[linux-2.6-block.git] / 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>

/*
 * 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_ORDER	0
#else
#define THREAD_SIZE_ORDER	1
#endif
#else
#define THREAD_SIZE_ORDER	0
#endif

#define THREAD_SIZE	(PAGE_SIZE << THREAD_SIZE_ORDER)

#ifndef __ASSEMBLY__

struct thread_info {
	struct task_struct	*task;		/* main task structure */
	unsigned long		flags;
	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,			\
	.preempt_count	= INIT_PREEMPT_COUNT,	\
}

#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;
}
#endif

/* 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_SIGNAL	4
#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_SECCOMP		13	/* seccomp syscall filtering active */
#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 */

#define _TIF_NOTIFY_RESUME	(1 << TIF_NOTIFY_RESUME)
#define _TIF_SIGPENDING		(1 << TIF_SIGPENDING)
#define _TIF_NEED_RESCHED	(1 << TIF_NEED_RESCHED)
#define _TIF_SECCOMP		(1 << TIF_SECCOMP)
#define _TIF_DELAYED_TRACE	(1 << TIF_DELAYED_TRACE)
#define _TIF_SYSCALL_TRACE	(1 << TIF_SYSCALL_TRACE)
#define _TIF_MEMDIE		(1 << TIF_MEMDIE)
#define _TIF_RESTORE_SIGMASK	(1 << TIF_RESTORE_SIGMASK)

#endif	/* _ASM_M68K_THREAD_INFO_H */
Commit	Line	Data
b2441318	1	/* SPDX-License-Identifier: GPL-2.0 */
cddafa35 GU	2	#ifndef _ASM_M68K_THREAD_INFO_H
	3	#define _ASM_M68K_THREAD_INFO_H
	4
	5	#include <asm/types.h>
	6	#include <asm/page.h>
	7
	8	/*
	9	* On machines with 4k pages we default to an 8k thread size, though we
	10	* allow a 4k with config option. Any other machine page size then
	11	* the thread size must match the page size (which is 8k and larger here).
	12	*/
	13	#if PAGE_SHIFT < 13
	14	#ifdef CONFIG_4KSTACKS
70d830e3	15	#define THREAD_SIZE_ORDER 0
49148020	16	#else
70d830e3	17	#define THREAD_SIZE_ORDER 1
49148020	18	#endif
cddafa35	19	#else
70d830e3	20	#define THREAD_SIZE_ORDER 0
cddafa35	21	#endif
70d830e3 DL	22
70d830e3 DL	23	#define THREAD_SIZE (PAGE_SIZE << THREAD_SIZE_ORDER)
cddafa35 GU	24
	25	#ifndef __ASSEMBLY__
	26
	27	struct thread_info {
	28	struct task_struct task; / main task structure */
	29	unsigned long flags;
cddafa35 GU	30	int preempt_count; /* 0 => preemptable, <0 => BUG */
	31	__u32 cpu; /* should always be 0 on m68k */
	32	unsigned long tp_value; /* thread pointer */
cddafa35 GU	33	};
	34	#endif /* __ASSEMBLY__ */
	35
cddafa35 GU	36	#define INIT_THREAD_INFO(tsk) \
	37	{ \
	38	.task = &tsk, \
cddafa35	39	.preempt_count = INIT_PREEMPT_COUNT, \
cddafa35 GU	40	}
cddafa35 GU	41
cddafa35 GU	42	#ifndef __ASSEMBLY__
	43	/* how to get the thread information struct from C */
	44	static inline struct thread_info *current_thread_info(void)
	45	{
	46	struct thread_info *ti;
	47	__asm__(
	48	"move.l %%sp, %0 \n\t"
	49	"and.l %1, %0"
	50	: "=&d"(ti)
	51	: "di" (~(THREAD_SIZE-1))
	52	);
	53	return ti;
	54	}
	55	#endif
	56
cddafa35 GU	57	/* entry.S relies on these definitions!
	58	* bits 0-7 are tested at every exception exit
	59	* bits 8-15 are also tested at syscall exit
	60	*/
e660653c	61	#define TIF_NOTIFY_SIGNAL 4
a54f1655	62	#define TIF_NOTIFY_RESUME 5 /* callback before returning to user */
cddafa35 GU	63	#define TIF_SIGPENDING 6 /* signal pending */
cddafa35 GU	64	#define TIF_NEED_RESCHED 7 /* rescheduling necessary */
6baaade1	65	#define TIF_SECCOMP 13 /* seccomp syscall filtering active */
cddafa35 GU	66	#define TIF_DELAYED_TRACE 14 /* single step a syscall */
	67	#define TIF_SYSCALL_TRACE 15 /* syscall trace active */
	68	#define TIF_MEMDIE 16 /* is terminating due to OOM killer */
e68847fe	69	#define TIF_RESTORE_SIGMASK 18 /* restore signal mask in do_signal */
cddafa35	70
62148d98 GU	71	#define _TIF_NOTIFY_RESUME (1 << TIF_NOTIFY_RESUME)
	72	#define _TIF_SIGPENDING (1 << TIF_SIGPENDING)
	73	#define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED)
6baaade1	74	#define _TIF_SECCOMP (1 << TIF_SECCOMP)
62148d98 GU	75	#define _TIF_DELAYED_TRACE (1 << TIF_DELAYED_TRACE)
	76	#define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE)
	77	#define _TIF_MEMDIE (1 << TIF_MEMDIE)
	78	#define _TIF_RESTORE_SIGMASK (1 << TIF_RESTORE_SIGMASK)
	79
cddafa35	80	#endif /* _ASM_M68K_THREAD_INFO_H */