VirtualChannel.cc

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/*
 * Copyright (c) 2020 Inria
 * Copyright (c) 2016 Georgia Institute of Technology
 * Copyright (c) 2008 Princeton University
 * 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
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 * 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
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#include "mem/ruby/network/garnet/VirtualChannel.hh"
 
VirtualChannel::VirtualChannel()
  : inputBuffer(), m_vc_state(IDLE_, Tick(0)), m_output_port(-1),
    m_enqueue_time(INFINITE_), m_output_vc(-1)
{
}
 
void
VirtualChannel::set_idle(Tick curTime)
{
    m_vc_state.first = IDLE_;
    m_vc_state.second = curTime;
    m_enqueue_time = Tick(INFINITE_);
    m_output_port = -1;
    m_output_vc = -1;
}
 
void
VirtualChannel::set_active(Tick curTime)
{
    m_vc_state.first = ACTIVE_;
    m_vc_state.second = curTime;
    m_enqueue_time = curTime;
}
 
bool
VirtualChannel::need_stage(flit_stage stage, Tick time)
{
    if (inputBuffer.isReady(time)) {
        assert(m_vc_state.first == ACTIVE_ && m_vc_state.second <= time);
        flit *t_flit = inputBuffer.peekTopFlit();
        return(t_flit->is_stage(stage, time));
    }
    return false;
}
 
uint32_t
VirtualChannel::functionalWrite(Packet *pkt)
{
    return inputBuffer.functionalWrite(pkt);
}