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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
*/
#include "mem/ruby/network/garnet2.0/VirtualChannel.hh"
VirtualChannel::VirtualChannel(int id)
: m_enqueue_time(INFINITE_)
{
m_id = id;
m_input_buffer = new flitBuffer();
m_vc_state.first = IDLE_;
m_vc_state.second = Cycles(0);
m_output_vc = -1;
m_output_port = -1;
}
VirtualChannel::~VirtualChannel()
{
delete m_input_buffer;
}
void
VirtualChannel::set_idle(Cycles curTime)
{
m_vc_state.first = IDLE_;
m_vc_state.second = curTime;
m_enqueue_time = Cycles(INFINITE_);
m_output_port = -1;
m_output_vc = -1;
}
void
VirtualChannel::set_active(Cycles curTime)
{
m_vc_state.first = ACTIVE_;
m_vc_state.second = curTime;
m_enqueue_time = curTime;
}
bool
VirtualChannel::need_stage(flit_stage stage, Cycles time)
{
if (m_input_buffer->isReady(time)) {
assert(m_vc_state.first == ACTIVE_ && m_vc_state.second <= time);
flit *t_flit = m_input_buffer->peekTopFlit();
return(t_flit->is_stage(stage, time));
}
return false;
}
uint32_t
VirtualChannel::functionalWrite(Packet *pkt)
{
return m_input_buffer->functionalWrite(pkt);
}
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