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/*
* $Id: time.h,v 1.5 1997/08/27 22:06:58 cort Exp $
* Common time prototypes and such for all ppc machines.
*
* Written by Cort Dougan (cort@cs.nmt.edu) to merge
* Paul Mackerras' version and mine for PReP and Pmac.
*/
#include <linux/mc146818rtc.h>
/* time.c */
__inline__ unsigned long get_dec(void);
__inline__ void set_dec(int val);
void prep_calibrate_decr_handler(int, void *,struct pt_regs *);
void prep_calibrate_decr(void);
void pmac_calibrate_decr(void);
void chrp_calibrate_decr(void);
extern unsigned decrementer_count;
extern unsigned count_period_num;
extern unsigned count_period_den;
extern unsigned long mktime(unsigned int, unsigned int,unsigned int,
unsigned int, unsigned int, unsigned int);
/* pmac/prep/chrp_time.c */
unsigned long prep_get_rtc_time(void);
unsigned long pmac_get_rtc_time(void);
unsigned long chrp_get_rtc_time(void);
int prep_set_rtc_time(unsigned long nowtime);
int pmac_set_rtc_time(unsigned long nowtime);
int chrp_set_rtc_time(unsigned long nowtime);
void pmac_read_rtc_time(void);
#define TICK_SIZE tick
#define FEBRUARY 2
#define STARTOFTIME 1970
#define SECDAY 86400L
#define SECYR (SECDAY * 365)
#define leapyear(year) ((year) % 4 == 0)
#define days_in_year(a) (leapyear(a) ? 366 : 365)
#define days_in_month(a) (month_days[(a) - 1])
static int month_days[12] = {
31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31
};
extern void inline to_tm(int tim, struct rtc_time * tm)
{
register int i;
register long hms, day;
day = tim / SECDAY;
hms = tim % SECDAY;
/* Hours, minutes, seconds are easy */
tm->tm_hour = hms / 3600;
tm->tm_min = (hms % 3600) / 60;
tm->tm_sec = (hms % 3600) % 60;
/* Number of years in days */
for (i = STARTOFTIME; day >= days_in_year(i); i++)
day -= days_in_year(i);
tm->tm_year = i;
/* Number of months in days left */
if (leapyear(tm->tm_year))
days_in_month(FEBRUARY) = 29;
for (i = 1; day >= days_in_month(i); i++)
day -= days_in_month(i);
days_in_month(FEBRUARY) = 28;
tm->tm_mon = i;
/* Days are what is left over (+1) from all that. */
tm->tm_mday = day + 1;
}
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