abd03753bd
a) added embedded thread_info [m68k processor.h] b) added missing symbols in asm-offsets.c c) task_thread_info() and friends in asm-m68k/thread_info.h d) made m68k thread_info.h included by m68k processor.h, not the other way round. Signed-off-by: Al Viro <viro@parcelfarce.linux.theplanet.co.uk> Signed-off-by: Roman Zippel <zippel@linux-m68k.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
125 lines
3.7 KiB
C
125 lines
3.7 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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struct thread_info {
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struct task_struct *task; /* main task structure */
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struct exec_domain *exec_domain; /* execution domain */
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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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struct restart_block restart_block;
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__u8 supervisor_stack[0];
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};
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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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.restart_block = { \
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.fn = do_no_restart_syscall, \
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}, \
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}
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/* THREAD_SIZE should be 8k, so handle differently for 4k and 8k machines */
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#if PAGE_SHIFT == 13 /* 8k machines */
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#define alloc_thread_info(tsk) ((struct thread_info *)__get_free_pages(GFP_KERNEL,0))
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#define free_thread_info(ti) free_pages((unsigned long)(ti),0)
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#else /* otherwise assume 4k pages */
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#define alloc_thread_info(tsk) ((struct thread_info *)__get_free_pages(GFP_KERNEL,1))
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#define free_thread_info(ti) free_pages((unsigned long)(ti),1)
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#endif /* PAGE_SHIFT == 13 */
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#define init_thread_info (init_task.thread.info)
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#define init_stack (init_thread_union.stack)
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#define task_thread_info(tsk) (&(tsk)->thread.info)
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#define current_thread_info() task_thread_info(current)
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#define __HAVE_THREAD_FUNCTIONS
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#define setup_thread_stack(p, org) ({ \
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*(struct task_struct **)(p)->thread_info = (p); \
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task_thread_info(p)->task = (p); \
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})
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#define end_of_stack(p) ((unsigned long *)(p)->thread_info + 1)
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#define TIF_SYSCALL_TRACE 0 /* syscall trace active */
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#define TIF_DELAYED_TRACE 1 /* single step a syscall */
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#define TIF_NOTIFY_RESUME 2 /* resumption notification requested */
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#define TIF_SIGPENDING 3 /* signal pending */
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#define TIF_NEED_RESCHED 4 /* rescheduling necessary */
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#define TIF_MEMDIE 5
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extern int thread_flag_fixme(void);
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/*
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* flag set/clear/test wrappers
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* - pass TIF_xxxx constants to these functions
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*/
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#define __set_tsk_thread_flag(tsk, flag, val) ({ \
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switch (flag) { \
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case TIF_SIGPENDING: \
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tsk->thread.work.sigpending = val; \
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break; \
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case TIF_NEED_RESCHED: \
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tsk->thread.work.need_resched = val; \
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break; \
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case TIF_SYSCALL_TRACE: \
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tsk->thread.work.syscall_trace = val; \
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break; \
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case TIF_MEMDIE: \
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tsk->thread.work.memdie = val; \
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break; \
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default: \
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thread_flag_fixme(); \
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} \
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})
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#define __get_tsk_thread_flag(tsk, flag) ({ \
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int ___res; \
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switch (flag) { \
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case TIF_SIGPENDING: \
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___res = tsk->thread.work.sigpending; \
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break; \
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case TIF_NEED_RESCHED: \
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___res = tsk->thread.work.need_resched; \
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break; \
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case TIF_SYSCALL_TRACE: \
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___res = tsk->thread.work.syscall_trace;\
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break; \
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case TIF_MEMDIE: \
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___res = tsk->thread.work.memdie;\
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break; \
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default: \
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___res = thread_flag_fixme(); \
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} \
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___res; \
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})
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#define __get_set_tsk_thread_flag(tsk, flag, val) ({ \
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int __res = __get_tsk_thread_flag(tsk, flag); \
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__set_tsk_thread_flag(tsk, flag, val); \
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__res; \
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})
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#define set_tsk_thread_flag(tsk, flag) __set_tsk_thread_flag(tsk, flag, ~0)
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#define clear_tsk_thread_flag(tsk, flag) __set_tsk_thread_flag(tsk, flag, 0)
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#define test_and_set_tsk_thread_flag(tsk, flag) __get_set_tsk_thread_flag(tsk, flag, ~0)
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#define test_tsk_thread_flag(tsk, flag) __get_tsk_thread_flag(tsk, flag)
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#define set_thread_flag(flag) set_tsk_thread_flag(current, flag)
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#define clear_thread_flag(flag) clear_tsk_thread_flag(current, flag)
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#define test_thread_flag(flag) test_tsk_thread_flag(current, flag)
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#define set_need_resched() set_thread_flag(TIF_NEED_RESCHED)
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#define clear_need_resched() clear_thread_flag(TIF_NEED_RESCHED)
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#endif /* _ASM_M68K_THREAD_INFO_H */
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