icu: Split out icu/icu.c
[dragonfly.git] / sys / platform / pc64 / icu / icu.c
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1b505979
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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 $
38 * $DragonFly: src/sys/platform/pc32/isa/intr_machdep.c,v 1.48 2008/08/02 01:14:43 dillon Exp $
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
47#include "opt_auto_eoi.h"
48
49#include <sys/param.h>
50#include <sys/systm.h>
51#include <sys/machintr.h>
52#include <sys/interrupt.h>
53#include <bus/isa/isareg.h>
54#include <cpu/cpufunc.h>
55#include <machine/smp.h>
56#include <machine_base/isa/intr_machdep.h>
57#include <machine_base/icu/icu.h>
58#include <machine_base/icu/icu_var.h>
59
60static void icu_init(void);
61
62static void
63icu_init(void)
64{
65#ifdef AUTO_EOI_1
66 int auto_eoi = 2; /* auto EOI, 8086 mode */
67#else
68 int auto_eoi = 0; /* 8086 mode */
69#endif
70
71#ifdef SMP
72 if (apic_io_enable)
73 auto_eoi = 2; /* auto EOI, 8086 mode */
74#endif
75
76 /*
77 * Program master
78 */
79 outb(IO_ICU1, 0x11); /* reset; program device, four bytes */
80 outb(IO_ICU1 + ICU_IMR_OFFSET, IDT_OFFSET);
81 /* starting at this vector index */
82 outb(IO_ICU1 + ICU_IMR_OFFSET, 1 << ICU_IRQ_SLAVE);
83 /* slave on line 2 */
84 outb(IO_ICU1 + ICU_IMR_OFFSET, auto_eoi | 1); /* 8086 mode */
85
86 outb(IO_ICU1 + ICU_IMR_OFFSET, 0xff); /* leave interrupts masked */
87 outb(IO_ICU1, 0x0a); /* default to IRR on read */
88 outb(IO_ICU1, 0xc0 | (3 - 1)); /* pri order 3-7, 0-2 (com2 first) */
89
90 /*
91 * Program slave
92 */
93 outb(IO_ICU2, 0x11); /* reset; program device, four bytes */
94 outb(IO_ICU2 + ICU_IMR_OFFSET, IDT_OFFSET + 8);
95 /* staring at this vector index */
96 outb(IO_ICU2 + ICU_IMR_OFFSET, ICU_IRQ_SLAVE);
97#ifdef AUTO_EOI_2
98 outb(IO_ICU2 + ICU_IMR_OFFSET, 2 | 1); /* auto EOI, 8086 mode */
99#else
100 outb(IO_ICU2 + ICU_IMR_OFFSET, 1); /* 8086 mode */
101#endif
102
103 outb(IO_ICU2 + ICU_IMR_OFFSET, 0xff); /* leave interrupts masked */
104 outb(IO_ICU2, 0x0a); /* default to IRR on read */
105}
106
107void
108icu_definit(void)
109{
110 register_t ef;
111
112 KKASSERT(MachIntrABI.type == MACHINTR_ICU);
113
114 ef = read_rflags();
115 cpu_disable_intr();
116
117 /* Leave interrupts masked */
118 outb(IO_ICU1 + ICU_IMR_OFFSET, 0xff);
119 outb(IO_ICU2 + ICU_IMR_OFFSET, 0xff);
120
121 MachIntrABI.setdefault();
122 icu_init();
123
124 write_rflags(ef);
125}
126
127/*
128 * ICU reinitialize when ICU configuration has lost.
129 */
130void
131icu_reinit(void)
132{
133 int i;
134
135 icu_init();
136 for (i = 0; i < MAX_HARDINTS; ++i) {
137 if (count_registered_ints(i))
138 machintr_intren(i);
139 }
140}
141
142/*
143 * Return a bitmap of the current interrupt requests. This is 8259-specific
144 * and is only suitable for use at probe time.
145 */
146intrmask_t
147icu_irq_pending(void)
148{
149 u_char irr1;
150 u_char irr2;
151
152 irr1 = inb(IO_ICU1);
153 irr2 = inb(IO_ICU2);
154 return ((irr2 << 8) | irr1);
155}