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1da177e4 | 1 | /* |
4baa9922 | 2 | * arch/arm/include/asm/thread_info.h |
1da177e4 LT |
3 | * |
4 | * Copyright (C) 2002 Russell King. | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License version 2 as | |
8 | * published by the Free Software Foundation. | |
9 | */ | |
10 | #ifndef __ASM_ARM_THREAD_INFO_H | |
11 | #define __ASM_ARM_THREAD_INFO_H | |
12 | ||
13 | #ifdef __KERNEL__ | |
14 | ||
8dc39b88 | 15 | #include <linux/compiler.h> |
1da177e4 | 16 | #include <asm/fpstate.h> |
9a2b51b6 | 17 | #include <asm/page.h> |
1da177e4 | 18 | |
4f7a1812 | 19 | #define THREAD_SIZE_ORDER 1 |
9a2b51b6 | 20 | #define THREAD_SIZE (PAGE_SIZE << THREAD_SIZE_ORDER) |
4f7a1812 RK |
21 | #define THREAD_START_SP (THREAD_SIZE - 8) |
22 | ||
1da177e4 LT |
23 | #ifndef __ASSEMBLY__ |
24 | ||
25 | struct task_struct; | |
1da177e4 | 26 | |
1da177e4 | 27 | #include <asm/types.h> |
1da177e4 LT |
28 | |
29 | typedef unsigned long mm_segment_t; | |
30 | ||
31 | struct cpu_context_save { | |
32 | __u32 r4; | |
33 | __u32 r5; | |
34 | __u32 r6; | |
35 | __u32 r7; | |
36 | __u32 r8; | |
37 | __u32 r9; | |
38 | __u32 sl; | |
39 | __u32 fp; | |
40 | __u32 sp; | |
41 | __u32 pc; | |
42 | __u32 extra[2]; /* Xscale 'acc' register, etc */ | |
43 | }; | |
44 | ||
45 | /* | |
46 | * low level task data that entry.S needs immediate access to. | |
47 | * __switch_to() assumes cpu_context follows immediately after cpu_domain. | |
48 | */ | |
49 | struct thread_info { | |
50 | unsigned long flags; /* low level flags */ | |
dcd497f9 | 51 | int preempt_count; /* 0 => preemptable, <0 => bug */ |
1da177e4 LT |
52 | mm_segment_t addr_limit; /* address limit */ |
53 | struct task_struct *task; /* main task structure */ | |
1da177e4 LT |
54 | __u32 cpu; /* cpu */ |
55 | __u32 cpu_domain; /* cpu domain */ | |
56 | struct cpu_context_save cpu_context; /* cpu context */ | |
5ba6d3fe | 57 | __u32 syscall; /* syscall number */ |
1da177e4 | 58 | __u8 used_cp[16]; /* thread used copro */ |
a4780ade | 59 | unsigned long tp_value[2]; /* TLS registers */ |
9fc31ddc | 60 | #ifdef CONFIG_CRUNCH |
c17fad11 | 61 | struct crunch_state crunchstate; |
9fc31ddc | 62 | #endif |
cdaabbd7 | 63 | union fp_state fpstate __attribute__((aligned(8))); |
1da177e4 | 64 | union vfp_state vfpstate; |
d7f864be CM |
65 | #ifdef CONFIG_ARM_THUMBEE |
66 | unsigned long thumbee_state; /* ThumbEE Handler Base register */ | |
67 | #endif | |
1da177e4 LT |
68 | }; |
69 | ||
70 | #define INIT_THREAD_INFO(tsk) \ | |
71 | { \ | |
72 | .task = &tsk, \ | |
1da177e4 | 73 | .flags = 0, \ |
c99e6efe | 74 | .preempt_count = INIT_PREEMPT_COUNT, \ |
1da177e4 | 75 | .addr_limit = KERNEL_DS, \ |
1da177e4 LT |
76 | } |
77 | ||
78 | #define init_thread_info (init_thread_union.thread_info) | |
79 | #define init_stack (init_thread_union.stack) | |
80 | ||
0abc08ba BW |
81 | /* |
82 | * how to get the current stack pointer in C | |
83 | */ | |
84 | register unsigned long current_stack_pointer asm ("sp"); | |
85 | ||
1da177e4 LT |
86 | /* |
87 | * how to get the thread information struct from C | |
88 | */ | |
89 | static inline struct thread_info *current_thread_info(void) __attribute_const__; | |
90 | ||
91 | static inline struct thread_info *current_thread_info(void) | |
92 | { | |
f6c9cbf0 BW |
93 | return (struct thread_info *) |
94 | (current_stack_pointer & ~(THREAD_SIZE - 1)); | |
1da177e4 LT |
95 | } |
96 | ||
1da177e4 | 97 | #define thread_saved_pc(tsk) \ |
1de765c1 | 98 | ((unsigned long)(task_thread_info(tsk)->cpu_context.pc)) |
2d7c11bf CM |
99 | #define thread_saved_sp(tsk) \ |
100 | ((unsigned long)(task_thread_info(tsk)->cpu_context.sp)) | |
870cbe8c NB |
101 | |
102 | #ifndef CONFIG_THUMB2_KERNEL | |
1da177e4 | 103 | #define thread_saved_fp(tsk) \ |
