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/* $OpenBSD: intr.h,v 1.14 2006/03/13 19:39:52 brad Exp $ */
/* $NetBSD: intr.h,v 1.9 1998/08/12 06:58:42 scottr Exp $ */
/*
* Copyright (C) 1997 Scott Reynolds
* 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. 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 _MAC68K_INTR_H_
#define _MAC68K_INTR_H_
#ifdef _KERNEL
/*
* spl functions; all but spl0 are done in-line
*/
#define _spl(s) \
({ \
register int _spl_r; \
\
__asm __volatile ("clrl %0; movew sr,%0; movew %1,sr" : \
"=&d" (_spl_r) : "di" (s)); \
_spl_r; \
})
#define _splraise(s) \
({ \
int _spl_r; \
\
__asm __volatile (" \
clrl d0 ; \
movw sr,d0 ; \
movl d0,%0 ; \
andw #0x700,d0 ; \
movw %1,d1 ; \
andw #0x700,d1 ; \
cmpw d0,d1 ; \
jle 1f ; \
movw %1,sr ; \
1:" : \
"=&d" (_spl_r) : \
"di" (s) : \
"d0", "d1"); \
_spl_r; \
})
/*
* splnet must block hardware network interrupts
* splvm must be > spltty
*/
extern u_short mac68k_ttyipl;
extern u_short mac68k_bioipl;
extern u_short mac68k_netipl;
extern u_short mac68k_vmipl;
extern u_short mac68k_audioipl;
extern u_short mac68k_clockipl;
extern u_short mac68k_statclockipl;
/*
* Interrupt "levels". These are a more abstract representation
* of interrupt levels, and do not have the same meaning as m68k
* CPU interrupt levels. They serve two purposes:
*
* - properly order ISRs in the list for that CPU ipl
* - compute CPU PSL values for the spl*() calls.
*/
#define IPL_NONE 0
#define IPL_SOFTNET 1
#define IPL_SOFTCLOCK 1
#define IPL_BIO PSLTOIPL(mac68k_bioipl)
#define IPL_NET PSLTOIPL(mac68k_netipl)
#define IPL_TTY PSLTOIPL(mac68k_ttyipl)
#define IPL_CLOCK PSLTOIPL(mac68k_clockipl)
#define IPL_STATCLOCK PSLTOIPL(mac68k_statclockipl)
#define IPL_HIGH 7
/*
* These should be used for:
* 1) ensuring mutual exclusion (why use processor level?)
* 2) allowing faster devices to take priority
*
* Note that on the Mac, most things are masked at spl1, almost
* everything at spl2, and everything but the panic switch and
* power at spl4.
*/
#define splsoft() _splraise(PSL_S | PSL_IPL1)
#define splsoftclock() splsoft()
#define splsoftnet() splsoft()
#define spltty() _splraise(mac68k_ttyipl)
#define splbio() _splraise(mac68k_bioipl)
#define splnet() _splraise(mac68k_netipl)
#define splvm() _splraise(mac68k_vmipl)
#define splaudio() _splraise(mac68k_audioipl)
#define splclock() _splraise(mac68k_clockipl)
#define splstatclock() _splraise(mac68k_statclockipl)
#define splserial() _splraise(PSL_S | PSL_IPL4)
#define splhigh() _spl(PSL_S | PSL_IPL7)
/* These spl calls are _not_ to be used by machine-independent code. */
#define spladb() splhigh()
#define splzs() splserial()
/* watch out for side effects */
#define splx(s) ((s) & PSL_IPL ? _spl(s) : spl0())
/*
* simulated software interrupt register
*/
extern volatile u_int8_t ssir;
#define SIR_NET 0x01
#define SIR_CLOCK 0x02
#define SIR_SERIAL 0x04
#define SIR_ADB 0x08
#define siron(mask) \
__asm __volatile ( "orb %0,_ssir" : : "i" (mask))
#define siroff(mask) \
__asm __volatile ( "andb %0,_ssir" : : "ir" (~(mask)));
#define setsoftnet() siron(SIR_NET)
#define setsoftclock() siron(SIR_CLOCK)
#define setsoftserial() siron(SIR_SERIAL)
#define setsoftadb() siron(SIR_ADB)
/* intr.c */
void intr_init(void);
void intr_establish(int (*)(void *), void *, int, const char *);
void intr_disestablish(int);
void intr_dispatch(int);
/* locore.s */
int spl0(void);
/*
* Interrupt handler.
* There is no support for shared interrupts at the moment.
*/
#include <sys/evcount.h>
struct intrhand {
int (*ih_fn)(void *);
void *ih_arg;
int ih_ipl;
struct evcount ih_count;
};
#endif /* _KERNEL */
#endif /* _MAC68K_INTR_H_ */
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