Merge remote-tracking branch 'Kernel/master'

Kernel/core/time/tsc.cpp

@@ -0,0 +1,76 @@
+/*
+	This file is part of Fennix Kernel.
+
+	Fennix Kernel is free software: you can redistribute it and/or
+	modify it under the terms of the GNU General Public License as
+	published by the Free Software Foundation, either version 3 of
+	the License, or (at your option) any later version.
+
+	Fennix Kernel is distributed in the hope that it will be useful,
+	but WITHOUT ANY WARRANTY; without even the implied warranty of
+	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+	GNU General Public License for more details.
+
+	You should have received a copy of the GNU General Public License
+	along with Fennix Kernel. If not, see <https://www.gnu.org/licenses/>.
+*/
+
+#include <time.hpp>
+
+#include <memory.hpp>
+#include <acpi.hpp>
+#include <debug.h>
+#include <io.h>
+
+#include "../../kernel.h"
+
+namespace Time
+{
+	bool TimeStampCounter::Sleep(size_t Duration, Units Unit)
+	{
+#if defined(a86)
+		uint64_t Target = this->GetCounter() + (Duration * ConvertUnit(Unit)) / this->clk;
+		while (this->GetCounter() < Target)
+			CPU::Pause();
+		return true;
+#endif
+	}
+
+	uint64_t TimeStampCounter::GetCounter()
+	{
+#if defined(a86)
+		return CPU::Counter();
+#endif
+	}
+
+	uint64_t TimeStampCounter::CalculateTarget(uint64_t Target, Units Unit)
+	{
+#if defined(a86)
+		return uint64_t((this->GetCounter() + (Target * ConvertUnit(Unit))) / this->clk);
+#endif
+	}
+
+	uint64_t TimeStampCounter::GetNanosecondsSinceClassCreation()
+	{
+#if defined(a86)
+		return uint64_t((this->GetCounter() - this->ClassCreationTime) / this->clk);
+#endif
+	}
+
+	TimeStampCounter::TimeStampCounter()
+	{
+#if defined(a86)
+		stub; // FIXME: This is not a good way to measure the clock speed
+		uint64_t Start = CPU::Counter();
+		TimeManager->Sleep(1, Units::Milliseconds);
+		uint64_t End = CPU::Counter();
+
+		this->clk = End - Start;
+		this->ClassCreationTime = this->GetCounter();
+#endif
+	}
+
+	TimeStampCounter::~TimeStampCounter()
+	{
+	}
+}