Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | #ifndef __ASM_SH_THREAD_INFO_H |
| 2 | #define __ASM_SH_THREAD_INFO_H |
| 3 | |
| 4 | /* SuperH version |
| 5 | * Copyright (C) 2002 Niibe Yutaka |
| 6 | * |
| 7 | * The copyright of original i386 version is: |
| 8 | * |
| 9 | * Copyright (C) 2002 David Howells (dhowells@redhat.com) |
| 10 | * - Incorporating suggestions made by Linus Torvalds and Dave Miller |
| 11 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 12 | #ifdef __KERNEL__ |
Paul Mundt | a6a31139 | 2006-09-27 18:22:14 +0900 | [diff] [blame] | 13 | #include <asm/page.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 14 | |
| 15 | #ifndef __ASSEMBLY__ |
| 16 | #include <asm/processor.h> |
| 17 | |
| 18 | struct thread_info { |
| 19 | struct task_struct *task; /* main task structure */ |
| 20 | struct exec_domain *exec_domain; /* execution domain */ |
Akinobu Mita | 6ecf66a | 2006-03-26 01:39:51 -0800 | [diff] [blame] | 21 | unsigned long flags; /* low level flags */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 22 | __u32 cpu; |
Jesper Juhl | dcd497f | 2005-06-23 00:09:07 -0700 | [diff] [blame] | 23 | int preempt_count; /* 0 => preemptable, <0 => BUG */ |
Paul Mundt | 2991be7 | 2006-09-27 17:07:07 +0900 | [diff] [blame] | 24 | mm_segment_t addr_limit; /* thread address space */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 25 | struct restart_block restart_block; |
Paul Mundt | a6a31139 | 2006-09-27 18:22:14 +0900 | [diff] [blame] | 26 | unsigned long previous_sp; /* sp of previous stack in case |
| 27 | of nested IRQ stacks */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 28 | __u8 supervisor_stack[0]; |
| 29 | }; |
| 30 | |
| 31 | #endif |
| 32 | |
Paul Mundt | 37053cc | 2005-05-28 15:52:01 -0700 | [diff] [blame] | 33 | #define PREEMPT_ACTIVE 0x10000000 |
Paul Mundt | a6a31139 | 2006-09-27 18:22:14 +0900 | [diff] [blame] | 34 | |
Paul Mundt | 7a847f8 | 2006-12-26 15:29:19 +0900 | [diff] [blame] | 35 | #if defined(CONFIG_4KSTACKS) |
| 36 | #define THREAD_SIZE_ORDER (0) |
| 37 | #elif defined(CONFIG_PAGE_SIZE_4KB) |
| 38 | #define THREAD_SIZE_ORDER (1) |
| 39 | #elif defined(CONFIG_PAGE_SIZE_8KB) |
| 40 | #define THREAD_SIZE_ORDER (1) |
Paul Mundt | 66dfe18 | 2008-06-03 18:54:02 +0900 | [diff] [blame] | 41 | #elif defined(CONFIG_PAGE_SIZE_16KB) |
| 42 | #define THREAD_SIZE_ORDER (0) |
Paul Mundt | 7a847f8 | 2006-12-26 15:29:19 +0900 | [diff] [blame] | 43 | #elif defined(CONFIG_PAGE_SIZE_64KB) |
| 44 | #define THREAD_SIZE_ORDER (0) |
Paul Mundt | a6a31139 | 2006-09-27 18:22:14 +0900 | [diff] [blame] | 45 | #else |
Paul Mundt | 7a847f8 | 2006-12-26 15:29:19 +0900 | [diff] [blame] | 46 | #error "Unknown thread size" |
Paul Mundt | a6a31139 | 2006-09-27 18:22:14 +0900 | [diff] [blame] | 47 | #endif |
Paul Mundt | 7a847f8 | 2006-12-26 15:29:19 +0900 | [diff] [blame] | 48 | |
| 49 | #define THREAD_SIZE (PAGE_SIZE << THREAD_SIZE_ORDER) |
| 50 | #define STACK_WARN (THREAD_SIZE >> 3) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 51 | |
| 52 | /* |
| 53 | * macros/functions for gaining access to the thread information structure |
