Initial commit

common/core/TickCounter.h

@@ -0,0 +1,26 @@
+#pragma once
+
+class TickCounter
+{
+public:
+    void Start();
+    void Stop();
+    u64 GetValue();
+
+    static u32 TicksToMilliSeconds(u32 ticks)
+    {
+        return ((ticks * 8201887ULL) + (1ULL << 31)) >> 32;
+    }
+
+    static u32 TicksToMicroSeconds(u32 ticks)
+    {
+        return (ticks * 4100943703ULL + (1 << 30)) >> 31;
+    }
+
+private:
+    u64 _msb = 0;
+
+    void TimerOverflowIrq();
+};
+
+extern TickCounter gTickCounter;