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 LT |
16 | #include <asm/fpstate.h> |
17 | ||
4f7a1812 RK |
18 | #define THREAD_SIZE_ORDER 1 |
19 | #define THREAD_SIZE 8192 | |
20 | #define THREAD_START_SP (THREAD_SIZE - 8) | |
21 | ||
1da177e4 LT |
22 | #ifndef __ASSEMBLY__ |
23 | ||
24 | struct task_struct; | |
25 | struct exec_domain; | |
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 */ | |
55 | struct exec_domain *exec_domain; /* execution domain */ | |
56 | __u32 cpu; /* cpu */ | |
57 | __u32 cpu_domain; /* cpu domain */ | |
58 | struct cpu_context_save cpu_context; /* cpu context */ | |
5ba6d3fe | 59 | __u32 syscall; /* syscall number */ |
1da177e4 LT |
60 | __u8 used_cp[16]; /* thread used copro */ |
61 | unsigned long tp_value; | |
c17fad11 | 62 | struct crunch_state crunchstate; |
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 | struct restart_block restart_block; |
69 | }; | |
70 | ||
71 | #define INIT_THREAD_INFO(tsk) \ | |
72 | { \ | |
73 | .task = &tsk, \ | |
74 | .exec_domain = &default_exec_domain, \ | |
75 | .flags = 0, \ | |
c99e6efe | 76 | .preempt_count = INIT_PREEMPT_COUNT, \ |
1da177e4 LT |
77 | .addr_limit = KERNEL_DS, \ |
78 | .cpu_domain = domain_val(DOMAIN_USER, DOMAIN_MANAGER) | \ | |
79 | domain_val(DOMAIN_KERNEL, DOMAIN_MANAGER) | \ | |
80 | domain_val(DOMAIN_IO, DOMAIN_CLIENT), \ | |
81 | .restart_block = { \ | |
82 | .fn = do_no_restart_syscall, \ | |
83 | }, \ | |
84 | } | |
85 | ||
86 | #define init_thread_info (init_thread_union.thread_info) | |
87 | #define init_stack (init_thread_union.stack) | |
88 | ||
1da177e4 LT |
89 | /* |
90 | * how to get the thread information struct from C | |
91 | */ | |
92 | static inline struct thread_info *current_thread_info(void) __attribute_const__; | |
93 | ||
94 | static inline struct thread_info *current_thread_info(void) | |
95 | { | |
96 | register unsigned long sp asm ("sp"); | |
97 | return (struct thread_info *)(sp & ~(THREAD_SIZE - 1)); | |
98 | } | |
99 | ||
1da177e4 | 100 | #define thread_saved_pc(tsk) \ |
1de765c1 | 101 | ((unsigned long)(task_thread_info(tsk)->cpu_context.pc)) |
2d7c11bf CM |
102 | #define thread_saved_sp(tsk) \ |
103 | ((unsigned long)(task_thread_info(tsk)->cpu_context.sp)) | |
1da177e4 | 104 | #define thread_saved_fp(tsk) \ |
e7c1b32f | 105 | ((unsigned long)(task_thread_info(tsk)->cpu_context.fp)) |
1da177e4 | 106 | |
c17fad11 LB |
107 | extern void crunch_task_disable(struct thread_info *); |
108 | extern void crunch_task_copy(struct thread_info *, void *); | |
109 | extern void crunch_task_restore(struct thread_info *, void *); | |
110 | extern void crunch_task_release(struct thread_info *); | |
111 | ||
1da177e4 LT |
112 | extern void iwmmxt_task_disable(struct thread_info *); |
113 | extern void iwmmxt_task_copy(struct thread_info *, void *); | |
114 | extern void iwmmxt_task_restore(struct thread_info *, void *); | |
115 | extern void iwmmxt_task_release(struct thread_info *); | |
ae95bfbb | 116 | extern void iwmmxt_task_switch(struct thread_info *); |
