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Annotation of researchv9/sys.vax/h/clock.h, revision 1.1

1.1     ! root        1: /*
        !             2:  * VAX clock registers
        !             3:  */
        !             4: 
        !             5: #define        ICCS_RUN        0x00000001
        !             6: #define        ICCS_TRANS      0x00000010
        !             7: #define        ICCS_SS         0x00000020
        !             8: #define        ICCS_IE         0x00000040
        !             9: #define        ICCS_INT        0x00000080
        !            10: #define        ICCS_ERR        0x80000000
        !            11:        
        !            12: #define        SECDAY          ((unsigned)(24*60*60))          /* seconds per day */
        !            13: #define        SECYR           ((unsigned)(365*SECDAY))        /* per common year */
        !            14: /*
        !            15:  * TODRZERO is the what the TODR should contain when the ``year'' begins.
        !            16:  * The TODR should always contain a number between 0 and SECYR+SECDAY.
        !            17:  */
        !            18: #define        TODRZERO        ((unsigned)(1<<28))
        !            19: 
        !            20: #define        YRREF           1970
        !            21: #define        LEAPYEAR(year)  ((year)%4==0)   /* good till time becomes negative */
        !            22: 
        !            23: /*
        !            24:  * Start a 60 HZ clock.
        !            25:  */
        !            26: #define        clkstart() {\
        !            27:        mtpr(NICR, -16667);     /* 16.667 milli-seconds */\
        !            28:        mtpr(ICCS, ICCS_RUN+ICCS_IE+ICCS_TRANS+ICCS_INT+ICCS_ERR);\
        !            29: }
        !            30: #define        clkreld()       mtpr(ICCS, ICCS_RUN+ICCS_IE+ICCS_INT+ICCS_ERR)
        !            31: 
        !            32: #define        clkwrap()       (((unsigned)mfpr(TODR) - TODRZERO)/100 > SECYR+SECDAY)
        !            33: 
        !            34: /*
        !            35:  * Software clock is software interrupt level 8
        !            36:  */
        !            37: #define        setsoftclock()  mtpr(SIRR, 0x8)

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