| 54 | */ |
| 55 | #ifndef __ASSEMBLY__ |
| 56 | #define INIT_THREAD_INFO(tsk) \ |
| 57 | { \ |
| 58 | .task = &tsk, \ |
| 59 | .exec_domain = &default_exec_domain, \ |
| 60 | .flags = 0, \ |
| 61 | .cpu = 0, \ |
| 62 | .preempt_count = 1, \ |
Paul Mundt | 2991be7 | 2006-09-27 17:07:07 +0900 | [diff] [blame] | 63 | .addr_limit = KERNEL_DS, \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Paul Mundt | a6a31139 | 2006-09-27 18:22:14 +0900 | [diff] [blame] | 72 | /* how to get the current stack pointer from C */ |
Adrian Bunk | 3ff6eec | 2008-01-24 22:16:20 +0100 | [diff] [blame] | 73 | register unsigned long current_stack_pointer asm("r15") __used; |
Paul Mundt | a6a31139 | 2006-09-27 18:22:14 +0900 | [diff] [blame] | 74 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 75 | /* how to get the thread information struct from C */ |
| 76 | static inline struct thread_info *current_thread_info(void) |
| 77 | { |
| 78 | struct thread_info *ti; |
Paul Mundt | 114f132 | 2007-11-09 13:40:50 +0900 | [diff] [blame] | 79 | #if defined(CONFIG_SUPERH64) |
| 80 | __asm__ __volatile__ ("getcon cr17, %0" : "=r" (ti)); |
| 81 | #elif defined(CONFIG_CPU_HAS_SR_RB) |
| 82 | __asm__ __volatile__ ("stc r7_bank, %0" : "=r" (ti)); |
Paul Mundt | f151749 | 2006-09-27 16:01:12 +0900 | [diff] [blame] | 83 | #else |
| 84 | unsigned long __dummy; |
| 85 | |
| 86 | __asm__ __volatile__ ( |
| 87 | "mov r15, %0\n\t" |
| 88 | "and %1, %0\n\t" |
| 89 | : "=&r" (ti), "=r" (__dummy) |
| 90 | : "1" (~(THREAD_SIZE - 1)) |
| 91 | : "memory"); |
| 92 | #endif |
| 93 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 94 | return ti; |
| 95 | } |
| 96 | |
FUJITA Tomonori | b69c49b | 2008-07-25 01:45:40 -0700 | [diff] [blame] | 97 | #define __HAVE_ARCH_THREAD_INFO_ALLOCATOR |
| 98 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 99 | /* thread information allocation */ |
Paul Mundt | d153ea8 | 2006-09-27 18:20:16 +0900 | [diff] [blame] | 100 | #ifdef CONFIG_DEBUG_STACK_USAGE |
| 101 | #define alloc_thread_info(ti) kzalloc(THREAD_SIZE, GFP_KERNEL) |
| 102 | #else |
| 103 | #define alloc_thread_info(ti) kmalloc(THREAD_SIZE, GFP_KERNEL) |
| 104 | #endif |
| 105 | #define free_thread_info(ti) kfree(ti) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 106 | |
Paul Mundt | 510c72ad | 2006-11-27 12:06:26 +0900 | [diff] [blame] | 107 | #endif /* __ASSEMBLY__ */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 108 | |
| 109 | /* |
| 110 | * thread information flags |
| 111 | * - these are process state flags that various assembly files may need to access |
| 112 | * - pending work-to-be-done flags are in LSW |
| 113 | * - other flags in MSW |
| 114 | */ |
| 115 | #define TIF_SYSCALL_TRACE 0 /* syscall trace active */ |
Stephane Eranian | a583f1b | 2007-07-31 00:38:00 -0700 | [diff] [blame] | 116 | #define TIF_SIGPENDING 1 /* signal pending */ |
| 117 | #define TIF_NEED_RESCHED 2 /* rescheduling necessary */ |
| 118 | #define TIF_RESTORE_SIGMASK 3 /* restore signal mask in do_signal() */ |
| 119 | #define TIF_SINGLESTEP 4 /* singlestepping active */ |
