rocket: change connection between rocketchip and coreplex

* rtc and dtm are now crossed half-and-half on the two sides
* groundtest no longer uses riscv platform traits

src/main/scala/coreplex/BaseCoreplex.scala

@@ -35,7 +35,6 @@ trait HasCoreplexParameters {
   lazy val outerMMIOParams = p.alterPartial({ case TLId => "L2toMMIO" })
   lazy val globalAddrMap = p(rocketchip.GlobalAddrMap)
   lazy val nTiles = p(uncore.devices.NTiles)
-  lazy val nSlaves = p(rocketchip.NCoreplexExtClients)
   lazy val nMemChannels = p(NMemoryChannels)
   lazy val hasSupervisor = p(rocket.UseVM)
   lazy val nTrackersPerBank = p(NTrackersPerBank)
@@ -53,7 +52,7 @@ abstract class BareCoreplexModule[+L <: BareCoreplex, +B <: BareCoreplexBundle[L
 }
 
 trait CoreplexNetwork extends HasCoreplexParameters {
-  this: BareCoreplex =>
+  val module: CoreplexNetworkModule
 
   val l1tol2 = LazyModule(new TLXbar)
   val l1tol2_beatBytes = p(TLKey("L2toMMIO")).dataBitsPerBeat/8
@@ -79,9 +78,7 @@ trait CoreplexNetwork extends HasCoreplexParameters {
 }
 
 trait CoreplexNetworkBundle extends HasCoreplexParameters {
-  this: {
+  val outer: CoreplexNetwork
-    val outer: CoreplexNetwork
-  } =>
 
   implicit val p = outer.p
   val mmio = outer.mmio.bundleOut
@@ -89,12 +86,15 @@ trait CoreplexNetworkBundle extends HasCoreplexParameters {
 }
 
 trait CoreplexNetworkModule extends HasCoreplexParameters {
-    this: BareCoreplexModule[BareCoreplex, BareCoreplexBundle[BareCoreplex]] =>
+  val outer: CoreplexNetwork
+  val io: CoreplexNetworkBundle
+
   implicit val p = outer.p
 }
 
-trait BankedL2CoherenceManagers {
+trait BankedL2CoherenceManagers extends CoreplexNetwork {
-    this: CoreplexNetwork =>
+  val module: BankedL2CoherenceManagersModule
+
   require (isPow2(nBanksPerMemChannel))
   require (isPow2(l1tol2_lineBytes))
 
@@ -116,100 +116,28 @@ trait BankedL2CoherenceManagers {
   }
 }
 
-trait BankedL2CoherenceManagersBundle {
+trait BankedL2CoherenceManagersBundle extends CoreplexNetworkBundle {
-  this: CoreplexNetworkBundle {
+  val outer: BankedL2CoherenceManagers
-    val outer: BankedL2CoherenceManagers
-  } =>
 
   require (nMemChannels <= 1, "Seq in Chisel Bundle needed to support > 1") // !!!
   val mem = outer.mem.map(_.bundleOut).toList.headOption // .headOption should be removed !!!
 }
 
-trait BankedL2CoherenceManagersModule {
+trait BankedL2CoherenceManagersModule extends CoreplexNetworkModule {
-  this: CoreplexNetworkModule {
+  val outer: BankedL2CoherenceManagers
-    val outer: BankedL2CoherenceManagers
+  val io: BankedL2CoherenceManagersBundle
-    val io: BankedL2CoherenceManagersBundle
-  } =>
-}
-
-trait CoreplexRISCVPlatform {
-    this: CoreplexNetwork =>
-
-  val lazyTiles = List.tabulate(p(NTiles)){ i => LazyModule(new RocketTile(i)) }
-  val debug = LazyModule(new TLDebugModule())
-  val plic  = LazyModule(new TLPLIC(hasSupervisor, maxPriorities = 7))
-  val clint = LazyModule(new CoreplexLocalInterrupter)
-  val tileIntNodes = lazyTiles.map { _ => IntInternalOutputNode() } // this should be moved into the Tile...
-
-  debug.node := TLFragmenter(cbus_beatBytes, cbus_lineBytes)(cbus.node)
-  plic.node  := TLFragmenter(cbus_beatBytes, cbus_lineBytes)(cbus.node)
-  clint.node := TLFragmenter(cbus_beatBytes, cbus_lineBytes)(cbus.node)
-
-  plic.intnode := mmioInt
-  tileIntNodes.foreach { _ := plic.intnode }
-}
-
-trait CoreplexRISCVPlatformBundle {
-  this: CoreplexNetworkBundle {
-    val outer: CoreplexRISCVPlatform
-  } =>
-
-  val slave = Vec(nSlaves, new ClientUncachedTileLinkIO()(innerParams)).flip
-  val debug = new DebugBusIO().flip
-  val rtcTick = Bool(INPUT)
-  val resetVector = UInt(INPUT, p(XLen))
-  val success = Bool(OUTPUT) // used for testing
-}
-
-trait CoreplexRISCVPlatformModule {
-  this: CoreplexNetworkModule {
-    val outer: CoreplexNetwork with CoreplexRISCVPlatform
-    val io: CoreplexRISCVPlatformBundle
-  } =>
-
-  val tiles = outer.lazyTiles.map(_.module)
-
-  // Remaining external coreplex signals
-  outer.debug.module.io.db <> io.debug
-  outer.clint.module.io.rtcTick := io.rtcTick
-  io.success := Bool(false) // Coreplex doesn't know when to stop running
-
-  println("\nGenerated Address Map")
-  for (entry <- p(rocketchip.GlobalAddrMap).flatten) {
-    val name = entry.name
-    val start = entry.region.start
-    val end = entry.region.start + entry.region.size - 1
-    val prot = entry.region.attr.prot
-    val protStr = (if ((prot & AddrMapProt.R) > 0) "R" else "") +
-                  (if ((prot & AddrMapProt.W) > 0) "W" else "") +
-                  (if ((prot & AddrMapProt.X) > 0) "X" else "")
-    val cacheable = if (entry.region.attr.cacheable) " [C]" else ""
-    println(f"\t$name%s $start%x - $end%x, $protStr$cacheable")
-  }
-
-  // Create and export the ConfigString
-  val managers = outer.l1tol2.node.edgesIn(0).manager.managers
-  val configString = rocketchip.GenerateConfigString(p, outer.clint, outer.plic, managers)
-  // Allow something else to have override the config string
-  if (!ConfigStringOutput.contents.isDefined) {
-    ConfigStringOutput.contents = Some(configString)
-  }
-  println(s"\nGenerated Configuration String\n${ConfigStringOutput.contents.get}")
 }
 
