Release 4.14 arch/m68k/include/asm/thread_info.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_M68K_THREAD_INFO_H

#define _ASM_M68K_THREAD_INFO_H

#include <asm/types.h>
#include <asm/page.h>
#include <asm/segment.h>

/*
 * On machines with 4k pages we default to an 8k thread size, though we
 * allow a 4k with config option. Any other machine page size then
 * the thread size must match the page size (which is 8k and larger here).
 */
#if PAGE_SHIFT < 13
#ifdef CONFIG_4KSTACKS

#define THREAD_SIZE	4096
#else

#define THREAD_SIZE	8192
#endif
#else

#define THREAD_SIZE	PAGE_SIZE
#endif

#define THREAD_SIZE_ORDER	((THREAD_SIZE / PAGE_SIZE) - 1)

#ifndef __ASSEMBLY__


struct thread_info {
	
struct task_struct	*task;		/* main task structure */
	
unsigned long		flags;
	
mm_segment_t		addr_limit;	/* thread address space */
	
int			preempt_count;	/* 0 => preemptable, <0 => BUG */
	
__u32			cpu;		/* should always be 0 on m68k */
	
unsigned long		tp_value;	/* thread pointer */
};
#endif /* __ASSEMBLY__ */


#define INIT_THREAD_INFO(tsk)			\
{                                               \
        .task           = &tsk,                 \
        .addr_limit     = KERNEL_DS,            \
        .preempt_count  = INIT_PREEMPT_COUNT,   \
}


#define init_stack		(init_thread_union.stack)

#ifndef __ASSEMBLY__
/* how to get the thread information struct from C */


static inline struct thread_info *current_thread_info(void)
{
	struct thread_info *ti;
	__asm__(
                "move.l %%sp, %0 \n\t"
                "and.l  %1, %0"
                : "=&d"(ti)
                : "di" (~(THREAD_SIZE-1))
                );
	return ti;
}
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#endif


#define init_thread_info	(init_thread_union.thread_info)

/* entry.S relies on these definitions!
 * bits 0-7 are tested at every exception exit
 * bits 8-15 are also tested at syscall exit
 */

#define TIF_NOTIFY_RESUME	5	
/* callback before returning to user */

#define TIF_SIGPENDING		6	
/* signal pending */

#define TIF_NEED_RESCHED	7	
/* rescheduling necessary */

#define TIF_DELAYED_TRACE	14	
/* single step a syscall */

#define TIF_SYSCALL_TRACE	15	
/* syscall trace active */

#define TIF_MEMDIE		16	
/* is terminating due to OOM killer */

#define TIF_RESTORE_SIGMASK	18	
/* restore signal mask in do_signal */

#endif	/* _ASM_M68K_THREAD_INFO_H */
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Directory: arch/m68k/include/asm

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