e7c1b32f | 104 | ((unsigned long)(task_thread_info(tsk)->cpu_context.fp)) |
870cbe8c NB |
105 | #else |
106 | #define thread_saved_fp(tsk) \ | |
107 | ((unsigned long)(task_thread_info(tsk)->cpu_context.r7)) | |
108 | #endif | |
1da177e4 | 109 | |
c17fad11 LB |
110 | extern void crunch_task_disable(struct thread_info *); |
111 | extern void crunch_task_copy(struct thread_info *, void *); | |
112 | extern void crunch_task_restore(struct thread_info *, void *); | |
113 | extern void crunch_task_release(struct thread_info *); | |
114 | ||
1da177e4 LT |
115 | extern void iwmmxt_task_disable(struct thread_info *); |
116 | extern void iwmmxt_task_copy(struct thread_info *, void *); | |
117 | extern void iwmmxt_task_restore(struct thread_info *, void *); | |
118 | extern void iwmmxt_task_release(struct thread_info *); | |
ae95bfbb | 119 | extern void iwmmxt_task_switch(struct thread_info *); |
1da177e4 | 120 | |
ad187f95 RK |
121 | extern void vfp_sync_hwstate(struct thread_info *); |
122 | extern void vfp_flush_hwstate(struct thread_info *); | |
3d1228ea | 123 | |
2498814f WD |
124 | struct user_vfp; |
125 | struct user_vfp_exc; | |
126 | ||
127 | extern int vfp_preserve_user_clear_hwstate(struct user_vfp __user *, | |
128 | struct user_vfp_exc __user *); | |
129 | extern int vfp_restore_user_hwstate(struct user_vfp __user *, | |
130 | struct user_vfp_exc __user *); | |
1da177e4 LT |
131 | #endif |
132 | ||
1da177e4 LT |
133 | /* |
134 | * thread information flags: | |
1da177e4 LT |
135 | * TIF_USEDFPU - FPU was used by this task this quantum (SMP) |
136 | * TIF_POLLING_NRFLAG - true if poll_idle() is polling TIF_NEED_RESCHED | |
137 | */ | |
3302cadd RK |
138 | #define TIF_SIGPENDING 0 /* signal pending */ |
139 | #define TIF_NEED_RESCHED 1 /* rescheduling necessary */ | |
d0420c83 | 140 | #define TIF_NOTIFY_RESUME 2 /* callback before returning to user */ |
3302cadd RK |
141 | #define TIF_UPROBE 3 /* breakpointed or singlestepping */ |
142 | #define TIF_SYSCALL_TRACE 4 /* syscall trace active */ | |
143 | #define TIF_SYSCALL_AUDIT 5 /* syscall auditing active */ | |
144 | #define TIF_SYSCALL_TRACEPOINT 6 /* syscall tracepoint instrumentation */ | |
145 | #define TIF_SECCOMP 7 /* seccomp syscall filtering active */ | |
146 | ||
b0088480 | 147 | #define TIF_NOHZ 12 /* in adaptive nohz mode */ |
1da177e4 | 148 | #define TIF_USING_IWMMXT 17 |
0ddc9324 | 149 | #define TIF_MEMDIE 18 /* is terminating due to OOM killer */ |
36984265 | 150 | #define TIF_RESTORE_SIGMASK 20 |
1da177e4 | 151 | |
1da177e4 LT |
152 | #define _TIF_SIGPENDING (1 << TIF_SIGPENDING) |
153 | #define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED) | |
d0420c83 | 154 | #define _TIF_NOTIFY_RESUME (1 << TIF_NOTIFY_RESUME) |
c7edc9e3 | 155 | #define _TIF_UPROBE (1 << TIF_UPROBE) |
1da177e4 | 156 | #define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE) |
29ef73b7 | 157 | #define _TIF_SYSCALL_AUDIT (1 << TIF_SYSCALL_AUDIT) |
1f66e06f | 158 | #define _TIF_SYSCALL_TRACEPOINT (1 << TIF_SYSCALL_TRACEPOINT) |
70c70d97 | 159 | #define _TIF_SECCOMP (1 << TIF_SECCOMP) |
9b790d71 | 160 | #define _TIF_USING_IWMMXT (1 << TIF_USING_IWMMXT) |
1da177e4 | 161 | |
29ef73b7 | 162 | /* Checks for any syscall work in entry-common.S */ |
9b790d71 KC |
163 | #define _TIF_SYSCALL_WORK (_TIF_SYSCALL_TRACE | _TIF_SYSCALL_AUDIT | \ |
164 | _TIF_SYSCALL_TRACEPOINT | _TIF_SECCOMP) | |
29ef73b7 | 165 | |
1da177e4 LT |
166 | /* |
167 | * Change these and you break ASM code in entry-common.S | |
168 | */ | |
c7edc9e3 DL |
169 | #define _TIF_WORK_MASK (_TIF_NEED_RESCHED | _TIF_SIGPENDING | \ |
170 | _TIF_NOTIFY_RESUME | _TIF_UPROBE) | |
1da177e4 LT |
171 | |
172 | #endif /* __KERNEL__ */ | |
173 | #endif /* __ASM_ARM_THREAD_INFO_H */ |