NetBSD/sys/arch/i386/isa/icu.h

/*	$NetBSD: icu.h,v 1.17 1994/11/04 19:13:49 mycroft Exp $	*/

/*-
 * Copyright (c) 1990 The Regents of the University of California.
 * All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * William Jolitz.
 *
 * 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 University of
 *	California, Berkeley and its contributors.
 * 4. Neither the name of the University 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 REGENTS 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 REGENTS 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.
 *
 *	@(#)icu.h	5.6 (Berkeley) 5/9/91
 */

/*
 * AT/386 Interrupt Control constants
 * W. Jolitz 8/89
 */

#ifndef	_I386_ISA_ICU_H_
#define	_I386_ISA_ICU_H_

#ifndef	LOCORE

/*
 * Interrupt "level" mechanism variables, masks, and macros
 */
extern	unsigned imen;		/* interrupt mask enable */

#define	INTRUNMASK(msk,s)	(msk &= ~(s))
#define	INTREN(s)		(INTRUNMASK(imen, s), SET_ICUS())
#define	INTRMASK(msk,s)		(msk |= (s))
#define	INTRDIS(s)		(INTRMASK(imen, s), SET_ICUS())
#if 0
#define SET_ICUS()	(outb(IO_ICU1 + 1, imen), outb(IU_ICU2 + 1, imen >> 8))
#else
/*
 * XXX - IO_ICU* are defined in isa.h, not icu.h, and nothing much bothers to
 * include isa.h, while too many things include icu.h.
 */
#define SET_ICUS()	(outb(0x21, imen), outb(0xa1, imen >> 8))
#endif

#endif /* !LOCORE */

/*
 * Interrupt enable bits -- in order of priority
 */
#define	IRQ_SLAVE	2

/*
 * Interrupt Control offset into Interrupt descriptor table (IDT)
 */
#define	ICU_OFFSET	32		/* 0-31 are processor exceptions */
#define	ICU_LEN		16		/* 32-47 are ISA interrupts */

#endif /* !_I386_ISA_ICU_H_ */