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ruby: mesi two,three level: copy data only when dirty

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The level 2 controller has a bug. In one particular action, the data block was
copied from a message irrespective whether the block is dirty or not.  In cases
when L1 sends no data, the data value copied was incorrect.
This commit is contained in:
Nilay Vaish 2015-08-03 22:44:28 -05:00
parent 3d782f8df7
commit 9bf3b8828a
1 changed files with 1 additions and 1 deletions
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2
src/mem/protocol/MESI_Two_Level-L2cache.sm
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@ -628,8 +628,8 @@ machine(L2Cache, "MESI Directory L2 Cache CMP")
action(mr_writeDataToCacheFromRequest, "mr", desc="Write data from response queue to cache") {
peek(L1RequestL2Network_in, RequestMsg) {
assert(is_valid(cache_entry));
cache_entry.DataBlk := in_msg.DataBlk;
if (in_msg.Dirty) {
cache_entry.DataBlk := in_msg.DataBlk;
cache_entry.Dirty := in_msg.Dirty;
}
}