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Annotation of 43BSDTahoe/sys/tahoe/psl.h, revision 1.1.1.1

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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