mem: Add tryTiming suppport to CommMonitor

The CommMonitor did not support tryTiming, which resulted in gem5
panicing if the CommMonitor was used.

With this change, we update the CommMonitor pass through the
tryTiming() calls.

Change-Id: I86810170e5e10a0c5d63af76fc4a6ab70710d2fb
Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com>
Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>
Reviewed-on: https://gem5-review.googlesource.com/c/15736
Reviewed-by: Jason Lowe-Power <jason@lowepower.com>
Maintainer: Nikos Nikoleris <nikos.nikoleris@arm.com>
Maintainer: Jason Lowe-Power <jason@lowepower.com>

src/mem/comm_monitor.cc

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2012-2013, 2015 ARM Limited
+ * Copyright (c) 2012-2013, 2015, 2018 ARM Limited
  * Copyright (c) 2016 Google Inc.
  * Copyright (c) 2017, Centre National de la Recherche Scientifique
  * All rights reserved.
@@ -374,6 +374,12 @@ CommMonitor::recvRespRetry()
     masterPort.sendRetryResp();
 }
 
+bool
+CommMonitor::tryTiming(PacketPtr pkt)
+{
+    return masterPort.tryTiming(pkt);
+}
+
 void
 CommMonitor::recvRangeChange()
 {

src/mem/comm_monitor.hh

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2012-2013, 2015 ARM Limited
+ * Copyright (c) 2012-2013, 2015, 2018 ARM Limited
  * Copyright (c) 2016 Google Inc.
  * Copyright (c) 2017, Centre National de la Recherche Scientifique
  * All rights reserved.
@@ -232,6 +232,11 @@ class CommMonitor : public MemObject
             mon.recvRespRetry();
         }
 
+        bool tryTiming(PacketPtr pkt)
+        {
+            return mon.tryTiming(pkt);
+        }
+
       private:
 
         CommMonitor& mon;
@@ -269,6 +274,8 @@ class CommMonitor : public MemObject
 
     void recvRangeChange();
 
+    bool tryTiming(PacketPtr pkt);
+
     /** Stats declarations, all in a struct for convenience. */
     struct MonitorStats
     {