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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_OUTPUT_UNIT_HH__
#define __MEM_RUBY_NETWORK_GARNET_OUTPUT_UNIT_HH__
#include <iostream>
#include <vector>
#include "mem/ruby/common/Consumer.hh"
#include "mem/ruby/network/garnet2.0/CommonTypes.hh"
#include "mem/ruby/network/garnet2.0/CreditLink.hh"
#include "mem/ruby/network/garnet2.0/NetworkLink.hh"
#include "mem/ruby/network/garnet2.0/OutVcState.hh"
#include "mem/ruby/network/garnet2.0/Router.hh"
#include "mem/ruby/network/garnet2.0/flitBuffer.hh"
class OutputUnit : public Consumer
{
public:
OutputUnit(int id, PortDirection direction, Router *router);
~OutputUnit();
void set_out_link(NetworkLink *link);
void set_credit_link(CreditLink *credit_link);
void wakeup();
flitBuffer* getOutQueue();
void print(std::ostream& out) const {};
void decrement_credit(int out_vc);
void increment_credit(int out_vc);
bool has_credit(int out_vc);
bool has_free_vc(int vnet);
int select_free_vc(int vnet);
inline PortDirection get_direction() { return m_direction; }
int
get_credit_count(int vc)
{
return m_outvc_state[vc]->get_credit_count();
}
inline int
get_outlink_id()
{
return m_out_link->get_id();
}
inline void
set_vc_state(VC_state_type state, int vc, Cycles curTime)
{
m_outvc_state[vc]->setState(state, curTime);
}
inline bool
is_vc_idle(int vc, Cycles curTime)
{
return (m_outvc_state[vc]->isInState(IDLE_, curTime));
}
inline void
insert_flit(flit *t_flit)
{
m_out_buffer->insert(t_flit);
m_out_link->scheduleEventAbsolute(m_router->clockEdge(Cycles(1)));
}
uint32_t functionalWrite(Packet *pkt);
private:
int m_id;
PortDirection m_direction;
int m_num_vcs;
int m_vc_per_vnet;
Router *m_router;
NetworkLink *m_out_link;
CreditLink *m_credit_link;
flitBuffer *m_out_buffer; // This is for the network link to consume
std::vector<OutVcState *> m_outvc_state; // vc state of downstream router
};
#endif // __MEM_RUBY_NETWORK_GARNET_OUTPUT_UNIT_HH__
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