83 lines
2.2 KiB
C
83 lines
2.2 KiB
C
#ifndef _ASM_M68K_THREAD_INFO_H
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#define _ASM_M68K_THREAD_INFO_H
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#include <asm/types.h>
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#include <asm/page.h>
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#include <asm/segment.h>
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/*
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* On machines with 4k pages we default to an 8k thread size, though we
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* allow a 4k with config option. Any other machine page size then
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* the thread size must match the page size (which is 8k and larger here).
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*/
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#if PAGE_SHIFT < 13
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#ifdef CONFIG_4KSTACKS
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#define THREAD_SIZE 4096
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#else
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#define THREAD_SIZE 8192
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#endif
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#else
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#define THREAD_SIZE PAGE_SIZE
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#endif
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#define THREAD_SIZE_ORDER ((THREAD_SIZE / PAGE_SIZE) - 1)
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#ifndef __ASSEMBLY__
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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;
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struct exec_domain *exec_domain; /* execution domain */
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mm_segment_t addr_limit; /* thread address space */
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int preempt_count; /* 0 => preemptable, <0 => BUG */
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__u32 cpu; /* should always be 0 on m68k */
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unsigned long tp_value; /* thread pointer */
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struct restart_block restart_block;
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};
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#endif /* __ASSEMBLY__ */
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#define PREEMPT_ACTIVE 0x4000000
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#define INIT_THREAD_INFO(tsk) \
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{ \
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.task = &tsk, \
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.exec_domain = &default_exec_domain, \
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.addr_limit = KERNEL_DS, \
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.preempt_count = INIT_PREEMPT_COUNT, \
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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_stack (init_thread_union.stack)
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#ifndef __ASSEMBLY__
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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__(
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"move.l %%sp, %0 \n\t"
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"and.l %1, %0"
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: "=&d"(ti)
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: "di" (~(THREAD_SIZE-1))
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);
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return ti;
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}
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#endif
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#define init_thread_info (init_thread_union.thread_info)
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/* entry.S relies on these definitions!
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* bits 0-7 are tested at every exception exit
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* bits 8-15 are also tested at syscall exit
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*/
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#define TIF_NOTIFY_RESUME 5 /* callback before returning to user */
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#define TIF_SIGPENDING 6 /* signal pending */
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#define TIF_NEED_RESCHED 7 /* rescheduling necessary */
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#define TIF_DELAYED_TRACE 14 /* single step a syscall */
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#define TIF_SYSCALL_TRACE 15 /* syscall trace active */
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#define TIF_MEMDIE 16 /* is terminating due to OOM killer */
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#define TIF_RESTORE_SIGMASK 18 /* restore signal mask in do_signal */
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#endif /* _ASM_M68K_THREAD_INFO_H */
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