Merge remote-tracking branch 'origin/master' into jchang_test

2016-12-09 16:56:49 -08:00 · 2016-12-09 16:56:49 -08:00 · 762afcd54a
commit 762afcd54a
parent 4c3083c181 09afbbafdb
67 changed files with 950 additions and 270 deletions
--- a/.travis.yml
+++ b/.travis.yml
@ -1,37 +1,18 @@
 git:
  submodules: false
 language: scala
-# run on new infrastructure
-sudo: false
+sudo: required
+services:
+  - docker
 cache:
-  apt: true
  directories:
    $HOME/.ivy2
-    regression/install
-    emulator/verilator
-
-# packages needed to build riscv-tools
-addons:
-  apt:
-    sources:
-      - ubuntu-toolchain-r-test
-    packages:
-      - gcc-4.8
-      - g++-4.8
-      - gperf
-      - autoconf
-      - automake
-      - autotools-dev
-      - libmpc-dev
-      - libmpfr-dev
-      - libgmp-dev
-      - gawk
-      - build-essential
-      - bison
-      - flex
-      - texinfo

 env:
+  global:
+    - CACHE_NAME=RocketChip
+    - RISCV=/opt/riscv
+    - TORTURE_CONFIG=default
  matrix:
    - SUITE=RocketSuiteA
    - SUITE=RocketSuiteB
@ -47,15 +28,9 @@ branches:
    - boom
    - /^hurricane.*$/

-install:
-  - make tools verilator -C regression SUITE=none
-
 before_install:
-  - export CXX=g++-4.8 CC=gcc-4.8
+  - docker pull hcook/docker-riscv

 script:
-  - make emulator-ndebug -C regression SUITE=$SUITE TORTURE_CONFIG=default
-  - make emulator-regression-tests -C regression SUITE=$SUITE TORTURE_CONFIG=default
-
-before_cache:
-  - ls -t regression/install | tail -n+2 | sed s@^@regression/install/@ | xargs rm -rf
+  - docker run -v /home/travis/build/ucb-bar/rocket-chip:/opt/riscv/test hcook/docker-riscv /bin/sh -c  "which verilator; echo $INSTALLED_VERILATOR" 
+  - docker run -v $HOME/.ivy2:/opt/riscv/test/.ivy2 -v /home/travis/build/ucb-bar/rocket-chip:/opt/riscv/test hcook/docker-riscv /bin/sh -c  "make emulator-ndebug -C regression SUITE=$SUITE; make emulator-regression-tests -C regression SUITE=$SUITE"
--- a/emulator/Makefrag-verilator
+++ b/emulator/Makefrag-verilator
@ -22,8 +22,8 @@ $(generated_dir_debug)/%.fir $(generated_dir_debug)/%.prm $(generated_dir_debug)

 # Build and install our own Verilator, to work around versionining issues.
 VERILATOR_VERSION=3.884
-VERILATOR_SRCDIR=verilator/src/verilator-$(VERILATOR_VERSION)
-INSTALLED_VERILATOR=$(abspath verilator/install/bin/verilator)
+VERILATOR_SRCDIR ?= verilator/src/verilator-$(VERILATOR_VERSION)
+INSTALLED_VERILATOR ?= $(abspath verilator/install/bin/verilator)
 $(INSTALLED_VERILATOR): $(VERILATOR_SRCDIR)/bin/verilator
 	$(MAKE) -C $(VERILATOR_SRCDIR) installbin installdata
 	touch $@
--- a/src/main/scala/config/Config.scala
+++ b/src/main/scala/config/Config.scala
--- a/src/main/scala/coreplex/BaseCoreplex.scala
+++ b/src/main/scala/coreplex/BaseCoreplex.scala
@ -31,7 +31,8 @@ case object BroadcastConfig extends Field[BroadcastConfig]
 case class BankedL2Config(
  nMemoryChannels:  Int = 1,
  nBanksPerChannel: Int = 1,
-  coherenceManager: Parameters => (TLInwardNode, TLOutwardNode) = { case p =>
+  coherenceManager: Parameters => (TLInwardNode, TLOutwardNode) = { case q =>
+    implicit val p = q
    val BroadcastConfig(nTrackers, bufferless) = p(BroadcastConfig)
    val bh = LazyModule(new TLBroadcast(p(CacheBlockBytes), nTrackers, bufferless))
    (bh.node, TLWidthWidget(p(L1toL2Config).beatBytes)(bh.node))
@ -54,9 +55,10 @@ trait HasCoreplexParameters {

 case class CoreplexParameters(implicit val p: Parameters) extends HasCoreplexParameters

-abstract class BareCoreplex(implicit val p: Parameters) extends LazyModule
-abstract class BareCoreplexBundle[+L <: BareCoreplex](_outer: L) extends Bundle {
+abstract class BareCoreplex(implicit p: Parameters) extends LazyModule
+abstract class BareCoreplexBundle[+L <: BareCoreplex](_outer: L) extends GenericParameterizedBundle(_outer) {
  val outer = _outer
+  implicit val p = outer.p
 }
 abstract class BareCoreplexModule[+L <: BareCoreplex, +B <: BareCoreplexBundle[L]](_outer: L, _io: () => B) extends LazyModuleImp(_outer) {
  val outer = _outer
@ -96,7 +98,6 @@ trait CoreplexNetwork extends HasCoreplexParameters {
 trait CoreplexNetworkBundle extends HasCoreplexParameters {
  val outer: CoreplexNetwork

-  implicit val p = outer.p
  val mmio = outer.mmio.bundleOut
  val interrupts = outer.mmioInt.bundleIn
 }
@ -105,8 +106,6 @@ trait CoreplexNetworkModule extends HasCoreplexParameters {
  val outer: CoreplexNetwork
  val io: CoreplexNetworkBundle

-  implicit val p = outer.p
-
  println("\nGenerated Address Map")
  for (manager <- outer.l1tol2.node.edgesIn(0).manager.managers) {
    val prot = (if (manager.supportsGet)     "R" else "") +
--- a/src/main/scala/coreplex/Configs.scala
+++ b/src/main/scala/coreplex/Configs.scala
@ -4,8 +4,10 @@
 package coreplex

 import Chisel._
-import junctions._
+import config._
 import diplomacy._
+import junctions.PAddrBits
+import rocket._
 import uncore.tilelink._
 import uncore.tilelink2._
 import uncore.coherence._
@ -13,10 +15,7 @@ import uncore.agents._
 import uncore.devices._
 import uncore.converters._
 import uncore.util._
-import rocket._
 import util._
-import util.ConfigUtils._
-import config._

 class BaseCoreplexConfig extends Config (
  { (pname,site,here) =>
@ -95,11 +94,11 @@ class BaseCoreplexConfig extends Config (
          nManagers = site(BankedL2Config).nBanks + 1 /* MMIO */,
          nCachingClients = 1,
          nCachelessClients = 1,
-          maxClientXacts = max_int(
+          maxClientXacts = List(
              // L1 cache
              site(DCacheKey).nMSHRs + 1 /* IOMSHR */,
              // RoCC
-              if (site(BuildRoCC).isEmpty) 1 else site(RoccMaxTaggedMemXacts)),
+              if (site(BuildRoCC).isEmpty) 1 else site(RoccMaxTaggedMemXacts)).max,
          maxClientsPerPort = if (site(BuildRoCC).isEmpty) 1 else 2,
          maxManagerXacts = site(NAcquireTransactors) + 2,
          dataBeats = innerDataBeats,
@ -208,7 +207,7 @@ class WithStatelessBridge extends Config(
  (pname,site,here,up) => pname match {
 /* !!! FIXME
    case BankedL2Config => up(BankedL2Config, site).copy(coherenceManager = { case (_, _) =>
-      val pass = LazyModule(new TLBuffer(0))
+      val pass = LazyModule(new TLBuffer(0)(site))
      (pass.node, pass.node)
    })
 */
--- a/src/main/scala/diplomacy/LazyModule.scala
+++ b/src/main/scala/diplomacy/LazyModule.scala
@ -3,9 +3,10 @@
 package diplomacy

 import Chisel._
+import config._
 import chisel3.internal.sourceinfo.{SourceInfo, SourceLine, UnlocatableSourceInfo}

-abstract class LazyModule
+abstract class LazyModule()(implicit val p: Parameters)
 {
  protected[diplomacy] var bindings = List[() => Unit]()
  protected[diplomacy] var children = List[LazyModule]()
@ -115,4 +116,5 @@ abstract class LazyModuleImp(outer: LazyModule) extends Module
  suggestName(outer.instanceName)

  outer.instantiate()
+  implicit val p = outer.p
 }
--- a/src/main/scala/diplomacy/Nodes.scala
+++ b/src/main/scala/diplomacy/Nodes.scala
@ -3,6 +3,7 @@
 package diplomacy

 import Chisel._
+import config._
 import scala.collection.mutable.ListBuffer
 import chisel3.internal.sourceinfo.SourceInfo

@ -15,7 +16,7 @@ trait InwardNodeImp[DI, UI, EI, BI <: Data]
  def edgeI(pd: DI, pu: UI): EI
  def bundleI(ei: Seq[EI]): Vec[BI]
  def colour: String
-  def connect(bo: => BI, bi: => BI, e: => EI)(implicit sourceInfo: SourceInfo): (Option[LazyModule], () => Unit)
+  def connect(bo: => BI, bi: => BI, e: => EI)(implicit p: Parameters, sourceInfo: SourceInfo): (Option[LazyModule], () => Unit)

  // optional methods to track node graph
  def mixI(pu: UI, node: InwardNode[DI, UI, BI]): UI = pu // insert node into parameters
@ -68,8 +69,8 @@ case class NodeHandle[DI, UI, BI <: Data, DO, UO, BO <: Data]
 trait InwardNodeHandle[DI, UI, BI <: Data]
 {
  val inward: InwardNode[DI, UI, BI]
-  def := (h: OutwardNodeHandle[DI, UI, BI])(implicit sourceInfo: SourceInfo): Option[LazyModule] =
-    inward.:=(h)(sourceInfo)
+  def := (h: OutwardNodeHandle[DI, UI, BI])(implicit p: Parameters, sourceInfo: SourceInfo): Option[LazyModule] =
+    inward.:=(h)(p, sourceInfo)
 }

 trait InwardNode[DI, UI, BI <: Data] extends BaseNode with InwardNodeHandle[DI, UI, BI]
@ -174,7 +175,7 @@ class MixedNode[DI, UI, EI, BI <: Data, DO, UO, EO, BO <: Data](
  lazy val bundleIn  = wireI(flipI(inner.bundleI(edgesIn)))

  // connects the outward part of a node with the inward part of this node
-  override def := (h: OutwardNodeHandle[DI, UI, BI])(implicit sourceInfo: SourceInfo): Option[LazyModule] = {
+  override def := (h: OutwardNodeHandle[DI, UI, BI])(implicit p: Parameters, sourceInfo: SourceInfo): Option[LazyModule] = {
    val x = this // x := y
    val y = h.outward
    val info = sourceLine(sourceInfo, " at ", "")
--- a/src/main/scala/groundtest/Configs.scala
+++ b/src/main/scala/groundtest/Configs.scala
@ -16,7 +16,6 @@ import config._
 import scala.math.max
 import coreplex._
 import rocketchip._
-import util.ConfigUtils._

 /** Actual testing target Configs */

@ -193,10 +192,10 @@ class WithTraceGen extends Config(
    case BuildGroundTest =>
      (p: Parameters) => Module(new GroundTestTraceGenerator()(p))
    case GeneratorKey => TrafficGeneratorParameters(
-      maxRequests = 256,
+      maxRequests = 8192,
      startAddress = 0)
    case AddressBag => {
-      val nSets = 32 // L2 NSets
+      val nSets = 2
      val nWays = 1
      val blockOffset = site(CacheBlockOffsetBits)
      val nBeats = site(TLKey("L1toL2")).dataBeats
--- a/src/main/scala/groundtest/TestHarness.scala
+++ b/src/main/scala/groundtest/TestHarness.scala
@ -8,11 +8,10 @@ import config._
 import rocketchip._
 import util._

