diff options
Diffstat (limited to 'sys/isa/atrtc.c')
| -rw-r--r-- | sys/isa/atrtc.c | 23 |
1 files changed, 22 insertions, 1 deletions
diff --git a/sys/isa/atrtc.c b/sys/isa/atrtc.c index e0a638e..1893b19 100644 --- a/sys/isa/atrtc.c +++ b/sys/isa/atrtc.c @@ -705,7 +705,7 @@ set_timer_freq(u_int freq, int intr_freq) * when it happnes, it messes up the hardclock interval and system clock, * which leads to the infamous "calcru: negative time" problem. */ -void +static void i8254_restore(void) { @@ -716,6 +716,27 @@ i8254_restore(void) mtx_unlock_spin(&clock_lock); } +static void +rtc_restore(void) +{ + + /* Reenable RTC updates and interrupts. */ + /* XXX locking is needed for RTC access? */ + writertc(RTC_STATUSB, RTCSB_HALT | RTCSB_24HR); + writertc(RTC_STATUSB, rtc_statusb); +} + +/* + * Restore all the timers atomically. + */ +void +timer_restore(void) +{ + + i8254_restore(); /* restore timer_freq and hz */ + rtc_restore(); /* reenable RTC interrupts */ +} + /* * Initialize 8254 timer 0 early so that it can be used in DELAY(). * XXX initialization of other timers is unintentionally left blank. |
