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. Neither the name of the University nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * from: @(#)isa.c 7.2 (Berkeley) 5/13/91
33 * $FreeBSD: src/sys/i386/isa/intr_machdep.c,v 1.29.2.5 2001/10/14 06:54:27 luigi Exp $
34 * $DragonFly: src/sys/platform/pc32/isa/intr_machdep.c,v 1.48 2008/08/02 01:14:43 dillon Exp $
37 * This file contains an aggregated module marked:
38 * Copyright (c) 1997, Stefan Esser <se@freebsd.org>
39 * All rights reserved.
40 * See the notice for details.
43 #include "opt_auto_eoi.h"
45 #include <sys/param.h>
46 #include <sys/systm.h>
47 #include <sys/machintr.h>
48 #include <sys/interrupt.h>
49 #include <sys/thread2.h>
51 #include <bus/isa/isareg.h>
52 #include <cpu/cpufunc.h>
54 #include <machine/intr_machdep.h>
55 #include <machine_base/icu/icu.h>
56 #include <machine_base/icu/icu_var.h>
57 #include <machine_base/apic/ioapic.h>
59 static void icu_init(void);
65 int auto_eoi = 2; /* auto EOI, 8086 mode */
67 int auto_eoi = 0; /* 8086 mode */
71 auto_eoi = 2; /* auto EOI, 8086 mode */
76 outb(IO_ICU1, 0x11); /* reset; program device, four bytes */
77 outb(IO_ICU1 + ICU_IMR_OFFSET, IDT_OFFSET);
78 /* starting at this vector index */
79 outb(IO_ICU1 + ICU_IMR_OFFSET, 1 << ICU_IRQ_SLAVE);
81 outb(IO_ICU1 + ICU_IMR_OFFSET, auto_eoi | 1); /* 8086 mode */
83 outb(IO_ICU1 + ICU_IMR_OFFSET, 0xff); /* leave interrupts masked */
84 outb(IO_ICU1, 0x0a); /* default to IRR on read */
85 outb(IO_ICU1, 0xc0 | (3 - 1)); /* pri order 3-7, 0-2 (com2 first) */
90 outb(IO_ICU2, 0x11); /* reset; program device, four bytes */
91 outb(IO_ICU2 + ICU_IMR_OFFSET, IDT_OFFSET + 8);
92 /* staring at this vector index */
93 outb(IO_ICU2 + ICU_IMR_OFFSET, ICU_IRQ_SLAVE);
95 outb(IO_ICU2 + ICU_IMR_OFFSET, 2 | 1); /* auto EOI, 8086 mode */
97 outb(IO_ICU2 + ICU_IMR_OFFSET, 1); /* 8086 mode */
100 outb(IO_ICU2 + ICU_IMR_OFFSET, 0xff); /* leave interrupts masked */
101 outb(IO_ICU2, 0x0a); /* default to IRR on read */
109 KKASSERT(MachIntrABI.type == MACHINTR_ICU);
114 /* Leave interrupts masked */
115 outb(IO_ICU1 + ICU_IMR_OFFSET, 0xff);
116 outb(IO_ICU2 + ICU_IMR_OFFSET, 0xff);
118 MachIntrABI.setdefault();
125 * ICU reinitialize when ICU configuration has lost.
134 for (i = 0; i < MAX_HARDINTS; ++i) {
135 if (count_registered_ints(i))
136 machintr_intr_enable(i);
144 * Return a bitmap of the current interrupt requests. This is 8259-specific
145 * and is only suitable for use at probe time.
148 icu_irq_pending(void)
155 return ((irr2 << 8) | irr1);
159 icu_ioapic_extint(int irq, int vec)
164 * Only first 8 interrupt is supported.
165 * Don't allow setup for the slave link.
167 if (irq >= 8 || irq == 2)
173 * Re-initialize master 8259:
174 * reset; prog 4 bytes, single ICU, edge triggered
177 outb(IO_ICU1 + 1, vec); /* start vector (unused) */
178 outb(IO_ICU1 + 1, 0x00); /* ignore slave */
179 outb(IO_ICU1 + 1, 0x03); /* auto EOI, 8086 */
180 outb(IO_ICU1 + 1, mask);
186 icu_reinit_noioapic(void)
190 KKASSERT(MachIntrABI.type == MACHINTR_ICU);
191 KKASSERT(ioapic_enable == 0);
197 /* Leave interrupts masked */
198 outb(IO_ICU1 + ICU_IMR_OFFSET, 0xff);
199 outb(IO_ICU2 + ICU_IMR_OFFSET, 0xff);
202 MachIntrABI.stabilize();
206 MachIntrABI.cleanup();