diff options
Diffstat (limited to 'src/cpu/x86/tsc/delay_tsc.c')
| -rw-r--r-- | src/cpu/x86/tsc/delay_tsc.c | 23 |
1 files changed, 3 insertions, 20 deletions
diff --git a/src/cpu/x86/tsc/delay_tsc.c b/src/cpu/x86/tsc/delay_tsc.c index afcd1d1f7d..7aa887ae63 100644 --- a/src/cpu/x86/tsc/delay_tsc.c +++ b/src/cpu/x86/tsc/delay_tsc.c @@ -18,26 +18,9 @@ #include <delay.h> #include <thread.h> -static unsigned long clocks_per_usec CAR_GLOBAL; - -static unsigned long calibrate_tsc(void) -{ - if (CONFIG(TSC_CONSTANT_RATE)) - return tsc_freq_mhz(); - else - return calibrate_tsc_with_pit(); -} - void init_timer(void) { - if (!car_get_var(clocks_per_usec)) - car_set_var(clocks_per_usec, calibrate_tsc()); -} - -static inline unsigned long get_clocks_per_usec(void) -{ - init_timer(); - return car_get_var(clocks_per_usec); + (void)tsc_freq_mhz(); } void udelay(unsigned int us) @@ -51,7 +34,7 @@ void udelay(unsigned int us) start = rdtscll(); clocks = us; - clocks *= get_clocks_per_usec(); + clocks *= tsc_freq_mhz(); current = rdtscll(); while ((current - start) < clocks) { cpu_relax(); @@ -89,7 +72,7 @@ void timer_monotonic_get(struct mono_time *mt) current_tick = rdtscll(); ticks_elapsed = current_tick - mono_counter->last_value; - ticks_per_usec = get_clocks_per_usec(); + ticks_per_usec = tsc_freq_mhz(); /* Update current time and tick values only if a full tick occurred. */ if (ticks_elapsed >= ticks_per_usec) { |