io_device.cc revision 8914
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 398914Sandreas.hansson@arm.comPioPort::PioPort(PioDevice *dev) 408914Sandreas.hansson@arm.com : SimpleTimingPort(dev->name() + "-pioport", dev), device(dev) 418914Sandreas.hansson@arm.com{ 428914Sandreas.hansson@arm.com} 432489SN/A 442489SN/A 452489SN/ATick 463349Sbinkertn@umich.eduPioPort::recvAtomic(PacketPtr pkt) 472489SN/A{ 483091Sstever@eecs.umich.edu return pkt->isRead() ? device->read(pkt) : device->write(pkt); 492489SN/A} 502489SN/A 518711Sandreas.hansson@arm.comAddrRangeList 528711Sandreas.hansson@arm.comPioPort::getAddrRanges() 532489SN/A{ 548711Sandreas.hansson@arm.com return device->getAddrRanges(); 552489SN/A} 562489SN/A 572489SN/A 584762Snate@binkert.orgPioDevice::PioDevice(const Params *p) 598914Sandreas.hansson@arm.com : MemObject(p), sys(p->system), pioPort(this) 604762Snate@binkert.org{} 614762Snate@binkert.org 62545SN/APioDevice::~PioDevice() 63545SN/A{ 64545SN/A} 65545SN/A 662542SN/Avoid 672541SN/APioDevice::init() 682541SN/A{ 698851Sandreas.hansson@arm.com if (!pioPort.isConnected()) 708674Snilay@cs.wisc.edu panic("Pio port of %s not connected to anything!", name()); 718851Sandreas.hansson@arm.com pioPort.sendRangeChange(); 722541SN/A} 732541SN/A 748598Ssteve.reinhardt@amd.comPort * 758598Ssteve.reinhardt@amd.comPioDevice::getPort(const std::string &if_name, int idx) 768598Ssteve.reinhardt@amd.com{ 778598Ssteve.reinhardt@amd.com if (if_name == "pio") { 788851Sandreas.hansson@arm.com return &pioPort; 798598Ssteve.reinhardt@amd.com } 808851Sandreas.hansson@arm.com panic("PioDevice %s has no port named %s\n", name(), if_name); 818598Ssteve.reinhardt@amd.com return NULL; 828598Ssteve.reinhardt@amd.com} 832901Ssaidi@eecs.umich.edu 842901Ssaidi@eecs.umich.eduunsigned int 852901Ssaidi@eecs.umich.eduPioDevice::drain(Event *de) 862901Ssaidi@eecs.umich.edu{ 872901Ssaidi@eecs.umich.edu unsigned int count; 888851Sandreas.hansson@arm.com count = pioPort.drain(de); 892901Ssaidi@eecs.umich.edu if (count) 902901Ssaidi@eecs.umich.edu changeState(Draining); 912901Ssaidi@eecs.umich.edu else 922901Ssaidi@eecs.umich.edu changeState(Drained); 932901Ssaidi@eecs.umich.edu return count; 942901Ssaidi@eecs.umich.edu} 952901Ssaidi@eecs.umich.edu 964762Snate@binkert.orgBasicPioDevice::BasicPioDevice(const Params *p) 974762Snate@binkert.org : PioDevice(p), pioAddr(p->pio_addr), pioSize(0), 984762Snate@binkert.org pioDelay(p->pio_latency) 994762Snate@binkert.org{} 1004762Snate@binkert.org 1018711Sandreas.hansson@arm.comAddrRangeList 1028711Sandreas.hansson@arm.comBasicPioDevice::getAddrRanges() 1032539SN/A{ 1042539SN/A assert(pioSize != 0); 1058711Sandreas.hansson@arm.com AddrRangeList ranges; 