io_device.cc revision 2784
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 322657Ssaidi@eecs.umich.edu#include "base/trace.hh" 33545SN/A#include "dev/io_device.hh" 34679SN/A#include "sim/builder.hh" 35545SN/A 362489SN/A 372497SN/APioPort::PioPort(PioDevice *dev, Platform *p) 382640Sstever@eecs.umich.edu : Port(dev->name() + "-pioport"), device(dev), platform(p) 392489SN/A{ } 402489SN/A 412489SN/A 422489SN/ATick 432630SN/APioPort::recvAtomic(Packet *pkt) 442489SN/A{ 452489SN/A return device->recvAtomic(pkt); 462489SN/A} 472489SN/A 482489SN/Avoid 492630SN/APioPort::recvFunctional(Packet *pkt) 502489SN/A{ 512489SN/A device->recvAtomic(pkt); 522489SN/A} 532489SN/A 542489SN/Avoid 552521SN/APioPort::getDeviceAddressRanges(AddrRangeList &resp, AddrRangeList &snoop) 562489SN/A{ 572521SN/A snoop.clear(); 582521SN/A device->addressRanges(resp); 592489SN/A} 602489SN/A 612489SN/A 622657Ssaidi@eecs.umich.eduvoid 632489SN/APioPort::recvRetry() 642489SN/A{ 652784Ssaidi@eecs.umich.edu bool result = true; 662784Ssaidi@eecs.umich.edu while (result && transmitList.size()) { 672784Ssaidi@eecs.umich.edu result = Port::sendTiming(transmitList.front()); 682784Ssaidi@eecs.umich.edu if (result) 692784Ssaidi@eecs.umich.edu transmitList.pop_front(); 702657Ssaidi@eecs.umich.edu } 712489SN/A} 722489SN/A 732384SN/Avoid 742384SN/APioPort::SendEvent::process() 752384SN/A{ 762641Sstever@eecs.umich.edu if (port->Port::sendTiming(packet)) 772384SN/A return; 782384SN/A 792630SN/A port->transmitList.push_back(packet); 802384SN/A} 812384SN/A 822384SN/A 832657Ssaidi@eecs.umich.edu 842384SN/Abool 852630SN/APioPort::recvTiming(Packet *pkt) 862384SN/A{ 872784Ssaidi@eecs.umich.edu if (pkt->result == Packet::Nacked) { 882784Ssaidi@eecs.umich.edu pkt->reinitNacked(); 892784Ssaidi@eecs.umich.edu if (transmitList.size()) { 902784Ssaidi@eecs.umich.edu transmitList.push_front(pkt); 912784Ssaidi@eecs.umich.edu } else { 922784Ssaidi@eecs.umich.edu if (!Port::sendTiming(pkt)) 932784Ssaidi@eecs.umich.edu transmitList.push_front(pkt); 942784Ssaidi@eecs.umich.edu } 952784Ssaidi@eecs.umich.edu } else { 962784Ssaidi@eecs.umich.edu Tick latency = device->recvAtomic(pkt); 972784Ssaidi@eecs.umich.edu // turn packet around to go back to requester 982784Ssaidi@eecs.umich.edu pkt->makeTimingResponse(); 992784Ssaidi@eecs.umich.edu sendTiming(pkt, latency); 1002784Ssaidi@eecs.umich.edu } 1012641Sstever@eecs.umich.edu return true; 1022384SN/A} 103545SN/A 104545SN/APioDevice::~PioDevice() 105545SN/A{ 1062384SN/A if (pioPort) 1072489SN/A delete pioPort; 108545SN/A} 109545SN/A 1102542SN/Avoid 1112541SN/APioDevice::init() 1122541SN/A{ 1132541SN/A if (!pioPort) 1142541SN/A panic("Pio port not connected to anything!"); 1152541SN/A pioPort->sendStatusChange(Port::RangeChange); 1162541SN/A} 1172541SN/A 1182539SN/Avoid 1192539SN/ABasicPioDevice::addressRanges(AddrRangeList &range_list) 1202539SN/A{ 1212539SN/A assert(pioSize != 0); 1222539SN/A range_list.clear(); 