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1 | #ifndef __ASM_SH_THREAD_INFO_H |
2 | #define __ASM_SH_THREAD_INFO_H | |
3 | ||
4 | /* SuperH version | |
5 | * Copyright (C) 2002 Niibe Yutaka | |
6 | * | |
7 | * The copyright of original i386 version is: | |
8 | * | |
9 | * Copyright (C) 2002 David Howells (dhowells@redhat.com) | |
10 | * - Incorporating suggestions made by Linus Torvalds and Dave Miller | |
11 | */ | |
12 | ||
13 | #ifdef __KERNEL__ | |
14 | ||
15 | #ifndef __ASSEMBLY__ | |
16 | #include <asm/processor.h> | |
17 | ||
18 | struct thread_info { | |
19 | struct task_struct *task; /* main task structure */ | |
20 | struct exec_domain *exec_domain; /* execution domain */ | |
21 | __u32 flags; /* low level flags */ | |
22 | __u32 cpu; | |
dcd497f9 | 23 | int preempt_count; /* 0 => preemptable, <0 => BUG */ |
1da177e4 LT |
24 | struct restart_block restart_block; |
25 | __u8 supervisor_stack[0]; | |
26 | }; | |
27 | ||
28 | #endif | |
29 | ||
37053cc8 | 30 | #define PREEMPT_ACTIVE 0x10000000 |
1da177e4 LT |
31 | |
32 | /* | |
33 | * macros/functions for gaining access to the thread information structure | |
34 | */ | |
35 | #ifndef __ASSEMBLY__ | |
36 | #define INIT_THREAD_INFO(tsk) \ | |
37 | { \ | |
38 | .task = &tsk, \ | |
39 | .exec_domain = &default_exec_domain, \ | |
40 | .flags = 0, \ | |
41 | .cpu = 0, \ | |
42 | .preempt_count = 1, \ | |
43 | .restart_block = { \ | |
44 | .fn = do_no_restart_syscall, \ | |
45 | }, \ | |
46 | } | |
47 | ||
48 | #define init_thread_info (init_thread_union.thread_info) | |
49 | #define init_stack (init_thread_union.stack) | |
50 | ||
51 | /* how to get the thread information struct from C */ | |
52 | static inline struct thread_info *current_thread_info(void) | |
53 | { | |
54 | struct thread_info *ti; | |
55 | __asm__("stc r7_bank, %0" : "=r" (ti)); | |
56 | return ti; | |
57 | } | |
58 | ||
59 | /* thread information allocation */ | |
60 | #define THREAD_SIZE (2*PAGE_SIZE) | |
61 | #define alloc_thread_info(ti) ((struct thread_info *) __get_free_pages(GFP_KERNEL,1)) | |
62 | #define free_thread_info(ti) free_pages((unsigned long) (ti), 1) | |
63 | #define get_thread_info(ti) get_task_struct((ti)->task) | |
64 | #define put_thread_info(ti) put_task_struct((ti)->task) | |
65 | ||
66 | #else /* !__ASSEMBLY__ */ | |
67 | ||
68 | /* how to get the thread information struct from ASM */ | |
69 | #define GET_THREAD_INFO(reg) \ | |
70 | stc r7_bank, reg | |
71 | ||
72 | #endif | |
73 | ||
74 | /* | |
75 | * thread information flags | |
76 | * - these are process state flags that various assembly files may need to access | |
77 | * - pending work-to-be-done flags are in LSW | |
78 | * - other flags in MSW | |
79 | */ | |
80 | #define TIF_SYSCALL_TRACE 0 /* syscall trace active */ | |
81 | #define TIF_NOTIFY_RESUME 1 /* resumption notification requested */ | |
82 | #define TIF_SIGPENDING 2 /* signal pending */ | |
83 | #define TIF_NEED_RESCHED 3 /* rescheduling necessary */ | |
84 | #define TIF_USEDFPU 16 /* FPU was used by this task this quantum (SMP) */ | |
85 | #define TIF_POLLING_NRFLAG 17 /* true if poll_idle() is polling TIF_NEED_RESCHED */ | |
86 | #define TIF_MEMDIE 18 | |
87 | #define TIF_USERSPACE 31 /* true if FS sets userspace */ | |
88 | ||
89 | #define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE) | |
90 | #define _TIF_NOTIFY_RESUME (1<<TIF_NOTIFY_RESUME) | |
91 | #define _TIF_SIGPENDING (1<<TIF_SIGPENDING) | |
92 | #define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED) | |
93 | #define _TIF_USEDFPU (1<<TIF_USEDFPU) | |
94 | #define _TIF_POLLING_NRFLAG (1<<TIF_POLLING_NRFLAG) | |
95 | #define _TIF_USERSPACE (1<<TIF_USERSPACE) | |
96 | ||
97 | #define _TIF_WORK_MASK 0x000000FE /* work to do on interrupt/exception return */ | |
98 | #define _TIF_ALLWORK_MASK 0x000000FF /* work to do on any return to u-space */ | |
99 | ||
100 | #endif /* __KERNEL__ */ | |
101 | ||
102 | #endif /* __ASM_SH_THREAD_INFO_H */ |