1 /* $NetBSD: psl.h,v 1.15 2012/07/27 05:36:11 matt Exp $ */ 2 3 /* 4 * Copyright (c) 1982, 1986, 1993 5 * The Regents of the University of California. 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. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 * 31 * @(#)psl.h 8.1 (Berkeley) 6/10/93 32 */ 33 34 #ifndef PSL_C 35 /* 36 * MC68000 program status word 37 */ 38 39 #define PSL_C 0x0001 /* carry bit */ 40 #define PSL_V 0x0002 /* overflow bit */ 41 #define PSL_Z 0x0004 /* zero bit */ 42 #define PSL_N 0x0008 /* negative bit */ 43 #define PSL_X 0x0010 /* extend bit */ 44 #define PSL_ALLCC 0x001F /* all cc bits - unlikely */ 45 #define PSL_IPL0 0x0000 /* interrupt priority level 0 */ 46 #define PSL_IPL1 0x0100 /* interrupt priority level 1 */ 47 #define PSL_IPL2 0x0200 /* interrupt priority level 2 */ 48 #define PSL_IPL3 0x0300 /* interrupt priority level 3 */ 49 #define PSL_IPL4 0x0400 /* interrupt priority level 4 */ 50 #define PSL_IPL5 0x0500 /* interrupt priority level 5 */ 51 #define PSL_IPL6 0x0600 /* interrupt priority level 6 */ 52 #define PSL_IPL7 0x0700 /* interrupt priority level 7 */ 53 #define PSL_M 0x1000 /* master (kernel) sp vs intr sp */ 54 #define PSL_S 0x2000 /* supervisor enable bit */ 55 /* PSL_T0 0x4000 ??? T0 on 68020, 8000 is T1 */ 56 #define PSL_T 0x8000 /* trace enable bit */ 57 58 #define PSL_LOWIPL (PSL_S) 59 #define PSL_HIGHIPL (PSL_S | PSL_IPL7) 60 #define PSL_IPL (PSL_IPL7) 61 #define PSL_USER (0) 62 63 #define PSL_MBZ 0xFFFF58E0 /* must be zero bits */ 64 65 #define PSL_USERSET (0) 66 #define PSL_USERCLR (PSL_S | PSL_IPL7 | PSL_MBZ) 67 68 #define USERMODE(ps) (((ps) & PSL_S) == 0) 69 70 #if defined(_KERNEL) && !defined(_LOCORE) 71 72 #define IPL_SAFEPRI PSL_LOWIPL /* for kern_sleepq.c */ 73 74 /* 75 * spl functions; platform-specific code must define spl0 and splx(). 76 */ 77 78 static __inline int 79 _spl(int s) 80 { 81 int sr; 82 83 __asm volatile ("movew %%sr,%0; movew %1,%%sr" : 84 "=&d" (sr) : "di" (s) : "memory"); 85 86 return sr; 87 } 88 89 static __inline int 90 _splraise(int level) 91 { 92 int sr; 93 94 __asm volatile("movw %%sr,%0" : "=d" (sr)); 95 96 if ((u_int16_t)level >= PSL_HIGHIPL || (u_int16_t)level > (u_int16_t)sr) 97 __asm volatile("movw %0,%%sr" :: "di" (level) : "memory"); 98 99 return sr; 100 } 101 102 /* spl0 may require checking for software interrupts */ 103 #define _spl0() _spl(PSL_S|PSL_IPL0) 104 #define spl1() _spl(PSL_S|PSL_IPL1) 105 #define spl2() _spl(PSL_S|PSL_IPL2) 106 #define spl3() _spl(PSL_S|PSL_IPL3) 107 #define spl4() _spl(PSL_S|PSL_IPL4) 108 #define spl5() _spl(PSL_S|PSL_IPL5) 109 #define spl6() _spl(PSL_S|PSL_IPL6) 110 #define spl7() _spl(PSL_S|PSL_IPL7) 111 112 #define splraise1() _splraise(PSL_S|PSL_IPL1) 113 #define splraise2() _splraise(PSL_S|PSL_IPL2) 114 #define splraise3() _splraise(PSL_S|PSL_IPL3) 115 #define splraise4() _splraise(PSL_S|PSL_IPL4) 116 #define splraise5() _splraise(PSL_S|PSL_IPL5) 117 #define splraise6() _splraise(PSL_S|PSL_IPL6) 118 #define splraise7() _splraise(PSL_S|PSL_IPL7) 119 120 #endif /* _KERNEL && ! _LOCORE */ 121 #endif 122