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1da177e4 LT |
1 | /* |
2 | * include/asm-s390/thread_info.h | |
3 | * | |
4 | * S390 version | |
54dfe5dd | 5 | * Copyright (C) IBM Corp. 2002,2006 |
1da177e4 LT |
6 | * Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com) |
7 | */ | |
8 | ||
9 | #ifndef _ASM_THREAD_INFO_H | |
10 | #define _ASM_THREAD_INFO_H | |
11 | ||
12 | #ifdef __KERNEL__ | |
13 | ||
14 | /* | |
15 | * Size of kernel stack for each process | |
16 | */ | |
17 | #ifndef __s390x__ | |
1da177e4 LT |
18 | #define THREAD_ORDER 1 |
19 | #define ASYNC_ORDER 1 | |
1da177e4 LT |
20 | #else /* __s390x__ */ |
21 | #ifndef __SMALL_STACK | |
22 | #define THREAD_ORDER 2 | |
23 | #define ASYNC_ORDER 2 | |
24 | #else | |
25 | #define THREAD_ORDER 1 | |
26 | #define ASYNC_ORDER 1 | |
27 | #endif | |
28 | #endif /* __s390x__ */ | |
29 | ||
30 | #define THREAD_SIZE (PAGE_SIZE << THREAD_ORDER) | |
31 | #define ASYNC_SIZE (PAGE_SIZE << ASYNC_ORDER) | |
32 | ||
33 | #ifndef __ASSEMBLY__ | |
34 | #include <asm/processor.h> | |
35 | #include <asm/lowcore.h> | |
36 | ||
37 | /* | |
38 | * low level task data that entry.S needs immediate access to | |
39 | * - this struct should fit entirely inside of one cache line | |
40 | * - this struct shares the supervisor stack pages | |
41 | * - if the contents of this structure are changed, the assembly constants must also be changed | |
42 | */ | |
43 | struct thread_info { | |
44 | struct task_struct *task; /* main task structure */ | |
45 | struct exec_domain *exec_domain; /* execution domain */ | |
46 | unsigned long flags; /* low level flags */ | |
47 | unsigned int cpu; /* current CPU */ | |
dcd497f9 | 48 | int preempt_count; /* 0 => preemptable, <0 => BUG */ |
1da177e4 | 49 | struct restart_block restart_block; |
aa5e97ce MS |
50 | __u64 user_timer; |
51 | __u64 system_timer; | |
1da177e4 LT |
52 | }; |
53 | ||
54 | /* | |
55 | * macros/functions for gaining access to the thread information structure | |
56 | */ | |
57 | #define INIT_THREAD_INFO(tsk) \ | |
58 | { \ | |
59 | .task = &tsk, \ | |
60 | .exec_domain = &default_exec_domain, \ | |
61 | .flags = 0, \ | |
62 | .cpu = 0, \ | |
cc43ec1a | 63 | .preempt_count = 1, \ |
1da177e4 LT |
64 | .restart_block = { \ |
65 | .fn = do_no_restart_syscall, \ | |
66 | }, \ | |
67 | } | |
68 | ||
69 | #define init_thread_info (init_thread_union.thread_info) | |
70 | #define init_stack (init_thread_union.stack) | |
71 | ||
72 | /* how to get the thread information struct from C */ | |
73 | static inline struct thread_info *current_thread_info(void) | |
74 | { | |
75 | return (struct thread_info *)((*(unsigned long *) __LC_KERNEL_STACK)-THREAD_SIZE); | |
76 | } | |
77 | ||
b69c49b7 | 78 | #define THREAD_SIZE_ORDER THREAD_ORDER |
1da177e4 LT |
79 | |
80 | #endif | |
81 | ||
82 | /* | |
83 | * thread information flags bit numbers | |
84 | */ | |
85 | #define TIF_SYSCALL_TRACE 0 /* syscall trace active */ | |
753c4dd6 | 86 | #define TIF_NOTIFY_RESUME 1 /* callback before returning to user */ |
1da177e4 LT |
87 | #define TIF_SIGPENDING 2 /* signal pending */ |
88 | #define TIF_NEED_RESCHED 3 /* rescheduling necessary */ | |
89 | #define TIF_RESTART_SVC 4 /* restart svc with new svc number */ | |
90 | #define TIF_SYSCALL_AUDIT 5 /* syscall auditing active */ | |
91 | #define TIF_SINGLE_STEP 6 /* deliver sigtrap on return to user */ | |
77fa2245 | 92 | #define TIF_MCCK_PENDING 7 /* machine check handling is pending */ |
1da177e4 LT |
93 | #define TIF_USEDFPU 16 /* FPU was used by this task this quantum (SMP) */ |
94 | #define TIF_POLLING_NRFLAG 17 /* true if poll_idle() is polling | |
95 | TIF_NEED_RESCHED */ | |
96 | #define TIF_31BIT 18 /* 32bit process */ | |
97 | #define TIF_MEMDIE 19 | |
02a029b3 | 98 | #define TIF_RESTORE_SIGMASK 20 /* restore signal mask in do_signal() */ |
83224b08 | 99 | #define TIF_FREEZE 21 /* thread is freezing for suspend */ |
1da177e4 LT |
100 | |
101 | #define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE) | |
753c4dd6 | 102 | #define _TIF_NOTIFY_RESUME (1<<TIF_NOTIFY_RESUME) |
54dfe5dd | 103 | #define _TIF_RESTORE_SIGMASK (1<<TIF_RESTORE_SIGMASK) |
1da177e4 LT |
104 | #define _TIF_SIGPENDING (1<<TIF_SIGPENDING) |
105 | #define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED) | |
106 | #define _TIF_RESTART_SVC (1<<TIF_RESTART_SVC) | |
107 | #define _TIF_SYSCALL_AUDIT (1<<TIF_SYSCALL_AUDIT) | |
108 | #define _TIF_SINGLE_STEP (1<<TIF_SINGLE_STEP) | |
77fa2245 | 109 | #define _TIF_MCCK_PENDING (1<<TIF_MCCK_PENDING) |
1da177e4 LT |
110 | #define _TIF_USEDFPU (1<<TIF_USEDFPU) |
111 | #define _TIF_POLLING_NRFLAG (1<<TIF_POLLING_NRFLAG) | |
112 | #define _TIF_31BIT (1<<TIF_31BIT) | |
83224b08 | 113 | #define _TIF_FREEZE (1<<TIF_FREEZE) |
1da177e4 LT |
114 | |
115 | #endif /* __KERNEL__ */ | |
116 | ||
117 | #define PREEMPT_ACTIVE 0x4000000 | |
118 | ||
119 | #endif /* _ASM_THREAD_INFO_H */ |