io_device.cc revision 8851
1545SN/A/* 22512SN/A * Copyright (c) 2006 The Regents of The University of Michigan 3545SN/A * All rights reserved. 4545SN/A * 5545SN/A * Redistribution and use in source and binary forms, with or without 6545SN/A * modification, are permitted provided that the following conditions are 7545SN/A * met: redistributions of source code must retain the above copyright 8545SN/A * notice, this list of conditions and the following disclaimer; 9545SN/A * redistributions in binary form must reproduce the above copyright 10545SN/A * notice, this list of conditions and the following disclaimer in the 11545SN/A * documentation and/or other materials provided with the distribution; 12545SN/A * neither the name of the copyright holders nor the names of its 13545SN/A * contributors may be used to endorse or promote products derived from 14545SN/A * this software without specific prior written permission. 15545SN/A * 16545SN/A * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17545SN/A * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18545SN/A * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 19545SN/A * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 20545SN/A * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 21545SN/A * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 22545SN/A * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23545SN/A * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24545SN/A * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25545SN/A * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 26545SN/A * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 272665Ssaidi@eecs.umich.edu * 282665Ssaidi@eecs.umich.edu * Authors: Ali Saidi 292665Ssaidi@eecs.umich.edu * Nathan Binkert 30545SN/A */ 31545SN/A 323090Sstever@eecs.umich.edu#include "base/chunk_generator.hh" 332657Ssaidi@eecs.umich.edu#include "base/trace.hh" 348232Snate@binkert.org#include "debug/BusAddrRanges.hh" 358232Snate@binkert.org#include "debug/DMA.hh" 36545SN/A#include "dev/io_device.hh" 372901Ssaidi@eecs.umich.edu#include "sim/system.hh" 38545SN/A 392901Ssaidi@eecs.umich.eduPioPort::PioPort(PioDevice *dev, System *s, std::string pname) 403401Sktlim@umich.edu : SimpleTimingPort(dev->name() + pname, dev), device(dev) 412489SN/A{ } 422489SN/A 432489SN/A 442489SN/ATick 453349Sbinkertn@umich.eduPioPort::recvAtomic(PacketPtr pkt) 462489SN/A{ 473091Sstever@eecs.umich.edu return pkt->isRead() ? device->read(pkt) : device->write(pkt); 482489SN/A} 492489SN/A 508711Sandreas.hansson@arm.comAddrRangeList 518711Sandreas.hansson@arm.comPioPort::getAddrRanges() 522489SN/A{ 538711Sandreas.hansson@arm.com return device->getAddrRanges(); 542489SN/A} 552489SN/A 562489SN/A 574762Snate@binkert.orgPioDevice::PioDevice(const Params *p) 588851Sandreas.hansson@arm.com : MemObject(p), sys(p->system), pioPort(this, sys) 594762Snate@binkert.org{} 604762Snate@binkert.org 61545SN/APioDevice::~PioDevice() 62545SN/A{ 63545SN/A} 64545SN/A 652542SN/Avoid 662541SN/APioDevice::init() 672541SN/A{ 