what the heck one last one before i go take a nap...
[dragonfly.git] / sys / i386 / isa / icu.h
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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: src/sys/i386/isa/icu.h,v 1.18 1999/12/26 12:43:47 bde Exp $
3ae0cd58 38 * $DragonFly: src/sys/i386/isa/Attic/icu.h,v 1.4 2003/08/26 21:42:19 rob Exp $
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39 */
40
41/*
42 * AT/386 Interrupt Control constants
43 * W. Jolitz 8/89
44 */
45
46#ifndef _I386_ISA_ICU_H_
47#define _I386_ISA_ICU_H_
48
49#ifndef LOCORE
50
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51void INTREN (u_int);
52void INTRDIS (u_int);
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54#endif /* LOCORE */
55
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56#ifdef APIC_IO
57/*
58 * Note: The APIC uses different values for IRQxxx.
59 * Unfortunately many drivers use the 8259 values as indexes
60 * into tables, etc. The APIC equivilants are kept as APIC_IRQxxx.
61 * The 8259 versions have to be used in SMP for legacy operation
62 * of the drivers.
63 */
64#endif /* APIC_IO */
65
66/*
67 * Interrupt enable bits - in normal order of priority (which we change)
68 */
69#define IRQ0 0x0001 /* highest priority - timer */
70#define IRQ1 0x0002
71#define IRQ_SLAVE 0x0004
72#define IRQ8 0x0100
73#define IRQ9 0x0200
74#define IRQ2 IRQ9
75#define IRQ10 0x0400
76#define IRQ11 0x0800
77#define IRQ12 0x1000
78#define IRQ13 0x2000
79#define IRQ14 0x4000
80#define IRQ15 0x8000
81#define IRQ3 0x0008 /* this is highest after rotation */
82#define IRQ4 0x0010
83#define IRQ5 0x0020
84#define IRQ6 0x0040
85#define IRQ7 0x0080 /* lowest - parallel printer */
86
87#ifdef PC98
88#undef IRQ2
89#define IRQ2 0x0004
90#undef IRQ_SLAVE
91#define IRQ_SLAVE 0x0080
92#endif
93
94
95/*
96 * Interrupt Control offset into Interrupt descriptor table (IDT)
97 */
98#define ICU_OFFSET 32 /* 0-31 are processor exceptions */
99
100#ifdef APIC_IO
101
102/* 32-47: ISA IRQ0-IRQ15, 48-55: IO APIC IRQ16-IRQ23 */
103#define ICU_LEN 24
104
105#else
106
107#define ICU_LEN 16 /* 32-47 are ISA interrupts */
108
109#endif /* APIC_IO */
110
111#endif /* !_I386_ISA_ICU_H_ */