xbar.cc revision 10694
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 11210694SMarco.Balboni@ARM.com // Determine how many cycles are needed to send the data 11310694SMarco.Balboni@ARM.com // If the packet has no data we take into account just the cycle to send 11410694SMarco.Balboni@ARM.com // the header. 1159547SN/A unsigned dataCycles = pkt->hasData() ? divCeil(pkt->getSize(), width) : 0; 1163210SN/A 1179549SN/A // before setting the bus delay fields of the packet, ensure that 11810405Sandreas.hansson@arm.com // the delay from any previous crossbar has been accounted for 11910694SMarco.Balboni@ARM.com if (pkt->headerDelay != 0 || pkt->payloadDelay != 0) 12010405Sandreas.hansson@arm.com panic("Packet %s already has delay (%d, %d) that should be " 12110694SMarco.Balboni@ARM.com "accounted for.\n", pkt->cmdString(), pkt->headerDelay, 12210694SMarco.Balboni@ARM.com pkt->payloadDelay); 1239549SN/A 12410694SMarco.Balboni@ARM.com // The headerDelay takes into account the relative time to deliver the 12510694SMarco.Balboni@ARM.com // header of the packet. It will be charged of the additional delay of 12610694SMarco.Balboni@ARM.com // the xbar if the packet goes through it. 12710694SMarco.Balboni@ARM.com pkt->headerDelay = (headerCycles + 1) * clockPeriod() + offset; 1283218SN/A 12910694SMarco.Balboni@ARM.com // The payloadDelay takes into account the relative time to deliver the 13010694SMarco.Balboni@ARM.com // payload of the packet. If the packet has no data its value is just one 13110694SMarco.Balboni@ARM.com // tick (due to header) plus the offset value. 13210694SMarco.Balboni@ARM.com pkt->payloadDelay = (headerCycles + dataCycles) * clockPeriod() + offset; 1335354SN/A} 1345354SN/A 1359715SN/Atemplate <typename SrcType, typename DstType> 13610405Sandreas.hansson@arm.comBaseXBar::Layer<SrcType,DstType>::Layer(DstType& _port, BaseXBar& _xbar, 1379715SN/A const std::string& _name) : 13810405Sandreas.hansson@arm.com port(_port), xbar(_xbar), _name(_name), state(IDLE), drainManager(NULL), 13910347SN/A waitingForPeer(NULL), releaseEvent(this) 1409092SN/A{ 1419092SN/A} 1429092SN/A 1439715SN/Atemplate <typename SrcType, typename DstType> 14410405Sandreas.hansson@arm.comvoid BaseXBar::Layer<SrcType,DstType>::occupyLayer(Tick until) 1455354SN/A{ 14610405Sandreas.hansson@arm.com // ensure the state is busy at this point, as the layer should 1479612SN/A // transition from idle as soon as it has decided to forward the 1489612SN/A // packet to prevent any follow-on calls to sendTiming seeing an 14910405Sandreas.hansson@arm.com // unoccupied layer 1509612SN/A assert(state == BUSY); 1515354SN/A 15210405Sandreas.hansson@arm.com // until should never be 0 as express snoops never occupy the layer 1539091SN/A assert(until != 0); 15410405Sandreas.hansson@arm.com xbar.schedule(releaseEvent, until); 1559091SN/A 1569712SN/A // account for the occupied ticks 1579712SN/A occupancy += until - curTick(); 1589712SN/A 15910405Sandreas.hansson@arm.com DPRINTF(BaseXBar, "The crossbar layer is now busy from tick %d to %d\n", 1609091SN/A curTick(), until); 1613244SN/A} 1623244SN/A 1639715SN/Atemplate <typename SrcType, typename DstType> 1648948SN/Abool 16510405Sandreas.hansson@arm.comBaseXBar::Layer<SrcType,DstType>::tryTiming(SrcType* src_port) 1668948SN/A{ 1679716SN/A // if we are in the retry