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/* $OpenBSD: isa_machdep.c,v 1.4 1999/03/05 19:17:44 niklas Exp $ */
/*
* Copyright (c) 1999 Niklas Hallqvist
* All rights reserved.
*
* 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 Niklas Hallqvist.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
*/
#include <sys/types.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <machine/intr.h>
#include <dev/isa/isareg.h>
#include <dev/isa/isavar.h>
/*
* Just check to see if an IRQ is available/can be shared.
* 0 = interrupt not available
* 1 = interrupt shareable
* 2 = interrupt all to ourself
*/
int
__isa_intr_check(irq, type, intrtype)
int irq;
int type;
int *intrtype;
{
if (type == IST_NONE)
return (0);
switch (intrtype[irq]) {
case IST_NONE:
return (2);
break;
case IST_LEVEL:
if (type != intrtype[irq])
return (0);
return (1);
break;
case IST_EDGE:
case IST_PULSE:
if (type != IST_NONE)
return (0);
}
return (1);
}
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