make sure outer probe and finish lines are disconnected

uncore/src/main/scala/agents/Agents.scala

@@ -151,4 +151,11 @@ abstract class HierarchicalCoherenceAgent(implicit p: Parameters) extends Cohere
   def innerTL = io.inner
   def outerTL = io.outer
   def incoherent = io.incoherent
+
+  // TODO: Remove this function (and all its calls) when we support probing the L2
+  def disconnectOuterProbeAndFinish() {
+    io.outer.probe.ready := Bool(false)
+    io.outer.finish.valid := Bool(false)
+    assert(!io.outer.probe.valid, "L2 agent got illegal probe")
+  }
 }

uncore/src/main/scala/agents/Broadcast.scala

@@ -54,6 +54,8 @@ class L2BroadcastHub(implicit p: Parameters) extends HierarchicalCoherenceAgent(
   doOutputArbitration(io.inner.grant, trackerList.map(_.io.inner.grant))
 
   doInputRouting(io.inner.finish, trackerList.map(_.io.inner.finish))
+
+  disconnectOuterProbeAndFinish()
 }
 
 class BroadcastXactTracker(implicit p: Parameters) extends XactTracker()(p) {

uncore/src/main/scala/agents/Bufferless.scala

@@ -67,6 +67,8 @@ class BufferlessBroadcastHub(implicit p: Parameters) extends HierarchicalCoheren
   io.inner.grant.bits.addr_beat := io.outer.grant.bits.addr_beat
 
   doInputRouting(io.inner.finish, trackerList.map(_.io.inner.finish))
+
+  disconnectOuterProbeAndFinish()
 }
 
 class BufferlessBroadcastVoluntaryReleaseTracker(trackerId: Int)(implicit p: Parameters)

uncore/src/main/scala/agents/Cache.scala

@@ -442,6 +442,8 @@ class L2HellaCacheBank(implicit p: Parameters) extends HierarchicalCoherenceAgen
   tshrfile.io.incoherent <> io.incoherent
   meta.io <> tshrfile.io.meta
   data.io <> tshrfile.io.data
+
+  disconnectOuterProbeAndFinish()
 }
 
 class TSHRFileIO(implicit p: Parameters) extends HierarchicalTLIO()(p)

uncore/src/main/scala/agents/StatelessBridge.scala

@@ -66,5 +66,6 @@ class ManagerToClientStatelessBridge(implicit p: Parameters) extends Hierarchica
 
   io.inner.probe.valid := Bool(false)
   io.inner.finish.ready := Bool(true)
-}
 
+  disconnectOuterProbeAndFinish()
+}