112 lines
3.3 KiB
C
112 lines
3.3 KiB
C
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/* thread_info.h: h8300 low-level thread information
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* adapted from the i386 and PPC versions by Yoshinori Sato <ysato@users.sourceforge.jp>
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*
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* Copyright (C) 2002 David Howells (dhowells@redhat.com)
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* - Incorporating suggestions made by Linus Torvalds and Dave Miller
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*/
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#ifndef _ASM_THREAD_INFO_H
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#define _ASM_THREAD_INFO_H
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#include <asm/page.h>
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#include <asm/segment.h>
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#ifdef __KERNEL__
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#ifndef __ASSEMBLY__
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/*
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* low level task data.
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* If you change this, change the TI_* offsets below to match.
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*/
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struct thread_info {
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struct task_struct *task; /* main task structure */
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unsigned long flags; /* low level flags */
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int cpu; /* cpu we're on */
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int preempt_count; /* 0 => preemptable, <0 => BUG */
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mm_segment_t addr_limit;
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struct restart_block restart_block;
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};
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/*
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* macros/functions for gaining access to the thread information structure
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*/
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#define INIT_THREAD_INFO(tsk) \
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{ \
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.task = &tsk, \
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.flags = 0, \
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.cpu = 0, \
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.preempt_count = INIT_PREEMPT_COUNT, \
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.addr_limit = KERNEL_DS, \
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.restart_block = { \
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.fn = do_no_restart_syscall, \
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}, \
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}
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#define init_thread_info (init_thread_union.thread_info)
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#define init_stack (init_thread_union.stack)
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/*
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* Size of kernel stack for each process. This must be a power of 2...
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*/
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#define THREAD_SIZE_ORDER 1
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#define THREAD_SIZE 8192 /* 2 pages */
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/* how to get the thread information struct from C */
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static inline struct thread_info *current_thread_info(void)
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{
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struct thread_info *ti;
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__asm__("mov.l sp, %0\n\t"
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"and.w %1, %T0"
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: "=&r"(ti)
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: "i" (~(THREAD_SIZE-1) & 0xffff));
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return ti;
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}
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#endif /* __ASSEMBLY__ */
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/*
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* thread information flag bit numbers
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*/
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#define TIF_SYSCALL_TRACE 0 /* syscall trace active */
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#define TIF_SIGPENDING 1 /* signal pending */
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#define TIF_NEED_RESCHED 2 /* rescheduling necessary */
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#define TIF_SINGLESTEP 3 /* singlestepping active */
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#define TIF_MEMDIE 4 /* is terminating due to OOM killer */
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#define TIF_RESTORE_SIGMASK 5 /* restore signal mask in do_signal() */
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#define TIF_NOTIFY_RESUME 6 /* callback before returning to user */
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#define TIF_SYSCALL_AUDIT 7 /* syscall auditing active */
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#define TIF_SYSCALL_TRACEPOINT 8 /* for ftrace syscall instrumentation */
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#define TIF_POLLING_NRFLAG 9 /* true if poll_idle() is polling TIF_NEED_RESCHED */
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/* as above, but as bit values */
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#define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE)
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#define _TIF_SIGPENDING (1 << TIF_SIGPENDING)
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#define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED)
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#define _TIF_NOTIFY_RESUME (1 << TIF_NOTIFY_RESUME)
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#define _TIF_SINGLESTEP (1 << TIF_SINGLESTEP)
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#define _TIF_SYSCALL_AUDIT (1 << TIF_SYSCALL_AUDIT)
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#define _TIF_SYSCALL_TRACEPOINT (1 << TIF_SYSCALL_TRACEPOINT)
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#define _TIF_POLLING_NRFLAG (1 << TIF_POLLING_NRFLAG)
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/* work to do in syscall trace */
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#define _TIF_WORK_SYSCALL_MASK (_TIF_SYSCALL_TRACE | _TIF_SINGLESTEP | \
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_TIF_SYSCALL_AUDIT | _TIF_SYSCALL_TRACEPOINT)
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/* work to do on any return to u-space */
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#define _TIF_ALLWORK_MASK (_TIF_SYSCALL_TRACE | _TIF_SIGPENDING | \
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_TIF_NEED_RESCHED | _TIF_SYSCALL_AUDIT | \
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_TIF_SINGLESTEP | _TIF_NOTIFY_RESUME | \
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_TIF_SYSCALL_TRACEPOINT)
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/* work to do on interrupt/exception return */
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#define _TIF_WORK_MASK (_TIF_ALLWORK_MASK & ~(_TIF_SYSCALL_TRACE | \
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_TIF_SYSCALL_AUDIT | _TIF_SINGLESTEP))
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#endif /* __KERNEL__ */
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#endif /* _ASM_THREAD_INFO_H */
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