mem: Align rules for sinking inhibited packets at the slave

This patch aligns how the memory-system slaves, i.e. the various
memory controllers and the bridge, identify and deal with sinking of
inhibited packets that are only useful within the coherent part of the
memory system.

In the future we could shift the onus to the crossbar, and add a
parameter "is_point_of_coherence" that would allow it to sink the
aforementioned packets.

1 files changed, 6 insertions, 0 deletions

diff --git a/src/mem/bridge.hh b/src/mem/bridge.hh
index 6aebe5204..ad3585997 100644
--- a/src/mem/bridge.hh
+++ b/src/mem/bridge.hh
@@ -136,6 +136,12 @@ class Bridge : public MemObject
         unsigned int respQueueLimit;
 
         /**
+         * Upstream caches need this packet until true is returned, so
+         * hold it for deletion until a subsequent call
+         */
+        std::unique_ptr<Packet> pendingDelete;
+
+        /**
          * Is this side blocked from accepting new response packets.
          *
          * @return true if the reserved space has reached the set limit