diff options
Diffstat (limited to 'include/timer.h')
| -rw-r--r-- | include/timer.h | 31 |
1 files changed, 21 insertions, 10 deletions
diff --git a/include/timer.h b/include/timer.h index fb7800ce2e..26d39a975d 100644 --- a/include/timer.h +++ b/include/timer.h @@ -71,7 +71,7 @@ int timestamp_expired(timestamp_t deadline, const timestamp_t *now); * * @param us Number of microseconds to delay. */ -void udelay(unsigned us); +__override_proto void udelay(unsigned us); /** * Sleep. @@ -133,6 +133,23 @@ void force_time(timestamp_t ts); void timer_print_info(void); /** + * Returns a free running millisecond clock counter, which matches tpm2 + * library expectations. + */ +clock_t clock(void); + +/** + * Compute how far to_time is from from_time with rollover taken into account + * + * Return us until to_time given from_time, if negative then to_time has + * passeed from_time. + */ +static inline int time_until(uint32_t from_time, uint32_t to_time) +{ + return (int32_t)(to_time - from_time); +} + +/** * Returns the number of microseconds that have elapsed from a start time. * * This function is for timing short delays typically of a few milliseconds @@ -142,27 +159,21 @@ void timer_print_info(void); * hour. After that, the value returned will wrap. * * @param start Start time to compare against - * @return number of microseconds that have elspsed since that start time + * @return number of microseconds that have elapsed since that start time */ static inline unsigned time_since32(timestamp_t start) { - return get_time().le.lo - start.le.lo; + return time_until(start.le.lo, get_time().le.lo); } /** - * Returns a free running millisecond clock counter, which matches tpm2 - * library expectations. - */ -clock_t clock(void); - -/** * To compare time and deal with rollover * * Return true if a is after b. */ static inline int time_after(uint32_t a, uint32_t b) { - return (int32_t)(b - a) < 0; + return time_until(a, b) < 0; } #endif /* __CROS_EC_TIMER_H */ |