icu.h revision 619
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 * $Id$ 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 */ 53extern unsigned imen; /* interrupt mask enable */ 54extern unsigned cpl; /* current priority level mask */ 55 56extern unsigned highmask; /* group of interrupts masked with splhigh() */ 57extern unsigned ttymask; /* group of interrupts masked with spltty() */ 58extern unsigned biomask; /* group of interrupts masked with splbio() */ 59extern 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__ 104