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1da177e4 LT |
1 | /* |
2 | * Copyright (C) 2002-2003 Hewlett-Packard Co | |
3 | * David Mosberger-Tang <davidm@hpl.hp.com> | |
4 | */ | |
5 | #ifndef _ASM_IA64_THREAD_INFO_H | |
6 | #define _ASM_IA64_THREAD_INFO_H | |
7 | ||
82f1b07b | 8 | #ifndef ASM_OFFSETS_C |
0013a854 | 9 | #include <asm/asm-offsets.h> |
82f1b07b | 10 | #endif |
1da177e4 LT |
11 | #include <asm/processor.h> |
12 | #include <asm/ptrace.h> | |
13 | ||
1da177e4 LT |
14 | #ifndef __ASSEMBLY__ |
15 | ||
16 | /* | |
17 | * On IA-64, we want to keep the task structure and kernel stack together, so they can be | |
18 | * mapped by a single TLB entry and so they can be addressed by the "current" pointer | |
19 | * without having to do pointer masking. | |
20 | */ | |
21 | struct thread_info { | |
22 | struct task_struct *task; /* XXX not really needed, except for dup_task_struct() */ | |
1da177e4 LT |
23 | __u32 flags; /* thread_info flags (see TIF_*) */ |
24 | __u32 cpu; /* current CPU */ | |
e08e6c52 | 25 | __u32 last_cpu; /* Last CPU thread ran on */ |
495ab9c0 | 26 | __u32 status; /* Thread synchronous flags */ |
1da177e4 | 27 | mm_segment_t addr_limit; /* user-level address space limit */ |
dcd497f9 | 28 | int preempt_count; /* 0=premptable, <0=BUG; will also serve as bh-counter */ |
abf917cd | 29 | #ifdef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE |
b64f34cd HS |
30 | __u64 ac_stamp; |
31 | __u64 ac_leave; | |
32 | __u64 ac_stime; | |
33 | __u64 ac_utime; | |
34 | #endif | |
1da177e4 LT |
35 | }; |
36 | ||
37 | #define THREAD_SIZE KERNEL_STACK_SIZE | |
38 | ||
39 | #define INIT_THREAD_INFO(tsk) \ | |
40 | { \ | |
41 | .task = &tsk, \ | |
1da177e4 LT |
42 | .flags = 0, \ |
43 | .cpu = 0, \ | |
44 | .addr_limit = KERNEL_DS, \ | |
c99e6efe | 45 | .preempt_count = INIT_PREEMPT_COUNT, \ |
1da177e4 LT |
46 | } |
47 | ||
82f1b07b | 48 | #ifndef ASM_OFFSETS_C |
1da177e4 LT |
49 | /* how to get the thread information struct from C */ |
50 | #define current_thread_info() ((struct thread_info *) ((char *) current + IA64_TASK_SIZE)) | |
b235beea LT |
51 | #define alloc_thread_stack_node(tsk, node) \ |
52 | ((unsigned long *) ((char *) (tsk) + IA64_TASK_SIZE)) | |
ab03591d | 53 | #define task_thread_info(tsk) ((struct thread_info *) ((char *) (tsk) + IA64_TASK_SIZE)) |
82f1b07b TL |
54 | #else |
55 | #define current_thread_info() ((struct thread_info *) 0) | |
b235beea | 56 | #define alloc_thread_stack_node(tsk, node) ((unsigned long *) 0) |
ab03591d | 57 | #define task_thread_info(tsk) ((struct thread_info *) 0) |
82f1b07b | 58 | #endif |
b235beea | 59 | #define free_thread_stack(ti) /* nothing */ |
ab03591d AV |
60 | #define task_stack_page(tsk) ((void *)(tsk)) |
61 | ||
62 | #define __HAVE_THREAD_FUNCTIONS | |
abf917cd | 63 | #ifdef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE |
b64f34cd HS |
64 | #define setup_thread_stack(p, org) \ |
65 | *task_thread_info(p) = *task_thread_info(org); \ | |
66 | task_thread_info(p)->ac_stime = 0; \ | |
67 | task_thread_info(p)->ac_utime = 0; \ | |
68 | task_thread_info(p)->task = (p); | |
69 | #else | |
ab03591d AV |
70 | #define setup_thread_stack(p, org) \ |
71 | *task_thread_info(p) = *task_thread_info(org); \ | |
72 | task_thread_info(p)->task = (p); | |
b64f34cd | 73 | #endif |
ab03591d | 74 | #define end_of_stack(p) (unsigned long *)((void *)(p) + IA64_RBS_OFFSET) |
1da177e4 | 75 | |
504f52b5 ED |
76 | #define alloc_task_struct_node(node) \ |
77 | ({ \ | |
78 | struct page *page = alloc_pages_node(node, GFP_KERNEL | __GFP_COMP, \ | |
79 | KERNEL_STACK_SIZE_ORDER); \ | |
80 | struct task_struct *ret = page ? page_address(page) : NULL; \ | |
81 | \ | |
f48fea03 | 82 | ret; \ |
