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/* $OpenBSD: intr.h,v 1.1 1997/10/13 10:53:45 pefo 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.
*
*/
#ifndef _MACHINE_INTR_H_
#define _MACHINE_INTR_H_
#define IPL_BIO 0
#define IPL_NET 1
#define IPL_TTY 2
#define IPL_IMP 3
#define IPL_CLOCK 4
#define IPL_NONE 5
#define IPL_HIGH 6
#define IST_NONE 0
#define IST_PULSE 1
#define IST_EDGE 2
#define IST_LEVEL 3
#ifndef _LOCORE
void setsoftclock __P((void));
void clearsoftclock __P((void));
int splsoftclock __P((void));
void setsoftnet __P((void));
void clearsoftnet __P((void));
int splsoftnet __P((void));
void do_pending_int __P((void));
volatile int cpl, ipending, astpending, tickspending;
int imask[7];
/*
* Reorder protection in the following inline functions is
* achived with the "eieio" instruction which the assembler
* seems to detect and then doen't move instructions past....
*/
static __inline int
splraise(newcpl)
int newcpl;
{
int oldcpl;
__asm__ volatile("sync; eieio\n"); /* don't reorder.... */
oldcpl = cpl;
cpl = oldcpl | newcpl;
__asm__ volatile("sync; eieio\n"); /* reorder protect */
return(oldcpl);
}
static __inline void
splx(newcpl)
int newcpl;
{
__asm__ volatile("sync; eieio\n"); /* reorder protect */
cpl = newcpl;
if(ipending & ~newcpl)
do_pending_int();
__asm__ volatile("sync; eieio\n"); /* reorder protect */
}
static __inline int
spllower(newcpl)
int newcpl;
{
int oldcpl;
__asm__ volatile("sync; eieio\n"); /* reorder protect */
oldcpl = cpl;
cpl = newcpl;
if(ipending & ~newcpl)
do_pending_int();
__asm__ volatile("sync; eieio\n"); /* reorder protect */
return(oldcpl);
}
/* Following code should be implemented with lwarx/stwcx to avoid
* the disable/enable. i need to read the manual once more.... */
static __inline void
set_sint(pending)
int pending;
{
int msrsave;
__asm__ ("mfmsr %0" : "=r"(msrsave));
__asm__ volatile ("mtmsr %0" :: "r"(msrsave & ~PSL_EE));
ipending |= pending;
__asm__ volatile ("mtmsr %0" :: "r"(msrsave));
}
#define SINT_CLOCK 0x10000000
#define SINT_NET 0x20000000
#define SINT_TTY 0x40000000
#define SPL_CLOCK 0x80000000
#define SINT_MASK (SINT_CLOCK|SINT_NET|SINT_TTY)
#define splbio() splraise(imask[IPL_BIO])
#define splnet() splraise(imask[IPL_NET])
#define spltty() splraise(imask[IPL_TTY])
#define splclock() splraise(SPL_CLOCK|SINT_CLOCK|SINT_NET)
#define splimp() splraise(imask[IPL_IMP])
#define splstatclock() splhigh()
#define splsoftclock() spllower(SINT_CLOCK)
#define splsoftnet() splraise(SINT_NET)
#define splsofttty() splraise(SINT_TTY)
#define setsoftclock() set_sint(SINT_CLOCK);
#define setsoftnet() set_sint(SINT_NET);
#define setsofttty() set_sint(SINT_TTY);
#define splhigh() splraise(0xffffffff)
#define spl0() spllower(0)
#endif /* _LOCORE */
#endif /* _MACHINE_INTR_H_ */
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