Add the rt linux 4.1.3-rt3 as base
[kvmfornfv.git] / kernel / arch / cris / include / asm / thread_info.h
1 /* thread_info.h: CRIS low-level thread information
2  *
3  * Copyright (C) 2002  David Howells (dhowells@redhat.com)
4  * - Incorporating suggestions made by Linus Torvalds and Dave Miller
5  * 
6  * CRIS port by Axis Communications
7  */
8
9 #ifndef _ASM_THREAD_INFO_H
10 #define _ASM_THREAD_INFO_H
11
12 #ifdef __KERNEL__
13
14 #ifndef __ASSEMBLY__
15 #include <asm/types.h>
16 #include <asm/processor.h>
17 #include <arch/thread_info.h>
18 #include <asm/segment.h>
19 #endif
20
21
22 /*
23  * low level task data that entry.S needs immediate access to
24  * - this struct should fit entirely inside of one cache line
25  * - this struct shares the supervisor stack pages
26  * - if the contents of this structure are changed, the assembly constants must also be changed
27  */
28 #ifndef __ASSEMBLY__
29 struct thread_info {
30         struct task_struct      *task;          /* main task structure */
31         unsigned long           flags;          /* low level flags */
32         __u32                   cpu;            /* current CPU */
33         int                     preempt_count;  /* 0 => preemptable, <0 => BUG */
34         __u32                   tls;            /* TLS for this thread */
35
36         mm_segment_t            addr_limit;     /* thread address space:
37                                                    0-0xBFFFFFFF for user-thead
38                                                    0-0xFFFFFFFF for kernel-thread
39                                                 */
40         __u8                    supervisor_stack[0];
41 };
42
43 #endif
44
45 /*
46  * macros/functions for gaining access to the thread information structure
47  */
48 #ifndef __ASSEMBLY__
49 #define INIT_THREAD_INFO(tsk)                           \
50 {                                                       \
51         .task           = &tsk,                         \
52         .flags          = 0,                            \
53         .cpu            = 0,                            \
54         .preempt_count  = INIT_PREEMPT_COUNT,           \
55         .addr_limit     = KERNEL_DS,                    \
56 }
57
58 #define init_thread_info        (init_thread_union.thread_info)
59
60 #endif /* !__ASSEMBLY__ */
61
62 /*
63  * thread information flags
64  * - these are process state flags that various assembly files may need to access
65  * - pending work-to-be-done flags are in LSW
66  * - other flags in MSW
67  */
68 #define TIF_SYSCALL_TRACE       0       /* syscall trace active */
69 #define TIF_NOTIFY_RESUME       1       /* resumption notification requested */
70 #define TIF_SIGPENDING          2       /* signal pending */
71 #define TIF_NEED_RESCHED        3       /* rescheduling necessary */
72 #define TIF_RESTORE_SIGMASK     9       /* restore signal mask in do_signal() */
73 #define TIF_MEMDIE              17      /* is terminating due to OOM killer */
74
75 #define _TIF_SYSCALL_TRACE      (1<<TIF_SYSCALL_TRACE)
76 #define _TIF_NOTIFY_RESUME      (1<<TIF_NOTIFY_RESUME)
77 #define _TIF_SIGPENDING         (1<<TIF_SIGPENDING)
78 #define _TIF_NEED_RESCHED       (1<<TIF_NEED_RESCHED)
79
80 #define _TIF_WORK_MASK          0x0000FFFE      /* work to do on interrupt/exception return */
81 #define _TIF_ALLWORK_MASK       0x0000FFFF      /* work to do on any return to u-space */
82
83 #endif /* __KERNEL__ */
84
85 #endif /* _ASM_THREAD_INFO_H */