-class TestHarness(q: Parameters) extends Module {
+class TestHarness(implicit p: Parameters) extends Module {
  val io = new Bundle {
    val success = Bool(OUTPUT)
  }
-  implicit val p = q

  val dut = Module(LazyModule(new GroundTestTop).module)
  io.success := dut.io.success
--- a/src/main/scala/groundtest/Tile.scala
+++ b/src/main/scala/groundtest/Tile.scala
@ -102,7 +102,7 @@ abstract class GroundTest(implicit val p: Parameters) extends Module
  val io = new GroundTestIO
 }

-class GroundTestTile(implicit val p: Parameters) extends LazyModule with HasGroundTestParameters {
+class GroundTestTile(implicit p: Parameters) extends LazyModule with HasGroundTestParameters {
  val dcacheParams = p.alterPartial {
    case CacheName => CacheName("L1D")
    case rocket.TLCacheEdge => cachedOut.edgesOut(0)
--- a/src/main/scala/rocket/Dcache.scala
+++ b/src/main/scala/rocket/Dcache.scala
@ -42,7 +42,7 @@ class DCache(cfg: DCacheConfig, val scratch: () => Option[AddressSet])(implicit
  override lazy val module = new DCacheModule(this) 
 }

-class DCacheModule(outer: DCache)(implicit p: Parameters) extends HellaCacheModule(outer)(p) {
+class DCacheModule(outer: DCache) extends HellaCacheModule(outer) {

  val maxUncachedInFlight = cfg.nMMIOs

--- a/src/main/scala/rocket/HellaCache.scala
+++ b/src/main/scala/rocket/HellaCache.scala
@ -129,7 +129,7 @@ class HellaCacheIO(implicit p: Parameters) extends CoreBundle()(p) {
  val ordered = Bool(INPUT)
 }

-abstract class HellaCache(val cfg: DCacheConfig)(implicit val p: Parameters) extends LazyModule {
+abstract class HellaCache(val cfg: DCacheConfig)(implicit p: Parameters) extends LazyModule {
  val node = TLClientNode(TLClientParameters(
    sourceId = IdRange(0, cfg.nMSHRs + cfg.nMMIOs),
    supportsProbe = TransferSizes(p(CacheBlockBytes))))
@ -142,7 +142,7 @@ class HellaCacheBundle(outer: HellaCache)(implicit p: Parameters) extends Bundle
  val mem = outer.node.bundleOut
 }

-class HellaCacheModule(outer: HellaCache)(implicit val p: Parameters) extends LazyModuleImp(outer)
+class HellaCacheModule(outer: HellaCache) extends LazyModuleImp(outer)
    with HasL1HellaCacheParameters {
  implicit val cfg = outer.cfg
  val io = new HellaCacheBundle(outer)
--- a/src/main/scala/rocket/NBDcache.scala
+++ b/src/main/scala/rocket/NBDcache.scala
@ -675,7 +675,7 @@ class NonBlockingDCache(cfg: DCacheConfig)(implicit p: Parameters) extends Hella
  override lazy val module = new NonBlockingDCacheModule(this) 
 }

-class NonBlockingDCacheModule(outer: NonBlockingDCache)(implicit p: Parameters) extends HellaCacheModule(outer)(p) {
+class NonBlockingDCacheModule(outer: NonBlockingDCache) extends HellaCacheModule(outer) {

  require(isPow2(nWays)) // TODO: relax this
  require(p(DataScratchpadSize) == 0)
--- a/src/main/scala/rocket/ScratchpadSlavePort.scala
+++ b/src/main/scala/rocket/ScratchpadSlavePort.scala
@ -11,7 +11,7 @@ import uncore.constants._
 import uncore.tilelink2._
 import uncore.util._

-class ScratchpadSlavePort(implicit val p: Parameters) extends LazyModule {
+class ScratchpadSlavePort(implicit p: Parameters) extends LazyModule {
  val coreDataBytes = p(XLen)/8
  val node = TLManagerNode(TLManagerPortParameters(
    Seq(TLManagerParameters(
--- a/src/main/scala/rocket/fpu.scala
+++ b/src/main/scala/rocket/fpu.scala
@ -308,17 +308,15 @@ class FPToInt(implicit p: Parameters) extends FPUModule()(p) {
  val dcmp = Module(new hardfloat.CompareRecFN(maxExpWidth, maxSigWidth))
  dcmp.io.a := in.in1
  dcmp.io.b := in.in2
-  dcmp.io.signaling := Bool(true)
-  val dcmp_out = (~in.rm & Cat(dcmp.io.lt, dcmp.io.eq)).orR
-  val dcmp_exc = dcmp.io.exceptionFlags
+  dcmp.io.signaling := !in.rm(1)

  io.out.bits.toint := Mux(in.rm(0), classify_out, unrec_int)
  io.out.bits.store := unrec_mem
  io.out.bits.exc := Bits(0)

  when (in.cmd === FCMD_CMP) {
-    io.out.bits.toint := dcmp_out
-    io.out.bits.exc := dcmp_exc
+    io.out.bits.toint := (~in.rm & Cat(dcmp.io.lt, dcmp.io.eq)).orR
+    io.out.bits.exc := dcmp.io.exceptionFlags
  }
  when (in.cmd === FCMD_CVT_IF) {
    val minXLen = 32
--- a/src/main/scala/rocket/rocc.scala
+++ b/src/main/scala/rocket/rocc.scala
@ -42,10 +42,10 @@ class RoCCResponse(implicit p: Parameters) extends CoreBundle()(p) {
 class RoCCInterface(implicit p: Parameters) extends CoreBundle()(p) {
  val cmd = Decoupled(new RoCCCommand).flip
  val resp = Decoupled(new RoCCResponse)
-  val mem = new HellaCacheIO()(p.alterPartial({ case CacheName => CacheName("L1D") }))
+  val mem = new HellaCacheIO
  val busy = Bool(OUTPUT)
  val interrupt = Bool(OUTPUT)
-  
+
  // These should be handled differently, eventually
  val autl = new ClientUncachedTileLinkIO
  val utl = Vec(p(RoccNMemChannels), new ClientUncachedTileLinkIO)
--- a/src/main/scala/rocket/tile.scala
+++ b/src/main/scala/rocket/tile.scala
@ -54,9 +54,9 @@ class RocketTile(tileId: Int)(implicit p: Parameters) extends LazyModule {
  cachedOut := dcache.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) }
-  
+
  lazy val module = new LazyModuleImp(this) {
    val io = new Bundle {
      val cached = cachedOut.bundleOut
@ -95,7 +95,7 @@ class RocketTile(tileId: Int)(implicit p: Parameters) extends LazyModule {
      cmdRouter.io.in <> core.io.rocc.cmd

      val roccs = buildRocc.zipWithIndex.map { case (accelParams, i) =>
-        val rocc = accelParams.generator(p.alterPartial({
+        val rocc = accelParams.generator(dcacheParams.alterPartial({
          case RoccNMemChannels => accelParams.nMemChannels
          case RoccNPTWPorts => accelParams.nPTWPorts
        }))
--- a/src/main/scala/rocketchip/BaseTop.scala
+++ b/src/main/scala/rocketchip/BaseTop.scala
@ -12,15 +12,13 @@ import uncore.devices._
 import util._
 import rocket._

-/** Enable or disable monitoring of Diplomatic buses */
-case object TLEmitMonitors extends Field[Boolean]
-
-abstract class BareTop(implicit val p: Parameters) extends LazyModule {
+abstract class BareTop(implicit p: Parameters) extends LazyModule {
  TopModule.contents = Some(this)
 }

-abstract class BareTopBundle[+L <: BareTop](_outer: L) extends Bundle {
+abstract class BareTopBundle[+L <: BareTop](_outer: L) extends GenericParameterizedBundle(_outer) {
  val outer = _outer
+  implicit val p = outer.p
 }

 abstract class BareTopModule[+L <: BareTop, +B <: BareTopBundle[L]](_outer: L, _io: () => B) extends LazyModuleImp(_outer) {
@ -32,8 +30,6 @@ abstract class BareTopModule[+L <: BareTop, +B <: BareTopBundle[L]](_outer: L, _
 trait TopNetwork extends HasPeripheryParameters {
  val module: TopNetworkModule

-  TLImp.emitMonitors = p(TLEmitMonitors)
-
  // Add a SoC and peripheral bus
  val socBus = LazyModule(new TLXbar)
  val peripheryBus = LazyModule(new TLXbar)
@ -47,13 +43,11 @@ trait TopNetwork extends HasPeripheryParameters {

 trait TopNetworkBundle extends HasPeripheryParameters {
  val outer: TopNetwork
-  implicit val p = outer.p
 }

 trait TopNetworkModule extends HasPeripheryParameters {
  val io: TopNetworkBundle
  val outer: TopNetwork
-  implicit val p = outer.p
 }

 /** Base Top with no Periphery */
--- a/src/main/scala/rocketchip/Configs.scala
+++ b/src/main/scala/rocketchip/Configs.scala
@ -8,7 +8,7 @@ import junctions._
 import rocket._
 import diplomacy._
 import uncore.agents._
-import uncore.tilelink._
+import uncore.tilelink2._
 import uncore.devices._
 import uncore.converters._
 import util._
@ -21,8 +21,11 @@ import config._

 class BasePlatformConfig extends Config(
  (pname,site,here) => pname match {
+    // TileLink connection parameters
+    case TLMonitorBuilder => (args: TLMonitorArgs) => Some(LazyModule(new TLMonitor(args)))
+    case TLFuzzReadyValid => false
+    case TLCombinationalCheck => false
    //Memory Parameters
-    case TLEmitMonitors => true
    case NExtTopInterrupts => 2
    case SOCBusConfig => site(L1toL2Config)
    case PeripheryBusConfig => TLBusConfig(beatBytes = 4)
@ -143,16 +146,9 @@ class With64BitPeriphery extends Config (
  }
 )

-class WithTLMonitors extends Config (
-  (pname, site, here) => pname match {
-    case TLEmitMonitors => true
-    case _ => throw new CDEMatchError
-  }
-)
-
 class WithoutTLMonitors extends Config (
  (pname, site, here) => pname match {
-    case TLEmitMonitors => false
+    case TLMonitorBuilder => (args: TLMonitorArgs) => None
    case _ => throw new CDEMatchError
  }
 )
--- a/src/main/scala/rocketchip/TestHarness.scala
+++ b/src/main/scala/rocketchip/TestHarness.scala
@ -9,11 +9,10 @@ import diplomacy._
 import coreplex._
 import uncore.axi4._

