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1da177e4 LT |
1 | #ifndef __ASM_SH_THREAD_INFO_H |
2 | #define __ASM_SH_THREAD_INFO_H | |
3 | ||
4 | /* SuperH version | |
5 | * Copyright (C) 2002 Niibe Yutaka | |
6 | * | |
7 | * The copyright of original i386 version is: | |
8 | * | |
9 | * Copyright (C) 2002 David Howells (dhowells@redhat.com) | |
10 | * - Incorporating suggestions made by Linus Torvalds and Dave Miller | |
11 | */ | |
1da177e4 | 12 | #ifdef __KERNEL__ |
a6a31139 | 13 | #include <asm/page.h> |
1da177e4 LT |
14 | |
15 | #ifndef __ASSEMBLY__ | |
16 | #include <asm/processor.h> | |
17 | ||
18 | struct thread_info { | |
19 | struct task_struct *task; /* main task structure */ | |
20 | struct exec_domain *exec_domain; /* execution domain */ | |
6ecf66ae | 21 | unsigned long flags; /* low level flags */ |
56bfc42f | 22 | __u32 status; /* thread synchronous flags */ |
1da177e4 | 23 | __u32 cpu; |
dcd497f9 | 24 | int preempt_count; /* 0 => preemptable, <0 => BUG */ |
2991be72 | 25 | mm_segment_t addr_limit; /* thread address space */ |
1da177e4 | 26 | struct restart_block restart_block; |
a6a31139 PM |
27 | unsigned long previous_sp; /* sp of previous stack in case |
28 | of nested IRQ stacks */ | |
1da177e4 LT |
29 | __u8 supervisor_stack[0]; |
30 | }; | |
31 | ||
32 | #endif | |
33 | ||
37053cc8 | 34 | #define PREEMPT_ACTIVE 0x10000000 |
a6a31139 | 35 | |
7a847f81 | 36 | #if defined(CONFIG_4KSTACKS) |
c15c5f8c | 37 | #define THREAD_SHIFT 12 |
a6a31139 | 38 | #else |
c15c5f8c | 39 | #define THREAD_SHIFT 13 |
a6a31139 | 40 | #endif |
7a847f81 | 41 | |
c15c5f8c | 42 | #define THREAD_SIZE (1 << THREAD_SHIFT) |
7a847f81 | 43 | #define STACK_WARN (THREAD_SIZE >> 3) |
1da177e4 LT |
44 | |
45 | /* | |
46 | * macros/functions for gaining access to the thread information structure | |
47 | */ | |
48 | #ifndef __ASSEMBLY__ | |
49 | #define INIT_THREAD_INFO(tsk) \ | |
50 | { \ | |
51 | .task = &tsk, \ | |
52 | .exec_domain = &default_exec_domain, \ | |
53 | .flags = 0, \ | |
d3ea9fa0 | 54 | .status = 0, \ |
1da177e4 | 55 | .cpu = 0, \ |
c99e6efe | 56 | .preempt_count = INIT_PREEMPT_COUNT, \ |
2991be72 | 57 | .addr_limit = KERNEL_DS, \ |
1da177e4 LT |
58 | .restart_block = { \ |
59 | .fn = do_no_restart_syscall, \ | |
60 | }, \ | |
61 | } | |
62 | ||
63 | #define init_thread_info (init_thread_union.thread_info) | |
64 | #define init_stack (init_thread_union.stack) | |
65 | ||
a6a31139 | 66 | /* how to get the current stack pointer from C */ |
3ff6eecc | 67 | register unsigned long current_stack_pointer asm("r15") __used; |
a6a31139 | 68 | |
1da177e4 LT |
69 | /* how to get the thread information struct from C */ |
70 | static inline struct thread_info *current_thread_info(void) | |
71 | { | |
72 | struct thread_info *ti; | |
114f1329 PM |
73 | #if defined(CONFIG_SUPERH64) |
74 | __asm__ __volatile__ ("getcon cr17, %0" : "=r" (ti)); | |
75 | #elif defined(CONFIG_CPU_HAS_SR_RB) | |
76 | __asm__ __volatile__ ("stc r7_bank, %0" : "=r" (ti)); | |
f1517494 PM |
77 | #else |
78 | unsigned long __dummy; | |
79 | ||
80 | __asm__ __volatile__ ( | |
81 | "mov r15, %0\n\t" | |
82 | "and %1, %0\n\t" | |
83 | : "=&r" (ti), "=r" (__dummy) | |
84 | : "1" (~(THREAD_SIZE - 1)) | |
85 | : "memory"); | |
86 | #endif | |
87 | ||
1da177e4 LT |
88 | return ti; |
89 | } | |
90 | ||
c15c5f8c PM |
91 | /* thread information allocation */ |
92 | #if THREAD_SHIFT >= PAGE_SHIFT | |
93 | ||
94 | #define THREAD_SIZE_ORDER (THREAD_SHIFT - PAGE_SHIFT) | |
95 | ||
cbf6b1ba | 96 | #endif |
b69c49b7 | 97 | |
c15c5f8c PM |
98 | extern struct thread_info *alloc_thread_info(struct task_struct *tsk); |
99 | extern void free_thread_info(struct thread_info *ti); | |
0ea820cf PM |
100 | extern void arch_task_cache_init(void); |
101 | #define arch_task_cache_init arch_task_cache_init | |
102 | extern int arch_dup_task_struct(struct task_struct *dst, struct task_struct *src); | |
