2 * Copyright (c) 1991 The Regents of the University of California.
3 * Copyright (c) 2008 The DragonFly Project.
6 * This code is derived from software contributed to Berkeley by
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
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.
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
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 $
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.
49 //#include "opt_auto_eoi.h"
51 #include <sys/param.h>
53 #include <machine/lock.h>
55 #include <sys/systm.h>
56 #include <sys/syslog.h>
57 #include <sys/malloc.h>
58 #include <sys/errno.h>
59 #include <sys/interrupt.h>
60 #include <machine/ipl.h>
61 #include <machine/md_var.h>
62 #include <machine/segments.h>
64 #include <machine/globaldata.h>
66 #include <sys/thread2.h>
67 #include <sys/machintr.h>
69 #include <machine/smp.h>
70 #include <bus/isa/isa.h>
71 #include <machine_base/icu/icu.h>
74 #include <bus/isa/isavar.h>
76 #include <machine_base/isa/intr_machdep.h>
77 #include <sys/interrupt.h>
78 #include <machine/clock.h>
79 #include <machine/cpu.h>
81 static void icu_init(void);
83 #define NMI_PARITY (1 << 7)
84 #define NMI_IOCHAN (1 << 6)
85 #define ENMI_WATCHDOG (1 << 7)
86 #define ENMI_BUSTIMER (1 << 6)
87 #define ENMI_IOSTATUS (1 << 5)
90 * Handle a NMI, possibly a machine check.
91 * return true to panic system, false to ignore.
97 int isa_port = inb(0x61);
98 int eisa_port = inb(0x461);
100 log(LOG_CRIT, "NMI ISA %x, EISA %x\n", isa_port, eisa_port);
102 if (isa_port & NMI_PARITY) {
103 log(LOG_CRIT, "RAM parity error, likely hardware failure.");
107 if (isa_port & NMI_IOCHAN) {
108 log(LOG_CRIT, "I/O channel check, likely hardware failure.");
113 * On a real EISA machine, this will never happen. However it can
114 * happen on ISA machines which implement XT style floating point
115 * error handling (very rare). Save them from a meaningless panic.
117 if (eisa_port == 0xff)
120 if (eisa_port & ENMI_WATCHDOG) {
121 log(LOG_CRIT, "EISA watchdog timer expired, likely hardware failure.");
125 if (eisa_port & ENMI_BUSTIMER) {
126 log(LOG_CRIT, "EISA bus timeout, likely hardware failure.");
130 if (eisa_port & ENMI_IOSTATUS) {
131 log(LOG_CRIT, "EISA I/O port status error.");
138 * ICU reinitialize when ICU configuration has lost.
146 for (i = 0; i < MAX_HARDINTS; ++i) {
147 if (count_registered_ints(i))
153 * Fill in default interrupt table (in case of spurious interrupt
154 * during configuration of kernel, setup interrupt control unit
161 KKASSERT(MachIntrABI.type == MACHINTR_ICU);
166 /* Leave interrupts masked */
167 outb(IO_ICU1 + ICU_IMR_OFFSET, 0xff);
168 outb(IO_ICU2 + ICU_IMR_OFFSET, 0xff);
170 MachIntrABI.setdefault();
180 int auto_eoi = 2; /* auto EOI, 8086 mode */
182 int auto_eoi = 0; /* 8086 mode */
187 auto_eoi = 2; /* auto EOI, 8086 mode */
193 outb(IO_ICU1, 0x11); /* reset; program device, four bytes */
194 outb(IO_ICU1 + ICU_IMR_OFFSET, IDT_OFFSET);
195 /* starting at this vector index */
196 outb(IO_ICU1 + ICU_IMR_OFFSET, 1 << ICU_IRQ_SLAVE);
197 /* slave on line 2 */
198 outb(IO_ICU1 + ICU_IMR_OFFSET, auto_eoi | 1); /* 8086 mode */
200 outb(IO_ICU1 + ICU_IMR_OFFSET, 0xff); /* leave interrupts masked */
201 outb(IO_ICU1, 0x0a); /* default to IRR on read */
202 outb(IO_ICU1, 0xc0 | (3 - 1)); /* pri order 3-7, 0-2 (com2 first) */
207 outb(IO_ICU2, 0x11); /* reset; program device, four bytes */
208 outb(IO_ICU2 + ICU_IMR_OFFSET, IDT_OFFSET + 8);
209 /* staring at this vector index */
210 outb(IO_ICU2 + ICU_IMR_OFFSET, ICU_IRQ_SLAVE);
212 outb(IO_ICU2 + ICU_IMR_OFFSET, 2 | 1); /* auto EOI, 8086 mode */
214 outb(IO_ICU2 + ICU_IMR_OFFSET, 1); /* 8086 mode */
217 outb(IO_ICU2 + ICU_IMR_OFFSET, 0xff); /* leave interrupts masked */
218 outb(IO_ICU2, 0x0a); /* default to IRR on read */
223 * Return a bitmap of the current interrupt requests. This is 8259-specific
224 * and is only suitable for use at probe time.
227 isa_irq_pending(void)
234 return ((irr2 << 8) | irr1);