[unix-history] / sys / i386 / isa / icu.h

/*-
 * 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.
 *
 *	from: @(#)icu.h	5.6 (Berkeley) 5/9/91
 *	$Id$
 */

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

#ifndef	__ICU__
#define	__ICU__

#ifndef	LOCORE

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

extern	unsigned highmask;	/* group of interrupts masked with splhigh() */
extern	unsigned ttymask;	/* group of interrupts masked with spltty() */
extern	unsigned biomask;	/* group of interrupts masked with splbio() */
extern	unsigned netmask;	/* group of interrupts masked with splimp() */

#define	INTREN(s)	(imen &= ~(s), SET_ICUS())
#define	INTRDIS(s)	(imen |= (s), SET_ICUS())
#define	INTRMASK(msk,s)	(msk |= (s))
#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

/*
 * Interrupt enable bits -- in order of priority
 */
#define	IRQ0		0x0001		/* highest priority - timer */
#define	IRQ1		0x0002
#define	IRQ_SLAVE	0x0004
#define	IRQ8		0x0100
#define	IRQ9		0x0200
#define	IRQ2		IRQ9
#define	IRQ10		0x0400
#define	IRQ11		0x0800
#define	IRQ12		0x1000
#define	IRQ13		0x2000
#define	IRQ14		0x4000
#define	IRQ15		0x8000
#define	IRQ3		0x0008
#define	IRQ4		0x0010
#define	IRQ5		0x0020
#define	IRQ6		0x0040
#define	IRQ7		0x0080		/* lowest - parallel printer */

/*
 * 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	__ICU__
Commit	Line	Data
15637ed4 RG	1	/*-
	2	* Copyright (c) 1990 The Regents of the University of California.
	3	* All rights reserved.
	4	*
	5	* This code is derived from software contributed to Berkeley by
	6	* William Jolitz.
	7	*
	8	* Redistribution and use in source and binary forms, with or without
	9	* modification, are permitted provided that the following conditions
	10	* are met:
	11	* 1. Redistributions of source code must retain the above copyright
	12	* notice, this list of conditions and the following disclaimer.
	13	* 2. Redistributions in binary form must reproduce the above copyright
	14	* notice, this list of conditions and the following disclaimer in the
	15	* documentation and/or other materials provided with the distribution.
	16	* 3. All advertising materials mentioning features or use of this software
	17	* must display the following acknowledgement:
	18	* This product includes software developed by the University of
	19	* California, Berkeley and its contributors.
	20	* 4. Neither the name of the University nor the names of its contributors
	21	* may be used to endorse or promote products derived from this software
	22	* without specific prior written permission.
	23	*
	24	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	25	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	26	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	27	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	28	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	29	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	30	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	31	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	32	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	33	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	34	* SUCH DAMAGE.
	35	*
d7136515 RG	36	* from: @(#)icu.h 5.6 (Berkeley) 5/9/91
d7136515 RG	37	* $Id$
15637ed4 RG	38	*/
	39
	40	/*
	41	* AT/386 Interrupt Control constants
	42	* W. Jolitz 8/89
	43	*/
	44
	45	#ifndef __ICU__
	46	#define __ICU__
	47
	48	#ifndef LOCORE
	49
	50	/*
	51	* Interrupt "level" mechanism variables, masks, and macros
	52	*/
	53	extern unsigned imen; /* interrupt mask enable */
	54	extern unsigned cpl; /* current priority level mask */
	55
	56	extern unsigned highmask; /* group of interrupts masked with splhigh() */
	57	extern unsigned ttymask; /* group of interrupts masked with spltty() */
	58	extern unsigned biomask; /* group of interrupts masked with splbio() */
	59	extern unsigned netmask; /* group of interrupts masked with splimp() */
	60
	61	#define INTREN(s) (imen &= ~(s), SET_ICUS())
	62	#define INTRDIS(s) (imen \|= (s), SET_ICUS())
	63	#define INTRMASK(msk,s) (msk \|= (s))
	64	#if 0
	65	#define SET_ICUS() (outb(IO_ICU1 + 1, imen), outb(IU_ICU2 + 1, imen >> 8))
	66	#else
	67	/*
	68	* XXX - IO_ICU* are defined in isa.h, not icu.h, and nothing much bothers to
	69	* include isa.h, while too many things include icu.h.
	70	*/
	71	#define SET_ICUS() (outb(0x21, imen), outb(0xa1, imen >> 8))
	72	#endif
	73
	74	#endif
	75
	76	/*
	77	* Interrupt enable bits -- in order of priority
	78	*/
	79	#define IRQ0 0x0001 /* highest priority - timer */
	80	#define IRQ1 0x0002
	81	#define IRQ_SLAVE 0x0004
	82	#define IRQ8 0x0100
	83	#define IRQ9 0x0200
	84	#define IRQ2 IRQ9
	85	#define IRQ10 0x0400
	86	#define IRQ11 0x0800
	87	#define IRQ12 0x1000
	88	#define IRQ13 0x2000
	89	#define IRQ14 0x4000
	90	#define IRQ15 0x8000
	91	#define IRQ3 0x0008
	92	#define IRQ4 0x0010
	93	#define IRQ5 0x0020
	94	#define IRQ6 0x0040
	95	#define IRQ7 0x0080 /* lowest - parallel printer */
	96
	97	/*
	98	* Interrupt Control offset into Interrupt descriptor table (IDT)
	99	*/
	100	#define ICU_OFFSET 32 /* 0-31 are processor exceptions */
	101	#define ICU_LEN 16 /* 32-47 are ISA interrupts */
102
103	#endif __ICU__