diff --git a/lpc_handler.hpp b/lpc_handler.hpp
index cbdf8ef..4158b9b 100644
--- a/lpc_handler.hpp
+++ b/lpc_handler.hpp
@@ -1,6 +1,7 @@
 #pragma once
 
 #include "data_handler.hpp"
+#include "mapper_errors.hpp"
 #include "window_hw_interface.hpp"
 
 #include <cstdint>
@@ -45,12 +46,37 @@
   private:
     bool setInitializedAndReturn(bool value)
     {
+        if (value)
+        {
+            try
+            {
+                /* Try really opening the map. */
+                memory = mapper->open();
+            }
+            catch (const MapperException& e)
+            {
+                std::fprintf(stderr, "received mapper exception: %s\n",
+                             e.what());
+                return false;
+            }
+        }
+
         initialized = value;
         return value;
     }
 
     std::unique_ptr<HardwareMapperInterface> mapper;
     bool initialized;
+    /* The LPC Handler does not take ownership of this, in case there's cleanup
+     * required for close()
+     */
+    MemorySet memory = {};
+
+    /* Offset in reserved memory at which host data arrives. */
+    /* Size of the chunk of the memory region in use by the host (e.g.
+     * mapped over external block mechanism).
+     */
+    WindowMapResult mappingResult = {};
 };
 
 } // namespace ipmi_flash