xbar.cc revision 10414
12497SN/A/* 210405Sandreas.hansson@arm.com * Copyright (c) 2011-2014 ARM Limited 38711SN/A * All rights reserved 48711SN/A * 58711SN/A * The license below extends only to copyright in the software and shall 68711SN/A * not be construed as granting a license to any other intellectual 78711SN/A * property including but not limited to intellectual property relating 88711SN/A * to a hardware implementation of the functionality of the software 98711SN/A * licensed hereunder. You may use the software subject to the license 108711SN/A * terms below provided that you ensure that this notice is replicated 118711SN/A * unmodified and in its entirety in all distributions of the software, 128711SN/A * modified or unmodified, in source code or in binary form. 138711SN/A * 142497SN/A * Copyright (c) 2006 The Regents of The University of Michigan 152497SN/A * All rights reserved. 162497SN/A * 172497SN/A * Redistribution and use in source and binary forms, with or without 182497SN/A * modification, are permitted provided that the following conditions are 192497SN/A * met: redistributions of source code must retain the above copyright 202497SN/A * notice, this list of conditions and the following disclaimer; 212497SN/A * redistributions in binary form must reproduce the above copyright 222497SN/A * notice, this list of conditions and the following disclaimer in the 232497SN/A * documentation and/or other materials provided with the distribution; 242497SN/A * neither the name of the copyright holders nor the names of its 252497SN/A * contributors may be used to endorse or promote products derived from 262497SN/A * this software without specific prior written permission. 272497SN/A * 282497SN/A * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 292497SN/A * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 302497SN/A * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 312497SN/A * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 322497SN/A * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 332497SN/A * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 342497SN/A * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 352497SN/A * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 362497SN/A * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 372497SN/A * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 382497SN/A * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 392665SN/A * 402665SN/A * Authors: Ali Saidi 418715SN/A * Andreas Hansson 428922SN/A * William Wang 432497SN/A */ 442497SN/A 452497SN/A/** 462982SN/A * @file 4710405Sandreas.hansson@arm.com * Definition of a crossbar object. 482497SN/A */ 492497SN/A 502846SN/A#include "base/misc.hh" 512548SN/A#include "base/trace.hh" 5210405Sandreas.hansson@arm.com#include "debug/AddrRanges.hh" 539152SN/A#include "debug/Drain.hh" 5410405Sandreas.hansson@arm.com#include "debug/XBar.hh" 5510405Sandreas.hansson@arm.com#include "mem/xbar.hh" 562497SN/A 5710405Sandreas.hansson@arm.comBaseXBar::BaseXBar(const BaseXBarParams *p) 589157SN/A : MemObject(p), 599091SN/A headerCycles(p->header_cycles), width(p->width), 609279SN/A gotAddrRanges(p->port_default_connection_count + 619279SN/A p->port_master_connection_count, false), 629279SN/A gotAllAddrRanges(false), defaultPortID(InvalidPortID), 639814SN/A useDefaultRange(p->use_default_range) 649240SN/A{} 658851SN/A 6610405Sandreas.hansson@arm.comBaseXBar::~BaseXBar() 679036SN/A{ 6810405Sandreas.hansson@arm.com