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- /*-
- * 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>
- __FBSDID("$FreeBSD$");
- #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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