FreeBSD/Linux Kernel Cross Reference
sys/i386/isa/icu.h
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 1.8.2.1 1999/09/05 08:12:39 peter Exp $
38 */
39
40 /*
41 * AT/386 Interrupt Control constants
42 * W. Jolitz 8/89
43 */
44
45 #ifndef _I386_ISA_ICU_H_
46 #define _I386_ISA_ICU_H_
47
48 #ifndef LOCORE
49
50 /*
51 * Interrupt "level" mechanism variables, masks, and macros
52 */
53 extern unsigned imen; /* interrupt mask enable */
54
55 #define INTREN(s) (imen &= ~(s), SET_ICUS())
56 #define INTRDIS(s) (imen |= (s), SET_ICUS())
57 #define INTRMASK(msk,s) (msk |= (s))
58 #define INTRUNMASK(msk,s) (msk &= ~(s))
59 #if 0
60 #ifdef PC98
61 #define SET_ICUS() (outb(IO_ICU1 + 2, imen), outb(IU_ICU2 + 2, imen >> 8))
62 #else /* IBM-PC */
63 #define SET_ICUS() (outb(IO_ICU1 + 1, imen), outb(IU_ICU2 + 1, imen >> 8))
64 #endif /* PC98 */
65 #else
66 /*
67 * XXX - IO_ICU* are defined in isa.h, not icu.h, and nothing much bothers to
68 * include isa.h, while too many things include icu.h.
69 */
70 #ifdef PC98
71 #define SET_ICUS() (outb(0x02, imen), outb(0x0a, imen >> 8))
72 #else
73 #define SET_ICUS() (outb(0x21, imen), outb(0xa1, imen >> 8))
74 #endif
75 #endif
76
77 #endif /* LOCORE */
78
79 /*
80 * Interrupt enable bits - in normal order of priority (which we change)
81 */
82 #define IRQ0 0x0001 /* highest priority - timer */
83 #define IRQ1 0x0002
84 #define IRQ_SLAVE 0x0004
85 #define IRQ8 0x0100
86 #define IRQ9 0x0200
87 #define IRQ2 IRQ9
88 #define IRQ10 0x0400
89 #define IRQ11 0x0800
90 #define IRQ12 0x1000
91 #define IRQ13 0x2000
92 #define IRQ14 0x4000
93 #define IRQ15 0x8000
94 #define IRQ3 0x0008 /* this is highest after rotation */
95 #define IRQ4 0x0010
96 #define IRQ5 0x0020
97 #define IRQ6 0x0040
98 #define IRQ7 0x0080 /* lowest - parallel printer */
99
100 #ifdef PC98
101 #undef IRQ2
102 #define IRQ2 0x0004
103 #undef IRQ_SLAVE
104 #define IRQ_SLAVE 0x0080
105 #endif
106
107 /*
108 * Interrupt Control offset into Interrupt descriptor table (IDT)
109 */
110 #define ICU_OFFSET 32 /* 0-31 are processor exceptions */
111 #define ICU_LEN 16 /* 32-47 are ISA interrupts */
112
113 #endif /* !_I386_ISA_ICU_H_ */
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