Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
Russell King | 4baa992 | 2008-08-02 10:55:55 +0100 | [diff] [blame] | 2 | * arch/arm/include/asm/thread_info.h |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3 | * |
| 4 | * Copyright (C) 2002 Russell King. |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License version 2 as |
| 8 | * published by the Free Software Foundation. |
| 9 | */ |
| 10 | #ifndef __ASM_ARM_THREAD_INFO_H |
| 11 | #define __ASM_ARM_THREAD_INFO_H |
| 12 | |
| 13 | #ifdef __KERNEL__ |
| 14 | |
Russell King | 8dc39b8 | 2005-11-16 17:23:57 +0000 | [diff] [blame] | 15 | #include <linux/compiler.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 16 | #include <asm/fpstate.h> |
| 17 | |
Russell King | 4f7a181 | 2005-05-05 13:11:00 +0100 | [diff] [blame] | 18 | #define THREAD_SIZE_ORDER 1 |
| 19 | #define THREAD_SIZE 8192 |
| 20 | #define THREAD_START_SP (THREAD_SIZE - 8) |
| 21 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 22 | #ifndef __ASSEMBLY__ |
| 23 | |
| 24 | struct task_struct; |
| 25 | struct exec_domain; |
| 26 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 27 | #include <asm/types.h> |
| 28 | #include <asm/domain.h> |
| 29 | |
| 30 | typedef unsigned long mm_segment_t; |
| 31 | |
| 32 | struct cpu_context_save { |
| 33 | __u32 r4; |
| 34 | __u32 r5; |
| 35 | __u32 r6; |
| 36 | __u32 r7; |
| 37 | __u32 r8; |
| 38 | __u32 r9; |
| 39 | __u32 sl; |
| 40 | __u32 fp; |
| 41 | __u32 sp; |
| 42 | __u32 pc; |
| 43 | __u32 extra[2]; /* Xscale 'acc' register, etc */ |
| 44 | }; |
| 45 | |
| 46 | /* |
| 47 | * low level task data that entry.S needs immediate access to. |
| 48 | * __switch_to() assumes cpu_context follows immediately after cpu_domain. |
| 49 | */ |
| 50 | struct thread_info { |
| 51 | unsigned long flags; /* low level flags */ |
Jesper Juhl | dcd497f | 2005-06-23 00:09:07 -0700 | [diff] [blame] | 52 | int preempt_count; /* 0 => preemptable, <0 => bug */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 53 | mm_segment_t addr_limit; /* address limit */ |
| 54 | struct task_struct *task; /* main task structure */ |
| 55 | struct exec_domain *exec_domain; /* execution domain */ |
| 56 | __u32 cpu; /* cpu */ |
| 57 | __u32 cpu_domain; /* cpu domain */ |
| 58 | struct cpu_context_save cpu_context; /* cpu context */ |
Russell King | 5ba6d3f | 2007-05-06 13:56:26 +0100 | [diff] [blame] | 59 | __u32 syscall; /* syscall number */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 60 | __u8 used_cp[16]; /* thread used copro */ |
| 61 | unsigned long tp_value; |
Lennert Buytenhek | c17fad1 | 2006-06-27 23:03:03 +0100 | [diff] [blame] | 62 | struct crunch_state crunchstate; |
Russell King | cdaabbd | 2006-03-12 22:36:06 +0000 | [diff] [blame] | 63 | union fp_state fpstate __attribute__((aligned(8))); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 64 | union vfp_state vfpstate; |
Catalin Marinas | d7f864b | 2008-04-18 22:43:06 +0100 | [diff] [blame] | 65 | #ifdef CONFIG_ARM_THUMBEE |
| 66 | unsigned long thumbee_state; /* ThumbEE Handler Base register */ |
| 67 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 68 | struct restart_block restart_block; |
| 69 | }; |
| 70 | |
| 71 | #define INIT_THREAD_INFO(tsk) \ |
| 72 | { \ |
| 73 | .task = &tsk, \ |
| 74 | .exec_domain = &default_exec_domain, \ |
| 75 | .flags = 0, \ |