 abstract class BaseCoreplex(implicit p: Parameters) extends BareCoreplex
     with CoreplexNetwork
-    with BankedL2CoherenceManagers
+    with BankedL2CoherenceManagers {
-    with CoreplexRISCVPlatform {
   override lazy val module = new BaseCoreplexModule(this, () => new BaseCoreplexBundle(this))
 }
 
 class BaseCoreplexBundle[+L <: BaseCoreplex](_outer: L) extends BareCoreplexBundle(_outer)
     with CoreplexNetworkBundle
     with BankedL2CoherenceManagersBundle
-    with CoreplexRISCVPlatformBundle
 
 class BaseCoreplexModule[+L <: BaseCoreplex, +B <: BaseCoreplexBundle[L]](_outer: L, _io: () => B) extends BareCoreplexModule(_outer, _io)
     with CoreplexNetworkModule
     with BankedL2CoherenceManagersModule
-    with CoreplexRISCVPlatformModule

src/main/scala/coreplex/Configs.scala

@@ -13,7 +13,7 @@ import uncore.converters._
 import rocket._
 import util._
 import util.ConfigUtils._
-import rocketchip.{GlobalAddrMap, NCoreplexExtClients}
+import rocketchip.{GlobalAddrMap}
 import cde.{Parameters, Config, Dump, Knob, CDEMatchError}
 
 class BaseCoreplexConfig extends Config (
@@ -104,7 +104,7 @@ class BaseCoreplexConfig extends Config (
             else new MESICoherence(site(L2DirectoryRepresentation))),
           nManagers = site(NBanksPerMemoryChannel)*site(NMemoryChannels) + 1 /* MMIO */,
           nCachingClients = 1,
-          nCachelessClients = site(NCoreplexExtClients) + 1,
+          nCachelessClients = 1,
           maxClientXacts = max_int(
               // L1 cache
               site(DCacheKey).nMSHRs + 1 /* IOMSHR */,

src/main/scala/coreplex/Coreplex.scala

@@ -10,8 +10,7 @@ import uncore.util._
 import util._
 import rocket._
 
-trait BroadcastL2 {
+trait BroadcastL2 extends BankedL2CoherenceManagers {
-    this: CoreplexNetwork =>
   def l2ManagerFactory() = {
     val bh = LazyModule(new TLBroadcast(l1tol2_lineBytes, nTrackersPerBank))
     (bh.node, bh.node)
@@ -20,45 +19,23 @@ trait BroadcastL2 {
 
 /////
 
-trait DirectConnection {
-    this: CoreplexNetwork with CoreplexRISCVPlatform =>
-
-  lazyTiles foreach { t =>
-    t.slaveNode.foreach { _ := cbus.node }
-    l1tol2.node := TLBuffer(1,1,2,2,0)(TLHintHandler()(t.cachedOut))
-    l1tol2.node := TLBuffer(1,0,0,2,0)(TLHintHandler()(t.uncachedOut))
-  }
-}
-
-trait DirectConnectionModule {
-  this: CoreplexNetworkModule with CoreplexRISCVPlatformModule {
-    val outer: CoreplexNetwork with CoreplexRISCVPlatform
-    val io: CoreplexRISCVPlatformBundle
-  } =>
-
-  // connect coreplex-internal interrupts to tiles
-  tiles.zipWithIndex.foreach { case (tile, i) =>
-    tile.io.hartid := UInt(i)
-    tile.io.resetVector := io.resetVector
-    tile.io.interrupts := outer.clint.module.io.tiles(i)
-    tile.io.interrupts.debug := outer.debug.module.io.debugInterrupts(i)
-    tile.io.interrupts.meip := outer.tileIntNodes(i).bundleOut(0)(0)
-    tile.io.interrupts.seip.foreach(_ := outer.tileIntNodes(i).bundleOut(0)(1))
-  }
-}
-
 class DefaultCoreplex(implicit p: Parameters) extends BaseCoreplex
     with BroadcastL2
-    with DirectConnection {
+    with CoreplexRISCVPlatform
+    with RocketPlex {
   override lazy val module = new DefaultCoreplexModule(this, () => new DefaultCoreplexBundle(this))
 }
 
 class DefaultCoreplexBundle[+L <: DefaultCoreplex](_outer: L) extends BaseCoreplexBundle(_outer)
+    with CoreplexRISCVPlatformBundle
+    with RocketPlexBundle
 
 class DefaultCoreplexModule[+L <: DefaultCoreplex, +B <: DefaultCoreplexBundle[L]](_outer: L, _io: () => B) extends BaseCoreplexModule(_outer, _io)
-    with DirectConnectionModule
+    with CoreplexRISCVPlatformModule
+    with RocketPlexModule
 
