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>
18 #define THREAD_SIZE_ORDER 1
19 #define THREAD_SIZE 8192
20 #define THREAD_START_SP (THREAD_SIZE - 8)
27 #include <asm/types.h>
28 #include <asm/domain.h>
30 typedef unsigned long mm_segment_t;
32 struct cpu_context_save {
43 __u32 extra[2]; /* Xscale 'acc' register, etc */
46 struct arm_restart_block {
48 /* For user cache flushing */
57 * low level task data that entry.S needs immediate access to.
58 * __switch_to() assumes cpu_context follows immediately after cpu_domain.
61 unsigned long flags; /* low level flags */
62 int preempt_count; /* 0 => preemptable, <0 => bug */
63 mm_segment_t addr_limit; /* address limit */
64 struct task_struct *task; /* main task structure */
65 struct exec_domain *exec_domain; /* execution domain */
67 __u32 cpu_domain; /* cpu domain */
68 struct cpu_context_save cpu_context; /* cpu context */
69 __u32 syscall; /* syscall number */
70 __u8 used_cp[16]; /* thread used copro */
71 unsigned long tp_value[2]; /* TLS registers */
73 struct crunch_state crunchstate;
75 union fp_state fpstate __attribute__((aligned(8)));
76 union vfp_state vfpstate;
77 #ifdef CONFIG_ARM_THUMBEE
78 unsigned long thumbee_state; /* ThumbEE Handler Base register */
80 struct restart_block restart_block;
81 struct arm_restart_block arm_restart_block;
84 #define INIT_THREAD_INFO(tsk) \
87 .exec_domain = &default_exec_domain, \
89 .preempt_count = INIT_PREEMPT_COUNT, \
90 .addr_limit = KERNEL_DS, \
91 .cpu_domain = domain_val(DOMAIN_USER, DOMAIN_MANAGER) | \
92 domain_val(DOMAIN_KERNEL, DOMAIN_MANAGER) | \
93 domain_val(DOMAIN_IO, DOMAIN_CLIENT), \
95 .fn = do_no_restart_syscall, \
99 #define init_thread_info (init_thread_union.thread_info)
100 #define init_stack (init_thread_union.stack)
103 * how to get the thread information struct from C
105 static inline struct thread_info *current_thread_info(void) __attribute_const__;
107 static inline struct thread_info *current_thread_info(void)
109 register unsigned long sp asm ("sp");
110 return (struct thread_info *)(sp & ~(THREAD_SIZE - 1));
113 #define thread_saved_pc(tsk) \
114 ((unsigned long)(task_thread_info(tsk)->cpu_context.pc))
115 #define thread_saved_sp(tsk) \
116 ((unsigned long)(task_thread_info(tsk)->cpu_context.sp))
117 #define thread_saved_fp(tsk) \
118 ((unsigned long)(task_thread_info(tsk)->cpu_context.fp))
120 extern void crunch_task_disable(struct thread_info *);
121 extern void crunch_task_copy(struct thread_info *, void *);
122 extern void crunch_task_restore(struct thread_info *, void *);
123 extern void crunch_task_release(struct thread_info *);
125 extern void iwmmxt_task_disable(struct thread_info *);
126 extern void iwmmxt_task_copy(struct thread_info *, void *);
127 extern void iwmmxt_task_restore(struct thread_info *, void *);
128 extern void iwmmxt_task_release(struct thread_info *);
129 extern void iwmmxt_task_switch(struct thread_info *);
131 extern void vfp_sync_hwstate(struct thread_info *);
132 extern void vfp_flush_hwstate(struct thread_info *);
137 extern int vfp_preserve_user_clear_hwstate(struct user_vfp __user *,
138 struct user_vfp_exc __user *);
139 extern int vfp_restore_user_hwstate(struct user_vfp __user *,
140 struct user_vfp_exc __user *);
144 * thread information flags:
145 * TIF_SYSCALL_TRACE - syscall trace active
146 * TIF_SYSCAL_AUDIT - syscall auditing active
147 * TIF_SIGPENDING - signal pending
148 * TIF_NEED_RESCHED - rescheduling necessary
149 * TIF_NOTIFY_RESUME - callback before returning to user
150 * TIF_USEDFPU - FPU was used by this task this quantum (SMP)
151 * TIF_POLLING_NRFLAG - true if poll_idle() is polling TIF_NEED_RESCHED
153 #define TIF_SIGPENDING 0
154 #define TIF_NEED_RESCHED 1
155 #define TIF_NOTIFY_RESUME 2 /* callback before returning to user */
156 #define TIF_SYSCALL_TRACE 8
157 #define TIF_SYSCALL_AUDIT 9
158 #define TIF_SYSCALL_TRACEPOINT 10
159 #define TIF_SECCOMP 11 /* seccomp syscall filtering active */
160 #define TIF_NOHZ 12 /* in adaptive nohz mode */
161 #define TIF_USING_IWMMXT 17
162 #define TIF_MEMDIE 18 /* is terminating due to OOM killer */
163 #define TIF_RESTORE_SIGMASK 20
165 #define _TIF_SIGPENDING (1 << TIF_SIGPENDING)
166 #define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED)
167 #define _TIF_NOTIFY_RESUME (1 << TIF_NOTIFY_RESUME)
168 #define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE)
169 #define _TIF_SYSCALL_AUDIT (1 << TIF_SYSCALL_AUDIT)
170 #define _TIF_SYSCALL_TRACEPOINT (1 << TIF_SYSCALL_TRACEPOINT)
171 #define _TIF_SECCOMP (1 << TIF_SECCOMP)
172 #define _TIF_USING_IWMMXT (1 << TIF_USING_IWMMXT)
174 /* Checks for any syscall work in entry-common.S */
175 #define _TIF_SYSCALL_WORK (_TIF_SYSCALL_TRACE | _TIF_SYSCALL_AUDIT | \
176 _TIF_SYSCALL_TRACEPOINT | _TIF_SECCOMP)
179 * Change these and you break ASM code in entry-common.S
181 #define _TIF_WORK_MASK (_TIF_NEED_RESCHED | _TIF_SIGPENDING | _TIF_NOTIFY_RESUME)
183 #endif /* __KERNEL__ */
184 #endif /* __ASM_ARM_THREAD_INFO_H */