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diff --git a/src/mem/ruby/tester/SyntheticDriver.hh b/src/mem/ruby/tester/SyntheticDriver.hh
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+++ b/src/mem/ruby/tester/SyntheticDriver.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.
+ */
+
+/*
+ * $Id$
+ *
+ * Description:
+ *
+ */
+
+#ifndef SYNTHETICDRIVER_H
+#define SYNTHETICDRIVER_H
+
+#include "Global.hh"
+#include "Driver.hh"
+#include "Histogram.hh"
+#include "CacheRequestType.hh"
+
+class System;
+class RequestGenerator;
+
+class SyntheticDriver : public Driver, public Consumer {
+public:
+  // Constructors
+  SyntheticDriver(System* sys_ptr);
+
+  // Destructor
+  ~SyntheticDriver();
+
+  // Public Methods
+  Address pickAddress(NodeID node);
+  void reportDone();
+  void recordTestLatency(Time time);
+  void recordSwapLatency(Time time);
+  void recordReleaseLatency(Time time);
+
+  void hitCallback(NodeID proc, SubBlock& data, CacheRequestType type, int thread);
+  void conflictCallback(NodeID proc, SubBlock& data, CacheRequestType type, int thread) {assert(0)};
+  void abortCallback(NodeID proc, SubBlock& data, CacheRequestType type, int thread);
+  void wakeup();
+  void printStats(ostream& out) const;
+  void clearStats() {}
+  void printConfig(ostream& out) const {}
+
+  integer_t readPhysicalMemory(int procID, physical_address_t address,
+                               int len );
+
+  void writePhysicalMemory( int procID, physical_address_t address,
+                            integer_t value, int len );
+
+  void print(ostream& out) const;
+
+  // For handling NACKs/retries
+  //void notifySendNack( int procID, const Address & addr, uint64 remote_timestamp, const MachineID & remote_id);
+  //void notifyReceiveNack( int procID, const Address & addr, uint64 remote_timestamp, const MachineID & remote_id);
+  //void notifyReceiveNackFinal( int procID, const Address & addr);
+
+private:
+  // Private Methods
+  void checkForDeadlock();
+
+  // Private copy constructor and assignment operator
+  SyntheticDriver(const SyntheticDriver& obj);
+  SyntheticDriver& operator=(const SyntheticDriver& obj);
+
+  // Data Members (m_ prefix)
+  Vector<Time> m_last_progress_vector;
+  Vector<RequestGenerator*> m_request_generator_vector;
+  Vector<NodeID> m_lock_vector;  // Processor last to hold the lock
+  int m_done_counter;
+
+  Histogram m_test_latency;
+  Histogram m_swap_latency;
+  Histogram m_release_latency;
+  Time m_finish_time;
+};
+
+// Output operator declaration
+ostream& operator<<(ostream& out, const SyntheticDriver& obj);
+
+// ******************* Definitions *******************
+
+// Output operator definition
+extern inline
+ostream& operator<<(ostream& out, const SyntheticDriver& obj)
+{
+  obj.print(out);
+  out << flush;
+  return out;
+}
+
+#endif //SYNTHETICDRIVER_H