Add GetPageFrameNumber() to PTE interfaces

xtoskrnl/mm/amd64/pagemap.cc

@@ -173,6 +173,23 @@ MM::PageMap::GetP5eVirtualAddress(IN PMMP5E P5ePointer)
     return (PVOID)((((LONGLONG)P5ePointer << 61) >> 16) * PageMapInfo.Xpa);
 }
 
+/**
+ * Gets the page frame number from a corresponding PTE.
+ *
+ * @param Pte
+ *        The PTE pointer to get the page frame number from.
+ *
+ * @return This routine returns the page frame number.
+ *
+ * @since XT 1.0
+ */
+XTAPI
+PFN_NUMBER
+MM::PageMap::GetPageFrameNumber(IN PMMPTE Pte)
+{
+    return Pte->Hardware.PageFrameNumber;
+}
+
 /**
  * Gets the address of the PDE (Page Directory Entry), that maps given address.
  *