sys/arch/mvmeppc/stand/libsa/clock.c

   1 /*      $NetBSD: clock.c,v 1.2 2009/01/12 11:32:44 tsutsui 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 }