for (auto m: masterPorts) 6910405Sandreas.hansson@arm.com delete m; 708851SN/A 7110405Sandreas.hansson@arm.com for (auto s: slavePorts) 7210405Sandreas.hansson@arm.com delete s; 737523SN/A} 747523SN/A 759278SN/Avoid 7610405Sandreas.hansson@arm.comBaseXBar::init() 779278SN/A{ 789278SN/A} 799278SN/A 809294SN/ABaseMasterPort & 8110405Sandreas.hansson@arm.comBaseXBar::getMasterPort(const std::string &if_name, PortID idx) 822640SN/A{ 838948SN/A if (if_name == "master" && idx < masterPorts.size()) { 848948SN/A // the master port index translates directly to the vector position 858922SN/A return *masterPorts[idx]; 868851SN/A } else if (if_name == "default") { 879031SN/A return *masterPorts[defaultPortID]; 888715SN/A } else { 898922SN/A return MemObject::getMasterPort(if_name, idx); 908922SN/A } 918922SN/A} 928922SN/A 939294SN/ABaseSlavePort & 9410405Sandreas.hansson@arm.comBaseXBar::getSlavePort(const std::string &if_name, PortID idx) 958922SN/A{ 968948SN/A if (if_name == "slave" && idx < slavePorts.size()) { 978948SN/A // the slave port index translates directly to the vector position 988948SN/A return *slavePorts[idx]; 998922SN/A } else { 1008922SN/A return MemObject::getSlavePort(if_name, idx); 1013489SN/A } 1022640SN/A} 1032640SN/A 1049547SN/Avoid 10510405Sandreas.hansson@arm.comBaseXBar::calcPacketTiming(PacketPtr pkt) 1062497SN/A{ 10710405Sandreas.hansson@arm.com // the crossbar will be called at a time that is not necessarily 1089547SN/A // coinciding with its own clock, so start by determining how long 1099547SN/A // until the next clock edge (could be zero) 1109648SN/A Tick offset = clockEdge() - curTick(); 1115354SN/A 1129547SN/A // determine how many cycles are needed to send the data 1139547SN/A unsigned dataCycles = pkt->hasData() ? divCeil(pkt->getSize(), width) : 0; 1143210SN/A 1159549SN/A // before setting the bus delay fields of the packet, ensure that 11610405Sandreas.hansson@arm.com // the delay from any previous crossbar has been accounted for 11710405Sandreas.hansson@arm.com if (pkt->firstWordDelay != 0 || pkt->lastWordDelay != 0) 11810405Sandreas.hansson@arm.com panic("Packet %s already has delay (%d, %d) that should be " 11910405Sandreas.hansson@arm.com "accounted for.\n", pkt->cmdString(), pkt->firstWordDelay, 12010405Sandreas.hansson@arm.com pkt->lastWordDelay); 1219549SN/A 1229545SN/A // The first word will be delivered on the cycle after the header. 12310405Sandreas.hansson@arm.com pkt->firstWordDelay = (headerCycles + 1) * clockPeriod() + offset; 1243218SN/A 12510405Sandreas.hansson@arm.com // Note that currently lastWordDelay can be smaller than 12610405Sandreas.hansson@arm.com // firstWordDelay if the packet has no data 12710405Sandreas.hansson@arm.com pkt->lastWordDelay = (headerCycles + dataCycles) * clockPeriod() + 1289547SN/A offset; 1295354SN/A} 1305354SN/A 1319715SN/Atemplate <typename SrcType, typename DstType> 13210405Sandreas.hansson@arm.comBaseXBar::Layer<SrcType,DstType>::Layer(DstType& _port, BaseXBar& _xbar, 1339715SN/A const std::string& _name) : 13410405Sandreas.hansson@arm.com port(_port), xbar(_xbar), _name(_name), state(IDLE), drainManager(NULL), 13510347SN/A waitingForPeer(NULL), releaseEvent(this) 1369092SN/A{ 1379092SN/A} 1389092SN/A 1399715SN/Atemplate <typename SrcType, typename DstType> 14010405Sandreas.hansson@arm.comvoid BaseXBar::Layer<SrcType,DstType>::occupyLayer(Tick until) 1415354SN/A{ 14210405Sandreas.hansson@arm.com // ensure the state is busy at this point, as the layer should 