merge the different ExampleTop subclasses into the example package

src/main/scala/example/Configs.scala

@@ -1,14 +1,56 @@
 package example
 
+import chisel3._
 import config.{Parameters, Config}
-import testchipip.WithSerialAdapter
+import diplomacy.LazyModule
 import coreplex.WithRoccExample
 import rocketchip.WithoutTLMonitors
+import testchipip._
 
-class DefaultExampleConfig extends Config(
+class WithExampleTop extends Config((site, here, up) => {
+  case BuildTop => (p: Parameters) =>
+    Module(LazyModule(new ExampleTop()(p)).module)
+})
+
+class WithPWM extends Config((site, here, up) => {
+  case BuildTop => (p: Parameters) =>
+    Module(LazyModule(new ExampleTopWithPWM()(p)).module)
+})
+
+class WithBlockDeviceModel extends Config((site, here, up) => {
+  case BuildTop => (p: Parameters) => {
+    val top = Module(LazyModule(new ExampleTopWithBlockDevice()(p)).module)
+    top.connectBlockDeviceModel()
+    top
+  }
+})
+
+class WithSimBlockDevice extends Config((site, here, up) => {
+  case BuildTop => (p: Parameters) => {
+    val top = Module(LazyModule(new ExampleTopWithBlockDevice()(p)).module)
+    top.connectSimBlockDevice()
+    top
+  }
+})
+
+class BaseExampleConfig extends Config(
   new WithoutTLMonitors ++
   new WithSerialAdapter ++
   new rocketchip.DefaultConfig)
 
+class DefaultExampleConfig extends Config(
+  new WithExampleTop ++ new BaseExampleConfig)
+
 class RoccExampleConfig extends Config(
   new WithRoccExample ++ new DefaultExampleConfig)
+
+class PWMConfig extends Config(new WithPWM ++ new BaseExampleConfig)
+
+class SimBlockDeviceConfig extends Config(
+  new WithBlockDevice ++ new WithSimBlockDevice ++ new BaseExampleConfig)
+
+class BlockDeviceModelConfig extends Config(
+  new WithBlockDevice ++ new WithBlockDeviceModel ++ new BaseExampleConfig)
+
+class WithTwoTrackers extends WithNBlockDeviceTrackers(2)
+class WithFourTrackers extends WithNBlockDeviceTrackers(4)