75 lines
2.5 KiB
C
75 lines
2.5 KiB
C
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/*-
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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 <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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#include <pc98/pc98/epsonio.h>
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#include <pc98/pc98/pc98_machdep.h>
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#define NMI_PARITY 0x04
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#define NMI_EPARITY 0x02
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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 port = inb(0x33);
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log(LOG_CRIT, "NMI PC98 port = %x\n", port);
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if (epson_machine_id == 0x20)
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epson_outb(0xc16, epson_inb(0xc16) | 0x1);
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if (port & NMI_PARITY) {
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log(LOG_CRIT, "BASE RAM parity error, likely hardware failure.");
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retval = 1;
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} else if (port & NMI_EPARITY) {
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log(LOG_CRIT, "EXTENDED RAM parity error, likely hardware failure.");
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retval = 1;
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} else {
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log(LOG_CRIT, "\nNMI Resume ??\n");
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}
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return(retval);
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}
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