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Annotation of Net2/arch/amiga/include/psl.h, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1982, 1986 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:  *     @(#)psl.h       7.2 (Berkeley) 5/4/91
        !            34:  */
        !            35: 
        !            36: #ifndef PSL_C
        !            37: /*
        !            38:  * MC68000 program status word
        !            39:  */
        !            40: 
        !            41: #define        PSL_C           0x0001          /* carry bit */
        !            42: #define        PSL_V           0x0002          /* overflow bit */
        !            43: #define        PSL_Z           0x0004          /* zero bit */
        !            44: #define        PSL_N           0x0008          /* negative bit */
        !            45: #define        PSL_X           0x0010          /* extend bit */
        !            46: #define        PSL_ALLCC       0x001F          /* all cc bits - unlikely */
        !            47: #define        PSL_IPL0        0x0000          /* interrupt priority level 0 */
        !            48: #define        PSL_IPL1        0x0100          /* interrupt priority level 1 */
        !            49: #define        PSL_IPL2        0x0200          /* interrupt priority level 2 */
        !            50: #define        PSL_IPL3        0x0300          /* interrupt priority level 3 */
        !            51: #define        PSL_IPL4        0x0400          /* interrupt priority level 4 */
        !            52: #define        PSL_IPL5        0x0500          /* interrupt priority level 5 */
        !            53: #define        PSL_IPL6        0x0600          /* interrupt priority level 6 */
        !            54: #define        PSL_IPL7        0x0700          /* interrupt priority level 7 */
        !            55: #define        PSL_S           0x2000          /* supervisor enable bit */
        !            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         0x58E0          /* must be zero bits */
        !            64: 
        !            65: #define        PSL_USERSET     (0)
        !            66: #define        PSL_USERCLR     (PSL_S | PSL_IPL7 | PSL_MBZ)
        !            67: 
        !            68: /*
        !            69:  * Macros to decode processor status word.
        !            70:  */
        !            71: #define        USERMODE(ps)    (((ps) & PSL_S) == 0)
        !            72: #define        BASEPRI(ps)     (((ps) & PSL_IPL7) == 0)
        !            73: #endif

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