100 lines
3.1 KiB
C
100 lines
3.1 KiB
C
/*-
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* Copyright (c) 1991 The Regents of the University of California.
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* All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* William Jolitz.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* from: @(#)isa.c 7.2 (Berkeley) 5/13/91
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include "opt_mca.h"
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#include <sys/types.h>
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#include <sys/syslog.h>
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#include <sys/systm.h>
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#include <machine/md_var.h>
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#define NMI_PARITY (1 << 7)
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#define NMI_IOCHAN (1 << 6)
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#define ENMI_WATCHDOG (1 << 7)
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#define ENMI_BUSTIMER (1 << 6)
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#define ENMI_IOSTATUS (1 << 5)
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/*
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* Handle a NMI, possibly a machine check.
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* return true to panic system, false to ignore.
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*/
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int
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isa_nmi(int cd)
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{
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int retval = 0;
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int isa_port = inb(0x61);
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int eisa_port = inb(0x461);
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log(LOG_CRIT, "NMI ISA %x, EISA %x\n", isa_port, eisa_port);
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if (isa_port & NMI_PARITY) {
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log(LOG_CRIT, "RAM parity error, likely hardware failure.");
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retval = 1;
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}
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if (isa_port & NMI_IOCHAN) {
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log(LOG_CRIT, "I/O channel check, likely hardware failure.");
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retval = 1;
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}
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/*
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* On a real EISA machine, this will never happen. However it can
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* happen on ISA machines which implement XT style floating point
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* error handling (very rare). Save them from a meaningless panic.
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*/
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if (eisa_port == 0xff)
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return(retval);
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if (eisa_port & ENMI_WATCHDOG) {
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log(LOG_CRIT, "EISA watchdog timer expired, likely hardware failure.");
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retval = 1;
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}
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if (eisa_port & ENMI_BUSTIMER) {
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log(LOG_CRIT, "EISA bus timeout, likely hardware failure.");
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retval = 1;
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}
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if (eisa_port & ENMI_IOSTATUS) {
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log(LOG_CRIT, "EISA I/O port status error.");
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retval = 1;
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}
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return(retval);
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}
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