1232539SN/A range_list.push_back(RangeSize(pioAddr, pioSize)); 1242539SN/A} 1252539SN/A 1262489SN/A 1272565SN/ADmaPort::DmaPort(DmaDevice *dev, Platform *p) 1282640Sstever@eecs.umich.edu : Port(dev->name() + "-dmaport"), device(dev), platform(p), pendingCount(0) 1292489SN/A{ } 1302489SN/A 1312489SN/Abool 1322630SN/ADmaPort::recvTiming(Packet *pkt) 1332384SN/A{ 1342685Ssaidi@eecs.umich.edu 1352685Ssaidi@eecs.umich.edu 1362685Ssaidi@eecs.umich.edu if (pkt->result == Packet::Nacked) { 1372685Ssaidi@eecs.umich.edu DPRINTF(DMA, "Received nacked Pkt %#x with State: %#x Addr: %#x\n", 1382685Ssaidi@eecs.umich.edu pkt, pkt->senderState, pkt->getAddr()); 1392685Ssaidi@eecs.umich.edu pkt->reinitNacked(); 1402685Ssaidi@eecs.umich.edu sendDma(pkt, true); 1412685Ssaidi@eecs.umich.edu } else if (pkt->senderState) { 1422565SN/A DmaReqState *state; 1432685Ssaidi@eecs.umich.edu DPRINTF(DMA, "Received response Pkt %#x with State: %#x Addr: %#x\n", 1442685Ssaidi@eecs.umich.edu pkt, pkt->senderState, pkt->getAddr()); 1452641Sstever@eecs.umich.edu state = dynamic_cast<DmaReqState*>(pkt->senderState); 1462685Ssaidi@eecs.umich.edu pendingCount--; 1472685Ssaidi@eecs.umich.edu 1482685Ssaidi@eecs.umich.edu assert(pendingCount >= 0); 1492657Ssaidi@eecs.umich.edu assert(state); 1502685Ssaidi@eecs.umich.edu 1512685Ssaidi@eecs.umich.edu state->numBytes += pkt->req->getSize(); 1522685Ssaidi@eecs.umich.edu if (state->totBytes == state->numBytes) { 1532685Ssaidi@eecs.umich.edu state->completionEvent->process(); 1542685Ssaidi@eecs.umich.edu delete state; 1552685Ssaidi@eecs.umich.edu } 1562630SN/A delete pkt->req; 1572630SN/A delete pkt; 1582569SN/A } else { 1592685Ssaidi@eecs.umich.edu panic("Got packet without sender state... huh?\n"); 1602565SN/A } 1612569SN/A 1622657Ssaidi@eecs.umich.edu return true; 1632384SN/A} 164679SN/A 1652521SN/ADmaDevice::DmaDevice(Params *p) 1662565SN/A : PioDevice(p), dmaPort(NULL) 1672565SN/A{ } 1682384SN/A 1692384SN/Avoid 1702489SN/ADmaPort::recvRetry() 1712489SN/A{ 1722489SN/A Packet* pkt = transmitList.front(); 1732659Ssaidi@eecs.umich.edu bool result = true; 1742659Ssaidi@eecs.umich.edu while (result && transmitList.size()) { 1752659Ssaidi@eecs.umich.edu DPRINTF(DMA, "Retry on Packet %#x with senderState: %#x\n", 1762659Ssaidi@eecs.umich.edu pkt, pkt->senderState); 1772659Ssaidi@eecs.umich.edu result = sendTiming(pkt); 1782659Ssaidi@eecs.umich.edu if (result) { 1792659Ssaidi@eecs.umich.edu DPRINTF(DMA, "-- Done\n"); 1802659Ssaidi@eecs.umich.edu transmitList.pop_front(); 1812659Ssaidi@eecs.umich.edu } else { 1822659Ssaidi@eecs.umich.edu DPRINTF(DMA, "-- Failed, queued\n"); 1832659Ssaidi@eecs.umich.edu } 1842657Ssaidi@eecs.umich.edu } 1852489SN/A} 1862641Sstever@eecs.umich.edu 1872641Sstever@eecs.umich.edu 1882489SN/Avoid 1892641Sstever@eecs.umich.eduDmaPort::dmaAction(Packet::Command cmd, Addr addr, int size, Event *event, 1902641Sstever@eecs.umich.edu uint8_t *data) 1912384SN/A{ 