116 lines
3.9 KiB
C
116 lines
3.9 KiB
C
/* $NetBSD: psl.h,v 1.7 1995/08/13 00:31:28 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;
|
|
|
|
/*
|
|
* Get the old sr value.
|
|
* Not volatile so the optimizer can toss it if
|
|
* the return value of this inline is not used.
|
|
*/
|
|
__asm ("clrl %0; movw sr,%0" : "=d" (old));
|
|
/*
|
|
* Set the new sr value (status register).
|
|
* The volatile qualifier prevents the optimizer
|
|
* from assuming this statement has no effect.
|
|
*/
|
|
__asm __volatile ("movw %0,sr" : : "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 */
|