Add interface to retrieve page map level (PML)

xtoskrnl/mm/i686/pagemap.cc

@@ -9,6 +9,20 @@
 #include <xtos.hh>
 
 
+/**
+ * Gets Page Map Level (PML) for current paging mode.
+ *
+ * @return This routine returns the page map level.
+ *
+ * @since XT 1.0
+ */
+XTAPI
+USHORT
+MM::PageMap::GetPageMapLevel()
+{
+    return PageMapInfo.Xpa ? 3 : 2;
+}
+
 /**
  * Gets the address of the PDE (Page Directory Entry), that maps given address.
  *