bury _TIF_RESTORE_SIGMASK
[linux-3.10.git] / arch / unicore32 / include / asm / thread_info.h
1 /*
2  * linux/arch/unicore32/include/asm/thread_info.h
3  *
4  * Code specific to PKUnity SoC and UniCore ISA
5  *
6  * Copyright (C) 2001-2010 GUAN Xue-tao
7  *
8  * This program is free software; you can redistribute it and/or modify
9  * it under the terms of the GNU General Public License version 2 as
10  * published by the Free Software Foundation.
11  */
12 #ifndef __UNICORE_THREAD_INFO_H__
13 #define __UNICORE_THREAD_INFO_H__
14
15 #ifdef __KERNEL__
16
17 #include <linux/compiler.h>
18 #include <asm/fpstate.h>
19
20 #define THREAD_SIZE_ORDER       1
21 #define THREAD_SIZE             8192
22 #define THREAD_START_SP         (THREAD_SIZE - 8)
23
24 #ifndef __ASSEMBLY__
25
26 struct task_struct;
27 struct exec_domain;
28
29 #include <asm/types.h>
30
31 typedef struct {
32         unsigned long seg;
33 } mm_segment_t;
34
35 struct cpu_context_save {
36         __u32   r4;
37         __u32   r5;
38         __u32   r6;
39         __u32   r7;
40         __u32   r8;
41         __u32   r9;
42         __u32   r10;
43         __u32   r11;
44         __u32   r12;
45         __u32   r13;
46         __u32   r14;
47         __u32   r15;
48         __u32   r16;
49         __u32   r17;
50         __u32   r18;
51         __u32   r19;
52         __u32   r20;
53         __u32   r21;
54         __u32   r22;
55         __u32   r23;
56         __u32   r24;
57         __u32   r25;
58         __u32   r26;
59         __u32   fp;
60         __u32   sp;
61         __u32   pc;
62 };
63
64 /*
65  * low level task data that entry.S needs immediate access to.
66  * __switch_to() assumes cpu_context follows immediately after cpu_domain.
67  */
68 struct thread_info {
69         unsigned long           flags;          /* low level flags */
70         int                     preempt_count;  /* 0 => preemptable */
71                                                 /* <0 => bug */
72         mm_segment_t            addr_limit;     /* address limit */
73         struct task_struct      *task;          /* main task structure */
74         struct exec_domain      *exec_domain;   /* execution domain */
75         __u32                   cpu;            /* cpu */
76         struct cpu_context_save cpu_context;    /* cpu context */
77         __u32                   syscall;        /* syscall number */
78         __u8                    used_cp[16];    /* thread used copro */
79 #ifdef CONFIG_UNICORE_FPU_F64
80         struct fp_state         fpstate __attribute__((aligned(8)));
81 #endif
82         struct restart_block    restart_block;
83 };
84
85 #define INIT_THREAD_INFO(tsk)                                           \
86 {                                                                       \
87         .task           = &tsk,                                         \
88         .exec_domain    = &default_exec_domain,                         \
89         .flags          = 0,                                            \
90         .preempt_count  = INIT_PREEMPT_COUNT,                           \
91         .addr_limit     = KERNEL_DS,                                    \
92         .restart_block  = {                                             \
93                 .fn     = do_no_restart_syscall,                        \
94         },                                                              \
95 }
96
97 #define init_thread_info        (init_thread_union.thread_info)
98 #define init_stack              (init_thread_union.stack)
99
100 /*
101  * how to get the thread information struct from C
102  */
103 static inline struct thread_info *current_thread_info(void) __attribute_const__;
104
105 static inline struct thread_info *current_thread_info(void)
106 {
107         register unsigned long sp asm ("sp");
108         return (struct thread_info *)(sp & ~(THREAD_SIZE - 1));
109 }
110
111 #define thread_saved_pc(tsk)    \
112         ((unsigned long)(task_thread_info(tsk)->cpu_context.pc))
113 #define thread_saved_sp(tsk)    \
114         ((unsigned long)(task_thread_info(tsk)->cpu_context.sp))
115 #define thread_saved_fp(tsk)    \
116         ((unsigned long)(task_thread_info(tsk)->cpu_context.fp))
117
118 #endif
119
120 /*
121  * We use bit 30 of the preempt_count to indicate that kernel
122  * preemption is occurring.  See <asm/hardirq.h>.
123  */
124 #define PREEMPT_ACTIVE  0x40000000
125
126 /*
127  * thread information flags:
128  *  TIF_SYSCALL_TRACE   - syscall trace active
129  *  TIF_SIGPENDING      - signal pending
130  *  TIF_NEED_RESCHED    - rescheduling necessary
131  *  TIF_NOTIFY_RESUME   - callback before returning to user
132  */
133 #define TIF_SIGPENDING          0
134 #define TIF_NEED_RESCHED        1
135 #define TIF_NOTIFY_RESUME       2       /* callback before returning to user */
136 #define TIF_SYSCALL_TRACE       8
137 #define TIF_MEMDIE              18
138 #define TIF_RESTORE_SIGMASK     20
139
140 #define _TIF_SIGPENDING         (1 << TIF_SIGPENDING)
141 #define _TIF_NEED_RESCHED       (1 << TIF_NEED_RESCHED)
142 #define _TIF_NOTIFY_RESUME      (1 << TIF_NOTIFY_RESUME)
143 #define _TIF_SYSCALL_TRACE      (1 << TIF_SYSCALL_TRACE)
144
145 /*
146  * Change these and you break ASM code in entry-common.S
147  */
148 #define _TIF_WORK_MASK \
149         (_TIF_SIGPENDING | _TIF_NEED_RESCHED | _TIF_NOTIFY_RESUME)
150
151 #endif /* __KERNEL__ */
152 #endif /* __UNICORE_THREAD_INFO_H__ */