Paul Mundt | c4637d4 | 2008-07-30 15:30:52 +0900 | [diff] [blame] | 120 | #define TIF_SYSCALL_AUDIT 5 /* syscall auditing active */ |
| 121 | #define TIF_SECCOMP 6 /* secure computing */ |
Paul Mundt | ab99c73 | 2008-07-30 19:55:30 +0900 | [diff] [blame^] | 122 | #define TIF_NOTIFY_RESUME 7 /* callback before returning to user */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 123 | #define TIF_USEDFPU 16 /* FPU was used by this task this quantum (SMP) */ |
| 124 | #define TIF_POLLING_NRFLAG 17 /* true if poll_idle() is polling TIF_NEED_RESCHED */ |
| 125 | #define TIF_MEMDIE 18 |
Paul Mundt | ab99c73 | 2008-07-30 19:55:30 +0900 | [diff] [blame^] | 126 | #define TIF_FREEZE 19 /* Freezing for suspend */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 127 | |
Paul Mundt | cec3fd3 | 2008-07-30 13:11:26 +0900 | [diff] [blame] | 128 | #define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE) |
| 129 | #define _TIF_SIGPENDING (1 << TIF_SIGPENDING) |
| 130 | #define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED) |
| 131 | #define _TIF_RESTORE_SIGMASK (1 << TIF_RESTORE_SIGMASK) |
| 132 | #define _TIF_SINGLESTEP (1 << TIF_SINGLESTEP) |
| 133 | #define _TIF_SYSCALL_AUDIT (1 << TIF_SYSCALL_AUDIT) |
Paul Mundt | c4637d4 | 2008-07-30 15:30:52 +0900 | [diff] [blame] | 134 | #define _TIF_SECCOMP (1 << TIF_SECCOMP) |
Paul Mundt | ab99c73 | 2008-07-30 19:55:30 +0900 | [diff] [blame^] | 135 | #define _TIF_NOTIFY_RESUME (1 << TIF_NOTIFY_RESUME) |
Paul Mundt | cec3fd3 | 2008-07-30 13:11:26 +0900 | [diff] [blame] | 136 | #define _TIF_USEDFPU (1 << TIF_USEDFPU) |
| 137 | #define _TIF_POLLING_NRFLAG (1 << TIF_POLLING_NRFLAG) |
| 138 | #define _TIF_FREEZE (1 << TIF_FREEZE) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 139 | |
Paul Mundt | cec3fd3 | 2008-07-30 13:11:26 +0900 | [diff] [blame] | 140 | /* |
| 141 | * _TIF_ALLWORK_MASK and _TIF_WORK_MASK need to fit within a byte, or we |
| 142 | * blow the tst immediate size constraints and need to fix up |
| 143 | * arch/sh/kernel/entry-common.S. |
| 144 | */ |
| 145 | |
| 146 | /* work to do in syscall trace */ |
| 147 | #define _TIF_WORK_SYSCALL_MASK (_TIF_SYSCALL_TRACE | _TIF_SINGLESTEP | \ |
Paul Mundt | c4637d4 | 2008-07-30 15:30:52 +0900 | [diff] [blame] | 148 | _TIF_SYSCALL_AUDIT | _TIF_SECCOMP) |
Paul Mundt | cec3fd3 | 2008-07-30 13:11:26 +0900 | [diff] [blame] | 149 | |
| 150 | /* work to do on any return to u-space */ |
Paul Mundt | ab99c73 | 2008-07-30 19:55:30 +0900 | [diff] [blame^] | 151 | #define _TIF_ALLWORK_MASK (_TIF_SYSCALL_TRACE | _TIF_SIGPENDING | \ |
| 152 | _TIF_NEED_RESCHED | _TIF_SYSCALL_AUDIT | \ |
| 153 | _TIF_SINGLESTEP | _TIF_RESTORE_SIGMASK | \ |
| 154 | _TIF_NOTIFY_RESUME) |
Paul Mundt | cec3fd3 | 2008-07-30 13:11:26 +0900 | [diff] [blame] | 155 | |
| 156 | /* work to do on interrupt/exception return */ |
| 157 | #define _TIF_WORK_MASK (_TIF_ALLWORK_MASK & ~(_TIF_SYSCALL_TRACE | \ |
| 158 | _TIF_SYSCALL_AUDIT | _TIF_SINGLESTEP)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 159 | |
| 160 | #endif /* __KERNEL__ */ |
| 161 | |
| 162 | #endif /* __ASM_SH_THREAD_INFO_H */ |