icu.h revision 619
14Srgrimes/*- 24Srgrimes * Copyright (c) 1990 The Regents of the University of California. 34Srgrimes * All rights reserved. 44Srgrimes * 54Srgrimes * This code is derived from software contributed to Berkeley by 64Srgrimes * William Jolitz. 74Srgrimes * 84Srgrimes * Redistribution and use in source and binary forms, with or without 94Srgrimes * modification, are permitted provided that the following conditions 104Srgrimes * are met: 114Srgrimes * 1. Redistributions of source code must retain the above copyright 124Srgrimes * notice, this list of conditions and the following disclaimer. 134Srgrimes * 2. Redistributions in binary form must reproduce the above copyright 144Srgrimes * notice, this list of conditions and the following disclaimer in the 154Srgrimes * documentation and/or other materials provided with the distribution. 164Srgrimes * 3. All advertising materials mentioning features or use of this software 174Srgrimes * must display the following acknowledgement: 184Srgrimes * This product includes software developed by the University of 194Srgrimes * California, Berkeley and its contributors. 204Srgrimes * 4. Neither the name of the University nor the names of its contributors 214Srgrimes * may be used to endorse or promote products derived from this software 224Srgrimes * without specific prior written permission. 234Srgrimes * 244Srgrimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 254Srgrimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 264Srgrimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 274Srgrimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 284Srgrimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 294Srgrimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 304Srgrimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 314Srgrimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 324Srgrimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 334Srgrimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 344Srgrimes * SUCH DAMAGE. 354Srgrimes * 36619Srgrimes * from: @(#)icu.h 5.6 (Berkeley) 5/9/91 37619Srgrimes * $Id$ 384Srgrimes */ 394Srgrimes 404Srgrimes/* 414Srgrimes * AT/386 Interrupt Control constants 424Srgrimes * W. Jolitz 8/89 434Srgrimes */ 444Srgrimes 454Srgrimes#ifndef __ICU__ 464Srgrimes#define __ICU__ 474Srgrimes 484Srgrimes#ifndef LOCORE 494Srgrimes 504Srgrimes/* 514Srgrimes * Interrupt "level" mechanism variables, masks, and macros 524Srgrimes */ 534Srgrimesextern unsigned imen; /* interrupt mask enable */ 544Srgrimesextern unsigned cpl; /* current priority level mask */ 554Srgrimes 564Srgrimesextern unsigned highmask; /* group of interrupts masked with splhigh() */ 574Srgrimesextern unsigned ttymask; /* group of interrupts masked with spltty() */ 584Srgrimesextern unsigned biomask; /* group of interrupts masked with splbio() */ 594Srgrimesextern unsigned netmask; /* group of interrupts masked with splimp() */ 604Srgrimes 614Srgrimes#define INTREN(s) (imen &= ~(s), SET_ICUS()) 624Srgrimes#define INTRDIS(s) (imen |= (s), SET_ICUS()) 634Srgrimes#define INTRMASK(msk,s) (msk |= (s)) 644Srgrimes#if 0 654Srgrimes#define SET_ICUS() (outb(IO_ICU1 + 1, imen), outb(IU_ICU2 + 1, imen >> 8)) 664Srgrimes#else 674Srgrimes/* 684Srgrimes * XXX - IO_ICU* are defined in isa.h, not icu.h, and nothing much bothers to 694Srgrimes * include isa.h, while too many things include icu.h. 704Srgrimes */ 714Srgrimes#define SET_ICUS() (outb(0x21, imen), outb(0xa1, imen >> 8)) 724Srgrimes#endif 734Srgrimes 744Srgrimes#endif 754Srgrimes 764Srgrimes/* 774Srgrimes * Interrupt enable bits -- in order of priority 784Srgrimes */ 794Srgrimes#define IRQ0 0x0001 /* highest priority - timer */ 804Srgrimes#define IRQ1 0x0002 814Srgrimes#define IRQ_SLAVE 0x0004 824Srgrimes#define IRQ8 0x0100 834Srgrimes#define IRQ9 0x0200 844Srgrimes#define IRQ2 IRQ9 854Srgrimes#define IRQ10 0x0400 864Srgrimes#define IRQ11 0x0800 874Srgrimes#define IRQ12 0x1000 884Srgrimes#define IRQ13 0x2000 894Srgrimes#define IRQ14 0x4000 904Srgrimes#define IRQ15 0x8000 914Srgrimes#define IRQ3 0x0008 924Srgrimes#define IRQ4 0x0010 934Srgrimes#define IRQ5 0x0020 944Srgrimes#define IRQ6 0x0040 954Srgrimes#define IRQ7 0x0080 /* lowest - parallel printer */ 964Srgrimes 974Srgrimes/* 984Srgrimes * Interrupt Control offset into Interrupt descriptor table (IDT) 994Srgrimes */ 1004Srgrimes#define ICU_OFFSET 32 /* 0-31 are processor exceptions */ 1014Srgrimes#define ICU_LEN 16 /* 32-47 are ISA interrupts */ 1024Srgrimes 1034Srgrimes#endif __ICU__ 104