xbar.cc revision 10414:3dabe649f1df
12292SN/A/* 22329SN/A * Copyright (c) 2011-2014 ARM Limited 32292SN/A * All rights reserved 42292SN/A * 52292SN/A * The license below extends only to copyright in the software and shall 62292SN/A * not be construed as granting a license to any other intellectual 72292SN/A * property including but not limited to intellectual property relating 82292SN/A * to a hardware implementation of the functionality of the software 92292SN/A * licensed hereunder. You may use the software subject to the license 102292SN/A * terms below provided that you ensure that this notice is replicated 112292SN/A * unmodified and in its entirety in all distributions of the software, 122292SN/A * modified or unmodified, in source code or in binary form. 132292SN/A * 142292SN/A * Copyright (c) 2006 The Regents of The University of Michigan 152292SN/A * All rights reserved. 162292SN/A * 172292SN/A * Redistribution and use in source and binary forms, with or without 182292SN/A * modification, are permitted provided that the following conditions are 192292SN/A * met: redistributions of source code must retain the above copyright 202292SN/A * notice, this list of conditions and the following disclaimer; 212292SN/A * redistributions in binary form must reproduce the above copyright 222292SN/A * notice, this list of conditions and the following disclaimer in the 232292SN/A * documentation and/or other materials provided with the distribution; 242292SN/A * neither the name of the copyright holders nor the names of its 252292SN/A * contributors may be used to endorse or promote products derived from 262292SN/A * this software without specific prior written permission. 272689Sktlim@umich.edu * 282689Sktlim@umich.edu * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 292689Sktlim@umich.edu * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 302292SN/A * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 312292SN/A * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 322292SN/A * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 332292SN/A * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 342292SN/A * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 352329SN/A * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 362292SN/A * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 372292SN/A * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 382292SN/A * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 392329SN/A * 403326Sktlim@umich.edu * Authors: Ali Saidi 412292SN/A * Andreas Hansson 422292SN/A * William Wang 432292SN/A */ 443348Sbinkertn@umich.edu 452669Sktlim@umich.edu/** 462292SN/A * @file 472292SN/A * Definition of a crossbar object. 482329SN/A */ 492329SN/A 502329SN/A#include "base/misc.hh" 512329SN/A#include "base/trace.hh" 522329SN/A#include "debug/AddrRanges.hh" 532329SN/A#include "debug/Drain.hh" 542329SN/A#include "debug/XBar.hh" 552329SN/A#include "mem/xbar.hh" 562329SN/A 572329SN/ABaseXBar::BaseXBar(const BaseXBarParams *p) 582292SN/A : MemObject(p), 592292SN/A headerCycles(p->header_cycles), width(p->width), 602292SN/A gotAddrRanges(p->port_default_connection_count + 612292SN/A p->port_master_connection_count, false), 622292SN/A gotAllAddrRanges(false), defaultPortID(InvalidPortID), 632292SN/A useDefaultRange(p->use_default_range) 642292SN/A{} 652733Sktlim@umich.edu 662292SN/ABaseXBar::~BaseXBar() 672292SN/A{ 682907Sktlim@umich.edu for (auto m: masterPorts) 692292SN/A delete m; 