2 * Copyright (c) 1991 The Regents of the University of California.
5 * This code is derived from software contributed to Berkeley by
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
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.
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
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 $
38 * $DragonFly: src/sys/platform/pc32/isa/intr_machdep.c,v 1.38 2005/11/02 20:23:22 dillon Exp $
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.
48 #include "opt_auto_eoi.h"
50 #include <sys/param.h>
52 #include <machine/lock.h>
54 #include <sys/systm.h>
55 #include <sys/syslog.h>
56 #include <sys/malloc.h>
57 #include <sys/errno.h>
58 #include <sys/interrupt.h>
59 #include <machine/ipl.h>
60 #include <machine/md_var.h>
61 #include <machine/segments.h>
63 #include <machine/globaldata.h>
65 #include <sys/thread2.h>
66 #include <sys/machintr.h>
68 #include <machine/smptests.h>
69 #include <machine/smp.h>
70 #include <bus/isa/i386/isa.h>
71 #include <i386/icu/icu.h>
74 #include <bus/isa/isavar.h>
76 #include <i386/isa/intr_machdep.h>
77 #include <bus/isa/isavar.h>
78 #include <sys/interrupt.h>
80 #include <machine/clock.h>
82 #include <machine/cpu.h>
84 /* XXX should be in suitable include files */
85 #define ICU_IMR_OFFSET 1 /* IO_ICU{1,2} + 1 */
89 * This is to accommodate "mixed-mode" programming for
90 * motherboards that don't connect the 8254 to the IO APIC.
95 #define NR_INTRNAMES (1 + ICU_LEN + 2 * ICU_LEN)
97 static void init_i8259(void);
99 #define NMI_PARITY (1 << 7)
100 #define NMI_IOCHAN (1 << 6)
101 #define ENMI_WATCHDOG (1 << 7)
102 #define ENMI_BUSTIMER (1 << 6)
103 #define ENMI_IOSTATUS (1 << 5)
106 * Handle a NMI, possibly a machine check.
107 * return true to panic system, false to ignore.
114 int isa_port = inb(0x61);
115 int eisa_port = inb(0x461);
117 log(LOG_CRIT, "NMI ISA %x, EISA %x\n", isa_port, eisa_port);
119 if (isa_port & NMI_PARITY) {
120 log(LOG_CRIT, "RAM parity error, likely hardware failure.");
124 if (isa_port & NMI_IOCHAN) {
125 log(LOG_CRIT, "I/O channel check, likely hardware failure.");
130 * On a real EISA machine, this will never happen. However it can
131 * happen on ISA machines which implement XT style floating point
132 * error handling (very rare). Save them from a meaningless panic.
134 if (eisa_port == 0xff)
137 if (eisa_port & ENMI_WATCHDOG) {
138 log(LOG_CRIT, "EISA watchdog timer expired, likely hardware failure.");
142 if (eisa_port & ENMI_BUSTIMER) {
143 log(LOG_CRIT, "EISA bus timeout, likely hardware failure.");
147 if (eisa_port & ENMI_IOSTATUS) {
148 log(LOG_CRIT, "EISA I/O port status error.");
155 * ICU reinitialize when ICU configuration has lost.
