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.
49 #include <sys/param.h>
50 #include <sys/systm.h>
51 #include <sys/syslog.h>
53 #include <bus/isa/isavar.h>
55 #include <machine_base/icu/icu_var.h>
56 #include <machine_base/isa/isa_intr.h>
58 #define NMI_PARITY (1 << 7)
59 #define NMI_IOCHAN (1 << 6)
60 #define ENMI_WATCHDOG (1 << 7)
61 #define ENMI_BUSTIMER (1 << 6)
62 #define ENMI_IOSTATUS (1 << 5)
65 * Handle a NMI, possibly a machine check.
66 * return true to panic system, false to ignore.
72 int isa_port = inb(0x61);
73 int eisa_port = inb(0x461);
75 log(LOG_CRIT, "NMI ISA %x, EISA %x\n", isa_port, eisa_port);
77 if (isa_port & NMI_PARITY) {
78 log(LOG_CRIT, "RAM parity error, likely hardware failure.");
82 if (isa_port & NMI_IOCHAN) {
83 log(LOG_CRIT, "I/O channel check, likely hardware failure.");
88 * On a real EISA machine, this will never happen. However it can
89 * happen on ISA machines which implement XT style floating point
90 * error handling (very rare). Save them from a meaningless panic.
92 if (eisa_port == 0xff)
95 if (eisa_port & ENMI_WATCHDOG) {
96 log(LOG_CRIT, "EISA watchdog timer expired, likely hardware failure.");
100 if (eisa_port & ENMI_BUSTIMER) {
101 log(LOG_CRIT, "EISA bus timeout, likely hardware failure.");
105 if (eisa_port & ENMI_IOSTATUS) {
106 log(LOG_CRIT, "EISA I/O port status error.");
113 * Fill in default interrupt table (in case of spurious interrupt
114 * during configuration of kernel, setup interrupt control unit
125 isa_irq_pending(void)
127 return icu_irq_pending();