1067729SAli.Saidi@ARM.com DPRINTF(BusAddrRanges, "registering range: %#x-%#x\n", pioAddr, pioSize); 1078711Sandreas.hansson@arm.com ranges.push_back(RangeSize(pioAddr, pioSize)); 1088711Sandreas.hansson@arm.com return ranges; 1092539SN/A} 1102539SN/A 1112489SN/A 1128630SMitchell.Hayenga@ARM.comDmaPort::DmaPort(MemObject *dev, System *s, Tick min_backoff, Tick max_backoff, 1138630SMitchell.Hayenga@ARM.com bool recv_snoops) 1143401Sktlim@umich.edu : Port(dev->name() + "-dmaport", dev), device(dev), sys(s), 1158832SAli.Saidi@ARM.com masterId(s->getMasterId(dev->name())), 1164435Ssaidi@eecs.umich.edu pendingCount(0), actionInProgress(0), drainEvent(NULL), 1177403SAli.Saidi@ARM.com backoffTime(0), minBackoffDelay(min_backoff), 1188630SMitchell.Hayenga@ARM.com maxBackoffDelay(max_backoff), inRetry(false), recvSnoops(recv_snoops), 1198711Sandreas.hansson@arm.com backoffEvent(this) 1202489SN/A{ } 1212489SN/A 1222489SN/Abool 1233349Sbinkertn@umich.eduDmaPort::recvTiming(PacketPtr pkt) 1242384SN/A{ 1254870Sstever@eecs.umich.edu if (pkt->wasNacked()) { 1264739Sstever@eecs.umich.edu DPRINTF(DMA, "Received nacked %s addr %#x\n", 1274739Sstever@eecs.umich.edu pkt->cmdString(), pkt->getAddr()); 1284435Ssaidi@eecs.umich.edu 1297403SAli.Saidi@ARM.com if (backoffTime < minBackoffDelay) 1307403SAli.Saidi@ARM.com backoffTime = minBackoffDelay; 1317403SAli.Saidi@ARM.com else if (backoffTime < maxBackoffDelay) 1324435Ssaidi@eecs.umich.edu backoffTime <<= 1; 1334435Ssaidi@eecs.umich.edu 1348708Sandreas.hansson@arm.com device->reschedule(backoffEvent, curTick() + backoffTime, true); 1354435Ssaidi@eecs.umich.edu 1364435Ssaidi@eecs.umich.edu DPRINTF(DMA, "Backoff time set to %d ticks\n", backoffTime); 1374435Ssaidi@eecs.umich.edu 1382685Ssaidi@eecs.umich.edu pkt->reinitNacked(); 1394435Ssaidi@eecs.umich.edu queueDma(pkt, true); 1408642Ssaidi@eecs.umich.edu } else if (pkt->isRequest() && recvSnoops) { 1418642Ssaidi@eecs.umich.edu return true; 1422685Ssaidi@eecs.umich.edu } else if (pkt->senderState) { 1432565SN/A DmaReqState *state; 1444435Ssaidi@eecs.umich.edu backoffTime >>= 2; 1454435Ssaidi@eecs.umich.edu 1464739Sstever@eecs.umich.edu DPRINTF(DMA, "Received response %s addr %#x size %#x\n", 1474739Sstever@eecs.umich.edu pkt->cmdString(), pkt->getAddr(), pkt->req->getSize()); 1482641Sstever@eecs.umich.edu state = dynamic_cast<DmaReqState*>(pkt->senderState); 1492685Ssaidi@eecs.umich.edu pendingCount--; 1502685Ssaidi@eecs.umich.edu 1512685Ssaidi@eecs.umich.edu assert(pendingCount >= 0); 1522657Ssaidi@eecs.umich.edu assert(state); 1532685Ssaidi@eecs.umich.edu 1548134SAli.Saidi@ARM.com // We shouldn't ever get a block in ownership state 1558134SAli.Saidi@ARM.com assert(!