2 * Copyright (c) 1991 The Regents of the University of California.
5 * This code is derived from software contributed to Berkeley by
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
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.
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
36 * from: @(#)isa.c 7.2 (Berkeley) 5/13/91
37 * $FreeBSD: src/sys/i386/isa/intr_machdep.c,v 1.29.2.5 2001/10/14 06:54:27 luigi Exp $
38 * $DragonFly: src/sys/platform/pc32/isa/intr_machdep.c,v 1.48 2008/08/02 01:14:43 dillon Exp $
41 * This file contains an aggregated module marked:
42 * Copyright (c) 1997, Stefan Esser <se@freebsd.org>
43 * All rights reserved.
44 * See the notice for details.
47 #include "opt_auto_eoi.h"
49 #include <sys/param.h>
50 #include <sys/systm.h>
51 #include <sys/machintr.h>
52 #include <sys/interrupt.h>
53 #include <bus/isa/isareg.h>
54 #include <cpu/cpufunc.h>
55 #include <machine/smp.h>
56 #include <machine_base/isa/intr_machdep.h>
57 #include <machine_base/icu/icu.h>
58 #include <machine_base/icu/icu_var.h>
60 static void icu_init(void);
66 int auto_eoi = 2; /* auto EOI, 8086 mode */
68 int auto_eoi = 0; /* 8086 mode */
73 auto_eoi = 2; /* auto EOI, 8086 mode */
79 outb(IO_ICU1, 0x11); /* reset; program device, four bytes */
80 outb(IO_ICU1 + ICU_IMR_OFFSET, IDT_OFFSET);
81 /* starting at this vector index */
82 outb(IO_ICU1 + ICU_IMR_OFFSET, 1 << ICU_IRQ_SLAVE);
84 outb(IO_ICU1 + ICU_IMR_OFFSET, auto_eoi | 1); /* 8086 mode */
86 outb(IO_ICU1 + ICU_IMR_OFFSET, 0xff); /* leave interrupts masked */
87 outb(IO_ICU1, 0x0a); /* default to IRR on read */
88 outb(IO_ICU1, 0xc0 | (3 - 1)); /* pri order 3-7, 0-2 (com2 first) */
93 outb(IO_ICU2, 0x11); /* reset; program device, four bytes */
94 outb(IO_ICU2 + ICU_IMR_OFFSET, IDT_OFFSET + 8);
95 /* staring at this vector index */
96 outb(IO_ICU2 + ICU_IMR_OFFSET, ICU_IRQ_SLAVE);
98 outb(IO_ICU2 + ICU_IMR_OFFSET, 2 | 1); /* auto EOI, 8086 mode */
100 outb(IO_ICU2 + ICU_IMR_OFFSET, 1); /* 8086 mode */
103 outb(IO_ICU2 + ICU_IMR_OFFSET, 0xff); /* leave interrupts masked */
104 outb(IO_ICU2, 0x0a); /* default to IRR on read */
112 KKASSERT(MachIntrABI.type == MACHINTR_ICU);
117 /* Leave interrupts masked */
118 outb(IO_ICU1 + ICU_IMR_OFFSET, 0xff);
119 outb(IO_ICU2 + ICU_IMR_OFFSET, 0xff);
121 MachIntrABI.setdefault();
128 * ICU reinitialize when ICU configuration has lost.
136 for (i = 0; i < MAX_HARDINTS; ++i) {
137 if (count_registered_ints(i))
143 * Return a bitmap of the current interrupt requests. This is 8259-specific
144 * and is only suitable for use at probe time.
147 icu_irq_pending(void)
154 return ((irr2 << 8) | irr1);