state, we will not see anything but the 1689716SN/A // retrying port (or in the case of the snoop ports the snoop 1699716SN/A // response port that mirrors the actual slave port) as we leave 1709716SN/A // this state again in zero time if the peer does not immediately 17110405Sandreas.hansson@arm.com // call the layer when receiving the retry 1729716SN/A 1739716SN/A // first we see if the layer is busy, next we check if the 1749716SN/A // destination port is already engaged in a transaction waiting 1759716SN/A // for a retry from the peer 1769716SN/A if (state == BUSY || waitingForPeer != NULL) { 1779716SN/A // the port should not be waiting already 1789716SN/A assert(std::find(waitingForLayer.begin(), waitingForLayer.end(), 1799716SN/A src_port) == waitingForLayer.end()); 1809716SN/A 1819612SN/A // put the port at the end of the retry list waiting for the 1829612SN/A // layer to be freed up (and in the case of a busy peer, for 18310405Sandreas.hansson@arm.com // that transaction to go through, and then the layer to free 1849612SN/A // up) 1859715SN/A waitingForLayer.push_back(src_port); 1869091SN/A return false; 1878948SN/A } 1889091SN/A 1899612SN/A state = BUSY; 1909611SN/A 1919091SN/A return true; 1928948SN/A} 1938948SN/A 1949715SN/Atemplate <typename SrcType, typename DstType> 1958975SN/Avoid 19610405Sandreas.hansson@arm.comBaseXBar::Layer<SrcType,DstType>::succeededTiming(Tick busy_time) 1978948SN/A{ 1989612SN/A // we should have gone from idle or retry to busy in the tryTiming 1999612SN/A // test 2009091SN/A assert(state == BUSY); 2019091SN/A 20210405Sandreas.hansson@arm.com // occupy the layer accordingly 2039092SN/A occupyLayer(busy_time); 2049091SN/A} 2059091SN/A 2069715SN/Atemplate <typename SrcType, typename DstType> 2079091SN/Avoid 20810405Sandreas.hansson@arm.comBaseXBar::Layer<SrcType,DstType>::failedTiming(SrcType* src_port, 2099715SN/A Tick busy_time) 2109091SN/A{ 2119612SN/A // ensure no one got in between and tried to send something to 2129612SN/A // this port 2139715SN/A assert(waitingForPeer == NULL); 2149091SN/A 2159612SN/A // if the source port is the current retrying one or not, we have 2169612SN/A // failed in forwarding and should track that we are now waiting 2179612SN/A // for the peer to send a retry 2189715SN/A waitingForPeer = src_port; 2199612SN/A 2209612SN/A // we should have gone from idle or retry to busy in the tryTiming 2219612SN/A // test 2229612SN/A assert(state == BUSY); 2239091SN/A 2249091SN/A // occupy the bus accordingly 2259092SN/A occupyLayer(busy_time); 2268948SN/A} 2278948SN/A 2289715SN/Atemplate <typename SrcType, typename DstType> 2298948SN/Avoid 23010405Sandreas.hansson@arm.comBaseXBar::Layer<SrcType,DstType>::releaseLayer() 2312657SN/A{ 2328915SN/A // releasing the bus means we should now be idle 2339091SN/A assert(state == BUSY); 2349092SN/A assert(!releaseEvent.scheduled()); 2359091SN/A 2369091SN/A // update the state 2379091SN/A state = IDLE; 2383252SN/A 2399612SN/A // bus layer is now idle, so if someone is waiting we can retry 2409612SN/A if (!waitingForLayer.empty()) { 24110347SN/A // there is no point in sending a retry if someone is still 24210347SN/A // waiting for the peer 24310347SN/A if (waitingForPeer == NULL) 24410347SN/A retryWaiting(); 2459710SN/A } else if (waitingForPeer == NULL && drainManager) { 