style: eliminate explicit boolean comparisons

[gem5.git] / src / mem / XBar.py

diff --git a/src/mem/XBar.py b/src/mem/XBar.py
index a445b5e37ec45c7e8c2223d4b2baaae1d233af97..8614519b3ffdd2a8f1f62d2b6242677f64922b55 100644 (file)
--- a/src/mem/XBar.py
+++ b/src/mem/XBar.py
@@ -112,6 +112,9 @@ class SnoopFilter(SimObject):
 
     system = Param.System(Parent.any, "System that the crossbar belongs to.")
 
+    # Sanity check on max capacity to track, adjust if needed.
+    max_capacity = Param.MemorySize('8MB', "Maximum capacity of snoop filter")
+
 # We use a coherent crossbar to connect multiple masters to the L2
 # caches. Normally this crossbar would be part of the cache itself.
 class L2XBar(CoherentXBar):
@@ -125,6 +128,11 @@ class L2XBar(CoherentXBar):
     response_latency = 1
     snoop_response_latency = 1
 
+    # Use a snoop-filter by default, and set the latency to zero as
+    # the lookup is assumed to overlap with the frontend latency of
+    # the crossbar
+    snoop_filter = SnoopFilter(lookup_latency = 0)
+
 # One of the key coherent crossbar instances is the system
 # interconnect, tying together the CPU clusters, GPUs, and any I/O
 # coherent masters, and DRAM controllers.