Peter Zijlstra | c99e6ef | 2009-07-10 14:57:56 +0200 | [diff] [blame] | 76 | .preempt_count = INIT_PREEMPT_COUNT, \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 77 | .addr_limit = KERNEL_DS, \ |
| 78 | .cpu_domain = domain_val(DOMAIN_USER, DOMAIN_MANAGER) | \ |
| 79 | domain_val(DOMAIN_KERNEL, DOMAIN_MANAGER) | \ |
| 80 | domain_val(DOMAIN_IO, DOMAIN_CLIENT), \ |
| 81 | .restart_block = { \ |
| 82 | .fn = do_no_restart_syscall, \ |
| 83 | }, \ |
| 84 | } |
| 85 | |
| 86 | #define init_thread_info (init_thread_union.thread_info) |
| 87 | #define init_stack (init_thread_union.stack) |
| 88 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 89 | /* |
| 90 | * how to get the thread information struct from C |
| 91 | */ |
| 92 | static inline struct thread_info *current_thread_info(void) __attribute_const__; |
| 93 | |
| 94 | static inline struct thread_info *current_thread_info(void) |
| 95 | { |
| 96 | register unsigned long sp asm ("sp"); |
| 97 | return (struct thread_info *)(sp & ~(THREAD_SIZE - 1)); |
| 98 | } |
| 99 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 100 | #define thread_saved_pc(tsk) \ |
Russell King | 1de765c | 2008-09-06 10:14:24 +0100 | [diff] [blame] | 101 | ((unsigned long)(task_thread_info(tsk)->cpu_context.pc)) |
Catalin Marinas | 2d7c11b | 2009-02-11 13:07:53 +0100 | [diff] [blame] | 102 | #define thread_saved_sp(tsk) \ |
| 103 | ((unsigned long)(task_thread_info(tsk)->cpu_context.sp)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 104 | #define thread_saved_fp(tsk) \ |
Al Viro | e7c1b32 | 2006-01-12 01:05:56 -0800 | [diff] [blame] | 105 | ((unsigned long)(task_thread_info(tsk)->cpu_context.fp)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 106 | |
Lennert Buytenhek | c17fad1 | 2006-06-27 23:03:03 +0100 | [diff] [blame] | 107 | extern void crunch_task_disable(struct thread_info *); |
| 108 | extern void crunch_task_copy(struct thread_info *, void *); |
| 109 | extern void crunch_task_restore(struct thread_info *, void *); |
| 110 | extern void crunch_task_release(struct thread_info *); |
| 111 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 112 | extern void iwmmxt_task_disable(struct thread_info *); |
| 113 | extern void iwmmxt_task_copy(struct thread_info *, void *); |
| 114 | extern void iwmmxt_task_restore(struct thread_info *, void *); |
| 115 | extern void iwmmxt_task_release(struct thread_info *); |
Lennert Buytenhek | ae95bfb | 2006-07-01 19:56:48 +0100 | [diff] [blame] | 116 | extern void iwmmxt_task_switch(struct thread_info *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 117 | |
Russell King | ad187f9 | 2010-02-06 11:36:23 +0000 | [diff] [blame] | 118 | extern void vfp_sync_hwstate(struct thread_info *); |
| 119 | extern void vfp_flush_hwstate(struct thread_info *); |
Catalin Marinas | 3d1228e | 2009-02-11 13:12:56 +0100 | [diff] [blame] | 120 | |
Will Deacon | 2498814 | 2012-04-23 15:38:28 +0100 | [diff] [blame] | 121 | struct user_vfp; |
| 122 | struct user_vfp_exc; |
| 123 | |
| 124 | extern int vfp_preserve_user_clear_hwstate(struct user_vfp __user *, |
| 125 | struct user_vfp_exc __user *); |
| 126 | extern int vfp_restore_user_hwstate(struct user_vfp __user *, |
| 127 | struct user_vfp_exc __user *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 128 | #endif |
| 129 | |
| 130 | /* |
| 131 | * We use bit 30 of the preempt_count to indicate that kernel |
Russell King | 4baa992 | 2008-08-02 10:55:55 +0100 | [diff] [blame] | 132 | * preemption is occurring. See <asm/hardirq.h>. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 133 | */ |