24610405Sandreas.hansson@arm.com DPRINTF(Drain, "Crossbar done draining, signaling drain manager\n"); 2479091SN/A //If we weren't able to drain before, do it now. 2489342SN/A drainManager->signalDrainDone(); 2493512SN/A // Clear the drain event once we're done with it. 2509342SN/A drainManager = NULL; 2513512SN/A } 2522657SN/A} 2532657SN/A 2549715SN/Atemplate <typename SrcType, typename DstType> 2558915SN/Avoid 25610405Sandreas.hansson@arm.comBaseXBar::Layer<SrcType,DstType>::retryWaiting() 2578915SN/A{ 2589612SN/A // this should never be called with no one waiting 2599612SN/A assert(!waitingForLayer.empty()); 2608915SN/A 2619091SN/A // we always go to retrying from idle 2629091SN/A assert(state == IDLE); 2639091SN/A 2649611SN/A // update the state 2659091SN/A state = RETRY; 2668915SN/A 2679611SN/A // set the retrying port to the front of the retry list and pop it 2689611SN/A // off the list 26910347SN/A SrcType* retryingPort = waitingForLayer.front(); 2709612SN/A waitingForLayer.pop_front(); 2719611SN/A 2729612SN/A // tell the port to retry, which in some cases ends up calling the 27310405Sandreas.hansson@arm.com // layer again 2749611SN/A retryingPort->sendRetry(); 2758915SN/A 27610405Sandreas.hansson@arm.com // If the layer is still in the retry state, sendTiming wasn't 2779612SN/A // called in zero time (e.g. the cache does this), burn a cycle 2789091SN/A if (state == RETRY) { 2799612SN/A // update the state to busy and reset the retrying port, we 2809612SN/A // have done our bit and sent the retry 2819091SN/A state = BUSY; 2829091SN/A 28310405Sandreas.hansson@arm.com // occupy the crossbar layer until the next cycle ends 28410405Sandreas.hansson@arm.com occupyLayer(xbar.clockEdge(Cycles(1))); 2858915SN/A } 2868915SN/A} 2878915SN/A 2889715SN/Atemplate <typename SrcType, typename DstType> 2898915SN/Avoid 29010405Sandreas.hansson@arm.comBaseXBar::Layer<SrcType,DstType>::recvRetry() 2918915SN/A{ 2929612SN/A // we should never get a retry without having failed to forward 2939612SN/A // something to this port 2949715SN/A assert(waitingForPeer != NULL); 2958915SN/A 2969715SN/A // add the port where the failed packet originated to the front of 2979715SN/A // the waiting ports for the layer, this allows us to call retry 29810405Sandreas.hansson@arm.com // on the port immediately if the crossbar layer is idle 2999715SN/A waitingForLayer.push_front(waitingForPeer); 3009612SN/A 3019715SN/A // we are no longer waiting for the peer 3029715SN/A waitingForPeer = NULL; 3039612SN/A 30410405Sandreas.hansson@arm.com // if the layer is idle, retry this port straight away, if we 3059612SN/A // are busy, then simply let the port wait for its turn 3069091SN/A if (state == IDLE) { 3078915SN/A retryWaiting(); 3089612SN/A } else { 3099612SN/A assert(state == BUSY); 3108915SN/A } 3118915SN/A} 3128915SN/A 3139031SN/APortID 31410405Sandreas.hansson@arm.comBaseXBar::findPort(Addr addr) 3152497SN/A{ 3169279SN/A // we should never see any address lookups before we've got the 3179279SN/A // ranges of all connected slave modules 3189279SN/A assert(gotAllAddrRanges); 3199279SN/A 3209279SN/A // Check the cache 3219031SN/A PortID dest_id = checkPortCache(addr); 3229031SN/A if (dest_id != InvalidPortID) 3237523SN/A return dest_id; 3247523SN/A 3259279SN/A // Check the address map interval tree 32610405Sandreas.hansson@arm.com