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. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software developed by the University of 20 * California, Berkeley and its contributors. 21 * 4. Neither the name of the University nor the names of its contributors 22 * may be used to endorse or promote products derived from this software 23 * without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 28 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 35 * SUCH DAMAGE. 36 * 37 * from: @(#)isa.c 7.2 (Berkeley) 5/13/91 38 * $FreeBSD: src/sys/i386/isa/intr_machdep.c,v 1.29.2.5 2001/10/14 06:54:27 luigi Exp $ 39 */ 40 /* 41 * This file contains an aggregated module marked: 42 * Copyright (c) 1997, Stefan Esser <se@freebsd.org> 43 * All rights reserved. 44 * See the notice for details. 45 */ 46 47 #include <sys/param.h> 48 #include <sys/systm.h> 49 #include <sys/syslog.h> 50 #include <sys/bus.h> 51 #include <bus/isa/isavar.h> 52 53 #include <machine_base/icu/icu_var.h> 54 #include <machine_base/isa/isa_intr.h> 55 56 #define NMI_PARITY (1 << 7) 57 #define NMI_IOCHAN (1 << 6) 58 #define ENMI_WATCHDOG (1 << 7) 59 #define ENMI_BUSTIMER (1 << 6) 60 #define ENMI_IOSTATUS (1 << 5) 61 62 /* 63 * Handle a NMI, possibly a machine check. 64 * return true to panic system, false to ignore. 65 */ 66 int 67 isa_nmi(int cd) 68 { 69 int retval = 0; 70 int isa_port = inb(0x61); 71 int eisa_port = inb(0x461); 72 73 log(LOG_CRIT, "NMI ISA %x, EISA %x\n", isa_port, eisa_port); 74 75 if (isa_port & NMI_PARITY) { 76 log(LOG_CRIT, "RAM parity error, likely hardware failure."); 77 retval = 1; 78 } 79 80 if (isa_port & NMI_IOCHAN) { 81 log(LOG_CRIT, "I/O channel check, likely hardware failure."); 82 retval = 1; 83 } 84 85 /* 86 * On a real EISA machine, this will never happen. However it can 87 * happen on ISA machines which implement XT style floating point 88 * error handling (very rare). Save them from a meaningless panic. 89 */ 90 if (eisa_port == 0xff) 91 return(retval); 92 93 if (eisa_port & ENMI_WATCHDOG) { 94 log(LOG_CRIT, "EISA watchdog timer expired, likely hardware failure."); 95 retval = 1; 96 } 97 98 if (eisa_port & ENMI_BUSTIMER) { 99 log(LOG_CRIT, "EISA bus timeout, likely hardware failure."); 100 retval = 1; 101 } 102 103 if (eisa_port & ENMI_IOSTATUS) { 104 log(LOG_CRIT, "EISA I/O port status error."); 105 retval = 1; 106 } 107 return(retval); 108 } 109 110 /* 111 * Fill in default interrupt table (in case of spurious interrupt 112 * during configuration of kernel, setup interrupt control unit 113 */ 114 void 115 isa_defaultirq(void) 116 { 117 icu_definit(); 118 } 119 120 intrmask_t 121 isa_irq_pending(void) 122 { 123 return icu_irq_pending(); 124 } 125