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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_SWITCH_ALLOCATOR_HH__
#define __MEM_RUBY_NETWORK_GARNET_SWITCH_ALLOCATOR_HH__
#include <iostream>
#include <vector>
#include "mem/ruby/common/Consumer.hh"
#include "mem/ruby/network/garnet2.0/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
std::vector<InputUnit *> m_input_unit;
std::vector<OutputUnit *> m_output_unit;
};
#endif // __MEM_RUBY_NETWORK_GARNET_SWITCH_ALLOCATOR_HH__
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