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/*
* Copyright (c) 1999-2008 Mark D. Hill and David A. Wood
* 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.
*/
/*
* Switch_d.C
*
* Niket Agarwal, Princeton University
*
* */
#include "mem/ruby/network/garnet-fixed-pipeline/Switch_d.hh"
#include "mem/ruby/network/garnet-fixed-pipeline/Router_d.hh"
#include "mem/ruby/network/garnet-fixed-pipeline/OutputUnit_d.hh"
Switch_d::Switch_d(Router_d *router)
{
m_router = router;
m_num_vcs = m_router->get_num_vcs();
m_crossbar_activity = 0;
}
Switch_d::~Switch_d()
{
m_switch_buffer.deletePointers();
}
void Switch_d::init()
{
m_output_unit = m_router->get_outputUnit_ref();
m_num_inports = m_router->get_num_inports();
m_switch_buffer.setSize(m_num_inports);
for(int i = 0; i < m_num_inports; i++)
{
m_switch_buffer[i] = new flitBuffer_d();
}
}
void Switch_d::wakeup()
{
DEBUG_MSG(NETWORK_COMP, HighPrio, "Switch woke up");
DEBUG_EXPR(NETWORK_COMP, HighPrio, g_eventQueue_ptr->getTime());
for(int inport = 0; inport < m_num_inports; inport++)
{
if(!m_switch_buffer[inport]->isReady())
continue;
flit_d *t_flit = m_switch_buffer[inport]->peekTopFlit();
if(t_flit->is_stage(ST_))
{
int outport = t_flit->get_outport();
t_flit->advance_stage(LT_);
t_flit->set_time(g_eventQueue_ptr->getTime() + 1);
m_output_unit[outport]->insert_flit(t_flit); // This will take care of waking up the Network Link
m_switch_buffer[inport]->getTopFlit();
m_crossbar_activity++;
}
}
check_for_wakeup();
}
void Switch_d::check_for_wakeup()
{
for(int inport = 0; inport < m_num_inports; inport++)
{
if(m_switch_buffer[inport]->isReadyForNext())
{
g_eventQueue_ptr->scheduleEvent(this, 1);
break;
}
}
}
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