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1da177e4 LT |
1 | #ifndef __ASM_SH64_THREAD_INFO_H |
2 | #define __ASM_SH64_THREAD_INFO_H | |
3 | ||
4 | /* | |
5 | * SuperH 5 version | |
6 | * Copyright (C) 2003 Paul Mundt | |
7 | */ | |
8 | ||
9 | #ifdef __KERNEL__ | |
10 | ||
11 | #ifndef __ASSEMBLY__ | |
12 | #include <asm/registers.h> | |
13 | ||
14 | /* | |
15 | * low level task data that entry.S needs immediate access to | |
16 | * - this struct should fit entirely inside of one cache line | |
17 | * - this struct shares the supervisor stack pages | |
18 | * - if the contents of this structure are changed, the assembly constants must also be changed | |
19 | */ | |
20 | struct thread_info { | |
21 | struct task_struct *task; /* main task structure */ | |
22 | struct exec_domain *exec_domain; /* execution domain */ | |
23 | unsigned long flags; /* low level flags */ | |
24 | /* Put the 4 32-bit fields together to make asm offsetting easier. */ | |
dcd497f9 | 25 | int preempt_count; /* 0 => preemptable, <0 => BUG */ |
1da177e4 LT |
26 | __u16 cpu; |
27 | ||
28 | mm_segment_t addr_limit; | |
29 | struct restart_block restart_block; | |
30 | ||
31 | __u8 supervisor_stack[0]; | |
32 | }; | |
33 | ||
34 | /* | |
35 | * macros/functions for gaining access to the thread information structure | |
36 | */ | |
37 | #define INIT_THREAD_INFO(tsk) \ | |
38 | { \ | |
39 | .task = &tsk, \ | |
40 | .exec_domain = &default_exec_domain, \ | |
41 | .flags = 0, \ | |
42 | .cpu = 0, \ | |
43 | .preempt_count = 1, \ | |
44 | .addr_limit = KERNEL_DS, \ | |
45 | .restart_block = { \ | |
46 | .fn = do_no_restart_syscall, \ | |
47 | }, \ | |
48 | } | |
49 | ||
50 | #define init_thread_info (init_thread_union.thread_info) | |
51 | #define init_stack (init_thread_union.stack) | |
52 | ||
53 | /* how to get the thread information struct from C */ | |
54 | static inline struct thread_info *current_thread_info(void) | |
55 | { | |
56 | struct thread_info *ti; | |
57 | ||
58 | __asm__ __volatile__ ("getcon " __KCR0 ", %0\n\t" : "=r" (ti)); | |
59 | ||
60 | return ti; | |
61 | } | |
62 | ||
63 | /* thread information allocation */ | |
64 | ||
65 | ||
66 | ||
67 | #define alloc_thread_info(ti) ((struct thread_info *) __get_free_pages(GFP_KERNEL,1)) | |
68 | #define free_thread_info(ti) free_pages((unsigned long) (ti), 1) | |
1da177e4 LT |
69 | |
70 | #endif /* __ASSEMBLY__ */ | |
71 | ||
72 | #define THREAD_SIZE 8192 | |
73 | ||
37053cc8 | 74 | #define PREEMPT_ACTIVE 0x10000000 |
1da177e4 LT |
75 | |
76 | /* thread information flags */ | |
77 | #define TIF_SYSCALL_TRACE 0 /* syscall trace active */ | |
78 | #define TIF_SIGPENDING 2 /* signal pending */ | |
79 | #define TIF_NEED_RESCHED 3 /* rescheduling necessary */ | |
80 | #define TIF_MEMDIE 4 | |
81 | ||
82 | ||
83 | #endif /* __KERNEL__ */ | |
84 | ||
85 | #endif /* __ASM_SH64_THREAD_INFO_H */ |