projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| d2a5f499 YS |
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 | #include <asm/segment.h> | |
| 13 | ||
| 14 | #ifdef __KERNEL__ | |
| 15 | ||
| 75078de4 YS |
16 | /* |
| 17 | * Size of kernel stack for each process. This must be a power of 2... | |
| 18 | */ | |
| 19 | #define THREAD_SIZE_ORDER 1 | |
| 20 | #define THREAD_SIZE 8192 /* 2 pages */ | |
| 21 | ||
| d2a5f499 YS |
22 | #ifndef __ASSEMBLY__ |
| 23 | ||
| 24 | /* | |
| 25 | * low level task data. | |
| 26 | * If you change this, change the TI_* offsets below to match. | |
| 27 | */ | |
| 28 | struct thread_info { | |
| 29 | struct task_struct *task; /* main task structure */ | |
| 30 | unsigned long flags; /* low level flags */ | |
| 31 | int cpu; /* cpu we're on */ | |
| 32 | int preempt_count; /* 0 => preemptable, <0 => BUG */ | |
| 33 | mm_segment_t addr_limit; | |
| d2a5f499 YS |
34 | }; |
| 35 | ||
| 36 | /* | |
| 37 | * macros/functions for gaining access to the thread information structure | |
| 38 | */ | |
| 39 | #define INIT_THREAD_INFO(tsk) \ | |
| 40 | { \ | |
| 41 | .task = &tsk, \ | |
| 42 | .flags = 0, \ | |
| 43 | .cpu = 0, \ | |
| 44 | .preempt_count = INIT_PREEMPT_COUNT, \ | |
| 45 | .addr_limit = KERNEL_DS, \ | |
| d2a5f499 YS |
46 | } |
| 47 | ||
| 48 | #define init_thread_info (init_thread_union.thread_info) | |
| 49 | #define init_stack (init_thread_union.stack) | |
| 50 | ||
| d2a5f499 YS |
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 | ||
| 56 | __asm__("mov.l sp, %0\n\t" | |
| 57 | "and.w %1, %T0" | |
| 58 | : "=&r"(ti) | |
| 59 | : "i" (~(THREAD_SIZE-1) & 0xffff)); | |
| 60 | return ti; | |
| 61 | } | |
| 62 | ||
| 63 | #endif /* __ASSEMBLY__ */ | |
| 64 | ||
| 65 | /* | |
| 66 | * thread information flag bit numbers | |
| 67 | */ | |
| 68 | #define TIF_SYSCALL_TRACE 0 /* syscall trace active */ | |
| 69 | #define TIF_SIGPENDING 1 /* signal pending */ | |
| 70 | #define TIF_NEED_RESCHED 2 /* rescheduling necessary */ | |
| 71 | #define TIF_SINGLESTEP 3 /* singlestepping active */ | |
| 72 | #define TIF_MEMDIE 4 /* is terminating due to OOM killer */ | |
| 73 | #define TIF_RESTORE_SIGMASK 5 /* restore signal mask in do_signal() */ | |
| 74 | #define TIF_NOTIFY_RESUME 6 /* callback before returning to user */ | |
| 75 | #define TIF_SYSCALL_AUDIT 7 /* syscall auditing active */ | |
| 76 | #define TIF_SYSCALL_TRACEPOINT 8 /* for ftrace syscall instrumentation */ | |
| 77 | #define TIF_POLLING_NRFLAG 9 /* true if poll_idle() is polling TIF_NEED_RESCHED */ | |
| 78 | ||
| 79 | /* as above, but as bit values */ | |
| 80 | #define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE) | |
| 81 | #define _TIF_SIGPENDING (1 << TIF_SIGPENDING) | |
| 82 | #define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED) | |
| 83 | #define _TIF_NOTIFY_RESUME (1 << TIF_NOTIFY_RESUME) | |
| 84 | #define _TIF_SINGLESTEP (1 << TIF_SINGLESTEP) | |
| 85 | #define _TIF_SYSCALL_AUDIT (1 << TIF_SYSCALL_AUDIT) | |
| 86 | #define _TIF_SYSCALL_TRACEPOINT (1 << TIF_SYSCALL_TRACEPOINT) | |
| 87 | #define _TIF_POLLING_NRFLAG (1 << TIF_POLLING_NRFLAG) | |
| 88 | ||
| 89 | /* work to do in syscall trace */ | |
| 90 | #define _TIF_WORK_SYSCALL_MASK (_TIF_SYSCALL_TRACE | _TIF_SINGLESTEP | \ | |
| 91 | _TIF_SYSCALL_AUDIT | _TIF_SYSCALL_TRACEPOINT) | |
| 92 | ||
| 93 | /* work to do on any return to u-space */ | |
| 94 | #define _TIF_ALLWORK_MASK (_TIF_SYSCALL_TRACE | _TIF_SIGPENDING | \ | |
| 95 | _TIF_NEED_RESCHED | _TIF_SYSCALL_AUDIT | \ | |
| 96 | _TIF_SINGLESTEP | _TIF_NOTIFY_RESUME | \ | |
| 97 | _TIF_SYSCALL_TRACEPOINT) | |
| 98 | ||
| 99 | /* work to do on interrupt/exception return */ | |
| 100 | #define _TIF_WORK_MASK (_TIF_ALLWORK_MASK & ~(_TIF_SYSCALL_TRACE | \ | |
| 101 | _TIF_SYSCALL_AUDIT | _TIF_SINGLESTEP)) | |
| 102 | ||
| 103 | #endif /* __KERNEL__ */ | |
| 104 | ||
| 105 | #endif /* _ASM_THREAD_INFO_H */ |