-class TestHarness(q: Parameters) extends Module {
+class TestHarness()(implicit p: Parameters) extends Module {
  val io = new Bundle {
    val success = Bool(OUTPUT)
  }
-  implicit val p = q
  val dut = Module(LazyModule(new ExampleRocketTop).module)

  for (int <- dut.io.interrupts(0))
--- a/src/main/scala/uncore/ahb/Bundles.scala
+++ b/src/main/scala/uncore/ahb/Bundles.scala
@ -0,0 +1,35 @@
+// See LICENSE.SiFive for license details.
+
+package uncore.ahb
+
+import Chisel._
+import util.GenericParameterizedBundle
+
+abstract class AHBBundleBase(params: AHBBundleParameters) extends GenericParameterizedBundle(params)
+
+// Signal directions are from the master's point-of-view
+class AHBBundle(params: AHBBundleParameters) extends AHBBundleBase(params)
+{
+  // Flow control signals from the master
+  val hmastlock = Bool(OUTPUT)
+  val htrans    = UInt(OUTPUT, width = params.transBits)
+  val hsel      = Bool(OUTPUT) // on a master, drive this with true
+  val hready    = Bool(OUTPUT) // on a master, drive this from readyout
+
+  // Payload signals
+  val hwrite    = Bool(OUTPUT)
+  val haddr     = UInt(OUTPUT, width = params.addrBits)
+  val hsize     = UInt(OUTPUT, width = params.sizeBits)
+  val hburst    = UInt(OUTPUT, width = params.burstBits)
+  val hprot     = UInt(OUTPUT, width = params.protBits)
+  val hwdata    = UInt(OUTPUT, width = params.dataBits)
+
+  val hreadyout = Bool(INPUT)
+  val hresp     = Bool(INPUT)
+  val hrdata    = UInt(INPUT, width = params.dataBits)
+}
+
+object AHBBundle
+{
+  def apply(params: AHBBundleParameters) = new AHBBundle(params)
+}
--- a/src/main/scala/uncore/ahb/Nodes.scala
+++ b/src/main/scala/uncore/ahb/Nodes.scala
@ -0,0 +1,59 @@
+// See LICENSE.SiFive for license details.
+
+package uncore.ahb
+
+import Chisel._
+import chisel3.internal.sourceinfo.SourceInfo
+import config._
+import diplomacy._
+
+object AHBImp extends NodeImp[AHBMasterPortParameters, AHBSlavePortParameters, AHBEdgeParameters, AHBEdgeParameters, AHBBundle]
+{
+  def edgeO(pd: AHBMasterPortParameters, pu: AHBSlavePortParameters): AHBEdgeParameters = AHBEdgeParameters(pd, pu)
+  def edgeI(pd: AHBMasterPortParameters, pu: AHBSlavePortParameters): AHBEdgeParameters = AHBEdgeParameters(pd, pu)
+  def bundleO(eo: Seq[AHBEdgeParameters]): Vec[AHBBundle] = {
+    require (!eo.isEmpty)
+    Vec(eo.size, AHBBundle(eo.map(_.bundle).reduce(_.union(_))))
+  }
+  def bundleI(ei: Seq[AHBEdgeParameters]): Vec[AHBBundle] = {
+    require (!ei.isEmpty)
+    Vec(ei.size, AHBBundle(ei.map(_.bundle).reduce(_.union(_))))
+  }
+
+  def colour = "#00ccff" // bluish
+  override def labelI(ei: AHBEdgeParameters) = (ei.slave.beatBytes * 8).toString
+  override def labelO(eo: AHBEdgeParameters) = (eo.slave.beatBytes * 8).toString
+
+  def connect(bo: => AHBBundle, bi: => AHBBundle, ei: => AHBEdgeParameters)(implicit p: Parameters, sourceInfo: SourceInfo): (Option[LazyModule], () => Unit) = {
+    (None, () => { bi <> bo })
+  }
+
+  override def mixO(pd: AHBMasterPortParameters, node: OutwardNode[AHBMasterPortParameters, AHBSlavePortParameters, AHBBundle]): AHBMasterPortParameters  =
+   pd.copy(masters = pd.masters.map  { c => c.copy (nodePath = node +: c.nodePath) })
+  override def mixI(pu: AHBSlavePortParameters, node: InwardNode[AHBMasterPortParameters, AHBSlavePortParameters, AHBBundle]): AHBSlavePortParameters =
+   pu.copy(slaves  = pu.slaves.map { m => m.copy (nodePath = node +: m.nodePath) })
+}
+
+// Nodes implemented inside modules
+case class AHBIdentityNode() extends IdentityNode(AHBImp)
+case class AHBMasterNode(portParams: AHBMasterPortParameters, numPorts: Range.Inclusive = 1 to 1)
+  extends SourceNode(AHBImp)(portParams, numPorts)
+case class AHBSlaveNode(portParams: AHBSlavePortParameters, numPorts: Range.Inclusive = 1 to 1)
+  extends SinkNode(AHBImp)(portParams, numPorts)
+case class AHBAdapterNode(
+  masterFn:       Seq[AHBMasterPortParameters]  => AHBMasterPortParameters,
+  slaveFn:        Seq[AHBSlavePortParameters] => AHBSlavePortParameters,
+  numMasterPorts: Range.Inclusive = 1 to 1,
+  numSlavePorts:  Range.Inclusive = 1 to 1)
+  extends InteriorNode(AHBImp)(masterFn, slaveFn, numMasterPorts, numSlavePorts)
+
+// Nodes passed from an inner module
+case class AHBOutputNode() extends OutputNode(AHBImp)
+case class AHBInputNode() extends InputNode(AHBImp)
+
+// Nodes used for external ports
+case class AHBBlindOutputNode(portParams: AHBSlavePortParameters) extends BlindOutputNode(AHBImp)(portParams)
+case class AHBBlindInputNode(portParams: AHBMasterPortParameters) extends BlindInputNode(AHBImp)(portParams)
+
+case class AHBInternalOutputNode(portParams: AHBSlavePortParameters) extends InternalOutputNode(AHBImp)(portParams)
+case class AHBInternalInputNode(portParams: AHBMasterPortParameters) extends InternalInputNode(AHBImp)(portParams)
--- a/src/main/scala/uncore/ahb/Parameters.scala
+++ b/src/main/scala/uncore/ahb/Parameters.scala
@ -0,0 +1,99 @@
+// See LICENSE.SiFive for license details.
+
+package uncore.ahb
+
+import Chisel._
+import config._
+import diplomacy._
+import scala.math.max
+
+case class AHBSlaveParameters(
+  address:       Seq[AddressSet],
+  regionType:    RegionType.T  = RegionType.GET_EFFECTS,
+  executable:    Boolean       = false, // processor can execute from this memory
+  nodePath:      Seq[BaseNode] = Seq(),
+  supportsWrite: TransferSizes = TransferSizes.none,
+  supportsRead:  TransferSizes = TransferSizes.none)
+{
+  address.foreach { a => require (a.finite) }
+    address.combinations(2).foreach { case Seq(x,y) => require (!x.overlaps(y)) }
+
+  val name = nodePath.lastOption.map(_.lazyModule.name).getOrElse("disconnected")
+  val maxTransfer = max(supportsWrite.max, supportsRead.max)
+  val maxAddress = address.map(_.max).max
+  val minAlignment = address.map(_.alignment).min
+
+  // The device had better not support a transfer larger than it's alignment
+  require (minAlignment >= maxTransfer)
+}
+
+case class AHBSlavePortParameters(
+  slaves:    Seq[AHBSlaveParameters],
+  beatBytes: Int)
+{
+  require (!slaves.isEmpty)
+  require (isPow2(beatBytes))
+
+  val maxTransfer = slaves.map(_.maxTransfer).max
+  val maxAddress = slaves.map(_.maxAddress).max
+
+  // Check the link is not pointlessly wide
+  require (maxTransfer >= beatBytes)
+  // Check that the link can be implemented in AHB
+  require (maxTransfer <= beatBytes * AHBParameters.maxTransfer)
+
+  lazy val routingMask = AddressDecoder(slaves.map(_.address))
+  def findSafe(address: UInt) = Vec(slaves.map(_.address.map(_.contains(address)).reduce(_ || _)))
+  def findFast(address: UInt) = Vec(slaves.map(_.address.map(_.widen(~routingMask)).distinct.map(_.contains(address)).reduce(_ || _)))
+
+  // Require disjoint ranges for addresses
+  slaves.combinations(2).foreach { case Seq(x,y) =>
+    x.address.foreach { a => y.address.foreach { b =>
+      require (!a.overlaps(b))
+    } }
+  }
+}
+
+case class AHBMasterParameters(
+  nodePath: Seq[BaseNode] = Seq())
+{
+  val name = nodePath.lastOption.map(_.lazyModule.name).getOrElse("disconnected")
+}
+
+case class AHBMasterPortParameters(
+  masters: Seq[AHBMasterParameters])
+
+case class AHBBundleParameters(
+  addrBits: Int,
+  dataBits: Int)
+{
+  require (dataBits >= 8)
+  require (addrBits >= 1)
+  require (isPow2(dataBits))
+
+  // Bring the globals into scope
+  val transBits = AHBParameters.transBits
+  val burstBits = AHBParameters.burstBits
+  val protBits  = AHBParameters.protBits
+  val sizeBits  = AHBParameters.sizeBits
+
+  def union(x: AHBBundleParameters) =
+    AHBBundleParameters(
+      max(addrBits, x.addrBits),
+      max(dataBits, x.dataBits))
+}
+
+object AHBBundleParameters
+{
+  def apply(master: AHBMasterPortParameters, slave: AHBSlavePortParameters) =
+    new AHBBundleParameters(
+      addrBits = log2Up(slave.maxAddress+1),
+      dataBits = slave.beatBytes * 8)
+}
+
+case class AHBEdgeParameters(
+  master: AHBMasterPortParameters,
+  slave:  AHBSlavePortParameters)
+{
+  val bundle = AHBBundleParameters(master, slave)
+}
--- a/src/main/scala/uncore/ahb/Protocol.scala
+++ b/src/main/scala/uncore/ahb/Protocol.scala
@ -0,0 +1,40 @@
+// See LICENSE.SiFive for license details.
+
+package uncore.ahb
+
+import Chisel._
+import chisel3.util.{Irrevocable, IrrevocableIO}
+
+object AHBParameters
+{
+  // These are all fixed by the AHB standard:
+  val transBits = 2
+  val burstBits = 3
+  val protBits  = 4
+  val sizeBits  = 3  // 8*2^s
+
+  val TRANS_IDLE   = UInt(0, width = transBits) // No transfer requested, not in a burst
+  val TRANS_BUSY   = UInt(1, width = transBits) // No transfer requested, in a burst
+  val TRANS_NONSEQ = UInt(2, width = transBits) // First (potentially only) request in a burst
+  val TRANS_SEQ    = UInt(3, width = transBits) // Following requests in a burst
+
+  val BURST_SINGLE = UInt(0, width = burstBits) // Single access (no burst)
+  val BURST_INCR   = UInt(1, width = burstBits) // Incrementing burst of arbitrary length, not crossing 1KB
+  val BURST_WRAP4  = UInt(2, width = burstBits) // 4-beat wrapping burst
+  val BURST_INCR4  = UInt(3, width = burstBits) // 4-beat incrementing burst
+  val BURST_WRAP8  = UInt(4, width = burstBits) // 8-beat wrapping burst
+  val BURST_INCR8  = UInt(5, width = burstBits) // 8-beat incrementing burst
+  val BURST_WRAP16 = UInt(6, width = burstBits) // 16-beat wrapping burst
+  val BURST_INCR16 = UInt(7, width = burstBits) // 16-beat incrementing burst
+
+  val maxTransfer = 16
+
+  val RESP_OKAY  = Bool(false)
+  val RESP_ERROR = Bool(true)
+
+  val PROT_DATA        = UInt(1, width = protBits)
+  val PROT_PRIVILEDGED = UInt(2, width = protBits)
+  val PROT_BUFFERABLE  = UInt(4, width = protBits)
+  val PROT_CACHEABLE   = UInt(8, width = protBits)
+  def PROT_DEFAULT = PROT_DATA | PROT_PRIVILEDGED
+}
--- a/src/main/scala/uncore/ahb/RegisterRouter.scala
+++ b/src/main/scala/uncore/ahb/RegisterRouter.scala
@ -0,0 +1,112 @@
+// See LICENSE.SiFive for license details.
+
+package uncore.ahb
+
+import Chisel._
+import config._
+import diplomacy._
+import regmapper._
+import scala.math.{min,max}
+
+class AHBRegisterNode(address: AddressSet, concurrency: Int = 0, beatBytes: Int = 4, undefZero: Boolean = true, executable: Boolean = false)
+  extends AHBSlaveNode(AHBSlavePortParameters(
+    Seq(AHBSlaveParameters(
+      address       = Seq(address),
+      executable    = executable,
+      supportsWrite = TransferSizes(1, min(address.alignment.toInt, beatBytes * AHBParameters.maxTransfer)),
+      supportsRead  = TransferSizes(1, min(address.alignment.toInt, beatBytes * AHBParameters.maxTransfer)))),
+    beatBytes  = beatBytes))
+{
+  require (address.contiguous)
+
+  // Calling this method causes the matching AHB bundle to be
+  // configured to route all requests to the listed RegFields.
+  def regmap(mapping: RegField.Map*) = {
+    val ahb = bundleIn(0)
+
+    val indexBits = log2Up((address.mask+1)/beatBytes)
+    val params = RegMapperParams(indexBits, beatBytes, 1)
+    val in = Wire(Decoupled(new RegMapperInput(params)))
+    val out = RegMapper(beatBytes, concurrency, undefZero, in, mapping:_*)