1da177e4 | 117 | |
ad187f95 RK |
118 | extern void vfp_sync_hwstate(struct thread_info *); |
119 | extern void vfp_flush_hwstate(struct thread_info *); | |
3d1228ea | 120 | |
2498814f WD |
121 | struct user_vfp; |
122 | struct user_vfp_exc; | |
123 | ||
124 | extern int vfp_preserve_user_clear_hwstate(struct user_vfp __user *, | |
125 | struct user_vfp_exc __user *); | |
126 | extern int vfp_restore_user_hwstate(struct user_vfp __user *, | |
127 | struct user_vfp_exc __user *); | |
1da177e4 LT |
128 | #endif |
129 | ||
130 | /* | |
131 | * We use bit 30 of the preempt_count to indicate that kernel | |
4baa9922 | 132 | * preemption is occurring. See <asm/hardirq.h>. |
1da177e4 LT |
133 | */ |
134 | #define PREEMPT_ACTIVE 0x40000000 | |
135 | ||
136 | /* | |
137 | * thread information flags: | |
138 | * TIF_SYSCALL_TRACE - syscall trace active | |
29ef73b7 | 139 | * TIF_SYSCAL_AUDIT - syscall auditing active |
1da177e4 LT |
140 | * TIF_SIGPENDING - signal pending |
141 | * TIF_NEED_RESCHED - rescheduling necessary | |
d0420c83 | 142 | * TIF_NOTIFY_RESUME - callback before returning to user |
1da177e4 LT |
143 | * TIF_USEDFPU - FPU was used by this task this quantum (SMP) |
144 | * TIF_POLLING_NRFLAG - true if poll_idle() is polling TIF_NEED_RESCHED | |
145 | */ | |
a583f1b5 SE |
146 | #define TIF_SIGPENDING 0 |
147 | #define TIF_NEED_RESCHED 1 | |
d0420c83 | 148 | #define TIF_NOTIFY_RESUME 2 /* callback before returning to user */ |
1da177e4 | 149 | #define TIF_SYSCALL_TRACE 8 |
29ef73b7 | 150 | #define TIF_SYSCALL_AUDIT 9 |
1da177e4 LT |
151 | #define TIF_POLLING_NRFLAG 16 |
152 | #define TIF_USING_IWMMXT 17 | |
0ddc9324 | 153 | #define TIF_MEMDIE 18 /* is terminating due to OOM killer */ |
36984265 | 154 | #define TIF_RESTORE_SIGMASK 20 |
70c70d97 | 155 | #define TIF_SECCOMP 21 |
7fec1b57 | 156 | #define TIF_SWITCH_MM 22 /* deferred switch_mm */ |
1da177e4 | 157 | |
1da177e4 LT |
158 | #define _TIF_SIGPENDING (1 << TIF_SIGPENDING) |
159 | #define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED) | |
d0420c83 | 160 | #define _TIF_NOTIFY_RESUME (1 << TIF_NOTIFY_RESUME) |
1da177e4 | 161 | #define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE) |
29ef73b7 | 162 | #define _TIF_SYSCALL_AUDIT (1 << TIF_SYSCALL_AUDIT) |
1da177e4 LT |
163 | #define _TIF_POLLING_NRFLAG (1 << TIF_POLLING_NRFLAG) |
164 | #define _TIF_USING_IWMMXT (1 << TIF_USING_IWMMXT) | |
70c70d97 | 165 | #define _TIF_SECCOMP (1 << TIF_SECCOMP) |
1da177e4 | 166 | |
29ef73b7 | 167 | /* Checks for any syscall work in entry-common.S */ |
433e2f30 | 168 | #define _TIF_SYSCALL_WORK (_TIF_SYSCALL_TRACE | _TIF_SYSCALL_AUDIT) |
29ef73b7 | 169 | |
1da177e4 LT |
170 | /* |
171 | * Change these and you break ASM code in entry-common.S | |
172 | */ | |
84849b3e | 173 | #define _TIF_WORK_MASK (_TIF_NEED_RESCHED | _TIF_SIGPENDING | _TIF_NOTIFY_RESUME) |
1da177e4 LT |
174 | |
175 | #endif /* __KERNEL__ */ | |
176 | #endif /* __ASM_ARM_THREAD_INFO_H */ |