(pkt->memInhibitAsserted() && !pkt->sharedAsserted())); 1568134SAli.Saidi@ARM.com 1572685Ssaidi@eecs.umich.edu state->numBytes += pkt->req->getSize(); 1584435Ssaidi@eecs.umich.edu assert(state->totBytes >= state->numBytes); 1592685Ssaidi@eecs.umich.edu if (state->totBytes == state->numBytes) { 1607403SAli.Saidi@ARM.com if (state->completionEvent) { 1617403SAli.Saidi@ARM.com if (state->delay) 1628708Sandreas.hansson@arm.com device->schedule(state->completionEvent, 1638708Sandreas.hansson@arm.com curTick() + state->delay); 1647403SAli.Saidi@ARM.com else 1657403SAli.Saidi@ARM.com state->completionEvent->process(); 1667403SAli.Saidi@ARM.com } 1672685Ssaidi@eecs.umich.edu delete state; 1682685Ssaidi@eecs.umich.edu } 1692630SN/A delete pkt->req; 1702630SN/A delete pkt; 1712901Ssaidi@eecs.umich.edu 1722901Ssaidi@eecs.umich.edu if (pendingCount == 0 && drainEvent) { 1732901Ssaidi@eecs.umich.edu drainEvent->process(); 1742901Ssaidi@eecs.umich.edu drainEvent = NULL; 1752901Ssaidi@eecs.umich.edu } 1762569SN/A } else { 1772685Ssaidi@eecs.umich.edu panic("Got packet without sender state... huh?\n"); 1782565SN/A } 1792569SN/A 1802657Ssaidi@eecs.umich.edu return true; 1812384SN/A} 182679SN/A 1834762Snate@binkert.orgDmaDevice::DmaDevice(const Params *p) 1848851Sandreas.hansson@arm.com : PioDevice(p), dmaPort(this, sys, params()->min_backoff_delay, 1858851Sandreas.hansson@arm.com params()->max_backoff_delay) 1862565SN/A{ } 1872384SN/A 1888851Sandreas.hansson@arm.comvoid 1898851Sandreas.hansson@arm.comDmaDevice::init() 1908851Sandreas.hansson@arm.com{ 1918851Sandreas.hansson@arm.com if (!dmaPort.isConnected()) 1928851Sandreas.hansson@arm.com panic("DMA port of %s not connected to anything!", name()); 1938851Sandreas.hansson@arm.com PioDevice::init(); 1948851Sandreas.hansson@arm.com} 1958851Sandreas.hansson@arm.com 1962901Ssaidi@eecs.umich.eduunsigned int 1972901Ssaidi@eecs.umich.eduDmaDevice::drain(Event *de) 1982901Ssaidi@eecs.umich.edu{ 1992901Ssaidi@eecs.umich.edu unsigned int count; 2008851Sandreas.hansson@arm.com count = pioPort.drain(de) + dmaPort.drain(de); 2012901Ssaidi@eecs.umich.edu if (count) 2022901Ssaidi@eecs.umich.edu changeState(Draining); 2032901Ssaidi@eecs.umich.edu else 2042901Ssaidi@eecs.umich.edu changeState(Drained); 2052901Ssaidi@eecs.umich.edu return count; 2062901Ssaidi@eecs.umich.edu} 2072901Ssaidi@eecs.umich.edu 2082901Ssaidi@eecs.umich.eduunsigned int 2092901Ssaidi@eecs.umich.eduDmaPort::drain(Event *de) 2102901Ssaidi@eecs.umich.edu{ 2112901Ssaidi@eecs.umich.edu if (pendingCount == 0) 2122901Ssaidi@eecs.umich.edu return 0; 2132901Ssaidi@eecs.umich.edu drainEvent = de; 2142901Ssaidi@eecs.umich.edu return 1; 2152901Ssaidi@eecs.umich.edu} 2162901Ssaidi@eecs.umich.edu 2172901Ssaidi@eecs.umich.edu 