504f52b5 | 83 | }) |
1da177e4 LT |
84 | #define free_task_struct(tsk) free_pages((unsigned long) (tsk), KERNEL_STACK_SIZE_ORDER) |
85 | ||
86 | #endif /* !__ASSEMBLY */ | |
87 | ||
88 | /* | |
89 | * thread information flags | |
90 | * - these are process state flags that various assembly files may need to access | |
91 | * - pending work-to-be-done flags are in least-significant 16 bits, other flags | |
92 | * in top 16 bits | |
93 | */ | |
a583f1b5 SE |
94 | #define TIF_SIGPENDING 0 /* signal pending */ |
95 | #define TIF_NEED_RESCHED 1 /* rescheduling necessary */ | |
96 | #define TIF_SYSCALL_TRACE 2 /* syscall trace active */ | |
97 | #define TIF_SYSCALL_AUDIT 3 /* syscall auditing active */ | |
98 | #define TIF_SINGLESTEP 4 /* restore singlestep on return to user mode */ | |
5aa92ffd | 99 | #define TIF_NOTIFY_RESUME 6 /* resumption notification requested */ |
0ddc9324 | 100 | #define TIF_MEMDIE 17 /* is terminating due to OOM killer */ |
e619ae0b | 101 | #define TIF_MCA_INIT 18 /* this task is processing MCA or INIT */ |
15029285 | 102 | #define TIF_DB_DISABLED 19 /* debug trap disabled for fsyscall */ |
3b2ce0b1 | 103 | #define TIF_RESTORE_RSE 21 /* user RBS is newer than kernel RBS */ |
04075425 | 104 | #define TIF_POLLING_NRFLAG 22 /* idle is polling for TIF_NEED_RESCHED */ |
1da177e4 LT |
105 | |
106 | #define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE) | |
107 | #define _TIF_SYSCALL_AUDIT (1 << TIF_SYSCALL_AUDIT) | |
90f9d70a | 108 | #define _TIF_SINGLESTEP (1 << TIF_SINGLESTEP) |
109 | #define _TIF_SYSCALL_TRACEAUDIT (_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT|_TIF_SINGLESTEP) | |
5aa92ffd | 110 | #define _TIF_NOTIFY_RESUME (1 << TIF_NOTIFY_RESUME) |
1da177e4 LT |
111 | #define _TIF_SIGPENDING (1 << TIF_SIGPENDING) |
112 | #define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED) | |
e619ae0b | 113 | #define _TIF_MCA_INIT (1 << TIF_MCA_INIT) |
15029285 | 114 | #define _TIF_DB_DISABLED (1 << TIF_DB_DISABLED) |
3b2ce0b1 | 115 | #define _TIF_RESTORE_RSE (1 << TIF_RESTORE_RSE) |
04075425 | 116 | #define _TIF_POLLING_NRFLAG (1 << TIF_POLLING_NRFLAG) |
1da177e4 LT |
117 | |
118 | /* "work to do on user-return" bits */ | |
5aa92ffd | 119 | #define TIF_ALLWORK_MASK (_TIF_SIGPENDING|_TIF_NOTIFY_RESUME|_TIF_SYSCALL_AUDIT|\ |
49eaeb4b | 120 | _TIF_NEED_RESCHED|_TIF_SYSCALL_TRACE) |
1da177e4 LT |
121 | /* like TIF_ALLWORK_BITS but sans TIF_SYSCALL_TRACE or TIF_SYSCALL_AUDIT */ |
122 | #define TIF_WORK_MASK (TIF_ALLWORK_MASK&~(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT)) | |
123 | ||
848376c7 | 124 | #define TS_RESTORE_SIGMASK 2 /* restore signal mask in do_signal() */ |
495ab9c0 | 125 | |
848376c7 RM |
126 | #ifndef __ASSEMBLY__ |
127 | #define HAVE_SET_RESTORE_SIGMASK 1 | |
128 | static inline void set_restore_sigmask(void) | |
129 | { | |
130 | struct thread_info *ti = current_thread_info(); | |
131 | ti->status |= TS_RESTORE_SIGMASK; | |
edd63a27 | 132 | WARN_ON(!test_bit(TIF_SIGPENDING, &ti->flags)); |
848376c7 | 133 | } |
4ebefe3e AV |
134 | static inline void clear_restore_sigmask(void) |
135 | { | |
136 | current_thread_info()->status &= ~TS_RESTORE_SIGMASK; | |
137 | } | |
138 | static inline bool test_restore_sigmask(void) | |
139 | { | |
140 | return current_thread_info()->status & TS_RESTORE_SIGMASK; | |
141 | } | |
142 | static inline bool test_and_clear_restore_sigmask(void) | |
143 | { | |
144 | struct thread_info *ti = current_thread_info(); | |
145 | if (!(ti->status & TS_RESTORE_SIGMASK)) | |
146 | return false; | |
147 | ti->status &= ~TS_RESTORE_SIGMASK; | |
148 | return true; | |
149 | } | |
848376c7 RM |
150 | #endif /* !__ASSEMBLY__ */ |
151 | ||
1da177e4 | 152 | #endif /* _ASM_IA64_THREAD_INFO_H */ |