src/mem/ruby/network/garnet2.0/flitBuffer.cc

   1 /*
   2  * Copyright (c) 2008 Princeton University
   3  * Copyright (c) 2016 Georgia Institute of Technology
   4  * All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions are
   8  * met: redistributions of source code must retain the above copyright
   9  * notice, this list of conditions and the following disclaimer;
  10  * redistributions in binary form must reproduce the above copyright
  11  * notice, this list of conditions and the following disclaimer in the
  12  * documentation and/or other materials provided with the distribution;
  13  * neither the name of the copyright holders nor the names of its
  14  * contributors may be used to endorse or promote products derived from
  15  * this software without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  18  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  19  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  20  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  21  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  22  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  23  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  24  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  25  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  26  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  27  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  28  *
  29  * Authors: Niket Agarwal
  30  *          Tushar Krishna
  31  */
  32
  33
  34 #include "mem/ruby/network/garnet2.0/flitBuffer.hh"
  35
  36 flitBuffer::flitBuffer()
  37 {
  38     max_size = INFINITE_;
  39 }
  40
  41 flitBuffer::flitBuffer(int maximum_size)
  42 {
  43     max_size = maximum_size;
  44 }
  45
  46 bool
  47 flitBuffer::isEmpty()
  48 {
  49     return (m_buffer.size() == 0);
  50 }
  51
  52 bool
  53 flitBuffer::isReady(Cycles curTime)
  54 {
  55     if (m_buffer.size() != 0 ) {
  56         flit *t_flit = peekTopFlit();
  57         if (t_flit->get_time() <= curTime)
  58             return true;
  59     }
  60     return false;
  61 }
  62
  63 void
  64 flitBuffer::print(std::ostream& out) const
  65 {
  66     out << "[flitBuffer: " << m_buffer.size() << "] " << std::endl;
  67 }
  68
  69 bool
  70 flitBuffer::isFull()
  71 {
  72     return (m_buffer.size() >= max_size);
  73 }
  74
  75 void
  76 flitBuffer::setMaxSize(int maximum)
  77 {
  78     max_size = maximum;
  79 }
  80
  81 uint32_t
  82 flitBuffer::functionalWrite(Packet *pkt)
  83 {
  84     uint32_t num_functional_writes = 0;
  85
  86     for (unsigned int i = 0; i < m_buffer.size(); ++i) {
  87         if (m_buffer[i]->functionalWrite(pkt)) {
  88             num_functional_writes++;
  89         }
  90     }
  91
  92     return num_functional_writes;
  93 }