| /* |
| * 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. |
| */ |
| |
| /* |
| * Router.hh |
| * |
| * Niket Agarwal, Princeton University |
| * |
| * */ |
| |
| #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 |
| |