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[kernel] Add HPET support, create clock class

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Create a clock class which can be queried for current timestamp in
nanoseconds. Also implements a simple HPET class as one possible clock
source.

Tags: time
This commit is contained in:
Justin C. Miller
2020-06-28 17:47:46 -07:00
parent 9b67f87062
commit 6c468a134b
13 changed files with 347 additions and 36 deletions
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4
src/kernel/apic.h
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@@ -6,7 +6,6 @@
enum class isr : uint8_t;
/// Base class for other APIC types
class apic
{
@@ -54,7 +53,7 @@ public:
void enable(); ///< Enable servicing of interrupts
void disable(); ///< Disable (temporarily) servicing of interrupts
/// Calibrate the timer speed against the PIT
/// Calibrate the timer speed against the clock
void calibrate_timer();
private:
@@ -68,7 +67,6 @@ private:
void set_divisor(uint8_t divisor);
void set_repeat(bool repeat);
uint32_t enable_timer_internal(isr vector, uint8_t divisor, uint32_t count, bool repeat);
uint32_t m_divisor;
uint32_t m_ticks_per_us;