From 080d4e08d627b5b726afec71d38370373b7376c5 Mon Sep 17 00:00:00 2001
From: Andreas Hansson <andreas.hansson@arm.com>
Date: Fri, 12 Aug 2016 14:11:45 +0100
Subject: mem: Add snoop filter to SystemXBar by default

This patch changes the default behaviour of the SystemXBar, adding a
snoop filter. With the recent updates to the snoop filter allocation
behaviour this change no longer causes problems for the regressions
without caches.

Change-Id: Ibe0cd437b71b2ede9002384126553679acc69cc1
Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com>
Reviewed-by: Jason Lowe-Power <jason@lowepower.com>
Reviewed-by: Tony Gutierrez <anthony.gutierrez@amd.com>
---
 src/mem/XBar.py | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'src/mem')

diff --git a/src/mem/XBar.py b/src/mem/XBar.py
index 674f9262e..59f0d8d8d 100644
--- a/src/mem/XBar.py
+++ b/src/mem/XBar.py
@@ -153,6 +153,9 @@ class SystemXBar(CoherentXBar):
     response_latency = 2
     snoop_response_latency = 4
 
+    # Use a snoop-filter by default
+    snoop_filter = SnoopFilter(lookup_latency = 1)
+
     # This specialisation of the coherent crossbar is to be considered
     # the point of coherency, as there are no (coherent) downstream
     # caches.
-- 
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