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 1.47 2006/11/07 06:43:24 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/smp.h>
69 #include <bus/isa/i386/isa.h>
70 #include <machine_base/icu/icu.h>
73 #include <bus/isa/isavar.h>
75 #include <machine_base/isa/intr_machdep.h>
76 #include <sys/interrupt.h>
77 #include <machine/clock.h>
78 #include <machine/cpu.h>
80 /* XXX should be in suitable include files */
81 #define ICU_IMR_OFFSET 1 /* IO_ICU{1,2} + 1 */
85 * This is to accommodate "mixed-mode" programming for
86 * motherboards that don't connect the 8254 to the IO APIC.
91 static void init_i8259(void);
93 #define NMI_PARITY (1 << 7)
94 #define NMI_IOCHAN (1 << 6)
95 #define ENMI_WATCHDOG (1 << 7)
96 #define ENMI_BUSTIMER (1 << 6)
97 #define ENMI_IOSTATUS (1 << 5)
100 * Handle a NMI, possibly a machine check.
101 * return true to panic system, false to ignore.
107 int isa_port
= inb(0x61);
108 int eisa_port
= inb(0x461);
110 log(LOG_CRIT
, "NMI ISA %x, EISA %x\n", isa_port
, eisa_port
);
112 if (isa_port
& NMI_PARITY
) {
113 log(LOG_CRIT
, "RAM parity error, likely hardware failure.");
117 if (isa_port
& NMI_IOCHAN
) {
118 log(LOG_CRIT
, "I/O channel check, likely hardware failure.");
123 * On a real EISA machine, this will never happen. However it can
124 * happen on ISA machines which implement XT style floating point
125 * error handling (very rare). Save them from a meaningless panic.
127 if (eisa_port
== 0xff)
130 if (eisa_port
& ENMI_WATCHDOG
) {
131 log(LOG_CRIT
, "EISA watchdog timer expired, likely hardware failure.");
135 if (eisa_port
& ENMI_BUSTIMER
) {
136 log(LOG_CRIT
, "EISA bus timeout, likely hardware failure.");
140 if (eisa_port
& ENMI_IOSTATUS
) {
141 log(LOG_CRIT
, "EISA I/O port status error.");
148 * ICU reinitialize when ICU configuration has lost.
156 for (i
= 0; i
< MAX_HARDINTS
; ++i
) {
157 if (count_registered_ints(i
))
163 * Fill in default interrupt table (in case of spurious interrupt
164 * during configuration of kernel, setup interrupt control unit
172 for (i
= 0; i
< MAX_HARDINTS
; i
++)
173 machintr_vector_setdefault(i
);
181 /* initialize 8259's */
182 outb(IO_ICU1
, 0x11); /* reset; program device, four bytes */
183 outb(IO_ICU1
+ICU_IMR_OFFSET
, IDT_OFFSET
); /* starting at this vector index */
184 outb(IO_ICU1
+ICU_IMR_OFFSET
, 1 << ICU_IRQ_SLAVE
); /* slave on line 2 */
186 outb(IO_ICU1
+ICU_IMR_OFFSET
, 2 | 1); /* auto EOI, 8086 mode */
188 outb(IO_ICU1
+ICU_IMR_OFFSET
, 1); /* 8086 mode */
190 outb(IO_ICU1
+ICU_IMR_OFFSET
, 0xff); /* leave interrupts masked */
191 outb(IO_ICU1
, 0x0a); /* default to IRR on read */
192 outb(IO_ICU1
, 0xc0 | (3 - 1)); /* pri order 3-7, 0-2 (com2 first) */
193 outb(IO_ICU2
, 0x11); /* reset; program device, four bytes */
194 outb(IO_ICU2
+ICU_IMR_OFFSET
, IDT_OFFSET
+8); /* staring at this vector index */
195 outb(IO_ICU2
+ICU_IMR_OFFSET
, ICU_IRQ_SLAVE
);
197 outb(IO_ICU2
+ICU_IMR_OFFSET
, 2 | 1); /* auto EOI, 8086 mode */
199 outb(IO_ICU2
+ICU_IMR_OFFSET
,1); /* 8086 mode */
201 outb(IO_ICU2
+ICU_IMR_OFFSET
, 0xff); /* leave interrupts masked */
202 outb(IO_ICU2
, 0x0a); /* default to IRR on read */
207 * Return a bitmap of the current interrupt requests. This is 8259-specific
208 * and is only suitable for use at probe time.
211 isa_irq_pending(void)
218 return ((irr2
<< 8) | irr1
);
223 /* The following notice applies beyond this point in the file */
226 * Copyright (c) 1997, Stefan Esser <se@freebsd.org>
227 * All rights reserved.
229 * Redistribution and use in source and binary forms, with or without
230 * modification, are permitted provided that the following conditions
232 * 1. Redistributions of source code must retain the above copyright
233 * notice unmodified, this list of conditions, and the following
235 * 2. Redistributions in binary form must reproduce the above copyright
236 * notice, this list of conditions and the following disclaimer in the
237 * documentation and/or other materials provided with the distribution.
239 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
240 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
241 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
242 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
243 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
244 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
245 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
246 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
247 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
248 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
250 * $FreeBSD: src/sys/i386/isa/intr_machdep.c,v 1.29.2.5 2001/10/14 06:54:27 luigi Exp $
256 * forward_fast_remote()
258 * This function is called from the receiving end of an IPIQ when a
259 * remote cpu wishes to forward a fast interrupt to us. All we have to
260 * do is set the interrupt pending and let the IPI's doreti deal with it.
263 forward_fastint_remote(void *arg
)
266 struct mdglobaldata
*gd
= mdcpu
;
268 atomic_set_int_nonlocked(&gd
->gd_fpending
, 1 << irq
);
269 atomic_set_int_nonlocked(&gd
->mi
.gd_reqflags
, RQF_INTPEND
);