hp300/include/intr.h

/*	$NetBSD: intr.h,v 1.8 2000/08/21 02:06:32 thorpej Exp $	*/

/*-
 * Copyright (c) 1996, 1997, 1999 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by 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 contributors.
 * 4. Neither the name of The NetBSD Foundation nor the names of its
 *    contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
 * ``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 FOUNDATION OR CONTRIBUTORS
 * 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 _HP300_INTR_H_
#define	_HP300_INTR_H_

#include <machine/psl.h>

#ifdef _HP300_INTR_H_PRIVATE
#include <sys/queue.h>

/*
 * The location and size of the autovectored interrupt portion
 * of the vector table.
 */
#define ISRLOC		0x18
#define NISR		8

struct isr {
	LIST_ENTRY(isr) isr_link;
	int		(*isr_func) __P((void *));
	void		*isr_arg;
	int		isr_ipl;
	int		isr_priority;
};
#endif /* _HP300_INTR_H_PRIVATE */

/*
 * Interrupt "levels".  These are a more abstract representation
 * of interrupt levels, and do not have the same meaning as m68k
 * CPU interrupt levels.  They serve two purposes:
 *
 *	- properly order ISRs in the list for that CPU ipl
 *	- compute CPU PSL values for the spl*() calls.
 */
#define	IPL_NONE	0	/* disable only this interrupt */
#define	IPL_BIO		1	/* disable block I/O interrupts */
#define	IPL_NET		2	/* disable network interrupts */
#define	IPL_TTY		3	/* disable terminal interrupts */
#define	IPL_TTYNOBUF	4	/* IPL_TTY + higher ISR priority */
#define	IPL_CLOCK	5	/* disable clock interrupts */
#define	IPL_HIGH	6	/* disable all interrupts */

/*
 * Convert PSL values to CPU IPLs and vice-versa.
 */
#define	PSLTOIPL(x)	(((x) >> 8) & 0xf)
#define	IPLTOPSL(x)	((((x) & 0xf) << 8) | PSL_S)

#ifdef _KERNEL
/* spl0 requires checking for software interrupts */

/*
 * This array contains the appropriate PSL_S|PSL_IPL? values
 * to raise interrupt priority to the requested level.
 */
extern unsigned short hp300_ipls[];

#define	HP300_IPL_SOFT		0
#define	HP300_IPL_BIO		1
#define	HP300_IPL_NET		2
#define	HP300_IPL_TTY		3
#define	HP300_IPL_IMP		4
#define	HP300_IPL_CLOCK		5
#define	HP300_IPL_HIGH		6
#define	HP300_NIPLS		7

/* These spl calls are _not_ to be used by machine-independent code. */
#define	splhil()	splraise1()
#define	splkbd()	splhil()

/* These spl calls are used by machine-independent code. */
#define	spllowersoftclock() spl1()
#define	splsoft()	splraise1()
#define	splsoftclock()	splsoft()
#define	splsoftnet()	splsoft()
#define	splbio()	_splraise(hp300_ipls[HP300_IPL_BIO])
#define	splnet()	_splraise(hp300_ipls[HP300_IPL_NET])
#define	spltty()	_splraise(hp300_ipls[HP300_IPL_TTY])
#define	splimp()	_splraise(hp300_ipls[HP300_IPL_IMP])
#define	splclock()	spl6()
#define	splstatclock()	splclock()
#define	splhigh()	spl7()
#define	splsched()	spl7()

/* watch out for side effects */
#define	splx(s)		((s) & PSL_IPL ? _spl((s)) : spl0())

/*
 * Simulated software interrupt register.
 */
extern volatile u_int8_t ssir;

#define	SIR_NET		0x01
#define	SIR_CLOCK	0x02

#define	siron(mask)	\
	__asm __volatile ( "orb %1,%0" : "=m" (ssir) : "i" ((mask)))
#define	siroff(mask)	\
	__asm __volatile ( "andb %1,%0" : "=m" (ssir) : "ir" (~(mask)));

#define	setsoftnet()	siron(SIR_NET)
#define	setsoftclock()	siron(SIR_CLOCK)

/* locore.s */
int	spl0 __P((void));

/* intr.c */
void	intr_init __P((void));
void	*intr_establish __P((int (*)(void *), void *, int, int));
void	intr_disestablish __P((void *));
void	intr_dispatch __P((int));
void	intr_printlevels __P((void));
#endif /* _KERNEL */

#endif /* _HP300_INTR_H_ */