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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 | ||
1da177e4 LT |
11 | #include <asm/processor.h> |
12 | #include <asm/types.h> | |
13 | ||
14 | struct thread_info { | |
15 | struct task_struct *task; /* main task structure */ | |
16 | struct exec_domain *exec_domain; /* execution domain */ | |
17 | unsigned long flags; /* low level flags */ | |
18 | __u32 cpu; /* current CPU */ | |
dcd497f9 | 19 | int preempt_count; /* 0 => preemptable, |
1da177e4 LT |
20 | <0 => BUG */ |
21 | mm_segment_t addr_limit; /* thread address space: | |
22 | 0-0xBFFFFFFF for user | |
23 | 0-0xFFFFFFFF for kernel */ | |
24 | struct restart_block restart_block; | |
25 | }; | |
26 | ||
27 | #define INIT_THREAD_INFO(tsk) \ | |
28 | { \ | |
4d338e1a AV |
29 | .task = &tsk, \ |
30 | .exec_domain = &default_exec_domain, \ | |
31 | .flags = 0, \ | |
32 | .cpu = 0, \ | |
33 | .preempt_count = 1, \ | |
34 | .addr_limit = KERNEL_DS, \ | |
35 | .restart_block = { \ | |
36 | .fn = do_no_restart_syscall, \ | |
1da177e4 LT |
37 | }, \ |
38 | } | |
39 | ||
40 | #define init_thread_info (init_thread_union.thread_info) | |
41 | #define init_stack (init_thread_union.stack) | |
42 | ||
b3461034 | 43 | #define THREAD_SIZE ((1 << CONFIG_KERNEL_STACK_ORDER) * PAGE_SIZE) |
1da177e4 LT |
44 | /* how to get the thread information struct from C */ |
45 | static inline struct thread_info *current_thread_info(void) | |
46 | { | |
47 | struct thread_info *ti; | |
b3461034 PBG |
48 | unsigned long mask = THREAD_SIZE - 1; |
49 | ti = (struct thread_info *) (((unsigned long) &ti) & ~mask); | |
1da177e4 LT |
50 | return ti; |
51 | } | |
52 | ||
53 | /* thread information allocation */ | |
1da177e4 LT |
54 | #define alloc_thread_info(tsk) \ |
55 | ((struct thread_info *) kmalloc(THREAD_SIZE, GFP_KERNEL)) | |
56 | #define free_thread_info(ti) kfree(ti) | |
57 | ||
1da177e4 LT |
58 | #endif |
59 | ||
affac4bc | 60 | #define PREEMPT_ACTIVE 0x10000000 |
1da177e4 LT |
61 | |
62 | #define TIF_SYSCALL_TRACE 0 /* syscall trace active */ | |
63 | #define TIF_SIGPENDING 1 /* signal pending */ | |
64 | #define TIF_NEED_RESCHED 2 /* rescheduling necessary */ | |
65 | #define TIF_POLLING_NRFLAG 3 /* true if poll_idle() is polling | |
66 | * TIF_NEED_RESCHED | |
67 | */ | |
68 | #define TIF_RESTART_BLOCK 4 | |
69 | #define TIF_MEMDIE 5 | |
79d20b14 | 70 | #define TIF_SYSCALL_AUDIT 6 |
2fc10620 | 71 | #define TIF_RESTORE_SIGMASK 7 |
1da177e4 LT |
72 | |
73 | #define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE) | |
74 | #define _TIF_SIGPENDING (1 << TIF_SIGPENDING) | |
75 | #define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED) | |
76 | #define _TIF_POLLING_NRFLAG (1 << TIF_POLLING_NRFLAG) | |
79d20b14 JD |
77 | #define _TIF_MEMDIE (1 << TIF_MEMDIE) |
78 | #define _TIF_SYSCALL_AUDIT (1 << TIF_SYSCALL_AUDIT) | |
2fc10620 | 79 | #define _TIF_RESTORE_SIGMASK (1 << TIF_RESTORE_SIGMASK) |
1da177e4 LT |
80 | |
81 | #endif |