Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * include/asm-s390/thread_info.h |
| 3 | * |
| 4 | * S390 version |
Heiko Carstens | 54dfe5d | 2006-02-01 03:06:38 -0800 | [diff] [blame] | 5 | * Copyright (C) IBM Corp. 2002,2006 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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__ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 18 | #define THREAD_ORDER 1 |
| 19 | #define ASYNC_ORDER 1 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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__ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 34 | #include <asm/lowcore.h> |
Christian Ehrhardt | 25097bf | 2009-04-14 15:36:16 +0200 | [diff] [blame] | 35 | #include <asm/page.h> |
| 36 | #include <asm/processor.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 37 | |
| 38 | /* |
| 39 | * low level task data that entry.S needs immediate access to |
| 40 | * - this struct should fit entirely inside of one cache line |
| 41 | * - this struct shares the supervisor stack pages |
| 42 | * - if the contents of this structure are changed, the assembly constants must also be changed |
| 43 | */ |
| 44 | struct thread_info { |
| 45 | struct task_struct *task; /* main task structure */ |
| 46 | struct exec_domain *exec_domain; /* execution domain */ |
| 47 | unsigned long flags; /* low level flags */ |
| 48 | unsigned int cpu; /* current CPU */ |
Jesper Juhl | dcd497f | 2005-06-23 00:09:07 -0700 | [diff] [blame] | 49 | int preempt_count; /* 0 => preemptable, <0 => BUG */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 50 | struct restart_block restart_block; |
Martin Schwidefsky | aa5e97c | 2008-12-31 15:11:39 +0100 | [diff] [blame] | 51 | __u64 user_timer; |
| 52 | __u64 system_timer; |
Martin Schwidefsky | 86f2552 | 2010-05-17 10:00:05 +0200 | [diff] [blame] | 53 | unsigned long last_break; /* last breaking-event-address. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 54 | }; |
| 55 | |
| 56 | /* |
| 57 | * macros/functions for gaining access to the thread information structure |
| 58 | */ |
| 59 | #define INIT_THREAD_INFO(tsk) \ |
| 60 | { \ |
| 61 | .task = &tsk, \ |
| 62 | .exec_domain = &default_exec_domain, \ |
| 63 | .flags = 0, \ |
| 64 | .cpu = 0, \ |
Peter Zijlstra | c99e6ef | 2009-07-10 14:57:56 +0200 | [diff] [blame] | 65 | .preempt_count = INIT_PREEMPT_COUNT, \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 66 | .restart_block = { \ |
| 67 | .fn = do_no_restart_syscall, \ |
| 68 | }, \ |
| 69 | } |
| 70 | |
| 71 | #define init_thread_info (init_thread_union.thread_info) |
| 72 | #define init_stack (init_thread_union.stack) |
| 73 | |
| 74 | /* how to get the thread information struct from C */ |
| 75 | static inline struct thread_info *current_thread_info(void) |
| 76 | { |
Martin Schwidefsky | 6432c01 | 2011-01-05 12:47:42 +0100 | [diff] [blame^] | 77 | return (struct thread_info *) S390_lowcore.thread_info; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 78 | } |
| 79 | |
FUJITA Tomonori | b69c49b | 2008-07-25 01:45:40 -0700 | [diff] [blame] | 80 | #define THREAD_SIZE_ORDER THREAD_ORDER |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 81 | |
| 82 | #endif |
| 83 | |
| 84 | /* |
| 85 | * thread information flags bit numbers |
| 86 | */ |