702292SN/A 712292SN/A for (auto s: slavePorts) 722292SN/A delete s; 732292SN/A} 742292SN/A 752292SN/Avoid 762907Sktlim@umich.eduBaseXBar::init() 772292SN/A{ 782292SN/A} 792292SN/A 802292SN/ABaseMasterPort & 812292SN/ABaseXBar::getMasterPort(const std::string &if_name, PortID idx) 822727Sktlim@umich.edu{ 832727Sktlim@umich.edu if (if_name == "master" && idx < masterPorts.size()) { 842727Sktlim@umich.edu // the master port index translates directly to the vector position 852292SN/A return *masterPorts[idx]; 862733Sktlim@umich.edu } else if (if_name == "default") { 872292SN/A return *masterPorts[defaultPortID]; 882292SN/A } else { 892292SN/A return MemObject::getMasterPort(if_name, idx); 902292SN/A } 912292SN/A} 922907Sktlim@umich.edu 932907Sktlim@umich.eduBaseSlavePort & 942907Sktlim@umich.eduBaseXBar::getSlavePort(const std::string &if_name, PortID idx) 952907Sktlim@umich.edu{ 962348SN/A if (if_name == "slave" && idx < slavePorts.size()) { 972307SN/A // the slave port index translates directly to the vector position 982307SN/A return *slavePorts[idx]; 992348SN/A } else { 1002307SN/A return MemObject::getSlavePort(if_name, idx); 1012307SN/A } 1022348SN/A} 1032307SN/A 1042307SN/Avoid 1052292SN/ABaseXBar::calcPacketTiming(PacketPtr pkt) 1062292SN/A{ 1072292SN/A // the crossbar will be called at a time that is not necessarily 1082292SN/A // coinciding with its own clock, so start by determining how long 1092292SN/A // until the next clock edge (could be zero) 1102292SN/A Tick offset = clockEdge() - curTick(); 1112292SN/A 1122292SN/A // determine how many cycles are needed to send the data 1132292SN/A unsigned dataCycles = pkt->hasData() ? divCeil(pkt->getSize(), width) : 0; 1142292SN/A 1152292SN/A // before setting the bus delay fields of the packet, ensure that 1162292SN/A // the delay from any previous crossbar has been accounted for 1172292SN/A if (pkt->firstWordDelay != 0 || pkt->lastWordDelay != 0) 1182292SN/A panic("Packet %s already has delay (%d, %d) that should be " 1192292SN/A "accounted for.\n", pkt->cmdString(), pkt->firstWordDelay, 1202292SN/A pkt->lastWordDelay); 1212292SN/A 1222329SN/A // The first word will be delivered on the cycle after the header. 1232292SN/A pkt->firstWordDelay = (headerCycles + 1) * clockPeriod() + offset; 1242292SN/A 1252292SN/A // Note that currently lastWordDelay can be smaller than 1262292SN/A // firstWordDelay if the packet has no data 1272292SN/A pkt->lastWordDelay = (headerCycles + dataCycles) * clockPeriod() + 1282292SN/A offset; 1292292SN/A} 1302292SN/A 1312292SN/Atemplate <typename SrcType, typename DstType> 1322292SN/ABaseXBar::Layer<SrcType,DstType>::Layer(DstType& _port, BaseXBar& _xbar, 1332292SN/A const std::string& _name) : 1342292SN/A port(_port), xbar(_xbar), _name(_name), state(IDLE), drainManager(NULL), 1352292SN/A waitingForPeer(NULL), releaseEvent(this) 1362292SN/A{ 1372790Sktlim@umich.edu} 1382790Sktlim@umich.edu 1392669Sktlim@umich.edutemplate <typename SrcType, typename DstType> 1402669Sktlim@umich.eduvoid BaseXBar::Layer<SrcType,DstType>::occupyLayer(Tick until) 1412292SN/A{ 1422292SN/A // ensure the state is busy at this point, as the layer should 1432292SN/A // transition from idle as soon as it has decided to forward the 1442292SN/A // packet to prevent any follow-on calls to sendTiming seeing an 1452292SN/A // unoccupied layer 1462292SN/A assert(state == BUSY); 1472292SN/A 1482292SN/A // until should never be 0 as express snoops never occupy the layer 