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Annotation of 43BSDReno/sys/tahoe/psl.h, revision 1.1

1.1     ! root        1: /*
        !             2:  *     @(#)psl.h       7.1 (Berkeley) 5/21/88
        !             3:  */
        !             4: 
        !             5: /*
        !             6:  * TAHOE processor status longword.
        !             7:  */
        !             8: #define        PSL_C           0x00000001      /* carry bit */
        !             9: #define        PSL_V           0x00000002      /* overflow bit */
        !            10: #define        PSL_Z           0x00000004      /* zero bit */
        !            11: #define        PSL_N           0x00000008      /* negative bit */
        !            12: #define        PSL_ALLCC       0x0000000f      /* all cc bits - unlikely */
        !            13: #define        PSL_T           0x00000010      /* trace enable bit */
        !            14: #define        PSL_IV          0x00000020      /* integer overflow enable bit */
        !            15: #define        PSL_FU          0x00000040      /* float underflow enable       */
        !            16: #define PSL_DBL                0x00000080      /* f.p. prescision indicator    */
        !            17: #define        PSL_SFE         0x00000100      /* system-forced-exception */
        !            18: #define        PSL_IPL         0x001f0000      /* interrupt priority level */
        !            19: #define        PSL_PRVMOD      0x00000000      /* previous mode (kernel mode) */
        !            20: #define        PSL_CURMOD      0x01000000      /* current mode (all on is user) */
        !            21: #define        PSL_IS          0x04000000      /* interrupt stack */
        !            22: #define        PSL_TP          0x40000000      /* trace pending */
        !            23: 
        !            24: #define        PSL_MBZ         0xbae0fe00      /* must be zero bits */
        !            25: 
        !            26: #define        PSL_USERSET     (PSL_CURMOD)
        !            27: #define        PSL_USERCLR     (PSL_IS|PSL_IPL|PSL_MBZ|PSL_SFE|PSL_DBL|PSL_FU)

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