clock.c revision 1.11 
1/*	$NetBSD: clock.c,v 1.11 2014/11/20 16:34:25 christos Exp $ */
2
3#include <sys/types.h>
4#include <dev/clock_subr.h>
5#include <machine/prom.h>
6
7#include <lib/libsa/stand.h>
8#include <lib/libsa/net.h>
9#include "libsa.h"
10
11/*
12 * BCD to decimal and decimal to BCD.
13 */
14#define YEAR0		68
15
16/*
17 * This code is defunct after 2068.
18 * Will Unix still be here then??
19 */
20const short dayyr[12] =
21    {0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334};
22
23u_long
24chiptotime(int sec, int min, int hour, int day, int mon, int year)
25{
26	int days, yr;
27
28	sec = bcdtobin(sec);
29	min = bcdtobin(min);
30	hour = bcdtobin(hour);
31	day = bcdtobin(day);
32	mon = bcdtobin(mon);
33	year = bcdtobin(year) + YEAR0;
34	if (year < 70)
35		year = 70;
36
37	/* simple sanity checks */
38	if (year < 70 || mon < 1 || mon > 12 || day < 1 || day > 31)
39		return (0);
40	days = 0;
41	for (yr = 70; yr < year; yr++)
42		days += days_per_year(yr);
43	days += dayyr[mon - 1] + day - 1;
44	if (is_leap_year(yr) && mon > 2)
45		days++;
46	/* now have days since Jan 1, 1970; the rest is easy... */
47	return days * SECS_PER_DAY + hour * SECS_PER_HOUR
48	    + min * SECS_PER_MINUTE + sec;
49}
50
51satime_t
52getsecs(void)
53{
54	struct mvmeprom_time m;
55
56	mvmeprom_rtc_rd(&m);
57	return chiptotime(m.sec_BCD, m.min_BCD, m.hour_BCD, m.day_BCD,
58	    m.month_BCD, m.year_BCD);
59}
60