115 lines
3.9 KiB
C
115 lines
3.9 KiB
C
/* $NetBSD: psl.h,v 1.6 1995/03/27 01:22:52 gwr Exp $ */
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/*
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* Copyright (c) 1995 Gordon W. Ross
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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. 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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* 4. 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 Gordon Ross
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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 PSL_C
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#include <m68k/psl.h>
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/* Could define this in the common <m68k/psl.h> instead. */
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#if defined(_KERNEL) && !defined(LOCORE)
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#ifndef __GNUC__
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/* No inline, use real function in locore.s */
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extern int _spl(int new);
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#else /* GNUC */
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/*
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* Define an inline function for PSL manipulation.
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* This is as close to a macro as one can get.
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* If not optimizing, the one in locore.s is used.
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* (See the GCC extensions info document.)
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*/
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extern __inline__ int _spl(int new)
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{
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register int old;
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/*
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* Get the old sr value.
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* Not volatile so the optimizer can toss it if
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* the return value of this inline is not used.
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*/
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__asm ("clrl %0; movw sr,%0" : "=d" (old));
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/*
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* Set the new sr value (status register).
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* The volatile qualifier prevents the optimizer
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* from assuming this statement has no effect.
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*/
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__asm __volatile ("movw %0,sr" : : "di" (new));
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return (old);
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}
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#endif /* GNUC */
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/*
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* The rest of this is sun3 specific, because other ports may
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* need to do special things in spl0() (i.e. simulate SIR).
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* Suns have a REAL interrupt register, so spl0() and splx(s)
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* have no need to check for any simulated interrupts, etc.
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*/
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#define spl0() _spl(PSL_S|PSL_IPL0)
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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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#define splx(x) _spl(x)
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/* IPL used by soft interrupts: netintr(), softclock() */
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#define splsoftclock() spl1()
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/* Highest block device (strategy) IPL. */
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#define splbio() spl2()
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/* Highest network interface IPL. */
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#define splnet() spl3()
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/* Highest tty device IPL. */
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#define spltty() spl4()
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/* Requirement: imp >= (highest network, tty, or disk IPL) */
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#define splimp() spl4()
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/* Intersil clock hardware interrupts (hard-wired at 5) */
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#define splclock() spl5()
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#define splstatclock() splclock()
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/* Zilog Serial hardware interrupts (hard-wired at 6) */
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#define splzs() spl6()
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/* Block out all interrupts (except NMI of course). */
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#define splhigh() spl7()
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#define splsched() spl7()
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#endif /* KERNEL && !LOCORE */
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#endif /* PSL_C */
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