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Linus Torvalds1da177e2005-04-16 15:20:36 -07001#ifndef __ASM_SH64_THREAD_INFO_H
2#define __ASM_SH64_THREAD_INFO_H
3
4/*
5 * SuperH 5 version
6 * Copyright (C) 2003 Paul Mundt
7 */
8
9#ifdef __KERNEL__
10
11#ifndef __ASSEMBLY__
12#include <asm/registers.h>
13
14/*
15 * low level task data that entry.S needs immediate access to
16 * - this struct should fit entirely inside of one cache line
17 * - this struct shares the supervisor stack pages
18 * - if the contents of this structure are changed, the assembly constants must also be changed
19 */
20struct thread_info {
21 struct task_struct *task; /* main task structure */
22 struct exec_domain *exec_domain; /* execution domain */
23 unsigned long flags; /* low level flags */
24 /* Put the 4 32-bit fields together to make asm offsetting easier. */
Jesper Juhldcd497f2005-06-23 00:09:07 -070025 int preempt_count; /* 0 => preemptable, <0 => BUG */
Linus Torvalds1da177e2005-04-16 15:20:36 -070026 __u16 cpu;
27
28 mm_segment_t addr_limit;
29 struct restart_block restart_block;
30
31 __u8 supervisor_stack[0];
32};
33
34/*
35 * macros/functions for gaining access to the thread information structure
36 */
37#define INIT_THREAD_INFO(tsk) \
38{ \
39 .task = &tsk, \
40 .exec_domain = &default_exec_domain, \
41 .flags = 0, \
42 .cpu = 0, \
43 .preempt_count = 1, \
44 .addr_limit = KERNEL_DS, \
45 .restart_block = { \
46 .fn = do_no_restart_syscall, \
47 }, \
48}
49
50#define init_thread_info (init_thread_union.thread_info)
51#define init_stack (init_thread_union.stack)
52
53/* how to get the thread information struct from C */
54static inline struct thread_info *current_thread_info(void)
55{
56 struct thread_info *ti;
57
58 __asm__ __volatile__ ("getcon " __KCR0 ", %0\n\t" : "=r" (ti));
59
60 return ti;
61}
62
63/* thread information allocation */
64
65
66
67#define alloc_thread_info(ti) ((struct thread_info *) __get_free_pages(GFP_KERNEL,1))
68#define free_thread_info(ti) free_pages((unsigned long) (ti), 1)
Linus Torvalds1da177e2005-04-16 15:20:36 -070069
70#endif /* __ASSEMBLY__ */
71
72#define THREAD_SIZE 8192
73
Paul Mundt37053cc2005-05-28 15:52:01 -070074#define PREEMPT_ACTIVE 0x10000000
Linus Torvalds1da177e2005-04-16 15:20:36 -070075
76/* thread information flags */
77#define TIF_SYSCALL_TRACE 0 /* syscall trace active */
78#define TIF_SIGPENDING 2 /* signal pending */
79#define TIF_NEED_RESCHED 3 /* rescheduling necessary */
80#define TIF_MEMDIE 4
81
82
83#endif /* __KERNEL__ */
84
85#endif /* __ASM_SH64_THREAD_INFO_H */