diff options
Diffstat (limited to 'src/cpu/o3')
| -rw-r--r-- | src/cpu/o3/lsq_unit_impl.hh | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/src/cpu/o3/lsq_unit_impl.hh b/src/cpu/o3/lsq_unit_impl.hh index 8e12e990b..799759557 100644 --- a/src/cpu/o3/lsq_unit_impl.hh +++ b/src/cpu/o3/lsq_unit_impl.hh @@ -1,5 +1,5 @@ /* - * Copyright (c) 2010-2011 ARM Limited + * Copyright (c) 2010-2012 ARM Limited * All rights reserved * * The license below extends only to copyright in the software and shall @@ -435,6 +435,18 @@ LSQUnit<Impl>::checkSnoop(PacketPtr pkt) cacheBlockMask = ~(bs - 1); } + // Unlock the cpu-local monitor when the CPU sees a snoop to a locked + // address. The CPU can speculatively execute a LL operation after a pending + // SC operation in the pipeline and that can make the cache monitor the CPU + // is connected to valid while it really shouldn't be. + for (int x = 0; x < cpu->numActiveThreads(); x++) { + ThreadContext *tc = cpu->getContext(x); + bool no_squash = cpu->thread[x]->noSquashFromTC; + cpu->thread[x]->noSquashFromTC = true; + TheISA::handleLockedSnoop(tc, pkt, cacheBlockMask); + cpu->thread[x]->noSquashFromTC = no_squash; + } + // If this is the only load in the LSQ we don't care if (load_idx == loadTail) return; |