void __init time_init(void)
{
unsigned long next_tick;
static struct pdc_tod tod_data;
clocktick = (100 * PAGE0->mem_10msec) / HZ;
halftick = clocktick / 2;
/* Setup clock interrupt timing */
next_tick = mfctl(16);
next_tick += clocktick;
cpu_data[smp_processor_id()].it_value = next_tick;
/* kick off Itimer (CR16) */
mtctl(next_tick, 16);
if(pdc_tod_read(&tod_data) == 0) {
write_lock_irq(&xtime_lock);
xtime.tv_sec = tod_data.tod_sec;
xtime.tv_usec = tod_data.tod_usec;
write_unlock_irq(&xtime_lock);
} else {
printk(KERN_ERR "Error reading tod clock\n");
xtime.tv_sec = 0;
xtime.tv_usec = 0;
}
}
void read_persistent_clock(struct timespec *ts)
{
static struct pdc_tod tod_data;
if (pdc_tod_read(&tod_data) == 0) {
ts->tv_sec = tod_data.tod_sec;
ts->tv_nsec = tod_data.tod_usec * 1000;
} else {
printk(KERN_ERR "Error reading tod clock\n");
ts->tv_sec = 0;
ts->tv_nsec = 0;
}
}
static int rtc_generic_get_time(struct device *dev, struct rtc_time *tm)
{
struct pdc_tod tod_data;
memset(tm, 0, sizeof(*tm));
if (pdc_tod_read(&tod_data) < 0)
return -EOPNOTSUPP;
/* we treat tod_sec as unsigned, so this can work until year 2106 */
rtc_time64_to_tm(tod_data.tod_sec, tm);
return rtc_valid_tm(tm);
}
