Merge branch 'for-next' of git://git.infradead.org/users/eparis/notify
[linux-drm-fsl-dcu.git] / arch / score / include / asm / thread_info.h
1 #ifndef _ASM_SCORE_THREAD_INFO_H
2 #define _ASM_SCORE_THREAD_INFO_H
3
4 #ifdef __KERNEL__
5
6 #define KU_MASK 0x08
7 #define KU_USER 0x08
8 #define KU_KERN 0x00
9
10 #include <asm/page.h>
11 #include <linux/const.h>
12
13 /* thread information allocation */
14 #define THREAD_SIZE_ORDER       (1)
15 #define THREAD_SIZE             (PAGE_SIZE << THREAD_SIZE_ORDER)
16 #define THREAD_MASK             (THREAD_SIZE - _AC(1,UL))
17
18 #ifndef __ASSEMBLY__
19
20 #include <asm/processor.h>
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
27  *   must also be changed
28  */
29 struct thread_info {
30         struct task_struct      *task;          /* main task structure */
31         struct exec_domain      *exec_domain;   /* execution domain */
32         unsigned long           flags;          /* low level flags */
33         unsigned long           tp_value;       /* thread pointer */
34         __u32                   cpu;            /* current CPU */
35
36         /* 0 => preemptable, < 0 => BUG */
37         int                     preempt_count;
38
39         /*
40          * thread address space:
41          * 0-0xBFFFFFFF for user-thead
42          * 0-0xFFFFFFFF for kernel-thread
43          */
44         mm_segment_t            addr_limit;
45         struct restart_block    restart_block;
46         struct pt_regs          *regs;
47 };
48
49 /*
50  * macros/functions for gaining access to the thread information structure
51  *
52  * preempt_count needs to be 1 initially, until the scheduler is functional.
53  */
54 #define INIT_THREAD_INFO(tsk)                   \
55 {                                               \
56         .task           = &tsk,                 \
57         .exec_domain    = &default_exec_domain, \
58         .cpu            = 0,                    \
59         .preempt_count  = 1,                    \
60         .addr_limit     = KERNEL_DS,            \
61         .restart_block  = {                     \
62                 .fn = do_no_restart_syscall,    \
63         },                                      \
64 }
65
66 #define init_thread_info        (init_thread_union.thread_info)
67 #define init_stack              (init_thread_union.stack)
68
69 /* How to get the thread information struct from C. */
70 register struct thread_info *__current_thread_info __asm__("r28");
71 #define current_thread_info()   __current_thread_info
72
73 #endif /* !__ASSEMBLY__ */
74
75 #define PREEMPT_ACTIVE          0x10000000
76
77 /*
78  * thread information flags
79  * - these are process state flags that various assembly files may need to
80  *   access
81  * - pending work-to-be-done flags are in LSW
82  * - other flags in MSW
83  */
84 #define TIF_SYSCALL_TRACE       0       /* syscall trace active */
85 #define TIF_SIGPENDING          1       /* signal pending */
86 #define TIF_NEED_RESCHED        2       /* rescheduling necessary */
87 #define TIF_NOTIFY_RESUME       5       /* callback before returning to user */
88 #define TIF_RESTORE_SIGMASK     9       /* restore signal mask in do_signal() */
89 #define TIF_MEMDIE              18      /* is terminating due to OOM killer */
90
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_NOTIFY_RESUME      (1<<TIF_NOTIFY_RESUME)
95
96 #define _TIF_WORK_MASK          (0x0000ffff)
97
98 #endif /* __KERNEL__ */
99
100 #endif /* _ASM_SCORE_THREAD_INFO_H */