2182384SN/Avoid 2192489SN/ADmaPort::recvRetry() 2202489SN/A{ 2214435Ssaidi@eecs.umich.edu assert(transmitList.size()); 2222659Ssaidi@eecs.umich.edu bool result = true; 2234435Ssaidi@eecs.umich.edu do { 2245539Scws3k@cs.virginia.edu PacketPtr pkt = transmitList.front(); 2254739Sstever@eecs.umich.edu DPRINTF(DMA, "Retry on %s addr %#x\n", 2264739Sstever@eecs.umich.edu pkt->cmdString(), pkt->getAddr()); 2272659Ssaidi@eecs.umich.edu result = sendTiming(pkt); 2282659Ssaidi@eecs.umich.edu if (result) { 2292659Ssaidi@eecs.umich.edu DPRINTF(DMA, "-- Done\n"); 2302659Ssaidi@eecs.umich.edu transmitList.pop_front(); 2314435Ssaidi@eecs.umich.edu inRetry = false; 2322659Ssaidi@eecs.umich.edu } else { 2334435Ssaidi@eecs.umich.edu inRetry = true; 2342659Ssaidi@eecs.umich.edu DPRINTF(DMA, "-- Failed, queued\n"); 2352659Ssaidi@eecs.umich.edu } 2364435Ssaidi@eecs.umich.edu } while (!backoffTime && result && transmitList.size()); 2374435Ssaidi@eecs.umich.edu 2384435Ssaidi@eecs.umich.edu if (transmitList.size() && backoffTime && !inRetry) { 2397823Ssteve.reinhardt@amd.com DPRINTF(DMA, "Scheduling backoff for %d\n", curTick()+backoffTime); 2404435Ssaidi@eecs.umich.edu if (!backoffEvent.scheduled()) 2418708Sandreas.hansson@arm.com device->schedule(backoffEvent, backoffTime + curTick()); 2422657Ssaidi@eecs.umich.edu } 2434435Ssaidi@eecs.umich.edu DPRINTF(DMA, "TransmitList: %d, backoffTime: %d inRetry: %d es: %d\n", 2444435Ssaidi@eecs.umich.edu transmitList.size(), backoffTime, inRetry, 2454435Ssaidi@eecs.umich.edu backoffEvent.scheduled()); 2462489SN/A} 2472641Sstever@eecs.umich.edu 2482641Sstever@eecs.umich.edu 2492489SN/Avoid 2502641Sstever@eecs.umich.eduDmaPort::dmaAction(Packet::Command cmd, Addr addr, int size, Event *event, 2517607SGene.Wu@arm.com uint8_t *data, Tick delay, Request::Flags flag) 2522384SN/A{ 2532901Ssaidi@eecs.umich.edu assert(device->getState() == SimObject::Running); 2542901Ssaidi@eecs.umich.edu 2555534Ssaidi@eecs.umich.edu DmaReqState *reqState = new DmaReqState(event, this, size, delay); 2562384SN/A 2574451Ssaidi@eecs.umich.edu 2584451Ssaidi@eecs.umich.edu DPRINTF(DMA, "Starting DMA for addr: %#x size: %d sched: %d\n", addr, size, 2597607SGene.Wu@arm.com event ? event->scheduled() : -1 ); 2602406SN/A for (ChunkGenerator gen(addr, size, peerBlockSize()); 2612406SN/A !gen.done(); gen.next()) { 2628832SAli.Saidi@ARM.com Request *req = new Request(gen.addr(), gen.size(), flag, masterId); 2633349Sbinkertn@umich.edu PacketPtr pkt = new Packet(req, cmd, Packet::Broadcast); 2642641Sstever@eecs.umich.edu 2652384SN/A // Increment the data pointer on a write 2662566SN/A if (data) 2672685Ssaidi@eecs.umich.edu pkt->dataStatic(data + gen.complete()); 2682641Sstever@eecs.umich.edu 