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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
*/
#include "mem/ruby/network/garnet/fixed-pipeline/VirtualChannel_d.hh"
VirtualChannel_d::VirtualChannel_d(int id)
{
m_id = id;
m_input_buffer = new flitBuffer_d();
m_vc_state.first = IDLE_;
m_vc_state.second = g_eventQueue_ptr->getTime();
m_enqueue_time = INFINITE_;
}
VirtualChannel_d::~VirtualChannel_d()
{
delete m_input_buffer;
}
void VirtualChannel_d::set_outport(int outport)
{
route = outport;
}
void VirtualChannel_d::grant_vc(int out_vc)
{
m_output_vc = out_vc;
m_vc_state.first = ACTIVE_;
m_vc_state.second = g_eventQueue_ptr->getTime() + 1;
flit_d *t_flit = m_input_buffer->peekTopFlit();
t_flit->advance_stage(SA_);
}
bool VirtualChannel_d::need_stage(VC_state_type state, flit_stage stage)
{
if((m_vc_state.first == state) && (g_eventQueue_ptr->getTime() >= m_vc_state.second))
{
if(m_input_buffer->isReady())
{
flit_d *t_flit = m_input_buffer->peekTopFlit();
return(t_flit->is_stage(stage)) ;
}
}
return false;
}
bool VirtualChannel_d::need_stage_nextcycle(VC_state_type state, flit_stage stage)
{
if((m_vc_state.first == state) && ((g_eventQueue_ptr->getTime()+1) >= m_vc_state.second))
{
if(m_input_buffer->isReadyForNext())
{
flit_d *t_flit = m_input_buffer->peekTopFlit();
return(t_flit->is_next_stage(stage)) ;
}
}
return false;
}
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