auto i = portMap.find(addr); 3277523SN/A if (i != portMap.end()) { 3287523SN/A dest_id = i->second; 3299279SN/A updatePortCache(dest_id, i->first); 3307523SN/A return dest_id; 3314958SN/A } 3322846SN/A 3332846SN/A // Check if this matches the default range 3347523SN/A if (useDefaultRange) { 3359405SN/A if (defaultRange.contains(addr)) { 33610405Sandreas.hansson@arm.com DPRINTF(AddrRanges, " found addr %#llx on default\n", 3379279SN/A addr); 3389279SN/A return defaultPortID; 3392846SN/A } 3409031SN/A } else if (defaultPortID != InvalidPortID) { 34110405Sandreas.hansson@arm.com DPRINTF(AddrRanges, "Unable to find destination for addr %#llx, " 3428849SN/A "will use default port\n", addr); 3439031SN/A return defaultPortID; 3442846SN/A } 3452846SN/A 3468849SN/A // we should use the range for the default port and it did not 3478849SN/A // match, or the default port is not set 34810405Sandreas.hansson@arm.com fatal("Unable to find destination for addr %#llx on %s\n", addr, 3498849SN/A name()); 3503074SN/A} 3513074SN/A 35210405Sandreas.hansson@arm.com/** Function called by the port when the crossbar is receiving a range change.*/ 3532497SN/Avoid 35410405Sandreas.hansson@arm.comBaseXBar::recvRangeChange(PortID master_port_id) 3552497SN/A{ 35610405Sandreas.hansson@arm.com DPRINTF(AddrRanges, "Received range change from slave port %s\n", 3579407SN/A masterPorts[master_port_id]->getSlavePort().name()); 3589407SN/A 3599279SN/A // remember that we got a range from this master port and thus the 3609279SN/A // connected slave module 3619279SN/A gotAddrRanges[master_port_id] = true; 3622846SN/A 3639279SN/A // update the global flag 3649279SN/A if (!gotAllAddrRanges) { 3659279SN/A // take a logical AND of all the ports and see if we got 3669279SN/A // ranges from everyone 3679279SN/A gotAllAddrRanges = true; 3689279SN/A std::vector<bool>::const_iterator r = gotAddrRanges.begin(); 3699279SN/A while (gotAllAddrRanges && r != gotAddrRanges.end()) { 3709279SN/A gotAllAddrRanges &= *r++; 3719279SN/A } 3729407SN/A if (gotAllAddrRanges) 37310405Sandreas.hansson@arm.com DPRINTF(AddrRanges, "Got address ranges from all slaves\n"); 3749279SN/A } 3752534SN/A 3769279SN/A // note that we could get the range from the default port at any 3779279SN/A // point in time, and we cannot assume that the default range is 3789279SN/A // set before the other ones are, so we do additional checks once 3799279SN/A // all ranges are provided 3809032SN/A if (master_port_id == defaultPortID) { 3819279SN/A // only update if we are indeed checking ranges for the 3829279SN/A // default port since the port might not have a valid range 3839279SN/A // otherwise 3847523SN/A if (useDefaultRange) { 3859279SN/A AddrRangeList ranges = masterPorts[master_port_id]->getAddrRanges(); 3869279SN/A 3879279SN/A if (ranges.size() != 1) 38810405Sandreas.hansson@arm.com fatal("Crossbar %s may only have a single default range", 3899279SN/A name()); 3909279SN/A 3919279SN/A defaultRange = ranges.front(); 3929279SN/A } 3939279SN/A } else { 3949279SN/A // the ports are allowed to update their address ranges 3959279SN/A // dynamically, so remove any existing entries 3969279SN/A if (gotAddrRanges[master_port_id]) { 39710405Sandreas.hansson@arm.com for (auto p = portMap.begin(); p != portMap.end(); ) { 3989279SN/A if (p->second == master_port_id) 