Commit | Line | Data |
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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 LT |
27 | #include <asm/types.h> |
28 | #include <asm/domain.h> | |
29 | ||
30 | typedef unsigned long mm_segment_t; | |
31 | ||
32 | struct cpu_context_save { | |
33 | __u32 r4; | |
34 | __u32 r5; | |
35 | __u32 r6; | |
36 | __u32 r7; | |
37 | __u32 r8; | |
38 | __u32 r9; | |
39 | __u32 sl; | |
40 | __u32 fp; | |
41 | __u32 sp; | |
42 | __u32 pc; | |
43 | __u32 extra[2]; /* Xscale 'acc' register, etc */ | |
44 | }; | |
45 | ||
46 | /* | |
47 | * low level task data that entry.S needs immediate access to. | |
48 | * __switch_to() assumes cpu_context follows immediately after cpu_domain. | |
49 | */ | |
50 | struct thread_info { | |
51 | unsigned long flags; /* low level flags */ | |
dcd497f9 | 52 | int preempt_count; /* 0 => preemptable, <0 => bug */ |
1da177e4 LT |
53 | mm_segment_t addr_limit; /* address limit */ |
54 | struct task_struct *task; /* main task structure */ | |
1da177e4 LT |
55 | __u32 cpu; /* cpu */ |
56 | __u32 cpu_domain; /* cpu domain */ | |
57 | struct cpu_context_save cpu_context; /* cpu context */ | |
5ba6d3fe | 58 | __u32 syscall; /* syscall number */ |
1da177e4 | 59 | __u8 used_cp[16]; /* thread used copro */ |
a4780ade | 60 | unsigned long tp_value[2]; /* TLS registers */ |
9fc31ddc | 61 | #ifdef CONFIG_CRUNCH |
c17fad11 | 62 | struct crunch_state crunchstate; |
9fc31ddc | 63 | #endif |
cdaabbd7 | 64 | union fp_state fpstate __attribute__((aligned(8))); |
1da177e4 | 65 | union vfp_state vfpstate; |
d7f864be CM |
66 | #ifdef CONFIG_ARM_THUMBEE |
67 | unsigned long thumbee_state; /* ThumbEE Handler Base register */ | |
68 | #endif | |
1da177e4 LT |
69 | }; |
70 | ||
71 | #define INIT_THREAD_INFO(tsk) \ | |
72 | { \ | |
73 | .task = &tsk, \ | |
1da177e4 | 74 | .flags = 0, \ |
c99e6efe | 75 | .preempt_count = INIT_PREEMPT_COUNT, \ |
1da177e4 LT |
76 | .addr_limit = KERNEL_DS, \ |
77 | .cpu_domain = domain_val(DOMAIN_USER, DOMAIN_MANAGER) | \ | |
78 | domain_val(DOMAIN_KERNEL, DOMAIN_MANAGER) | \ | |
79 | domain_val(DOMAIN_IO, DOMAIN_CLIENT), \ | |
1da177e4 LT |
80 | } |
81 | ||
82 | #define init_thread_info (init_thread_union.thread_info) | |
83 | #define init_stack (init_thread_union.stack) | |
84 | ||
0abc08ba BW |
85 | /* |
86 | * how to get the current stack pointer in C | |
87 | */ | |
88 | register unsigned long current_stack_pointer asm ("sp"); | |
89 | ||
1da177e4 LT |
90 | /* |
91 | * how to get the thread information struct from C | |
92 | */ | |
93 | static inline struct thread_info *current_thread_info(void) __attribute_const__; | |
94 | ||
95 | static inline struct thread_info *current_thread_info(void) | |
96 | { | |
f6c9cbf0 BW |
97 | return (struct thread_info *) |
98 | (current_stack_pointer & ~(THREAD_SIZE - 1)); | |
1da177e4 LT |
99 | } |
100 | ||
1da177e4 | 101 | #define thread_saved_pc(tsk) \ |
1de765c1 | 102 | ((unsigned long)(task_thread_info(tsk)->cpu_context.pc)) |
2d7c11bf CM |
103 | #define thread_saved_sp(tsk) \ |
104 | ((unsigned long)(task_thread_info(tsk)->cpu_context.sp)) | |
870cbe8c NB |
105 | |
106 | #ifndef CONFIG_THUMB2_KERNEL | |
1da177e4 | 107 | #define thread_saved_fp(tsk) \ |
e7c1b32f | 108 | ((unsigned long)(task_thread_info(tsk)->cpu_context.fp)) |
870cbe8c NB |
109 | #else |
110 | #define thread_saved_fp(tsk) \ | |
111 | ((unsigned long)(task_thread_info(tsk)->cpu_context.r7)) | |
112 | #endif | |
1da177e4 | 113 | |
c17fad11 LB |
114 | extern void crunch_task_disable(struct thread_info *); |
