bridge.cc revision 9549
12568SN/A/* 28922Swilliam.wang@arm.com * Copyright (c) 2011-2012 ARM Limited 38713Sandreas.hansson@arm.com * All rights reserved 48713Sandreas.hansson@arm.com * 58713Sandreas.hansson@arm.com * The license below extends only to copyright in the software and shall 68713Sandreas.hansson@arm.com * not be construed as granting a license to any other intellectual 78713Sandreas.hansson@arm.com * property including but not limited to intellectual property relating 88713Sandreas.hansson@arm.com * to a hardware implementation of the functionality of the software 98713Sandreas.hansson@arm.com * licensed hereunder. You may use the software subject to the license 108713Sandreas.hansson@arm.com * terms below provided that you ensure that this notice is replicated 118713Sandreas.hansson@arm.com * unmodified and in its entirety in all distributions of the software, 128713Sandreas.hansson@arm.com * modified or unmodified, in source code or in binary form. 138713Sandreas.hansson@arm.com * 142568SN/A * Copyright (c) 2006 The Regents of The University of Michigan 152568SN/A * All rights reserved. 162568SN/A * 172568SN/A * Redistribution and use in source and binary forms, with or without 182568SN/A * modification, are permitted provided that the following conditions are 192568SN/A * met: redistributions of source code must retain the above copyright 202568SN/A * notice, this list of conditions and the following disclaimer; 212568SN/A * redistributions in binary form must reproduce the above copyright 222568SN/A * notice, this list of conditions and the following disclaimer in the 232568SN/A * documentation and/or other materials provided with the distribution; 242568SN/A * neither the name of the copyright holders nor the names of its 252568SN/A * contributors may be used to endorse or promote products derived from 262568SN/A * this software without specific prior written permission. 272568SN/A * 282568SN/A * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 292568SN/A * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 302568SN/A * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 312568SN/A * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 322568SN/A * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 332568SN/A * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 342568SN/A * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 352568SN/A * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 362568SN/A * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 372568SN/A * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 382568SN/A * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 392665Ssaidi@eecs.umich.edu * 402665Ssaidi@eecs.umich.edu * Authors: Ali Saidi 412665Ssaidi@eecs.umich.edu * Steve Reinhardt 428713Sandreas.hansson@arm.com * Andreas Hansson 432568SN/A */ 442568SN/A 452568SN/A/** 462982Sstever@eecs.umich.edu * @file 478713Sandreas.hansson@arm.com * Implementation of a memory-mapped bus bridge that connects a master 488713Sandreas.hansson@arm.com * and a slave through a request and response queue. 