/*
* Initialize the TOD clock and the CPU timer of
* the boot cpu.
*/
void __init time_init(void)
{
struct timespec ts;
unsigned long flags;
cycle_t now;
/* Reset time synchronization interfaces. */
etr_reset();
stp_reset();
/* request the clock comparator external interrupt */
if (register_early_external_interrupt(0x1004,
clock_comparator_interrupt,
&ext_int_info_cc) != 0)
panic("Couldn't request external interrupt 0x1004");
/* request the timing alert external interrupt */
if (register_early_external_interrupt(0x1406,
timing_alert_interrupt,
&ext_int_etr_cc) != 0)
panic("Couldn't request external interrupt 0x1406");
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();
/* Enable cpu timer interrupts on the boot cpu. */
vtime_init();
}
unsigned long read_persistent_clock(void)
{
struct timespec ts;
tod_to_timeval(get_clock() - TOD_UNIX_EPOCH, &ts);
return ts.tv_sec;
}
int
debug_dflt_header_fn(debug_info_t * id, struct debug_view *view,
int area, debug_entry_t * entry, char *out_buf)
{
struct timespec time_spec;
unsigned long long time;
char *except_str;
unsigned long caller;
int rc = 0;
unsigned int level;
level = entry->id.fields.level;
time = entry->id.stck;
/* adjust todclock to 1970 */
time -= 0x8126d60e46000000LL - (0x3c26700LL * 1000000 * 4096);
tod_to_timeval(time, &time_spec);
if (entry->id.fields.exception)
except_str = "*";
else
except_str = "-";
caller = ((unsigned long) entry->caller) & PSW_ADDR_INSN;
rc += sprintf(out_buf, "%02i %011lu:%06lu %1u %1s %02i %p ",
area, time_spec.tv_sec, time_spec.tv_nsec / 1000, level,
except_str, entry->id.fields.cpuid, (void *) caller);
return rc;
}
/*
* Initialize the TOD clock and the CPU timer of
* the boot cpu.
*/
void __init time_init(void)
{
u64 init_timer_cc;
init_timer_cc = reset_tod_clock();
jiffies_timer_cc = init_timer_cc - jiffies_64 * CLK_TICKS_PER_JIFFY;
/* set xtime */
tod_to_timeval(init_timer_cc - TOD_UNIX_EPOCH, &xtime);
set_normalized_timespec(&wall_to_monotonic,
-xtime.tv_sec, -xtime.tv_nsec);
/* request the clock comparator external interrupt */
if (register_early_external_interrupt(0x1004,
clock_comparator_interrupt,
&ext_int_info_cc) != 0)
panic("Couldn't request external interrupt 0x1004");
if (clocksource_register(&clocksource_tod) != 0)
panic("Could not register TOD clock source");
/* request the timing alert external interrupt */
if (register_early_external_interrupt(0x1406,
timing_alert_interrupt,
&ext_int_etr_cc) != 0)
panic("Couldn't request external interrupt 0x1406");
/* Enable TOD clock interrupts on the boot cpu. */
init_cpu_timer();
#ifdef CONFIG_VIRT_TIMER
vtime_init();
#endif
}
/*
* Initialize the TOD clock and the CPU timer of
* the boot cpu.
*/
void __init time_init(void)
{
sched_clock_base_cc = reset_tod_clock();
/* set xtime */
tod_to_timeval(sched_clock_base_cc - TOD_UNIX_EPOCH, &xtime);
set_normalized_timespec(&wall_to_monotonic,
-xtime.tv_sec, -xtime.tv_nsec);
/* request the clock comparator external interrupt */
if (register_early_external_interrupt(0x1004,
clock_comparator_interrupt,
&ext_int_info_cc) != 0)
panic("Couldn't request external interrupt 0x1004");
if (clocksource_register(&clocksource_tod) != 0)
panic("Could not register TOD clock source");
/* request the timing alert external interrupt */
if (register_early_external_interrupt(0x1406,
timing_alert_interrupt,
&ext_int_etr_cc) != 0)
panic("Couldn't request external interrupt 0x1406");
/* Enable TOD clock interrupts on the boot cpu. */
init_cpu_timer();
/* Enable cpu timer interrupts on the boot cpu. */
vtime_init();
}
void read_boot_clock64(struct timespec64 *ts)
{
__u64 clock;
clock = sched_clock_base_cc - initial_leap_seconds;
tod_to_timeval(clock - TOD_UNIX_EPOCH, ts);
}
void read_persistent_clock64(struct timespec64 *ts)
{
__u64 clock;
clock = get_tod_clock() - initial_leap_seconds;
tod_to_timeval(clock - TOD_UNIX_EPOCH, ts);
}
void read_boot_clock(struct timespec *ts)
{
tod_to_timeval(sched_clock_base_cc - TOD_UNIX_EPOCH, ts);
}
void read_persistent_clock(struct timespec *ts)
{
tod_to_timeval(get_tod_clock() - TOD_UNIX_EPOCH, ts);
}