+
+    val d_phase = RegInit(Bool(false))
+    val d_taken = Reg(Bool())
+    val d_read  = Reg(Bool())
+    val d_index = Reg(UInt(width = indexBits))
+    val d_mask  = Reg(UInt(width = beatBytes))
+
+    // Only send the request to the RR once
+    d_taken := d_phase && in.ready
+    in.valid := d_phase && !d_taken
+
+    in.bits.read  := d_read
+    in.bits.index := d_index
+    in.bits.data  := ahb.hwdata
+    in.bits.mask  := d_mask
+    in.bits.extra := UInt(0)
+
+    when (ahb.hready) { d_phase := Bool(false) }
+    ahb.hreadyout := !d_phase || out.valid
+    ahb.hresp     := AHBParameters.RESP_OKAY
+    ahb.hrdata    := out.bits.data
+
+    val request = ahb.htrans === AHBParameters.TRANS_NONSEQ || ahb.htrans === AHBParameters.TRANS_SEQ
+    when (ahb.hready && ahb.hsel && request) {
+      assert (!in.valid || in.ready)
+      d_phase := Bool(true)
+      d_taken := Bool(false)
+      d_read  := !ahb.hwrite
+      d_index := ahb.haddr >> log2Ceil(beatBytes)
+      d_mask  := uncore.tilelink2.maskGen(ahb.haddr, ahb.hsize, beatBytes)
+    }
+
+    out.ready := Bool(true)
+    assert (d_phase || !out.valid)
+  }
+}
+
+object AHBRegisterNode
+{
+  def apply(address: AddressSet, concurrency: Int = 0, beatBytes: Int = 4, undefZero: Boolean = true, executable: Boolean = false) =
+    new AHBRegisterNode(address, concurrency, beatBytes, undefZero, executable)
+}
+
+// These convenience methods below combine to make it possible to create a AHB
+// register mapped device from a totally abstract register mapped device.
+
+abstract class AHBRegisterRouterBase(address: AddressSet, interrupts: Int, concurrency: Int, beatBytes: Int, undefZero: Boolean, executable: Boolean)(implicit p: Parameters) extends LazyModule
+{
+  val node = AHBRegisterNode(address, concurrency, beatBytes, undefZero, executable)
+  val intnode = uncore.tilelink2.IntSourceNode(interrupts)
+}
+
+case class AHBRegBundleArg(interrupts: Vec[Vec[Bool]], in: Vec[AHBBundle])(implicit val p: Parameters)
+
+class AHBRegBundleBase(arg: AHBRegBundleArg) extends Bundle
+{
+  implicit val p = arg.p
+  val interrupts = arg.interrupts
+  val in = arg.in
+}
+
+class AHBRegBundle[P](val params: P, arg: AHBRegBundleArg) extends AHBRegBundleBase(arg)
+
+class AHBRegModule[P, B <: AHBRegBundleBase](val params: P, bundleBuilder: => B, router: AHBRegisterRouterBase)
+  extends LazyModuleImp(router) with HasRegMap
+{
+  val io = bundleBuilder
+  val interrupts = if (io.interrupts.isEmpty) Vec(0, Bool()) else io.interrupts(0)
+  def regmap(mapping: RegField.Map*) = router.node.regmap(mapping:_*)
+}
+
+class AHBRegisterRouter[B <: AHBRegBundleBase, M <: LazyModuleImp]
+   (val base: BigInt, val interrupts: Int = 0, val size: BigInt = 4096, val concurrency: Int = 0, val beatBytes: Int = 4, undefZero: Boolean = true, executable: Boolean = false)
+   (bundleBuilder: AHBRegBundleArg => B)
+   (moduleBuilder: (=> B, AHBRegisterRouterBase) => M)(implicit p: Parameters)
+  extends AHBRegisterRouterBase(AddressSet(base, size-1), interrupts, concurrency, beatBytes, undefZero, executable)
+{
+  require (isPow2(size))
+  // require (size >= 4096) ... not absolutely required, but highly recommended
+
+  lazy val module = moduleBuilder(bundleBuilder(AHBRegBundleArg(intnode.bundleOut, node.bundleIn)), this)
+}
--- a/src/main/scala/uncore/ahb/SRAM.scala
+++ b/src/main/scala/uncore/ahb/SRAM.scala
@ -0,0 +1,99 @@
+// See LICENSE.SiFive for license details.
+
+package uncore.ahb
+
+import Chisel._
+import config._
+import diplomacy._
+
+class AHBRAM(address: AddressSet, executable: Boolean = true, beatBytes: Int = 4)(implicit p: Parameters) extends LazyModule
+{
+  val node = AHBSlaveNode(AHBSlavePortParameters(
+    Seq(AHBSlaveParameters(
+      address       = List(address),
+      regionType    = RegionType.UNCACHED,
+      executable    = executable,
+      supportsRead  = TransferSizes(1, beatBytes * AHBParameters.maxTransfer),
+      supportsWrite = TransferSizes(1, beatBytes * AHBParameters.maxTransfer))),
+    beatBytes  = beatBytes))
+
+  // We require the address range to include an entire beat (for the write mask)
+  require ((address.mask & (beatBytes-1)) == beatBytes-1)
+
+  lazy val module = new LazyModuleImp(this) {
+    val io = new Bundle {
+      val in = node.bundleIn
+    }
+
+    def bigBits(x: BigInt, tail: List[Boolean] = List.empty[Boolean]): List[Boolean] =
+      if (x == 0) tail.reverse else bigBits(x >> 1, ((x & 1) == 1) :: tail)
+    val mask = bigBits(address.mask >> log2Ceil(beatBytes))
+
+    val in = io.in(0)
+
+    // The mask and address during the address phase
+    val a_access    = in.htrans === AHBParameters.TRANS_NONSEQ || in.htrans === AHBParameters.TRANS_SEQ
+    val a_request   = in.hready && in.hsel && a_access
+    val a_mask      = uncore.tilelink2.maskGen(in.haddr, in.hsize, beatBytes)
+    val a_address   = Cat((mask zip (in.haddr >> log2Ceil(beatBytes)).toBools).filter(_._1).map(_._2).reverse)
+    val a_write     = in.hwrite
+
+    // The data phase signals
+    val d_wdata = Vec.tabulate(beatBytes) { i => in.hwdata(8*(i+1)-1, 8*i) }
+
+    // AHB writes must occur during the data phase; this poses a structural
+    // hazard with reads which must occur during the address phase. To solve
+    // this problem, we delay the writes until there is a free cycle.
+    //
+    // The idea is to record the address information from address phase and
+    // then as soon as possible flush the pending write. This cannot be done
+    // on a cycle when there is an address phase read, but on any other cycle
+    // the write will execute. In the case of reads following a write, the
+    // result must bypass data from the pending write into the read if they
+    // happen to have matching address.
+
+    // Remove this once HoldUnless is in chisel3
+    def holdUnless[T <: Data](in : T, enable: Bool): T = Mux(!enable, RegEnable(in, enable), in)
+
+    // Pending write?
+    val p_valid     = RegInit(Bool(false))
+    val p_address   = Reg(a_address)
+    val p_mask      = Reg(a_mask)
+    val p_latch_d   = Reg(Bool())
+    val p_wdata     = holdUnless(d_wdata, p_latch_d)
+
+    // Use single-ported memory with byte-write enable
+    val mem = SeqMem(1 << mask.filter(b=>b).size, Vec(beatBytes, Bits(width = 8)))
+
+    // Decide is the SRAM port is used for reading or (potentially) writing
+    val read = a_request && !a_write
+    // In case we choose to stall, we need to hold the read data
+    val d_rdata = holdUnless(mem.read(a_address, read), RegNext(read))
+    // Whenever the port is not needed for reading, execute pending writes
+    when (!read && p_valid) {
+      p_valid := Bool(false)
+      mem.write(p_address, p_wdata, p_mask.toBools)
+    }
+
+    // Record the request for later?
+    p_latch_d := a_request && a_write
+    when (a_request && a_write) {
+      p_valid   := Bool(true)
+      p_address := a_address
+      p_mask    := a_mask
+    }
+
+    // Does the read need to be muxed with the previous write?
+    val a_bypass = a_address === p_address && p_valid
+    val d_bypass = RegEnable(a_bypass, a_request)
+
+    // Mux in data from the pending write
+    val muxdata = Vec((p_mask.toBools zip (p_wdata zip d_rdata))
+                      map { case (m, (p, r)) => Mux(d_bypass && m, p, r) })
+
+    // Finally, the outputs
+    in.hreadyout := LFSR16(Bool(true))(0) // Bool(true)
+    in.hresp     := AHBParameters.RESP_OKAY
+    in.hrdata    := Mux(in.hreadyout, muxdata.asUInt, UInt(0))
+  }
+}
--- a/src/main/scala/uncore/ahb/Test.scala
+++ b/src/main/scala/uncore/ahb/Test.scala
@ -0,0 +1,40 @@
+// See LICENSE.SiFive for license details.
+
+package uncore.ahb
+
+import Chisel._
+import config._
+import diplomacy._
+import uncore.tilelink2._
+import unittest._
+
+class RRTest0(address: BigInt)(implicit p: Parameters) extends AHBRegisterRouter(address, 0, 32, 0, 4)(
+  new AHBRegBundle((), _)    with RRTest0Bundle)(
+  new AHBRegModule((), _, _) with RRTest0Module)
+
+class RRTest1(address: BigInt)(implicit p: Parameters) extends AHBRegisterRouter(address, 0, 32, 1, 4, false)(
+  new AHBRegBundle((), _)    with RRTest1Bundle)(
+  new AHBRegModule((), _, _) with RRTest1Module)
+
+class AHBFuzzBridge()(implicit p: Parameters) extends LazyModule
+{
+  val fuzz  = LazyModule(new TLFuzzer(5000))
+  val model = LazyModule(new TLRAMModel("AHBFuzzMaster"))
+  var xbar  = LazyModule(new AHBFanout)
+  val ram   = LazyModule(new AHBRAM(AddressSet(0x0, 0xff)))
+  val gpio  = LazyModule(new RRTest0(0x100))
+
+  model.node := fuzz.node
+  xbar.node := TLToAHB()(model.node)
+  ram.node  := xbar.node
+  gpio.node := xbar.node
+
+  lazy val module = new LazyModuleImp(this) with HasUnitTestIO {
+    io.finished := fuzz.module.io.finished
+  }
+}
+
+class AHBBridgeTest()(implicit p: Parameters) extends UnitTest(500000) {
+  val dut = Module(LazyModule(new AHBFuzzBridge).module)
+  io.finished := dut.io.finished
+}
--- a/src/main/scala/uncore/ahb/Xbar.scala
+++ b/src/main/scala/uncore/ahb/Xbar.scala
@ -0,0 +1,50 @@
+// See LICENSE.SiFive for license details.
+
+package uncore.ahb
+
+import Chisel._
+import config._
+import diplomacy._
+import regmapper._
+import scala.math.{min,max}
+
+class AHBFanout()(implicit p: Parameters) extends LazyModule {
+  val node = AHBAdapterNode(
+    numSlavePorts  = 1 to 1,
+    numMasterPorts = 1 to 32,
+    masterFn = { case Seq(m) => m },
+    slaveFn  = { seq => seq(0).copy(slaves = seq.flatMap(_.slaves)) })
+
+  lazy val module = new LazyModuleImp(this) {
+    val io = new Bundle {
+      val in = node.bundleIn
+      val out = node.bundleOut
+    }
+
+    // Require consistent bus widths
+    val port0 = node.edgesIn(0).slave
+    node.edgesOut.foreach { edge =>
+      val port = edge.slave
+      require (port.beatBytes == port0.beatBytes,
+        s"${port.slaves.map(_.name)} ${port.beatBytes} vs ${port0.slaves.map(_.name)} ${port0.beatBytes}")
+    }
+
+    val port_addrs = node.edgesOut.map(_.slave.slaves.map(_.address).flatten)
+    val routingMask = AddressDecoder(port_addrs)
+    val route_addrs = port_addrs.map(_.map(_.widen(~routingMask)).distinct)
+
+    val in = io.in(0)
+    val a_sel = Vec(route_addrs.map(seq => seq.map(_.contains(in.haddr)).reduce(_ || _)))
+    val d_sel = Reg(a_sel)
+
+    when (in.hready) { d_sel := a_sel }
+    (a_sel zip io.out) foreach { case (sel, out) =>
+      out := in
+      out.hsel := in.hsel && sel
+    }
+
+    in.hreadyout := !Mux1H(d_sel, io.out.map(!_.hreadyout))
+    in.hresp     :=  Mux1H(d_sel, io.out.map(_.hresp))
+    in.hrdata    :=  Mux1H(d_sel, io.out.map(_.hrdata))
+  }
+}
--- a/src/main/scala/uncore/ahb/package.scala
+++ b/src/main/scala/uncore/ahb/package.scala
@ -0,0 +1,11 @@
+// See LICENSE.SiFive for license details.
+
+package uncore
+
+import Chisel._
+import diplomacy._
+
+package object ahb
+{
+  type AHBOutwardNode = OutwardNodeHandle[AHBMasterPortParameters, AHBSlavePortParameters, AHBBundle]
+}
--- a/src/main/scala/uncore/axi4/Buffer.scala
+++ b/src/main/scala/uncore/axi4/Buffer.scala
@ -4,11 +4,12 @@ package uncore.axi4

