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 * $FreeBSD$
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 #ifdef APIC_IO
51
52 /*
53 #define MP_SAFE
54 * Note:
55 * Most of the SMP equivilants of the icu macros are coded
56 * elsewhere in an MP-safe fashion.
57 * In particular note that the 'imen' variable is opaque.
58 * DO NOT access imen directly, use INTREN()/INTRDIS().
59 */
60
61 void INTREN __P((u_int));
62 void INTRDIS __P((u_int));
63 #define INTRMASK(msk,s) (msk |= (s))
64 #define INTRUNMASK(msk,s) (msk &= ~(s))
65
66 #else /* APIC_IO */
67
68 /*
69 * Interrupt "level" mechanism variables, masks, and macros
70 */
71 extern unsigned imen; /* interrupt mask enable */
72
73 #define INTREN(s) (imen &= ~(s), SET_ICUS())
74 #define INTRDIS(s) (imen |= (s), SET_ICUS())
75 #define INTRMASK(msk,s) (msk |= (s))
76 #define INTRUNMASK(msk,s) (msk &= ~(s))
77
78 #if 0
79 #ifdef PC98
80 #define SET_ICUS() (outb(IO_ICU1 + 2, imen), outb(IU_ICU2 + 2, imen >> 8))
81 #define INTRGET() ((inb(IO_ICU2) << 8 | inb(IO_ICU1)) & 0xffff)
82 #else /* IBM-PC */
83 #define SET_ICUS() (outb(IO_ICU1 + 1, imen), outb(IU_ICU2 + 1, imen >> 8))
84 #define INTRGET() ((inb(IO_ICU2) << 8 | inb(IO_ICU1)) & 0xffff)
85 #endif /* PC98 */
86 #else
87 /*
88 * XXX - IO_ICU* are defined in isa.h, not icu.h, and nothing much bothers to
89 * include isa.h, while too many things include icu.h.
90 */
91 #ifdef PC98
92 #define SET_ICUS() (outb(0x02, imen), outb(0x0a, imen >> 8))
93 /* XXX is this correct? */
94 #define INTRGET() ((inb(0x0a) << 8 | inb(0x02)) & 0xffff)
95 #else
96 #define SET_ICUS() (outb(0x21, imen), outb(0xa1, imen >> 8))
97 #define INTRGET() ((inb(0xa1) << 8 | inb(0x21)) & 0xffff)
98 #endif
99 #endif
100
101 #endif /* APIC_IO */
102
103 #endif /* LOCORE */
104
105
106 #ifdef APIC_IO
107 /*
108 * Note: The APIC uses different values for IRQxxx.
109 * Unfortunately many drivers use the 8259 values as indexes
110 * into tables, etc. The APIC equivilants are kept as APIC_IRQxxx.
111 * The 8259 versions have to be used in SMP for legacy operation
112 * of the drivers.
113 */
114 #endif /* APIC_IO */
115
116 /*
117 * Interrupt enable bits - in normal order of priority (which we change)
118 */
119 #define IRQ0 0x0001 /* highest priority - timer */
120 #define IRQ1 0x0002
121 #define IRQ_SLAVE 0x0004
122 #define IRQ8 0x0100
123 #define IRQ9 0x0200
124 #define IRQ2 IRQ9
125 #define IRQ10 0x0400
126 #define IRQ11 0x0800
127 #define IRQ12 0x1000
128 #define IRQ13 0x2000
129 #define IRQ14 0x4000
130 #define IRQ15 0x8000
131 #define IRQ3 0x0008 /* this is highest after rotation */
132 #define IRQ4 0x0010
133 #define IRQ5 0x0020
134 #define IRQ6 0x0040
135 #define IRQ7 0x0080 /* lowest - parallel printer */
136
137 #ifdef PC98
138 #undef IRQ2
139 #define IRQ2 0x0004
140 #undef IRQ_SLAVE
141 #define IRQ_SLAVE 0x0080
142 #endif
143
144
145 /*
146 * Interrupt Control offset into Interrupt descriptor table (IDT)
147 */
148 #define ICU_OFFSET 32 /* 0-31 are processor exceptions */
149
150 #ifdef APIC_IO
151
152 /* 32-47: ISA IRQ0-IRQ15, 48-55: IO APIC IRQ16-IRQ23 */
153 #define ICU_LEN 24
154
155 #else
156
157 #define ICU_LEN 16 /* 32-47 are ISA interrupts */
158
159 #endif /* APIC_IO */
160
161 #endif /* !_I386_ISA_ICU_H_ */
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