3999279SN/A // erasing invalidates the iterator, so advance it 4009279SN/A // before the deletion takes place 4019279SN/A portMap.erase(p++); 4029279SN/A else 4039279SN/A p++; 4043489SN/A } 4052846SN/A } 4062565SN/A 4079279SN/A AddrRangeList ranges = masterPorts[master_port_id]->getAddrRanges(); 4082497SN/A 40910405Sandreas.hansson@arm.com for (const auto& r: ranges) { 41010405Sandreas.hansson@arm.com DPRINTF(AddrRanges, "Adding range %s for id %d\n", 41110405Sandreas.hansson@arm.com r.to_string(), master_port_id); 41210405Sandreas.hansson@arm.com if (portMap.insert(r, master_port_id) == portMap.end()) { 41310405Sandreas.hansson@arm.com PortID conflict_id = portMap.find(r)->second; 41410414SCurtis.Dunham@arm.com fatal("%s has two ports responding within range %s:\n\t%s\n\t%s\n", 4159032SN/A name(), 41610414SCurtis.Dunham@arm.com r.to_string(), 4179032SN/A masterPorts[master_port_id]->getSlavePort().name(), 4188922SN/A masterPorts[conflict_id]->getSlavePort().name()); 4195490SN/A } 4202846SN/A } 4212565SN/A } 4222568SN/A 4239279SN/A // if we have received ranges from all our neighbouring slave 4249279SN/A // modules, go ahead and tell our connected master modules in 4259279SN/A // turn, this effectively assumes a tree structure of the system 4269279SN/A if (gotAllAddrRanges) { 42710405Sandreas.hansson@arm.com DPRINTF(AddrRanges, "Aggregating address ranges\n"); 42810405Sandreas.hansson@arm.com xbarRanges.clear(); 4299564SN/A 4309564SN/A // start out with the default range 4319564SN/A if (useDefaultRange) { 4329564SN/A if (!gotAddrRanges[defaultPortID]) 43310405Sandreas.hansson@arm.com fatal("Crossbar %s uses default range, but none provided", 4349564SN/A name()); 4359564SN/A 43610405Sandreas.hansson@arm.com xbarRanges.push_back(defaultRange); 43710405Sandreas.hansson@arm.com DPRINTF(AddrRanges, "-- Adding default %s\n", 4389564SN/A defaultRange.to_string()); 4399564SN/A } 4409564SN/A 4419564SN/A // merge all interleaved ranges and add any range that is not 4429564SN/A // a subset of the default range 4439564SN/A std::vector<AddrRange> intlv_ranges; 44410405Sandreas.hansson@arm.com for (const auto& r: portMap) { 4459564SN/A // if the range is interleaved then save it for now 44610405Sandreas.hansson@arm.com if (r.first.interleaved()) { 4479564SN/A // if we already got interleaved ranges that are not 4489564SN/A // part of the same range, then first do a merge 4499564SN/A // before we add the new one 4509564SN/A if (!intlv_ranges.empty() && 45110405Sandreas.hansson@arm.com !intlv_ranges.back().mergesWith(r.first)) { 45210405Sandreas.hansson@arm.com DPRINTF(AddrRanges, "-- Merging range from %d ranges\n", 4539564SN/A intlv_ranges.size()); 4549564SN/A AddrRange merged_range(intlv_ranges); 4559564SN/A // next decide if we keep the merged range or not 4569564SN/A if (!(useDefaultRange && 4579564SN/A merged_range.isSubset(defaultRange))) { 45810405Sandreas.hansson@arm.com xbarRanges.push_back(merged_range); 45910405Sandreas.hansson@arm.com DPRINTF(AddrRanges, "-- Adding merged range %s\n", 4609564SN/A merged_range.to_string()); 4619564SN/A } 4629564SN/A intlv_ranges.clear(); 4639564SN/A } 46410405Sandreas.hansson@arm.com intlv_ranges.push_back(r.first); 4659564SN/A } else { 4669564SN/A // keep the current range if not a subset of the default 4679564SN/A if (!