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
isa_nmi(int cd)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
isa_defaultirq(void)111 isa_defaultirq(void)
112 {
113 icu_definit();
114 }
115
116 intrmask_t
isa_irq_pending(void)117 isa_irq_pending(void)
118 {
119 return icu_irq_pending();
120 }
121