 import Chisel._
 import chisel3.internal.sourceinfo.SourceInfo
+import config._
 import diplomacy._
 import scala.math.max

 // pipe is only used if a queue has depth = 1
-class AXI4Buffer(aw: Int = 2, w: Int = 2, b: Int = 2, ar: Int = 2, r: Int = 2, pipe: Boolean = true) extends LazyModule
+class AXI4Buffer(aw: Int = 2, w: Int = 2, b: Int = 2, ar: Int = 2, r: Int = 2, pipe: Boolean = true)(implicit p: Parameters) extends LazyModule
 {
  require (aw >= 0)
  require (w  >= 0)
@ -37,12 +38,12 @@ class AXI4Buffer(aw: Int = 2, w: Int = 2, b: Int = 2, ar: Int = 2, r: Int = 2, p
 object AXI4Buffer
 {
  // applied to the AXI4 source node; y.node := AXI4Buffer(x.node)
-  def apply()                               (x: AXI4OutwardNode)(implicit sourceInfo: SourceInfo): AXI4OutwardNode = apply(2)(x)
-  def apply(entries: Int)                   (x: AXI4OutwardNode)(implicit sourceInfo: SourceInfo): AXI4OutwardNode = apply(entries, true)(x)
-  def apply(entries: Int, pipe: Boolean)    (x: AXI4OutwardNode)(implicit sourceInfo: SourceInfo): AXI4OutwardNode = apply(entries, entries, pipe)(x)
-  def apply(aw: Int, br: Int)               (x: AXI4OutwardNode)(implicit sourceInfo: SourceInfo): AXI4OutwardNode = apply(aw, br, true)(x)
-  def apply(aw: Int, br: Int, pipe: Boolean)(x: AXI4OutwardNode)(implicit sourceInfo: SourceInfo): AXI4OutwardNode = apply(aw, aw, br, aw, br, pipe)(x)
-  def apply(aw: Int, w: Int, b: Int, ar: Int, r: Int, pipe: Boolean = true)(x: AXI4OutwardNode)(implicit sourceInfo: SourceInfo): AXI4OutwardNode = {
+  def apply()                               (x: AXI4OutwardNode)(implicit p: Parameters, sourceInfo: SourceInfo): AXI4OutwardNode = apply(2)(x)
+  def apply(entries: Int)                   (x: AXI4OutwardNode)(implicit p: Parameters, sourceInfo: SourceInfo): AXI4OutwardNode = apply(entries, true)(x)
+  def apply(entries: Int, pipe: Boolean)    (x: AXI4OutwardNode)(implicit p: Parameters, sourceInfo: SourceInfo): AXI4OutwardNode = apply(entries, entries, pipe)(x)
+  def apply(aw: Int, br: Int)               (x: AXI4OutwardNode)(implicit p: Parameters, sourceInfo: SourceInfo): AXI4OutwardNode = apply(aw, br, true)(x)
+  def apply(aw: Int, br: Int, pipe: Boolean)(x: AXI4OutwardNode)(implicit p: Parameters, sourceInfo: SourceInfo): AXI4OutwardNode = apply(aw, aw, br, aw, br, pipe)(x)
+  def apply(aw: Int, w: Int, b: Int, ar: Int, r: Int, pipe: Boolean = true)(x: AXI4OutwardNode)(implicit p: Parameters, sourceInfo: SourceInfo): AXI4OutwardNode = {
    val buffer = LazyModule(new AXI4Buffer(aw, w, b, ar, r, pipe))
    buffer.node := x
    buffer.node
--- a/src/main/scala/uncore/axi4/Fragmenter.scala
+++ b/src/main/scala/uncore/axi4/Fragmenter.scala
@ -5,12 +5,13 @@ package uncore.axi4
 import Chisel._
 import chisel3.internal.sourceinfo.SourceInfo
 import chisel3.util.IrrevocableIO
+import config._
 import diplomacy._
 import scala.math.{min,max}
 import uncore.tilelink2.{leftOR, rightOR, UIntToOH1, OH1ToOH}

 // lite: masters all use only one ID => reads will not be interleaved
-class AXI4Fragmenter(lite: Boolean = false, maxInFlight: => Int = 32, combinational: Boolean = true) extends LazyModule
+class AXI4Fragmenter(lite: Boolean = false, maxInFlight: => Int = 32, combinational: Boolean = true)(implicit p: Parameters) extends LazyModule
 {
  val maxBeats = 1 << AXI4Parameters.lenBits
  def expandTransfer(x: TransferSizes, beatBytes: Int, alignment: BigInt) =
@ -287,7 +288,7 @@ class AXI4FragmenterSideband(maxInFlight: Int, flow: Boolean = false) extends Mo
 object AXI4Fragmenter
 {
  // applied to the AXI4 source node; y.node := AXI4Fragmenter()(x.node)
-  def apply(lite: Boolean = false, maxInFlight: => Int = 32, combinational: Boolean = true)(x: AXI4OutwardNode)(implicit sourceInfo: SourceInfo): AXI4OutwardNode = {
+  def apply(lite: Boolean = false, maxInFlight: => Int = 32, combinational: Boolean = true)(x: AXI4OutwardNode)(implicit p: Parameters, sourceInfo: SourceInfo): AXI4OutwardNode = {
    val fragmenter = LazyModule(new AXI4Fragmenter(lite, maxInFlight, combinational))
    fragmenter.node := x
    fragmenter.node
--- a/src/main/scala/uncore/axi4/Nodes.scala
+++ b/src/main/scala/uncore/axi4/Nodes.scala
@ -4,6 +4,7 @@ package uncore.axi4

 import Chisel._
 import chisel3.internal.sourceinfo.SourceInfo
+import config._
 import diplomacy._

 object AXI4Imp extends NodeImp[AXI4MasterPortParameters, AXI4SlavePortParameters, AXI4EdgeParameters, AXI4EdgeParameters, AXI4Bundle]
@ -23,7 +24,7 @@ object AXI4Imp extends NodeImp[AXI4MasterPortParameters, AXI4SlavePortParameters
  override def labelI(ei: AXI4EdgeParameters) = (ei.slave.beatBytes * 8).toString
  override def labelO(eo: AXI4EdgeParameters) = (eo.slave.beatBytes * 8).toString

-  def connect(bo: => AXI4Bundle, bi: => AXI4Bundle, ei: => AXI4EdgeParameters)(implicit sourceInfo: SourceInfo): (Option[LazyModule], () => Unit) = {
+  def connect(bo: => AXI4Bundle, bi: => AXI4Bundle, ei: => AXI4EdgeParameters)(implicit p: Parameters, sourceInfo: SourceInfo): (Option[LazyModule], () => Unit) = {
    (None, () => { bi <> bo })
  }

--- a/src/main/scala/uncore/axi4/Parameters.scala
+++ b/src/main/scala/uncore/axi4/Parameters.scala
@ -3,6 +3,7 @@
 package uncore.axi4

 import Chisel._
+import config._
 import diplomacy._
 import scala.math.max

--- a/src/main/scala/uncore/axi4/RegisterRouter.scala
+++ b/src/main/scala/uncore/axi4/RegisterRouter.scala
@ -3,6 +3,7 @@
 package uncore.axi4

 import Chisel._
+import config._
 import diplomacy._
 import regmapper._
 import scala.math.{min,max}
@ -77,16 +78,17 @@ object AXI4RegisterNode
 // These convenience methods below combine to make it possible to create a AXI4
 // register mapped device from a totally abstract register mapped device.

-abstract class AXI4RegisterRouterBase(address: AddressSet, interrupts: Int, concurrency: Int, beatBytes: Int, undefZero: Boolean, executable: Boolean) extends LazyModule
+abstract class AXI4RegisterRouterBase(address: AddressSet, interrupts: Int, concurrency: Int, beatBytes: Int, undefZero: Boolean, executable: Boolean)(implicit p: Parameters) extends LazyModule
 {
  val node = AXI4RegisterNode(address, concurrency, beatBytes, undefZero, executable)
  val intnode = uncore.tilelink2.IntSourceNode(interrupts)
 }

-case class AXI4RegBundleArg(interrupts: Vec[Vec[Bool]], in: Vec[AXI4Bundle])
+case class AXI4RegBundleArg(interrupts: Vec[Vec[Bool]], in: Vec[AXI4Bundle])(implicit val p: Parameters)

 class AXI4RegBundleBase(arg: AXI4RegBundleArg) extends Bundle
 {
+  implicit val p = arg.p
  val interrupts = arg.interrupts
  val in = arg.in
 }
@ -104,7 +106,7 @@ class AXI4RegModule[P, B <: AXI4RegBundleBase](val params: P, bundleBuilder: =>
 class AXI4RegisterRouter[B <: AXI4RegBundleBase, M <: LazyModuleImp]
   (val base: BigInt, val interrupts: Int = 0, val size: BigInt = 4096, val concurrency: Int = 0, val beatBytes: Int = 4, undefZero: Boolean = true, executable: Boolean = false)
   (bundleBuilder: AXI4RegBundleArg => B)
-   (moduleBuilder: (=> B, AXI4RegisterRouterBase) => M)
+   (moduleBuilder: (=> B, AXI4RegisterRouterBase) => M)(implicit p: Parameters)
  extends AXI4RegisterRouterBase(AddressSet(base, size-1), interrupts, concurrency, beatBytes, undefZero, executable)
 {
  require (isPow2(size))
--- a/src/main/scala/uncore/axi4/SRAM.scala
+++ b/src/main/scala/uncore/axi4/SRAM.scala
@ -3,9 +3,10 @@
 package uncore.axi4

 import Chisel._
+import config._
 import diplomacy._

-class AXI4RAM(address: AddressSet, executable: Boolean = true, beatBytes: Int = 4) extends LazyModule
+class AXI4RAM(address: AddressSet, executable: Boolean = true, beatBytes: Int = 4)(implicit p: Parameters) extends LazyModule
 {
  val node = AXI4SlaveNode(AXI4SlavePortParameters(
    Seq(AXI4SlaveParameters(
--- a/src/main/scala/uncore/axi4/Test.scala
+++ b/src/main/scala/uncore/axi4/Test.scala
@ -3,19 +3,20 @@
 package uncore.axi4

 import Chisel._
+import config._
 import diplomacy._
 import uncore.tilelink2._
 import unittest._

-class RRTest0(address: BigInt) extends AXI4RegisterRouter(address, 0, 32, 0, 4)(
+class RRTest0(address: BigInt)(implicit p: Parameters) extends AXI4RegisterRouter(address, 0, 32, 0, 4)(
  new AXI4RegBundle((), _)    with RRTest0Bundle)(
  new AXI4RegModule((), _, _) with RRTest0Module)

-class RRTest1(address: BigInt) extends AXI4RegisterRouter(address, 0, 32, 6, 4, false)(
+class RRTest1(address: BigInt)(implicit p: Parameters) extends AXI4RegisterRouter(address, 0, 32, 6, 4, false)(
  new AXI4RegBundle((), _)    with RRTest1Bundle)(
  new AXI4RegModule((), _, _) with RRTest1Module)

-class AXI4LiteFuzzRAM extends LazyModule
+class AXI4LiteFuzzRAM()(implicit p: Parameters) extends LazyModule
 {
  val fuzz  = LazyModule(new TLFuzzer(5000))
  val model = LazyModule(new TLRAMModel("AXI4LiteFuzzRAM"))
@ -33,12 +34,12 @@ class AXI4LiteFuzzRAM extends LazyModule
  }
 }

