[people/arne_f/kernel.git] / arch / h8300 / include / asm / thread_info.h

/* SPDX-License-Identifier: GPL-2.0 */
/* thread_info.h: h8300 low-level thread information
 * adapted from the i386 and PPC versions by Yoshinori Sato <ysato@users.sourceforge.jp>
 *
 * Copyright (C) 2002  David Howells (dhowells@redhat.com)
 * - Incorporating suggestions made by Linus Torvalds and Dave Miller
 */

#ifndef _ASM_THREAD_INFO_H
#define _ASM_THREAD_INFO_H

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

#ifdef __KERNEL__

/*
 * Size of kernel stack for each process. This must be a power of 2...
 */
#define THREAD_SIZE_ORDER	1
#define THREAD_SIZE		8192	/* 2 pages */

#ifndef __ASSEMBLY__

/*
 * low level task data.
 * If you change this, change the TI_* offsets below to match.
 */
struct thread_info {
	struct task_struct *task;		/* main task structure */
	unsigned long	   flags;		/* low level flags */
	int		   cpu;			/* cpu we're on */
	int		   preempt_count;	/* 0 => preemptable, <0 => BUG */
	mm_segment_t		addr_limit;
};

/*
 * macros/functions for gaining access to the thread information structure
 */
#define INIT_THREAD_INFO(tsk)			\
{						\
	.task =		&tsk,			\
	.flags =	0,			\
	.cpu =		0,			\
	.preempt_count = INIT_PREEMPT_COUNT,	\
	.addr_limit	= KERNEL_DS,		\
}

#define init_thread_info	(init_thread_union.thread_info)
#define init_stack		(init_thread_union.stack)

/* how to get the thread information struct from C */
static inline struct thread_info *current_thread_info(void)
{
	struct thread_info *ti;

	__asm__("mov.l	sp, %0\n\t"
		"and.w	%1, %T0"
		: "=&r"(ti)
		: "i" (~(THREAD_SIZE-1) & 0xffff));
	return ti;
}

#endif /* __ASSEMBLY__ */

/*
 * thread information flag bit numbers
 */
#define TIF_SYSCALL_TRACE	0	/* syscall trace active */
#define TIF_SIGPENDING		1	/* signal pending */
#define TIF_NEED_RESCHED	2	/* rescheduling necessary */
#define TIF_SINGLESTEP		3	/* singlestepping active */
#define TIF_MEMDIE		4	/* is terminating due to OOM killer */
#define TIF_RESTORE_SIGMASK	5	/* restore signal mask in do_signal() */
#define TIF_NOTIFY_RESUME	6	/* callback before returning to user */
#define TIF_SYSCALL_AUDIT	7	/* syscall auditing active */
#define TIF_SYSCALL_TRACEPOINT	8	/* for ftrace syscall instrumentation */
#define TIF_POLLING_NRFLAG	9	/* true if poll_idle() is polling TIF_NEED_RESCHED */

/* as above, but as bit values */
#define _TIF_SYSCALL_TRACE	(1 << TIF_SYSCALL_TRACE)
#define _TIF_SIGPENDING		(1 << TIF_SIGPENDING)
#define _TIF_NEED_RESCHED	(1 << TIF_NEED_RESCHED)
#define _TIF_NOTIFY_RESUME	(1 << TIF_NOTIFY_RESUME)
#define _TIF_SINGLESTEP		(1 << TIF_SINGLESTEP)
#define _TIF_SYSCALL_AUDIT	(1 << TIF_SYSCALL_AUDIT)
#define _TIF_SYSCALL_TRACEPOINT	(1 << TIF_SYSCALL_TRACEPOINT)
#define _TIF_POLLING_NRFLAG	(1 << TIF_POLLING_NRFLAG)

/* work to do in syscall trace */
#define _TIF_WORK_SYSCALL_MASK	(_TIF_SYSCALL_TRACE | _TIF_SINGLESTEP | \
				 _TIF_SYSCALL_AUDIT | _TIF_SYSCALL_TRACEPOINT)

/* work to do on any return to u-space */
#define _TIF_ALLWORK_MASK	(_TIF_SYSCALL_TRACE | _TIF_SIGPENDING      | \
				 _TIF_NEED_RESCHED  | _TIF_SYSCALL_AUDIT   | \
				 _TIF_SINGLESTEP    | _TIF_NOTIFY_RESUME   | \
				 _TIF_SYSCALL_TRACEPOINT)

/* work to do on interrupt/exception return */
#define _TIF_WORK_MASK		(_TIF_ALLWORK_MASK & ~(_TIF_SYSCALL_TRACE | \
				 _TIF_SYSCALL_AUDIT | _TIF_SINGLESTEP))