 /////
+/*
 
 trait AsyncConnection {
     this: CoreplexNetwork with CoreplexRISCVPlatform =>
@@ -149,3 +126,4 @@ class MultiClockCoreplexBundle[+L <: MultiClockCoreplex](_outer: L) extends Base
 
 class MultiClockCoreplexModule[+L <: MultiClockCoreplex, +B <: MultiClockCoreplexBundle[L]](_outer: L, _io: () => B) extends BaseCoreplexModule(_outer, _io)
     with AsyncConnectionModule
+*/

src/main/scala/coreplex/RISCVPlatform.scala

@@ -0,0 +1,73 @@
+package coreplex
+
+import Chisel._
+import cde.{Parameters, Field}
+import junctions._
+import diplomacy._
+import uncore.tilelink._
+import uncore.tilelink2._
+import uncore.coherence._
+import uncore.agents._
+import uncore.devices._
+import uncore.util._
+import uncore.converters._
+import rocket._
+import util._
+
+trait CoreplexRISCVPlatform extends CoreplexNetwork {
+  val module: CoreplexRISCVPlatformModule
+
+  val debug = LazyModule(new TLDebugModule())
+  val plic  = LazyModule(new TLPLIC(hasSupervisor, maxPriorities = 7))
+  val clint = LazyModule(new CoreplexLocalInterrupter)
+
+  debug.node := TLFragmenter(cbus_beatBytes, cbus_lineBytes)(cbus.node)
+  plic.node  := TLFragmenter(cbus_beatBytes, cbus_lineBytes)(cbus.node)
+  clint.node := TLFragmenter(cbus_beatBytes, cbus_lineBytes)(cbus.node)
+
+  plic.intnode := mmioInt
+
+}
+
+trait CoreplexRISCVPlatformBundle extends CoreplexNetworkBundle {
+  val outer: CoreplexRISCVPlatform
+
+  val debug = new AsyncDebugBusIO().flip
+  val rtcToggle = Bool(INPUT)
+  val resetVector = UInt(INPUT, p(XLen))
+}
+
+trait CoreplexRISCVPlatformModule extends CoreplexNetworkModule {
+  val outer: CoreplexRISCVPlatform
+  val io: CoreplexRISCVPlatformBundle
+
+  // Synchronize the debug bus into the coreplex
+  outer.debug.module.io.db <> FromAsyncDebugBus(io.debug)
+
+  // Synchronize the rtc into the coreplex
+  val rtcSync = ShiftRegister(io.rtcToggle, 3)
+  val rtcLast = Reg(init = Bool(false), next=rtcSync)
+  outer.clint.module.io.rtcTick := Reg(init = Bool(false), next=(rtcSync & (~rtcLast)))
+
+  println("\nGenerated Address Map")
+  for (entry <- p(rocketchip.GlobalAddrMap).flatten) {
+    val name = entry.name
+    val start = entry.region.start
+    val end = entry.region.start + entry.region.size - 1
+    val prot = entry.region.attr.prot
+    val protStr = (if ((prot & AddrMapProt.R) > 0) "R" else "") +
+                  (if ((prot & AddrMapProt.W) > 0) "W" else "") +
+                  (if ((prot & AddrMapProt.X) > 0) "X" else "")
+    val cacheable = if (entry.region.attr.cacheable) " [C]" else ""
+    println(f"\t$name%s $start%x - $end%x, $protStr$cacheable")
+  }
+
+  // Create and export the ConfigString
+  val managers = outer.l1tol2.node.edgesIn(0).manager.managers
+  val configString = rocketchip.GenerateConfigString(p, outer.clint, outer.plic, managers)
+  // Allow something else to have override the config string
+  if (!ConfigStringOutput.contents.isDefined) {
+    ConfigStringOutput.contents = Some(configString)
+  }
+  println(s"\nGenerated Configuration String\n${ConfigStringOutput.contents.get}")
+}

src/main/scala/coreplex/RocketPlex.scala

@@ -0,0 +1,41 @@
+package coreplex
+
+import Chisel._
+import cde.{Parameters, Field}
+import diplomacy._
+import uncore.tilelink2._
+import uncore.coherence._
+import rocket._
+import uncore.devices.NTiles
+
+trait RocketPlex extends CoreplexRISCVPlatform {
+  val module: RocketPlexModule
+
+  val rocketTiles = List.tabulate(p(NTiles)) { i => LazyModule(new RocketTile(i)) }
+  val tileIntNodes = rocketTiles.map { _ => IntInternalOutputNode() }
+
+  tileIntNodes.foreach { _ := plic.intnode }
+  rocketTiles.foreach { r =>
+    r.slaveNode.foreach { _ := cbus.node }
+    l1tol2.node := r.cachedOut
+    l1tol2.node := r.uncachedOut
+  }
+}
+
+trait RocketPlexBundle extends CoreplexRISCVPlatformBundle {
+  val outer: CoreplexRISCVPlatform
+}
+
+trait RocketPlexModule extends CoreplexRISCVPlatformModule {
+  val outer: RocketPlex
+  val io: RocketPlexBundle
+
+  outer.rocketTiles.map(_.module).zipWithIndex.foreach { case (tile, i) =>
+    tile.io.hartid := UInt(i)
+    tile.io.resetVector := io.resetVector
+    tile.io.interrupts := outer.clint.module.io.tiles(i)
+    tile.io.interrupts.debug := outer.debug.module.io.debugInterrupts(i)
+    tile.io.interrupts.meip := outer.tileIntNodes(i).bundleOut(0)(0)
+    tile.io.interrupts.seip.foreach(_ := outer.tileIntNodes(i).bundleOut(0)(1))
+  }
+}

src/main/scala/groundtest/Configs.scala

@@ -81,7 +81,7 @@ class WithGroundTest extends Config(
           else new MESICoherence(site(L2DirectoryRepresentation))),
         nManagers = site(NBanksPerMemoryChannel)*site(NMemoryChannels) + 1,
         nCachingClients = 1,
-        nCachelessClients = site(NCoreplexExtClients) + 1,
+        nCachelessClients = 1,
         maxClientXacts = ((site(DCacheKey).nMSHRs + 1) +:
                            site(GroundTestKey).map(_.maxXacts))
                              .reduce(max(_, _)),