1439612SN/A // transition from idle as soon as it has decided to forward the 1449612SN/A // packet to prevent any follow-on calls to sendTiming seeing an 14510405Sandreas.hansson@arm.com // unoccupied layer 1469612SN/A assert(state == BUSY); 1475354SN/A 14810405Sandreas.hansson@arm.com // until should never be 0 as express snoops never occupy the layer 1499091SN/A assert(until != 0); 15010405Sandreas.hansson@arm.com xbar.schedule(releaseEvent, until); 1519091SN/A 1529712SN/A // account for the occupied ticks 1539712SN/A occupancy += until - curTick(); 1549712SN/A 15510405Sandreas.hansson@arm.com DPRINTF(BaseXBar, "The crossbar layer is now busy from tick %d to %d\n", 1569091SN/A curTick(), until); 1573244SN/A} 1583244SN/A 1599715SN/Atemplate <typename SrcType, typename DstType> 1608948SN/Abool 16110405Sandreas.hansson@arm.comBaseXBar::Layer<SrcType,DstType>::tryTiming(SrcType* src_port) 1628948SN/A{ 1639716SN/A // if we are in the retry state, we will not see anything but the 1649716SN/A // retrying port (or in the case of the snoop ports the snoop 1659716SN/A // response port that mirrors the actual slave port) as we leave 1669716SN/A // this state again in zero time if the peer does not immediately 16710405Sandreas.hansson@arm.com // call the layer when receiving the retry 1689716SN/A 1699716SN/A // first we see if the layer is busy, next we check if the 1709716SN/A // destination port is already engaged in a transaction waiting 1719716SN/A // for a retry from the peer 1729716SN/A if (state == BUSY || waitingForPeer != NULL) { 1739716SN/A // the port should not be waiting already 1749716SN/A assert(std::find(waitingForLayer.begin(), waitingForLayer.end(), 1759716SN/A src_port) == waitingForLayer.end()); 1769716SN/A 1779612SN/A // put the port at the end of the retry list waiting for the 1789612SN/A // layer to be freed up (and in the case of a busy peer, for 17910405Sandreas.hansson@arm.com // that transaction to go through, and then the layer to free 1809612SN/A // up) 1819715SN/A waitingForLayer.push_back(src_port); 1829091SN/A return false; 1838948SN/A } 1849091SN/A 1859612SN/A state = BUSY; 1869611SN/A 1879091SN/A return true; 1888948SN/A} 1898948SN/A 1909715SN/Atemplate <typename SrcType, typename DstType> 1918975SN/Avoid 19210405Sandreas.hansson@arm.comBaseXBar::Layer<SrcType,DstType>::succeededTiming(Tick busy_time) 1938948SN/A{ 1949612SN/A // we should have gone from idle or retry to busy in the tryTiming 1959612SN/A // test 1969091SN/A assert(state == BUSY); 1979091SN/A 19810405Sandreas.hansson@arm.com // occupy the layer accordingly 1999092SN/A occupyLayer(busy_time); 2009091SN/A} 2019091SN/A 2029715SN/Atemplate <typename SrcType, typename DstType> 2039091SN/Avoid 20410405Sandreas.hansson@arm.comBaseXBar::Layer<SrcType,DstType>::failedTiming(SrcType* src_port, 2059715SN/A Tick busy_time) 2069091SN/A{ 2079612SN/A // ensure no one got in between and tried to send something to 2089612SN/A // this port 2099715SN/A assert(waitingForPeer == NULL); 2109091SN/A 2119612SN/A // if the source port is the current retrying one or not, we have 2129612SN/A // failed in forwarding and should track that we are now waiting 2139612SN/A // for the peer to send a retry 2149715SN/A waitingForPeer = src_port; 2159612SN/A 2169612SN/A // we should have gone from idle or retry to busy in the tryTiming 2179612SN/A // test 2189612SN/A assert(state == BUSY); 2199091SN/A 2209091SN/A // occupy the bus accordingly 2219092SN/A occupyLayer(busy_time); 