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.
48 #include "opt_auto_eoi.h"
50 #include <sys/param.h>
52 #include <machine/lock.h>
54 #include <sys/systm.h>
55 #include <sys/syslog.h>
56 #include <sys/malloc.h>
57 #include <sys/errno.h>
58 #include <sys/interrupt.h>
59 #include <machine/ipl.h>
60 #include <machine/md_var.h>
61 #include <machine/segments.h>
63 #include <machine/globaldata.h>
65 #include <sys/thread2.h>
66 #include <sys/machintr.h>
68 #include <machine/smp.h>
69 #include <bus/isa/isa.h>
70 #include <machine_base/icu/icu.h>
73 #include <bus/isa/isavar.h>
75 #include <machine_base/isa/intr_machdep.h>
76 #include <sys/interrupt.h>
77 #include <machine/clock.h>
78 #include <machine/cpu.h>
80 static void icu_init(void);
82 #define NMI_PARITY (1 << 7)
83 #define NMI_IOCHAN (1 << 6)
84 #define ENMI_WATCHDOG (1 << 7)
85 #define ENMI_BUSTIMER (1 << 6)
86 #define ENMI_IOSTATUS (1 << 5)
89 * Handle a NMI, possibly a machine check.
90 * return true to panic system, false to ignore.
96 int isa_port = inb(0x61);
97 int eisa_port = inb(0x461);
99 log(LOG_CRIT, "NMI ISA %x, EISA %x\n", isa_port, eisa_port);
101 if (isa_port & NMI_PARITY) {
102 log(LOG_CRIT, "RAM parity error, likely hardware failure.");
106 if (isa_port & NMI_IOCHAN) {
107 log(LOG_CRIT, "I/O channel check, likely hardware failure.");
112 * On a real EISA machine, this will never happen. However it can
113 * happen on ISA machines which implement XT style floating point
114 * error handling (very rare). Save them from a meaningless panic.
116 if (eisa_port == 0xff)
119 if (eisa_port & ENMI_WATCHDOG) {
120 log(LOG_CRIT, "EISA watchdog timer expired, likely hardware failure.");
124 if (eisa_port & ENMI_BUSTIMER) {
125 log(LOG_CRIT, "EISA bus timeout, likely hardware failure.");
129 if (eisa_port & ENMI_IOSTATUS) {
130 log(LOG_CRIT, "EISA I/O port status error.");
137 * ICU reinitialize when ICU configuration has lost.
145 for (i = 0; i < MAX_HARDINTS; ++i) {
146 if (count_registered_ints(i))
152 * Fill in default interrupt table (in case of spurious interrupt
153 * during configuration of kernel, setup interrupt control unit
160 KKASSERT(MachIntrABI.type == MACHINTR_ICU);
165 /* Leave interrupts masked */
166 outb(IO_ICU1 + ICU_IMR_OFFSET, 0xff);
167 outb(IO_ICU2 + ICU_IMR_OFFSET, 0xff);
169 MachIntrABI.setdefault();
179 int auto_eoi = 2; /* auto EOI, 8086 mode */
181 int auto_eoi = 0; /* 8086 mode */
186 auto_eoi = 2; /* auto EOI, 8086 mode */
192 outb(IO_ICU1, 0x11); /* reset; program device, four bytes */
193 outb(IO_ICU1 + ICU_IMR_OFFSET, IDT_OFFSET);
194 /* starting at this vector index */
195 outb(IO_ICU1 + ICU_IMR_OFFSET, 1 << ICU_IRQ_SLAVE);
196 /* slave on line 2 */
197 outb(IO_ICU1 + ICU_IMR_OFFSET, auto_eoi | 1); /* 8086 mode */
199 outb(IO_ICU1 + ICU_IMR_OFFSET, 0xff); /* leave interrupts masked */
200 outb(IO_ICU1, 0x0a); /* default to IRR on read */
201 outb(IO_ICU1, 0xc0 | (3 - 1)); /* pri order 3-7, 0-2 (com2 first) */
206 outb(IO_ICU2, 0x11); /* reset; program device, four bytes */
207 outb(IO_ICU2 + ICU_IMR_OFFSET, IDT_OFFSET + 8);
208 /* staring at this vector index */
209 outb(IO_ICU2 + ICU_IMR_OFFSET, ICU_IRQ_SLAVE);
211 outb(IO_ICU2 + ICU_IMR_OFFSET, 2 | 1); /* auto EOI, 8086 mode */
213 outb(IO_ICU2 + ICU_IMR_OFFSET, 1); /* 8086 mode */
216 outb(IO_ICU2 + ICU_IMR_OFFSET, 0xff); /* leave interrupts masked */
217 outb(IO_ICU2, 0x0a); /* default to IRR on read */
222 * Return a bitmap of the current interrupt requests. This is 8259-specific
223 * and is only suitable for use at probe time.
226 isa_irq_pending(void)
233 return ((irr2 << 8) | irr1);