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Kernel: Fix APIC timer frequency

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The APIC current count register decrements on each clock tick.
Fixes the APIC timer firing much less frequently than it should be.
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Tom 2020-10-29 15:07:20 -06:00 • committed by Andreas Kling
commit d076b00248
Notes: sideshowbarker 2024-07-19 01:39:26 +09:00
1 changed files with 1 additions and 1 deletions
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2
Kernel/Time/APICTimer.cpp
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@ -112,7 +112,7 @@ bool APICTimer::calibrate(HardwareTimerBase& calibration_source)
disable_local_timer();
auto delta_apic_count = end_apic_count - start_apic_count;
auto delta_apic_count = start_apic_count - end_apic_count; // The APIC current count register decrements!
m_timer_period = (delta_apic_count * apic.get_timer_divisor()) / ticks_in_100ms;
auto apic_freq = (delta_apic_count * apic.get_timer_divisor()) / apic.get_timer_divisor();