[PATCH] death of get_thread_info/put_thread_info
[linux-3.10.git] / include / asm-sh64 / thread_info.h
1 #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  */
20 struct 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. */
25         int                     preempt_count;  /* 0 => preemptable, <0 => BUG */
26         __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 */
54 static 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)
69
70 #endif /* __ASSEMBLY__ */
71
72 #define THREAD_SIZE  8192
73
74 #define PREEMPT_ACTIVE          0x10000000
75
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 */