492568SN/A */ 502568SN/A 512568SN/A#include "base/trace.hh" 529164Sandreas.hansson@arm.com#include "debug/Bridge.hh" 532568SN/A#include "mem/bridge.hh" 544762Snate@binkert.org#include "params/Bridge.hh" 552568SN/A 569164Sandreas.hansson@arm.comBridge::BridgeSlavePort::BridgeSlavePort(const std::string& _name, 579164Sandreas.hansson@arm.com Bridge& _bridge, 588851Sandreas.hansson@arm.com BridgeMasterPort& _masterPort, 599180Sandreas.hansson@arm.com Cycles _delay, int _resp_limit, 609235Sandreas.hansson@arm.com std::vector<AddrRange> _ranges) 619164Sandreas.hansson@arm.com : SlavePort(_name, &_bridge), bridge(_bridge), masterPort(_masterPort), 629164Sandreas.hansson@arm.com delay(_delay), ranges(_ranges.begin(), _ranges.end()), 639164Sandreas.hansson@arm.com outstandingResponses(0), retryReq(false), 648851Sandreas.hansson@arm.com respQueueLimit(_resp_limit), sendEvent(*this) 658713Sandreas.hansson@arm.com{ 668713Sandreas.hansson@arm.com} 678713Sandreas.hansson@arm.com 689164Sandreas.hansson@arm.comBridge::BridgeMasterPort::BridgeMasterPort(const std::string& _name, 699164Sandreas.hansson@arm.com Bridge& _bridge, 708851Sandreas.hansson@arm.com BridgeSlavePort& _slavePort, 719180Sandreas.hansson@arm.com Cycles _delay, int _req_limit) 729164Sandreas.hansson@arm.com : MasterPort(_name, &_bridge), bridge(_bridge), slavePort(_slavePort), 739164Sandreas.hansson@arm.com delay(_delay), reqQueueLimit(_req_limit), sendEvent(*this) 742643Sstever@eecs.umich.edu{ 752643Sstever@eecs.umich.edu} 762643Sstever@eecs.umich.edu 774435Ssaidi@eecs.umich.eduBridge::Bridge(Params *p) 785034Smilesck@eecs.umich.edu : MemObject(p), 799180Sandreas.hansson@arm.com slavePort(p->name + ".slave", *this, masterPort, 809180Sandreas.hansson@arm.com ticksToCycles(p->delay), p->resp_size, p->ranges), 819180Sandreas.hansson@arm.com masterPort(p->name + ".master", *this, slavePort, 829180Sandreas.hansson@arm.com ticksToCycles(p->delay), p->req_size) 832643Sstever@eecs.umich.edu{ 842643Sstever@eecs.umich.edu} 852643Sstever@eecs.umich.edu 869294Sandreas.hansson@arm.comBaseMasterPort& 879294Sandreas.hansson@arm.comBridge::getMasterPort(const std::string &if_name, PortID idx) 888922Swilliam.wang@arm.com{ 898922Swilliam.wang@arm.com if (if_name == "master") 908922Swilliam.wang@arm.com return masterPort; 918922Swilliam.wang@arm.com else 928922Swilliam.wang@arm.com // pass it along to our super class 938922Swilliam.wang@arm.com return MemObject::getMasterPort(if_name, idx); 948922Swilliam.wang@arm.com} 958922Swilliam.wang@arm.com 969294Sandreas.hansson@arm.comBaseSlavePort& 979294Sandreas.hansson@arm.comBridge::getSlavePort(const std::string &if_name, PortID idx) 982643Sstever@eecs.umich.edu{ 998713Sandreas.hansson@arm.com if (if_name == "slave") 1008922Swilliam.wang@arm.com return slavePort; 1018922Swilliam.wang@arm.com else 1028922Swilliam.wang@arm.com // pass it along to our super class 1038922Swilliam.wang@arm.com return MemObject::getSlavePort(if_name, idx); 1042643Sstever@eecs.umich.edu} 1052643Sstever@eecs.umich.edu 1062568SN/Avoid 1072568SN/ABridge::init() 1082568SN/A{ 1098713Sandreas.hansson@arm.com // make sure both sides are connected and have the same block size 1108713Sandreas.hansson@arm.com if (!slavePort.isConnected() || !masterPort.isConnected()) 1114432Ssaidi@eecs.umich.edu fatal("Both ports of bus bridge are not connected to a bus.