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Annotation of 42BSD/sys/vax/clock.h, revision 1.1.1.1

1.1       root        1: /*     clock.h 6.1     83/07/29        */
                      2: 
                      3: /*
                      4:  * VAX clock registers
                      5:  */
                      6: 
                      7: #define        ICCS_RUN        0x00000001
                      8: #define        ICCS_TRANS      0x00000010
                      9: #define        ICCS_SS         0x00000020
                     10: #define        ICCS_IE         0x00000040
                     11: #define        ICCS_INT        0x00000080
                     12: #define        ICCS_ERR        0x80000000
                     13:        
                     14: #define        SECDAY          ((unsigned)(24*60*60))          /* seconds per day */
                     15: #define        SECYR           ((unsigned)(365*SECDAY))        /* per common year */
                     16: /*
                     17:  * TODRZERO is the what the TODR should contain when the ``year'' begins.
                     18:  * The TODR should always contain a number between 0 and SECYR+SECDAY.
                     19:  */
                     20: #define        TODRZERO        ((unsigned)(1<<28))
                     21: 
                     22: #define        YRREF           1970
                     23: #define        LEAPYEAR(year)  ((year)%4==0)   /* good till time becomes negative */
                     24: 
                     25: /*
                     26:  * Has the time-of-day clock wrapped around?
                     27:  */
                     28: #define        clkwrap()       (((unsigned)mfpr(TODR) - TODRZERO)/100 > SECYR+SECDAY)
                     29: 
                     30: /*
                     31:  * Software clock is software interrupt level 8,
                     32:  * implemented as mtpr(SIRR, 0x8) in asm.sed.
                     33:  */

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