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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 | ||
14 | #define PREEMPT_ACTIVE_BIT 30 | |
15 | #define PREEMPT_ACTIVE (1 << PREEMPT_ACTIVE_BIT) | |
16 | ||
17 | #ifndef __ASSEMBLY__ | |
18 | ||
19 | /* | |
20 | * On IA-64, we want to keep the task structure and kernel stack together, so they can be | |
21 | * mapped by a single TLB entry and so they can be addressed by the "current" pointer | |
22 | * without having to do pointer masking. | |
23 | */ | |
24 | struct thread_info { | |
25 | struct task_struct *task; /* XXX not really needed, except for dup_task_struct() */ | |
26 | struct exec_domain *exec_domain;/* execution domain */ | |
27 | __u32 flags; /* thread_info flags (see TIF_*) */ | |
28 | __u32 cpu; /* current CPU */ | |
e08e6c52 | 29 | __u32 last_cpu; /* Last CPU thread ran on */ |
495ab9c0 | 30 | __u32 status; /* Thread synchronous flags */ |
1da177e4 | 31 | mm_segment_t addr_limit; /* user-level address space limit */ |
dcd497f9 | 32 | int preempt_count; /* 0=premptable, <0=BUG; will also serve as bh-counter */ |
1da177e4 | 33 | struct restart_block restart_block; |
b64f34cd HS |
34 | #ifdef CONFIG_VIRT_CPU_ACCOUNTING |
35 | __u64 ac_stamp; | |
36 | __u64 ac_leave; | |
37 | __u64 ac_stime; | |
38 | __u64 ac_utime; | |
39 | #endif | |
1da177e4 LT |
40 | }; |
41 | ||
42 | #define THREAD_SIZE KERNEL_STACK_SIZE | |
43 | ||
44 | #define INIT_THREAD_INFO(tsk) \ | |
45 | { \ | |
46 | .task = &tsk, \ | |
47 | .exec_domain = &default_exec_domain, \ | |
48 | .flags = 0, \ | |
49 | .cpu = 0, \ | |
50 | .addr_limit = KERNEL_DS, \ | |
51 | .preempt_count = 0, \ | |
52 | .restart_block = { \ | |
53 | .fn = do_no_restart_syscall, \ | |
54 | }, \ | |
55 | } | |
56 | ||
82f1b07b | 57 | #ifndef ASM_OFFSETS_C |
1da177e4 LT |
58 | /* how to get the thread information struct from C */ |
59 | #define current_thread_info() ((struct thread_info *) ((char *) current + IA64_TASK_SIZE)) | |
60 | #define alloc_thread_info(tsk) ((struct thread_info *) ((char *) (tsk) + IA64_TASK_SIZE)) | |
ab03591d | 61 | #define task_thread_info(tsk) ((struct thread_info *) ((char *) (tsk) + IA64_TASK_SIZE)) |
82f1b07b TL |
62 | #else |
63 | #define current_thread_info() ((struct thread_info *) 0) | |
64 | #define alloc_thread_info(tsk) ((struct thread_info *) 0) | |
ab03591d | 65 | #define task_thread_info(tsk) ((struct thread_info *) 0) |
82f1b07b | 66 | #endif |
1da177e4 | 67 | #define free_thread_info(ti) /* nothing */ |
ab03591d AV |
68 | #define task_stack_page(tsk) ((void *)(tsk)) |
69 | ||
70 | #define __HAVE_THREAD_FUNCTIONS | |
b64f34cd HS |
71 | #ifdef CONFIG_VIRT_CPU_ACCOUNTING |
72 | #define setup_thread_stack(p, org) \ | |
73 | *task_thread_info(p) = *task_thread_info(org); \ | |
74 | task_thread_info(p)->ac_stime = 0; \ | |
75 | task_thread_info(p)->ac_utime = 0; \ | |
76 | task_thread_info(p)->task = (p); | |
77 | #else | |
ab03591d AV |
78 | #define setup_thread_stack(p, org) \ |
79 | *task_thread_info(p) = *task_thread_info(org); \ | |
80 | task_thread_info(p)->task = (p); | |
b64f34cd | 81 | #endif |
ab03591d | 82 | #define end_of_stack(p) (unsigned long *)((void *)(p) + IA64_RBS_OFFSET) |
1da177e4 LT |
83 | |
84 | #define __HAVE_ARCH_TASK_STRUCT_ALLOCATOR | |
36c8b586 | 85 | #define alloc_task_struct() ((struct task_struct *)__get_free_pages(GFP_KERNEL | __GFP_COMP, KERNEL_STACK_SIZE_ORDER)) |
