NetBSD/sys/arch/bebox/isa/isa_machdep.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);
}
}