Martin Schwidefsky | 753c4dd | 2008-10-10 21:33:20 +0200 | [diff] [blame] | 87 | #define TIF_NOTIFY_RESUME 1 /* callback before returning to user */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 88 | #define TIF_SIGPENDING 2 /* signal pending */ |
| 89 | #define TIF_NEED_RESCHED 3 /* rescheduling necessary */ |
| 90 | #define TIF_RESTART_SVC 4 /* restart svc with new svc number */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 91 | #define TIF_SINGLE_STEP 6 /* deliver sigtrap on return to user */ |
Heiko Carstens | 77fa224 | 2005-06-25 14:55:30 -0700 | [diff] [blame] | 92 | #define TIF_MCCK_PENDING 7 /* machine check handling is pending */ |
Heiko Carstens | bcf5cef | 2009-06-12 10:26:26 +0200 | [diff] [blame] | 93 | #define TIF_SYSCALL_TRACE 8 /* syscall trace active */ |
| 94 | #define TIF_SYSCALL_AUDIT 9 /* syscall auditing active */ |
| 95 | #define TIF_SECCOMP 10 /* secure computing */ |
Josh Stone | 6670000 | 2009-08-24 14:43:11 -0700 | [diff] [blame] | 96 | #define TIF_SYSCALL_TRACEPOINT 11 /* syscall tracepoint instrumentation */ |
Martin Schwidefsky | bebf023 | 2010-01-13 20:44:28 +0100 | [diff] [blame] | 97 | #define TIF_POLLING_NRFLAG 16 /* true if poll_idle() is polling |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 98 | TIF_NEED_RESCHED */ |
Martin Schwidefsky | bebf023 | 2010-01-13 20:44:28 +0100 | [diff] [blame] | 99 | #define TIF_31BIT 17 /* 32bit process */ |
Andreas Dilger | 0ddc932 | 2010-05-14 11:13:27 +0200 | [diff] [blame] | 100 | #define TIF_MEMDIE 18 /* is terminating due to OOM killer */ |
Martin Schwidefsky | bebf023 | 2010-01-13 20:44:28 +0100 | [diff] [blame] | 101 | #define TIF_RESTORE_SIGMASK 19 /* restore signal mask in do_signal() */ |
| 102 | #define TIF_FREEZE 20 /* thread is freezing for suspend */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 103 | |
Martin Schwidefsky | 753c4dd | 2008-10-10 21:33:20 +0200 | [diff] [blame] | 104 | #define _TIF_NOTIFY_RESUME (1<<TIF_NOTIFY_RESUME) |
Heiko Carstens | 54dfe5d | 2006-02-01 03:06:38 -0800 | [diff] [blame] | 105 | #define _TIF_RESTORE_SIGMASK (1<<TIF_RESTORE_SIGMASK) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 106 | #define _TIF_SIGPENDING (1<<TIF_SIGPENDING) |
| 107 | #define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED) |
| 108 | #define _TIF_RESTART_SVC (1<<TIF_RESTART_SVC) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 109 | #define _TIF_SINGLE_STEP (1<<TIF_SINGLE_STEP) |
Heiko Carstens | 77fa224 | 2005-06-25 14:55:30 -0700 | [diff] [blame] | 110 | #define _TIF_MCCK_PENDING (1<<TIF_MCCK_PENDING) |
Heiko Carstens | bcf5cef | 2009-06-12 10:26:26 +0200 | [diff] [blame] | 111 | #define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE) |
| 112 | #define _TIF_SYSCALL_AUDIT (1<<TIF_SYSCALL_AUDIT) |
| 113 | #define _TIF_SECCOMP (1<<TIF_SECCOMP) |
Josh Stone | 6670000 | 2009-08-24 14:43:11 -0700 | [diff] [blame] | 114 | #define _TIF_SYSCALL_TRACEPOINT (1<<TIF_SYSCALL_TRACEPOINT) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 115 | #define _TIF_POLLING_NRFLAG (1<<TIF_POLLING_NRFLAG) |
| 116 | #define _TIF_31BIT (1<<TIF_31BIT) |
Matt Helsley | 83224b0 | 2008-10-18 20:27:18 -0700 | [diff] [blame] | 117 | #define _TIF_FREEZE (1<<TIF_FREEZE) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 118 | |
| 119 | #endif /* __KERNEL__ */ |
| 120 | |
| 121 | #define PREEMPT_ACTIVE 0x4000000 |
| 122 | |
| 123 | #endif /* _ASM_THREAD_INFO_H */ |