| mshr.cc (10821:581fb2484bd6) | mshr.cc (10826:fe0b1f40ea5a) |
|---|---|
| 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 --- 351 unchanged lines hidden (view full) --- 360 // transaction completes. 361 362 // Actual target device (typ. a memory) will delete the 363 // packet on reception, so we need to save a copy here. 364 365 // Clear flags and also allocate new data as the original 366 // packet data storage may have been deleted by the time we 367 // get to send this packet. | 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 --- 351 unchanged lines hidden (view full) --- 360 // transaction completes. 361 362 // Actual target device (typ. a memory) will delete the 363 // packet on reception, so we need to save a copy here. 364 365 // Clear flags and also allocate new data as the original 366 // packet data storage may have been deleted by the time we 367 // get to send this packet. |
| 368 PacketPtr cp_pkt = new Packet(pkt, true, true); 369 targets.add(cp_pkt, curTick(), _order, Target::FromSnoop, 370 downstreamPending && targets.needsExclusive); | 368 PacketPtr cp_pkt = nullptr; |
| 371 372 if (isPendingDirty()) { | 369 370 if (isPendingDirty()) { |
| 371 // Case 1: The new packet will need to get the response from the 372 // MSHR already queued up here 373 cp_pkt = new Packet(pkt, true, true); |
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| 373 pkt->assertMemInhibit(); 374 // in the case of an uncacheable request there is no need 375 // to set the exclusive flag, but since the recipient does 376 // not care there is no harm in doing so 377 pkt->setSupplyExclusive(); | 374 pkt->assertMemInhibit(); 375 // in the case of an uncacheable request there is no need 376 // to set the exclusive flag, but since the recipient does 377 // not care there is no harm in doing so 378 pkt->setSupplyExclusive(); |
| 379 } else { 380 // Case 2: We only need to buffer the packet for information 381 // purposes; the original request can proceed without waiting 382 // => Create a copy of the request, as that may get deallocated as 383 // well 384 cp_pkt = new Packet(new Request(*pkt->req), pkt->cmd); 385 DPRINTF(Cache, "Copying packet %p -> %p and request %p -> %p\n", 386 pkt, cp_pkt, pkt->req, cp_pkt->req); |
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| 378 } | 387 } |
| 388 targets.add(cp_pkt, curTick(), _order, Target::FromSnoop, 389 downstreamPending && targets.needsExclusive); |
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| 379 380 if (pkt->needsExclusive()) { 381 // This transaction will take away our pending copy 382 postInvalidate = true; 383 } 384 } 385 386 if (!pkt->needsExclusive() && !pkt->req->isUncacheable()) { --- 104 unchanged lines hidden --- | 390 391 if (pkt->needsExclusive()) { 392 // This transaction will take away our pending copy 393 postInvalidate = true; 394 } 395 } 396 397 if (!pkt->needsExclusive() && !pkt->req->isUncacheable()) { --- 104 unchanged lines hidden --- |