2228948SN/A} 2238948SN/A 2249715SN/Atemplate <typename SrcType, typename DstType> 2258948SN/Avoid 22610405Sandreas.hansson@arm.comBaseXBar::Layer<SrcType,DstType>::releaseLayer() 2272657SN/A{ 2288915SN/A // releasing the bus means we should now be idle 2299091SN/A assert(state == BUSY); 2309092SN/A assert(!releaseEvent.scheduled()); 2319091SN/A 2329091SN/A // update the state 2339091SN/A state = IDLE; 2343252SN/A 2359612SN/A // bus layer is now idle, so if someone is waiting we can retry 2369612SN/A if (!waitingForLayer.empty()) { 23710347SN/A // there is no point in sending a retry if someone is still 23810347SN/A // waiting for the peer 23910347SN/A if (waitingForPeer == NULL) 24010347SN/A retryWaiting(); 2419710SN/A } else if (waitingForPeer == NULL && drainManager) { 24210405Sandreas.hansson@arm.com DPRINTF(Drain, "Crossbar done draining, signaling drain manager\n"); 2439091SN/A //If we weren't able to drain before, do it now. 2449342SN/A drainManager->signalDrainDone(); 2453512SN/A // Clear the drain event once we're done with it. 2469342SN/A drainManager = NULL; 2473512SN/A } 2482657SN/A} 2492657SN/A 2509715SN/Atemplate <typename SrcType, typename DstType> 2518915SN/Avoid 25210405Sandreas.hansson@arm.comBaseXBar::Layer<SrcType,DstType>::retryWaiting() 2538915SN/A{ 2549612SN/A // this should never be called with no one waiting 2559612SN/A assert(!waitingForLayer.empty()); 2568915SN/A 2579091SN/A // we always go to retrying from idle 2589091SN/A assert(state == IDLE); 2599091SN/A 2609611SN/A // update the state 2619091SN/A state = RETRY; 2628915SN/A 2639611SN/A // set the retrying port to the front of the retry list and pop it 2649611SN/A // off the list 26510347SN/A SrcType* retryingPort = waitingForLayer.front(); 2669612SN/A waitingForLayer.pop_front(); 2679611SN/A 2689612SN/A // tell the port to retry, which in some cases ends up calling the 26910405Sandreas.hansson@arm.com // layer again 2709611SN/A retryingPort->sendRetry(); 2718915SN/A 27210405Sandreas.hansson@arm.com // If the layer is still in the retry state, sendTiming wasn't 2739612SN/A // called in zero time (e.g. the cache does this), burn a cycle 2749091SN/A if (state == RETRY) { 2759612SN/A // update the state to busy and reset the retrying port, we 2769612SN/A // have done our bit and sent the retry 2779091SN/A state = BUSY; 2789091SN/A 27910405Sandreas.hansson@arm.com // occupy the crossbar layer until the next cycle ends 28010405Sandreas.hansson@arm.com occupyLayer(xbar.clockEdge(Cycles(1))); 2818915SN/A } 2828915SN/A} 2838915SN/A 2849715SN/Atemplate <typename SrcType, typename DstType> 2858915SN/Avoid 28610405Sandreas.hansson@arm.comBaseXBar::Layer<SrcType,DstType>::recvRetry() 2878915SN/A{ 2889612SN/A // we should never get a retry without having failed to forward 2899612SN/A // something to this port 2909715SN/A assert(waitingForPeer != NULL); 2918915SN/A 2929715SN/A // add the port where the failed packet originated to the front of 2939715SN/A // the waiting ports for the layer, this allows us to call retry 29410405Sandreas.hansson@arm.com // on the port immediately if the crossbar layer is idle 2959715SN/A waitingForLayer.push_front(waitingForPeer); 2969612SN/A 2979715SN/A // we are no longer waiting for the peer 2989715SN/A waitingForPeer = NULL; 2999612SN/A 30010405Sandreas.hansson@arm.com // if the layer is idle, retry this port straight away, if we 3019612SN/A // are busy, then simply let the port wait for its turn 3029091SN/A if (state == IDLE) { 