Commit | Line | Data |
---|---|---|
1da177e4 LT |
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 | ||
b69c49b7 FT |
14 | #define __HAVE_ARCH_THREAD_INFO_ALLOCATOR |
15 | ||
1da177e4 LT |
16 | #ifndef __ASSEMBLY__ |
17 | #include <asm/types.h> | |
18 | #include <asm/processor.h> | |
19 | #include <asm/arch/thread_info.h> | |
20 | #include <asm/segment.h> | |
21 | #endif | |
22 | ||
23 | ||
24 | /* | |
25 | * low level task data that entry.S needs immediate access to | |
26 | * - this struct should fit entirely inside of one cache line | |
27 | * - this struct shares the supervisor stack pages | |
28 | * - if the contents of this structure are changed, the assembly constants must also be changed | |
29 | */ | |
30 | #ifndef __ASSEMBLY__ | |
31 | struct thread_info { | |
32 | struct task_struct *task; /* main task structure */ | |
33 | struct exec_domain *exec_domain; /* execution domain */ | |
34 | unsigned long flags; /* low level flags */ | |
35 | __u32 cpu; /* current CPU */ | |
dcd497f9 | 36 | int preempt_count; /* 0 => preemptable, <0 => BUG */ |
7b275523 | 37 | __u32 tls; /* TLS for this thread */ |
1da177e4 LT |
38 | |
39 | mm_segment_t addr_limit; /* thread address space: | |
40 | 0-0xBFFFFFFF for user-thead | |
41 | 0-0xFFFFFFFF for kernel-thread | |
42 | */ | |
43 | struct restart_block restart_block; | |
44 | __u8 supervisor_stack[0]; | |
45 | }; | |
46 | ||
47 | #endif | |
48 | ||
5d01e6ce | 49 | #define PREEMPT_ACTIVE 0x10000000 |
1da177e4 LT |
50 | |
51 | /* | |
52 | * macros/functions for gaining access to the thread information structure | |
53 | * | |
54 | * preempt_count needs to be 1 initially, until the scheduler is functional. | |
55 | */ | |
56 | #ifndef __ASSEMBLY__ | |
57 | #define INIT_THREAD_INFO(tsk) \ | |
58 | { \ | |
59 | .task = &tsk, \ | |
60 | .exec_domain = &default_exec_domain, \ | |
61 | .flags = 0, \ | |
62 | .cpu = 0, \ | |
63 | .preempt_count = 1, \ | |
64 | .addr_limit = KERNEL_DS, \ | |
65 | .restart_block = { \ | |
66 | .fn = do_no_restart_syscall, \ | |
67 | }, \ | |
68 | } | |
69 | ||
70 | #define init_thread_info (init_thread_union.thread_info) | |
71 | ||
72 | /* thread information allocation */ | |
73 | #define alloc_thread_info(tsk) ((struct thread_info *) __get_free_pages(GFP_KERNEL,1)) | |
74 | #define free_thread_info(ti) free_pages((unsigned long) (ti), 1) | |
1da177e4 LT |
75 | |
76 | #endif /* !__ASSEMBLY__ */ | |
77 | ||
78 | /* | |
79 | * thread information flags | |
80 | * - these are process state flags that various assembly files may need to 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 */ | |
7b275523 JN |
85 | #define TIF_NOTIFY_RESUME 1 /* resumption notification requested */ |
86 | #define TIF_SIGPENDING 2 /* signal pending */ | |
87 | #define TIF_NEED_RESCHED 3 /* rescheduling necessary */ | |
88 | #define TIF_RESTORE_SIGMASK 9 /* restore signal mask in do_signal() */ | |
1da177e4 LT |
89 | #define TIF_POLLING_NRFLAG 16 /* true if poll_idle() is polling TIF_NEED_RESCHED */ |
90 | #define TIF_MEMDIE 17 | |
91 | ||
92 | #define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE) | |
7b275523 | 93 | #define _TIF_NOTIFY_RESUME (1<<TIF_NOTIFY_RESUME) |
1da177e4 LT |
94 | #define _TIF_SIGPENDING (1<<TIF_SIGPENDING) |
95 | #define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED) | |
7b275523 | 96 | #define _TIF_RESTORE_SIGMASK (1<<TIF_RESTORE_SIGMASK) |
1da177e4 LT |
97 | #define _TIF_POLLING_NRFLAG (1<<TIF_POLLING_NRFLAG) |
98 | ||
99 | #define _TIF_WORK_MASK 0x0000FFFE /* work to do on interrupt/exception return */ | |
100 | #define _TIF_ALLWORK_MASK 0x0000FFFF /* work to do on any return to u-space */ | |
101 | ||
102 | #endif /* __KERNEL__ */ | |
103 | ||
104 | #endif /* _ASM_THREAD_INFO_H */ |