gem5/src/mem/mport.cc

/*
 * Copyright (c) 2008 The Regents of The University of Michigan
 * 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.
 *
 * Authors: Gabe Black
 */

#include "mem/mport.hh"

Tick
MessagePort::recvAtomic(PacketPtr pkt)
{
    if (pkt->cmd == MemCmd::MessageReq) {
        // We received a message.
        return recvMessage(pkt);
    } else if (pkt->cmd == MemCmd::MessageResp) {
        return recvResponse(pkt);
    } else if (pkt->wasNacked()) {
        return recvNack(pkt);
    } else if (pkt->isError()) {
        panic("Packet is error.\n");
    } else {
        panic("Unexpected memory command %s.\n", pkt->cmd.toString());
    }
}

void
MessagePort::sendMessageTiming(PacketPtr pkt, Tick latency)
{
    schedSendTiming(pkt, curTick + latency);
}

Tick
MessagePort::sendMessageAtomic(PacketPtr pkt)
{
    Tick latency = sendAtomic(pkt);
    assert(pkt->isResponse());
    latency += recvResponse(pkt);
    return latency;
}