\n"); 1124432Ssaidi@eecs.umich.edu 1138713Sandreas.hansson@arm.com if (slavePort.peerBlockSize() != masterPort.peerBlockSize()) 1148713Sandreas.hansson@arm.com fatal("Slave port size %d, master port size %d \n " \ 1156764SBrad.Beckmann@amd.com "Busses don't have the same block size... Not supported.\n", 1168713Sandreas.hansson@arm.com slavePort.peerBlockSize(), masterPort.peerBlockSize()); 1178713Sandreas.hansson@arm.com 1188713Sandreas.hansson@arm.com // notify the master side of our address ranges 1198713Sandreas.hansson@arm.com slavePort.sendRangeChange(); 1202568SN/A} 1212568SN/A 1224433Ssaidi@eecs.umich.edubool 1238713Sandreas.hansson@arm.comBridge::BridgeSlavePort::respQueueFull() 1244433Ssaidi@eecs.umich.edu{ 1258713Sandreas.hansson@arm.com return outstandingResponses == respQueueLimit; 1264435Ssaidi@eecs.umich.edu} 1274435Ssaidi@eecs.umich.edu 1284435Ssaidi@eecs.umich.edubool 1298713Sandreas.hansson@arm.comBridge::BridgeMasterPort::reqQueueFull() 1304435Ssaidi@eecs.umich.edu{ 1319164Sandreas.hansson@arm.com return transmitList.size() == reqQueueLimit; 1324433Ssaidi@eecs.umich.edu} 1332568SN/A 1342568SN/Abool 1358975Sandreas.hansson@arm.comBridge::BridgeMasterPort::recvTimingResp(PacketPtr pkt) 1362568SN/A{ 1378713Sandreas.hansson@arm.com // all checks are done when the request is accepted on the slave 1388713Sandreas.hansson@arm.com // side, so we are guaranteed to have space for the response 1399164Sandreas.hansson@arm.com DPRINTF(Bridge, "recvTimingResp: %s addr 0x%x\n", 1408949Sandreas.hansson@arm.com pkt->cmdString(), pkt->getAddr()); 1412643Sstever@eecs.umich.edu 1429164Sandreas.hansson@arm.com DPRINTF(Bridge, "Request queue size: %d\n", transmitList.size()); 1434450Ssaidi@eecs.umich.edu 1449549Sandreas.hansson@arm.com // @todo: We need to pay for this and not just zero it out 1459549Sandreas.hansson@arm.com pkt->busFirstWordDelay = pkt->busLastWordDelay = 0; 1469549Sandreas.hansson@arm.com 1479180Sandreas.hansson@arm.com slavePort.schedTimingResp(pkt, bridge.clockEdge(delay)); 1488713Sandreas.hansson@arm.com 1498713Sandreas.hansson@arm.com return true; 1508713Sandreas.hansson@arm.com} 1518713Sandreas.hansson@arm.com 1528713Sandreas.hansson@arm.combool 1538975Sandreas.hansson@arm.comBridge::BridgeSlavePort::recvTimingReq(PacketPtr pkt) 1548713Sandreas.hansson@arm.com{ 1559164Sandreas.hansson@arm.com DPRINTF(Bridge, "recvTimingReq: %s addr 0x%x\n", 1568949Sandreas.hansson@arm.com pkt->cmdString(), pkt->getAddr()); 1578713Sandreas.hansson@arm.com 1589164Sandreas.hansson@arm.com // ensure we do not have something waiting to retry 1599164Sandreas.hansson@arm.com if(retryReq) 1609164Sandreas.hansson@arm.com return false; 1619164Sandreas.hansson@arm.com 1629164Sandreas.hansson@arm.com DPRINTF(Bridge, "Response queue size: %d outresp: %d\n", 1639164Sandreas.hansson@arm.com transmitList.size(), outstandingResponses); 1648713Sandreas.hansson@arm.com 1658851Sandreas.hansson@arm.com if (masterPort.reqQueueFull()) { 1669164Sandreas.hansson@arm.com DPRINTF(Bridge, "Request queue full\n"); 1679164Sandreas.hansson@arm.com retryReq = true; 1689164Sandreas.hansson@arm.com } else if (pkt->needsResponse()) { 1694435Ssaidi@eecs.umich.edu if (respQueueFull()) { 1709164Sandreas.hansson@arm.com DPRINTF(Bridge, "Response queue full\n"); 1719164Sandreas.hansson@arm.com retryReq = true; 1724433Ssaidi@eecs.umich.edu } else { 1739164Sandreas.hansson@arm.com DPRINTF(Bridge, "Reserving space for response\n"); 1748713Sandreas.hansson@arm.com assert(outstandingResponses != respQueueLimit); 1754433Ssaidi@eecs.umich.edu ++outstandingResponses; 1769164Sandreas.hansson@arm.com retryReq = false; 1779549Sandreas.hansson@arm.com 1789549Sandreas.hansson@arm.com // @todo: We need to pay for this and not just zero it out 1799549Sandreas.hansson@arm.com pkt->busFirstWordDelay = pkt->busLastWordDelay = 0; 1809549Sandreas.hansson@arm.com 1819180Sandreas.hansson@arm.com masterPort.schedTimingReq(pkt, bridge.clockEdge(delay)); 1824433Ssaidi@eecs.umich.edu } 1835562Snate@binkert.org } 1844433Ssaidi@eecs.umich.edu 1859164Sandreas.hansson@arm.com // remember that we are now stalling a packet and that we have to 1869164Sandreas.hansson@arm.com // tell the sending master to retry once space becomes available, 1879164Sandreas.hansson@arm.com // we make no distinction whether the stalling is due to the 1889164Sandreas.hansson@arm.com // request queue or response queue being full 1899164Sandreas.hansson@arm.com return !retryReq; 1902657Ssaidi@eecs.umich.edu} 1912657Ssaidi@eecs.umich.edu 1924433Ssaidi@eecs.umich.eduvoid 1939164Sandreas.hansson@arm.comBridge::BridgeSlavePort::retryStalledReq() 1944433Ssaidi@eecs.umich.edu{ 1959164Sandreas.hansson@arm.com if (retryReq) { 1969164Sandreas.hansson@arm.com DPRINTF(Bridge, "Request waiting for retry, now retrying\n"); 1979164Sandreas.hansson@arm.com retryReq = false; 1989164Sandreas.hansson@arm.com sendRetry(); 1994433Ssaidi@eecs.umich.edu } 2004433Ssaidi@eecs.umich.edu} 2014433Ssaidi@eecs.umich.edu 2024433Ssaidi@eecs.umich.eduvoid 2039164Sandreas.hansson@arm.comBridge::BridgeMasterPort::schedTimingReq(PacketPtr pkt, Tick when) 2042657Ssaidi@eecs.umich.edu{ 2059029Sandreas.hansson@arm.com // If we expect to see a response, we need to restore the source 2069029Sandreas.hansson@arm.com // and destination field that is potentially changed by a second 2079029Sandreas.hansson@arm.com // bus 2089029Sandreas.hansson@arm.com if (!pkt->memInhibitAsserted() && pkt->needsResponse()) { 2099029Sandreas.hansson@arm.com // Update the sender state so we can deal with the response 2109029Sandreas.hansson@arm.com // appropriately 2119542Sandreas.hansson@arm.com pkt->pushSenderState(new RequestState(pkt->getSrc())); 2129029Sandreas.hansson@arm.com } 2132643Sstever@eecs.umich.edu 2142643Sstever@eecs.umich.edu // If we're about to put this packet at the head of the queue, we 2152643Sstever@eecs.umich.edu // need to schedule an event to do the transmit. Otherwise there 2162643Sstever@eecs.umich.edu // should already be an event scheduled for sending the head 2172643Sstever@eecs.umich.edu // packet. 2189164Sandreas.hansson@arm.com if (transmitList.empty()) { 2199164Sandreas.hansson@arm.com bridge.schedule(sendEvent, when); 2202568SN/A } 2218713Sandreas.hansson@arm.com 2229164Sandreas.hansson@arm.com assert(transmitList.size() != reqQueueLimit); 2238713Sandreas.hansson@arm.com 2249164Sandreas.hansson@arm.com transmitList.push_back(DeferredPacket(pkt, when)); 2258713Sandreas.hansson@arm.com} 2268713Sandreas.hansson@arm.com 2278713Sandreas.hansson@arm.com 2288713Sandreas.hansson@arm.comvoid 2299164Sandreas.hansson@arm.comBridge::BridgeSlavePort::schedTimingResp(PacketPtr pkt, Tick when) 2308713Sandreas.hansson@arm.com{ 2318713Sandreas.hansson@arm.com // This is a response for a request we forwarded earlier. The 2329029Sandreas.hansson@arm.com // corresponding request state should be stored in the packet's 2338713Sandreas.hansson@arm.com // senderState field. 