4d8ea8dc47
into zeep.pool:/z/saidi/work/m5.newmem --HG-- extra : convert_revision : ebd55fc18b09821712f73867c93bd3d888e7788c
242 lines
6.4 KiB
C++
242 lines
6.4 KiB
C++
/*
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* Copyright (c) 2006 The Regents of The University of Michigan
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met: redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer;
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* redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution;
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* neither the name of the copyright holders nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "base/trace.hh"
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#include "dev/io_device.hh"
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#include "sim/builder.hh"
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PioPort::PioPort(PioDevice *dev, Platform *p)
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: Port(dev->name() + "-pioport"), device(dev), platform(p)
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{ }
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Tick
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PioPort::recvAtomic(Packet *pkt)
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{
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return device->recvAtomic(pkt);
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}
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void
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PioPort::recvFunctional(Packet *pkt)
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{
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device->recvAtomic(pkt);
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}
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void
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PioPort::getDeviceAddressRanges(AddrRangeList &resp, AddrRangeList &snoop)
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{
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snoop.clear();
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device->addressRanges(resp);
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}
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void
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PioPort::recvRetry()
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{
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Packet* pkt = transmitList.front();
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if (Port::sendTiming(pkt)) {
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transmitList.pop_front();
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}
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}
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void
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PioPort::SendEvent::process()
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{
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if (port->Port::sendTiming(packet))
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return;
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port->transmitList.push_back(packet);
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}
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bool
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PioPort::recvTiming(Packet *pkt)
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{
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Tick latency = device->recvAtomic(pkt);
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// turn packet around to go back to requester
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pkt->makeTimingResponse();
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sendTiming(pkt, latency);
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return true;
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}
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PioDevice::~PioDevice()
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{
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if (pioPort)
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delete pioPort;
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}
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void
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PioDevice::init()
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{
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if (!pioPort)
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panic("Pio port not connected to anything!");
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pioPort->sendStatusChange(Port::RangeChange);
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}
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void
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BasicPioDevice::addressRanges(AddrRangeList &range_list)
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{
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assert(pioSize != 0);
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range_list.clear();
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range_list.push_back(RangeSize(pioAddr, pioSize));
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}
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DmaPort::DmaPort(DmaDevice *dev, Platform *p)
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: Port(dev->name() + "-dmaport"), device(dev), platform(p), pendingCount(0)
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{ }
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bool
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DmaPort::recvTiming(Packet *pkt)
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{
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if (pkt->senderState) {
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DmaReqState *state;
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DPRINTF(DMA, "Received response Packet %#x with senderState: %#x\n",
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pkt, pkt->senderState);
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state = dynamic_cast<DmaReqState*>(pkt->senderState);
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assert(state);
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state->completionEvent->process();
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delete pkt->req;
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delete pkt;
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} else {
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DPRINTF(DMA, "Received response Packet %#x with no senderState\n", pkt);
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delete pkt->req;
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delete pkt;
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}
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return true;
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}
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DmaDevice::DmaDevice(Params *p)
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: PioDevice(p), dmaPort(NULL)
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{ }
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void
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DmaPort::recvRetry()
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{
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Packet* pkt = transmitList.front();
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bool result = true;
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while (result && transmitList.size()) {
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DPRINTF(DMA, "Retry on Packet %#x with senderState: %#x\n",
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pkt, pkt->senderState);
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result = sendTiming(pkt);
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if (result) {
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DPRINTF(DMA, "-- Done\n");
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transmitList.pop_front();
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pendingCount--;
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assert(pendingCount >= 0);
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} else {
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DPRINTF(DMA, "-- Failed, queued\n");
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}
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}
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}
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void
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DmaPort::dmaAction(Packet::Command cmd, Addr addr, int size, Event *event,
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uint8_t *data)
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{
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assert(event);
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int prevSize = 0;
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for (ChunkGenerator gen(addr, size, peerBlockSize());
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!gen.done(); gen.next()) {
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Request *req = new Request(gen.addr(), gen.size(), 0);
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Packet *pkt = new Packet(req, cmd, Packet::Broadcast);
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// Increment the data pointer on a write
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if (data)
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pkt->dataStatic(data + prevSize);
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prevSize += gen.size();
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// Set the last bit of the dma as the final packet for this dma
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// and set it's completion event.
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if (prevSize == size) {
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pkt->senderState = new DmaReqState(event, true);
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}
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assert(pendingCount >= 0);
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pendingCount++;
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sendDma(pkt);
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}
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}
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void
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DmaPort::sendDma(Packet *pkt)
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{
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// some kind of selction between access methods
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// more work is going to have to be done to make
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// switching actually work
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/* MemState state = device->platform->system->memState;
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if (state == Timing) { */
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DPRINTF(DMA, "Attempting to send Packet %#x with senderState: %#x\n",
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pkt, pkt->senderState);
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if (transmitList.size() || !sendTiming(pkt)) {
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transmitList.push_back(pkt);
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DPRINTF(DMA, "-- Failed: queued\n");
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} else {
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DPRINTF(DMA, "-- Done\n");
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pendingCount--;
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assert(pendingCount >= 0);
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}
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/* } else if (state == Atomic) {
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sendAtomic(pkt);
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if (pkt->senderState) {
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DmaReqState *state = dynamic_cast<DmaReqState*>(pkt->senderState);
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assert(state);
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state->completionEvent->schedule(curTick + (pkt->time - pkt->req->getTime()) +1);
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}
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pendingCount--;
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assert(pendingCount >= 0);
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delete pkt->req;
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delete pkt;
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} else if (state == Functional) {
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sendFunctional(pkt);
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// Is this correct???
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completionEvent->schedule(pkt->req->responseTime - pkt->req->requestTime);
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completionEvent == NULL;
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} else
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panic("Unknown memory command state.");
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*/
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}
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DmaDevice::~DmaDevice()
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{
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if (dmaPort)
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delete dmaPort;
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}
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