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