3038915SN/A retryWaiting(); 3049612SN/A } else { 3059612SN/A assert(state == BUSY); 3068915SN/A } 3078915SN/A} 3088915SN/A 3099031SN/APortID 31010405Sandreas.hansson@arm.comBaseXBar::findPort(Addr addr) 3112497SN/A{ 3129279SN/A // we should never see any address lookups before we've got the 3139279SN/A // ranges of all connected slave modules 3149279SN/A assert(gotAllAddrRanges); 3159279SN/A 3169279SN/A // Check the cache 3179031SN/A PortID dest_id = checkPortCache(addr); 3189031SN/A if (dest_id != InvalidPortID) 3197523SN/A return dest_id; 3207523SN/A 3219279SN/A // Check the address map interval tree 32210405Sandreas.hansson@arm.com auto i = portMap.find(addr); 3237523SN/A if (i != portMap.end()) { 3247523SN/A dest_id = i->second; 3259279SN/A updatePortCache(dest_id, i->first); 3267523SN/A return dest_id; 3274958SN/A } 3282846SN/A 3292846SN/A // Check if this matches the default range 3307523SN/A if (useDefaultRange) { 3319405SN/A if (defaultRange.contains(addr)) { 33210405Sandreas.hansson@arm.com DPRINTF(AddrRanges, " found addr %#llx on default\n", 3339279SN/A addr); 3349279SN/A return defaultPortID; 3352846SN/A } 3369031SN/A } else if (defaultPortID != InvalidPortID) { 33710405Sandreas.hansson@arm.com DPRINTF(AddrRanges, "Unable to find destination for addr %#llx, " 3388849SN/A "will use default port\n", addr); 3399031SN/A return defaultPortID; 3402846SN/A } 3412846SN/A 3428849SN/A // we should use the range for the default port and it did not 3438849SN/A // match, or the default port is not set 34410405Sandreas.hansson@arm.com fatal("Unable to find destination for addr %#llx on %s\n", addr, 3458849SN/A name()); 3463074SN/A} 3473074SN/A 34810405Sandreas.hansson@arm.com/** Function called by the port when the crossbar is receiving a range change.*/ 3492497SN/Avoid 35010405Sandreas.hansson@arm.comBaseXBar::recvRangeChange(PortID master_port_id) 3512497SN/A{ 35210405Sandreas.hansson@arm.com DPRINTF(AddrRanges, "Received range change from slave port %s\n", 3539407SN/A masterPorts[master_port_id]->getSlavePort().name()); 3549407SN/A 3559279SN/A // remember that we got a range from this master port and thus the 3569279SN/A // connected slave module 3579279SN/A gotAddrRanges[master_port_id] = true; 3582846SN/A 3599279SN/A // update the global flag 3609279SN/A if (!gotAllAddrRanges) { 3619279SN/A // take a logical AND of all the ports and see if we got 3629279SN/A // ranges from everyone 3639279SN/A gotAllAddrRanges = true; 3649279SN/A std::vector<bool>::const_iterator r = gotAddrRanges.begin(); 3659279SN/A while (gotAllAddrRanges && r != gotAddrRanges.end()) { 3669279SN/A gotAllAddrRanges &= *r++; 3679279SN/A } 3689407SN/A if (gotAllAddrRanges) 36910405Sandreas.hansson@arm.com DPRINTF(AddrRanges, "Got address ranges from all slaves\n"); 3709279SN/A } 3712534SN/A 3729279SN/A // note that we could get the range from the default port at any 3739279SN/A // point in time, and we cannot assume that the default range is 3749279SN/A // set before the other ones are, so we do additional checks once 3759279SN/A // all ranges are provided 3769032SN/A if (master_port_id == defaultPortID) { 3779279SN/A // only update if we are indeed checking ranges for the 3789279SN/A // default port since the port might not have a valid range 3799279SN/A // otherwise 3807523SN/A if (useDefaultRange) { 3819279SN/A AddrRangeList ranges = masterPorts[master_port_id]->getAddrRanges(); 3829279SN/A 3839279SN/A if (ranges.size() != 1) 38410405Sandreas.hansson@arm.com