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-/*
- * 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.
- *
- * Authors: Niket Agarwal
- */
-
-#ifndef ROUTER_H
-#define ROUTER_H
-
-#include "mem/ruby/network/garnet-fixed-pipeline/NetworkHeader.hh"
-#include "mem/ruby/network/garnet-flexible-pipeline/GarnetNetwork.hh"
-#include "mem/ruby/network/garnet-flexible-pipeline/FlexibleConsumer.hh"
-#include "mem/gems_common/PrioHeap.hh"
-#include "mem/ruby/network/garnet-flexible-pipeline/NetworkLink.hh"
-#include "mem/ruby/common/NetDest.hh"
-#include "mem/ruby/network/garnet-flexible-pipeline/flitBuffer.hh"
-#include "mem/ruby/network/garnet-flexible-pipeline/InVcState.hh"
-#include "mem/ruby/network/garnet-flexible-pipeline/OutVcState.hh"
-
-class VCarbiter;
-
-class Router : public FlexibleConsumer {
-public:
- Router(int id, GarnetNetwork *network_ptr);
-
- ~Router();
-
- void addInPort(NetworkLink *in_link);
- void addOutPort(NetworkLink *out_link, const NetDest& routing_table_entry, int link_weight);
- void wakeup();
- void request_vc(int in_vc, int in_port, NetDest destination, Time request_time);
- bool isBufferNotFull(int vc, int inport);
- void grant_vc(int out_port, int vc, Time grant_time);
- void release_vc(int out_port, int vc, Time release_time);
- void vc_arbitrate();
-
- void printConfig(ostream& out) const;
- void print(ostream& out) const;
-
-private:
-/***************Data Members******************/
- int m_id;
- int m_virtual_networks, m_num_vcs, m_vc_per_vnet;
- GarnetNetwork *m_net_ptr;
- Vector<int > m_vc_round_robin; // For scheduling of out source queues
- int m_round_robin_inport, m_round_robin_start; // for vc arbitration
- Vector<int > m_round_robin_invc; // For every outport. for vc arbitration
-
- Vector<Vector<flitBuffer *> > m_router_buffers; // These are essentially output buffers
- Vector<flitBuffer *> m_out_src_queue; // These are source queues for the output link
- Vector<NetworkLink *> m_in_link;
- Vector<NetworkLink *> m_out_link;
- Vector<Vector<InVcState * > > m_in_vc_state;
- Vector<Vector<OutVcState * > > m_out_vc_state;
- Vector<NetDest> m_routing_table;
- Vector<int > m_link_weights;
- VCarbiter *m_vc_arbiter;
-
-/*********** Private methods *************/
- int getRoute(NetDest destination);
- Vector<int > get_valid_vcs(int invc);
- void routeCompute(flit *m_flit, int inport);
- void checkReschedule();
- void check_arbiter_reschedule();
- void scheduleOutputLinks();
-};
-
-#endif
-