103 | extern void init_thread_xstate(void); | |
c652d780 | 104 | |
cbf6b1ba | 105 | #define __HAVE_ARCH_THREAD_INFO_ALLOCATOR |
1da177e4 | 106 | |
510c72ad | 107 | #endif /* __ASSEMBLY__ */ |
1da177e4 LT |
108 | |
109 | /* | |
110 | * thread information flags | |
111 | * - these are process state flags that various assembly files may need to access | |
112 | * - pending work-to-be-done flags are in LSW | |
113 | * - other flags in MSW | |
114 | */ | |
115 | #define TIF_SYSCALL_TRACE 0 /* syscall trace active */ | |
a583f1b5 SE |
116 | #define TIF_SIGPENDING 1 /* signal pending */ |
117 | #define TIF_NEED_RESCHED 2 /* rescheduling necessary */ | |
a583f1b5 | 118 | #define TIF_SINGLESTEP 4 /* singlestepping active */ |
c4637d47 PM |
119 | #define TIF_SYSCALL_AUDIT 5 /* syscall auditing active */ |
120 | #define TIF_SECCOMP 6 /* secure computing */ | |
ab99c733 | 121 | #define TIF_NOTIFY_RESUME 7 /* callback before returning to user */ |
a74f7e04 | 122 | #define TIF_SYSCALL_TRACEPOINT 8 /* for ftrace syscall instrumentation */ |
1da177e4 LT |
123 | #define TIF_POLLING_NRFLAG 17 /* true if poll_idle() is polling TIF_NEED_RESCHED */ |
124 | #define TIF_MEMDIE 18 | |
ab99c733 | 125 | #define TIF_FREEZE 19 /* Freezing for suspend */ |
1da177e4 | 126 | |
cec3fd3e PM |
127 | #define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE) |
128 | #define _TIF_SIGPENDING (1 << TIF_SIGPENDING) | |
129 | #define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED) | |
cec3fd3e PM |
130 | #define _TIF_SINGLESTEP (1 << TIF_SINGLESTEP) |
131 | #define _TIF_SYSCALL_AUDIT (1 << TIF_SYSCALL_AUDIT) | |
c4637d47 | 132 | #define _TIF_SECCOMP (1 << TIF_SECCOMP) |
ab99c733 | 133 | #define _TIF_NOTIFY_RESUME (1 << TIF_NOTIFY_RESUME) |
a74f7e04 | 134 | #define _TIF_SYSCALL_TRACEPOINT (1 << TIF_SYSCALL_TRACEPOINT) |
cec3fd3e PM |
135 | #define _TIF_POLLING_NRFLAG (1 << TIF_POLLING_NRFLAG) |
136 | #define _TIF_FREEZE (1 << TIF_FREEZE) | |
137 | ||
138 | /* | |
c652d780 | 139 | * _TIF_ALLWORK_MASK and _TIF_WORK_MASK need to fit within 2 bytes, or we |
cec3fd3e PM |
140 | * blow the tst immediate size constraints and need to fix up |
141 | * arch/sh/kernel/entry-common.S. | |
142 | */ | |
143 | ||
144 | /* work to do in syscall trace */ | |
145 | #define _TIF_WORK_SYSCALL_MASK (_TIF_SYSCALL_TRACE | _TIF_SINGLESTEP | \ | |
c652d780 | 146 | _TIF_SYSCALL_AUDIT | _TIF_SECCOMP | \ |
a74f7e04 | 147 | _TIF_SYSCALL_TRACEPOINT) |
cec3fd3e PM |
148 | |
149 | /* work to do on any return to u-space */ | |
ab99c733 PM |
150 | #define _TIF_ALLWORK_MASK (_TIF_SYSCALL_TRACE | _TIF_SIGPENDING | \ |
151 | _TIF_NEED_RESCHED | _TIF_SYSCALL_AUDIT | \ | |
56bfc42f PM |
152 | _TIF_SINGLESTEP | _TIF_NOTIFY_RESUME | \ |
153 | _TIF_SYSCALL_TRACEPOINT) | |
cec3fd3e PM |
154 | |
155 | /* work to do on interrupt/exception return */ | |
156 | #define _TIF_WORK_MASK (_TIF_ALLWORK_MASK & ~(_TIF_SYSCALL_TRACE | \ | |
157 | _TIF_SYSCALL_AUDIT | _TIF_SINGLESTEP)) | |
1da177e4 | 158 | |
56bfc42f PM |
159 | /* |
160 | * Thread-synchronous status. | |
161 | * | |
162 | * This is different from the flags in that nobody else | |
163 | * ever touches our thread-synchronous status, so we don't | |
164 | * have to worry about atomic accesses. | |
165 | */ | |
166 | #define TS_RESTORE_SIGMASK 0x0001 /* restore signal mask in do_signal() */ | |
d3ea9fa0 | 167 | #define TS_USEDFPU 0x0002 /* FPU used by this task this quantum */ |
56bfc42f PM |
168 | |
169 | #ifndef __ASSEMBLY__ | |
170 | #define HAVE_SET_RESTORE_SIGMASK 1 | |
171 | static inline void set_restore_sigmask(void) | |
172 | { | |
173 | struct thread_info *ti = current_thread_info(); | |
174 | ti->status |= TS_RESTORE_SIGMASK; | |
175 | set_bit(TIF_SIGPENDING, (unsigned long *)&ti->flags); | |
176 | } | |
177 | #endif /* !__ASSEMBLY__ */ | |
178 | ||
1da177e4 LT |
179 | #endif /* __KERNEL__ */ |
180 | ||
181 | #endif /* __ASM_SH_THREAD_INFO_H */ |