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. 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 #define ICU_IMR_OFFSET 1 45 46 /* 47 * PC-AT machines wire the slave PIC to pin 2 on the master PIC. 48 */ 49 #define ICU_SLAVEID 2 50 51 /* 52 * Determine the base master and slave modes not including auto EOI support. 53 * All machines that FreeBSD supports use 8086 mode. 54 */ 55 #define BASE_MASTER_MODE ICW4_8086 56 #define BASE_SLAVE_MODE ICW4_8086 57 58 /* Enable automatic EOI if requested. */ 59 #ifdef AUTO_EOI_1 60 #define MASTER_MODE (BASE_MASTER_MODE | ICW4_AEOI) 61 #else 62 #define MASTER_MODE BASE_MASTER_MODE 63 #endif 64 #ifdef AUTO_EOI_2 65 #define SLAVE_MODE (BASE_SLAVE_MODE | ICW4_AEOI) 66 #else 67 #define SLAVE_MODE BASE_SLAVE_MODE 68 #endif 69 70 #define IRQ_MASK(irq) (1 << (irq)) 71 #define IMEN_MASK(ai) (IRQ_MASK((ai)->at_irq)) 72 73 void atpic_handle_intr(u_int vector, struct trapframe *frame); 74 void atpic_startup(void); 75 76 #endif /* !_X86_ISA_ICU_H_ */ 77