1492292SN/A assert(until != 0); 1502292SN/A xbar.schedule(releaseEvent, until); 1512292SN/A 1522292SN/A // account for the occupied ticks 1532292SN/A occupancy += until - curTick(); 1542292SN/A 1552292SN/A DPRINTF(BaseXBar, "The crossbar layer is now busy from tick %d to %d\n", 1562292SN/A curTick(), until); 1572292SN/A} 1582292SN/A 1592292SN/Atemplate <typename SrcType, typename DstType> 1602292SN/Abool 1612292SN/ABaseXBar::Layer<SrcType,DstType>::tryTiming(SrcType* src_port) 1622292SN/A{ 1632292SN/A // if we are in the retry state, we will not see anything but the 1642329SN/A // retrying port (or in the case of the snoop ports the snoop 1652292SN/A // response port that mirrors the actual slave port) as we leave 1662292SN/A // this state again in zero time if the peer does not immediately 1672292SN/A // call the layer when receiving the retry 1682348SN/A 1692292SN/A // first we see if the layer is busy, next we check if the 1702292SN/A // destination port is already engaged in a transaction waiting 1712292SN/A // for a retry from the peer 1722348SN/A if (state == BUSY || waitingForPeer != NULL) { 1732292SN/A // the port should not be waiting already 1742292SN/A assert(std::find(waitingForLayer.begin(), waitingForLayer.end(), 1752292SN/A src_port) == waitingForLayer.end()); 1762348SN/A 1772292SN/A // put the port at the end of the retry list waiting for the 1782292SN/A // layer to be freed up (and in the case of a busy peer, for 1792292SN/A // that transaction to go through, and then the layer to free 1802292SN/A // up) 1812292SN/A waitingForLayer.push_back(src_port); 1822292SN/A return false; 1832292SN/A } 1842292SN/A 1852292SN/A state = BUSY; 1862292SN/A 1872292SN/A return true; 1882292SN/A} 1892292SN/A 1902292SN/Atemplate <typename SrcType, typename DstType> 1912292SN/Avoid 1922292SN/ABaseXBar::Layer<SrcType,DstType>::succeededTiming(Tick busy_time) 1932292SN/A{ 1942292SN/A // we should have gone from idle or retry to busy in the tryTiming 1952292SN/A // test 1962292SN/A assert(state == BUSY); 1972292SN/A 1982292SN/A // occupy the layer accordingly 1992292SN/A occupyLayer(busy_time); 2002292SN/A} 2012292SN/A 2022292SN/Atemplate <typename SrcType, typename DstType> 2032292SN/Avoid 2042292SN/ABaseXBar::Layer<SrcType,DstType>::failedTiming(SrcType* src_port, 2052292SN/A Tick busy_time) 2062292SN/A{ 2072292SN/A // ensure no one got in between and tried to send something to 2082292SN/A // this port 2092292SN/A assert(waitingForPeer == NULL); 2102292SN/A 2112292SN/A // if the source port is the current retrying one or not, we have 2122678Sktlim@umich.edu // failed in forwarding and should track that we are now waiting 2132678Sktlim@umich.edu // for the peer to send a retry 2142292SN/A waitingForPeer = src_port; 2152907Sktlim@umich.edu 2162907Sktlim@umich.edu // we should have gone from idle or retry to busy in the tryTiming 2172907Sktlim@umich.edu // test 2182292SN/A assert(state == BUSY); 2192698Sktlim@umich.edu 2202678Sktlim@umich.edu // occupy the bus accordingly 2212678Sktlim@umich.edu occupyLayer(busy_time); 2222698Sktlim@umich.edu} 2233349Sbinkertn@umich.edu 2242693Sktlim@umich.edutemplate <typename SrcType, typename DstType> 2252292SN/Avoid 2262292SN/ABaseXBar::Layer<SrcType,DstType>::releaseLayer() 2272292SN/A{ 2282292SN/A // releasing the bus means we should now be idle 2292292SN/A assert(state == BUSY); 2302292SN/A assert(!releaseEvent.scheduled()); 2312292SN/A 2322292SN/A // update the state 2332292SN/A state = IDLE; 