Add parameters for backwards and forwards sizes for time buffers.

src/base/timebuf.hh:
    Add a function to return the size of the time buffer.

--HG--
extra : convert_revision : 8ffacd8b9013eb76264df065244e00dc1460efd4

src/python/m5/objects/O3CPU.py

@@ -53,6 +53,9 @@ class DerivO3CPU(BaseCPU):
     trapLatency = Param.Tick("Trap latency")
     fetchTrapLatency = Param.Tick("Fetch trap latency")
 
+    backComSize = Param.Unsigned("Time buffer size for backwards communication")
+    forwardComSize = Param.Unsigned("Time buffer size for forward communication")
+
     predType = Param.String("Branch predictor type ('local', 'tournament')")
     localPredictorSize = Param.Unsigned("Size of local predictor")
     localCtrBits = Param.Unsigned("Bits per counter")