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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 VC_ALLOCATOR_D_H
#define VC_ALLOCATOR_D_H
#include <iostream>
#include <utility>
#include "mem/ruby/network/garnet/NetworkHeader.hh"
#include "mem/ruby/common/Consumer.hh"
class Router_d;
class InputUnit_d;
class OutputUnit_d;
class VCallocator_d : public Consumer {
public:
VCallocator_d(Router_d *router);
void init();
void wakeup();
void check_for_wakeup();
void clear_request_vector();
int get_vnet(int invc);
void print(std::ostream& out) const {};
void arbitrate_invcs();
void arbitrate_outvcs();
bool is_invc_candidate(int inport_iter, int invc_iter);
void select_outvc(int inport_iter, int invc_iter);
inline double get_local_arbit_count()
{
return m_local_arbiter_activity;
}
inline double get_global_arbit_count()
{
return m_global_arbiter_activity;
}
private:
int m_num_vcs, m_vc_per_vnet;
int m_num_inports;
int m_num_outports;
double m_local_arbiter_activity, m_global_arbiter_activity;
Router_d *m_router;
Vector<Vector <int > > m_round_robin_invc; // First stage of arbitration where all vcs select an output vc to content for
Vector<Vector <std::pair<int, int> > > m_round_robin_outvc; // Arbiter for every output vc
Vector<Vector<Vector<Vector<bool > > > > m_outvc_req; // [outport][outvc][inpotr][invc]. set true in the first phase of allocation
Vector<Vector<bool > > m_outvc_is_req;
Vector<InputUnit_d *> m_input_unit ;
Vector<OutputUnit_d *> m_output_unit ;
};
#endif
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