2342292SN/A 2352292SN/A // bus layer is now idle, so if someone is waiting we can retry 2362292SN/A if (!waitingForLayer.empty()) { 2372329SN/A // there is no point in sending a retry if someone is still 2382329SN/A // waiting for the peer 2392329SN/A if (waitingForPeer == NULL) 2402329SN/A retryWaiting(); 2412292SN/A } else if (waitingForPeer == NULL && drainManager) { 2422292SN/A DPRINTF(Drain, "Crossbar done draining, signaling drain manager\n"); 2432733Sktlim@umich.edu //If we weren't able to drain before, do it now. 2442292SN/A drainManager->signalDrainDone(); 2452292SN/A // Clear the drain event once we're done with it. 2462292SN/A drainManager = NULL; 2472292SN/A } 2482907Sktlim@umich.edu} 2492907Sktlim@umich.edu 2502669Sktlim@umich.edutemplate <typename SrcType, typename DstType> 2512907Sktlim@umich.eduvoid 2522907Sktlim@umich.eduBaseXBar::Layer<SrcType,DstType>::retryWaiting() 2532292SN/A{ 2542698Sktlim@umich.edu // this should never be called with no one waiting 2552678Sktlim@umich.edu assert(!waitingForLayer.empty()); 2562678Sktlim@umich.edu 2572678Sktlim@umich.edu // we always go to retrying from idle 2582698Sktlim@umich.edu assert(state == IDLE); 2592678Sktlim@umich.edu 2602678Sktlim@umich.edu // update the state 2612678Sktlim@umich.edu state = RETRY; 2622678Sktlim@umich.edu 2632698Sktlim@umich.edu // set the retrying port to the front of the retry list and pop it 2642678Sktlim@umich.edu // off the list 2652698Sktlim@umich.edu SrcType* retryingPort = waitingForLayer.front(); 2662678Sktlim@umich.edu waitingForLayer.pop_front(); 2672698Sktlim@umich.edu 2682678Sktlim@umich.edu // tell the port to retry, which in some cases ends up calling the 2692698Sktlim@umich.edu // layer again 2702678Sktlim@umich.edu retryingPort->sendRetry(); 2712678Sktlim@umich.edu 2722678Sktlim@umich.edu // If the layer is still in the retry state, sendTiming wasn't 2732698Sktlim@umich.edu // called in zero time (e.g. the cache does this), burn a cycle 2742678Sktlim@umich.edu if (state == RETRY) { 2752678Sktlim@umich.edu // update the state to busy and reset the retrying port, we 2762678Sktlim@umich.edu // have done our bit and sent the retry 2772678Sktlim@umich.edu state = BUSY; 2782678Sktlim@umich.edu 2792678Sktlim@umich.edu // occupy the crossbar layer until the next cycle ends 2802678Sktlim@umich.edu occupyLayer(xbar.clockEdge(Cycles(1))); 2812678Sktlim@umich.edu } 2822678Sktlim@umich.edu} 2832678Sktlim@umich.edu 2842678Sktlim@umich.edutemplate <typename SrcType, typename DstType> 2852678Sktlim@umich.eduvoid 2862698Sktlim@umich.eduBaseXBar::Layer<SrcType,DstType>::recvRetry() 2872678Sktlim@umich.edu{ 2882678Sktlim@umich.edu // we should never get a retry without having failed to forward 2892698Sktlim@umich.edu // something to this port 2902678Sktlim@umich.edu assert(waitingForPeer != NULL); 2912678Sktlim@umich.edu 2922678Sktlim@umich.edu // add the port where the failed packet originated to the front of 2932678Sktlim@umich.edu // the waiting ports for the layer, this allows us to call retry 2942678Sktlim@umich.edu // on the port immediately if the crossbar layer is idle 2952678Sktlim@umich.edu waitingForLayer.push_front(waitingForPeer); 2962292SN/A 2972292SN/A // we are no longer waiting for the peer 2982292SN/A waitingForPeer = NULL; 2992292SN/A 3002292SN/A // if the layer is idle, retry this port straight away, if we 3012292SN/A // are busy, then simply let the port wait for its turn 3022292SN/A if (state == IDLE) { 3032292SN/A