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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_ROUTING_UNIT_HH__
#define __MEM_RUBY_NETWORK_GARNET_ROUTING_UNIT_HH__
#include "mem/ruby/common/Consumer.hh"
#include "mem/ruby/common/NetDest.hh"
#include "mem/ruby/network/garnet2.0/CommonTypes.hh"
#include "mem/ruby/network/garnet2.0/GarnetNetwork.hh"
#include "mem/ruby/network/garnet2.0/flit.hh"
class InputUnit;
class Router;
class RoutingUnit
{
public:
RoutingUnit(Router *router);
int outportCompute(RouteInfo route,
int inport,
PortDirection inport_dirn);
// Topology-agnostic Routing Table based routing (default)
void addRoute(const NetDest& routing_table_entry);
void addWeight(int link_weight);
// get output port from routing table
int lookupRoutingTable(int vnet, NetDest net_dest);
// Topology-specific direction based routing
void addInDirection(PortDirection inport_dirn, int inport);
void addOutDirection(PortDirection outport_dirn, int outport);
// Routing for Mesh
int outportComputeXY(RouteInfo route,
int inport,
PortDirection inport_dirn);
// Custom Routing Algorithm using Port Directions
int outportComputeCustom(RouteInfo route,
int inport,
PortDirection inport_dirn);
private:
Router *m_router;
// Routing Table
std::vector<NetDest> m_routing_table;
std::vector<int> m_weight_table;
// Inport and Outport direction to idx maps
std::map<PortDirection, int> m_inports_dirn2idx;
std::map<int, PortDirection> m_inports_idx2dirn;
std::map<int, PortDirection> m_outports_idx2dirn;
std::map<PortDirection, int> m_outports_dirn2idx;
};
#endif // __MEM_RUBY_NETWORK_GARNET_ROUTING_UNIT_HH__
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