[misc] add test to generate config json

tests/elaborate/src/TLCrossBarParameterSerializerTest.scala

@@ -0,0 +1,54 @@
+package tests.elaborate
+
+import chisel3.util.experimental.BitSet
+import upickle.default._
+
+import org.chipsalliance.tilelink.bundle.TLLinkParameter
+import org.chipsalliance.tilelink.xbar._
+
+object TLCrossBarParameterSerializerTest {
+  def main(args: Array[String]): Unit = {
+    val linkParameter : TLLinkParameter = TLLinkParameter(
+      addressWidth = 32,
+      sourceWidth = 2,
+      sinkWidth = 2,
+      dataWidth = 64,
+      sizeWidth = 4,
+      hasBCEChannels = true
+    )
+
+    val masterLinkParameter = Seq(TLCrossBarMasterLinkParameter(
+      linkParameter = linkParameter,
+      adVisibility = BitSet.fromString("b??"),
+      bceVisibility = BitSet.fromString("b??"),
+      srcIdRange = TLIdRange(0, 1)
+    ))
+
+    val slaveLinkParameter = Seq(TLCrossBarSlaveLinkParameter(
+      linkParameter = linkParameter,
+      adVisibility = BitSet.fromString("b??"),
+      bceVisibility = BitSet.fromString("b??"),
+      sinkIdRange = TLIdRange(0, 1),
+      addressRange = BitSet.fromRange(0x80000000, 0x10000, 32)
+    ),
+      TLCrossBarSlaveLinkParameter(
+        linkParameter = linkParameter,
+        adVisibility = BitSet.fromString("b??"),
+        bceVisibility = BitSet.fromString("b??"),
+        sinkIdRange = TLIdRange(2, 3),
+        addressRange = BitSet.fromRange(0x80010000, 0x10000, 32)
+      ))
+
+    val crossBarParameter = TLCrossBarParameter(
+      TLArbiterPolicy.RoundRobin,
+      masterLinkParameter,
+      slaveLinkParameter
+    )
+
+    val serializedConfig = ujson.Obj(
+      "generator" -> "org.chipsalliance.tilelink.xbar.TLCrossBar",
+      "parameter" -> upickle.default.writeJs(crossBarParameter),
+    ).render(indent = 2)
+    os.write(os.pwd / "config.json", serializedConfig)
+  }
+}