-class AXI4LiteFuzzRAMTest extends UnitTest(500000) {
+class AXI4LiteFuzzRAMTest()(implicit p: Parameters) extends UnitTest(500000) {
  val dut = Module(LazyModule(new AXI4LiteFuzzRAM).module)
  io.finished := dut.io.finished
 }

-class AXI4FullFuzzRAM extends LazyModule
+class AXI4FullFuzzRAM()(implicit p: Parameters) extends LazyModule
 {
  val fuzz  = LazyModule(new TLFuzzer(5000))
  val model = LazyModule(new TLRAMModel("AXI4FullFuzzRAM"))
@ -56,12 +57,12 @@ class AXI4FullFuzzRAM extends LazyModule
  }
 }

-class AXI4FullFuzzRAMTest extends UnitTest(500000) {
+class AXI4FullFuzzRAMTest(implicit p: Parameters) extends UnitTest(500000) {
  val dut = Module(LazyModule(new AXI4FullFuzzRAM).module)
  io.finished := dut.io.finished
 }

-class AXI4FuzzMaster extends LazyModule
+class AXI4FuzzMaster()(implicit p: Parameters) extends LazyModule
 {
  val node  = AXI4OutputNode()
  val fuzz  = LazyModule(new TLFuzzer(5000))
@ -80,7 +81,7 @@ class AXI4FuzzMaster extends LazyModule
  }
 }

-class AXI4FuzzSlave extends LazyModule
+class AXI4FuzzSlave()(implicit p: Parameters) extends LazyModule
 {
  val node = AXI4InputNode()
  val ram  = LazyModule(new TLRAM(AddressSet(0x0, 0xfff)))
@ -94,7 +95,7 @@ class AXI4FuzzSlave extends LazyModule
  }
 }

-class AXI4FuzzBridge extends LazyModule
+class AXI4FuzzBridge()(implicit p: Parameters) extends LazyModule
 {
  val master = LazyModule(new AXI4FuzzMaster)
  val slave  = LazyModule(new AXI4FuzzSlave)
@ -106,7 +107,7 @@ class AXI4FuzzBridge extends LazyModule
  }
 }

-class AXI4BridgeTest extends UnitTest(500000) {
+class AXI4BridgeTest()(implicit p: Parameters) extends UnitTest(500000) {
  val dut = Module(LazyModule(new AXI4FuzzBridge).module)
  io.finished := dut.io.finished
 }
--- a/src/main/scala/uncore/axi4/ToTL.scala
+++ b/src/main/scala/uncore/axi4/ToTL.scala
@ -4,6 +4,7 @@ package uncore.axi4

 import Chisel._
 import chisel3.internal.sourceinfo.SourceInfo
+import config._
 import diplomacy._
 import uncore.tilelink2._

@ -30,7 +31,7 @@ case class AXI4ToTLNode() extends MixedNode(AXI4Imp, TLImp)(
  numPO = 1 to 1,
  numPI = 1 to 1)

-class AXI4ToTL extends LazyModule
+class AXI4ToTL()(implicit p: Parameters) extends LazyModule
 {
  val node = AXI4ToTLNode()

@ -176,7 +177,7 @@ class AXI4BundleRError(params: AXI4BundleParameters) extends AXI4BundleBase(para

 object AXI4ToTL
 {
-  def apply()(x: AXI4OutwardNode)(implicit sourceInfo: SourceInfo): TLOutwardNode = {
+  def apply()(x: AXI4OutwardNode)(implicit p: Parameters, sourceInfo: SourceInfo): TLOutwardNode = {
    val tl = LazyModule(new AXI4ToTL)
    tl.node := x
    tl.node
--- a/src/main/scala/uncore/devices/Debug.scala
+++ b/src/main/scala/uncore/devices/Debug.scala
@ -332,8 +332,7 @@ object ToAsyncDebugBus
 }

 trait HasDebugModuleParameters {
-  val params : Parameters
-  implicit val p = params
+  implicit val p: Parameters
  val cfg = p(DMKey)
 }

@ -850,8 +849,8 @@ trait DebugModule extends Module with HasDebugModuleParameters with HasRegMap {

 class TLDebugModule(address: BigInt = 0)(implicit p: Parameters)
  extends TLRegisterRouter(address, beatBytes=p(rocket.XLen)/8, executable=true)(
-  new TLRegBundle(p, _ )    with DebugModuleBundle)(
-  new TLRegModule(p, _, _)  with DebugModule)
+  new TLRegBundle((), _ )    with DebugModuleBundle)(
+  new TLRegModule((), _, _)  with DebugModule)


 /** Synchronizers for DebugBus
--- a/src/main/scala/uncore/devices/Plic.scala
+++ b/src/main/scala/uncore/devices/Plic.scala
@ -52,7 +52,7 @@ object PLICConsts
 }

 /** Platform-Level Interrupt Controller */
-class TLPLIC(supervisor: Boolean, maxPriorities: Int, address: BigInt = 0xC000000)(implicit val p: Parameters) extends LazyModule
+class TLPLIC(supervisor: Boolean, maxPriorities: Int, address: BigInt = 0xC000000)(implicit p: Parameters) extends LazyModule
 {
  val contextsPerHart = if (supervisor) 2 else 1
  require (maxPriorities >= 0)
--- a/src/main/scala/uncore/devices/Prci.scala
+++ b/src/main/scala/uncore/devices/Prci.scala
@ -32,8 +32,7 @@ object ClintConsts
 }

 trait MixCoreplexLocalInterrupterParameters {
-  val params: Parameters
-  implicit val p = params
+  implicit val p: Parameters
 }

 trait CoreplexLocalInterrupterBundle extends Bundle with MixCoreplexLocalInterrupterParameters {
@ -83,10 +82,10 @@ trait CoreplexLocalInterrupterModule extends Module with HasRegMap with MixCorep

 /** Power, Reset, Clock, Interrupt */
 // Magic TL2 Incantation to create a TL2 Slave
-class CoreplexLocalInterrupter(address: BigInt = 0x02000000)(implicit val p: Parameters)
-  extends TLRegisterRouter(address, size = ClintConsts.size, beatBytes = p(rocket.XLen)/8, undefZero = false)(
-  new TLRegBundle(p, _)    with CoreplexLocalInterrupterBundle)(
-  new TLRegModule(p, _, _) with CoreplexLocalInterrupterModule)
+class CoreplexLocalInterrupter(address: BigInt = 0x02000000)(implicit p: Parameters)
+  extends TLRegisterRouter(address, size = ClintConsts.size, beatBytes = p(rocket.XLen)/8, undefZero = true)(
+  new TLRegBundle((), _)    with CoreplexLocalInterrupterBundle)(
+  new TLRegModule((), _, _) with CoreplexLocalInterrupterModule)
 {
  val globalConfigString = Seq(
    s"rtc {\n",
--- a/src/main/scala/uncore/devices/Rom.scala
+++ b/src/main/scala/uncore/devices/Rom.scala
@ -12,7 +12,7 @@ import uncore.tilelink2._
 import uncore.util._
 import config._

-class TLROM(val base: BigInt, val size: Int, contentsDelayed: => Seq[Byte], executable: Boolean = true, beatBytes: Int = 4) extends LazyModule
+class TLROM(val base: BigInt, val size: Int, contentsDelayed: => Seq[Byte], executable: Boolean = true, beatBytes: Int = 4)(implicit p: Parameters) extends LazyModule
 {
  val node = TLManagerNode(beatBytes, TLManagerParameters(
    address     = List(AddressSet(base, size-1)),
--- a/src/main/scala/uncore/tilelink2/AtomicAutomata.scala
+++ b/src/main/scala/uncore/tilelink2/AtomicAutomata.scala
@ -4,12 +4,13 @@ package uncore.tilelink2

 import Chisel._
 import chisel3.internal.sourceinfo.SourceInfo
+import config._
 import diplomacy._
 import scala.math.{min,max}

 // Ensures that all downstream RW managers support Atomic operationss.
 // If !passthrough, intercept all Atomics. Otherwise, only intercept those unsupported downstream.
-class TLAtomicAutomata(logical: Boolean = true, arithmetic: Boolean = true, concurrency: Int = 1, passthrough: Boolean = true) extends LazyModule
+class TLAtomicAutomata(logical: Boolean = true, arithmetic: Boolean = true, concurrency: Int = 1, passthrough: Boolean = true)(implicit p: Parameters) extends LazyModule
 {
  require (concurrency >= 1)

@ -278,7 +279,7 @@ class TLAtomicAutomata(logical: Boolean = true, arithmetic: Boolean = true, conc
 object TLAtomicAutomata
 {
  // applied to the TL source node; y.node := TLAtomicAutomata(x.node)
-  def apply(logical: Boolean = true, arithmetic: Boolean = true, concurrency: Int = 1, passthrough: Boolean = true)(x: TLOutwardNode)(implicit sourceInfo: SourceInfo): TLOutwardNode = {
+  def apply(logical: Boolean = true, arithmetic: Boolean = true, concurrency: Int = 1, passthrough: Boolean = true)(x: TLOutwardNode)(implicit p: Parameters, sourceInfo: SourceInfo): TLOutwardNode = {
    val atomics = LazyModule(new TLAtomicAutomata(logical, arithmetic, concurrency, passthrough))
    atomics.node := x
    atomics.node
@ -290,7 +291,7 @@ import unittest._

 //TODO ensure handler will pass through operations to clients that can handle them themselves

-class TLRAMAtomicAutomata() extends LazyModule {
+class TLRAMAtomicAutomata()(implicit p: Parameters) extends LazyModule {
  val fuzz = LazyModule(new TLFuzzer(5000))
  val model = LazyModule(new TLRAMModel)
  val ram  = LazyModule(new TLRAM(AddressSet(0x0, 0x3ff)))
@ -303,6 +304,6 @@ class TLRAMAtomicAutomata() extends LazyModule {
  }
 }

-class TLRAMAtomicAutomataTest extends UnitTest(timeout = 500000) {
+class TLRAMAtomicAutomataTest(implicit p: Parameters) extends UnitTest(timeout = 500000) {
  io.finished := Module(LazyModule(new TLRAMAtomicAutomata).module).io.finished
 }
--- a/src/main/scala/uncore/tilelink2/Broadcast.scala
+++ b/src/main/scala/uncore/tilelink2/Broadcast.scala
@ -3,10 +3,11 @@
 package uncore.tilelink2

 import Chisel._
+import config._
 import diplomacy._
 import scala.math.{min,max}

-class TLBroadcast(lineBytes: Int, numTrackers: Int = 4, bufferless: Boolean = false) extends LazyModule
+class TLBroadcast(lineBytes: Int, numTrackers: Int = 4, bufferless: Boolean = false)(implicit p: Parameters) extends LazyModule
 {
  require (lineBytes > 0 && isPow2(lineBytes))
  require (numTrackers > 0)
@ -87,6 +88,8 @@ class TLBroadcast(lineBytes: Int, numTrackers: Int = 4, bufferless: Boolean = fa
    val d_normal = Wire(in.d)
    val d_trackerOH = Vec(trackers.map { t => !t.idle && t.source === d_normal.bits.source }).asUInt

+    assert (!out.d.valid || !d_drop || out.d.bits.opcode === TLMessages.AccessAck)
+
    out.d.ready := d_normal.ready || d_drop
    d_normal.valid := out.d.valid && !d_drop
    d_normal.bits := out.d.bits // truncates source
@ -102,6 +105,7 @@ class TLBroadcast(lineBytes: Int, numTrackers: Int = 4, bufferless: Boolean = fa
    val d_last = edgeIn.last(d_normal)
    (trackers zip d_trackerOH.toBools) foreach { case (tracker, select) =>
      tracker.d_last := select && d_normal.fire() && d_response && d_last
+      tracker.probedack := select && out.d.fire() && d_drop
    }

