FreeBSD/Linux Kernel Cross Reference
sys/x86/isa/icu.h
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 * from: @(#)icu.h 5.6 (Berkeley) 5/9/91
35 * $FreeBSD$
36 */
37
38 /*
39 * AT/386 Interrupt Control constants
40 * W. Jolitz 8/89
41 */
42
43 #ifndef _X86_ISA_ICU_H_
44 #define _X86_ISA_ICU_H_
45
46 #define ICU_IMR_OFFSET 1
47
48 /*
49 * PC-AT machines wire the slave PIC to pin 2 on the master PIC.
50 */
51 #define ICU_SLAVEID 2
52
53 /*
54 * Determine the base master and slave modes not including auto EOI support.
55 * All machines that FreeBSD supports use 8086 mode.
56 */
57 #define BASE_MASTER_MODE ICW4_8086
58 #define BASE_SLAVE_MODE ICW4_8086
59
60 /* Enable automatic EOI if requested. */
61 #ifdef AUTO_EOI_1
62 #define MASTER_MODE (BASE_MASTER_MODE | ICW4_AEOI)
63 #else
64 #define MASTER_MODE BASE_MASTER_MODE
65 #endif
66 #ifdef AUTO_EOI_2
67 #define SLAVE_MODE (BASE_SLAVE_MODE | ICW4_AEOI)
68 #else
69 #define SLAVE_MODE BASE_SLAVE_MODE
70 #endif
71
72 #define IRQ_MASK(irq) (1 << (irq))
73
74 void atpic_handle_intr(u_int vector, struct trapframe *frame);
75 void atpic_startup(void);
76
77 #endif /* !_X86_ISA_ICU_H_ */
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