blob: 0a894cafb1ddcbc43b40303b62db4678d272ea72 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001#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 Torvalds1da177e2005-04-16 15:20:36 -070012#ifdef __KERNEL__
Paul Mundta6a311392006-09-27 18:22:14 +090013#include <asm/page.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070014
15#ifndef __ASSEMBLY__
16#include <asm/processor.h>
17
18struct thread_info {
19 struct task_struct *task; /* main task structure */
20 struct exec_domain *exec_domain; /* execution domain */
Akinobu Mita6ecf66a2006-03-26 01:39:51 -080021 unsigned long flags; /* low level flags */
Linus Torvalds1da177e2005-04-16 15:20:36 -070022 __u32 cpu;
Jesper Juhldcd497f2005-06-23 00:09:07 -070023 int preempt_count; /* 0 => preemptable, <0 => BUG */
Paul Mundt2991be72006-09-27 17:07:07 +090024 mm_segment_t addr_limit; /* thread address space */
Linus Torvalds1da177e2005-04-16 15:20:36 -070025 struct restart_block restart_block;
Paul Mundta6a311392006-09-27 18:22:14 +090026 unsigned long previous_sp; /* sp of previous stack in case
27 of nested IRQ stacks */
Linus Torvalds1da177e2005-04-16 15:20:36 -070028 __u8 supervisor_stack[0];
29};
30
31#endif
32
Paul Mundt37053cc2005-05-28 15:52:01 -070033#define PREEMPT_ACTIVE 0x10000000
Paul Mundta6a311392006-09-27 18:22:14 +090034
Paul Mundt7a847f82006-12-26 15:29:19 +090035#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 Mundt66dfe182008-06-03 18:54:02 +090041#elif defined(CONFIG_PAGE_SIZE_16KB)
42#define THREAD_SIZE_ORDER (0)
Paul Mundt7a847f82006-12-26 15:29:19 +090043#elif defined(CONFIG_PAGE_SIZE_64KB)
44#define THREAD_SIZE_ORDER (0)
Paul Mundta6a311392006-09-27 18:22:14 +090045#else
Paul Mundt7a847f82006-12-26 15:29:19 +090046#error "Unknown thread size"
Paul Mundta6a311392006-09-27 18:22:14 +090047#endif
Paul Mundt7a847f82006-12-26 15:29:19 +090048
49#define THREAD_SIZE (PAGE_SIZE << THREAD_SIZE_ORDER)
50#define STACK_WARN (THREAD_SIZE >> 3)
Linus Torvalds1da177e2005-04-16 15:20:36 -070051
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 Mundt2991be72006-09-27 17:07:07 +090063 .addr_limit = KERNEL_DS, \
Linus Torvalds1da177e2005-04-16 15:20:36 -070064 .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 Mundta6a311392006-09-27 18:22:14 +090072/* how to get the current stack pointer from C */
Adrian Bunk3ff6eec2008-01-24 22:16:20 +010073register unsigned long current_stack_pointer asm("r15") __used;
Paul Mundta6a311392006-09-27 18:22:14 +090074
Linus Torvalds1da177e2005-04-16 15:20:36 -070075/* how to get the thread information struct from C */
76static inline struct thread_info *current_thread_info(void)
77{
78 struct thread_info *ti;
Paul Mundt114f1322007-11-09 13:40:50 +090079#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 Mundtf1517492006-09-27 16:01:12 +090083#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 Torvalds1da177e2005-04-16 15:20:36 -070094 return ti;
95}
96
FUJITA Tomonorib69c49b2008-07-25 01:45:40 -070097#define __HAVE_ARCH_THREAD_INFO_ALLOCATOR
98
Linus Torvalds1da177e2005-04-16 15:20:36 -070099/* thread information allocation */
Paul Mundtd153ea82006-09-27 18:20:16 +0900100#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 Torvalds1da177e2005-04-16 15:20:36 -0700106
Paul Mundt510c72ad2006-11-27 12:06:26 +0900107#endif /* __ASSEMBLY__ */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700108
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 Eraniana583f1b2007-07-31 00:38:00 -0700116#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 Mundtc4637d42008-07-30 15:30:52 +0900120#define TIF_SYSCALL_AUDIT 5 /* syscall auditing active */
121#define TIF_SECCOMP 6 /* secure computing */
Paul Mundtab99c732008-07-30 19:55:30 +0900122#define TIF_NOTIFY_RESUME 7 /* callback before returning to user */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700123#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 Mundtab99c732008-07-30 19:55:30 +0900126#define TIF_FREEZE 19 /* Freezing for suspend */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700127
Paul Mundtcec3fd32008-07-30 13:11:26 +0900128#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 Mundtc4637d42008-07-30 15:30:52 +0900134#define _TIF_SECCOMP (1 << TIF_SECCOMP)
Paul Mundtab99c732008-07-30 19:55:30 +0900135#define _TIF_NOTIFY_RESUME (1 << TIF_NOTIFY_RESUME)
Paul Mundtcec3fd32008-07-30 13:11:26 +0900136#define _TIF_USEDFPU (1 << TIF_USEDFPU)
137#define _TIF_POLLING_NRFLAG (1 << TIF_POLLING_NRFLAG)
138#define _TIF_FREEZE (1 << TIF_FREEZE)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700139
Paul Mundtcec3fd32008-07-30 13:11:26 +0900140/*
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 Mundtc4637d42008-07-30 15:30:52 +0900148 _TIF_SYSCALL_AUDIT | _TIF_SECCOMP)
Paul Mundtcec3fd32008-07-30 13:11:26 +0900149
150/* work to do on any return to u-space */
Paul Mundtab99c732008-07-30 19:55:30 +0900151#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 Mundtcec3fd32008-07-30 13:11:26 +0900155
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 Torvalds1da177e2005-04-16 15:20:36 -0700159
160#endif /* __KERNEL__ */
161
162#endif /* __ASM_SH_THREAD_INFO_H */