2 * Copyright (c) 1991 The Regents of the University of California.
3 * Copyright (c) 2008 The DragonFly Project.
6 * This code is derived from software contributed to Berkeley by
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. All advertising materials mentioning features or use of this software
18 * must display the following acknowledgement:
19 * This product includes software developed by the University of
20 * California, Berkeley and its contributors.
21 * 4. Neither the name of the University nor the names of its contributors
22 * may be used to endorse or promote products derived from this software
23 * without specific prior written permission.
25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
28 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
37 * from: @(#)isa.c 7.2 (Berkeley) 5/13/91
38 * $FreeBSD: src/sys/i386/isa/intr_machdep.c,v 1.29.2.5 2001/10/14 06:54:27 luigi Exp $
39 * $DragonFly: src/sys/platform/pc64/isa/intr_machdep.c,v 1.1 2008/08/29 17:07:19 dillon Exp $
42 * This file contains an aggregated module marked:
43 * Copyright (c) 1997, Stefan Esser <se@freebsd.org>
44 * All rights reserved.
45 * See the notice for details.
50 #include <sys/param.h>
51 #include <sys/systm.h>
52 #include <sys/syslog.h>
54 #include <bus/isa/isavar.h>
56 #include <machine_base/icu/icu_var.h>
57 #include <machine_base/isa/intr_machdep.h>
59 #define NMI_PARITY (1 << 7)
60 #define NMI_IOCHAN (1 << 6)
61 #define ENMI_WATCHDOG (1 << 7)
62 #define ENMI_BUSTIMER (1 << 6)
63 #define ENMI_IOSTATUS (1 << 5)
66 * Handle a NMI, possibly a machine check.
67 * return true to panic system, false to ignore.
73 int isa_port = inb(0x61);
74 int eisa_port = inb(0x461);
76 log(LOG_CRIT, "NMI ISA %x, EISA %x\n", isa_port, eisa_port);
78 if (isa_port & NMI_PARITY) {
79 log(LOG_CRIT, "RAM parity error, likely hardware failure.");
83 if (isa_port & NMI_IOCHAN) {
84 log(LOG_CRIT, "I/O channel check, likely hardware failure.");
89 * On a real EISA machine, this will never happen. However it can
90 * happen on ISA machines which implement XT style floating point
91 * error handling (very rare). Save them from a meaningless panic.
93 if (eisa_port == 0xff)
96 if (eisa_port & ENMI_WATCHDOG) {
97 log(LOG_CRIT, "EISA watchdog timer expired, likely hardware failure.");
101 if (eisa_port & ENMI_BUSTIMER) {
102 log(LOG_CRIT, "EISA bus timeout, likely hardware failure.");
106 if (eisa_port & ENMI_IOSTATUS) {
107 log(LOG_CRIT, "EISA I/O port status error.");
114 * Fill in default interrupt table (in case of spurious interrupt
115 * during configuration of kernel, setup interrupt control unit
126 isa_irq_pending(void)
128 return icu_irq_pending();