OutVcState.cc revision 11666 
17199Sgblack@eecs.umich.edu/*
27199Sgblack@eecs.umich.edu * Copyright (c) 2008 Princeton University
37199Sgblack@eecs.umich.edu * Copyright (c) 2016 Georgia Institute of Technology
47199Sgblack@eecs.umich.edu * All rights reserved.
57199Sgblack@eecs.umich.edu *
67199Sgblack@eecs.umich.edu * Redistribution and use in source and binary forms, with or without
77199Sgblack@eecs.umich.edu * modification, are permitted provided that the following conditions are
87199Sgblack@eecs.umich.edu * met: redistributions of source code must retain the above copyright
97199Sgblack@eecs.umich.edu * notice, this list of conditions and the following disclaimer;
107199Sgblack@eecs.umich.edu * redistributions in binary form must reproduce the above copyright
117199Sgblack@eecs.umich.edu * notice, this list of conditions and the following disclaimer in the
127199Sgblack@eecs.umich.edu * documentation and/or other materials provided with the distribution;
137199Sgblack@eecs.umich.edu * neither the name of the copyright holders nor the names of its
147199Sgblack@eecs.umich.edu * contributors may be used to endorse or promote products derived from
157199Sgblack@eecs.umich.edu * this software without specific prior written permission.
167199Sgblack@eecs.umich.edu *
177199Sgblack@eecs.umich.edu * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
187199Sgblack@eecs.umich.edu * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
197199Sgblack@eecs.umich.edu * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
207199Sgblack@eecs.umich.edu * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
217199Sgblack@eecs.umich.edu * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
227199Sgblack@eecs.umich.edu * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
237199Sgblack@eecs.umich.edu * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
247199Sgblack@eecs.umich.edu * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
257199Sgblack@eecs.umich.edu * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
267199Sgblack@eecs.umich.edu * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
277199Sgblack@eecs.umich.edu * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
287199Sgblack@eecs.umich.edu *
297199Sgblack@eecs.umich.edu * Authors: Niket Agarwal
307199Sgblack@eecs.umich.edu *          Tushar Krishna
317199Sgblack@eecs.umich.edu */
327199Sgblack@eecs.umich.edu
337199Sgblack@eecs.umich.edu
347199Sgblack@eecs.umich.edu#include "mem/ruby/network/garnet2.0/OutVcState.hh"
357199Sgblack@eecs.umich.edu
367199Sgblack@eecs.umich.edu#include "mem/ruby/system/RubySystem.hh"
377199Sgblack@eecs.umich.edu
387199Sgblack@eecs.umich.eduOutVcState::OutVcState(int id, GarnetNetwork *network_ptr)
397199Sgblack@eecs.umich.edu    : m_time(0)
407199Sgblack@eecs.umich.edu{
417199Sgblack@eecs.umich.edu    m_id = id;
427199Sgblack@eecs.umich.edu    m_vc_state = IDLE_;
437199Sgblack@eecs.umich.edu
447199Sgblack@eecs.umich.edu    if (network_ptr->get_vnet_type(id) == DATA_VNET_)
457199Sgblack@eecs.umich.edu        m_max_credit_count = network_ptr->getBuffersPerDataVC();
467199Sgblack@eecs.umich.edu    else
477199Sgblack@eecs.umich.edu        m_max_credit_count = network_ptr->getBuffersPerCtrlVC();
487199Sgblack@eecs.umich.edu
497199Sgblack@eecs.umich.edu    m_credit_count = m_max_credit_count;
507199Sgblack@eecs.umich.edu    assert(m_credit_count >= 1);
517199Sgblack@eecs.umich.edu}
527199Sgblack@eecs.umich.edu
537199Sgblack@eecs.umich.eduvoid
547199Sgblack@eecs.umich.eduOutVcState::increment_credit()
557199Sgblack@eecs.umich.edu{
567199Sgblack@eecs.umich.edu    m_credit_count++;
577199Sgblack@eecs.umich.edu    assert(m_credit_count <= m_max_credit_count);
58}
59
60void
61OutVcState::decrement_credit()
62{
63    m_credit_count--;
64    assert(m_credit_count >= 0);
65}
66