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 * 4. Neither the name of the University nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 * 32 * from: @(#)icu.h 5.6 (Berkeley) 5/9/91 33 * $FreeBSD$ 34 */ 35 36 /* 37 * AT/386 Interrupt Control constants 38 * W. Jolitz 8/89 39 */ 40 41 #ifndef _X86_ISA_ICU_H_ 42 #define _X86_ISA_ICU_H_ 43 44 #ifdef PC98 45 #define ICU_IMR_OFFSET 2 46 #else 47 #define ICU_IMR_OFFSET 1 48 #endif 49 50 /* 51 * PC-98 machines wire the slave 8259A to pin 7 on the master PIC, and 52 * PC-AT machines wire the slave PIC to pin 2 on the master PIC. 53 */ 54 #ifdef PC98 55 #define ICU_SLAVEID 7 56 #else 57 #define ICU_SLAVEID 2 58 #endif 59 60 /* 61 * Determine the base master and slave modes not including auto EOI support. 62 * All machines that FreeBSD supports use 8086 mode. 63 */ 64 #ifdef PC98 65 /* 66 * PC-98 machines do not support auto EOI on the second PIC. Also, it 67 * seems that PC-98 machine PICs use buffered mode, and the master PIC 68 * uses special fully nested mode. 69 */ 70 #define BASE_MASTER_MODE (ICW4_SFNM | ICW4_BUF | ICW4_MS | ICW4_8086) 71 #define BASE_SLAVE_MODE (ICW4_BUF | ICW4_8086) 72 #else 73 #define BASE_MASTER_MODE ICW4_8086 74 #define BASE_SLAVE_MODE ICW4_8086 75 #endif 76 77 /* Enable automatic EOI if requested. */ 78 #ifdef AUTO_EOI_1 79 #define MASTER_MODE (BASE_MASTER_MODE | ICW4_AEOI) 80 #else 81 #define MASTER_MODE BASE_MASTER_MODE 82 #endif 83 #ifdef AUTO_EOI_2 84 #define SLAVE_MODE (BASE_SLAVE_MODE | ICW4_AEOI) 85 #else 86 #define SLAVE_MODE BASE_SLAVE_MODE 87 #endif 88 89 #define IRQ_MASK(irq) (1 << (irq)) 90 #define IMEN_MASK(ai) (IRQ_MASK((ai)->at_irq)) 91 92 void atpic_handle_intr(u_int vector, struct trapframe *frame); 93 void atpic_startup(void); 94 95 #endif /* !_X86_ISA_ICU_H_ */ 96