retryWaiting(); 3042292SN/A } else { 3052292SN/A assert(state == BUSY); 3062292SN/A } 3072292SN/A} 3082292SN/A 3092292SN/APortID 3102292SN/ABaseXBar::findPort(Addr addr) 3112292SN/A{ 3122669Sktlim@umich.edu // we should never see any address lookups before we've got the 3132669Sktlim@umich.edu // ranges of all connected slave modules 3142292SN/A assert(gotAllAddrRanges); 3152292SN/A 3162292SN/A // Check the cache 3172292SN/A PortID dest_id = checkPortCache(addr); 3182292SN/A if (dest_id != InvalidPortID) 3192292SN/A return dest_id; 3202292SN/A 3212292SN/A // Check the address map interval tree 3222292SN/A auto i = portMap.find(addr); 3232292SN/A if (i != portMap.end()) { 3242292SN/A dest_id = i->second; 3252329SN/A updatePortCache(dest_id, i->first); 3262292SN/A return dest_id; 3272292SN/A } 3282292SN/A 3292292SN/A // Check if this matches the default range 3302292SN/A if (useDefaultRange) { 3312292SN/A if (defaultRange.contains(addr)) { 3322292SN/A DPRINTF(AddrRanges, " found addr %#llx on default\n", 3332292SN/A addr); 3342292SN/A return defaultPortID; 3352292SN/A } 3362329SN/A } else if (defaultPortID != InvalidPortID) { 3372329SN/A DPRINTF(AddrRanges, "Unable to find destination for addr %#llx, " 3382329SN/A "will use default port\n", addr); 3392292SN/A return defaultPortID; 3402329SN/A } 3412329SN/A 3422329SN/A // we should use the range for the default port and it did not 3432292SN/A // match, or the default port is not set 3442292SN/A fatal("Unable to find destination for addr %#llx on %s\n", addr, 3452292SN/A name()); 3462292SN/A} 3472329SN/A 3482292SN/A/** Function called by the port when the crossbar is receiving a range change.*/ 3492292SN/Avoid 3502292SN/ABaseXBar::recvRangeChange(PortID master_port_id) 3512292SN/A{ 3522292SN/A DPRINTF(AddrRanges, "Received range change from slave port %s\n", 3532292SN/A masterPorts[master_port_id]->getSlavePort().name()); 3542292SN/A 3552292SN/A // remember that we got a range from this master port and thus the 3562292SN/A // connected slave module 3572292SN/A gotAddrRanges[master_port_id] = true; 3582292SN/A 3592329SN/A // update the global flag 3602329SN/A if (!gotAllAddrRanges) { 3612292SN/A // take a logical AND of all the ports and see if we got 3622292SN/A // ranges from everyone 3632292SN/A gotAllAddrRanges = true; 3642292SN/A std::vector<bool>::const_iterator r = gotAddrRanges.begin(); 3652292SN/A while (gotAllAddrRanges && r != gotAddrRanges.end()) { 3662292SN/A gotAllAddrRanges &= *r++; 3672292SN/A } 3682292SN/A if (gotAllAddrRanges) 3692292SN/A DPRINTF(AddrRanges, "Got address ranges from all slaves\n"); 3702292SN/A } 3712292SN/A 3722292SN/A // note that we could get the range from the default port at any 3732348SN/A // point in time, and we cannot assume that the default range is 3742307SN/A // set before the other ones are, so we do additional checks once 3752307SN/A // all ranges are provided 3762292SN/A if (master_port_id == defaultPortID) { 3772292SN/A // only update if we are indeed checking ranges for the 3782292SN/A // default port since the port might not have a valid range 3792292SN/A // otherwise 3802292SN/A if (useDefaultRange) { 3812292SN/A AddrRangeList ranges = masterPorts[master_port_id]->getAddrRanges(); 3822292SN/A 3832292SN/A if (ranges.size() != 1) 3842292SN/A fatal("Crossbar %s may only have a single default range", 3852292SN/A name()); 3862292SN/A 3872292SN/A defaultRange = ranges.front(); 3882292SN/A } 3892292SN/A } else { 3902698Sktlim@umich.edu // the ports are allowed to update their address ranges 3912698Sktlim@umich.edu // dynamically, so remove any existing entries 3922693Sktlim@umich.edu if (gotAddrRanges[master_port_id]) { 3932698Sktlim@umich.edu for (auto p = portMap.begin(); p != portMap.end(); ) { 3942678Sktlim@umich.edu if (p->second == master_port_id) 3952678Sktlim@umich.edu // erasing invalidates the iterator, so advance it 3962329SN/A // before the deletion takes place 3972292SN/A portMap.erase(p++); 3982292SN/A else 3992348SN/A p++; 4002292SN/A } 4012292SN/A } 4022348SN/A 4032292SN/A AddrRangeList ranges = masterPorts[master_port_id]->getAddrRanges(); 4042292SN/A 4052292SN/A for (const auto& r: ranges) { 4062292SN/A DPRINTF(AddrRanges, "Adding range %s for id %d\n", 4072292SN/A r.to_string(), master_port_id); 4082292SN/A if (portMap.insert(r, master_port_id) == portMap.end()) { 4092292SN/A PortID conflict_id = portMap.find(r)->second; 4102292SN/A fatal("%s has two ports responding within range %s:\n\t%s\n\t%s\n", 4112727Sktlim@umich.edu name(), 4122727Sktlim@umich.edu r.to_string(), 4132307SN/A masterPorts[master_port_id]->getSlavePort().name(), 4143126Sktlim@umich.edu masterPorts[conflict_id]->getSlavePort().name()); 4153126Sktlim@umich.edu } 4163126Sktlim@umich.edu } 4173126Sktlim@umich.edu } 4183126Sktlim@umich.edu 4193126Sktlim@umich.edu // if we have received ranges from all our neighbouring slave 4203126Sktlim@umich.edu // modules, go ahead and tell our connected master modules in 4213126Sktlim@umich.edu // turn, this effectively assumes a tree structure of the system 4223126Sktlim@umich.edu if (gotAllAddrRanges) { 4233126Sktlim@umich.edu DPRINTF(AddrRanges, "Aggregating address ranges\n"); 4243126Sktlim@umich.edu xbarRanges.clear(); 4253126Sktlim@umich.edu 4263126Sktlim@umich.edu // start out with the default range 4272727Sktlim@umich.edu if (useDefaultRange) { 4282727Sktlim@umich.edu if (!gotAddrRanges[defaultPortID]) 4292727Sktlim@umich.edu fatal("Crossbar %s uses default range, but none provided", 4302727Sktlim@umich.edu name()); 4312727Sktlim@umich.edu 4322727Sktlim@umich.edu xbarRanges.push_back(defaultRange); 4332727Sktlim@umich.edu DPRINTF(AddrRanges, "-- Adding default %s\n", 4342727Sktlim@umich.edu defaultRange.to_string()); 4352727Sktlim@umich.edu } 4362727Sktlim@umich.edu 4372727Sktlim@umich.edu // merge all interleaved ranges and add any range that is not 4382727Sktlim@umich.edu // a subset of the default range 4392727Sktlim@umich.edu std::vector<AddrRange> intlv_ranges; 4402727Sktlim@umich.edu for (const auto& r: portMap) { 4412727Sktlim@umich.edu // if the range is interleaved then save it for now 4422292SN/A if (r.first.interleaved()) { 4432292SN/A // if we already got interleaved ranges that are not 4442292SN/A // part of the same range, then first do a merge 4452669Sktlim@umich.edu // before we add the new one 4462292SN/A if (!intlv_ranges.empty() && 4472292SN/A !intlv_ranges.back().mergesWith(r.first)) { 4482292SN/A DPRINTF(AddrRanges, "-- Merging range from %d ranges\n", 4492669Sktlim@umich.edu intlv_ranges.size()); 4502292SN/A AddrRange merged_range(intlv_ranges); 4512292SN/A // next decide if we keep the merged range or not 4522292SN/A if (!(useDefaultRange && 4532292SN/A merged_range.isSubset(defaultRange))) { 4542292SN/A xbarRanges.push_back(merged_range); 4552292SN/A DPRINTF(AddrRanges, "-- Adding merged range %s\n", 4562292SN/A merged_range.to_string()); 4572292SN/A } 4582292SN/A intlv_ranges.clear(); 4592292SN/A } 4602292SN/A intlv_ranges.push_back(r.first); 4612292SN/A } else { 4622292SN/A // keep the current range if not a subset of the default 4632292SN/A if (!