1 /* $NetBSD: psl.h,v 1.9 2001/08/05 04:40:03 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. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 * 35 * @(#)psl.h 8.1 (Berkeley) 6/10/93 36 */ 37 38 #ifndef PSL_C 39 /* 40 * MC68000 program status word 41 */ 42 43 #define PSL_C 0x0001 /* carry bit */ 44 #define PSL_V 0x0002 /* overflow bit */ 45 #define PSL_Z 0x0004 /* zero bit */ 46 #define PSL_N 0x0008 /* negative bit */ 47 #define PSL_X 0x0010 /* extend bit */ 48 #define PSL_ALLCC 0x001F /* all cc bits - unlikely */ 49 #define PSL_IPL0 0x0000 /* interrupt priority level 0 */ 50 #define PSL_IPL1 0x0100 /* interrupt priority level 1 */ 51 #define PSL_IPL2 0x0200 /* interrupt priority level 2 */ 52 #define PSL_IPL3 0x0300 /* interrupt priority level 3 */ 53 #define PSL_IPL4 0x0400 /* interrupt priority level 4 */ 54 #define PSL_IPL5 0x0500 /* interrupt priority level 5 */ 55 #define PSL_IPL6 0x0600 /* interrupt priority level 6 */ 56 #define PSL_IPL7 0x0700 /* interrupt priority level 7 */ 57 #define PSL_M 0x1000 /* master (kernel) sp vs intr sp */ 58 #define PSL_S 0x2000 /* supervisor enable bit */ 59 /* PSL_T0 0x4000 ??? T0 on 68020, 8000 is T1 */ 60 #define PSL_T 0x8000 /* trace enable bit */ 61 62 #define PSL_LOWIPL (PSL_S) 63 #define PSL_HIGHIPL (PSL_S | PSL_IPL7) 64 #define PSL_IPL (PSL_IPL7) 65 #define PSL_USER (0) 66 67 #define PSL_MBZ 0xFFFF58E0 /* must be zero bits */ 68 69 #define PSL_USERSET (0) 70 #define PSL_USERCLR (PSL_S | PSL_IPL7 | PSL_MBZ) 71 72 #define USERMODE(ps) (((ps) & PSL_S) == 0) 73 74 #if defined(_KERNEL) && !defined(_LOCORE) 75 76 /* 77 * spl functions; platform-specific code must define spl0 and splx(). 78 */ 79 80 static __inline int 81 _spl(int s) 82 { 83 int sr; 84 85 __asm __volatile ("movew %%sr,%0; movew %1,%%sr" : 86 "=&d" (sr) : "di" (s)); 87 88 return sr; 89 } 90 91 static __inline int 92 _splraise(int level) 93 { 94 int sr; 95 96 __asm __volatile("movw %%sr,%0" : "=d" (sr)); 97 98 if ((u_int16_t)level >= PSL_HIGHIPL || (u_int16_t)level > (u_int16_t)sr) 99 __asm __volatile("movw %0,%%sr" :: "di" (level)); 100 101 return sr; 102 } 103 104 /* spl0 may require checking for software interrupts */ 105 #define _spl0() _spl(PSL_S|PSL_IPL0) 106 #define spl1() _spl(PSL_S|PSL_IPL1) 107 #define spl2() _spl(PSL_S|PSL_IPL2) 108 #define spl3() _spl(PSL_S|PSL_IPL3) 109 #define spl4() _spl(PSL_S|PSL_IPL4) 110 #define spl5() _spl(PSL_S|PSL_IPL5) 111 #define spl6() _spl(PSL_S|PSL_IPL6) 112 #define spl7() _spl(PSL_S|PSL_IPL7) 113 114 #define splraise1() _splraise(PSL_S|PSL_IPL1) 115 #define splraise2() _splraise(PSL_S|PSL_IPL2) 116 #define splraise3() _splraise(PSL_S|PSL_IPL3) 117 #define splraise4() _splraise(PSL_S|PSL_IPL4) 118 #define splraise5() _splraise(PSL_S|PSL_IPL5) 119 #define splraise6() _splraise(PSL_S|PSL_IPL6) 120 #define splraise7() _splraise(PSL_S|PSL_IPL7) 121 122 #endif /* _KERNEL && ! _LOCORE */ 123 #endif 124