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diff --git a/src/mem/ruby/system/TimerTable.hh b/src/mem/ruby/system/TimerTable.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.
+ */
+
+/*
+ * TimerTable.h
+ *
+ * Description:
+ *
+ * $Id$
+ *
+ */
+
+#ifndef TIMERTABLE_H
+#define TIMERTABLE_H
+
+#include "Global.hh"
+#include "Map.hh"
+#include "Address.hh"
+class Consumer;
+class Chip;
+
+class TimerTable {
+public:
+
+  // Constructors
+  TimerTable(Chip* chip_ptr);
+
+  // Destructor
+  //~TimerTable();
+
+  // Class Methods
+  static void printConfig(ostream& out) {}
+
+  // Public Methods
+  void setConsumer(Consumer* consumer_ptr) { ASSERT(m_consumer_ptr==NULL); m_consumer_ptr = consumer_ptr; }
+  void setDescription(const string& name) { m_name = name; }
+
+  bool isReady() const;
+  const Address& readyAddress() const;
+  bool isSet(const Address& address) const { return m_map.exist(address); }
+  void set(const Address& address, Time relative_latency);
+  void unset(const Address& address);
+  void print(ostream& out) const;
+private:
+  // Private Methods
+  void updateNext() const;
+
+  // Private copy constructor and assignment operator
+  TimerTable(const TimerTable& obj);
+  TimerTable& operator=(const TimerTable& obj);
+
+  // Data Members (m_prefix)
+  Map<Address, Time> m_map;
+  Chip* m_chip_ptr;
+  mutable bool m_next_valid;
+  mutable Time m_next_time; // Only valid if m_next_valid is true
+  mutable Address m_next_address;  // Only valid if m_next_valid is true
+  Consumer* m_consumer_ptr;  // Consumer to signal a wakeup()
+  string m_name;
+};
+
+// ******************* Definitions *******************
+
+// Output operator definition
+extern inline
+ostream& operator<<(ostream& out, const TimerTable& obj)
+{
+  obj.print(out);
+  out << flush;
+  return out;
+}
+#endif //TIMERTABLE_H