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

   1 /*
   2  * Copyright (c) 2020 Advanced Micro Devices, Inc.
   3  * Copyright (c) 2008 Princeton University
   4  * Copyright (c) 2016 Georgia Institute of Technology
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions are
   9  * met: redistributions of source code must retain the above copyright
  10  * notice, this list of conditions and the following disclaimer;
  11  * redistributions in binary form must reproduce the above copyright
  12  * notice, this list of conditions and the following disclaimer in the
  13  * documentation and/or other materials provided with the distribution;
  14  * neither the name of the copyright holders nor the names of its
  15  * contributors may be used to endorse or promote products derived from
  16  * this software without specific prior written permission.
  17  *
  18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  19  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  20  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  21  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  22  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  23  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  24  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  25  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  26  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  27  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  28  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  29  */
  30
  31
  32 #include "mem/ruby/network/garnet2.0/flitBuffer.hh"
  33
  34 flitBuffer::flitBuffer()
  35 {
  36     max_size = INFINITE_;
  37 }
  38
  39 flitBuffer::flitBuffer(int maximum_size)
  40 {
  41     max_size = maximum_size;
  42 }
  43
  44 bool
  45 flitBuffer::isEmpty()
  46 {
  47     return (m_buffer.size() == 0);
  48 }
  49
  50 bool
  51 flitBuffer::isReady(Tick curTime)
  52 {
  53     if (m_buffer.size() != 0 ) {
  54         flit *t_flit = peekTopFlit();
  55         if (t_flit->get_time() <= curTime)
  56             return true;
  57     }
  58     return false;
  59 }
  60
  61 void
  62 flitBuffer::print(std::ostream& out) const
  63 {
  64     out << "[flitBuffer: " << m_buffer.size() << "] " << std::endl;
  65 }
  66
  67 bool
  68 flitBuffer::isFull()
  69 {
  70     return (m_buffer.size() >= max_size);
  71 }
  72
  73 void
  74 flitBuffer::setMaxSize(int maximum)
  75 {
  76     max_size = maximum;
  77 }
  78
  79 uint32_t
  80 flitBuffer::functionalWrite(Packet *pkt)
  81 {
  82     uint32_t num_functional_writes = 0;
  83
  84     for (unsigned int i = 0; i < m_buffer.size(); ++i) {
  85         if (m_buffer[i]->functionalWrite(pkt)) {
  86             num_functional_writes++;
  87         }
  88     }
  89
  90     return num_functional_writes;
  91 }