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 */
47 * low level task data that entry.S needs immediate access to.
48 * __switch_to() assumes cpu_context follows immediately after cpu_domain.
51 unsigned long flags
; /* low level flags */
52 int preempt_count
; /* 0 => preemptable, <0 => bug */
53 mm_segment_t addr_limit
; /* address limit */
54 struct task_struct
*task
; /* main task structure */
55 struct exec_domain
*exec_domain
; /* execution domain */
57 __u32 cpu_domain
; /* cpu domain */
58 struct cpu_context_save cpu_context
; /* cpu context */
59 __u32 syscall
; /* syscall number */
60 __u8 used_cp
[16]; /* thread used copro */
61 unsigned long tp_value
;
62 struct crunch_state crunchstate
;
63 union fp_state fpstate
__attribute__((aligned(8)));
64 union vfp_state vfpstate
;
65 #ifdef CONFIG_ARM_THUMBEE
66 unsigned long thumbee_state
; /* ThumbEE Handler Base register */
68 struct restart_block restart_block
;
71 #define INIT_THREAD_INFO(tsk) \
74 .exec_domain = &default_exec_domain, \
76 .preempt_count = INIT_PREEMPT_COUNT, \
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), \
82 .fn = do_no_restart_syscall, \
86 #define init_thread_info (init_thread_union.thread_info)
87 #define init_stack (init_thread_union.stack)
90 * how to get the thread information struct from C
92 static inline struct thread_info
*current_thread_info(void) __attribute_const__
;
94 static inline struct thread_info
*current_thread_info(void)
96 register unsigned long sp
asm ("sp");
97 return (struct thread_info
*)(sp
& ~(THREAD_SIZE
- 1));
100 #define thread_saved_pc(tsk) \
101 ((unsigned long)(task_thread_info(tsk)->cpu_context.pc))
102 #define thread_saved_sp(tsk) \
103 ((unsigned long)(task_thread_info(tsk)->cpu_context.sp))
104 #define thread_saved_fp(tsk) \
105 ((unsigned long)(task_thread_info(tsk)->cpu_context.fp))
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
*);
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
*);
116 extern void iwmmxt_task_switch(struct thread_info
*);
118 extern void vfp_sync_hwstate(struct thread_info
*);
119 extern void vfp_flush_hwstate(struct thread_info
*);
124 * We use bit 30 of the preempt_count to indicate that kernel
125 * preemption is occurring. See <asm/hardirq.h>.
127 #define PREEMPT_ACTIVE 0x40000000
130 * thread information flags:
131 * TIF_SYSCALL_TRACE - syscall trace active
132 * TIF_SIGPENDING - signal pending
133 * TIF_NEED_RESCHED - rescheduling necessary
134 * TIF_NOTIFY_RESUME - callback before returning to user
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
138 #define TIF_SIGPENDING 0
139 #define TIF_NEED_RESCHED 1
140 #define TIF_NOTIFY_RESUME 2 /* callback before returning to user */
141 #define TIF_SYSCALL_TRACE 8
142 #define TIF_POLLING_NRFLAG 16
143 #define TIF_USING_IWMMXT 17
144 #define TIF_MEMDIE 18 /* is terminating due to OOM killer */
145 #define TIF_FREEZE 19
146 #define TIF_RESTORE_SIGMASK 20
147 #define TIF_SECCOMP 21
149 #define _TIF_SIGPENDING (1 << TIF_SIGPENDING)
150 #define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED)
151 #define _TIF_NOTIFY_RESUME (1 << TIF_NOTIFY_RESUME)
152 #define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE)
153 #define _TIF_POLLING_NRFLAG (1 << TIF_POLLING_NRFLAG)
154 #define _TIF_USING_IWMMXT (1 << TIF_USING_IWMMXT)
155 #define _TIF_FREEZE (1 << TIF_FREEZE)
156 #define _TIF_RESTORE_SIGMASK (1 << TIF_RESTORE_SIGMASK)
157 #define _TIF_SECCOMP (1 << TIF_SECCOMP)
160 * Change these and you break ASM code in entry-common.S
162 #define _TIF_WORK_MASK 0x000000ff
164 #endif /* __KERNEL__ */
165 #endif /* __ASM_ARM_THREAD_INFO_H */