icu.h revision 71247
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 71247 2001-01-19 10:55:13Z peter $ 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#define MP_SAFE 52 * Note: 53 * Most of the SMP equivilants of the icu macros are coded 54 * elsewhere in an MP-safe fashion. 55 * In particular note that the 'imen' variable is opaque. 56 * DO NOT access imen directly, use INTREN()/INTRDIS(). 57 */ 58 59void INTREN __P((u_int)); 60void INTRDIS __P((u_int)); 61 62#ifdef APIC_IO 63extern unsigned apic_imen; /* APIC interrupt mask enable */ 64#define APIC_IMEN_BITS 32 /* number of bits in apic_imen */ 65#else 66extern unsigned imen; /* interrupt mask enable */ 67#define IMEN_BITS 16 /* number of bits in imen */ 68#endif 69 70#endif /* LOCORE */ 71 72 73#ifdef APIC_IO 74/* 75 * Note: The APIC uses different values for IRQxxx. 76 * Unfortunately many drivers use the 8259 values as indexes 77 * into tables, etc. The APIC equivilants are kept as APIC_IRQxxx. 78 * The 8259 versions have to be used in SMP for legacy operation 79 * of the drivers. 80 */ 81#endif /* APIC_IO */ 82 83/* 84 * Interrupt enable bits - in normal order of priority (which we change) 85 */ 86#define IRQ0 0x0001 /* highest priority - timer */ 87#define IRQ1 0x0002 88#define IRQ_SLAVE 0x0004 89#define IRQ8 0x0100 90#define IRQ9 0x0200 91#define IRQ2 IRQ9 92#define IRQ10 0x0400 93#define IRQ11 0x0800 94#define IRQ12 0x1000 95#define IRQ13 0x2000 96#define IRQ14 0x4000 97#define IRQ15 0x8000 98#define IRQ3 0x0008 /* this is highest after rotation */ 99#define IRQ4 0x0010 100#define IRQ5 0x0020 101#define IRQ6 0x0040 102#define IRQ7 0x0080 /* lowest - parallel printer */ 103 104#ifdef PC98 105#undef IRQ2 106#define IRQ2 0x0004 107#undef IRQ_SLAVE 108#define IRQ_SLAVE 0x0080 109#endif 110 111 112/* 113 * Interrupt Control offset into Interrupt descriptor table (IDT) 114 */ 115#define ICU_OFFSET 32 /* 0-31 are processor exceptions */ 116 117#ifdef APIC_IO 118 119/* 32-47: ISA IRQ0-IRQ15, 48-55: IO APIC IRQ16-IRQ31 */ 120#define ICU_LEN 32 121 122#else 123 124#define ICU_LEN 16 /* 32-47 are ISA interrupts */ 125 126#endif /* APIC_IO */ 127 128#endif /* !_I386_ISA_ICU_H_ */ 129