(useDefaultRange && 46810405Sandreas.hansson@arm.com r.first.isSubset(defaultRange))) { 46910405Sandreas.hansson@arm.com xbarRanges.push_back(r.first); 47010405Sandreas.hansson@arm.com DPRINTF(AddrRanges, "-- Adding range %s\n", 47110405Sandreas.hansson@arm.com r.first.to_string()); 4729564SN/A } 4739564SN/A } 4749564SN/A } 4759564SN/A 4769564SN/A // if there is still interleaved ranges waiting to be merged, 4779564SN/A // go ahead and do it 4789564SN/A if (!intlv_ranges.empty()) { 47910405Sandreas.hansson@arm.com DPRINTF(AddrRanges, "-- Merging range from %d ranges\n", 4809564SN/A intlv_ranges.size()); 4819564SN/A AddrRange merged_range(intlv_ranges); 4829564SN/A if (!(useDefaultRange && merged_range.isSubset(defaultRange))) { 48310405Sandreas.hansson@arm.com xbarRanges.push_back(merged_range); 48410405Sandreas.hansson@arm.com DPRINTF(AddrRanges, "-- Adding merged range %s\n", 4859564SN/A merged_range.to_string()); 4869564SN/A } 4879564SN/A } 4889564SN/A 4899279SN/A // also check that no range partially overlaps with the 4909279SN/A // default range, this has to be done after all ranges are set 4919279SN/A // as there are no guarantees for when the default range is 4929279SN/A // update with respect to the other ones 4939279SN/A if (useDefaultRange) { 49410405Sandreas.hansson@arm.com for (const auto& r: xbarRanges) { 4959564SN/A // see if the new range is partially 4969564SN/A // overlapping the default range 49710405Sandreas.hansson@arm.com if (r.intersects(defaultRange) && 49810405Sandreas.hansson@arm.com !r.isSubset(defaultRange)) 4999564SN/A fatal("Range %s intersects the " \ 5009564SN/A "default range of %s but is not a " \ 50110405Sandreas.hansson@arm.com "subset\n", r.to_string(), name()); 5029279SN/A } 5039279SN/A } 5049279SN/A 5059279SN/A // tell all our neighbouring master ports that our address 5069279SN/A // ranges have changed 50710405Sandreas.hansson@arm.com for (const auto& s: slavePorts) 50810405Sandreas.hansson@arm.com s->sendRangeChange(); 5099279SN/A } 5109279SN/A 5119279SN/A clearPortCache(); 5122497SN/A} 5132497SN/A 5148711SN/AAddrRangeList 51510405Sandreas.hansson@arm.comBaseXBar::getAddrRanges() const 5162497SN/A{ 5179279SN/A // we should never be asked without first having sent a range 5189279SN/A // change, and the latter is only done once we have all the ranges 5199279SN/A // of the connected devices 5209279SN/A assert(gotAllAddrRanges); 5212568SN/A 5229407SN/A // at the moment, this never happens, as there are no cycles in 52310405Sandreas.hansson@arm.com // the range queries and no devices on the master side of a crossbar 5249407SN/A // (CPU, cache, bridge etc) actually care about the ranges of the 5259407SN/A // ports they are connected to 5269407SN/A 52710405Sandreas.hansson@arm.com DPRINTF(AddrRanges, "Received address range request\n"); 5282846SN/A 52910405Sandreas.hansson@arm.com return xbarRanges; 5308711SN/A} 5318711SN/A 5329712SN/Avoid 53310405Sandreas.hansson@arm.comBaseXBar::regStats() 5349712SN/A{ 5359712SN/A using namespace Stats; 5369712SN/A 5379712SN/A transDist 5389712SN/A .init(MemCmd::NUM_MEM_CMDS) 5399712SN/A .name(name() + ".trans_dist") 5409712SN/A .desc("Transaction distribution") 5419712SN/A .flags(nozero); 5429712SN/A 5439712SN/A // get the string representation of the commands 5449712SN/A for (int i = 0; i < MemCmd::NUM_MEM_CMDS; i++) { 