src/main/scala/groundtest/Coreplex.scala

@@ -9,9 +9,8 @@ import rocket.TileId
 import uncore.tilelink.TLId
 
 class GroundTestCoreplex(implicit p: Parameters) extends BaseCoreplex
-    with BroadcastL2
+    with BroadcastL2 {
-    with DirectConnection {
+  val tiles = List.tabulate(p(NTiles)) { i =>
-  val tiles = (0 until p(NTiles)).map { i =>
     LazyModule(new GroundTestTile()(p.alterPartial({
       case TLId => "L1toL2"
       case TileId => i
@@ -21,8 +20,10 @@ class GroundTestCoreplex(implicit p: Parameters) extends BaseCoreplex
 }
 
 class GroundTestCoreplexBundle[+L <: GroundTestCoreplex](_outer: L) extends BaseCoreplexBundle(_outer)
-
+{
-class GroundTestCoreplexModule[+L <: GroundTestCoreplex, +B <: GroundTestCoreplexBundle[L]](_outer: L, _io: () => B) extends BaseCoreplexModule(_outer, _io)
+  val success = Bool(OUTPUT)
-    with DirectConnectionModule {
+}
-  io.success := outer.tiles.flatMap(_.module.io.elements get "success").map(_.asInstanceOf[Bool]).reduce(_&&_)
+
+class GroundTestCoreplexModule[+L <: GroundTestCoreplex, +B <: GroundTestCoreplexBundle[L]](_outer: L, _io: () => B) extends BaseCoreplexModule(_outer, _io) {
+  io.success := outer.tiles.map(_.module.io.success).reduce(_&&_)
 }

src/main/scala/rocket/tile.scala

@@ -43,7 +43,7 @@ class RocketTile(tileId: Int)(implicit p: Parameters) extends LazyModule {
   val cachedOut = TLOutputNode()
   val uncachedOut = TLOutputNode()
   cachedOut := dcache.node
-  uncachedOut := ucLegacy.node
+  uncachedOut := TLHintHandler()(ucLegacy.node)
   val masterNodes = List(cachedOut, uncachedOut)
   
   (slaveNode zip scratch) foreach { case (node, lm) => lm.node := TLFragmenter(p(XLen)/8, p(CacheBlockBytes))(node) }

src/main/scala/rocketchip/BaseTop.scala

@@ -15,16 +15,13 @@ import coreplex._
 
 // the following parameters will be refactored properly with TL2
 case object GlobalAddrMap extends Field[AddrMap]
-case object NCoreplexExtClients extends Field[Int]
 /** Enable or disable monitoring of Diplomatic buses */
 case object TLEmitMonitors extends Field[Bool]
 
-abstract class BareTop[+C <: BaseCoreplex](_coreplex: Parameters => C)(implicit val q: Parameters) extends LazyModule {
+abstract class BareTop[+C <: BaseCoreplex](_coreplex: Parameters => C)(implicit val p: Parameters) extends LazyModule {
   // Fill in the TL1 legacy parameters; remove these once rocket/groundtest/unittest are TL2
-  val pBusMasters = new RangeManager
+  lazy val legacyAddrMap = GenerateGlobalAddrMap(p, coreplex.l1tol2.node.edgesIn(0).manager.managers)
-  lazy val legacyAddrMap = GenerateGlobalAddrMap(q, coreplex.l1tol2.node.edgesIn(0).manager.managers)
+  val coreplex : C = LazyModule(_coreplex(p.alterPartial {
-  val coreplex : C = LazyModule(_coreplex(q.alterPartial {
-    case NCoreplexExtClients => pBusMasters.sum
     case GlobalAddrMap => legacyAddrMap
   }))
 
@@ -42,8 +39,8 @@ abstract class BareTopModule[+L <: BareTop[BaseCoreplex], +B <: BareTopBundle[L]
 
 /** Base Top with no Periphery */
 trait TopNetwork extends HasPeripheryParameters {
-  this: BareTop[BaseCoreplex] =>
+  val module: TopNetworkModule
-  implicit val p = q
+
   TLImp.emitMonitors = p(TLEmitMonitors)
 
   // Add a SoC and peripheral bus
@@ -60,26 +57,14 @@ trait TopNetwork extends HasPeripheryParameters {
 }
 
 trait TopNetworkBundle extends HasPeripheryParameters {
-  this: BareTopBundle[BareTop[BaseCoreplex]] =>
+  val outer: TopNetwork
-  implicit val p = outer.q
+  implicit val p = outer.p
-  val success = Bool(OUTPUT)
 }
 
 trait TopNetworkModule extends HasPeripheryParameters {
-  this: {
+  val io: TopNetworkBundle
-    val outer: BareTop[BaseCoreplex] with TopNetwork
+  val outer: TopNetwork
-    val io: TopNetworkBundle
-  } =>
   implicit val p = outer.p
-
-  val coreplexSlave: Vec[ClientUncachedTileLinkIO] = Wire(outer.coreplex.module.io.slave)
-  val coreplexDebug: DebugBusIO                    = Wire(outer.coreplex.module.io.debug)
-  val coreplexRtc  : Bool                          = Wire(outer.coreplex.module.io.rtcTick)
-
-  io.success := outer.coreplex.module.io.success
-
-  outer.coreplex.module.io.rtcTick := coreplexRtc
-  coreplexRtc := Counter(p(rocketchip.RTCPeriod)).inc()
 }
 
 /** Base Top with no Periphery */
@@ -94,20 +79,11 @@ class BaseTopBundle[+L <: BaseTop[BaseCoreplex]](_outer: L) extends BareTopBundl
 class BaseTopModule[+L <: BaseTop[BaseCoreplex], +B <: BaseTopBundle[L]](_outer: L, _io: () => B) extends BareTopModule(_outer, _io)
     with TopNetworkModule
 
