Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* thread_info.h: h8300 low-level thread information |
2 | * adapted from the i386 and PPC versions by Yoshinori Sato <ysato@users.sourceforge.jp> | |
3 | * | |
4 | * Copyright (C) 2002 David Howells (dhowells@redhat.com) | |
5 | * - Incorporating suggestions made by Linus Torvalds and Dave Miller | |
6 | */ | |
7 | ||
8 | #ifndef _ASM_THREAD_INFO_H | |
9 | #define _ASM_THREAD_INFO_H | |
10 | ||
11 | #include <asm/page.h> | |
12 | ||
13 | #ifdef __KERNEL__ | |
14 | ||
15 | #ifndef __ASSEMBLY__ | |
16 | ||
17 | /* | |
18 | * low level task data. | |
19 | * If you change this, change the TI_* offsets below to match. | |
20 | */ | |
21 | struct thread_info { | |
22 | struct task_struct *task; /* main task structure */ | |
23 | struct exec_domain *exec_domain; /* execution domain */ | |
24 | unsigned long flags; /* low level flags */ | |
25 | int cpu; /* cpu we're on */ | |
dcd497f9 | 26 | int preempt_count; /* 0 => preemptable, <0 => BUG */ |
1da177e4 LT |
27 | struct restart_block restart_block; |
28 | }; | |
29 | ||
30 | /* | |
31 | * macros/functions for gaining access to the thread information structure | |
32 | */ | |
33 | #define INIT_THREAD_INFO(tsk) \ | |
34 | { \ | |
35 | .task = &tsk, \ | |
36 | .exec_domain = &default_exec_domain, \ | |
37 | .flags = 0, \ | |
38 | .cpu = 0, \ | |
39 | .preempt_count = 1, \ | |
40 | .restart_block = { \ | |
41 | .fn = do_no_restart_syscall, \ | |
42 | }, \ | |
43 | } | |
44 | ||
45 | #define init_thread_info (init_thread_union.thread_info) | |
46 | #define init_stack (init_thread_union.stack) | |
47 | ||
48 | ||
49 | /* | |
50 | * Size of kernel stack for each process. This must be a power of 2... | |
51 | */ | |
b69c49b7 | 52 | #define THREAD_SIZE_ORDER 1 |
1da177e4 LT |
53 | #define THREAD_SIZE 8192 /* 2 pages */ |
54 | ||
55 | ||
56 | /* how to get the thread information struct from C */ | |
57 | static inline struct thread_info *current_thread_info(void) | |
58 | { | |
59 | struct thread_info *ti; | |
60 | __asm__( | |
61 | "mov.l sp, %0 \n\t" | |
62 | "and.l %1, %0" | |
63 | : "=&r"(ti) | |
64 | : "i" (~(THREAD_SIZE-1)) | |
65 | ); | |
66 | return ti; | |
67 | } | |
68 | ||
1da177e4 LT |
69 | #endif /* __ASSEMBLY__ */ |
70 | ||
71 | /* | |
72 | * Offsets in thread_info structure, used in assembly code | |
73 | */ | |
74 | #define TI_TASK 0 | |
75 | #define TI_EXECDOMAIN 4 | |
76 | #define TI_FLAGS 8 | |
77 | #define TI_CPU 12 | |
78 | #define TI_PRE_COUNT 16 | |
79 | ||
80 | #define PREEMPT_ACTIVE 0x4000000 | |
81 | ||
82 | /* | |
83 | * thread information flag bit numbers | |
84 | */ | |
85 | #define TIF_SYSCALL_TRACE 0 /* syscall trace active */ | |
a583f1b5 SE |
86 | #define TIF_SIGPENDING 1 /* signal pending */ |
87 | #define TIF_NEED_RESCHED 2 /* rescheduling necessary */ | |
88 | #define TIF_POLLING_NRFLAG 3 /* true if poll_idle() is polling | |
1da177e4 | 89 | TIF_NEED_RESCHED */ |
a583f1b5 SE |
90 | #define TIF_MEMDIE 4 |
91 | #define TIF_RESTORE_SIGMASK 5 /* restore signal mask in do_signal() */ | |
1da177e4 LT |
92 | |
93 | /* as above, but as bit values */ | |
94 | #define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE) | |
1da177e4 LT |
95 | #define _TIF_SIGPENDING (1<<TIF_SIGPENDING) |
96 | #define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED) | |
97 | #define _TIF_POLLING_NRFLAG (1<<TIF_POLLING_NRFLAG) | |
2fea299f | 98 | #define _TIF_RESTORE_SIGMASK (1<<TIF_RESTORE_SIGMASK) |
1da177e4 LT |
99 | |
100 | #define _TIF_WORK_MASK 0x0000FFFE /* work to do on interrupt/exception return */ | |
101 | ||
102 | #endif /* __KERNEL__ */ | |
103 | ||
104 | #endif /* _ASM_THREAD_INFO_H */ |