1 /*- 2 * Copyright (c) 1991 The Regents of the University of California. 3 * All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * William Jolitz. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 4. Neither the name of the University nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 * 32 * from: @(#)isa.c 7.2 (Berkeley) 5/13/91 33 */ 34 35 #include <sys/cdefs.h> 36 __FBSDID("$FreeBSD$"); 37 38 #include "opt_mca.h" 39 40 #include <sys/types.h> 41 #include <sys/syslog.h> 42 #include <sys/systm.h> 43 44 #include <machine/md_var.h> 45 46 #ifdef DEV_MCA 47 #include <i386/bios/mca_machdep.h> 48 #endif 49 50 #define NMI_PARITY (1 << 7) 51 #define NMI_IOCHAN (1 << 6) 52 #define ENMI_WATCHDOG (1 << 7) 53 #define ENMI_BUSTIMER (1 << 6) 54 #define ENMI_IOSTATUS (1 << 5) 55 56 /* 57 * Handle a NMI, possibly a machine check. 58 * return true to panic system, false to ignore. 59 */ 60 int 61 isa_nmi(int cd) 62 { 63 int retval = 0; 64 int isa_port = inb(0x61); 65 int eisa_port = inb(0x461); 66 67 log(LOG_CRIT, "NMI ISA %x, EISA %x\n", isa_port, eisa_port); 68 #ifdef DEV_MCA 69 if (MCA_system && mca_bus_nmi()) 70 return(0); 71 #endif 72 73 if (isa_port & NMI_PARITY) { 74 log(LOG_CRIT, "RAM parity error, likely hardware failure."); 75 retval = 1; 76 } 77 78 if (isa_port & NMI_IOCHAN) { 79 log(LOG_CRIT, "I/O channel check, likely hardware failure."); 80 retval = 1; 81 } 82 83 /* 84 * On a real EISA machine, this will never happen. However it can 85 * happen on ISA machines which implement XT style floating point 86 * error handling (very rare). Save them from a meaningless panic. 87 */ 88 if (eisa_port == 0xff) 89 return(retval); 90 91 if (eisa_port & ENMI_WATCHDOG) { 92 log(LOG_CRIT, "EISA watchdog timer expired, likely hardware failure."); 93 retval = 1; 94 } 95 96 if (eisa_port & ENMI_BUSTIMER) { 97 log(LOG_CRIT, "EISA bus timeout, likely hardware failure."); 98 retval = 1; 99 } 100 101 if (eisa_port & ENMI_IOSTATUS) { 102 log(LOG_CRIT, "EISA I/O port status error."); 103 retval = 1; 104 } 105 106 return(retval); 107 } 108