-trait DirectConnection {
+trait DirectConnection extends TopNetwork {
-  this: BareTop[BaseCoreplex] with TopNetwork =>
+  val coreplex: BaseCoreplex
 
   socBus.node := coreplex.mmio
   coreplex.mmioInt := intBus.intnode
 
   coreplexMem = coreplex.mem
 }
-
-trait DirectConnectionModule {
-  this: TopNetworkModule {
-    val outer: BaseTop[BaseCoreplex]
-  } =>
-
-  outer.coreplex.module.io.slave <> coreplexSlave
-  outer.coreplex.module.io.debug <> coreplexDebug
-}

src/main/scala/rocketchip/Configs.scala

@@ -62,8 +62,6 @@ class BasePlatformConfig extends Config(
         case TMemoryChannels => BusType.AXI
         case ExtMemSize => Dump("MEM_SIZE", 0x10000000L)
         case RTCPeriod => 100 // gives 10 MHz RTC assuming 1 GHz uncore clock
-        case BuildExampleTop =>
-          (p: Parameters) => LazyModule(new ExampleTop(new DefaultCoreplex()(_))(p))
         case SimMemLatency => 0
         case _ => throw new CDEMatchError
       }

src/main/scala/rocketchip/DebugTransport.scala

@@ -1,7 +1,7 @@
 package rocketchip
 
 import Chisel._
-import uncore.devices.{DebugBusIO, AsyncDebugBusCrossing, DebugBusReq, DebugBusResp, DMKey}
+import uncore.devices._
 import junctions._
 import util._
 import cde.{Parameters, Field}
@@ -45,13 +45,13 @@ class JtagDTMWithSync(depth: Int = 1, sync: Int = 3)(implicit val p: Parameters)
 
   val io = new Bundle {
 
-    val jtag = new JTAGIO(true).flip()
+    val jtag = new JTAGIO(true).flip
-    val debug = new DebugBusIO()(p)
+    val debug = new AsyncDebugBusIO
 
   }
 
-  val req_width = io.debug.req.bits.getWidth
+  val req_width = io.debug.req.mem(0).getWidth
-  val resp_width = io.debug.resp.bits.getWidth
+  val resp_width = io.debug.resp.mem(0).getWidth
 
   val jtag_dtm = Module (new DebugTransportModuleJtag(req_width, resp_width))
 
@@ -62,7 +62,8 @@ class JtagDTMWithSync(depth: Int = 1, sync: Int = 3)(implicit val p: Parameters)
 
   val io_debug_bus = Wire (new DebugBusIO)
 
-  io.debug <> AsyncDebugBusCrossing(io.jtag.TCK, io.jtag.TRST, io_debug_bus, clock, reset, depth, sync)
+  io.debug.req <> ToAsyncBundle(io_debug_bus.req)
+  io_debug_bus.resp <> FromAsyncBundle(io.debug.resp)
 
   // Translate from straight 'bits' interface of the blackboxes
   // into the Resp/Req data structures.

src/main/scala/rocketchip/ExampleTop.scala

@@ -12,31 +12,40 @@ import rocketchip._
 class ExampleTop[+C <: BaseCoreplex](_coreplex: Parameters => C)(implicit p: Parameters) extends BaseTop(_coreplex)
     with DirectConnection
     with PeripheryBootROM
-    with PeripheryDebug
     with PeripheryExtInterrupts
     with PeripheryMasterAXI4Mem
-    with PeripheryMasterAXI4MMIO
+    with PeripheryMasterAXI4MMIO {
-    with PeripherySlave {
   override lazy val module = new ExampleTopModule(this, () => new ExampleTopBundle(this))
 }
 
 class ExampleTopBundle[+L <: ExampleTop[BaseCoreplex]](_outer: L) extends BaseTopBundle(_outer)
     with PeripheryBootROMBundle
-    with PeripheryDebugBundle
     with PeripheryExtInterruptsBundle
     with PeripheryMasterAXI4MemBundle
     with PeripheryMasterAXI4MMIOBundle
-    with PeripherySlaveBundle
 
 class ExampleTopModule[+L <: ExampleTop[BaseCoreplex], +B <: ExampleTopBundle[L]](_outer: L, _io: () => B) extends BaseTopModule(_outer, _io)
-    with DirectConnectionModule
     with PeripheryBootROMModule
-    with PeripheryDebugModule
     with PeripheryExtInterruptsModule
     with PeripheryMasterAXI4MemModule
     with PeripheryMasterAXI4MMIOModule
-    with PeripherySlaveModule
+
-    with HardwiredResetVector
+class ExampleRocketTop[+C <: DefaultCoreplex](_coreplex: Parameters => C)(implicit p: Parameters) extends ExampleTop(_coreplex)
+    with PeripheryDTM
+    with PeripheryCounter
+    with HardwiredResetVector {
+  override lazy val module = new ExampleRocketTopModule(this, () => new ExampleRocketTopBundle(this))
+}
+
+class ExampleRocketTopBundle[+L <: ExampleRocketTop[DefaultCoreplex]](_outer: L) extends ExampleTopBundle(_outer)
+    with PeripheryDTMBundle
+    with PeripheryCounterBundle
+    with HardwiredResetVectorBundle
+
+class ExampleRocketTopModule[+L <: ExampleRocketTop[DefaultCoreplex], +B <: ExampleRocketTopBundle[L]](_outer: L, _io: () => B) extends ExampleTopModule(_outer, _io)
+    with PeripheryDTMModule
+    with PeripheryCounterModule
+    with HardwiredResetVectorModule
 
