rocketchip: generate GraphML output

src/main/scala/rocketchip/BaseTop.scala

@@ -8,7 +8,7 @@ import junctions._
 import uncore.tilelink._
 import uncore.tilelink2._
 import uncore.devices._
-import util.{ParameterizedBundle, ConfigStringOutput}
+import util.{ParameterizedBundle, ConfigStringOutput, GraphMLOutput}
 import rocket._
 import rocket.Util._
 import coreplex._
@@ -91,6 +91,7 @@ abstract class BaseTopModule[+L <: BaseTop, +B <: BaseTopBundle](
   println("Generated Configuration String")
   println(p(ConfigString))
   ConfigStringOutput.contents = Some(p(ConfigString))
+  GraphMLOutput.contents = Some(outer.graphML)
 
   io.success := coreplexIO.success
 }

src/main/scala/rocketchip/Generator.scala

@@ -79,5 +79,6 @@ object Generator extends util.GeneratorApp {
   generateTestSuiteMakefrags
   generateDSEConstraints
   generateConfigString
+  generateGraphML
   generateParameterDump
 }

src/main/scala/util/GeneratorUtils.scala

@@ -117,9 +117,17 @@ trait GeneratorApp extends App with HasGeneratorUtilities {
   def generateConfigString {
     ConfigStringOutput.contents.foreach(c => writeOutputFile(td, s"${names.configs}.cfg", c))
   }
+
+  /** Output a global LazyModule topology for documentation purposes. */
+  def generateGraphML {
+    GraphMLOutput.contents.foreach(c => writeOutputFile(td, s"${names.configs}.graphml", c))
+  }
 }
 
 object ConfigStringOutput {
   var contents: Option[String] = None
 }
 
+object GraphMLOutput {
+  var contents: Option[String] = None
+}