2349542Sandreas.hansson@arm.com RequestState *req_state = 2359542Sandreas.hansson@arm.com dynamic_cast<RequestState*>(pkt->popSenderState()); 2369029Sandreas.hansson@arm.com assert(req_state != NULL); 2379542Sandreas.hansson@arm.com pkt->setDest(req_state->origSrc); 2389164Sandreas.hansson@arm.com delete req_state; 2398713Sandreas.hansson@arm.com 2408949Sandreas.hansson@arm.com // the bridge assumes that at least one bus has set the 2418949Sandreas.hansson@arm.com // destination field of the packet 2428949Sandreas.hansson@arm.com assert(pkt->isDestValid()); 2439164Sandreas.hansson@arm.com DPRINTF(Bridge, "response, new dest %d\n", pkt->getDest()); 2448713Sandreas.hansson@arm.com 2458713Sandreas.hansson@arm.com // If we're about to put this packet at the head of the queue, we 2468713Sandreas.hansson@arm.com // need to schedule an event to do the transmit. Otherwise there 2478713Sandreas.hansson@arm.com // should already be an event scheduled for sending the head 2488713Sandreas.hansson@arm.com // packet. 2499164Sandreas.hansson@arm.com if (transmitList.empty()) { 2509164Sandreas.hansson@arm.com bridge.schedule(sendEvent, when); 2518713Sandreas.hansson@arm.com } 2529164Sandreas.hansson@arm.com 2539164Sandreas.hansson@arm.com transmitList.push_back(DeferredPacket(pkt, when)); 2542568SN/A} 2552568SN/A 2562568SN/Avoid 2579164Sandreas.hansson@arm.comBridge::BridgeMasterPort::trySendTiming() 2582568SN/A{ 2599164Sandreas.hansson@arm.com assert(!transmitList.empty()); 2602568SN/A 2619164Sandreas.hansson@arm.com DeferredPacket req = transmitList.front(); 2622643Sstever@eecs.umich.edu 2639164Sandreas.hansson@arm.com assert(req.tick <= curTick()); 2642643Sstever@eecs.umich.edu 2659029Sandreas.hansson@arm.com PacketPtr pkt = req.pkt; 2662643Sstever@eecs.umich.edu 2679164Sandreas.hansson@arm.com DPRINTF(Bridge, "trySend request addr 0x%x, queue size %d\n", 2689164Sandreas.hansson@arm.com pkt->getAddr(), transmitList.size()); 2694432Ssaidi@eecs.umich.edu 2708975Sandreas.hansson@arm.com if (sendTimingReq(pkt)) { 2712643Sstever@eecs.umich.edu // send successful 2729164Sandreas.hansson@arm.com transmitList.pop_front(); 2739164Sandreas.hansson@arm.com DPRINTF(Bridge, "trySend request successful\n"); 2742657Ssaidi@eecs.umich.edu 2752657Ssaidi@eecs.umich.edu // If there are more packets to send, schedule event to try again. 2769164Sandreas.hansson@arm.com if (!transmitList.empty()) { 2779164Sandreas.hansson@arm.com req = transmitList.front(); 2789164Sandreas.hansson@arm.com DPRINTF(Bridge, "Scheduling next send\n"); 2799164Sandreas.hansson@arm.com bridge.schedule(sendEvent, std::max(req.tick, 2809164Sandreas.hansson@arm.com bridge.nextCycle())); 2812657Ssaidi@eecs.umich.edu } 2829164Sandreas.hansson@arm.com 2839164Sandreas.hansson@arm.com // if we have stalled a request due to a full request queue, 2849164Sandreas.hansson@arm.com // then send a retry at this point, also note that if the 