163 for (i = 0; i < ICU_LEN; ++i) {
164 if (count_registered_ints(i))
170 * Fill in default interrupt table (in case of spurious interrupt
171 * during configuration of kernel, setup interrupt control unit
179 for (i = 0; i < ICU_LEN; i++)
180 machintr_vector_teardown(i);
188 /* initialize 8259's */
189 outb(IO_ICU1, 0x11); /* reset; program device, four bytes */
190 outb(IO_ICU1+ICU_IMR_OFFSET, NRSVIDT); /* starting at this vector index */
191 outb(IO_ICU1+ICU_IMR_OFFSET, 1 << ICU_IRQ_SLAVE); /* slave on line 7 */
193 outb(IO_ICU1+ICU_IMR_OFFSET, 2 | 1); /* auto EOI, 8086 mode */
195 outb(IO_ICU1+ICU_IMR_OFFSET, 1); /* 8086 mode */
197 outb(IO_ICU1+ICU_IMR_OFFSET, 0xff); /* leave interrupts masked */
198 outb(IO_ICU1, 0x0a); /* default to IRR on read */
199 outb(IO_ICU1, 0xc0 | (3 - 1)); /* pri order 3-7, 0-2 (com2 first) */
200 outb(IO_ICU2, 0x11); /* reset; program device, four bytes */
201 outb(IO_ICU2+ICU_IMR_OFFSET, NRSVIDT+8); /* staring at this vector index */
202 outb(IO_ICU2+ICU_IMR_OFFSET, ICU_IRQ_SLAVE);
204 outb(IO_ICU2+ICU_IMR_OFFSET, 2 | 1); /* auto EOI, 8086 mode */
206 outb(IO_ICU2+ICU_IMR_OFFSET,1); /* 8086 mode */
208 outb(IO_ICU2+ICU_IMR_OFFSET, 0xff); /* leave interrupts masked */
209 outb(IO_ICU2, 0x0a); /* default to IRR on read */
214 * Return a bitmap of the current interrupt requests. This is 8259-specific
215 * and is only suitable for use at probe time.
218 isa_irq_pending(void)
225 return ((irr2 << 8) | irr1);
229 /* The following notice applies beyond this point in the file */
232 * Copyright (c) 1997, Stefan Esser <se@freebsd.org>
233 * All rights reserved.
235 * Redistribution and use in source and binary forms, with or without
236 * modification, are permitted provided that the following conditions
238 * 1. Redistributions of source code must retain the above copyright
239 * notice unmodified, this list of conditions, and the following
241 * 2. Redistributions in binary form must reproduce the above copyright
242 * notice, this list of conditions and the following disclaimer in the
243 * documentation and/or other materials provided with the distribution.
245 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
246 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
247 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
248 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
249 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
250 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
251 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
252 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
253 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
254 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
256 * $FreeBSD: src/sys/i386/isa/intr_machdep.c,v 1.29.2.5 2001/10/14 06:54:27 luigi Exp $
261 * Create and activate an interrupt handler descriptor data structure.
263 * The dev_instance pointer is required for resource management, and will
264 * only be passed through to resource_claim().
266 * There will be functions that derive a driver and unit name from a
267 * dev_instance variable, and those functions will be used to maintain the
268 * interrupt counter label array referenced by systat and vmstat to report
269 * device interrupt rates (->update_intrlabels).
271 * Add the interrupt handler descriptor data structure created by an
272 * earlier call of create_intr() to the linked list for its irq.
274 * WARNING: This is an internal function and not to be used by device
275 * drivers. It is subject to change without notice.
279 inthand_add(const char *name, int irq, inthand2_t handler, void *arg,
280 int flags, lwkt_serialize_t serializer)
285 if ((unsigned)irq >= ICU_LEN) {
286 printf("create_intr: requested irq%d too high, limit is %d\n",
291 * Register the interrupt, then setup the ICU
293 id = register_int(irq, handler, arg, name, serializer, flags);
296 printf("Unable to install handler for %s\n", name);
297 printf("\tdevice combination not supported on irq %d\n", irq);
302 if (count_registered_ints(irq) == 1) {
303 if (machintr_vector_setup(irq, flags))
313 printf("\tinthand_add(irq%d) failed, result=%d\n",
323 * Deactivate and remove the interrupt handler descriptor data connected
324 * created by an earlier call of intr_connect() from the linked list.
326 * Return the memory held by the interrupt handler descriptor data structure
327 * to the system. Make sure, the handler is not actively used anymore, before.
330 inthand_remove(void *id)
338 irq = get_registered_intr(id);
339 if (unregister_int(id) == 0) {
340 machintr_vector_teardown(irq);
348 * forward_fast_remote()
350 * This function is called from the receiving end of an IPIQ when a
351 * remote cpu wishes to forward a fast interrupt to us. All we have to
352 * do is set the interrupt pending and let the IPI's doreti deal with it.
355 forward_fastint_remote(void *arg)
358 struct mdglobaldata *gd = mdcpu;
360 atomic_set_int_nonlocked(&gd->gd_fpending, 1 << irq);
361 atomic_set_int_nonlocked(&gd->mi.gd_reqflags, RQF_INTPEND);