/*
 * 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.
 */

#ifndef __MEM_RUBY_NETWORK_SIMPLE_SIMPLENETWORK_HH__
#define __MEM_RUBY_NETWORK_SIMPLE_SIMPLENETWORK_HH__

#include <iostream>
#include <vector>

#include "mem/ruby/common/Global.hh"
#include "mem/ruby/network/Network.hh"
#include "params/SimpleNetwork.hh"
#include "sim/sim_object.hh"

class NetDest;
class MessageBuffer;
class Throttle;
class Switch;
class Topology;

class SimpleNetwork : public Network
{
  public:
    typedef SimpleNetworkParams Params;
    SimpleNetwork(const Params *p);
    ~SimpleNetwork();

    void init();

    int getBufferSize() { return m_buffer_size; }
    int getEndpointBandwidth() { return m_endpoint_bandwidth; }
    bool getAdaptiveRouting() {return m_adaptive_routing; }

    void printStats(std::ostream& out) const;
    void clearStats();
    void reset();

    // returns the queue requested for the given component
    MessageBuffer* getToNetQueue(NodeID id, bool ordered, int network_num, std::string vnet_type);
    MessageBuffer* getFromNetQueue(NodeID id, bool ordered, int network_num, std::string vnet_type);
    virtual const std::vector<Throttle*>* getThrottles(NodeID id) const;

    bool isVNetOrdered(int vnet) { return m_ordered[vnet]; }
    bool validVirtualNetwork(int vnet) { return m_in_use[vnet]; }

    int getNumNodes() {return m_nodes; }

    // Methods used by Topology to setup the network
    void makeOutLink(SwitchID src, NodeID dest, BasicLink* link, 
                     LinkDirection direction, 
                     const NetDest& routing_table_entry, 
                     bool isReconfiguration);
    void makeInLink(NodeID src, SwitchID dest, BasicLink* link, 
                    LinkDirection direction, 
                    const NetDest& routing_table_entry, 
                    bool isReconfiguration);
    void makeInternalLink(SwitchID src, SwitchID dest, BasicLink* link,
                          LinkDirection direction, 
                          const NetDest& routing_table_entry, 
                          bool isReconfiguration);

    void print(std::ostream& out) const;

  private:
    void checkNetworkAllocation(NodeID id, bool ordered, int network_num);
    void addLink(SwitchID src, SwitchID dest, int link_latency);
    void makeLink(SwitchID src, SwitchID dest,
        const NetDest& routing_table_entry, int link_latency);
    SwitchID createSwitch();
    void makeTopology();
    void linkTopology();

    // Private copy constructor and assignment operator
    SimpleNetwork(const SimpleNetwork& obj);
    SimpleNetwork& operator=(const SimpleNetwork& obj);

    // vector of queues from the components
    std::vector<std::vector<MessageBuffer*> > m_toNetQueues;
    std::vector<std::vector<MessageBuffer*> > m_fromNetQueues;

    std::vector<bool> m_in_use;
    std::vector<bool> m_ordered;
    std::vector<Switch*> m_switch_ptr_vector;
    std::vector<MessageBuffer*> m_buffers_to_free;
    std::vector<Switch*> m_endpoint_switches;

    int m_buffer_size;
    int m_endpoint_bandwidth;
    bool m_adaptive_routing;    
};

inline std::ostream&
operator<<(std::ostream& out, const SimpleNetwork& obj)
{
    obj.print(out);
    out << std::flush;
    return out;
}

#endif // __MEM_RUBY_NETWORK_SIMPLE_SIMPLENETWORK_HH__
