i386 - Get completely rid of APIC_IO
[dragonfly.git] / sys / platform / pc32 / isa / intr_machdep.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"
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48#include "opt_auto_eoi.h"
49
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50#include <sys/param.h>
51#ifndef SMP
52#include <machine/lock.h>
53#endif
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>
62#include <sys/bus.h>
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63#include <machine/globaldata.h>
64#include <sys/proc.h>
65#include <sys/thread2.h>
37e7efec 66#include <sys/machintr.h>
984263bc 67
96728c05 68#include <machine/smp.h>
21ce0dfa 69#include <bus/isa/isa.h>
a9295349 70#include <machine_base/icu/icu.h>
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71
72#if NISA > 0
1f2de5d4 73#include <bus/isa/isavar.h>
984263bc 74#endif
a9295349 75#include <machine_base/isa/intr_machdep.h>
984263bc 76#include <sys/interrupt.h>
984263bc 77#include <machine/clock.h>
cb973d15 78#include <machine/cpu.h>
984263bc 79
984263bc 80/* XXX should be in suitable include files */
984263bc 81#define ICU_IMR_OFFSET 1 /* IO_ICU{1,2} + 1 */
984263bc 82
bf3e6b54 83static void init_i8259(void);
385b2dc2 84
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85#define NMI_PARITY (1 << 7)
86#define NMI_IOCHAN (1 << 6)
87#define ENMI_WATCHDOG (1 << 7)
88#define ENMI_BUSTIMER (1 << 6)
89#define ENMI_IOSTATUS (1 << 5)
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90
91/*
92 * Handle a NMI, possibly a machine check.
93 * return true to panic system, false to ignore.
94 */
95int
09e6e929 96isa_nmi(int cd)
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97{
98 int retval = 0;
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99 int isa_port = inb(0x61);
100 int eisa_port = inb(0x461);
101
102 log(LOG_CRIT, "NMI ISA %x, EISA %x\n", isa_port, eisa_port);
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103
104 if (isa_port & NMI_PARITY) {
105 log(LOG_CRIT, "RAM parity error, likely hardware failure.");
106 retval = 1;
107 }
108
109 if (isa_port & NMI_IOCHAN) {
110 log(LOG_CRIT, "I/O channel check, likely hardware failure.");
111 retval = 1;
112 }
113
114 /*
115 * On a real EISA machine, this will never happen. However it can
116 * happen on ISA machines which implement XT style floating point
117 * error handling (very rare). Save them from a meaningless panic.
118 */
119 if (eisa_port == 0xff)
120 return(retval);
121
122 if (eisa_port & ENMI_WATCHDOG) {
123 log(LOG_CRIT, "EISA watchdog timer expired, likely hardware failure.");
124 retval = 1;
125 }
126
127 if (eisa_port & ENMI_BUSTIMER) {
128 log(LOG_CRIT, "EISA bus timeout, likely hardware failure.");
129 retval = 1;
130 }
131
132 if (eisa_port & ENMI_IOSTATUS) {
133 log(LOG_CRIT, "EISA I/O port status error.");
134 retval = 1;
135 }
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136 return(retval);
137}
138
139/*
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140 * ICU reinitialize when ICU configuration has lost.