688851Sandreas.hansson@arm.com if (!pioPort.isConnected()) 698674Snilay@cs.wisc.edu panic("Pio port of %s not connected to anything!", name()); 708851Sandreas.hansson@arm.com pioPort.sendRangeChange(); 712541SN/A} 722541SN/A 738598Ssteve.reinhardt@amd.comPort * 748598Ssteve.reinhardt@amd.comPioDevice::getPort(const std::string &if_name, int idx) 758598Ssteve.reinhardt@amd.com{ 768598Ssteve.reinhardt@amd.com if (if_name == "pio") { 778851Sandreas.hansson@arm.com return &pioPort; 788598Ssteve.reinhardt@amd.com } 798851Sandreas.hansson@arm.com panic("PioDevice %s has no port named %s\n", name(), if_name); 808598Ssteve.reinhardt@amd.com return NULL; 818598Ssteve.reinhardt@amd.com} 822901Ssaidi@eecs.umich.edu 832901Ssaidi@eecs.umich.eduunsigned int 842901Ssaidi@eecs.umich.eduPioDevice::drain(Event *de) 852901Ssaidi@eecs.umich.edu{ 862901Ssaidi@eecs.umich.edu unsigned int count; 878851Sandreas.hansson@arm.com count = pioPort.drain(de); 882901Ssaidi@eecs.umich.edu if (count) 892901Ssaidi@eecs.umich.edu changeState(Draining); 902901Ssaidi@eecs.umich.edu else 912901Ssaidi@eecs.umich.edu changeState(Drained); 922901Ssaidi@eecs.umich.edu return count; 932901Ssaidi@eecs.umich.edu} 942901Ssaidi@eecs.umich.edu 954762Snate@binkert.orgBasicPioDevice::BasicPioDevice(const Params *p) 964762Snate@binkert.org : PioDevice(p), pioAddr(p->pio_addr), pioSize(0), 974762Snate@binkert.org pioDelay(p->pio_latency) 984762Snate@binkert.org{} 994762Snate@binkert.org 1008711Sandreas.hansson@arm.comAddrRangeList 1018711Sandreas.hansson@arm.comBasicPioDevice::getAddrRanges() 1022539SN/A{ 1032539SN/A assert(pioSize != 0); 1048711Sandreas.hansson@arm.com AddrRangeList ranges; 1057729SAli.Saidi@ARM.com DPRINTF(BusAddrRanges, "registering range: %#x-%#x\n", pioAddr, pioSize); 1068711Sandreas.hansson@arm.com ranges.push_back(RangeSize(pioAddr, pioSize)); 1078711Sandreas.hansson@arm.com return ranges; 1082539SN/A} 1092539SN/A 1102489SN/A 1118630SMitchell.Hayenga@ARM.comDmaPort::DmaPort(MemObject *dev, System *s, Tick min_backoff, Tick max_backoff, 1128630SMitchell.Hayenga@ARM.com bool recv_snoops) 1133401Sktlim@umich.edu : Port(dev->name() + "-dmaport", dev), device(dev), sys(s), 1148832SAli.Saidi@ARM.com masterId(s->getMasterId(dev->name())), 1154435Ssaidi@eecs.umich.edu pendingCount(0), actionInProgress(0), drainEvent(NULL), 1167403SAli.Saidi@ARM.com backoffTime(0), minBackoffDelay(min_backoff), 1178630SMitchell.Hayenga@ARM.com maxBackoffDelay(max_backoff), inRetry(false), recvSnoops(recv_snoops), 1188711Sandreas.hansson@arm.com backoffEvent(this) 1192489SN/A{ } 1202489SN/A 1212489SN/Abool 1223349Sbinkertn@umich.eduDmaPort::recvTiming(PacketPtr pkt) 1232384SN/A{ 1244870Sstever@eecs.umich.edu if (pkt->wasNacked()) { 1254739Sstever@eecs.umich.edu DPRINTF(DMA, "Received nacked %s addr %#x\n", 1264739Sstever@eecs.umich.edu pkt->cmdString(), pkt->getAddr()); 1274435Ssaidi@eecs.umich.edu 1287403SAli.Saidi@ARM.com if (backoffTime < minBackoffDelay) 1297403SAli.Saidi@ARM.com backoffTime = minBackoffDelay; 1307403SAli.Saidi@ARM.com else if (backoffTime < maxBackoffDelay) 1314435Ssaidi@eecs.umich.edu backoffTime <<= 1; 1324435Ssaidi@eecs.umich.edu 1338708Sandreas.hansson@arm.com device->reschedule(backoffEvent, curTick() + backoffTime, true); 1344435Ssaidi@eecs.umich.edu 1354435Ssaidi@eecs.umich.edu DPRINTF(DMA, "Backoff time set to %d ticks\n", backoffTime); 1364435Ssaidi@eecs.umich.edu 1372685Ssaidi@eecs.umich.edu pkt->reinitNacked(); 1384435Ssaidi@eecs.umich.edu queueDma(pkt, true); 1398642Ssaidi@eecs.umich.edu } else if (pkt->isRequest() && recvSnoops) { 1408642Ssaidi@eecs.umich.edu return true; 1412685Ssaidi@eecs.umich.edu } else if (pkt->senderState) { 1422565SN/A DmaReqState *state; 1434435Ssaidi@eecs.umich.edu backoffTime >>= 2; 1444435Ssaidi@eecs.umich.edu 1454739Sstever@eecs.umich.edu DPRINTF(DMA, "Received response %s addr %#x size %#x\n", 1464739Sstever@eecs.umich.edu pkt->cmdString(), pkt->getAddr(), pkt->req->getSize()); 1472641Sstever@eecs.umich.edu state = dynamic_cast<DmaReqState*>(pkt->senderState); 1482685Ssaidi@eecs.umich.edu pendingCount--; 1492685Ssaidi@eecs.umich.edu 1502685Ssaidi@eecs.umich.edu assert(pendingCount >= 0); 1512657Ssaidi@eecs.umich.edu assert(state); 1522685Ssaidi@eecs.umich.edu 1538134SAli.Saidi@ARM.com // We shouldn't ever get a block in ownership state 1548134SAli.Saidi@ARM.com assert(!(pkt->memInhibitAsserted() && !pkt->sharedAsserted())); 1558134SAli.Saidi@ARM.com 1562685Ssaidi@eecs.umich.edu state->numBytes += pkt->req->getSize(); 1574435Ssaidi@eecs.umich.edu assert(state->totBytes >= state->numBytes); 1582685Ssaidi@eecs.umich.edu if (state->totBytes == state->numBytes) { 1597403SAli.Saidi@ARM.com if (state->completionEvent) { 1607403SAli.Saidi@ARM.com if (state->delay) 1618708Sandreas.hansson@arm.com device->schedule(state->completionEvent, 1628708Sandreas.hansson@arm.com curTick() + state->delay); 1637403SAli.Saidi@ARM.com else 1647403SAli.Saidi@ARM.com state->completionEvent->process(); 1657403SAli.Saidi@ARM.com } 1662685Ssaidi@eecs.umich.edu delete state; 1672685Ssaidi@eecs.umich.edu } 1682630SN/A delete pkt->req; 1692630SN/A delete pkt; 1702901Ssaidi@eecs.umich.edu 1712901Ssaidi@eecs.umich.edu if (pendingCount == 0 && drainEvent) { 1722901Ssaidi@eecs.umich.edu drainEvent->process(); 1732901Ssaidi@eecs.umich.edu drainEvent = NULL; 1742901Ssaidi@eecs.umich.edu } 1752569SN/A } else { 1762685Ssaidi@eecs.umich.edu panic("Got packet without sender state... huh?\n"); 1772565SN/A } 1782569SN/A 1792657Ssaidi@eecs.umich.edu return true; 1802384SN/A} 181679SN/A 1824762Snate@binkert.orgDmaDevice::DmaDevice(const Params *p) 1838851Sandreas.hansson@arm.com : PioDevice(p), dmaPort(this, sys, params()->min_backoff_delay, 1848851Sandreas.hansson@arm.com params()->max_backoff_delay) 1852565SN/A{ } 1862384SN/A 1878851Sandreas.hansson@arm.comvoid 1888851Sandreas.hansson@arm.comDmaDevice::init() 1898851Sandreas.hansson@arm.com{ 1908851Sandreas.hansson@arm.com if (!dmaPort.isConnected()) 1918851Sandreas.hansson@arm.com panic("DMA port of %s not connected to anything!", name()); 1928851Sandreas.hansson@arm.com