/*-
* SPDX-License-Identifier: BSD-3-Clause
*
* Copyright (c) 1991 The Regents of the University of California.
* All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* William Jolitz.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* from: @(#)isa.c 7.2 (Berkeley) 5/13/91
*/
#include <sys/cdefs.h>
#include <sys/types.h>
#include <sys/syslog.h>
#include <sys/systm.h>
#include <machine/md_var.h>
#define NMI_PARITY (1 << 7)
#define NMI_IOCHAN (1 << 6)
#define ENMI_WATCHDOG (1 << 7)
#define ENMI_BUSTIMER (1 << 6)
#define ENMI_IOSTATUS (1 << 5)
/*
* Handle a NMI, possibly a machine check.
* return true to panic system, false to ignore.
*/
int
isa_nmi(int cd)
{
int retval = 0;
int isa_port = inb(0x61);
int eisa_port = inb(0x461);
log(LOG_CRIT, "NMI ISA %x, EISA %x\n", isa_port, eisa_port);
if (isa_port & NMI_PARITY) {
log(LOG_CRIT, "RAM parity error, likely hardware failure.");
retval = 1;
}
if (isa_port & NMI_IOCHAN) {
log(LOG_CRIT, "I/O channel check, likely hardware failure.");
retval = 1;
}
/*
* On a real EISA machine, this will never happen. However it can
* happen on ISA machines which implement XT style floating point
* error handling (very rare). Save them from a meaningless panic.
*/
if (eisa_port == 0xff)
return(retval);
if (eisa_port & ENMI_WATCHDOG) {
log(LOG_CRIT, "EISA watchdog timer expired, likely hardware failure.");
retval = 1;
}
if (eisa_port & ENMI_BUSTIMER) {
log(LOG_CRIT, "EISA bus timeout, likely hardware failure.");
retval = 1;
}
if (eisa_port & ENMI_IOSTATUS) {
log(LOG_CRIT, "EISA I/O port status error.");
retval = 1;
}
return(retval);
}
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