diff options
Diffstat (limited to 'src/mem/cache')
| -rw-r--r-- | src/mem/cache/BaseCache.py | 1 | ||||
| -rw-r--r-- | src/mem/cache/base.cc | 1 | ||||
| -rw-r--r-- | src/mem/cache/base.hh | 5 | ||||
| -rw-r--r-- | src/mem/cache/cache_impl.hh | 2 |
4 files changed, 8 insertions, 1 deletions
diff --git a/src/mem/cache/BaseCache.py b/src/mem/cache/BaseCache.py index dffac2234..5c7ae5274 100644 --- a/src/mem/cache/BaseCache.py +++ b/src/mem/cache/BaseCache.py @@ -48,6 +48,7 @@ class BaseCache(MemObject): size = Param.MemorySize("capacity in bytes") forward_snoops = Param.Bool(True, "forward snoops from mem side to cpu side") + is_top_level = Param.Bool(False, "Is this cache at the top level (e.g. L1)") subblock_size = Param.Int(0, "Size of subblock in IIC used for compression") tgts_per_mshr = Param.Int("max number of accesses per MSHR") diff --git a/src/mem/cache/base.cc b/src/mem/cache/base.cc index 9166e1a09..b7e331d54 100644 --- a/src/mem/cache/base.cc +++ b/src/mem/cache/base.cc @@ -58,6 +58,7 @@ BaseCache::BaseCache(const Params *p) hitLatency(p->latency), numTarget(p->tgts_per_mshr), forwardSnoops(p->forward_snoops), + isTopLevel(p->is_top_level), blocked(0), noTargetMSHR(NULL), missCount(p->max_miss_count), diff --git a/src/mem/cache/base.hh b/src/mem/cache/base.hh index e8a644296..28ddf5054 100644 --- a/src/mem/cache/base.hh +++ b/src/mem/cache/base.hh @@ -194,6 +194,11 @@ class BaseCache : public MemObject /** Do we forward snoops from mem side port through to cpu side port? */ bool forwardSnoops; + /** Is this cache a toplevel cache (e.g. L1, I/O cache). If so we should + * never try to forward ownership and similar optimizations to the cpu + * side */ + bool isTopLevel; + /** * Bit vector of the blocking reasons for the access path. * @sa #BlockedCause diff --git a/src/mem/cache/cache_impl.hh b/src/mem/cache/cache_impl.hh index e4e4a3c92..0b2b273f9 100644 --- a/src/mem/cache/cache_impl.hh +++ b/src/mem/cache/cache_impl.hh @@ -216,7 +216,7 @@ Cache<TagStore>::satisfyCpuSideRequest(PacketPtr pkt, BlkType *blk, if (blk->isDirty()) { // special considerations if we're owner: - if (!deferred_response) { + if (!deferred_response && !isTopLevel) { // if we are responding immediately and can // signal that we're transferring ownership // along with exclusivity, do so |