1da177e4 LT |
86 | #define free_task_struct(tsk) free_pages((unsigned long) (tsk), KERNEL_STACK_SIZE_ORDER) |
87 | ||
5aa92ffd PT |
88 | #define tsk_set_notify_resume(tsk) \ |
89 | set_ti_thread_flag(task_thread_info(tsk), TIF_NOTIFY_RESUME) | |
90 | extern void tsk_clear_notify_resume(struct task_struct *tsk); | |
1da177e4 LT |
91 | #endif /* !__ASSEMBLY */ |
92 | ||
93 | /* | |
94 | * thread information flags | |
95 | * - these are process state flags that various assembly files may need to access | |
96 | * - pending work-to-be-done flags are in least-significant 16 bits, other flags | |
97 | * in top 16 bits | |
98 | */ | |
a583f1b5 SE |
99 | #define TIF_SIGPENDING 0 /* signal pending */ |
100 | #define TIF_NEED_RESCHED 1 /* rescheduling necessary */ | |
101 | #define TIF_SYSCALL_TRACE 2 /* syscall trace active */ | |
102 | #define TIF_SYSCALL_AUDIT 3 /* syscall auditing active */ | |
103 | #define TIF_SINGLESTEP 4 /* restore singlestep on return to user mode */ | |
104 | #define TIF_RESTORE_SIGMASK 5 /* restore signal mask in do_signal() */ | |
5aa92ffd | 105 | #define TIF_NOTIFY_RESUME 6 /* resumption notification requested */ |
1da177e4 LT |
106 | #define TIF_POLLING_NRFLAG 16 /* true if poll_idle() is polling TIF_NEED_RESCHED */ |
107 | #define TIF_MEMDIE 17 | |
e619ae0b | 108 | #define TIF_MCA_INIT 18 /* this task is processing MCA or INIT */ |
15029285 | 109 | #define TIF_DB_DISABLED 19 /* debug trap disabled for fsyscall */ |
8a102eed | 110 | #define TIF_FREEZE 20 /* is freezing for suspend */ |
3b2ce0b1 | 111 | #define TIF_RESTORE_RSE 21 /* user RBS is newer than kernel RBS */ |
1da177e4 LT |
112 | |
113 | #define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE) | |
114 | #define _TIF_SYSCALL_AUDIT (1 << TIF_SYSCALL_AUDIT) | |
90f9d70a | 115 | #define _TIF_SINGLESTEP (1 << TIF_SINGLESTEP) |
116 | #define _TIF_SYSCALL_TRACEAUDIT (_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT|_TIF_SINGLESTEP) | |
4a177cbf | 117 | #define _TIF_RESTORE_SIGMASK (1 << TIF_RESTORE_SIGMASK) |
5aa92ffd | 118 | #define _TIF_NOTIFY_RESUME (1 << TIF_NOTIFY_RESUME) |
1da177e4 LT |
119 | #define _TIF_SIGPENDING (1 << TIF_SIGPENDING) |
120 | #define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED) | |
1da177e4 | 121 | #define _TIF_POLLING_NRFLAG (1 << TIF_POLLING_NRFLAG) |
e619ae0b | 122 | #define _TIF_MCA_INIT (1 << TIF_MCA_INIT) |
15029285 | 123 | #define _TIF_DB_DISABLED (1 << TIF_DB_DISABLED) |
8a102eed | 124 | #define _TIF_FREEZE (1 << TIF_FREEZE) |
3b2ce0b1 | 125 | #define _TIF_RESTORE_RSE (1 << TIF_RESTORE_RSE) |
1da177e4 LT |
126 | |
127 | /* "work to do on user-return" bits */ | |
5aa92ffd | 128 | #define TIF_ALLWORK_MASK (_TIF_SIGPENDING|_TIF_NOTIFY_RESUME|_TIF_SYSCALL_AUDIT|\ |
a583f1b5 SE |
129 | _TIF_NEED_RESCHED| _TIF_SYSCALL_TRACE|\ |
130 | _TIF_RESTORE_SIGMASK) | |
1da177e4 LT |
131 | /* like TIF_ALLWORK_BITS but sans TIF_SYSCALL_TRACE or TIF_SYSCALL_AUDIT */ |
132 | #define TIF_WORK_MASK (TIF_ALLWORK_MASK&~(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT)) | |
133 | ||
495ab9c0 AK |
134 | #define TS_POLLING 1 /* true if in idle loop and not sleeping */ |
135 | ||
c9f4f06d | 136 | #define tsk_is_polling(t) (task_thread_info(t)->status & TS_POLLING) |
495ab9c0 | 137 | |
1da177e4 | 138 | #endif /* _ASM_IA64_THREAD_INFO_H */ |