120 lines
4.2 KiB
C
120 lines
4.2 KiB
C
/* $NetBSD: intr.h,v 1.3 1997/05/12 07:29:29 scottr Exp $ */
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/*
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* Copyright (C) 1997 Scott Reynolds
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Scott Reynolds for
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* the NetBSD Project.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _MAC68K_INTR_H_
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#define _MAC68K_INTR_H_
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#ifdef _KERNEL
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/*
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* spl functions; all but spl0 are done in-line
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*/
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#define _spl(s) \
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({ \
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register int _spl_r; \
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\
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__asm __volatile ("clrl %0; movew sr,%0; movew %1,sr" : \
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"&=d" (_spl_r) : "di" (s)); \
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_spl_r; \
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})
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#define _splraise(s) \
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({ \
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register int _spl_r; \
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\
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__asm __volatile ("clrl %0; movew sr,%0;" : "&=d" (_spl_r) : ); \
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if ((_spl_r & PSL_IPL) < ((s) & PSL_IPL)) \
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__asm __volatile ("movew %0,sr;" : : "di" (s)); \
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_spl_r; \
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})
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/* spl0 requires checking for software interrupts */
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#define spl1() _spl(PSL_S|PSL_IPL1)
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#define spl2() _spl(PSL_S|PSL_IPL2)
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#define spl3() _spl(PSL_S|PSL_IPL3)
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#define spl4() _spl(PSL_S|PSL_IPL4)
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#define spl5() _spl(PSL_S|PSL_IPL5)
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#define spl6() _spl(PSL_S|PSL_IPL6)
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#define spl7() _spl(PSL_S|PSL_IPL7)
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/*
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* These should be used for:
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* 1) ensuring mutual exclusion (why use processor level?)
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* 2) allowing faster devices to take priority
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*
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* Note that on the Mac, most things are masked at spl1, almost
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* everything at spl2, and everything but the panic switch and
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* power at spl4.
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*/
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#define splsoftclock() spl1() /* disallow softclock */
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#define splsoftnet() spl1() /* disallow network */
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#define spltty() spl1() /* disallow tty (softserial & ADB) */
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#define splbio() spl2() /* disallow block I/O */
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#define splnet() spl2() /* disallow network */
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#define splimp() spl2() /* mutual exclusion for memory allocation */
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#define splclock() spl2() /* disallow clock (and other) interrupts */
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#define splstatclock() spl2() /* ditto */
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#define splzs() spl4() /* disallow serial hw interrupts */
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#define spladb() spl7() /* disallow adb interrupts */
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#define splhigh() spl7() /* disallow everything */
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#define splsched() spl7() /* disallow scheduling */
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/* watch out for side effects */
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#define splx(s) ((s) & PSL_IPL ? _spl(s) : spl0())
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/*
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* simulated software interrupt register
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*/
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extern volatile u_int8_t ssir;
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#define SIR_NET 0x01
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#define SIR_CLOCK 0x02
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#define SIR_SERIAL 0x04
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#define SIR_DTMGR 0x08
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#define siron(mask) \
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__asm __volatile ( "orb %0,_ssir" : : "i" (mask))
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#define siroff(mask) \
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__asm __volatile ( "andb %0,_ssir" : : "ir" (~(mask)));
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#define setsoftnet() siron(SIR_NET)
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#define setsoftclock() siron(SIR_CLOCK)
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#define setsoftserial() siron(SIR_SERIAL)
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#define setsoftdtmgr() siron(SIR_DTMGR)
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/* locore.s */
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int spl0 __P((void));
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#endif /* _KERNEL */
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#endif /* _MAC68K_INTR_H_ */
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