NetBSD/sys/arch/news68k/include/intr.h

/*	$NetBSD: intr.h,v 1.13 2006/12/21 15:55:23 yamt Exp $	*/

/*
 *
 * Copyright (c) 1998 NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by Minoura Makoto and Jason R. Thorpe.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *      This product includes software developed by The NetBSD Foundation
 *	Inc. and its contributers.
 * 4. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef _NEWS68K_INTR_H_
#define	_NEWS68K_INTR_H_

#include <machine/psl.h>
#include <m68k/asm_single.h>

#ifdef _KERNEL
/*
 * news68k can handle software interrupts by its own hardware
 * so has no need to check for any simulated interrupts, etc.
 */
#define	spl0()		_spl0()

#define	spllowersoftclock()	spl2()

#define	IPL_NONE	0
#define	IPL_SOFTCLOCK	(PSL_S|PSL_IPL2)
#define	IPL_SOFTNET	(PSL_S|PSL_IPL2)
#define	IPL_BIO		(PSL_S|PSL_IPL4)
#define	IPL_NET		(PSL_S|PSL_IPL4)
#define	IPL_TTY		(PSL_S|PSL_IPL5)
#define	IPL_VM		(PSL_S|PSL_IPL5)
#define	IPL_SERIAL	(PSL_S|PSL_IPL5)
#define	IPL_CLOCK	(PSL_S|PSL_IPL6)
#define	IPL_STATCLOCK	IPL_CLOCK
#define	IPL_SCHED	(PSL_S|PSL_IPL7)
#define	IPL_HIGH	(PSL_S|PSL_IPL7)
#define	IPL_LOCK	(PSL_S|PSL_IPL7)

typedef int ipl_t;
typedef struct {
	ipl_t _ipl;
} ipl_cookie_t;

static inline ipl_cookie_t
makeiplcookie(ipl_t ipl)
{

	return (ipl_cookie_t){._ipl = ipl};
}

static inline int
splraiseipl(ipl_cookie_t icookie)
{

	return _splraise(icookie._ipl);
}

#include <sys/spl.h>

static __inline void
splx(int sr)
{

	__asm volatile("movw %0,%%sr" : : "di" (sr));
}

/*
 * simulated software interrupt register
 */
extern u_char ssir;
extern volatile u_char *ctrl_int2;

#define	NSIR		(sizeof(ssir) * 8)
#define	SIR_NET		0
#define	SIR_CLOCK	1
#define	NEXT_SIR	2

#define	siron(x)	single_inst_bset_b((ssir), (x))
#define	siroff(x)	single_inst_bclr_b((ssir), (x))
#define	setsoftint(x)	do {				\
				siron(x);		\
				*ctrl_int2 = 0xff;	\
			} while (0)
#define	setsoftnet()	setsoftint(1 << SIR_NET)
#define	setsoftclock()	setsoftint(1 << SIR_CLOCK)

u_char allocate_sir(void (*)(void *), void *);
void init_sir(void);
#endif /* _KERNEL */

#endif /* _NEWS68K_INTR_H_ */