fatal("Crossbar %s may only have a single default range", 3859279SN/A name()); 3869279SN/A 3879279SN/A defaultRange = ranges.front(); 3889279SN/A } 3899279SN/A } else { 3909279SN/A // the ports are allowed to update their address ranges 3919279SN/A // dynamically, so remove any existing entries 3929279SN/A if (gotAddrRanges[master_port_id]) { 39310405Sandreas.hansson@arm.com for (auto p = portMap.begin(); p != portMap.end(); ) { 3949279SN/A if (p->second == master_port_id) 3959279SN/A // erasing invalidates the iterator, so advance it 3969279SN/A // before the deletion takes place 3979279SN/A portMap.erase(p++); 3989279SN/A else 3999279SN/A p++; 4003489SN/A } 4012846SN/A } 4022565SN/A 4039279SN/A AddrRangeList ranges = masterPorts[master_port_id]->getAddrRanges(); 4042497SN/A 40510405Sandreas.hansson@arm.com for (const auto& r: ranges) { 40610405Sandreas.hansson@arm.com DPRINTF(AddrRanges, "Adding range %s for id %d\n", 40710405Sandreas.hansson@arm.com r.to_string(), master_port_id); 40810405Sandreas.hansson@arm.com if (portMap.insert(r, master_port_id) == portMap.end()) { 40910405Sandreas.hansson@arm.com PortID conflict_id = portMap.find(r)->second; 41010414SCurtis.Dunham@arm.com fatal("%s has two ports responding within range %s:\n\t%s\n\t%s\n", 4119032SN/A name(), 41210414SCurtis.Dunham@arm.com r.to_string(), 4139032SN/A masterPorts[master_port_id]->getSlavePort().name(), 4148922SN/A masterPorts[conflict_id]->getSlavePort().name()); 4155490SN/A } 4162846SN/A } 4172565SN/A } 4182568SN/A 4199279SN/A // if we have received ranges from all our neighbouring slave 4209279SN/A // modules, go ahead and tell our connected master modules in 4219279SN/A // turn, this effectively assumes a tree structure of the system 4229279SN/A if (gotAllAddrRanges) { 42310405Sandreas.hansson@arm.com DPRINTF(AddrRanges, "Aggregating address ranges\n"); 42410405Sandreas.hansson@arm.com xbarRanges.clear(); 4259564SN/A 4269564SN/A // start out with the default range 4279564SN/A if (useDefaultRange) { 4289564SN/A if (!gotAddrRanges[defaultPortID]) 42910405Sandreas.hansson@arm.com fatal("Crossbar %s uses default range, but none provided", 4309564SN/A name()); 4319564SN/A 43210405Sandreas.hansson@arm.com xbarRanges.push_back(defaultRange); 43310405Sandreas.hansson@arm.com DPRINTF(AddrRanges, "-- Adding default %s\n", 4349564SN/A defaultRange.to_string()); 4359564SN/A } 4369564SN/A 4379564SN/A // merge all interleaved ranges and add any range that is not 4389564SN/A // a subset of the default range 4399564SN/A std::vector<AddrRange> intlv_ranges; 44010405Sandreas.hansson@arm.com for (const auto& r: portMap) { 4419564SN/A // if the range is interleaved then save it for now 44210405Sandreas.hansson@arm.com if (r.first.interleaved()) { 4439564SN/A // if we already got interleaved ranges that are not 4449564SN/A // part of the same range, then first do a merge 4459564SN/A // before we add the new one 4469564SN/A if (!intlv_ranges.empty() && 44710405Sandreas.hansson@arm.com !intlv_ranges.back().mergesWith(r.first)) { 44810405Sandreas.hansson@arm.com DPRINTF(AddrRanges, "-- Merging range from %d ranges\n", 4499564SN/A intlv_ranges.size()); 4509564SN/A AddrRange merged_range(intlv_ranges); 4519564SN/A // next decide if we keep the merged range or not 4529564SN/A if (!