 /** Example Top with TestRAM */
 class ExampleTopWithTestRAM[+C <: BaseCoreplex](_coreplex: Parameters => C)(implicit p: Parameters) extends ExampleTop(_coreplex)

src/main/scala/rocketchip/Periphery.scala

@@ -92,41 +92,6 @@ trait HasPeripheryParameters {
 
 /////
 
-trait PeripheryDebug {
-  this: TopNetwork =>
-}
-
-trait PeripheryDebugBundle {
-  this: TopNetworkBundle {
-    val outer: PeripheryDebug
-  } =>
-  val debug_clk = (p(AsyncDebugBus) && !p(IncludeJtagDTM)).option(Clock(INPUT))
-  val debug_rst = (p(AsyncDebugBus) && !p(IncludeJtagDTM)).option(Bool(INPUT))
-  val debug = (!p(IncludeJtagDTM)).option(new DebugBusIO()(p).flip)
-  val jtag = p(IncludeJtagDTM).option(new JTAGIO(true).flip)
-}
-
-trait PeripheryDebugModule {
-  this: TopNetworkModule {
-    val outer: PeripheryDebug
-    val io: PeripheryDebugBundle
-  } =>
-
-  if (p(IncludeJtagDTM)) {
-    // JtagDTMWithSync is a wrapper which
-    // handles the synchronization as well.
-    val dtm = Module (new JtagDTMWithSync()(p))
-    dtm.io.jtag <> io.jtag.get
-    coreplexDebug <> dtm.io.debug
-  } else {
-    coreplexDebug <>
-      (if (p(AsyncDebugBus)) AsyncDebugBusFrom(io.debug_clk.get, io.debug_rst.get, io.debug.get)
-      else io.debug.get)
-  }
-}
-
-/////
-
 trait PeripheryExtInterrupts {
   this: TopNetwork =>
 
@@ -238,48 +203,6 @@ trait PeripheryMasterAXI4MMIOModule {
 
 /////
 
-trait PeripherySlave {
-  this: TopNetwork {
-    val pBusMasters: RangeManager
-  } =>
-
-  if (p(NExtBusAXIChannels) > 0) pBusMasters.add("ext", 1) // NExtBusAXIChannels are arbitrated into one TL port
-}
-
-trait PeripherySlaveBundle {
-  this: TopNetworkBundle {
-    val outer: PeripherySlave
-  } =>
-  val bus_clk = p(AsyncBusChannels).option(Vec(p(NExtBusAXIChannels), Clock(INPUT)))
-  val bus_rst = p(AsyncBusChannels).option(Vec(p(NExtBusAXIChannels), Bool (INPUT)))
-  val bus_axi = Vec(p(NExtBusAXIChannels), new NastiIO).flip
-}
-
-trait PeripherySlaveModule {
-  this: TopNetworkModule {
-    val outer: PeripherySlave { val pBusMasters: RangeManager }
-    val io: PeripherySlaveBundle
-  } =>
-
-  if (p(NExtBusAXIChannels) > 0) {
-    val arb = Module(new NastiArbiter(p(NExtBusAXIChannels)))
-    ((io.bus_axi zip arb.io.master) zipWithIndex) foreach { case ((bus, port), idx) =>
-      port <> (
-        if (!p(AsyncBusChannels)) bus
-        else AsyncNastiFrom(io.bus_clk.get(idx), io.bus_rst.get(idx), bus)
-      )
-    }
-    val conv = Module(new TileLinkIONastiIOConverter()(edgeSlaveParams))
-    conv.io.nasti <> arb.io.slave
-
-    val (r_start, r_end) = outer.pBusMasters.range("ext")
-    require(r_end - r_start == 1, "RangeManager should return 1 slot")
-    TileLinkWidthAdapter(coreplexSlave(r_start), conv.io.tl)
-  }
-}
-
-/////
-
 trait PeripheryBootROM {
   this: TopNetwork =>
 
@@ -344,12 +267,3 @@ trait PeripheryTestBusMasterModule {
     val io: PeripheryTestBusMasterBundle
   } =>
 }
-
-/////
-
-trait HardwiredResetVector {
-  this: TopNetworkModule {
-    val outer: BaseTop[BaseCoreplex]
-  } =>
-  outer.coreplex.module.io.resetVector := UInt(0x1000) // boot ROM
-}

src/main/scala/rocketchip/RISCVPlatform.scala

@@ -0,0 +1,92 @@
+// See LICENSE for license details.
+
+package rocketchip
+
+import Chisel._
+import cde.{Parameters, Field, Dump}
+import diplomacy._
+import uncore.tilelink2._
+import uncore.devices._
+import util._
+import junctions.JTAGIO
+import coreplex._
+
+trait PeripheryJTAG extends TopNetwork {
+  val module: PeripheryJTAGModule
+  val coreplex: CoreplexRISCVPlatform
+}
+
+trait PeripheryJTAGBundle extends TopNetworkBundle {
+  val outer: PeripheryJTAG
+
+  val jtag = new JTAGIO(true).flip
+}
+
+trait PeripheryJTAGModule extends TopNetworkModule {
+  val outer: PeripheryJTAG
+  val io: PeripheryJTAGBundle
+
+  val dtm = Module (new JtagDTMWithSync)
+  dtm.io.jtag <> io.jtag
+  outer.coreplex.module.io.debug <> dtm.io.debug
+
+  dtm.clock := io.jtag.TCK
+  dtm.reset := io.jtag.TRST
+}
+
+trait PeripheryDTM extends TopNetwork {
+  val module: PeripheryDTMModule
+  val coreplex: CoreplexRISCVPlatform
+}
+
+trait PeripheryDTMBundle extends TopNetworkBundle {
+  val outer: PeripheryDTM
+
+  val debug = new DebugBusIO().flip
+}
+
+trait PeripheryDTMModule extends TopNetworkModule {
+  val outer: PeripheryDTM
+  val io: PeripheryDTMBundle
+
+  outer.coreplex.module.io.debug <> ToAsyncDebugBus(io.debug)
+}
+
+trait PeripheryCounter extends TopNetwork {
+  val module: PeripheryCounterModule
+  val coreplex: CoreplexRISCVPlatform
+}
+
+trait PeripheryCounterBundle extends TopNetworkBundle {
+  val outer: PeripheryCounter
+}
+
+trait PeripheryCounterModule extends TopNetworkModule {
+  val outer: PeripheryCounter
+  val io: PeripheryCounterBundle
+  
+  {
+    val period = p(rocketchip.RTCPeriod)
+    val rtcCounter = RegInit(UInt(0, width = log2Up(period)))
+    val rtcWrap = rtcCounter === UInt(period-1)
+    rtcCounter := Mux(rtcWrap, UInt(0), rtcCounter + UInt(1))
+
+    outer.coreplex.module.io.rtcToggle := rtcCounter(log2Up(period)-1)
+  }
+}
+
+trait HardwiredResetVector extends TopNetwork {
+  val module: HardwiredResetVectorModule
+  val coreplex: CoreplexRISCVPlatform
+}
+
+trait HardwiredResetVectorBundle extends TopNetworkBundle {
+  val outer: HardwiredResetVector
+}
+
+trait HardwiredResetVectorModule extends TopNetworkModule {
+  val outer: HardwiredResetVector
+  val io: HardwiredResetVectorBundle
+
+  outer.coreplex.module.io.resetVector := UInt(0x1000) // boot ROM
+}

