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 * $DragonFly: src/sys/platform/pc64/isa/intr_machdep.c,v 1.1 2008/08/29 17:07:19 dillon Exp $ 40 */ 41 /* 42 * This file contains an aggregated module marked: 43 * Copyright (c) 1997, Stefan Esser <se@freebsd.org> 44 * All rights reserved. 45 * See the notice for details. 46 */ 47 48 #include "use_isa.h" 49 50 #include <sys/param.h> 51 #include <sys/systm.h> 52 #include <sys/syslog.h> 53 #include <sys/bus.h> 54 #include <bus/isa/isavar.h> 55 56 #include <machine_base/icu/icu_var.h> 57 #include <machine_base/isa/isa_intr.h> 58 59 #define NMI_PARITY (1 << 7) 60 #define NMI_IOCHAN (1 << 6) 61 #define ENMI_WATCHDOG (1 << 7) 62 #define ENMI_BUSTIMER (1 << 6) 63 #define ENMI_IOSTATUS (1 << 5) 64 65 /* 66 * Handle a NMI, possibly a machine check. 67 * return true to panic system, false to ignore. 68 */ 69 int 70 isa_nmi(int cd) 71 { 72 int retval = 0; 73 int isa_port = inb(0x61); 74 int eisa_port = inb(0x461); 75 76 log(LOG_CRIT, "NMI ISA %x, EISA %x\n", isa_port, eisa_port); 77 78 if (isa_port & NMI_PARITY) { 79 log(LOG_CRIT, "RAM parity error, likely hardware failure."); 80 retval = 1; 81 } 82 83 if (isa_port & NMI_IOCHAN) { 84 log(LOG_CRIT, "I/O channel check, likely hardware failure."); 85 retval = 1; 86 } 87 88 /* 89 * On a real EISA machine, this will never happen. However it can 90 * happen on ISA machines which implement XT style floating point 91 * error handling (very rare). Save them from a meaningless panic. 92 */ 93 if (eisa_port == 0xff) 94 return(retval); 95 96 if (eisa_port & ENMI_WATCHDOG) { 97 log(LOG_CRIT, "EISA watchdog timer expired, likely hardware failure."); 98 retval = 1; 99 } 100 101 if (eisa_port & ENMI_BUSTIMER) { 102 log(LOG_CRIT, "EISA bus timeout, likely hardware failure."); 103 retval = 1; 104 } 105 106 if (eisa_port & ENMI_IOSTATUS) { 107 log(LOG_CRIT, "EISA I/O port status error."); 108 retval = 1; 109 } 110 return(retval); 111 } 112 113 /* 114 * Fill in default interrupt table (in case of spurious interrupt 115 * during configuration of kernel, setup interrupt control unit 116 */ 117 void 118 isa_defaultirq(void) 119 { 120 icu_definit(); 121 } 122 123 #if NISA > 0 124 125 intrmask_t 126 isa_irq_pending(void) 127 { 128 return icu_irq_pending(); 129 } 130 131 #endif 132