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diff --git a/src/mem/ruby/network/Network.hh b/src/mem/ruby/network/Network.hh
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+
+/*
+ * Copyright (c) 1999-2008 Mark D. Hill and David A. Wood
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met: redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer;
+ * redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution;
+ * neither the name of the copyright holders nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/*
+ * Network.h
+ *
+ * Description: The Network class is the base class for classes that
+ * implement the interconnection network between components
+ * (processor/cache components and memory/directory components).  The
+ * interconnection network as described here is not a physical
+ * network, but a programming concept used to implement all
+ * communication between components.  Thus parts of this 'network'
+ * will model the on-chip connections between cache controllers and
+ * directory controllers as well as the links between chip and network
+ * switches.
+ *
+ * $Id$
+ * */
+
+#ifndef NETWORK_H
+#define NETWORK_H
+
+#include "Global.hh"
+#include "NodeID.hh"
+#include "MessageSizeType.hh"
+
+class NetDest;
+class MessageBuffer;
+class Throttle;
+
+class Network {
+public:
+  // Constructors
+  Network() {}
+
+  // Destructor
+  virtual ~Network() {}
+
+  // Public Methods
+
+  static Network* createNetwork(int nodes);
+
+  // returns the queue requested for the given component
+  virtual MessageBuffer* getToNetQueue(NodeID id, bool ordered, int netNumber) = 0;
+  virtual MessageBuffer* getFromNetQueue(NodeID id, bool ordered, int netNumber) = 0;
+  virtual const Vector<Throttle*>* getThrottles(NodeID id) const { return NULL; }
+
+  virtual int getNumNodes() {return 1;}
+
+  virtual void makeOutLink(SwitchID src, NodeID dest, const NetDest& routing_table_entry, int link_latency, int link_weight, int bw_multiplier, bool isReconfiguration) = 0;
+  virtual void makeInLink(SwitchID src, NodeID dest, const NetDest& routing_table_entry, int link_latency, int bw_multiplier, bool isReconfiguration) = 0;
+  virtual void makeInternalLink(SwitchID src, NodeID dest, const NetDest& routing_table_entry, int link_latency, int link_weight, int bw_multiplier, bool isReconfiguration) = 0;
+
+  virtual void reset() = 0;
+
+  virtual void printStats(ostream& out) const = 0;
+  virtual void clearStats() = 0;
+  virtual void printConfig(ostream& out) const = 0;
+  virtual void print(ostream& out) const = 0;
+
+private:
+
+  // Private Methods
+  // Private copy constructor and assignment operator
+  Network(const Network& obj);
+  Network& operator=(const Network& obj);
+
+  // Data Members (m_ prefix)
+};
+
+// Output operator declaration
+ostream& operator<<(ostream& out, const Network& obj);
+
+// ******************* Definitions *******************
+
+// Output operator definition
+extern inline
+ostream& operator<<(ostream& out, const Network& obj)
+{
+  obj.print(out);
+  out << flush;
+  return out;
+}
+
+// Code to map network message size types to an integer number of bytes
+const int CONTROL_MESSAGE_SIZE = 8;
+const int DATA_MESSAGE_SIZE = (64+8);
+
+extern inline
+int MessageSizeType_to_int(MessageSizeType size_type)
+{
+  switch(size_type) {
+  case MessageSizeType_Undefined:
+    ERROR_MSG("Can't convert Undefined MessageSizeType to integer");
+    break;
+  case MessageSizeType_Control:
+  case MessageSizeType_Request_Control:
+  case MessageSizeType_Reissue_Control:
+  case MessageSizeType_Response_Control:
+  case MessageSizeType_Writeback_Control:
+  case MessageSizeType_Forwarded_Control:
+  case MessageSizeType_Invalidate_Control:
+  case MessageSizeType_Unblock_Control:
+  case MessageSizeType_Persistent_Control:
+  case MessageSizeType_Completion_Control:
+    return CONTROL_MESSAGE_SIZE;
+    break;
+  case MessageSizeType_Data:
+  case MessageSizeType_Response_Data:
+  case MessageSizeType_ResponseLocal_Data:
+  case MessageSizeType_ResponseL2hit_Data:
+  case MessageSizeType_Writeback_Data:
+    return DATA_MESSAGE_SIZE;
+    break;
+  default:
+    ERROR_MSG("Invalid range for type MessageSizeType");
+    break;
+  }
+  return 0;
+}
+
+#endif //NETWORK_H