| 1/* 2 * Copyright (c) 2012-2013, 2015 ARM Limited 3 * All rights reserved. 4 * 5 * The license below extends only to copyright in the software and shall 6 * not be construed as granting a license to any other intellectual 7 * property including but not limited to intellectual property relating 8 * to a hardware implementation of the functionality of the software --- 259 unchanged lines hidden (view full) --- 268} 269 270/* 271 * Adds a target to an MSHR 272 */ 273void 274MSHR::allocateTarget(PacketPtr pkt, Tick whenReady, Counter _order) 275{ |
| 276 // assume we'd never issue a prefetch when we've got an 277 // outstanding miss 278 assert(pkt->cmd != MemCmd::HardPFReq); 279 280 // uncacheable accesses always allocate a new MSHR, and cacheable 281 // accesses ignore any uncacheable MSHRs, thus we should never 282 // have targets addded if originally allocated uncacheable 283 assert(!_isUncacheable); 284 |
| 285 // if there's a request already in service for this MSHR, we will 286 // have to defer the new target until after the response if any of 287 // the following are true: 288 // - there are other targets already deferred 289 // - there's a pending invalidate to be applied after the response 290 // comes back (but before this target is processed) 291 // - this target requires an exclusive block and either we're not 292 // getting an exclusive block back or we have already snooped 293 // another read request that will downgrade our exclusive block 294 // to shared |
| 295 if (inService && 296 (!deferredTargets.empty() || hasPostInvalidate() || 297 (pkt->needsExclusive() && 298 (!isPendingDirty() || hasPostDowngrade() || isForward)))) { 299 // need to put on deferred list 300 if (hasPostInvalidate()) 301 replaceUpgrade(pkt); 302 deferredTargets.add(pkt, whenReady, _order, Target::FromCPU, true); --- 185 unchanged lines hidden --- |