    // Incoming C can be:
@ -114,12 +118,12 @@ class TLBroadcast(lineBytes: Int, numTrackers: Int = 4, bufferless: Boolean = fa
    val c_probeackdata = in.c.bits.opcode === TLMessages.ProbeAckData
    val c_releasedata  = in.c.bits.opcode === TLMessages.ReleaseData
    val c_release      = in.c.bits.opcode === TLMessages.Release
+    val c_trackerOH    = trackers.map { t => t.line === (in.c.bits.address >> lineShift) }
+    val c_trackerSrc   = Mux1H(c_trackerOH, trackers.map { _.source })

    // Decrement the tracker's outstanding probe counter
-    val c_decrement = in.c.fire() && (c_probeack || c_probeackdata)
-    val c_last = edgeIn.last(in.c)
-    trackers foreach { tracker =>
-      tracker.probeack := c_decrement && c_last && tracker.line === (in.c.bits.address >> lineShift)
+    (trackers zip c_trackerOH) foreach { case (tracker, select) =>
+      tracker.probenack := in.c.fire() && c_probeack && select
    }

    val releaseack = Wire(in.d)
@ -131,8 +135,9 @@ class TLBroadcast(lineBytes: Int, numTrackers: Int = 4, bufferless: Boolean = fa
    releaseack.bits  := edgeIn.ReleaseAck(in.c.bits.address, UInt(0), in.c.bits.source, in.c.bits.size)

    val put_what = Mux(c_releasedata, TRANSFORM_B, DROP)
+    val put_who  = Mux(c_releasedata, in.c.bits.source, c_trackerSrc)
    putfull.valid := in.c.valid && (c_probeackdata || c_releasedata)
-    putfull.bits := edgeOut.Put(Cat(put_what, in.c.bits.source), in.c.bits.address, in.c.bits.size, in.c.bits.data)._2
+    putfull.bits := edgeOut.Put(Cat(put_what, put_who), in.c.bits.address, in.c.bits.size, in.c.bits.data)._2

    // Combine ReleaseAck or the modified D
    TLArbiter.lowest(edgeOut, in.d, releaseack, d_normal)
@ -207,7 +212,8 @@ class TLBroadcastTracker(id: Int, lineBytes: Int, probeCountBits: Int, bufferles
    val in_a  = Decoupled(new TLBundleA(edgeIn.bundle)).flip
    val out_a = Decoupled(new TLBundleA(edgeOut.bundle))
    val probe = UInt(INPUT, width = probeCountBits)
-    val probeack = Bool(INPUT)
+    val probenack = Bool(INPUT)
+    val probedack = Bool(INPUT)
    val d_last = Bool(INPUT)
    val e_last = Bool(INPUT)
    val source = UInt(OUTPUT) // the source awaiting D response
@ -246,9 +252,10 @@ class TLBroadcastTracker(id: Int, lineBytes: Int, probeCountBits: Int, bufferles
    assert (!idle)
    idle := Bool(true)
  }
-  when (io.probeack) {
+
+  when (io.probenack || io.probedack) {
    assert (count > UInt(0))
-    count := count - UInt(1)
+    count := count - Mux(io.probenack && io.probedack, UInt(2), UInt(1))
  }

  io.idle := idle
--- a/src/main/scala/uncore/tilelink2/Buffer.scala
+++ b/src/main/scala/uncore/tilelink2/Buffer.scala
@ -4,11 +4,12 @@ package uncore.tilelink2

 import Chisel._
 import chisel3.internal.sourceinfo.SourceInfo
+import config._
 import diplomacy._
 import scala.math.{min,max}

 // pipe is only used if a queue has depth = 1
-class TLBuffer(a: Int = 2, b: Int = 2, c: Int = 2, d: Int = 2, e: Int = 2, pipe: Boolean = true) extends LazyModule
+class TLBuffer(a: Int = 2, b: Int = 2, c: Int = 2, d: Int = 2, e: Int = 2, pipe: Boolean = true)(implicit p: Parameters) extends LazyModule
 {
  require (a >= 0)
  require (b >= 0)
@ -49,12 +50,12 @@ class TLBuffer(a: Int = 2, b: Int = 2, c: Int = 2, d: Int = 2, e: Int = 2, pipe:
 object TLBuffer
 {
  // applied to the TL source node; y.node := TLBuffer(x.node)
-  def apply()                                (x: TLOutwardNode)(implicit sourceInfo: SourceInfo): TLOutwardNode = apply(2)(x)
-  def apply(entries: Int)                    (x: TLOutwardNode)(implicit sourceInfo: SourceInfo): TLOutwardNode = apply(entries, true)(x)
-  def apply(entries: Int, pipe: Boolean)     (x: TLOutwardNode)(implicit sourceInfo: SourceInfo): TLOutwardNode = apply(entries, entries, pipe)(x)
-  def apply(ace: Int, bd: Int)               (x: TLOutwardNode)(implicit sourceInfo: SourceInfo): TLOutwardNode = apply(ace, bd, true)(x)
-  def apply(ace: Int, bd: Int, pipe: Boolean)(x: TLOutwardNode)(implicit sourceInfo: SourceInfo): TLOutwardNode = apply(ace, bd, ace, bd, ace, pipe)(x)
-  def apply(a: Int, b: Int, c: Int, d: Int, e: Int, pipe: Boolean = true)(x: TLOutwardNode)(implicit sourceInfo: SourceInfo): TLOutwardNode = {
+  def apply()                                (x: TLOutwardNode)(implicit p: Parameters, sourceInfo: SourceInfo): TLOutwardNode = apply(2)(x)
+  def apply(entries: Int)                    (x: TLOutwardNode)(implicit p: Parameters, sourceInfo: SourceInfo): TLOutwardNode = apply(entries, true)(x)
+  def apply(entries: Int, pipe: Boolean)     (x: TLOutwardNode)(implicit p: Parameters, sourceInfo: SourceInfo): TLOutwardNode = apply(entries, entries, pipe)(x)
+  def apply(ace: Int, bd: Int)               (x: TLOutwardNode)(implicit p: Parameters, sourceInfo: SourceInfo): TLOutwardNode = apply(ace, bd, true)(x)
+  def apply(ace: Int, bd: Int, pipe: Boolean)(x: TLOutwardNode)(implicit p: Parameters, sourceInfo: SourceInfo): TLOutwardNode = apply(ace, bd, ace, bd, ace, pipe)(x)
+  def apply(a: Int, b: Int, c: Int, d: Int, e: Int, pipe: Boolean = true)(x: TLOutwardNode)(implicit p: Parameters, sourceInfo: SourceInfo): TLOutwardNode = {
    val buffer = LazyModule(new TLBuffer(a, b, c, d, e, pipe))
    buffer.node := x
    buffer.node
--- a/src/main/scala/uncore/tilelink2/Crossing.scala
+++ b/src/main/scala/uncore/tilelink2/Crossing.scala
@ -4,10 +4,11 @@ package uncore.tilelink2

 import Chisel._
 import chisel3.internal.sourceinfo.SourceInfo
+import config._
 import diplomacy._
 import util._

-class TLAsyncCrossingSource(sync: Int = 3) extends LazyModule
+class TLAsyncCrossingSource(sync: Int = 3)(implicit p: Parameters) extends LazyModule
 {
  val node = TLAsyncSourceNode()

@ -41,7 +42,7 @@ class TLAsyncCrossingSource(sync: Int = 3) extends LazyModule
  }
 }

-class TLAsyncCrossingSink(depth: Int = 8, sync: Int = 3) extends LazyModule
+class TLAsyncCrossingSink(depth: Int = 8, sync: Int = 3)(implicit p: Parameters) extends LazyModule
 {
  val node = TLAsyncSinkNode(depth)

@ -77,7 +78,7 @@ class TLAsyncCrossingSink(depth: Int = 8, sync: Int = 3) extends LazyModule
 object TLAsyncCrossingSource
 {
  // applied to the TL source node; y.node := TLAsyncCrossingSource()(x.node)
-  def apply(sync: Int = 3)(x: TLOutwardNode)(implicit sourceInfo: SourceInfo): TLAsyncOutwardNode = {
+  def apply(sync: Int = 3)(x: TLOutwardNode)(implicit p: Parameters, sourceInfo: SourceInfo): TLAsyncOutwardNode = {
    val source = LazyModule(new TLAsyncCrossingSource(sync))
    source.node := x
    source.node
@ -87,14 +88,14 @@ object TLAsyncCrossingSource
 object TLAsyncCrossingSink
 {
  // applied to the TL source node; y.node := TLAsyncCrossingSink()(x.node)
-  def apply(depth: Int = 8, sync: Int = 3)(x: TLAsyncOutwardNode)(implicit sourceInfo: SourceInfo): TLOutwardNode = {
+  def apply(depth: Int = 8, sync: Int = 3)(x: TLAsyncOutwardNode)(implicit p: Parameters, sourceInfo: SourceInfo): TLOutwardNode = {
    val sink = LazyModule(new TLAsyncCrossingSink(depth, sync))
    sink.node := x
    sink.node
  }
 }

-class TLAsyncCrossing(depth: Int = 8, sync: Int = 3) extends LazyModule
+class TLAsyncCrossing(depth: Int = 8, sync: Int = 3)(implicit p: Parameters) extends LazyModule
 {
  val nodeIn = TLInputNode()
  val nodeOut = TLOutputNode()
@ -136,7 +137,7 @@ class TLAsyncCrossing(depth: Int = 8, sync: Int = 3) extends LazyModule
 /** Synthesizeable unit tests */
 import unittest._

-class TLRAMCrossing extends LazyModule {
+class TLRAMCrossing(implicit p: Parameters) extends LazyModule {
  val model = LazyModule(new TLRAMModel)
  val ram  = LazyModule(new TLRAM(AddressSet(0x0, 0x3ff)))
  val fuzz = LazyModule(new TLFuzzer(5000))
@ -167,6 +168,6 @@ class TLRAMCrossing extends LazyModule {
  }
 }

-class TLRAMCrossingTest extends UnitTest(timeout = 500000) {
+class TLRAMCrossingTest(implicit p: Parameters) extends UnitTest(timeout = 500000) {
  io.finished := Module(LazyModule(new TLRAMCrossing).module).io.finished
 }
--- a/src/main/scala/uncore/tilelink2/Example.scala
+++ b/src/main/scala/uncore/tilelink2/Example.scala
@ -3,6 +3,7 @@
 package uncore.tilelink2

 import Chisel._
+import config._
 import regmapper._

 case class ExampleParams(num: Int, address: BigInt)
@ -33,6 +34,6 @@ trait ExampleModule extends HasRegMap
 }

 // Create a concrete TL2 version of the abstract Example slave
-class TLExample(p: ExampleParams) extends TLRegisterRouter(p.address, 4)(
-  new TLRegBundle(p, _)    with ExampleBundle)(
-  new TLRegModule(p, _, _) with ExampleModule)
+class TLExample(params: ExampleParams)(implicit p: Parameters) extends TLRegisterRouter(params.address, 4)(
+  new TLRegBundle(params, _)    with ExampleBundle)(
+  new TLRegModule(params, _, _) with ExampleModule)
--- a/src/main/scala/uncore/tilelink2/Filter.scala
+++ b/src/main/scala/uncore/tilelink2/Filter.scala
@ -4,10 +4,11 @@ package uncore.tilelink2

 import Chisel._
 import chisel3.internal.sourceinfo.SourceInfo
+import config._
 import diplomacy._
 import scala.math.{min,max}

-class TLFilter(select: AddressSet) extends LazyModule
+class TLFilter(select: AddressSet)(implicit p: Parameters) extends LazyModule
 {
  val node = TLAdapterNode(
    clientFn  = { case Seq(cp) => cp },
@ -44,7 +45,7 @@ class TLFilter(select: AddressSet) extends LazyModule
 object TLFilter
 {
  // applied to the TL source node; y.node := TLBuffer(x.node)
-  def apply(select: AddressSet)(x: TLOutwardNode)(implicit sourceInfo: SourceInfo): TLOutwardNode = {
+  def apply(select: AddressSet)(x: TLOutwardNode)(implicit p: Parameters, sourceInfo: SourceInfo): TLOutwardNode = {
    val filter = LazyModule(new TLFilter(select))
    filter.node := x
    filter.node
--- a/src/main/scala/uncore/tilelink2/Fragmenter.scala
+++ b/src/main/scala/uncore/tilelink2/Fragmenter.scala
@ -4,6 +4,7 @@ package uncore.tilelink2

 import Chisel._
 import chisel3.internal.sourceinfo.SourceInfo
+import config._
 import diplomacy._
 import scala.math.{min,max}

