Extract PFN management into separate module

xtoskrnl/includes/mm/pfn.hh

@@ -0,0 +1,32 @@
+/**
+ * PROJECT:         ExectOS
+ * COPYRIGHT:       See COPYING.md in the top level directory
+ * FILE:            xtoskrnl/includes/mm/pfn.hh
+ * DESCRIPTION:     Physical Frame Number (PFN) support
+ * DEVELOPERS:      Aiken Harris <harraiken91@gmail.com>
+ */
+
+#ifndef __XTOSKRNL_MM_PFN_HH
+#define __XTOSKRNL_MM_PFN_HH
+
+#include <xtos.hh>
+
+
+/* Memory Manager */
+namespace MM
+{
+    class Pfn
+    {
+        private:
+            STATIC PLOADER_MEMORY_DESCRIPTOR FreeDescriptor;
+            STATIC ULONG_PTR HighestPhysicalPage;
+            STATIC ULONG_PTR LowestPhysicalPage;
+            STATIC ULONG NumberOfPhysicalPages;
+            STATIC LOADER_MEMORY_DESCRIPTOR OldFreeDescriptor;
+
+        public:
+            STATIC XTAPI VOID ScanMemoryDescriptors(VOID);
+    };
+}
+
+#endif /* __XTOSKRNL_MM_PFN_HH */