pc32: Split out isa_intr.h and move isa/intr_machdep.h to include/
[dragonfly.git] / sys / platform / pc32 / isa / isa_intr.c
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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 * 3. All advertising materials mentioning features or use of this software
17 * must display the following acknowledgement:
18 * This product includes software developed by the University of
19 * California, Berkeley and its contributors.
20 * 4. Neither the name of the University nor the names of its contributors
21 * may be used to endorse or promote products derived from this software
22 * without specific prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
35 *
36 * from: @(#)isa.c 7.2 (Berkeley) 5/13/91
37 * $FreeBSD: src/sys/i386/isa/intr_machdep.c,v 1.29.2.5 2001/10/14 06:54:27 luigi Exp $
21ce0dfa 38 * $DragonFly: src/sys/platform/pc32/isa/intr_machdep.c,v 1.48 2008/08/02 01:14:43 dillon Exp $
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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
1f2de5d4 47#include "use_isa.h"
984263bc 48
984263bc 49#include <sys/param.h>
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50#include <sys/systm.h>
51#include <sys/syslog.h>
1b505979 52#include <sys/bus.h>
1f2de5d4 53#include <bus/isa/isavar.h>
984263bc 54
1b505979 55#include <machine_base/icu/icu_var.h>
87cf6827 56#include <machine_base/isa/isa_intr.h>
385b2dc2 57
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58#define NMI_PARITY (1 << 7)
59#define NMI_IOCHAN (1 << 6)
60#define ENMI_WATCHDOG (1 << 7)
61#define ENMI_BUSTIMER (1 << 6)
62#define ENMI_IOSTATUS (1 << 5)
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63
64/*
65 * Handle a NMI, possibly a machine check.
66 * return true to panic system, false to ignore.
67 */
68int
09e6e929 69isa_nmi(int cd)
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70{
71 int retval = 0;
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72 int isa_port = inb(0x61);
73 int eisa_port = inb(0x461);
74
75 log(LOG_CRIT, "NMI ISA %x, EISA %x\n", isa_port, eisa_port);
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76
77 if (isa_port & NMI_PARITY) {
78 log(LOG_CRIT, "RAM parity error, likely hardware failure.");
79 retval = 1;
80 }
81
82 if (isa_port & NMI_IOCHAN) {
83 log(LOG_CRIT, "I/O channel check, likely hardware failure.");
84 retval = 1;
85 }
86
87 /*
88 * On a real EISA machine, this will never happen. However it can
89 * happen on ISA machines which implement XT style floating point
90 * error handling (very rare). Save them from a meaningless panic.
91 */
92 if (eisa_port == 0xff)
93 return(retval);
94
95 if (eisa_port & ENMI_WATCHDOG) {
96 log(LOG_CRIT, "EISA watchdog timer expired, likely hardware failure.");
97 retval = 1;
98 }
99
100 if (eisa_port & ENMI_BUSTIMER) {
101 log(LOG_CRIT, "EISA bus timeout, likely hardware failure.");
102 retval = 1;
103 }
104
105 if (eisa_port & ENMI_IOSTATUS) {
106 log(LOG_CRIT, "EISA I/O port status error.");
107 retval = 1;
108 }
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109 return(retval);
110}
111
112/*
b46d0159 113 * Fill in default interrupt table (in case of spurious interrupt
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114 * during configuration of kernel, setup interrupt control unit
115 */
116void
09e6e929 117isa_defaultirq(void)
984263bc 118{
1b505979 119 icu_definit();
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120}
121
984263bc 122#if NISA > 0
1b505979 123
984263bc 124intrmask_t
f15db79e 125isa_irq_pending(void)
984263bc 126{
1b505979 127 return icu_irq_pending();
984263bc 128}
59843dd6 129
984263bc 130#endif