2692685Ssaidi@eecs.umich.edu pkt->senderState = reqState; 2702641Sstever@eecs.umich.edu 2712565SN/A assert(pendingCount >= 0); 2722565SN/A pendingCount++; 2734451Ssaidi@eecs.umich.edu DPRINTF(DMA, "--Queuing DMA for addr: %#x size: %d\n", gen.addr(), 2744451Ssaidi@eecs.umich.edu gen.size()); 2754435Ssaidi@eecs.umich.edu queueDma(pkt); 2762384SN/A } 2772901Ssaidi@eecs.umich.edu 2782384SN/A} 2792384SN/A 2804435Ssaidi@eecs.umich.eduvoid 2814435Ssaidi@eecs.umich.eduDmaPort::queueDma(PacketPtr pkt, bool front) 2824435Ssaidi@eecs.umich.edu{ 2834435Ssaidi@eecs.umich.edu 2844435Ssaidi@eecs.umich.edu if (front) 2854435Ssaidi@eecs.umich.edu transmitList.push_front(pkt); 2864435Ssaidi@eecs.umich.edu else 2874435Ssaidi@eecs.umich.edu transmitList.push_back(pkt); 2884435Ssaidi@eecs.umich.edu sendDma(); 2894435Ssaidi@eecs.umich.edu} 2904435Ssaidi@eecs.umich.edu 2912384SN/A 2922384SN/Avoid 2934435Ssaidi@eecs.umich.eduDmaPort::sendDma() 2942384SN/A{ 2952901Ssaidi@eecs.umich.edu // some kind of selction between access methods 2962901Ssaidi@eecs.umich.edu // more work is going to have to be done to make 2972901Ssaidi@eecs.umich.edu // switching actually work 2984435Ssaidi@eecs.umich.edu assert(transmitList.size()); 2994435Ssaidi@eecs.umich.edu PacketPtr pkt = transmitList.front(); 3002902Ssaidi@eecs.umich.edu 3014762Snate@binkert.org Enums::MemoryMode state = sys->getMemoryMode(); 3024762Snate@binkert.org if (state == Enums::timing) { 3034435Ssaidi@eecs.umich.edu if (backoffEvent.scheduled() || inRetry) { 3044435Ssaidi@eecs.umich.edu DPRINTF(DMA, "Can't send immediately, waiting for retry or backoff timer\n"); 3054435Ssaidi@eecs.umich.edu return; 3064435Ssaidi@eecs.umich.edu } 3074435Ssaidi@eecs.umich.edu 3084739Sstever@eecs.umich.edu DPRINTF(DMA, "Attempting to send %s addr %#x\n", 3094739Sstever@eecs.umich.edu pkt->cmdString(), pkt->getAddr()); 3104435Ssaidi@eecs.umich.edu 3114435Ssaidi@eecs.umich.edu bool result; 3124435Ssaidi@eecs.umich.edu do { 3134435Ssaidi@eecs.umich.edu result = sendTiming(pkt); 3144435Ssaidi@eecs.umich.edu if (result) { 3154435Ssaidi@eecs.umich.edu transmitList.pop_front(); 3164435Ssaidi@eecs.umich.edu DPRINTF(DMA, "-- Done\n"); 3174435Ssaidi@eecs.umich.edu } else { 3184435Ssaidi@eecs.umich.edu inRetry = true; 3194435Ssaidi@eecs.umich.edu DPRINTF(DMA, "-- Failed: queued\n"); 3204435Ssaidi@eecs.umich.edu } 3214435Ssaidi@eecs.umich.edu } while (result && !backoffTime && transmitList.size()); 3224435Ssaidi@eecs.umich.edu 3234435Ssaidi@eecs.umich.edu if (transmitList.size() && backoffTime && !inRetry && 3244435Ssaidi@eecs.umich.edu !backoffEvent.scheduled()) { 3254451Ssaidi@eecs.umich.edu DPRINTF(DMA, "-- Scheduling backoff timer for %d\n", 3267823Ssteve.reinhardt@amd.com