1 /*- 2 * Copyright (c) 1991 The Regents of the University of California. 3 * Copyright (c) 2008 The DragonFly Project. 4 * All rights reserved. 5 * 6 * This code is derived from software contributed to Berkeley by 7 * William Jolitz. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * from: @(#)isa.c 7.2 (Berkeley) 5/13/91 34 * $FreeBSD: src/sys/i386/isa/intr_machdep.c,v 1.29.2.5 2001/10/14 06:54:27 luigi Exp $ 35 */ 36 /* 37 * This file contains an aggregated module marked: 38 * Copyright (c) 1997, Stefan Esser <se@freebsd.org> 39 * All rights reserved. 40 * See the notice for details. 41 */ 42 43 #include <sys/param.h> 44 #include <sys/systm.h> 45 #include <sys/syslog.h> 46 #include <sys/bus.h> 47 #include <bus/isa/isavar.h> 48 49 #include <machine_base/icu/icu_var.h> 50 #include <machine_base/isa/isa_intr.h> 51 52 #define NMI_PARITY (1 << 7) 53 #define NMI_IOCHAN (1 << 6) 54 #define ENMI_WATCHDOG (1 << 7) 55 #define ENMI_BUSTIMER (1 << 6) 56 #define ENMI_IOSTATUS (1 << 5) 57 58 /* 59 * Handle a NMI, possibly a machine check. 60 * return true to panic system, false to ignore. 61 */ 62 int 63 isa_nmi(int cd) 64 { 65 int retval = 0; 66 int isa_port = inb(0x61); 67 int eisa_port = inb(0x461); 68 69 log(LOG_CRIT, "NMI ISA %x, EISA %x\n", isa_port, eisa_port); 70 71 if (isa_port & NMI_PARITY) { 72 log(LOG_CRIT, "RAM parity error, likely hardware failure."); 73 retval = 1; 74 } 75 76 if (isa_port & NMI_IOCHAN) { 77 log(LOG_CRIT, "I/O channel check, likely hardware failure."); 78 retval = 1; 79 } 80 81 /* 82 * On a real EISA machine, this will never happen. However it can 83 * happen on ISA machines which implement XT style floating point 84 * error handling (very rare). Save them from a meaningless panic. 85 */ 86 if (eisa_port == 0xff) 87 return(retval); 88 89 if (eisa_port & ENMI_WATCHDOG) { 90 log(LOG_CRIT, "EISA watchdog timer expired, likely hardware failure."); 91 retval = 1; 92 } 93 94 if (eisa_port & ENMI_BUSTIMER) { 95 log(LOG_CRIT, "EISA bus timeout, likely hardware failure."); 96 retval = 1; 97 } 98 99 if (eisa_port & ENMI_IOSTATUS) { 100 log(LOG_CRIT, "EISA I/O port status error."); 101 retval = 1; 102 } 103 return(retval); 104 } 105 106 /* 107 * Fill in default interrupt table (in case of spurious interrupt 108 * during configuration of kernel, setup interrupt control unit 109 */ 110 void 111 isa_defaultirq(void) 112 { 113 icu_definit(); 114 } 115 116 intrmask_t 117 isa_irq_pending(void) 118 { 119 return icu_irq_pending(); 120 } 121