1 /* $NetBSD: psl.h,v 1.2 2001/06/27 02:51:45 fredette 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 _SUN68K_PSL_H_ 40 #define _SUN68K_PSL_H_ 41 42 #include <m68k/psl.h> 43 44 /* Could define this in the common <m68k/psl.h> instead. */ 45 46 #if defined(_KERNEL) && !defined(_LOCORE) 47 48 /* 49 * Define inline functions for PSL manipulation. 50 * These are as close to macros as one can get. 51 * When not optimizing gcc will call the locore.s 52 * functions by the same names, so breakpoints on 53 * these functions will work normally, etc. 54 * (See the GCC extensions info document.) 55 */ 56 57 static __inline int _getsr __P((void)); 58 59 /* Get current sr value. */ 60 static __inline int 61 _getsr(void) 62 { 63 register int rv; 64 65 __asm __volatile ("clrl %0; movew %%sr,%0" : "=&d" (rv)); 66 return (rv); 67 } 68 69 /* 70 * The rest of this is sun68k specific, because other ports may 71 * need to do special things in spl0() (i.e. simulate SIR). 72 * Suns have a REAL interrupt register, so spl0() and splx(s) 73 * have no need to check for any simulated interrupts, etc. 74 */ 75 76 #define spl0() _spl0() /* we have real software interrupts */ 77 #define splx(x) _spl(x) 78 79 /* IPL used by soft interrupts: netintr(), softclock() */ 80 #define spllowersoftclock() spl1() 81 #define splsoftclock() splraise1() 82 #define splsoftnet() splraise1() 83 84 /* Highest block device (strategy) IPL. */ 85 #define splbio() splraise2() 86 87 /* Highest network interface IPL. */ 88 #define splnet() splraise3() 89 90 /* Highest tty device IPL. */ 91 #define spltty() splraise4() 92 93 /* 94 * Requirement: imp >= (highest network, tty, or disk IPL) 95 * This is used mostly in the VM code. 96 * Note that the VM code runs at spl7 during kernel 97 * initialization, and later at spl0, so we have to 98 * use splraise to avoid enabling interrupts early. 99 */ 100 #define splvm() _splraise(PSL_S|PSL_IPL4) 101 102 /* Intersil or Am9513 clock hardware interrupts (hard-wired at 5) */ 103 #define splclock() splraise5() 104 #define splstatclock() splclock() 105 106 /* Zilog Serial hardware interrupts (hard-wired at 6) */ 107 #define splzs() spl6() 108 109 /* Block out all interrupts (except NMI of course). */ 110 #define splhigh() spl7() 111 #define splsched() spl7() 112 #define spllock() spl7() 113 114 /* This returns true iff the spl given is spl0. */ 115 #define is_spl0(s) (((s) & PSL_IPL7) == 0) 116 117 #endif /* KERNEL && !_LOCORE */ 118 #endif /* _SUN68K_PSL_H_ */ 119