| 134 | #define PREEMPT_ACTIVE 0x40000000 |
| 135 | |
| 136 | /* |
| 137 | * thread information flags: |
| 138 | * TIF_SYSCALL_TRACE - syscall trace active |
Nathaniel Husted | 29ef73b | 2012-01-03 14:23:09 -0500 | [diff] [blame] | 139 | * TIF_SYSCAL_AUDIT - syscall auditing active |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 140 | * TIF_SIGPENDING - signal pending |
| 141 | * TIF_NEED_RESCHED - rescheduling necessary |
David Howells | d0420c8 | 2009-09-02 09:14:16 +0100 | [diff] [blame] | 142 | * TIF_NOTIFY_RESUME - callback before returning to user |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 143 | * TIF_USEDFPU - FPU was used by this task this quantum (SMP) |
| 144 | * TIF_POLLING_NRFLAG - true if poll_idle() is polling TIF_NEED_RESCHED |
| 145 | */ |
Stephane Eranian | a583f1b | 2007-07-31 00:38:00 -0700 | [diff] [blame] | 146 | #define TIF_SIGPENDING 0 |
| 147 | #define TIF_NEED_RESCHED 1 |
David Howells | d0420c8 | 2009-09-02 09:14:16 +0100 | [diff] [blame] | 148 | #define TIF_NOTIFY_RESUME 2 /* callback before returning to user */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 149 | #define TIF_SYSCALL_TRACE 8 |
Nathaniel Husted | 29ef73b | 2012-01-03 14:23:09 -0500 | [diff] [blame] | 150 | #define TIF_SYSCALL_AUDIT 9 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 151 | #define TIF_POLLING_NRFLAG 16 |
| 152 | #define TIF_USING_IWMMXT 17 |
Andreas Dilger | 0ddc932 | 2010-05-14 11:13:27 +0200 | [diff] [blame] | 153 | #define TIF_MEMDIE 18 /* is terminating due to OOM killer */ |
Mikael Pettersson | 3698426 | 2009-08-15 12:58:11 +0100 | [diff] [blame] | 154 | #define TIF_RESTORE_SIGMASK 20 |
Nicolas Pitre | 70c70d9 | 2010-08-26 15:08:35 -0700 | [diff] [blame] | 155 | #define TIF_SECCOMP 21 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 156 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 157 | #define _TIF_SIGPENDING (1 << TIF_SIGPENDING) |
| 158 | #define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED) |
David Howells | d0420c8 | 2009-09-02 09:14:16 +0100 | [diff] [blame] | 159 | #define _TIF_NOTIFY_RESUME (1 << TIF_NOTIFY_RESUME) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 160 | #define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE) |
Nathaniel Husted | 29ef73b | 2012-01-03 14:23:09 -0500 | [diff] [blame] | 161 | #define _TIF_SYSCALL_AUDIT (1 << TIF_SYSCALL_AUDIT) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 162 | #define _TIF_POLLING_NRFLAG (1 << TIF_POLLING_NRFLAG) |
| 163 | #define _TIF_USING_IWMMXT (1 << TIF_USING_IWMMXT) |
Mikael Pettersson | 3698426 | 2009-08-15 12:58:11 +0100 | [diff] [blame] | 164 | #define _TIF_RESTORE_SIGMASK (1 << TIF_RESTORE_SIGMASK) |
Nicolas Pitre | 70c70d9 | 2010-08-26 15:08:35 -0700 | [diff] [blame] | 165 | #define _TIF_SECCOMP (1 << TIF_SECCOMP) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 166 | |
Nathaniel Husted | 29ef73b | 2012-01-03 14:23:09 -0500 | [diff] [blame] | 167 | /* Checks for any syscall work in entry-common.S */ |
| 168 | #define _TIF_SYSCALL_WORK (_TIF_SYSCALL_TRACE | _TIF_SYSCALL_AUDIT) |
| 169 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 170 | /* |
| 171 | * Change these and you break ASM code in entry-common.S |
| 172 | */ |
| 173 | #define _TIF_WORK_MASK 0x000000ff |
| 174 | |
| 175 | #endif /* __KERNEL__ */ |
| 176 | #endif /* __ASM_ARM_THREAD_INFO_H */ |