Implement VirtualAllocation class

include/memory/va.hpp

@@ -0,0 +1,60 @@
+/*
+	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/>.
+*/
+
+#ifndef __FENNIX_KERNEL_MEMORY_VA_H__
+#define __FENNIX_KERNEL_MEMORY_VA_H__
+
+#include <types.h>
+#include <lock.hpp>
+#include <list>
+
+#include <memory/table.hpp>
+
+namespace Memory
+{
+	class VirtualAllocation
+	{
+	public:
+		struct AllocatedPages
+		{
+			void *PhysicalAddress;
+			void *VirtualAddress;
+			size_t PageCount;
+			bool Free;
+		};
+
+	private:
+		NewLock(MgrLock);
+
+		std::list<AllocatedPages> AllocatedPagesList;
+		void *BaseAddress;
+		void *CurrentBase;
+
+	public:
+		PageTable *Table;
+
+		AllocatedPages RequestPages(size_t Count);
+		void FreePages(void *Address, size_t Count);
+
+		void MapTo(AllocatedPages ap, PageTable *Table);
+
+		VirtualAllocation(void *Base);
+		~VirtualAllocation();
+	};
+}
+
+#endif // !__FENNIX_KERNEL_MEMORY_VA_H__