(useDefaultRange && 4539564SN/A merged_range.isSubset(defaultRange))) { 45410405Sandreas.hansson@arm.com xbarRanges.push_back(merged_range); 45510405Sandreas.hansson@arm.com DPRINTF(AddrRanges, "-- Adding merged range %s\n", 4569564SN/A merged_range.to_string()); 4579564SN/A } 4589564SN/A intlv_ranges.clear(); 4599564SN/A } 46010405Sandreas.hansson@arm.com intlv_ranges.push_back(r.first); 4619564SN/A } else { 4629564SN/A // keep the current range if not a subset of the default 4639564SN/A if (!(useDefaultRange && 46410405Sandreas.hansson@arm.com r.first.isSubset(defaultRange))) { 46510405Sandreas.hansson@arm.com xbarRanges.push_back(r.first); 46610405Sandreas.hansson@arm.com DPRINTF(AddrRanges, "-- Adding range %s\n", 46710405Sandreas.hansson@arm.com r.first.to_string()); 4689564SN/A } 4699564SN/A } 4709564SN/A } 4719564SN/A 4729564SN/A // if there is still interleaved ranges waiting to be merged, 4739564SN/A // go ahead and do it 4749564SN/A if (!intlv_ranges.empty()) { 47510405Sandreas.hansson@arm.com DPRINTF(AddrRanges, "-- Merging range from %d ranges\n", 4769564SN/A intlv_ranges.size()); 4779564SN/A AddrRange merged_range(intlv_ranges); 4789564SN/A if (!(useDefaultRange && merged_range.isSubset(defaultRange))) { 47910405Sandreas.hansson@arm.com xbarRanges.push_back(merged_range); 48010405Sandreas.hansson@arm.com DPRINTF(AddrRanges, "-- Adding merged range %s\n", 4819564SN/A merged_range.to_string()); 4829564SN/A } 4839564SN/A } 4849564SN/A 4859279SN/A // also check that no range partially overlaps with the 4869279SN/A // default range, this has to be done after all ranges are set 4879279SN/A // as there are no guarantees for when the default range is 4889279SN/A // update with respect to the other ones 4899279SN/A if (useDefaultRange) { 49010405Sandreas.hansson@arm.com for (const auto& r: xbarRanges) { 4919564SN/A // see if the new range is partially 4929564SN/A // overlapping the default range 49310405Sandreas.hansson@arm.com if (r.intersects(defaultRange) && 49410405Sandreas.hansson@arm.com !r.isSubset(defaultRange)) 4959564SN/A fatal("Range %s intersects the " \ 4969564SN/A "default range of %s but is not a " \ 49710405Sandreas.hansson@arm.com "subset\n", r.to_string(), name()); 4989279SN/A } 4999279SN/A } 5009279SN/A 5019279SN/A // tell all our neighbouring master ports that our address 5029279SN/A // ranges have changed 50310405Sandreas.hansson@arm.com for (const auto& s: slavePorts) 50410405Sandreas.hansson@arm.com s->sendRangeChange(); 5059279SN/A } 5069279SN/A 5079279SN/A clearPortCache(); 5082497SN/A} 5092497SN/A 5108711SN/AAddrRangeList 51110405Sandreas.hansson@arm.comBaseXBar::getAddrRanges() const 5122497SN/A{ 5139279SN/A // we should never be asked without first having sent a range 5149279SN/A // change, and the latter is only done once we have all the ranges 5159279SN/A // of the connected devices 5169279SN/A assert(gotAllAddrRanges); 5172568SN/A 5189407SN/A // at the moment, this never happens, as there are no cycles in 51910405Sandreas.hansson@arm.com // the range queries and no devices on the master side of a crossbar 5209407SN/A // (CPU, cache, bridge etc) actually care about the ranges of the 5219407SN/A // ports they are connected to 5229407SN/A 52310405Sandreas.hansson@arm.com DPRINTF(AddrRanges, "Received address range request\n"); 5242846SN/A 52510405Sandreas.hansson@arm.com return xbarRanges; 5268711SN/A} 5278711SN/A 5289712SN/Avoid 52910405Sandreas.hansson@arm.comBaseXBar::regStats() 5309712SN/A{ 5319712SN/A using namespace Stats; 5329712SN/A 5339712SN/A transDist 5349712SN/A .init(MemCmd::NUM_MEM_CMDS) 5359712SN/A .name(name() + ".trans_dist") 5369712SN/A .desc("Transaction distribution") 