src/main/scala/rocketchip/TestHarness.scala

@@ -5,6 +5,8 @@ package rocketchip
 import Chisel._
 import cde.{Parameters, Field}
 import junctions._
+import diplomacy._
+import coreplex._
 import junctions.NastiConstants._
 import util.LatencyPipe
 
@@ -15,12 +17,8 @@ class TestHarness(q: Parameters) extends Module {
   val io = new Bundle {
     val success = Bool(OUTPUT)
   }
-  val dut = Module(q(BuildExampleTop)(q).module)
+  implicit val p = q
-  implicit val p = dut.p
+  val dut = Module(LazyModule(new ExampleRocketTop(new DefaultCoreplex()(_))).module)
-
-  // This test harness isn't especially flexible yet
-  require(dut.io.bus_clk.isEmpty)
-  require(dut.io.bus_rst.isEmpty)
 
   for (int <- dut.io.interrupts(0))
     int := Bool(false)
@@ -38,26 +36,7 @@ class TestHarness(q: Parameters) extends Module {
     }
   }
 
-  if (!p(IncludeJtagDTM)) {
+  val dtm = Module(new SimDTM).connect(clock, reset, dut.io.debug, io.success)
-    // Todo: enable the usage of different clocks
-    // to test the synchronizer more aggressively.
-    val dtm_clock = clock
-    val dtm_reset = reset
-    if (dut.io.debug_clk.isDefined) dut.io.debug_clk.get := dtm_clock
-    if (dut.io.debug_rst.isDefined) dut.io.debug_rst.get := dtm_reset
-    val dtm = Module(new SimDTM).connect(dtm_clock, dtm_reset, dut.io.debug.get,
-      dut.io.success, io.success)
-  } else {
-    val jtag = Module(new JTAGVPI).connect(dut.io.jtag.get, reset, io.success)
-  }
-
-  for (bus_axi <- dut.io.bus_axi) {
-    bus_axi.ar.valid := Bool(false)
-    bus_axi.aw.valid := Bool(false)
-    bus_axi.w.valid  := Bool(false)
-    bus_axi.r.ready  := Bool(false)
-    bus_axi.b.ready  := Bool(false)
-  }
 
   for (mmio_axi <- dut.io.mmio_axi) {
     val slave = Module(new NastiErrorSlave)
@@ -128,13 +107,12 @@ class SimDTM(implicit p: Parameters) extends BlackBox {
     val exit = UInt(OUTPUT, 32)
   }
 
-  def connect(tbclk: Clock, tbreset: Bool, dutio: uncore.devices.DebugBusIO,
+  def connect(tbclk: Clock, tbreset: Bool, dutio: uncore.devices.DebugBusIO, tbsuccess: Bool) = {
-      dutsuccess: Bool, tbsuccess: Bool) = {
     io.clk := tbclk
     io.reset := tbreset
     dutio <> io.debug
 
-    tbsuccess := dutsuccess || io.exit === UInt(1)
+    tbsuccess := io.exit === UInt(1)
     when (io.exit >= UInt(2)) {
       printf("*** FAILED *** (exit code = %d)\n", io.exit >> UInt(1))
       stop(1)

src/main/scala/uncore/devices/Debug.scala

@@ -306,6 +306,31 @@ class DebugBusIO(implicit val p: cde.Parameters) extends ParameterizedBundle()(p
   val resp = new DecoupledIO(new DebugBusResp).flip()
 }
 
+class AsyncDebugBusIO(implicit val p: cde.Parameters) extends ParameterizedBundle()(p) {
+  val req  = new AsyncBundle(1, new DebugBusReq(p(DMKey).nDebugBusAddrSize))
+  val resp = new AsyncBundle(1, new DebugBusResp).flip
+}
+
+object FromAsyncDebugBus
+{
+  def apply(x: AsyncDebugBusIO) = {
+    val out = Wire(new DebugBusIO()(x.p))
+    out.req <> FromAsyncBundle(x.req)
+    x.resp <> ToAsyncBundle(out.resp, 1)
+    out
+  }
+}
+
+object ToAsyncDebugBus
+{
+  def apply(x: DebugBusIO) = {
+    val out = Wire(new AsyncDebugBusIO()(x.p))
+    out.req <> ToAsyncBundle(x.req, 1)
+    x.resp <> FromAsyncBundle(out.resp)
+    out
+  }
+}
+
 trait HasDebugModuleParameters {
   val params : Parameters
   implicit val p = params

src/main/scala/uncore/tilelink2/Bundles.scala

@@ -5,7 +5,7 @@ package uncore.tilelink2
 import Chisel._
 import chisel3.util.{ReadyValidIO}
 import diplomacy._
-import util.{AsyncQueueSource, AsyncQueueSink, GenericParameterizedBundle}
+import util._
 
 abstract class TLBundleBase(params: TLBundleParameters) extends GenericParameterizedBundle(params)
 
