blob: 74d66111dd08577a631a5eb831e0efe7c242d796 [file] [log] [blame]
/*
* 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.
*/
#include "mem/ruby/network/garnet/Credit.hh"
#include "base/trace.hh"
#include "debug/RubyNetwork.hh"
namespace gem5
{
namespace ruby
{
namespace garnet
{
// Credit Signal for buffers inside VC
// Carries m_vc (inherits from flit.hh)
// and m_is_free_signal (whether VC is free or not)
Credit::Credit(int vc, bool is_free_signal, Tick curTime)
: flit(0, 0, vc, 0, RouteInfo(), 0, nullptr, 0, 0, curTime)
{
m_is_free_signal = is_free_signal;
m_type = CREDIT_;
}
flit *
Credit::serialize(int ser_id, int parts, uint32_t bWidth)
{
DPRINTF(RubyNetwork, "Serializing a credit\n");
bool new_free = false;
if ((ser_id+1 == parts) && m_is_free_signal) {
new_free = true;
}
Credit *new_credit_flit = new Credit(m_vc, new_free, m_time);
return new_credit_flit;
}
flit *
Credit::deserialize(int des_id, int num_flits, uint32_t bWidth)
{
DPRINTF(RubyNetwork, "DeSerializing a credit vc:%d free:%d\n",
m_vc, m_is_free_signal);
if (m_is_free_signal) {
// We are not going to get anymore credits for this vc
// So send a credit in any case
return new Credit(m_vc, true, m_time);
}
return new Credit(m_vc, false, m_time);
}
void
Credit::print(std::ostream& out) const
{
out << "[Credit:: ";
out << "Type=" << m_type << " ";
out << "VC=" << m_vc << " ";
out << "FreeVC=" << m_is_free_signal << " ";
out << "Set Time=" << m_time << " ";
out << "]";
}
} // namespace garnet
} // namespace ruby
} // namespace gem5