1 /* $NetBSD: psl.h,v 1.12 1997/01/27 19:41:07 gwr Exp $ */ 2 3 /*- 4 * Copyright (c) 1996 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Gordon W. Ross. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 #ifndef PSL_C 40 #include <m68k/psl.h> 41 42 /* Could define this in the common <m68k/psl.h> instead. */ 43 44 #if defined(_KERNEL) && !defined(_LOCORE) 45 46 #ifndef __GNUC__ 47 /* No inline, use real function in locore.s */ 48 extern int _spl(int new); 49 #else /* GNUC */ 50 /* 51 * Define an inline function for PSL manipulation. 52 * This is as close to a macro as one can get. 53 * If not optimizing, the one in locore.s is used. 54 * (See the GCC extensions info document.) 55 */ 56 extern __inline__ int _spl(int new) 57 { 58 register int old; 59 60 __asm __volatile ( 61 "clrl %0; movew sr,%0; movew %1,sr" : 62 "&=d" (old) : "di" (new)); 63 return (old); 64 } 65 #endif /* GNUC */ 66 67 /* 68 * The rest of this is sun3 specific, because other ports may 69 * need to do special things in spl0() (i.e. simulate SIR). 70 * Suns have a REAL interrupt register, so spl0() and splx(s) 71 * have no need to check for any simulated interrupts, etc. 72 */ 73 74 #define spl0() _spl(PSL_S|PSL_IPL0) 75 #define spl1() _spl(PSL_S|PSL_IPL1) 76 #define spl2() _spl(PSL_S|PSL_IPL2) 77 #define spl3() _spl(PSL_S|PSL_IPL3) 78 #define spl4() _spl(PSL_S|PSL_IPL4) 79 #define spl5() _spl(PSL_S|PSL_IPL5) 80 #define spl6() _spl(PSL_S|PSL_IPL6) 81 #define spl7() _spl(PSL_S|PSL_IPL7) 82 #define splx(x) _spl(x) 83 84 /* IPL used by soft interrupts: netintr(), softclock() */ 85 #define splsoftclock() spl1() 86 #define splsoftnet() spl1() 87 88 /* Highest block device (strategy) IPL. */ 89 #define splbio() spl2() 90 91 /* Highest network interface IPL. */ 92 #define splnet() spl3() 93 94 /* Highest tty device IPL. */ 95 #define spltty() spl4() 96 97 /* Requirement: imp >= (highest network, tty, or disk IPL) */ 98 #define splimp() spl4() 99 100 /* Intersil clock hardware interrupts (hard-wired at 5) */ 101 #define splclock() spl5() 102 #define splstatclock() splclock() 103 104 /* Block out all interrupts (except NMI of course). */ 105 #define splhigh() spl7() 106 #define splsched() spl7() 107 108 /* Get current sr value (debug, etc.) */ 109 extern int getsr __P((void)); 110 111 #endif /* KERNEL && !_LOCORE */ 112 #endif /* PSL_C */ 113