PioDevice::init(); 1938851Sandreas.hansson@arm.com} 1948851Sandreas.hansson@arm.com 1952901Ssaidi@eecs.umich.eduunsigned int 1962901Ssaidi@eecs.umich.eduDmaDevice::drain(Event *de) 1972901Ssaidi@eecs.umich.edu{ 1982901Ssaidi@eecs.umich.edu unsigned int count; 1998851Sandreas.hansson@arm.com count = pioPort.drain(de) + dmaPort.drain(de); 2002901Ssaidi@eecs.umich.edu if (count) 2012901Ssaidi@eecs.umich.edu changeState(Draining); 2022901Ssaidi@eecs.umich.edu else 2032901Ssaidi@eecs.umich.edu changeState(Drained); 2042901Ssaidi@eecs.umich.edu return count; 2052901Ssaidi@eecs.umich.edu} 2062901Ssaidi@eecs.umich.edu 2072901Ssaidi@eecs.umich.eduunsigned int 2082901Ssaidi@eecs.umich.eduDmaPort::drain(Event *de) 2092901Ssaidi@eecs.umich.edu{ 2102901Ssaidi@eecs.umich.edu if (pendingCount == 0) 2112901Ssaidi@eecs.umich.edu return 0; 2122901Ssaidi@eecs.umich.edu drainEvent = de; 2132901Ssaidi@eecs.umich.edu return 1; 2142901Ssaidi@eecs.umich.edu} 2152901Ssaidi@eecs.umich.edu 2162901Ssaidi@eecs.umich.edu 2172384SN/Avoid 2182489SN/ADmaPort::recvRetry() 2192489SN/A{ 2204435Ssaidi@eecs.umich.edu assert(transmitList.size()); 2212659Ssaidi@eecs.umich.edu bool result = true; 2224435Ssaidi@eecs.umich.edu do { 2235539Scws3k@cs.virginia.edu PacketPtr pkt = transmitList.front(); 2244739Sstever@eecs.umich.edu DPRINTF(DMA, "Retry on %s addr %#x\n", 2254739Sstever@eecs.umich.edu pkt->cmdString(), pkt->getAddr()); 2262659Ssaidi@eecs.umich.edu result = sendTiming(pkt); 2272659Ssaidi@eecs.umich.edu if (result) { 2282659Ssaidi@eecs.umich.edu DPRINTF(DMA, "-- Done\n"); 2292659Ssaidi@eecs.umich.edu transmitList.pop_front(); 2304435Ssaidi@eecs.umich.edu inRetry = false; 2312659Ssaidi@eecs.umich.edu } else { 2324435Ssaidi@eecs.umich.edu inRetry = true; 2332659Ssaidi@eecs.umich.edu DPRINTF(DMA, "-- Failed, queued\n"); 2342659Ssaidi@eecs.umich.edu } 2354435Ssaidi@eecs.umich.edu } while (!backoffTime && result && transmitList.size()); 2364435Ssaidi@eecs.umich.edu 2374435Ssaidi@eecs.umich.edu if (transmitList.size() && backoffTime && !inRetry) { 2387823Ssteve.reinhardt@amd.com DPRINTF(DMA, "Scheduling backoff for %d\n", curTick()+backoffTime); 2394435Ssaidi@eecs.umich.edu if (!backoffEvent.scheduled()) 2408708Sandreas.hansson@arm.com device->schedule(backoffEvent, backoffTime + curTick()); 2412657Ssaidi@eecs.umich.edu } 2424435Ssaidi@eecs.umich.edu DPRINTF(DMA, "TransmitList: %d, backoffTime: %d inRetry: %d es: %d\n", 2434435Ssaidi@eecs.umich.edu transmitList.size(), backoffTime, inRetry, 2444435Ssaidi@eecs.umich.edu backoffEvent.scheduled()); 2452489SN/A} 2462641Sstever@eecs.umich.edu 2472641Sstever@eecs.umich.edu 2482489SN/Avoid 2492641Sstever@eecs.umich.eduDmaPort::dmaAction(Packet::Command cmd, Addr addr, int size, Event *event, 2507607SGene.Wu@arm.com uint8_t *data, Tick delay, Request::Flags flag) 2512384SN/A{ 2522901Ssaidi@eecs.umich.edu assert(device->getState() == SimObject::Running); 2532901Ssaidi@eecs.umich.edu 2545534Ssaidi@eecs.umich.edu DmaReqState *reqState = new DmaReqState(event, this, size, delay); 2552384SN/A 