#define TICK_SIZE tick
u64 sched_clock_base_cc = -1; /* Force to data section. */
+EXPORT_SYMBOL_GPL(sched_clock_base_cc);
static DEFINE_PER_CPU(struct clock_event_device, comparators);
*/
unsigned long long notrace sched_clock(void)
{
- return ((get_clock_xt() - sched_clock_base_cc) * 125) >> 9;
+ return (get_clock_monotonic() * 125) >> 9;
}
/*
todval -= (sec * 1000000) << 12;
xtime->tv_nsec = ((todval * 1000) >> 12);
}
+EXPORT_SYMBOL(tod_to_timeval);
void clock_comparator_work(void)
{
static void etr_reset(void);
static void stp_reset(void);
-unsigned long read_persistent_clock(void)
+void read_persistent_clock(struct timespec *ts)
{
- struct timespec ts;
+ tod_to_timeval(get_clock() - TOD_UNIX_EPOCH, ts);
+}
- tod_to_timeval(get_clock() - TOD_UNIX_EPOCH, &ts);
- return ts.tv_sec;
+void read_boot_clock(struct timespec *ts)
+{
+ tod_to_timeval(sched_clock_base_cc - TOD_UNIX_EPOCH, ts);
}
static cycle_t read_tod_clock(struct clocksource *cs)
.flags = CLOCK_SOURCE_IS_CONTINUOUS,
};
+struct clocksource * __init clocksource_default_clock(void)
+{
+ return &clocksource_tod;
+}
void update_vsyscall(struct timespec *wall_time, struct clocksource *clock)
{
*/
void __init time_init(void)
{
- struct timespec ts;
- unsigned long flags;
- cycle_t now;
-
/* Reset time synchronization interfaces. */
etr_reset();
stp_reset();
if (clocksource_register(&clocksource_tod) != 0)
panic("Could not register TOD clock source");
- /*
- * The TOD clock is an accurate clock. The xtime should be
- * initialized in a way that the difference between TOD and
- * xtime is reasonably small. Too bad that timekeeping_init
- * sets xtime.tv_nsec to zero. In addition the clock source
- * change from the jiffies clock source to the TOD clock
- * source add another error of up to 1/HZ second. The same
- * function sets wall_to_monotonic to a value that is too
- * small for /proc/uptime to be accurate.
- * Reset xtime and wall_to_monotonic to sane values.
- */
- write_seqlock_irqsave(&xtime_lock, flags);
- now = get_clock();
- tod_to_timeval(now - TOD_UNIX_EPOCH, &xtime);
- clocksource_tod.cycle_last = now;
- clocksource_tod.raw_time = xtime;
- tod_to_timeval(sched_clock_base_cc - TOD_UNIX_EPOCH, &ts);
- set_normalized_timespec(&wall_to_monotonic, -ts.tv_sec, -ts.tv_nsec);
- write_sequnlock_irqrestore(&xtime_lock, flags);
-
/* Enable TOD clock interrupts on the boot cpu. */
init_cpu_timer();