1 /* clock.h 4.5 81/02/23 */ 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 * Start a 60 HZ clock. 27 */ 28 #define clkstart() {\ 29 mtpr(NICR, -16667); /* 16.667 milli-seconds */\ 30 mtpr(ICCS, ICCS_RUN+ICCS_IE+ICCS_TRANS+ICCS_INT+ICCS_ERR);\ 31 } 32 #define clkreld() mtpr(ICCS, ICCS_RUN+ICCS_IE+ICCS_INT+ICCS_ERR) 33 34 #define clkwrap() (((unsigned)mfpr(TODR) - TODRZERO)/100 > SECYR+SECDAY) 35 36 /* 37 * Software clock is software interrupt level 8 38 */ 39 #define setsoftclock() mtpr(SIRR, 0x8) 40