text: /*
   * Copyright (c) 2020 Inria
   * Copyright (c) 2016 Georgia Institute of Technology
   * Copyright (c) 2008 Princeton University
   * 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.
   */
  
  
  #ifndef __MEM_RUBY_NETWORK_GARNET_0_SWITCHALLOCATOR_HH__
  #define __MEM_RUBY_NETWORK_GARNET_0_SWITCHALLOCATOR_HH__
  
  #include <iostream>
  #include <vector>
  
  #include "mem/ruby/common/Consumer.hh"
  #include "mem/ruby/network/garnet/CommonTypes.hh"
  
  class Router;
  class InputUnit;
  class OutputUnit;
  
  class SwitchAllocator : public Consumer
  {
    public:
      SwitchAllocator(Router *router);
      void wakeup();
      void init();
      void clear_request_vector();
      void check_for_wakeup();
      int get_vnet (int invc);
      void print(std::ostream& out) const {};
      void arbitrate_inports();
      void arbitrate_outports();
      bool send_allowed(int inport, int invc, int outport, int outvc);
      int vc_allocate(int outport, int inport, int invc);
  
      inline double
      get_input_arbiter_activity()
      {
          return m_input_arbiter_activity;
      }
      inline double
      get_output_arbiter_activity()
      {
          return m_output_arbiter_activity;
      }
  
      void resetStats();
  
    private:
      int m_num_inports, m_num_outports;
      int m_num_vcs, m_vc_per_vnet;
  
      double m_input_arbiter_activity, m_output_arbiter_activity;
  
      Router *m_router;
      std::vector<int> m_round_robin_invc;
      std::vector<int> m_round_robin_inport;
      std::vector<std::vector<bool>> m_port_requests;
      std::vector<std::vector<int>> m_vc_winners; // a list for each outport
  };
  
  #endif // __MEM_RUBY_NETWORK_GARNET_0_SWITCHALLOCATOR_HH__
  