2564451Ssaidi@eecs.umich.edu 2574451Ssaidi@eecs.umich.edu DPRINTF(DMA, "Starting DMA for addr: %#x size: %d sched: %d\n", addr, size, 2587607SGene.Wu@arm.com event ? event->scheduled() : -1 ); 2592406SN/A for (ChunkGenerator gen(addr, size, peerBlockSize()); 2602406SN/A !gen.done(); gen.next()) { 2618832SAli.Saidi@ARM.com Request *req = new Request(gen.addr(), gen.size(), flag, masterId); 2623349Sbinkertn@umich.edu PacketPtr pkt = new Packet(req, cmd, Packet::Broadcast); 2632641Sstever@eecs.umich.edu 2642384SN/A // Increment the data pointer on a write 2652566SN/A if (data) 2662685Ssaidi@eecs.umich.edu pkt->dataStatic(data + gen.complete()); 2672641Sstever@eecs.umich.edu 2682685Ssaidi@eecs.umich.edu pkt->senderState = reqState; 2692641Sstever@eecs.umich.edu 2702565SN/A assert(pendingCount >= 0); 2712565SN/A pendingCount++; 2724451Ssaidi@eecs.umich.edu DPRINTF(DMA, "--Queuing DMA for addr: %#x size: %d\n", gen.addr(), 2734451Ssaidi@eecs.umich.edu gen.size()); 2744435Ssaidi@eecs.umich.edu queueDma(pkt); 2752384SN/A } 2762901Ssaidi@eecs.umich.edu 2772384SN/A} 2782384SN/A 2794435Ssaidi@eecs.umich.eduvoid 2804435Ssaidi@eecs.umich.eduDmaPort::queueDma(PacketPtr pkt, bool front) 2814435Ssaidi@eecs.umich.edu{ 2824435Ssaidi@eecs.umich.edu 2834435Ssaidi@eecs.umich.edu if (front) 2844435Ssaidi@eecs.umich.edu transmitList.push_front(pkt); 2854435Ssaidi@eecs.umich.edu else 2864435Ssaidi@eecs.umich.edu transmitList.push_back(pkt); 2874435Ssaidi@eecs.umich.edu sendDma(); 2884435Ssaidi@eecs.umich.edu} 2894435Ssaidi@eecs.umich.edu 2902384SN/A 2912384SN/Avoid 2924435Ssaidi@eecs.umich.eduDmaPort::sendDma() 2932384SN/A{ 2942901Ssaidi@eecs.umich.edu // some kind of selction between access methods 2952901Ssaidi@eecs.umich.edu // more work is going to have to be done to make 2962901Ssaidi@eecs.umich.edu // switching actually work 2974435Ssaidi@eecs.umich.edu assert(transmitList.size()); 2984435Ssaidi@eecs.umich.edu PacketPtr pkt = transmitList.front(); 2992902Ssaidi@eecs.umich.edu 3004762Snate@binkert.org Enums::MemoryMode state = sys->getMemoryMode(); 3014762Snate@binkert.org if (state == Enums::timing) { 3024435Ssaidi@eecs.umich.edu if (backoffEvent.scheduled() || inRetry) { 3034435Ssaidi@eecs.umich.edu DPRINTF(DMA, "Can't send immediately, waiting for retry or backoff timer\n"); 3044435Ssaidi@eecs.umich.edu return; 3054435Ssaidi@eecs.umich.edu } 3064435Ssaidi@eecs.umich.edu 3074739Sstever@eecs.umich.edu DPRINTF(DMA, "Attempting to send %s addr %#x\n", 3084739Sstever@eecs.umich.edu pkt->cmdString(), pkt->getAddr()); 3094435Ssaidi@eecs.umich.edu 3104435Ssaidi@eecs.umich.edu bool result; 3114435Ssaidi@eecs.umich.edu do { 3124435Ssaidi@eecs.umich.edu result = sendTiming(pkt); 3134435Ssaidi@eecs.umich.edu if (result) { 3144435Ssaidi@eecs.umich.edu transmitList.pop_front(); 3154435Ssaidi@eecs.umich.edu DPRINTF(DMA, "-- Done\n"); 3164435Ssaidi@eecs.umich.edu } else { 3174435Ssaidi@eecs.umich.edu inRetry = true; 3184435Ssaidi@eecs.umich.edu DPRINTF(DMA, "-- Failed: queued\n"); 3194435Ssaidi@eecs.umich.edu } 3204435Ssaidi@eecs.umich.edu } while (result && !backoffTime && transmitList.size()); 3214435Ssaidi@eecs.umich.edu 3224435Ssaidi@eecs.umich.edu if (transmitList.size() && backoffTime && !inRetry && 3234435Ssaidi@eecs.umich.edu !backoffEvent.scheduled()) { 3244451Ssaidi@eecs.umich.edu DPRINTF(DMA, "-- Scheduling backoff timer for %d\n", 3257823Ssteve.reinhardt@amd.com backoffTime+curTick()); 3268708Sandreas.hansson@arm.com device->schedule(backoffEvent, backoffTime + curTick()); 3272901Ssaidi@eecs.umich.edu } 3284762Snate@binkert.org } else if (state == Enums::atomic) { 3294435Ssaidi@eecs.umich.edu transmitList.pop_front(); 3304435Ssaidi@eecs.umich.edu 3312902Ssaidi@eecs.umich.edu Tick lat; 3324451Ssaidi@eecs.umich.edu DPRINTF(DMA, "--Sending DMA for addr: %#x size: %d\n", 3334451Ssaidi@eecs.umich.edu pkt->req->getPaddr(), pkt->req->getSize()); 3342902Ssaidi@eecs.umich.edu lat = sendAtomic(pkt); 3352901Ssaidi@eecs.umich.edu assert(pkt->senderState); 3362901Ssaidi@eecs.umich.edu DmaReqState *state = dynamic_cast<DmaReqState*>(pkt->senderState); 3372901Ssaidi@eecs.umich.edu assert(state); 3384451Ssaidi@eecs.umich.edu state->numBytes += pkt->req->getSize(); 3392384SN/A 3404451Ssaidi@eecs.umich.edu DPRINTF(DMA, "--Received response for DMA for addr: %#x size: %d nb: %d, tot: %d sched %d\n", 3414451Ssaidi@eecs.umich.edu pkt->req->getPaddr(), pkt->req->getSize(), state->numBytes, 3427403SAli.Saidi@ARM.com state->totBytes, 3437403SAli.Saidi@ARM.com state->completionEvent ? state->completionEvent->scheduled() : 0 ); 3444451Ssaidi@eecs.umich.edu 3452901Ssaidi@eecs.umich.edu if (state->totBytes == state->numBytes) { 3467403SAli.Saidi@ARM.com if (state->completionEvent) { 3477403SAli.Saidi@ARM.com assert(!state->completionEvent->scheduled()); 3488708Sandreas.hansson@arm.com device->schedule(state->completionEvent, 3498708Sandreas.hansson@arm.com curTick() + lat + state->delay); 3507403SAli.Saidi@ARM.com } 3512901Ssaidi@eecs.umich.edu delete state; 3522901Ssaidi@eecs.umich.edu delete pkt->req; 3532901Ssaidi@eecs.umich.edu } 3542901Ssaidi@eecs.umich.edu pendingCount--; 3552901Ssaidi@eecs.umich.edu assert(pendingCount >= 0); 3562901Ssaidi@eecs.umich.edu delete pkt; 3572566SN/A 3582901Ssaidi@eecs.umich.edu if (pendingCount == 0 && drainEvent) { 3592901Ssaidi@eecs.umich.edu drainEvent->process(); 3602901Ssaidi@eecs.umich.edu drainEvent = NULL; 3612901Ssaidi@eecs.umich.edu } 3622901Ssaidi@eecs.umich.edu 3632384SN/A } else 3642384SN/A panic("Unknown memory command state."); 3652384SN/A} 366545SN/A 367545SN/ADmaDevice::~DmaDevice() 368545SN/A{ 369545SN/A} 3708598Ssteve.reinhardt@amd.com 3718598Ssteve.reinhardt@amd.com 3728598Ssteve.reinhardt@amd.comPort * 3738598Ssteve.reinhardt@amd.comDmaDevice::getPort(const std::string &if_name, int idx) 3748598Ssteve.reinhardt@amd.com{ 3758598Ssteve.reinhardt@amd.com if (if_name == "dma") { 3768851Sandreas.hansson@arm.com return &dmaPort; 3778598Ssteve.reinhardt@amd.com } 3788598Ssteve.reinhardt@amd.com return PioDevice::getPort(if_name, idx); 3798598Ssteve.reinhardt@amd.com} 3808598Ssteve.reinhardt@amd.com 381