5459712SN/A MemCmd cmd(i); 5469712SN/A const std::string &cstr = cmd.toString(); 5479712SN/A transDist.subname(i, cstr); 5489712SN/A } 5499712SN/A 5509712SN/A pktCount 5519712SN/A .init(slavePorts.size(), masterPorts.size()) 5529712SN/A .name(name() + ".pkt_count") 5539712SN/A .desc("Packet count per connected master and slave (bytes)") 5549712SN/A .flags(total | nozero | nonan); 5559712SN/A 55610405Sandreas.hansson@arm.com pktSize 5579712SN/A .init(slavePorts.size(), masterPorts.size()) 55810405Sandreas.hansson@arm.com .name(name() + ".pkt_size") 5599712SN/A .desc("Cumulative packet size per connected master and slave (bytes)") 5609712SN/A .flags(total | nozero | nonan); 5619712SN/A 5629712SN/A // both the packet count and total size are two-dimensional 5639712SN/A // vectors, indexed by slave port id and master port id, thus the 5649712SN/A // neighbouring master and slave, they do not differentiate what 5659712SN/A // came from the master and was forwarded to the slave (requests 5669712SN/A // and snoop responses) and what came from the slave and was 5679712SN/A // forwarded to the master (responses and snoop requests) 5689712SN/A for (int i = 0; i < slavePorts.size(); i++) { 5699712SN/A pktCount.subname(i, slavePorts[i]->getMasterPort().name()); 57010405Sandreas.hansson@arm.com pktSize.subname(i, slavePorts[i]->getMasterPort().name()); 5719712SN/A for (int j = 0; j < masterPorts.size(); j++) { 5729712SN/A pktCount.ysubname(j, masterPorts[j]->getSlavePort().name()); 57310405Sandreas.hansson@arm.com pktSize.ysubname(j, masterPorts[j]->getSlavePort().name()); 5749712SN/A } 5759712SN/A } 5769712SN/A} 5779712SN/A 5789715SN/Atemplate <typename SrcType, typename DstType> 5793470SN/Aunsigned int 58010405Sandreas.hansson@arm.comBaseXBar::Layer<SrcType,DstType>::drain(DrainManager *dm) 5813470SN/A{ 5823470SN/A //We should check that we're not "doing" anything, and that noone is 5833470SN/A //waiting. We might be idle but have someone waiting if the device we 5843470SN/A //contacted for a retry didn't actually retry. 5859612SN/A if (state != IDLE) { 58610405Sandreas.hansson@arm.com DPRINTF(Drain, "Crossbar not drained\n"); 5879342SN/A drainManager = dm; 5883470SN/A return 1; 5893470SN/A } 5905057SN/A return 0; 5913470SN/A} 5929093SN/A 5939715SN/Atemplate <typename SrcType, typename DstType> 5949712SN/Avoid 59510405Sandreas.hansson@arm.comBaseXBar::Layer<SrcType,DstType>::regStats() 5969712SN/A{ 5979712SN/A using namespace Stats; 5989712SN/A 5999712SN/A occupancy 6009712SN/A .name(name() + ".occupancy") 6019712SN/A .desc("Layer occupancy (ticks)") 6029712SN/A .flags(nozero); 6039712SN/A 6049712SN/A utilization 6059712SN/A .name(name() + ".utilization") 6069712SN/A .desc("Layer utilization (%)") 6079712SN/A .precision(1) 6089712SN/A .flags(nozero); 6099712SN/A 6109712SN/A utilization = 100 * occupancy / simTicks; 6119712SN/A} 6129712SN/A 6139093SN/A/** 61410405Sandreas.hansson@arm.com * Crossbar layer template instantiations. Could be removed with _impl.hh 6159093SN/A * file, but since there are only two given options (MasterPort and 6169093SN/A * SlavePort) it seems a bit excessive at this point. 6179093SN/A */ 61810405Sandreas.hansson@arm.comtemplate class BaseXBar::Layer<SlavePort,MasterPort>; 61910405Sandreas.hansson@arm.comtemplate class BaseXBar::Layer<MasterPort,SlavePort>; 620