@@ -241,58 +241,6 @@ object TLBundleSnoop
   }
 }
 
-final class AsyncBundle[T <: Data](val depth: Int, gen: T) extends Bundle
-{
-  require (isPow2(depth))
-  val mem  = Vec(depth, gen)
-  val ridx = UInt(width = log2Up(depth)+1).flip
-  val widx = UInt(width = log2Up(depth)+1)
-  val ridx_valid = Bool().flip
-  val widx_valid = Bool()
-  val source_reset_n = Bool()
-  val sink_reset_n = Bool().flip
-
-  override def cloneType: this.type = new AsyncBundle(depth, gen).asInstanceOf[this.type]
-}
-
-object FromAsyncBundle
-{
-  def apply[T <: Data](x: AsyncBundle[T], sync: Int = 3): DecoupledIO[T] = {
-    val sink = Module(new AsyncQueueSink(x.mem(0), x.depth, sync))
-    x.ridx := sink.io.ridx
-    x.ridx_valid := sink.io.ridx_valid
-    sink.io.widx := x.widx
-    sink.io.widx_valid := x.widx_valid
-    sink.io.mem  := x.mem
-    sink.io.source_reset_n := x.source_reset_n
-    x.sink_reset_n := !sink.reset
-    val out = Wire(Decoupled(x.mem(0)))
-    out.valid := sink.io.deq.valid
-    out.bits := sink.io.deq.bits
-    sink.io.deq.ready := out.ready
-    out
-  }
-}
-
-object ToAsyncBundle
-{
-  def apply[T <: Data](x: ReadyValidIO[T], depth: Int = 8, sync: Int = 3): AsyncBundle[T] = {
-    val source = Module(new AsyncQueueSource(x.bits, depth, sync))
-    source.io.enq.valid := x.valid
-    source.io.enq.bits := x.bits
-    x.ready := source.io.enq.ready
-    val out = Wire(new AsyncBundle(depth, x.bits))
-    source.io.ridx := out.ridx
-    source.io.ridx_valid := out.ridx_valid
-    out.mem := source.io.mem
-    out.widx := source.io.widx
-    out.widx_valid := source.io.widx_valid
-    source.io.sink_reset_n := out.sink_reset_n
-    out.source_reset_n := !source.reset
-    out
-  }
-}
-
 class TLAsyncBundleBase(params: TLAsyncBundleParameters) extends GenericParameterizedBundle(params)
 
 class TLAsyncBundle(params: TLAsyncBundleParameters) extends TLAsyncBundleBase(params)

src/main/scala/uncore/tilelink2/Isolation.scala

@@ -5,6 +5,7 @@ package uncore.tilelink2
 import Chisel._
 import chisel3.internal.sourceinfo.SourceInfo
 import diplomacy._
+import util.AsyncBundle
 
 // READ the comments in the TLIsolation object before you instantiate this module
 class TLIsolation(fOut: (Bool, UInt) => UInt, fIn: (Bool, UInt) => UInt) extends LazyModule

src/main/scala/unittest/Configs.scala

@@ -20,7 +20,6 @@ class JunctionsUnitTestConfig extends Config(new WithJunctionsUnitTests ++ new B
 
 class WithUncoreUnitTests extends Config(
   (pname, site, here) => pname match {
-    case rocketchip.NCoreplexExtClients => 0
     case uncore.tilelink.TLId => "L1toL2"
     case UnitTests => (p: Parameters) => Seq(
       Module(new uncore.devices.ROMSlaveTest()(p)),

src/main/scala/util/AsyncBundle.scala

@@ -0,0 +1,59 @@
+// See LICENSE for license details.
+
+package util
+
+import Chisel._
+import chisel3.util.{ReadyValidIO}
+
+final class AsyncBundle[T <: Data](val depth: Int, gen: T) extends Bundle
+{
+  require (isPow2(depth))
+  val mem  = Vec(depth, gen)
+  val ridx = UInt(width = log2Up(depth)+1).flip
+  val widx = UInt(width = log2Up(depth)+1)
+  val ridx_valid = Bool().flip
+  val widx_valid = Bool()
+  val source_reset_n = Bool()
+  val sink_reset_n = Bool().flip
+
+  override def cloneType: this.type = new AsyncBundle(depth, gen).asInstanceOf[this.type]
+}
+
+object FromAsyncBundle
+{
+  def apply[T <: Data](x: AsyncBundle[T], sync: Int = 3): DecoupledIO[T] = {
+    val sink = Module(new AsyncQueueSink(x.mem(0), x.depth, sync))
+    x.ridx := sink.io.ridx
+    x.ridx_valid := sink.io.ridx_valid
+    sink.io.widx := x.widx
+    sink.io.widx_valid := x.widx_valid
+    sink.io.mem  := x.mem
+    sink.io.source_reset_n := x.source_reset_n
+    x.sink_reset_n := !sink.reset
+    val out = Wire(Decoupled(x.mem(0)))
+    out.valid := sink.io.deq.valid
+    out.bits := sink.io.deq.bits
+    sink.io.deq.ready := out.ready
+    out
+  }
+}
+
+object ToAsyncBundle
+{
+  def apply[T <: Data](x: ReadyValidIO[T], depth: Int = 8, sync: Int = 3): AsyncBundle[T] = {
+    val source = Module(new AsyncQueueSource(x.bits, depth, sync))
+    source.io.enq.valid := x.valid
+    source.io.enq.bits := x.bits
+    x.ready := source.io.enq.ready
+    val out = Wire(new AsyncBundle(depth, x.bits))
+    source.io.ridx := out.ridx
+    source.io.ridx_valid := out.ridx_valid
+    out.mem := source.io.mem
+    out.widx := source.io.widx
+    out.widx_valid := source.io.widx_valid
+    source.io.sink_reset_n := out.sink_reset_n
+    out.source_reset_n := !source.reset
+    out
+  }
+}
+