Merge branch 'topic/azt3328' into for-linus
[pandora-kernel.git] / arch / m68k / include / asm / thread_info_no.h
1 /* thread_info.h: m68knommu low-level thread information
2  * adapted from the i386 and PPC versions by Greg Ungerer (gerg@snapgear.com)
3  *
4  * Copyright (C) 2002  David Howells (dhowells@redhat.com)
5  * - Incorporating suggestions made by Linus Torvalds and Dave Miller
6  */
7
8 #ifndef _ASM_THREAD_INFO_H
9 #define _ASM_THREAD_INFO_H
10
11 #include <asm/page.h>
12
13 #ifdef __KERNEL__
14
15 #ifndef __ASSEMBLY__
16
17 /*
18  * Size of kernel stack for each process. This must be a power of 2...
19  */
20 #ifdef CONFIG_4KSTACKS
21 #define THREAD_SIZE_ORDER (0)
22 #else
23 #define THREAD_SIZE_ORDER (1)
24 #endif
25                                                                                 
26 /*
27  * for asm files, THREAD_SIZE is now generated by asm-offsets.c
28  */
29 #define THREAD_SIZE (PAGE_SIZE<<THREAD_SIZE_ORDER)
30
31 /*
32  * low level task data.
33  */
34 struct thread_info {
35         struct task_struct *task;               /* main task structure */
36         struct exec_domain *exec_domain;        /* execution domain */
37         unsigned long      flags;               /* low level flags */
38         int                cpu;                 /* cpu we're on */
39         int                preempt_count;       /* 0 => preemptable, <0 => BUG */
40         struct restart_block restart_block;
41 };
42
43 /*
44  * macros/functions for gaining access to the thread information structure
45  */
46 #define INIT_THREAD_INFO(tsk)                   \
47 {                                               \
48         .task           = &tsk,                 \
49         .exec_domain    = &default_exec_domain, \
50         .flags          = 0,                    \
51         .cpu            = 0,                    \
52         .preempt_count  = INIT_PREEMPT_COUNT,   \
53         .restart_block  = {                     \
54                 .fn = do_no_restart_syscall,    \
55         },                                      \
56 }
57
58 #define init_thread_info        (init_thread_union.thread_info)
59 #define init_stack              (init_thread_union.stack)
60
61
62 /* how to get the thread information struct from C */
63 static inline struct thread_info *current_thread_info(void)
64 {
65         struct thread_info *ti;
66         __asm__(
67                 "move.l %%sp, %0 \n\t"
68                 "and.l  %1, %0"
69                 : "=&d"(ti)
70                 : "di" (~(THREAD_SIZE-1))
71                 );
72         return ti;
73 }
74
75 #endif /* __ASSEMBLY__ */
76
77 #define PREEMPT_ACTIVE  0x4000000
78
79 /*
80  * thread information flag bit numbers
81  */
82 #define TIF_SYSCALL_TRACE       0       /* syscall trace active */
83 #define TIF_SIGPENDING          1       /* signal pending */
84 #define TIF_NEED_RESCHED        2       /* rescheduling necessary */
85 #define TIF_POLLING_NRFLAG      3       /* true if poll_idle() is polling
86                                            TIF_NEED_RESCHED */
87 #define TIF_MEMDIE              4
88 #define TIF_FREEZE              16      /* is freezing for suspend */
89
90 /* as above, but as bit values */
91 #define _TIF_SYSCALL_TRACE      (1<<TIF_SYSCALL_TRACE)
92 #define _TIF_SIGPENDING         (1<<TIF_SIGPENDING)
93 #define _TIF_NEED_RESCHED       (1<<TIF_NEED_RESCHED)
94 #define _TIF_POLLING_NRFLAG     (1<<TIF_POLLING_NRFLAG)
95 #define _TIF_FREEZE             (1<<TIF_FREEZE)
96
97 #define _TIF_WORK_MASK          0x0000FFFE      /* work to do on interrupt/exception return */
98
99 #endif /* __KERNEL__ */
100
101 #endif /* _ASM_THREAD_INFO_H */