2859164Sandreas.hansson@arm.com // request we stalled was waiting for the response queue 2869164Sandreas.hansson@arm.com // rather than the request queue we might stall it again 2879164Sandreas.hansson@arm.com slavePort.retryStalledReq(); 2882643Sstever@eecs.umich.edu } 2894986Ssaidi@eecs.umich.edu 2909164Sandreas.hansson@arm.com // if the send failed, then we try again once we receive a retry, 2919164Sandreas.hansson@arm.com // and therefore there is no need to take any action 2922568SN/A} 2932568SN/A 2948713Sandreas.hansson@arm.comvoid 2959164Sandreas.hansson@arm.comBridge::BridgeSlavePort::trySendTiming() 2968713Sandreas.hansson@arm.com{ 2979164Sandreas.hansson@arm.com assert(!transmitList.empty()); 2988713Sandreas.hansson@arm.com 2999164Sandreas.hansson@arm.com DeferredPacket resp = transmitList.front(); 3008713Sandreas.hansson@arm.com 3019164Sandreas.hansson@arm.com assert(resp.tick <= curTick()); 3028713Sandreas.hansson@arm.com 3039029Sandreas.hansson@arm.com PacketPtr pkt = resp.pkt; 3048713Sandreas.hansson@arm.com 3059164Sandreas.hansson@arm.com DPRINTF(Bridge, "trySend response addr 0x%x, outstanding %d\n", 3069164Sandreas.hansson@arm.com pkt->getAddr(), outstandingResponses); 3078713Sandreas.hansson@arm.com 3088975Sandreas.hansson@arm.com if (sendTimingResp(pkt)) { 3098713Sandreas.hansson@arm.com // send successful 3109164Sandreas.hansson@arm.com transmitList.pop_front(); 3119164Sandreas.hansson@arm.com DPRINTF(Bridge, "trySend response successful\n"); 3128713Sandreas.hansson@arm.com 3139164Sandreas.hansson@arm.com assert(outstandingResponses != 0); 3149164Sandreas.hansson@arm.com --outstandingResponses; 3159164Sandreas.hansson@arm.com 3169164Sandreas.hansson@arm.com // If there are more packets to send, schedule event to try again. 3179164Sandreas.hansson@arm.com if (!transmitList.empty()) { 3189164Sandreas.hansson@arm.com resp = transmitList.front(); 3199164Sandreas.hansson@arm.com DPRINTF(Bridge, "Scheduling next send\n"); 3209164Sandreas.hansson@arm.com bridge.schedule(sendEvent, std::max(resp.tick, 3219164Sandreas.hansson@arm.com bridge.nextCycle())); 3228713Sandreas.hansson@arm.com } 3238713Sandreas.hansson@arm.com 3249164Sandreas.hansson@arm.com // if there is space in the request queue and we were stalling 3259164Sandreas.hansson@arm.com // a request, it will definitely be possible to accept it now 3269164Sandreas.hansson@arm.com // since there is guaranteed space in the response queue 3279164Sandreas.hansson@arm.com if (!masterPort.reqQueueFull() && retryReq) { 3289164Sandreas.hansson@arm.com DPRINTF(Bridge, "Request waiting for retry, now retrying\n"); 3299164Sandreas.hansson@arm.com retryReq = false; 3309164Sandreas.hansson@arm.com sendRetry(); 3318713Sandreas.hansson@arm.com } 3328713Sandreas.hansson@arm.com } 3338713Sandreas.hansson@arm.com 3349164Sandreas.hansson@arm.com // if the send failed, then we try again once we receive a retry, 3359164Sandreas.hansson@arm.com // and therefore there is no need to take any action 3368713Sandreas.hansson@arm.com} 3372568SN/A 3382657Ssaidi@eecs.umich.eduvoid 3398713Sandreas.hansson@arm.comBridge::BridgeMasterPort::recvRetry() 3402568SN/A{ 3419164Sandreas.hansson@arm.com Tick nextReady = transmitList.front().tick; 3427823Ssteve.reinhardt@amd.com if (nextReady <= curTick()) 3439164Sandreas.hansson@arm.com trySendTiming(); 3444435Ssaidi@eecs.umich.edu else 3459164Sandreas.hansson@arm.com bridge.schedule(sendEvent, nextReady); 3462568SN/A} 3472568SN/A 3488713Sandreas.hansson@arm.comvoid 3498713Sandreas.hansson@arm.comBridge::BridgeSlavePort::recvRetry() 3502568SN/A{ 3519164Sandreas.hansson@arm.com Tick nextReady = transmitList.front().tick; 3528713Sandreas.hansson@arm.com if (nextReady <= curTick()) 3539164Sandreas.hansson@arm.com trySendTiming(); 3548713Sandreas.hansson@arm.com else 3559164Sandreas.hansson@arm.com bridge.schedule(sendEvent, nextReady); 3562568SN/A} 3572568SN/A 3588713Sandreas.hansson@arm.comTick 3598713Sandreas.hansson@arm.comBridge::BridgeSlavePort::recvAtomic(PacketPtr pkt) 3608713Sandreas.hansson@arm.com{ 3619180Sandreas.hansson@arm.com return delay * bridge.clockPeriod() + masterPort.sendAtomic(pkt); 3628713Sandreas.hansson@arm.com} 3638713Sandreas.hansson@arm.com 3642568SN/Avoid 3658713Sandreas.hansson@arm.comBridge::BridgeSlavePort::recvFunctional(PacketPtr pkt) 3662568SN/A{ 3679164Sandreas.hansson@arm.com std::list<DeferredPacket>::iterator i; 3682568SN/A 3695314Sstever@gmail.com pkt->pushLabel(name()); 3705314Sstever@gmail.com 3718713Sandreas.hansson@arm.com // check the response queue 3729164Sandreas.hansson@arm.com for (i = transmitList.begin(); i != transmitList.end(); ++i) { 3739029Sandreas.hansson@arm.com if (pkt->checkFunctional((*i).pkt)) { 3747668Ssteve.reinhardt@amd.com pkt->makeResponse(); 3754626Sstever@eecs.umich.edu return; 3767668Ssteve.reinhardt@amd.com } 3772568SN/A } 3782568SN/A 3798713Sandreas.hansson@arm.com // also check the master port's request queue 3808851Sandreas.hansson@arm.com if (masterPort.checkFunctional(pkt)) { 3818713Sandreas.hansson@arm.com return; 3828713Sandreas.hansson@arm.com } 3838713Sandreas.hansson@arm.com 3845314Sstever@gmail.com pkt->popLabel(); 3855314Sstever@gmail.com 3864626Sstever@eecs.umich.edu // fall through if pkt still not satisfied 3878851Sandreas.hansson@arm.com masterPort.sendFunctional(pkt); 3888713Sandreas.hansson@arm.com} 3898713Sandreas.hansson@arm.com 3908713Sandreas.hansson@arm.combool 3918713Sandreas.hansson@arm.comBridge::BridgeMasterPort::checkFunctional(PacketPtr pkt) 3928713Sandreas.hansson@arm.com{ 3938713Sandreas.hansson@arm.com bool found = false; 3949164Sandreas.hansson@arm.com std::list<DeferredPacket>::iterator i = transmitList.begin(); 3958713Sandreas.hansson@arm.com 3969164Sandreas.hansson@arm.com while(i != transmitList.end() && !found) { 3979029Sandreas.hansson@arm.com if (pkt->checkFunctional((*i).pkt)) { 3988713Sandreas.hansson@arm.com pkt->makeResponse(); 3998713Sandreas.hansson@arm.com found = true; 4008713Sandreas.hansson@arm.com } 4018713Sandreas.hansson@arm.com ++i; 4028713Sandreas.hansson@arm.com } 4038713Sandreas.hansson@arm.com 4048713Sandreas.hansson@arm.com return found; 4052568SN/A} 4062568SN/A 4078711Sandreas.hansson@arm.comAddrRangeList 4089090Sandreas.hansson@arm.comBridge::BridgeSlavePort::getAddrRanges() const 4092568SN/A{ 4108711Sandreas.hansson@arm.com return ranges; 4112568SN/A} 4122568SN/A 4134762Snate@binkert.orgBridge * 4144762Snate@binkert.orgBridgeParams::create() 4152568SN/A{ 4164762Snate@binkert.org return new Bridge(this); 4172568SN/A} 418