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diff --git a/src/mem/ruby/network/garnet2.0/CrossbarSwitch.hh b/src/mem/ruby/network/garnet2.0/CrossbarSwitch.hh
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+/*
+ * Copyright (c) 2008 Princeton University
+ * Copyright (c) 2016 Georgia Institute of Technology
+ * 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.
+ *
+ * Authors: Niket Agarwal
+ *          Tushar Krishna
+ */
+
+
+#ifndef __MEM_RUBY_NETWORK_GARNET_CROSSBAR_SWITCH_HH__
+#define __MEM_RUBY_NETWORK_GARNET_CROSSBAR_SWITCH_HH__
+
+#include <iostream>
+#include <vector>
+
+#include "mem/ruby/common/Consumer.hh"
+#include "mem/ruby/network/garnet2.0/CommonTypes.hh"
+#include "mem/ruby/network/garnet2.0/flitBuffer.hh"
+
+class Router;
+class OutputUnit;
+
+class CrossbarSwitch : public Consumer
+{
+  public:
+    CrossbarSwitch(Router *router);
+    ~CrossbarSwitch();
+    void wakeup();
+    void init();
+    void print(std::ostream& out) const {};
+
+    inline void update_sw_winner(int inport, flit *t_flit)
+    { m_switch_buffer[inport]->insert(t_flit); }
+
+    inline double get_crossbar_activity() { return m_crossbar_activity; }
+
+    uint32_t functionalWrite(Packet *pkt);
+
+  private:
+    int m_num_vcs;
+    int m_num_inports;
+    double m_crossbar_activity;
+    Router *m_router;
+    std::vector<flitBuffer *> m_switch_buffer;
+    std::vector<OutputUnit *> m_output_unit;
+};
+
+#endif // __MEM_RUBY_NETWORK_GARNET_CROSSBAR_SWITCH_HH__