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/* $NetBSD: psl.h,v 1.9 1996/02/01 22:33:10 mycroft Exp $ */
/*
* Copyright (c) 1995 Gordon W. Ross
* 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.
* 4. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Gordon Ross
*
* 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 PSL_C
#include <m68k/psl.h>
/* Could define this in the common <m68k/psl.h> instead. */
#if defined(_KERNEL) && !defined(_LOCORE)
#ifndef __GNUC__
/* No inline, use real function in locore.s */
extern int _spl(int new);
#else /* GNUC */
/*
* Define an inline function for PSL manipulation.
* This is as close to a macro as one can get.
* If not optimizing, the one in locore.s is used.
* (See the GCC extensions info document.)
*/
extern __inline__ int _spl(int new)
{
register int old;
__asm __volatile (
"clrl %0; movew sr,%0; movew %1,sr" :
"&=d" (old) : "di" (new));
return (old);
}
#endif /* GNUC */
/*
* The rest of this is sun3 specific, because other ports may
* need to do special things in spl0() (i.e. simulate SIR).
* Suns have a REAL interrupt register, so spl0() and splx(s)
* have no need to check for any simulated interrupts, etc.
*/
#define spl0() _spl(PSL_S|PSL_IPL0)
#define spl1() _spl(PSL_S|PSL_IPL1)
#define spl2() _spl(PSL_S|PSL_IPL2)
#define spl3() _spl(PSL_S|PSL_IPL3)
#define spl4() _spl(PSL_S|PSL_IPL4)
#define spl5() _spl(PSL_S|PSL_IPL5)
#define spl6() _spl(PSL_S|PSL_IPL6)
#define spl7() _spl(PSL_S|PSL_IPL7)
#define splx(x) _spl(x)
/* IPL used by soft interrupts: netintr(), softclock() */
#define splsoftclock() spl1()
#define splsoftnet() spl1()
/* Highest block device (strategy) IPL. */
#define splbio() spl2()
/* Highest network interface IPL. */
#define splnet() spl3()
/* Highest tty device IPL. */
#define spltty() spl4()
/* Requirement: imp >= (highest network, tty, or disk IPL) */
#define splimp() spl4()
/* Intersil clock hardware interrupts (hard-wired at 5) */
#define splclock() spl5()
#define splstatclock() splclock()
/* Zilog Serial hardware interrupts (hard-wired at 6) */
#define splzs() spl6()
/* Block out all interrupts (except NMI of course). */
#define splhigh() spl7()
#define splsched() spl7()
#endif /* KERNEL && !_LOCORE */
#endif /* PSL_C */
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