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diff --git a/src/mem/ruby/network/garnet-fixed-pipeline/OutputUnit_d.hh b/src/mem/ruby/network/garnet-fixed-pipeline/OutputUnit_d.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.
+ */
+
+/*
+ * OutputUnit_d.h
+ *
+ * Niket Agarwal, Princeton University
+ *
+ * */
+
+#ifndef OUTPUT_UNIT_D_H
+#define OUTPUT_UNIT_D_H
+
+#include "NetworkHeader.hh"
+#include "Consumer.hh"
+#include "flitBuffer_d.hh"
+#include "OutVcState_d.hh"
+#include "NetworkLink_d.hh"
+#include "CreditLink_d.hh"
+
+class Router_d;
+
+class OutputUnit_d : public Consumer {
+public:
+        OutputUnit_d(int id, Router_d *router);
+        ~OutputUnit_d();
+        void set_out_link(NetworkLink_d *link);
+        void set_credit_link(CreditLink_d *credit_link);
+        void wakeup();
+        flitBuffer_d* getOutQueue();
+        void printConfig(ostream& out);
+        void update_vc(int vc, int in_port, int in_vc);
+        void print(ostream& out) const {};
+        int get_credit_cnt(int vc) { return m_outvc_state[vc]->get_credit_count(); }
+        void decrement_credit(int out_vc);
+
+        inline int get_outlink_id()
+        {
+                return m_out_link->get_id();
+        }
+
+        inline void set_vc_state(VC_state_type state, int vc)
+        {
+                m_outvc_state[vc]->setState(state, g_eventQueue_ptr->getTime() + 1);
+        }
+        inline bool is_vc_idle(int vc)
+        {
+                return (m_outvc_state[vc]->isInState(IDLE_, g_eventQueue_ptr->getTime())        );
+        }
+        inline void insert_flit(flit_d *t_flit)
+        {
+                m_out_buffer->insert(t_flit);
+                g_eventQueue_ptr->scheduleEvent(m_out_link, 1);
+        }
+
+
+
+private:
+        int m_id;
+        int m_num_vcs;
+        Router_d *m_router;
+        NetworkLink_d *m_out_link;
+        CreditLink_d *m_credit_link;
+
+        flitBuffer_d *m_out_buffer; // This is for the network link to consume
+        Vector<OutVcState_d *> m_outvc_state; // vc state of downstream router
+
+};
+
+#endif