Kernel: Add some bareboness functionality to map virtual addresses

kernel/include/kernel/Memory/Heap.h

@@ -59,8 +59,8 @@ namespace Kernel::Memory
 		static void initialize();
 		static Heap& get();
 
-		paddr_t take_mapped_page(uint8_t);
-		void return_mapped_page(paddr_t);
+		paddr_t take_free_page();
+		void release_page(paddr_t);
 
 	private:
 		Heap() = default;

kernel/include/kernel/Memory/MMU.h

@@ -13,6 +13,9 @@ public:
 		UserSupervisor = 4,
 	};
 
+	using vaddr_t = uintptr_t;
+	using paddr_t = uintptr_t;
+
 public:
 	static void intialize();
 	static MMU& get();
@@ -26,6 +29,8 @@ public:
 	void unmap_page(uintptr_t);
 	void unmap_range(uintptr_t, ptrdiff_t);
 
+	void map_page_at(paddr_t, vaddr_t, uint8_t);
+
 private:
 	uint64_t* m_highest_paging_struct;
 };