coreplex: make HasTiles more generic

HasTiles now deals with only extremely general tile IOs.
Some RocketTiles specific behavior moved into RocketCoreplex.
BaseTile now has optional LocalInterruptNode.

src/main/scala/tile/BaseTile.scala

@@ -6,6 +6,7 @@ import Chisel._
 
 import freechips.rocketchip.config._
 import freechips.rocketchip.diplomacy._
+import freechips.rocketchip.interrupts._
 import freechips.rocketchip.rocket._
 import freechips.rocketchip.tilelink._
 import freechips.rocketchip.util._
@@ -111,6 +112,7 @@ trait CanHaveInstructionTracePort extends Bundle with HasTileParameters {
 abstract class BaseTile(tileParams: TileParams)(implicit p: Parameters) extends BareTile
     with HasTileParameters {
   def module: BaseTileModule[BaseTile, BaseTileBundle[BaseTile]]
+  val localIntNode: Option[IntInwardNode]
 }
 
 abstract class BaseTileBundle[+L <: BaseTile](_outer: L) extends BareTileBundle(_outer)

src/main/scala/tile/Interrupts.scala

@@ -5,7 +5,7 @@ package freechips.rocketchip.tile
 import Chisel._
 
 import freechips.rocketchip.config.Parameters
-import freechips.rocketchip.interrupts.{IntSinkNode, IntSinkPortSimple}
+import freechips.rocketchip.interrupts._
 import freechips.rocketchip.util._
 
 class TileInterrupts(implicit p: Parameters) extends CoreBundle()(p) {
@@ -23,6 +23,7 @@ trait HasExternalInterrupts extends HasTileParameters {
   val module: HasExternalInterruptsModule
 
   val intNode = IntSinkNode(IntSinkPortSimple())
+  val localIntNode: Option[IntInwardNode] = None
 
   // TODO: the order of the following two functions must match, and
   //         also match the order which things are connected to the

src/main/scala/tile/RocketTile.scala

@@ -230,6 +230,7 @@ class RocketTileWrapper(
   }
 
   val intXbar = LazyModule(new IntXbar)
+  val localIntNode = Some(intXbar.intnode)
   rocket.intNode := intXbar.intnode
 
   override lazy val module = new BaseTileModule(this, () => new RocketTileWrapperBundle(this)) {