diff -r 2796c1b4cbaa -r 5b73783aab4d src/mem/ruby/system/RubyPort.hh
--- a/src/mem/ruby/system/RubyPort.hh	Wed Jan 18 10:35:20 2012 +0000
+++ b/src/mem/ruby/system/RubyPort.hh	Wed Jan 18 10:36:05 2012 +0000
@@ -153,7 +153,7 @@
     uint16_t m_port_id;
     uint64_t m_request_cnt;
 
-    M5Port* physMemPort;
+    PioPort* physMemPort;
 
     /*! Vector of CPU Port attached to this Ruby port. */
     typedef std::vector<M5Port*>::iterator CpuPortIter;
diff -r 2796c1b4cbaa -r 5b73783aab4d src/mem/ruby/system/RubyPort.cc
--- a/src/mem/ruby/system/RubyPort.cc	Wed Jan 18 10:35:20 2012 +0000
+++ b/src/mem/ruby/system/RubyPort.cc	Wed Jan 18 10:36:05 2012 +0000
@@ -87,8 +87,7 @@
         // RubyPort should only have one port to physical memory
         assert (physMemPort == NULL);
 
-        physMemPort = new M5Port(csprintf("%s-physMemPort", name()), this,
-                                 ruby_system, access_phys_mem);
+        physMemPort = new PioPort(csprintf("%s-physMemPort", name()), this);
 
         return physMemPort;
     }