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Kernel: Add HPET::read_main_counter()

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This commit is contained in:
Maciej Zygmanowski 2021-01-23 20:23:00 +01:00 committed by Andreas Kling
parent 67e93745cb
commit ceb5682b54
Notes: sideshowbarker 2024-07-18 22:50:16 +09:00 
Author: https://github.com/sppmacd
Commit: https://github.com/SerenityOS/serenity/commit/ceb5682b540
Pull-request: https://github.com/SerenityOS/serenity/pull/5046
Issue: https://github.com/SerenityOS/serenity/issues/4490
Reviewed-by: https://github.com/tomuta ✅
2 changed files with 7 additions and 0 deletions
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6
Kernel/Time/HPET.cpp
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@ -271,6 +271,12 @@ u64 HPET::update_time(u64& seconds_since_boot, u32& ticks_this_second, bool quer
return (delta_ticks * 1000000000ull) / ticks_per_second;
}
u64 HPET::read_main_counter() const
{
auto& main_counter = registers().main_counter_value;
return ((u64)main_counter.high << 32) | (u64)main_counter.low;
}
void HPET::enable_periodic_interrupt(const HPETComparator& comparator)
{
#if HPET_DEBUG

1
Kernel/Time/HPET.h
View File

@ -60,6 +60,7 @@ public:
void disable_periodic_interrupt(const HPETComparator& comparator);
u64 update_time(u64& seconds_since_boot, u32& ticks_this_second, bool query_only);
u64 read_main_counter() const;
Vector<unsigned> capable_interrupt_numbers(u8 comparator_number);
Vector<unsigned> capable_interrupt_numbers(const HPETComparator&);