1 /* $NetBSD: clock.c,v 1.3 2009/03/18 10:22:33 cegger Exp $ */ 2 3 /* 4 * This is a slightly modified version of mvme68k's standalone clock.c. 5 * As there was no attribution/copyright header on that file, there's 6 * not going to be one for this file. 7 */ 8 9 #include <sys/types.h> 10 11 #include "stand.h" 12 #include "net.h" 13 #include "libsa.h" 14 #include "bugsyscalls.h" 15 16 #define FROMBCD(x) (int)((((unsigned int)(x)) >> 4) * 10 +\ 17 (((unsigned int)(x)) & 0xf)) 18 19 #define SECDAY (24 * 60 * 60) 20 #define SECYR (SECDAY * 365) 21 #define LEAPYEAR(y) (((y) & 3) == 0) 22 #define YEAR0 68 23 24 /* 25 * This code is defunct after 2068. 26 * Will Unix still be here then?? 27 */ 28 const short dayyr[12] = 29 {0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334}; 30 31 static u_long 32 chiptotime(int sec, int min, int hour, int day, int mon, int year) 33 { 34 int days, yr; 35 36 sec = FROMBCD(sec); 37 min = FROMBCD(min); 38 hour = FROMBCD(hour); 39 day = FROMBCD(day); 40 mon = FROMBCD(mon); 41 year = FROMBCD(year) + YEAR0; 42 if (year < 70) 43 year = 70; 44 45 /* simple sanity checks */ 46 if (year < 70 || mon < 1 || mon > 12 || day < 1 || day > 31) 47 return (0); 48 days = 0; 49 for (yr = 70; yr < year; yr++) 50 days += LEAPYEAR(yr) ? 366 : 365; 51 days += dayyr[mon - 1] + day - 1; 52 if (LEAPYEAR(yr) && mon > 2) 53 days++; 54 /* now have days since Jan 1, 1970; the rest is easy... */ 55 return (days * SECDAY + hour * 3600 + min * 60 + sec); 56 } 57 58 satime_t 59 getsecs(void) 60 { 61 struct bug_rtc_rd rr; 62 63 bugsys_rtc_rd(&rr); 64 65 return (chiptotime(rr.rr_second, rr.rr_minute, rr.rr_hour, 66 rr.rr_dayofmonth, rr.rr_month, rr.rr_year)); 67 } 68