(useDefaultRange && 4642292SN/A r.first.isSubset(defaultRange))) { 4652292SN/A xbarRanges.push_back(r.first); 4662292SN/A DPRINTF(AddrRanges, "-- Adding range %s\n", 4672292SN/A r.first.to_string()); 4682292SN/A } 4692292SN/A } 4702292SN/A } 4712292SN/A 4722292SN/A // if there is still interleaved ranges waiting to be merged, 4732292SN/A // go ahead and do it 4742292SN/A if (!intlv_ranges.empty()) { 4752292SN/A DPRINTF(AddrRanges, "-- Merging range from %d ranges\n", 4762292SN/A intlv_ranges.size()); 4772292SN/A AddrRange merged_range(intlv_ranges); 4782292SN/A if (!(useDefaultRange && merged_range.isSubset(defaultRange))) { 4792292SN/A xbarRanges.push_back(merged_range); 4802292SN/A DPRINTF(AddrRanges, "-- Adding merged range %s\n", 4812292SN/A merged_range.to_string()); 4822292SN/A } 4832292SN/A } 4842669Sktlim@umich.edu 4852292SN/A // also check that no range partially overlaps with the 4862669Sktlim@umich.edu // default range, this has to be done after all ranges are set 4872292SN/A // as there are no guarantees for when the default range is 4882669Sktlim@umich.edu // update with respect to the other ones 4892669Sktlim@umich.edu if (useDefaultRange) { 4902669Sktlim@umich.edu for (const auto& r: xbarRanges) { 4912292SN/A // see if the new range is partially 4922292SN/A // overlapping the default range 4932292SN/A if (r.intersects(defaultRange) && 4942292SN/A !r.isSubset(defaultRange)) 4952292SN/A fatal("Range %s intersects the " \ 4963172Sstever@eecs.umich.edu "default range of %s but is not a " \ 4972731Sktlim@umich.edu "subset\n", r.to_string(), name()); 4982669Sktlim@umich.edu } 4992727Sktlim@umich.edu } 5004032Sktlim@umich.edu 5014032Sktlim@umich.edu // tell all our neighbouring master ports that our address 5024032Sktlim@umich.edu // ranges have changed 5034032Sktlim@umich.edu for (const auto& s: slavePorts) 5044032Sktlim@umich.edu s->sendRangeChange(); 5052292SN/A } 5062292SN/A 5072292SN/A clearPortCache(); 5082292SN/A} 5092669Sktlim@umich.edu 5102292SN/AAddrRangeList 5112292SN/ABaseXBar::getAddrRanges() const 5122292SN/A{ 5132292SN/A // we should never be asked without first having sent a range 5142292SN/A // change, and the latter is only done once we have all the ranges 5152669Sktlim@umich.edu // of the connected devices 5162292SN/A assert(gotAllAddrRanges); 5173172Sstever@eecs.umich.edu 5183326Sktlim@umich.edu // at the moment, this never happens, as there are no cycles in 5193326Sktlim@umich.edu // the range queries and no devices on the master side of a crossbar 5203326Sktlim@umich.edu // (CPU, cache, bridge etc) actually care about the ranges of the 5213326Sktlim@umich.edu // ports they are connected to 5223326Sktlim@umich.edu 5233326Sktlim@umich.edu DPRINTF(AddrRanges, "Received address range request\n"); 5242292SN/A 5252292SN/A return xbarRanges; 5262292SN/A} 5272292SN/A 5282292SN/Avoid 5292292SN/ABaseXBar::regStats() 5302292SN/A{ 5312292SN/A using namespace Stats; 5322292SN/A 5332292SN/A transDist 5342292SN/A .init(MemCmd::NUM_MEM_CMDS) 5352292SN/A .name(name() + ".trans_dist") 5362292SN/A .desc("Transaction distribution") 5372292SN/A .flags(nozero); 5382292SN/A 5392292SN/A // get the string representation of the commands 5402292SN/A for (int i = 0; i < MemCmd::NUM_MEM_CMDS; i++) { 5412292SN/A MemCmd cmd(i); 5424032Sktlim@umich.edu const