projects / linux-block.git / blame
| 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, \ | |
| c99e6efe | 39 | .preempt_count = INIT_PREEMPT_COUNT, \ |
| 1da177e4 LT |
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() */ | |
| d0420c83 | 92 | #define TIF_NOTIFY_RESUME 6 /* callback before returning to user */ |
| 83224b08 | 93 | #define TIF_FREEZE 16 /* is freezing for suspend */ |
| 1da177e4 LT |
94 | |
| 95 | /* as above, but as bit values */ | |
| 96 | #define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE) | |
| 1da177e4 LT |
97 | #define _TIF_SIGPENDING (1<<TIF_SIGPENDING) |
| 98 | #define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED) | |
| 99 | #define _TIF_POLLING_NRFLAG (1<<TIF_POLLING_NRFLAG) | |
| 2fea299f | 100 | #define _TIF_RESTORE_SIGMASK (1<<TIF_RESTORE_SIGMASK) |
| d0420c83 | 101 | #define _TIF_NOTIFY_RESUME (1 << TIF_NOTIFY_RESUME) |
| 83224b08 | 102 | #define _TIF_FREEZE (1<<TIF_FREEZE) |
| 1da177e4 LT |
103 | |
| 104 | #define _TIF_WORK_MASK 0x0000FFFE /* work to do on interrupt/exception return */ | |
| 105 | ||
| 106 | #endif /* __KERNEL__ */ | |
| 107 | ||
| 108 | #endif /* _ASM_THREAD_INFO_H */ |