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/* $OpenBSD: intr.c,v 1.2 2007/11/14 20:47:34 thib Exp $ */
/*
* Copyright (c) 1997 Per Fogelstrom, Opsycon AB and RTMX Inc, USA.
*
* 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 under OpenBSD by
* Per Fogelstrom, Opsycon AB, Sweden for RTMX Inc, North Carolina USA.
* 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/param.h>
#include <machine/cpu.h>
#include <machine/intr.h>
int
splraise(int newcpl)
{
struct cpu_info *ci = curcpu();
int oldcpl;
__asm__ volatile("":::"memory"); /* reorder protect */
oldcpl = ci->ci_cpl;
ci->ci_cpl = oldcpl | newcpl;
__asm__ volatile("":::"memory");
return (oldcpl);
}
int
spllower(int newcpl)
{
struct cpu_info *ci = curcpu();
int oldcpl;
__asm__ volatile("":::"memory"); /* reorder protect */
oldcpl = ci->ci_cpl;
ci->ci_cpl = newcpl;
if (ci->ci_ipending & ~newcpl)
do_pending_int();
__asm__ volatile("":::"memory");
return (oldcpl);
}
void
splx(int newcpl)
{
struct cpu_info *ci = curcpu();
__asm__ volatile("":::"memory"); /* reorder protect */
ci->ci_cpl = newcpl;
if (ci->ci_ipending & ~newcpl)
do_pending_int();
__asm__ volatile("":::"memory");
}
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