141 */
142void
09e6e929 143icu_reinit(void)
bf3e6b54 144{
477d3c1c 145 int i;
bf3e6b54 146
477d3c1c 147 init_i8259();
5f456c40 148 for (i = 0; i < MAX_HARDINTS; ++i) {
477d3c1c 149 if (count_registered_ints(i))
37e7efec 150 machintr_intren(i);
477d3c1c 151 }
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152}
153
bf3e6b54 154/*
b46d0159 155 * Fill in default interrupt table (in case of spurious interrupt
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156 * during configuration of kernel, setup interrupt control unit
157 */
158void
09e6e929 159isa_defaultirq(void)
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160{
161 int i;
162
163 /* icu vectors */
5f456c40 164 for (i = 0; i < MAX_HARDINTS; i++)
35408d22 165 machintr_vector_setdefault(i);
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166 init_i8259();
167}
168
169static void
170init_i8259(void)
171{
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172
173 /* initialize 8259's */
af90f33e 174 outb(IO_ICU1, 0x11); /* reset; program device, four bytes */
97359a5b 175 outb(IO_ICU1+ICU_IMR_OFFSET, IDT_OFFSET); /* starting at this vector index */
59843dd6 176 outb(IO_ICU1+ICU_IMR_OFFSET, 1 << ICU_IRQ_SLAVE); /* slave on line 2 */
984263bc 177#ifdef AUTO_EOI_1
79b62055 178 int auto_eoi = 2; /* auto EOI, 8086 mode */
984263bc 179#else
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180 int auto_eoi = 0; /* 8086 mode */
181#endif
182#ifdef SMP
183 if (apic_io_enable)
184 auto_eoi = 2; /* auto EOI, 8086 mode */
984263bc 185#endif
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186 outb(IO_ICU1+ICU_IMR_OFFSET, auto_eoi | 1);
187
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188 outb(IO_ICU1+ICU_IMR_OFFSET, 0xff); /* leave interrupts masked */
189 outb(IO_ICU1, 0x0a); /* default to IRR on read */
984263bc 190 outb(IO_ICU1, 0xc0 | (3 - 1)); /* pri order 3-7, 0-2 (com2 first) */
af90f33e 191 outb(IO_ICU2, 0x11); /* reset; program device, four bytes */
97359a5b 192 outb(IO_ICU2+ICU_IMR_OFFSET, IDT_OFFSET+8); /* staring at this vector index */
10ff1029 193 outb(IO_ICU2+ICU_IMR_OFFSET, ICU_IRQ_SLAVE);
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194#ifdef AUTO_EOI_2
195 outb(IO_ICU2+ICU_IMR_OFFSET, 2 | 1); /* auto EOI, 8086 mode */
196#else
197 outb(IO_ICU2+ICU_IMR_OFFSET,1); /* 8086 mode */
198#endif
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199 outb(IO_ICU2+ICU_IMR_OFFSET, 0xff); /* leave interrupts masked */
200 outb(IO_ICU2, 0x0a); /* default to IRR on read */
201}
202
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203#if NISA > 0
204/*
205 * Return a bitmap of the current interrupt requests. This is 8259-specific
206 * and is only suitable for use at probe time.
207 */
208intrmask_t
f15db79e 209isa_irq_pending(void)
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210{
211 u_char irr1;
212 u_char irr2;
213
214 irr1 = inb(IO_ICU1);
215 irr2 = inb(IO_ICU2);
216 return ((irr2 << 8) | irr1);
217}
59843dd6 218
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219#endif
220
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221/* The following notice applies beyond this point in the file */
222
223/*
224 * Copyright (c) 1997, Stefan Esser <se@freebsd.org>
225 * All rights reserved.
226 *
227 * Redistribution and use in source and binary forms, with or without
228 * modification, are permitted provided that the following conditions
229 * are met:
230 * 1. Redistributions of source code must retain the above copyright
231 * notice unmodified, this list of conditions, and the following
232 * disclaimer.
233 * 2. Redistributions in binary form must reproduce the above copyright
234 * notice, this list of conditions and the following disclaimer in the
235 * documentation and/or other materials provided with the distribution.
236 *
237 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
238 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
239 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
240 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
241 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
242 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
243 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
244 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
245 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
246 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
247 *
248 * $FreeBSD: src/sys/i386/isa/intr_machdep.c,v 1.29.2.5 2001/10/14 06:54:27 luigi Exp $
249 *
250 */
251
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252#ifdef SMP
253/*
254 * forward_fast_remote()
255 *
256 * This function is called from the receiving end of an IPIQ when a
257 * remote cpu wishes to forward a fast interrupt to us. All we have to
258 * do is set the interrupt pending and let the IPI's doreti deal with it.
259 */
260void
261forward_fastint_remote(void *arg)
262{
263 int irq = (int)arg;
264 struct mdglobaldata *gd = mdcpu;
265
266 atomic_set_int_nonlocked(&gd->gd_fpending, 1 << irq);
235957ed 267 atomic_set_int_nonlocked(&gd->mi.gd_reqflags, RQF_INTPEND);
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268}
269
270#endif