Annotation of sys/arch/mvme68k/stand/libsa/clock.c, Revision 1.1.1.1
1.1 nbrk 1: /* $OpenBSD: clock.c,v 1.4 2003/08/20 00:26:00 deraadt Exp $ */
2:
3: #include <sys/types.h>
4: #include <machine/prom.h>
5:
6: #include "stand.h"
7: #include "libsa.h"
8:
9: /*
10: * BCD to decimal and decimal to BCD.
11: */
12: #define FROMBCD(x) (((x) >> 4) * 10 + ((x) & 0xf))
13: #define TOBCD(x) (((x) / 10 * 16) + ((x) % 10))
14:
15: #define SECDAY (24 * 60 * 60)
16: #define SECYR (SECDAY * 365)
17: #define LEAPYEAR(y) (((y) & 3) == 0)
18: #define YEAR0 68
19:
20:
21: /*
22: * This code is defunct after 2068.
23: * Will Unix still be here then??
24: */
25: const short dayyr[12] =
26: {0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334};
27:
28: static u_long
29: chiptotime(int sec, int min, int hour, int day, int mon, int year)
30: {
31: register int days, yr;
32:
33: sec = FROMBCD(sec);
34: min = FROMBCD(min);
35: hour = FROMBCD(hour);
36: day = FROMBCD(day);
37: mon = FROMBCD(mon);
38: year = FROMBCD(year) + YEAR0;
39: if (year < 70)
40: year = 70;
41:
42: /* simple sanity checks */
43: if (year < 70 || mon < 1 || mon > 12 || day < 1 || day > 31)
44: return (0);
45: days = 0;
46: for (yr = 70; yr < year; yr++)
47: days += LEAPYEAR(yr) ? 366 : 365;
48: days += dayyr[mon - 1] + day - 1;
49: if (LEAPYEAR(yr) && mon > 2)
50: days++;
51: /* now have days since Jan 1, 1970; the rest is easy... */
52: return (days * SECDAY + hour * 3600 + min * 60 + sec);
53: }
54:
55: time_t
56: getsecs(void)
57: {
58: struct mvmeprom_time m;
59:
60: mvmeprom_rtc_rd(&m);
61: return (chiptotime(m.sec_BCD, m.min_BCD, m.hour_BCD, m.day_BCD,
62: m.month_BCD, m.year_BCD));
63: }
CVSweb