backoffTime+curTick()); 3278708Sandreas.hansson@arm.com device->schedule(backoffEvent, backoffTime + curTick()); 3282901Ssaidi@eecs.umich.edu } 3294762Snate@binkert.org } else if (state == Enums::atomic) { 3304435Ssaidi@eecs.umich.edu transmitList.pop_front(); 3314435Ssaidi@eecs.umich.edu 3322902Ssaidi@eecs.umich.edu Tick lat; 3334451Ssaidi@eecs.umich.edu DPRINTF(DMA, "--Sending DMA for addr: %#x size: %d\n", 3344451Ssaidi@eecs.umich.edu pkt->req->getPaddr(), pkt->req->getSize()); 3352902Ssaidi@eecs.umich.edu lat = sendAtomic(pkt); 3362901Ssaidi@eecs.umich.edu assert(pkt->senderState); 3372901Ssaidi@eecs.umich.edu DmaReqState *state = dynamic_cast<DmaReqState*>(pkt->senderState); 3382901Ssaidi@eecs.umich.edu assert(state); 3394451Ssaidi@eecs.umich.edu state->numBytes += pkt->req->getSize(); 3402384SN/A 3414451Ssaidi@eecs.umich.edu DPRINTF(DMA, "--Received response for DMA for addr: %#x size: %d nb: %d, tot: %d sched %d\n", 3424451Ssaidi@eecs.umich.edu pkt->req->getPaddr(), pkt->req->getSize(), state->numBytes, 3437403SAli.Saidi@ARM.com state->totBytes, 3447403SAli.Saidi@ARM.com state->completionEvent ? state->completionEvent->scheduled() : 0 ); 3454451Ssaidi@eecs.umich.edu 3462901Ssaidi@eecs.umich.edu if (state->totBytes == state->numBytes) { 3477403SAli.Saidi@ARM.com if (state->completionEvent) { 3487403SAli.Saidi@ARM.com assert(!state->completionEvent->scheduled()); 3498708Sandreas.hansson@arm.com device->schedule(state->completionEvent, 3508708Sandreas.hansson@arm.com curTick() + lat + state->delay); 3517403SAli.Saidi@ARM.com } 3522901Ssaidi@eecs.umich.edu delete state; 3532901Ssaidi@eecs.umich.edu delete pkt->req; 3542901Ssaidi@eecs.umich.edu } 3552901Ssaidi@eecs.umich.edu pendingCount--; 3562901Ssaidi@eecs.umich.edu assert(pendingCount >= 0); 3572901Ssaidi@eecs.umich.edu delete pkt; 3582566SN/A 3592901Ssaidi@eecs.umich.edu if (pendingCount == 0 && drainEvent) { 3602901Ssaidi@eecs.umich.edu drainEvent->process(); 3612901Ssaidi@eecs.umich.edu drainEvent = NULL; 3622901Ssaidi@eecs.umich.edu } 3632901Ssaidi@eecs.umich.edu 3642384SN/A } else 3652384SN/A panic("Unknown memory command state."); 3662384SN/A} 367545SN/A 368545SN/ADmaDevice::~DmaDevice() 369545SN/A{ 370545SN/A} 3718598Ssteve.reinhardt@amd.com 3728598Ssteve.reinhardt@amd.com 3738598Ssteve.reinhardt@amd.comPort * 3748598Ssteve.reinhardt@amd.comDmaDevice::getPort(const std::string &if_name, int idx) 3758598Ssteve.reinhardt@amd.com{ 3768598Ssteve.reinhardt@amd.com if (if_name == "dma") { 3778851Sandreas.hansson@arm.com return &dmaPort; 3788598Ssteve.reinhardt@amd.com } 3798598Ssteve.reinhardt@amd.com return PioDevice::getPort(if_name, idx); 3808598Ssteve.reinhardt@amd.com} 3818598Ssteve.reinhardt@amd.com 382