icu.h revision 92765
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 92765 2002-03-20 07:51:46Z alfred $ 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 * Note: 52 * Most of the SMP equivilants of the icu macros are coded 53 * elsewhere in an MP-safe fashion. 54 * In particular note that the 'imen' variable is opaque. 55 * DO NOT access imen directly, use INTREN()/INTRDIS(). 56 */ 57 58void INTREN (u_int); 59void INTRDIS (u_int); 60 61#ifdef APIC_IO 62extern unsigned apic_imen; /* APIC interrupt mask enable */ 63#else 64extern unsigned imen; /* interrupt mask enable */ 65#endif 66 67#endif /* LOCORE */ 68 69 70#ifdef APIC_IO 71/* 72 * Note: The APIC uses different values for IRQxxx. 73 * Unfortunately many drivers use the 8259 values as indexes 74 * into tables, etc. The APIC equivilants are kept as APIC_IRQxxx. 75 * The 8259 versions have to be used in SMP for legacy operation 76 * of the drivers. 77 */ 78#endif /* APIC_IO */ 79 80/* 81 * Interrupt enable bits - in normal order of priority (which we change) 82 */ 83#define IRQ0 0x0001 /* highest priority - timer */ 84#define IRQ1 0x0002 85#define IRQ_SLAVE 0x0004 86#define IRQ8 0x0100 87#define IRQ9 0x0200 88#define IRQ2 IRQ9 89#define IRQ10 0x0400 90#define IRQ11 0x0800 91#define IRQ12 0x1000 92#define IRQ13 0x2000 93#define IRQ14 0x4000 94#define IRQ15 0x8000 95#define IRQ3 0x0008 /* this is highest after rotation */ 96#define IRQ4 0x0010 97#define IRQ5 0x0020 98#define IRQ6 0x0040 99#define IRQ7 0x0080 /* lowest - parallel printer */ 100 101#ifdef PC98 102#undef IRQ2 103#define IRQ2 0x0004 104#undef IRQ_SLAVE 105#define IRQ_SLAVE 0x0080 106#endif 107 108/* 109 * Interrupt Control offset into Interrupt descriptor table (IDT) 110 */ 111#define ICU_OFFSET 32 /* 0-31 are processor exceptions */ 112 113#ifdef APIC_IO 114 115/* 32-47: ISA IRQ0-IRQ15, 48-63: IO APIC IRQ16-IRQ31 */ 116#define ICU_LEN 32 117#define HWI_MASK 0xffffffff /* bits for h/w interrupts */ 118#define NHWI 32 119 120#else 121 122#define ICU_LEN 16 /* 32-47 are ISA interrupts */ 123#define HWI_MASK 0xffff /* bits for h/w interrupts */ 124#define NHWI 16 125 126#endif /* APIC_IO */ 127 128#define INTRCNT_COUNT (1 + ICU_LEN + 2 * ICU_LEN) 129 130#endif /* !_I386_ISA_ICU_H_ */ 131