NetBSD/sys/arch/sh3/include/intr.h

193 lines
5.3 KiB
C

/* $NetBSD: intr.h,v 1.4 2000/02/24 19:01:24 msaitoh Exp $ */
/*
* Copyright (c) 1996, 1997 Charles M. Hannum. 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 Charles M. Hannum.
* 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.
*/
/*
* SH3 Version
*
* T.Horiuchi Brains Corp. 5/22/98
*/
#ifndef _SH3_INTR_H_
#define _SH3_INTR_H_
/* Interrupt priority `levels'. */
#define IPL_NONE 9 /* nothing */
#define IPL_SOFTCLOCK 8 /* timeouts */
#define IPL_SOFTNET 7 /* protocol stacks */
#define IPL_BIO 6 /* block I/O */
#define IPL_NET 5 /* network */
#define IPL_SOFTSERIAL 4 /* serial */
#define IPL_TTY 3 /* terminal */
#define IPL_IMP 3 /* memory allocation */
#define IPL_AUDIO 2 /* audio */
#define IPL_CLOCK 1 /* clock */
#define IPL_HIGH 1 /* everything */
#define IPL_SERIAL 0 /* serial */
#define NIPL 10
/* Interrupt sharing types. */
#define IST_NONE 0 /* none */
#define IST_PULSE 1 /* pulsed */
#define IST_EDGE 2 /* edge-triggered */
#define IST_LEVEL 3 /* level-triggered */
#ifndef _LOCORE
volatile int cpl, ipending, astpending;
int imask[NIPL];
extern void Xspllower __P((void));
static __inline int splraise __P((int));
static __inline int spllower __P((int));
static __inline void splx __P((int));
static __inline void softintr __P((int));
/*
* Add a mask to cpl, and return the old value of cpl.
*/
static __inline int
splraise(ncpl)
register int ncpl;
{
int ocpl ;
ocpl = cpl;
cpl = ocpl | ncpl;
return (ocpl);
}
/*
* Restore a value to cpl (unmasking interrupts). If any unmasked
* interrupts are pending, call Xspllower() to process them.
*/
static __inline void
splx(ncpl)
register int ncpl;
{
cpl = ncpl;
if (ipending & ~ncpl)
Xspllower();
}
/*
* Same as splx(), but we return the old value of spl, for the
* benefit of some splsoftclock() callers.
*/
static __inline int
spllower(ncpl)
register int ncpl;
{
register int ocpl = cpl;
cpl = ncpl;
if (ipending & ~ncpl)
Xspllower();
return (ocpl);
}
/*
* Hardware interrupt masks
*/
#define splbio() splraise(imask[IPL_BIO])
#define splnet() splraise(imask[IPL_NET])
#define spltty() splraise(imask[IPL_TTY])
#define splaudio() splraise(imask[IPL_AUDIO])
#define splclock() splraise(imask[IPL_CLOCK])
#define splstatclock() splclock()
#define splserial() splraise(imask[IPL_SERIAL])
/*
* Software interrupt masks
*
* NOTE: splsoftclock() is used by hardclock() to lower the priority from
* clock to softclock before it calls softclock().
*/
#define spllowersoftclock() spllower(imask[IPL_SOFTCLOCK])
#define splsoftclock() splraise(imask[IPL_SOFTCLOCK])
#define splsoftnet() splraise(imask[IPL_SOFTNET])
#define splsoftserial() splraise(imask[IPL_SOFTSERIAL])
/*
* Miscellaneous
*/
#define splimp() splraise(imask[IPL_IMP])
#define splhigh() splraise(imask[IPL_HIGH])
#define spl0() spllower(0)
/*
* Software interrupt registration
*
* We hand-code this to ensure that it's atomic.
*/
static __inline void
softintr(mask)
register int mask;
{
extern void enable_interrupt(void); /* XXX */
extern void disable_interrupt(void);
disable_interrupt();
ipending |= (1 << mask);
enable_interrupt();
}
#define setsoftast() (astpending = 1)
#define setsoftclock() softintr(SIR_CLOCK)
#define setsoftnet() softintr(SIR_NET)
#define setsoftserial() softintr(SIR_SERIAL)
#endif /* !_LOCORE */
#define INTEVT_SOFT 0xf00 /* This value is stored to INTEVT reg,
when software interrupt occured */
#define INTEVT_TMU0 0x400
#define INTEVT_TMU1 0x420
#define INTEVT_TMU2 0x440
#define INTEVT_SCI0_ERI 0x4e0
#define INTEVT_SCI0_RXI 0x500
#define INTEVT_SCI0_TXI 0x520
#define INTEVT_SCI0_TEI 0x540
#define IS_INTEVT_SCI0(x) ((x == INTEVT_SCI0_ERI) || (x == INTEVT_SCI0_RXI) \
|| (x == INTEVT_SCI0_TXI) || (x == INTEVT_SCI0_TEI))
#define INTEVT_PRI 0x4a0 /* Periodic interrupt generated by RTC */
#if defined(SH4)
#define INTEVT_SCIF 0x700
#endif
#endif /* !_SH3_INTR_H_ */