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psl.h revision 1.1 
      1 /*
      2  * Copyright (c) 1990 The Regents of the University of California.
      3  * All rights reserved.
      4  *
      5  * Redistribution and use in source and binary forms, with or without
      6  * modification, are permitted provided that the following conditions
      7  * are met:
      8  * 1. Redistributions of source code must retain the above copyright
      9  *    notice, this list of conditions and the following disclaimer.
     10  * 2. Redistributions in binary form must reproduce the above copyright
     11  *    notice, this list of conditions and the following disclaimer in the
     12  *    documentation and/or other materials provided with the distribution.
     13  * 3. All advertising materials mentioning features or use of this software
     14  *    must display the following acknowledgement:
     15  *	This product includes software developed by the University of
     16  *	California, Berkeley and its contributors.
     17  * 4. Neither the name of the University nor the names of its contributors
     18  *    may be used to endorse or promote products derived from this software
     19  *    without specific prior written permission.
     20  *
     21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     31  * SUCH DAMAGE.
     32 */
     33 #ident "$Id: psl.h,v 1.1 1993/09/29 06:09:20 briggs Exp $"
     34 /*
     35  *	@(#)psl.h	7.2 (Berkeley) 5/4/91
     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_S		0x2000		/* supervisor enable bit */
     58 #define	PSL_T		0x8000		/* trace enable bit */
     59 
     60 #define	PSL_LOWIPL	(PSL_S)
     61 #define	PSL_HIGHIPL	(PSL_S | PSL_IPL7)
     62 #define PSL_IPL		(PSL_IPL7)
     63 #define	PSL_USER	(0)
     64 
     65 #define	PSL_MBZ		0x58E0		/* must be zero bits */
     66 
     67 #define	PSL_USERSET	(0)
     68 #define	PSL_USERCLR	(PSL_S | PSL_IPL7 | PSL_MBZ)
     69 
     70 /*
     71  * Macros to decode processor status word.
     72  */
     73 #define	USERMODE(ps)	(((ps) & PSL_S) == 0)
     74 #define	BASEPRI(ps)	(((ps) & PSL_IPL7) == 0)
     75 #endif
     76