123 lines
3.4 KiB
C
123 lines
3.4 KiB
C
/* $NetBSD: isa_machdep.c,v 1.2 1997/11/27 10:19:25 sakamoto Exp $ */
|
|
|
|
/*-
|
|
* Copyright (c) 1993, 1994, 1996, 1997 Charles M. Hannum. All rights reserved.
|
|
* 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.
|
|
*
|
|
* @(#)isa.c 7.2 (Berkeley) 5/13/91
|
|
*/
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/syslog.h>
|
|
#include <sys/device.h>
|
|
|
|
#include <machine/pio.h>
|
|
#include <machine/intr.h>
|
|
|
|
#include <dev/isa/isareg.h>
|
|
#include <dev/isa/isavar.h>
|
|
#include <bebox/isa/isa_machdep.h>
|
|
#include <bebox/isa/icu.h>
|
|
|
|
/*
|
|
* Set up an interrupt handler to start being called.
|
|
* XXX PRONE TO RACE CONDITIONS, UGLY, 'INTERESTING' INSERTION ALGORITHM.
|
|
*/
|
|
void *
|
|
isa_intr_establish(ic, irq, type, level, ih_fun, ih_arg)
|
|
isa_chipset_tag_t ic;
|
|
int irq;
|
|
int type;
|
|
int level;
|
|
int (*ih_fun) __P((void *));
|
|
void *ih_arg;
|
|
{
|
|
return (void *)intr_establish(irq, type, level, ih_fun, ih_arg);
|
|
}
|
|
|
|
/*
|
|
* Deregister an interrupt handler.
|
|
*/
|
|
void
|
|
isa_intr_disestablish(ic, arg)
|
|
isa_chipset_tag_t ic;
|
|
void *arg;
|
|
{
|
|
intr_disestablish(arg);
|
|
}
|
|
|
|
void
|
|
isa_attach_hook(parent, self, iba)
|
|
struct device *parent, *self;
|
|
struct isabus_attach_args *iba;
|
|
{
|
|
}
|
|
|
|
int
|
|
isa_intr()
|
|
{
|
|
int irq;
|
|
|
|
isa_outb(IO_ICU1, 0x0c);
|
|
irq = isa_inb(IO_ICU1) & 0x07;
|
|
if (irq == IRQ_SLAVE) {
|
|
isa_outb(IO_ICU2, 0x0c);
|
|
irq = (isa_inb(IO_ICU2) & 0x07) + 8;
|
|
}
|
|
|
|
return (irq);
|
|
}
|
|
|
|
void
|
|
isa_intr_mask(mask)
|
|
int mask;
|
|
{
|
|
isa_outb(IO_ICU1 + 1, mask);
|
|
isa_outb(IO_ICU2 + 1, mask >> 8);
|
|
}
|
|
|
|
void
|
|
isa_intr_clr(irq)
|
|
int irq;
|
|
{
|
|
if (irq < 8) {
|
|
isa_outb(IO_ICU1, 0xe0|irq);
|
|
} else {
|
|
isa_outb(IO_ICU2, 0xe0|(irq - 8));
|
|
isa_outb(IO_ICU1, 0xe0|IRQ_SLAVE);
|
|
}
|
|
}
|