#endif /* __KERNEL__ */

#endif /* _ASM_THREAD_INFO_H */
Commit	Line	Data
b2441318	1	/* SPDX-License-Identifier: GPL-2.0 */
d2a5f499 YS	2	/* thread_info.h: h8300 low-level thread information
	3	* adapted from the i386 and PPC versions by Yoshinori Sato <ysato@users.sourceforge.jp>
	4	*
	5	* Copyright (C) 2002 David Howells (dhowells@redhat.com)
	6	* - Incorporating suggestions made by Linus Torvalds and Dave Miller
	7	*/
	8
	9	#ifndef _ASM_THREAD_INFO_H
	10	#define _ASM_THREAD_INFO_H
	11
	12	#include <asm/page.h>
	13	#include <asm/segment.h>
	14
	15	#ifdef __KERNEL__
	16
75078de4 YS	17	/*
	18	* Size of kernel stack for each process. This must be a power of 2...
	19	*/
	20	#define THREAD_SIZE_ORDER 1
	21	#define THREAD_SIZE 8192 /* 2 pages */
	22
d2a5f499 YS	23	#ifndef __ASSEMBLY__
	24
	25	/*
	26	* low level task data.
	27	* If you change this, change the TI_* offsets below to match.
	28	*/
	29	struct thread_info {
	30	struct task_struct task; / main task structure */
	31	unsigned long flags; /* low level flags */
	32	int cpu; /* cpu we're on */
	33	int preempt_count; /* 0 => preemptable, <0 => BUG */
	34	mm_segment_t addr_limit;
d2a5f499 YS	35	};
	36
	37	/*
	38	* macros/functions for gaining access to the thread information structure
	39	*/
	40	#define INIT_THREAD_INFO(tsk) \
	41	{ \
	42	.task = &tsk, \
	43	.flags = 0, \
	44	.cpu = 0, \
	45	.preempt_count = INIT_PREEMPT_COUNT, \
	46	.addr_limit = KERNEL_DS, \
d2a5f499 YS	47	}
	48
	49	#define init_thread_info (init_thread_union.thread_info)
	50	#define init_stack (init_thread_union.stack)
	51
d2a5f499 YS	52	/* how to get the thread information struct from C */
	53	static inline struct thread_info *current_thread_info(void)
	54	{
	55	struct thread_info *ti;
	56
	57	__asm__("mov.l sp, %0\n\t"
	58	"and.w %1, %T0"
	59	: "=&r"(ti)
	60	: "i" (~(THREAD_SIZE-1) & 0xffff));
	61	return ti;
	62	}
	63
	64	#endif /* __ASSEMBLY__ */
	65
	66	/*
	67	* thread information flag bit numbers
	68	*/
	69	#define TIF_SYSCALL_TRACE 0 /* syscall trace active */
	70	#define TIF_SIGPENDING 1 /* signal pending */
	71	#define TIF_NEED_RESCHED 2 /* rescheduling necessary */
	72	#define TIF_SINGLESTEP 3 /* singlestepping active */
	73	#define TIF_MEMDIE 4 /* is terminating due to OOM killer */
	74	#define TIF_RESTORE_SIGMASK 5 /* restore signal mask in do_signal() */
	75	#define TIF_NOTIFY_RESUME 6 /* callback before returning to user */
	76	#define TIF_SYSCALL_AUDIT 7 /* syscall auditing active */
	77	#define TIF_SYSCALL_TRACEPOINT 8 /* for ftrace syscall instrumentation */
	78	#define TIF_POLLING_NRFLAG 9 /* true if poll_idle() is polling TIF_NEED_RESCHED */
	79
	80	/* as above, but as bit values */
	81	#define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE)
	82	#define _TIF_SIGPENDING (1 << TIF_SIGPENDING)
	83	#define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED)
	84	#define _TIF_NOTIFY_RESUME (1 << TIF_NOTIFY_RESUME)
	85	#define _TIF_SINGLESTEP (1 << TIF_SINGLESTEP)
	86	#define _TIF_SYSCALL_AUDIT (1 << TIF_SYSCALL_AUDIT)
	87	#define _TIF_SYSCALL_TRACEPOINT (1 << TIF_SYSCALL_TRACEPOINT)
	88	#define _TIF_POLLING_NRFLAG (1 << TIF_POLLING_NRFLAG)
	89
	90	/* work to do in syscall trace */
	91	#define _TIF_WORK_SYSCALL_MASK (_TIF_SYSCALL_TRACE \| _TIF_SINGLESTEP \| \
	92	_TIF_SYSCALL_AUDIT \| _TIF_SYSCALL_TRACEPOINT)
	93
	94	/* work to do on any return to u-space */
	95	#define _TIF_ALLWORK_MASK (_TIF_SYSCALL_TRACE \| _TIF_SIGPENDING \| \
	96	_TIF_NEED_RESCHED \| _TIF_SYSCALL_AUDIT \| \
	97	_TIF_SINGLESTEP \| _TIF_NOTIFY_RESUME \| \
	98	_TIF_SYSCALL_TRACEPOINT)
	99
	100	/* work to do on interrupt/exception return */
	101	#define _TIF_WORK_MASK (_TIF_ALLWORK_MASK & ~(_TIF_SYSCALL_TRACE \| \
	102	_TIF_SYSCALL_AUDIT \| _TIF_SINGLESTEP))
	103
	104	#endif /* __KERNEL__ */
	105
	106	#endif /* _ASM_THREAD_INFO_H */