5379712SN/A .flags(nozero); 5389712SN/A 5399712SN/A // get the string representation of the commands 5409712SN/A for (int i = 0; i < MemCmd::NUM_MEM_CMDS; i++) { 5419712SN/A MemCmd cmd(i); 5429712SN/A const std::string &cstr = cmd.toString(); 5439712SN/A transDist.subname(i, cstr); 5449712SN/A } 5459712SN/A 5469712SN/A pktCount 5479712SN/A .init(slavePorts.size(), masterPorts.size()) 5489712SN/A .name(name() + ".pkt_count") 5499712SN/A .desc("Packet count per connected master and slave (bytes)") 5509712SN/A .flags(total | nozero | nonan); 5519712SN/A 55210405Sandreas.hansson@arm.com pktSize 5539712SN/A .init(slavePorts.size(), masterPorts.size()) 55410405Sandreas.hansson@arm.com .name(name() + ".pkt_size") 5559712SN/A .desc("Cumulative packet size per connected master and slave (bytes)") 5569712SN/A .flags(total | nozero | nonan); 5579712SN/A 5589712SN/A // both the packet count and total size are two-dimensional 5599712SN/A // vectors, indexed by slave port id and master port id, thus the 5609712SN/A // neighbouring master and slave, they do not differentiate what 5619712SN/A // came from the master and was forwarded to the slave (requests 5629712SN/A // and snoop responses) and what came from the slave and was 5639712SN/A // forwarded to the master (responses and snoop requests) 5649712SN/A for (int i = 0; i < slavePorts.size(); i++) { 5659712SN/A pktCount.subname(i, slavePorts[i]->getMasterPort().name()); 56610405Sandreas.hansson@arm.com pktSize.subname(i, slavePorts[i]->getMasterPort().name()); 5679712SN/A for (int j = 0; j < masterPorts.size(); j++) { 5689712SN/A pktCount.ysubname(j, masterPorts[j]->getSlavePort().name()); 56910405Sandreas.hansson@arm.com pktSize.ysubname(j, masterPorts[j]->getSlavePort().name()); 5709712SN/A } 5719712SN/A } 5729712SN/A} 5739712SN/A 5749715SN/Atemplate <typename SrcType, typename DstType> 5753470SN/Aunsigned int 57610405Sandreas.hansson@arm.comBaseXBar::Layer<SrcType,DstType>::drain(DrainManager *dm) 5773470SN/A{ 5783470SN/A //We should check that we're not "doing" anything, and that noone is 5793470SN/A //waiting. We might be idle but have someone waiting if the device we 5803470SN/A //contacted for a retry didn't actually retry. 5819612SN/A if (state != IDLE) { 58210405Sandreas.hansson@arm.com DPRINTF(Drain, "Crossbar not drained\n"); 5839342SN/A drainManager = dm; 5843470SN/A return 1; 5853470SN/A } 5865057SN/A return 0; 5873470SN/A} 5889093SN/A 5899715SN/Atemplate <typename SrcType, typename DstType> 5909712SN/Avoid 59110405Sandreas.hansson@arm.comBaseXBar::Layer<SrcType,DstType>::regStats() 5929712SN/A{ 5939712SN/A using namespace Stats; 5949712SN/A 5959712SN/A occupancy 5969712SN/A .name(name() + ".occupancy") 5979712SN/A .desc("Layer occupancy (ticks)") 5989712SN/A .flags(nozero); 5999712SN/A 6009712SN/A utilization 6019712SN/A .name(name() + ".utilization") 6029712SN/A .desc("Layer utilization (%)") 6039712SN/A .precision(1) 6049712SN/A .flags(nozero); 6059712SN/A 6069712SN/A utilization = 100 * occupancy / simTicks; 6079712SN/A} 6089712SN/A 6099093SN/A/** 61010405Sandreas.hansson@arm.com * Crossbar layer template instantiations. Could be removed with _impl.hh 6119093SN/A * file, but since there are only two given options (MasterPort and 6129093SN/A * SlavePort) it seems a bit excessive at this point. 6139093SN/A */ 61410405Sandreas.hansson@arm.comtemplate class BaseXBar::Layer<SlavePort,MasterPort>; 61510405Sandreas.hansson@arm.comtemplate class BaseXBar::Layer<MasterPort,SlavePort>; 616