Add IOHelper

src/main/scala/prci/IOHelper.scala

@@ -0,0 +1,21 @@
+// See LICENSE.SiFive for license details.
+// See LICENSE.Berkeley for license details.
+package freechips.rocketchip.prci
+
+import Chisel._
+import chisel3.experimental.IO
+import freechips.rocketchip.diplomacy._
+
+object IOHelper {
+
+  def forNonSynchronous[T <: Data](gen: => T, xs: Seq[ClockCrossingType], prefix: String): Seq[Option[ModuleValue[T]]] = {
+   xs.zipWithIndex.map { case (x, i) => forNonSynchronous(gen, x, prefix + s"_$i") }
+  }
+
+  def forNonSynchronous[T <: Data](gen: => T, x: ClockCrossingType, name: String): Option[ModuleValue[T]] = {
+    x match {
+      case SynchronousCrossing(_) => None
+      case _ => Some(InModuleBody(IO(gen.asInput).suggestName(name)))
+    }
+  }
+}