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psl.h revision 1.9 
      1 /*	$NetBSD: psl.h,v 1.9 1996/02/01 22:33:10 mycroft Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1995 Gordon W. Ross
      5  * All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  * 3. The name of the author may not be used to endorse or promote products
     16  *    derived from this software without specific prior written permission.
     17  * 4. All advertising materials mentioning features or use of this software
     18  *    must display the following acknowledgement:
     19  *      This product includes software developed by Gordon Ross
     20  *
     21  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     22  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     23  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     24  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     25  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     26  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     27  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     28  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     29  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     30  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     31  */
     32 
     33 #ifndef	PSL_C
     34 #include <m68k/psl.h>
     35 
     36 /* Could define this in the common <m68k/psl.h> instead. */
     37 
     38 #if defined(_KERNEL) && !defined(_LOCORE)
     39 
     40 #ifndef __GNUC__
     41 /* No inline, use real function in locore.s */
     42 extern int _spl(int new);
     43 #else	/* GNUC */
     44 /*
     45  * Define an inline function for PSL manipulation.
     46  * This is as close to a macro as one can get.
     47  * If not optimizing, the one in locore.s is used.
     48  * (See the GCC extensions info document.)
     49  */
     50 extern __inline__ int _spl(int new)
     51 {
     52 	register int old;
     53 
     54 	__asm __volatile (
     55 		"clrl %0; movew sr,%0; movew %1,sr" :
     56 			"&=d" (old) : "di" (new));
     57 	return (old);
     58 }
     59 #endif	/* GNUC */
     60 
     61 /*
     62  * The rest of this is sun3 specific, because other ports may
     63  * need to do special things in spl0() (i.e. simulate SIR).
     64  * Suns have a REAL interrupt register, so spl0() and splx(s)
     65  * have no need to check for any simulated interrupts, etc.
     66  */
     67 
     68 #define spl0()  _spl(PSL_S|PSL_IPL0)
     69 #define spl1()  _spl(PSL_S|PSL_IPL1)
     70 #define spl2()  _spl(PSL_S|PSL_IPL2)
     71 #define spl3()  _spl(PSL_S|PSL_IPL3)
     72 #define spl4()  _spl(PSL_S|PSL_IPL4)
     73 #define spl5()  _spl(PSL_S|PSL_IPL5)
     74 #define spl6()  _spl(PSL_S|PSL_IPL6)
     75 #define spl7()  _spl(PSL_S|PSL_IPL7)
     76 #define splx(x)	_spl(x)
     77 
     78 /* IPL used by soft interrupts: netintr(), softclock() */
     79 #define splsoftclock()  spl1()
     80 #define splsoftnet()    spl1()
     81 
     82 /* Highest block device (strategy) IPL. */
     83 #define splbio()        spl2()
     84 
     85 /* Highest network interface IPL. */
     86 #define splnet()        spl3()
     87 
     88 /* Highest tty device IPL. */
     89 #define spltty()        spl4()
     90 
     91 /* Requirement: imp >= (highest network, tty, or disk IPL) */
     92 #define splimp()        spl4()
     93 
     94 /* Intersil clock hardware interrupts (hard-wired at 5) */
     95 #define splclock()      spl5()
     96 #define splstatclock()  splclock()
     97 
     98 /* Zilog Serial hardware interrupts (hard-wired at 6) */
     99 #define splzs()         spl6()
    100 
    101 /* Block out all interrupts (except NMI of course). */
    102 #define splhigh()       spl7()
    103 #define splsched()      spl7()
    104 
    105 #endif	/* KERNEL && !_LOCORE */
    106 #endif	/* PSL_C */
    107