1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1990 The Regents of the University of California. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * William Jolitz. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 35 /* 36 * AT/386 Interrupt Control constants 37 * W. Jolitz 8/89 38 */ 39 40 #ifndef _X86_ISA_ICU_H_ 41 #define _X86_ISA_ICU_H_ 42 43 #define ICU_IMR_OFFSET 1 44 45 /* 46 * PC-AT machines wire the slave PIC to pin 2 on the master PIC. 47 */ 48 #define ICU_SLAVEID 2 49 50 /* 51 * Determine the base master and slave modes not including auto EOI support. 52 * All machines that FreeBSD supports use 8086 mode. 53 */ 54 #define BASE_MASTER_MODE ICW4_8086 55 #define BASE_SLAVE_MODE ICW4_8086 56 57 /* Enable automatic EOI if requested. */ 58 #ifdef AUTO_EOI_1 59 #define MASTER_MODE (BASE_MASTER_MODE | ICW4_AEOI) 60 #else 61 #define MASTER_MODE BASE_MASTER_MODE 62 #endif 63 #ifdef AUTO_EOI_2 64 #define SLAVE_MODE (BASE_SLAVE_MODE | ICW4_AEOI) 65 #else 66 #define SLAVE_MODE BASE_SLAVE_MODE 67 #endif 68 69 #define IRQ_MASK(irq) (1 << (irq)) 70 71 void atpic_handle_intr(u_int vector, struct trapframe *frame); 72 void atpic_startup(void); 73 74 #endif /* !_X86_ISA_ICU_H_ */ 75