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| author | Maciej Zygmanowski <sppmacd@pm.me> | 2021-01-23 20:23:00 +0100 |
|---|---|---|
| committer | Andreas Kling <kling@serenityos.org> | 2021-01-26 21:14:44 +0100 |
| commit | ceb5682b5407f1606b4cbf712de86e1640446ed2 (patch) | |
| tree | 473f2875938835447effb2d58519cbb6fb1c370f /Kernel | |
| parent | 67e93745cb8173218e8e2c67f4e39c87a47d72f5 (diff) | |
| download | serenity-ceb5682b5407f1606b4cbf712de86e1640446ed2.zip | |
Kernel: Add HPET::read_main_counter()
Diffstat (limited to 'Kernel')
| -rw-r--r-- | Kernel/Time/HPET.cpp | 6 | ||||
| -rw-r--r-- | Kernel/Time/HPET.h | 1 |
2 files changed, 7 insertions, 0 deletions
diff --git a/Kernel/Time/HPET.cpp b/Kernel/Time/HPET.cpp index f2659d6a7c..e534a7b974 100644 --- a/Kernel/Time/HPET.cpp +++ b/Kernel/Time/HPET.cpp @@ -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 diff --git a/Kernel/Time/HPET.h b/Kernel/Time/HPET.h index e9460d3484..696617bbbe 100644 --- a/Kernel/Time/HPET.h +++ b/Kernel/Time/HPET.h @@ -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&); |