1922384SN/A assert(event); 1932384SN/A 1942685Ssaidi@eecs.umich.edu DmaReqState *reqState = new DmaReqState(event, this, size); 1952384SN/A 1962406SN/A for (ChunkGenerator gen(addr, size, peerBlockSize()); 1972406SN/A !gen.done(); gen.next()) { 1982663Sstever@eecs.umich.edu Request *req = new Request(gen.addr(), gen.size(), 0); 1992641Sstever@eecs.umich.edu Packet *pkt = new Packet(req, cmd, Packet::Broadcast); 2002641Sstever@eecs.umich.edu 2012384SN/A // Increment the data pointer on a write 2022566SN/A if (data) 2032685Ssaidi@eecs.umich.edu pkt->dataStatic(data + gen.complete()); 2042641Sstever@eecs.umich.edu 2052685Ssaidi@eecs.umich.edu pkt->senderState = reqState; 2062641Sstever@eecs.umich.edu 2072565SN/A assert(pendingCount >= 0); 2082565SN/A pendingCount++; 2092566SN/A sendDma(pkt); 2102384SN/A } 2112384SN/A} 2122384SN/A 2132384SN/A 2142384SN/Avoid 2152685Ssaidi@eecs.umich.eduDmaPort::sendDma(Packet *pkt, bool front) 2162384SN/A{ 2172384SN/A // some kind of selction between access methods 2182384SN/A // more work is going to have to be done to make 2192384SN/A // switching actually work 2202489SN/A /* MemState state = device->platform->system->memState; 2212384SN/A 2222657Ssaidi@eecs.umich.edu if (state == Timing) { */ 2232685Ssaidi@eecs.umich.edu DPRINTF(DMA, "Attempting to send Packet %#x with addr: %#x\n", 2242685Ssaidi@eecs.umich.edu pkt, pkt->getAddr()); 2252659Ssaidi@eecs.umich.edu if (transmitList.size() || !sendTiming(pkt)) { 2262685Ssaidi@eecs.umich.edu if (front) 2272685Ssaidi@eecs.umich.edu transmitList.push_front(pkt); 2282685Ssaidi@eecs.umich.edu else 2292685Ssaidi@eecs.umich.edu transmitList.push_back(pkt); 2302657Ssaidi@eecs.umich.edu DPRINTF(DMA, "-- Failed: queued\n"); 2312657Ssaidi@eecs.umich.edu } else { 2322657Ssaidi@eecs.umich.edu DPRINTF(DMA, "-- Done\n"); 2332657Ssaidi@eecs.umich.edu } 2342657Ssaidi@eecs.umich.edu /* } else if (state == Atomic) { 2352630SN/A sendAtomic(pkt); 2362566SN/A if (pkt->senderState) { 2372641Sstever@eecs.umich.edu DmaReqState *state = dynamic_cast<DmaReqState*>(pkt->senderState); 2382657Ssaidi@eecs.umich.edu assert(state); 2392685Ssaidi@eecs.umich.edu state->completionEvent->schedule(curTick + (pkt->time - 2402685Ssaidi@eecs.umich.edu pkt->req->getTime()) +1); 2412685Ssaidi@eecs.umich.edu delete state; 2422565SN/A } 2432566SN/A pendingCount--; 2442566SN/A assert(pendingCount >= 0); 2452566SN/A delete pkt->req; 2462566SN/A delete pkt; 2472566SN/A 2482657Ssaidi@eecs.umich.edu } else if (state == Functional) { 2492384SN/A sendFunctional(pkt); 2502384SN/A // Is this correct??? 2512630SN/A completionEvent->schedule(pkt->req->responseTime - pkt->req->requestTime); 2522384SN/A completionEvent == NULL; 2532384SN/A } else 2542384SN/A panic("Unknown memory command state."); 2552489SN/A */ 2562384SN/A} 257545SN/A 258545SN/ADmaDevice::~DmaDevice() 259545SN/A{ 2602489SN/A if (dmaPort) 2612489SN/A delete dmaPort; 262545SN/A} 263545SN/A 264679SN/A 265