std::string &cstr = cmd.toString(); 5434032Sktlim@umich.edu transDist.subname(i, cstr); 5444032Sktlim@umich.edu } 5454032Sktlim@umich.edu 5462292SN/A pktCount 5472292SN/A .init(slavePorts.size(), masterPorts.size()) 5482292SN/A .name(name() + ".pkt_count") 5492292SN/A .desc("Packet count per connected master and slave (bytes)") 5502669Sktlim@umich.edu .flags(total | nozero | nonan); 5512292SN/A 5522669Sktlim@umich.edu pktSize 5532669Sktlim@umich.edu .init(slavePorts.size(), masterPorts.size()) 5542292SN/A .name(name() + ".pkt_size") 5552669Sktlim@umich.edu .desc("Cumulative packet size per connected master and slave (bytes)") 5562292SN/A .flags(total | nozero | nonan); 5572292SN/A 5582669Sktlim@umich.edu // both the packet count and total size are two-dimensional 5592669Sktlim@umich.edu // vectors, indexed by slave port id and master port id, thus the 5602292SN/A // neighbouring master and slave, they do not differentiate what 5612292SN/A // came from the master and was forwarded to the slave (requests 5624032Sktlim@umich.edu // and snoop responses) and what came from the slave and was 5632329SN/A // forwarded to the master (responses and snoop requests) 5642669Sktlim@umich.edu for (int i = 0; i < slavePorts.size(); i++) { 5652329SN/A pktCount.subname(i, slavePorts[i]->getMasterPort().name()); 5662292SN/A pktSize.subname(i, slavePorts[i]->getMasterPort().name()); 5672292SN/A for (int j = 0; j < masterPorts.size(); j++) { 5682292SN/A pktCount.ysubname(j, masterPorts[j]->getSlavePort().name()); 5692292SN/A pktSize.ysubname(j, masterPorts[j]->getSlavePort().name()); 5702292SN/A } 5713803Sgblack@eecs.umich.edu } 5723803Sgblack@eecs.umich.edu} 5733803Sgblack@eecs.umich.edu 5743803Sgblack@eecs.umich.edutemplate <typename SrcType, typename DstType> 5753803Sgblack@eecs.umich.eduunsigned int 5763803Sgblack@eecs.umich.eduBaseXBar::Layer<SrcType,DstType>::drain(DrainManager *dm) 5772669Sktlim@umich.edu{ 5782669Sktlim@umich.edu //We should check that we're not "doing" anything, and that noone is 5792292SN/A //waiting. We might be idle but have someone waiting if the device we 5802669Sktlim@umich.edu //contacted for a retry didn't actually retry. 5812292SN/A if (state != IDLE) { 5822292SN/A DPRINTF(Drain, "Crossbar not drained\n"); 5832292SN/A drainManager = dm; 5842693Sktlim@umich.edu return 1; 5852678Sktlim@umich.edu } 5862678Sktlim@umich.edu return 0; 5872678Sktlim@umich.edu} 5882678Sktlim@umich.edu 5892678Sktlim@umich.edutemplate <typename SrcType, typename DstType> 5902292SN/Avoid 5912292SN/ABaseXBar::Layer<SrcType,DstType>::regStats() 5922292SN/A{ 5932292SN/A using namespace Stats; 5942292SN/A 5952678Sktlim@umich.edu occupancy 5962727Sktlim@umich.edu .name(name() + ".occupancy") 5972292SN/A .desc("Layer occupancy (ticks)") 5982292SN/A .flags(nozero); 5992292SN/A 6002292SN/A utilization 6012292SN/A .name(name() + ".utilization") 6022292SN/A .desc("Layer utilization (%)") 6032292SN/A .precision(1) 6042292SN/A .flags(nozero); 6052292SN/A 6062292SN/A utilization = 100 * occupancy / simTicks; 6074032Sktlim@umich.edu} 6082292SN/A 6092292SN/A/** 6102292SN/A * Crossbar layer template instantiations. Could be removed with _impl.hh 6112292SN/A * file, but since there are only two given options (MasterPort and 6122292SN/A * SlavePort) it seems a bit excessive at this point. 6132292SN/A */ 6142292SN/Atemplate class BaseXBar::Layer<SlavePort,MasterPort>; 6152669Sktlim@umich.edutemplate class BaseXBar::Layer<MasterPort,SlavePort>; 6162292SN/A