[dragonfly.git] / sys / platform / pc32 / icu / icu.c

/*-
 * Copyright (c) 1991 The Regents of the University of California.
 * All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * William Jolitz.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *	from: @(#)isa.c	7.2 (Berkeley) 5/13/91
 * $FreeBSD: src/sys/i386/isa/intr_machdep.c,v 1.29.2.5 2001/10/14 06:54:27 luigi Exp $
 * $DragonFly: src/sys/platform/pc32/isa/intr_machdep.c,v 1.48 2008/08/02 01:14:43 dillon Exp $
 */
/*
 * This file contains an aggregated module marked:
 * Copyright (c) 1997, Stefan Esser <se@freebsd.org>
 * All rights reserved.
 * See the notice for details.
 */

#include "opt_auto_eoi.h"

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/machintr.h>
#include <sys/interrupt.h>
#include <bus/isa/isareg.h>
#include <cpu/cpufunc.h>
#include <machine/smp.h>
#include <machine/intr_machdep.h>
#include <machine_base/icu/icu.h>
#include <machine_base/icu/icu_var.h>

static void	icu_init(void);

static void
icu_init(void)
{
#ifdef AUTO_EOI_1
	int auto_eoi = 2;		/* auto EOI, 8086 mode */
#else
	int auto_eoi = 0;		/* 8086 mode */
#endif

#ifdef SMP
	if (apic_io_enable)
		auto_eoi = 2;		/* auto EOI, 8086 mode */
#endif

	/*
	 * Program master
	 */
	outb(IO_ICU1, 0x11);		/* reset; program device, four bytes */
	outb(IO_ICU1 + ICU_IMR_OFFSET, IDT_OFFSET);
					/* starting at this vector index */
	outb(IO_ICU1 + ICU_IMR_OFFSET, 1 << ICU_IRQ_SLAVE);
					/* slave on line 2 */
	outb(IO_ICU1 + ICU_IMR_OFFSET, auto_eoi | 1); /* 8086 mode */

	outb(IO_ICU1 + ICU_IMR_OFFSET, 0xff); /* leave interrupts masked */
	outb(IO_ICU1, 0x0a);		/* default to IRR on read */
	outb(IO_ICU1, 0xc0 | (3 - 1));	/* pri order 3-7, 0-2 (com2 first) */

	/*
	 * Program slave
	 */
	outb(IO_ICU2, 0x11);		/* reset; program device, four bytes */
	outb(IO_ICU2 + ICU_IMR_OFFSET, IDT_OFFSET + 8);
					/* staring at this vector index */
	outb(IO_ICU2 + ICU_IMR_OFFSET, ICU_IRQ_SLAVE);
#ifdef AUTO_EOI_2
	outb(IO_ICU2 + ICU_IMR_OFFSET, 2 | 1); /* auto EOI, 8086 mode */
#else
	outb(IO_ICU2 + ICU_IMR_OFFSET, 1); /* 8086 mode */
#endif

	outb(IO_ICU2 + ICU_IMR_OFFSET, 0xff); /* leave interrupts masked */
	outb(IO_ICU2, 0x0a);		/* default to IRR on read */
}

void
icu_definit(void)
{
	u_long ef;

	KKASSERT(MachIntrABI.type == MACHINTR_ICU);

	ef = read_eflags();
	cpu_disable_intr();

	/* Leave interrupts masked */
	outb(IO_ICU1 + ICU_IMR_OFFSET, 0xff);
	outb(IO_ICU2 + ICU_IMR_OFFSET, 0xff);

	MachIntrABI.setdefault();
	icu_init();

	write_eflags(ef);
}

/*
 *  ICU reinitialize when ICU configuration has lost.
 */
void
icu_reinit(void)
{
	int i;

	icu_init();
	for (i = 0; i < MAX_HARDINTS; ++i) {
		if (count_registered_ints(i))
			machintr_intren(i);
	}
}

/*
 * Return a bitmap of the current interrupt requests.  This is 8259-specific
 * and is only suitable for use at probe time.
 */
intrmask_t
icu_irq_pending(void)
{
	u_char irr1;
	u_char irr2;

	irr1 = inb(IO_ICU1);
	irr2 = inb(IO_ICU2);
	return ((irr2 << 8) | irr1);
}
Commit	Line	Data
1b505979 SZ	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>
87cf6827	56	#include <machine/intr_machdep.h>
1b505979 SZ	57	#include <machine_base/icu/icu.h>
	58	#include <machine_base/icu/icu_var.h>
	59
	60	static void icu_init(void);
	61
	62	static void
	63	icu_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
	107	void
	108	icu_definit(void)
	109	{
	110	u_long ef;
	111
	112	KKASSERT(MachIntrABI.type == MACHINTR_ICU);
	113
	114	ef = read_eflags();
	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_eflags(ef);
125	}
126
127	/*
128	* ICU reinitialize when ICU configuration has lost.
129	*/
130	void
131	icu_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	*/
146	intrmask_t
147	icu_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	}