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| author | Andreas Hansson <andreas.hansson@arm.com> | 2015-06-09 09:21:17 -0400 |
|---|---|---|
| committer | Andreas Hansson <andreas.hansson@arm.com> | 2015-06-09 09:21:17 -0400 |
| commit | 578a7f20c647e4051e137bdb219cec450a741ca6 (patch) | |
| tree | f028a77426e0c6a32933c173a2f806e5aa93cba3 /src/mem/cache | |
| parent | eb3ed11794667975476a4ec3b070e215c2c5dc12 (diff) | |
| download | gem5-578a7f20c647e4051e137bdb219cec450a741ca6.tar.xz | |
mem: Fix snoop packet data allocation bug
This patch fixes an issue where the snoop packet did not properly
forward the data pointer in case of static data.
Diffstat (limited to 'src/mem/cache')
| -rw-r--r-- | src/mem/cache/cache_impl.hh | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/src/mem/cache/cache_impl.hh b/src/mem/cache/cache_impl.hh index 734ca826c..9c5070ffa 100644 --- a/src/mem/cache/cache_impl.hh +++ b/src/mem/cache/cache_impl.hh @@ -1610,7 +1610,11 @@ Cache::handleSnoop(PacketPtr pkt, CacheBlk *blk, bool is_timing, // rewritten to be relative to cpu-side bus (if any) bool alreadyResponded = pkt->memInhibitAsserted(); if (is_timing) { - Packet snoopPkt(pkt, true, false); // clear flags, no allocation + // copy the packet so that we can clear any flags before + // forwarding it upwards, we also allocate data (passing + // the pointer along in case of static data), in case + // there is a snoop hit in upper levels + Packet snoopPkt(pkt, true, true); snoopPkt.setExpressSnoop(); snoopPkt.pushSenderState(new ForwardResponseRecord()); // the snoop packet does not need to wait any additional @@ -1622,6 +1626,8 @@ Cache::handleSnoop(PacketPtr pkt, CacheBlk *blk, bool is_timing, assert(!alreadyResponded); pkt->assertMemInhibit(); } else { + // no cache (or anyone else for that matter) will + // respond, so delete the ForwardResponseRecord here delete snoopPkt.popSenderState(); } if (snoopPkt.sharedAsserted()) { |