icu.h revision 21673
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 * 36 * from: @(#)icu.h 5.6 (Berkeley) 5/9/91 37 * $FreeBSD: head/sys/i386/isa/icu.h 21673 1997-01-14 07:20:47Z jkh $ 38 */ 39 40/* 41 * AT/386 Interrupt Control constants 42 * W. Jolitz 8/89 43 */ 44 45#ifndef _I386_ISA_ICU_H_ 46#define _I386_ISA_ICU_H_ 47 48#ifndef LOCORE 49 50/* 51 * Interrupt "level" mechanism variables, masks, and macros 52 */ 53extern unsigned imen; /* interrupt mask enable */ 54 55#define INTREN(s) (imen &= ~(s), SET_ICUS()) 56#define INTRDIS(s) (imen |= (s), SET_ICUS()) 57#define INTRMASK(msk,s) (msk |= (s)) 58#define INTRUNMASK(msk,s) (msk &= ~(s)) 59#if 0 60#ifdef PC98 61#define SET_ICUS() (outb(IO_ICU1 + 2, imen), outb(IU_ICU2 + 2, imen >> 8)) 62#else /* IBM-PC */ 63#define SET_ICUS() (outb(IO_ICU1 + 1, imen), outb(IU_ICU2 + 1, imen >> 8)) 64#endif /* PC98 */ 65#else 66/* 67 * XXX - IO_ICU* are defined in isa.h, not icu.h, and nothing much bothers to 68 * include isa.h, while too many things include icu.h. 69 */ 70#ifdef PC98 71#define SET_ICUS() (outb(0x02, imen), outb(0x0a, imen >> 8)) 72#else 73#define SET_ICUS() (outb(0x21, imen), outb(0xa1, imen >> 8)) 74#endif 75#endif 76 77#endif /* LOCORE */ 78 79/* 80 * Interrupt enable bits - in normal order of priority (which we change) 81 */ 82#define IRQ0 0x0001 /* highest priority - timer */ 83#define IRQ1 0x0002 84#define IRQ_SLAVE 0x0004 85#define IRQ8 0x0100 86#define IRQ9 0x0200 87#define IRQ2 IRQ9 88#define IRQ10 0x0400 89#define IRQ11 0x0800 90#define IRQ12 0x1000 91#define IRQ13 0x2000 92#define IRQ14 0x4000 93#define IRQ15 0x8000 94#define IRQ3 0x0008 /* this is highest after rotation */ 95#define IRQ4 0x0010 96#define IRQ5 0x0020 97#define IRQ6 0x0040 98#define IRQ7 0x0080 /* lowest - parallel printer */ 99 100#ifdef PC98 101#undef IRQ2 102#define IRQ2 0x0004 103#undef IRQ_SLAVE 104#define IRQ_SLAVE 0x0080 105#endif 106 107/* 108 * Interrupt Control offset into Interrupt descriptor table (IDT) 109 */ 110#define ICU_OFFSET 32 /* 0-31 are processor exceptions */ 111#define ICU_LEN 16 /* 32-47 are ISA interrupts */ 112 113#endif /* !_I386_ISA_ICU_H_ */ 114