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, 2 insertions, 4 deletions

diff --git a/src/mem/dram_ctrl.cc b/src/mem/dram_ctrl.cc
index 4bd83f761..abf570910 100644
--- a/src/mem/dram_ctrl.cc
+++ b/src/mem/dram_ctrl.cc
@@ -590,10 +590,8 @@ DRAMCtrl::recvTimingReq(PacketPtr pkt)
     DPRINTF(DRAM, "recvTimingReq: request %s addr %lld size %d\n",
             pkt->cmdString(), pkt->getAddr(), pkt->getSize());
 
-    // simply drop inhibited packets and clean evictions
-    if (pkt->memInhibitAsserted() ||
-        pkt->cmd == MemCmd::CleanEvict) {
-        DPRINTF(DRAM, "Inhibited packet or clean evict -- Dropping it now\n");
+    // sink inhibited packets without further action
+    if (pkt->memInhibitAsserted()) {
         pendingDelete.reset(pkt);
         return true;
     }