _TIF_SYSCALL_AUDIT (1 << TIF_SYSCALL_AUDIT) | |
1da177e4 LT |
82 | |
83 | #endif | |
84 | ||
85 | /* | |
86 | * Overrides for Emacs so that we follow Linus's tabbing style. | |
87 | * Emacs will notice this stuff at the end of the file and automatically | |
88 | * adjust the settings for this buffer only. This must remain at the end | |
89 | * of the file. | |
90 | * --------------------------------------------------------------------------- | |
91 | * Local variables: | |
92 | * c-file-style: "linux" | |
93 | * End: | |
94 | */ |