115 | extern void crunch_task_copy(struct thread_info *, void *); | |
116 | extern void crunch_task_restore(struct thread_info *, void *); | |
117 | extern void crunch_task_release(struct thread_info *); | |
118 | ||
1da177e4 LT |
119 | extern void iwmmxt_task_disable(struct thread_info *); |
120 | extern void iwmmxt_task_copy(struct thread_info *, void *); | |
121 | extern void iwmmxt_task_restore(struct thread_info *, void *); | |
122 | extern void iwmmxt_task_release(struct thread_info *); | |
ae95bfbb | 123 | extern void iwmmxt_task_switch(struct thread_info *); |
1da177e4 | 124 | |
ad187f95 RK |
125 | extern void vfp_sync_hwstate(struct thread_info *); |
126 | extern void vfp_flush_hwstate(struct thread_info *); | |
3d1228ea | 127 | |
2498814f WD |
128 | struct user_vfp; |
129 | struct user_vfp_exc; | |
130 | ||
131 | extern int vfp_preserve_user_clear_hwstate(struct user_vfp __user *, | |
132 | struct user_vfp_exc __user *); | |
133 | extern int vfp_restore_user_hwstate(struct user_vfp __user *, | |
134 | struct user_vfp_exc __user *); | |
1da177e4 LT |
135 | #endif |
136 | ||
1da177e4 LT |
137 | /* |
138 | * thread information flags: | |
139 | * TIF_SYSCALL_TRACE - syscall trace active | |
29ef73b7 | 140 | * TIF_SYSCAL_AUDIT - syscall auditing active |
1da177e4 LT |
141 | * TIF_SIGPENDING - signal pending |
142 | * TIF_NEED_RESCHED - rescheduling necessary | |
d0420c83 | 143 | * TIF_NOTIFY_RESUME - callback before returning to user |
1da177e4 LT |
144 | * TIF_USEDFPU - FPU was used by this task this quantum (SMP) |
145 | * TIF_POLLING_NRFLAG - true if poll_idle() is polling TIF_NEED_RESCHED | |
146 | */ | |
a583f1b5 SE |
147 | #define TIF_SIGPENDING 0 |
148 | #define TIF_NEED_RESCHED 1 | |
d0420c83 | 149 | #define TIF_NOTIFY_RESUME 2 /* callback before returning to user */ |
c7edc9e3 | 150 | #define TIF_UPROBE 7 |
1da177e4 | 151 | #define TIF_SYSCALL_TRACE 8 |
29ef73b7 | 152 | #define TIF_SYSCALL_AUDIT 9 |
1f66e06f | 153 | #define TIF_SYSCALL_TRACEPOINT 10 |
9b790d71 | 154 | #define TIF_SECCOMP 11 /* seccomp syscall filtering active */ |
b0088480 | 155 | #define TIF_NOHZ 12 /* in adaptive nohz mode */ |
1da177e4 | 156 | #define TIF_USING_IWMMXT 17 |
0ddc9324 | 157 | #define TIF_MEMDIE 18 /* is terminating due to OOM killer */ |
36984265 | 158 | #define TIF_RESTORE_SIGMASK 20 |
1da177e4 | 159 | |
1da177e4 LT |
160 | #define _TIF_SIGPENDING (1 << TIF_SIGPENDING) |
161 | #define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED) | |
d0420c83 | 162 | #define _TIF_NOTIFY_RESUME (1 << TIF_NOTIFY_RESUME) |
c7edc9e3 | 163 | #define _TIF_UPROBE (1 << TIF_UPROBE) |
1da177e4 | 164 | #define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE) |
29ef73b7 | 165 | #define _TIF_SYSCALL_AUDIT (1 << TIF_SYSCALL_AUDIT) |
1f66e06f | 166 | #define _TIF_SYSCALL_TRACEPOINT (1 << TIF_SYSCALL_TRACEPOINT) |
70c70d97 | 167 | #define _TIF_SECCOMP (1 << TIF_SECCOMP) |
9b790d71 | 168 | #define _TIF_USING_IWMMXT (1 << TIF_USING_IWMMXT) |
1da177e4 | 169 | |
29ef73b7 | 170 | /* Checks for any syscall work in entry-common.S */ |
9b790d71 KC |
171 | #define _TIF_SYSCALL_WORK (_TIF_SYSCALL_TRACE | _TIF_SYSCALL_AUDIT | \ |
172 | _TIF_SYSCALL_TRACEPOINT | _TIF_SECCOMP) | |
29ef73b7 | 173 | |
1da177e4 LT |
174 | /* |
175 | * Change these and you break ASM code in entry-common.S | |
176 | */ | |
c7edc9e3 DL |
177 | #define _TIF_WORK_MASK (_TIF_NEED_RESCHED | _TIF_SIGPENDING | \ |
178 | _TIF_NOTIFY_RESUME | _TIF_UPROBE) | |
1da177e4 LT |
179 | |
180 | #endif /* __KERNEL__ */ | |
181 | #endif /* __ASM_ARM_THREAD_INFO_H */ |