2 * arch/arm/include/asm/thread_info.h
4 * Copyright (C) 2002 Russell King.
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.
10 #ifndef __ASM_ARM_THREAD_INFO_H
11 #define __ASM_ARM_THREAD_INFO_H
15 #include <linux/compiler.h>
16 #include <asm/fpstate.h>
19 #define THREAD_SIZE_ORDER 1
20 #define THREAD_SIZE (PAGE_SIZE << THREAD_SIZE_ORDER)
21 #define THREAD_START_SP (THREAD_SIZE - 8)
28 #include <asm/types.h>
29 #include <asm/domain.h>
31 typedef unsigned long mm_segment_t
;
33 struct cpu_context_save
{
44 __u32 extra
[2]; /* Xscale 'acc' register, etc */
48 * low level task data that entry.S needs immediate access to.
49 * __switch_to() assumes cpu_context follows immediately after cpu_domain.
52 unsigned long flags
; /* low level flags */
53 int preempt_count
; /* 0 => preemptable, <0 => bug */
54 mm_segment_t addr_limit
; /* address limit */
55 struct task_struct
*task
; /* main task structure */
56 struct exec_domain
*exec_domain
; /* execution domain */
58 __u32 cpu_domain
; /* cpu domain */
59 struct cpu_context_save cpu_context
; /* cpu context */
60 __u32 syscall
; /* syscall number */
61 __u8 used_cp
[16]; /* thread used copro */
62 unsigned long tp_value
[2]; /* TLS registers */
64 struct crunch_state crunchstate
;
66 union fp_state fpstate
__attribute__((aligned(8)));
67 union vfp_state vfpstate
;
68 #ifdef CONFIG_ARM_THUMBEE
69 unsigned long thumbee_state
; /* ThumbEE Handler Base register */
71 struct restart_block restart_block
;
74 #define INIT_THREAD_INFO(tsk) \
77 .exec_domain = &default_exec_domain, \
79 .preempt_count = INIT_PREEMPT_COUNT, \
80 .addr_limit = KERNEL_DS, \
81 .cpu_domain = domain_val(DOMAIN_USER, DOMAIN_MANAGER) | \
82 domain_val(DOMAIN_KERNEL, DOMAIN_MANAGER) | \
83 domain_val(DOMAIN_IO, DOMAIN_CLIENT), \
85 .fn = do_no_restart_syscall, \
89 #define init_thread_info (init_thread_union.thread_info)
90 #define init_stack (init_thread_union.stack)
93 * how to get the current stack pointer in C
95 register unsigned long current_stack_pointer
asm ("sp");
98 * how to get the thread information struct from C
100 static inline struct thread_info
*current_thread_info(void) __attribute_const__
;
102 static inline struct thread_info
*current_thread_info(void)
104 return (struct thread_info
*)
105 (current_stack_pointer
& ~(THREAD_SIZE
- 1));
108 #define thread_saved_pc(tsk) \
109 ((unsigned long)(task_thread_info(tsk)->cpu_context.pc))
110 #define thread_saved_sp(tsk) \
111 ((unsigned long)(task_thread_info(tsk)->cpu_context.sp))
113 #ifndef CONFIG_THUMB2_KERNEL
114 #define thread_saved_fp(tsk) \
115 ((unsigned long)(task_thread_info(tsk)->cpu_context.fp))
117 #define thread_saved_fp(tsk) \
118 ((unsigned long)(task_thread_info(tsk)->cpu_context.r7))
121 extern void crunch_task_disable(struct thread_info
*);
122 extern void crunch_task_copy(struct thread_info
*, void *);
123 extern void crunch_task_restore(struct thread_info
*, void *);
124 extern void crunch_task_release(struct thread_info
*);
126 extern void iwmmxt_task_disable(struct thread_info
*);
127 extern void iwmmxt_task_copy(struct thread_info
*, void *);
128 extern void iwmmxt_task_restore(struct thread_info
*, void *);
129 extern void iwmmxt_task_release(struct thread_info
*);
130 extern void iwmmxt_task_switch(struct thread_info
*);
132 extern void vfp_sync_hwstate(struct thread_info
*);
133 extern void vfp_flush_hwstate(struct thread_info
*);
138 extern int vfp_preserve_user_clear_hwstate(struct user_vfp __user
*,
139 struct user_vfp_exc __user
*);
140 extern int vfp_restore_user_hwstate(struct user_vfp __user
*,
141 struct user_vfp_exc __user
*);
145 * thread information flags:
146 * TIF_SYSCALL_TRACE - syscall trace active
147 * TIF_SYSCAL_AUDIT - syscall auditing active
148 * TIF_SIGPENDING - signal pending
149 * TIF_NEED_RESCHED - rescheduling necessary
150 * TIF_NOTIFY_RESUME - callback before returning to user
151 * TIF_USEDFPU - FPU was used by this task this quantum (SMP)
152 * TIF_POLLING_NRFLAG - true if poll_idle() is polling TIF_NEED_RESCHED
154 #define TIF_SIGPENDING 0
155 #define TIF_NEED_RESCHED 1
156 #define TIF_NOTIFY_RESUME 2 /* callback before returning to user */
158 #define TIF_SYSCALL_TRACE 8
159 #define TIF_SYSCALL_AUDIT 9
160 #define TIF_SYSCALL_TRACEPOINT 10
161 #define TIF_SECCOMP 11 /* seccomp syscall filtering active */
162 #define TIF_NOHZ 12 /* in adaptive nohz mode */
163 #define TIF_USING_IWMMXT 17
164 #define TIF_MEMDIE 18 /* is terminating due to OOM killer */
165 #define TIF_RESTORE_SIGMASK 20
167 #define _TIF_SIGPENDING (1 << TIF_SIGPENDING)
168 #define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED)
169 #define _TIF_NOTIFY_RESUME (1 << TIF_NOTIFY_RESUME)
170 #define _TIF_UPROBE (1 << TIF_UPROBE)
171 #define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE)
172 #define _TIF_SYSCALL_AUDIT (1 << TIF_SYSCALL_AUDIT)
173 #define _TIF_SYSCALL_TRACEPOINT (1 << TIF_SYSCALL_TRACEPOINT)
174 #define _TIF_SECCOMP (1 << TIF_SECCOMP)
175 #define _TIF_USING_IWMMXT (1 << TIF_USING_IWMMXT)
177 /* Checks for any syscall work in entry-common.S */
178 #define _TIF_SYSCALL_WORK (_TIF_SYSCALL_TRACE | _TIF_SYSCALL_AUDIT | \
179 _TIF_SYSCALL_TRACEPOINT | _TIF_SECCOMP)
182 * Change these and you break ASM code in entry-common.S
184 #define _TIF_WORK_MASK (_TIF_NEED_RESCHED | _TIF_SIGPENDING | \
185 _TIF_NOTIFY_RESUME | _TIF_UPROBE)
187 #endif /* __KERNEL__ */
188 #endif /* __ASM_ARM_THREAD_INFO_H */