@ -13,7 +14,7 @@ import scala.math.{min,max}
 // Fragmenter modifies: PutFull, PutPartial, LogicalData, Get, Hint
 // Fragmenter passes: ArithmeticData (truncated to minSize if alwaysMin)
 // Fragmenter cannot modify acquire (could livelock); thus it is unsafe to put caches on both sides
-class TLFragmenter(val minSize: Int, val maxSize: Int, val alwaysMin: Boolean = false) extends LazyModule
+class TLFragmenter(val minSize: Int, val maxSize: Int, val alwaysMin: Boolean = false)(implicit p: Parameters) extends LazyModule
 {
  require (isPow2 (maxSize))
  require (isPow2 (minSize))
@ -253,7 +254,7 @@ class TLFragmenter(val minSize: Int, val maxSize: Int, val alwaysMin: Boolean =
 object TLFragmenter
 {
  // applied to the TL source node; y.node := TLFragmenter(x.node, 256, 4)
-  def apply(minSize: Int, maxSize: Int, alwaysMin: Boolean = false)(x: TLOutwardNode)(implicit sourceInfo: SourceInfo): TLOutwardNode = {
+  def apply(minSize: Int, maxSize: Int, alwaysMin: Boolean = false)(x: TLOutwardNode)(implicit p: Parameters, sourceInfo: SourceInfo): TLOutwardNode = {
    val fragmenter = LazyModule(new TLFragmenter(minSize, maxSize, alwaysMin))
    fragmenter.node := x
    fragmenter.node
@ -263,7 +264,7 @@ object TLFragmenter
 /** Synthesizeable unit tests */
 import unittest._

-class TLRAMFragmenter(ramBeatBytes: Int, maxSize: Int) extends LazyModule {
+class TLRAMFragmenter(ramBeatBytes: Int, maxSize: Int)(implicit p: Parameters) extends LazyModule {
  val fuzz = LazyModule(new TLFuzzer(5000))
  val model = LazyModule(new TLRAMModel)
  val ram  = LazyModule(new TLRAM(AddressSet(0x0, 0x3ff), beatBytes = ramBeatBytes))
@ -276,6 +277,6 @@ class TLRAMFragmenter(ramBeatBytes: Int, maxSize: Int) extends LazyModule {
  }
 }

-class TLRAMFragmenterTest(ramBeatBytes: Int, maxSize: Int) extends UnitTest(timeout = 500000) {
+class TLRAMFragmenterTest(ramBeatBytes: Int, maxSize: Int)(implicit p: Parameters) extends UnitTest(timeout = 500000) {
  io.finished := Module(LazyModule(new TLRAMFragmenter(ramBeatBytes,maxSize)).module).io.finished
 }
--- a/src/main/scala/uncore/tilelink2/Fuzzer.scala
+++ b/src/main/scala/uncore/tilelink2/Fuzzer.scala
@ -3,6 +3,7 @@
 package uncore.tilelink2

 import Chisel._
+import config._
 import diplomacy._

 class IDMapGenerator(numIds: Int) extends Module {
@ -85,7 +86,7 @@ class TLFuzzer(
                  (wide: Int, increment: Bool, abs_values: Int) =>
                   LFSRNoiseMaker(wide=wide, increment=increment)
                  }
-              ) extends LazyModule
+              )(implicit p: Parameters) extends LazyModule
 {
  val node = TLClientNode(TLClientParameters(sourceId = IdRange(0,inFlight)))

@ -213,7 +214,7 @@ class TLFuzzer(
 /** Synthesizeable integration test */
 import unittest._

-class TLFuzzRAM extends LazyModule
+class TLFuzzRAM()(implicit p: Parameters) extends LazyModule
 {
  val model = LazyModule(new TLRAMModel("TLFuzzRAM"))
  val ram  = LazyModule(new TLRAM(AddressSet(0x800, 0x7ff)))
@ -253,7 +254,7 @@ class TLFuzzRAM extends LazyModule
  }
 }

-class TLFuzzRAMTest extends UnitTest(500000) {
+class TLFuzzRAMTest()(implicit p: Parameters) extends UnitTest(500000) {
  val dut = Module(LazyModule(new TLFuzzRAM).module)
  io.finished := dut.io.finished
 }
--- a/src/main/scala/uncore/tilelink2/HintHandler.scala
+++ b/src/main/scala/uncore/tilelink2/HintHandler.scala
@ -5,10 +5,11 @@ package uncore.tilelink2
 import scala.math.min
 import Chisel._
 import chisel3.internal.sourceinfo.SourceInfo
+import config._
 import diplomacy._

 // Acks Hints for managers that don't support them or Acks all Hints if !passthrough
-class TLHintHandler(supportManagers: Boolean = true, supportClients: Boolean = false, passthrough: Boolean = true) extends LazyModule
+class TLHintHandler(supportManagers: Boolean = true, supportClients: Boolean = false, passthrough: Boolean = true)(implicit p: Parameters) extends LazyModule
 {
  val node = TLAdapterNode(
    clientFn  = { case Seq(c) => if (!supportClients)  c else c.copy(minLatency = min(1, c.minLatency), clients  = c.clients .map(_.copy(supportsHint = TransferSizes(1, c.maxTransfer)))) },
@ -100,7 +101,7 @@ class TLHintHandler(supportManagers: Boolean = true, supportClients: Boolean = f
 object TLHintHandler
 {
  // applied to the TL source node; y.node := TLHintHandler(x.node)
-  def apply(supportManagers: Boolean = true, supportClients: Boolean = false, passthrough: Boolean = true)(x: TLOutwardNode)(implicit sourceInfo: SourceInfo): TLOutwardNode = {
+  def apply(supportManagers: Boolean = true, supportClients: Boolean = false, passthrough: Boolean = true)(x: TLOutwardNode)(implicit p: Parameters, sourceInfo: SourceInfo): TLOutwardNode = {
    val hints = LazyModule(new TLHintHandler(supportManagers, supportClients, passthrough))
    hints.node := x
    hints.node
@ -112,7 +113,7 @@ import unittest._

 //TODO ensure handler will pass through hints to clients that can handle them themselves

-class TLRAMHintHandler() extends LazyModule {
+class TLRAMHintHandler()(implicit p: Parameters) extends LazyModule {
  val fuzz = LazyModule(new TLFuzzer(5000))
  val model = LazyModule(new TLRAMModel)
  val ram  = LazyModule(new TLRAM(AddressSet(0x0, 0x3ff)))
@ -125,6 +126,6 @@ class TLRAMHintHandler() extends LazyModule {
  }
 }

-class TLRAMHintHandlerTest extends UnitTest(timeout = 500000) {
+class TLRAMHintHandlerTest()(implicit p: Parameters) extends UnitTest(timeout = 500000) {
  io.finished := Module(LazyModule(new TLRAMHintHandler).module).io.finished
 }
--- a/src/main/scala/uncore/tilelink2/IntNodes.scala
+++ b/src/main/scala/uncore/tilelink2/IntNodes.scala
@ -4,6 +4,7 @@ package uncore.tilelink2

 import Chisel._
 import chisel3.internal.sourceinfo.SourceInfo
+import config._
 import diplomacy._
 import scala.collection.mutable.ListBuffer
 import scala.math.max
@ -65,7 +66,7 @@ object IntImp extends NodeImp[IntSourcePortParameters, IntSinkPortParameters, In
  override def labelI(ei: IntEdge) = ei.source.sources.map(_.range.size).sum.toString
  override def labelO(eo: IntEdge) = eo.source.sources.map(_.range.size).sum.toString

-  def connect(bo: => Vec[Bool], bi: => Vec[Bool], ei: => IntEdge)(implicit sourceInfo: SourceInfo): (Option[LazyModule], () => Unit) = {
+  def connect(bo: => Vec[Bool], bi: => Vec[Bool], ei: => IntEdge)(implicit p: Parameters, sourceInfo: SourceInfo): (Option[LazyModule], () => Unit) = {
    (None, () => {
      // Cannot use bulk connect, because the widths could differ
      (bo zip bi) foreach { case (o, i) => i := o }
@ -100,7 +101,7 @@ case class IntBlindInputNode(num: Int) extends BlindInputNode(IntImp)(IntSourceP
 case class IntInternalOutputNode() extends InternalOutputNode(IntImp)(IntSinkPortParameters(Seq(IntSinkParameters())))
 case class IntInternalInputNode(num: Int) extends InternalInputNode(IntImp)(IntSourcePortParameters(Seq(IntSourceParameters(num))))

-class IntXbar extends LazyModule
+class IntXbar()(implicit p: Parameters) extends LazyModule
 {
  val intnode = IntAdapterNode(
    numSourcePorts = 0 to 128,
@ -123,7 +124,7 @@ class IntXbar extends LazyModule
  }
 }

-class IntXing extends LazyModule
+class IntXing()(implicit p: Parameters) extends LazyModule
 {
  val intnode = IntIdentityNode()

--- a/src/main/scala/uncore/tilelink2/Isolation.scala
+++ b/src/main/scala/uncore/tilelink2/Isolation.scala
@ -4,11 +4,12 @@ package uncore.tilelink2

 import Chisel._
 import chisel3.internal.sourceinfo.SourceInfo
+import config._
 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
+class TLIsolation(fOut: (Bool, UInt) => UInt, fIn: (Bool, UInt) => UInt)(implicit p: Parameters) extends LazyModule
 {
  val node = TLAsyncIdentityNode()

@ -76,7 +77,7 @@ object TLIsolation
  // fOut is applied to data flowing from client to manager
  // fIn  is applied to data flowing from manager to client
  // **** WARNING: the isolation functions must bring the values to 0 ****
-  def apply(fOut: (Bool, UInt) => UInt, fIn: (Bool, UInt) => UInt)(x: TLAsyncOutwardNode)(implicit sourceInfo: SourceInfo): (TLAsyncOutwardNode, () => (Bool, Bool)) = {
+  def apply(fOut: (Bool, UInt) => UInt, fIn: (Bool, UInt) => UInt)(x: TLAsyncOutwardNode)(implicit p: Parameters, sourceInfo: SourceInfo): (TLAsyncOutwardNode, () => (Bool, Bool)) = {
    val iso = LazyModule(new TLIsolation(fOut, fIn))
    iso.node := x
    (iso.node, () => (iso.module.io.iso_out, iso.module.io.iso_in))
--- a/src/main/scala/uncore/tilelink2/Legacy.scala
+++ b/src/main/scala/uncore/tilelink2/Legacy.scala
@ -8,19 +8,15 @@ import config._
 import uncore.tilelink._
 import uncore.constants._

-// Instantiate 'val p' before HasTileLinkParameters tries to use it
-abstract class LegacyLazyModuleImp(module: LazyModule)(implicit val p: Parameters)
-  extends LazyModuleImp(module) with HasTileLinkParameters
-
-class TLLegacy(implicit val p: Parameters) extends LazyModule with HasTileLinkParameters
+class TLLegacy(implicit p: Parameters) extends LazyModule with HasTileLinkParameters
 {
  // TL legacy clients don't support anything fancy
  val node = TLClientNode(TLClientParameters(
    sourceId = IdRange(0, 1 << tlClientXactIdBits)))

-  lazy val module = new LegacyLazyModuleImp(this) {
+  lazy val module = new LazyModuleImp(this) with HasTileLinkParameters {
    val io = new Bundle {
-      val legacy = new ClientUncachedTileLinkIO()(p).flip
+      val legacy = new ClientUncachedTileLinkIO().flip
      val out = node.bundleOut
    }

--- a/src/main/scala/uncore/tilelink2/Monitor.scala
+++ b/src/main/scala/uncore/tilelink2/Monitor.scala
@ -4,9 +4,31 @@ package uncore.tilelink2

 import Chisel._
 import chisel3.internal.sourceinfo.{SourceInfo, SourceLine}
+import config._
 import diplomacy._

-class TLMonitor(gen: () => TLBundleSnoop, edge: () => TLEdge, sourceInfo: SourceInfo) extends LazyModule
+case class TLMonitorArgs(gen: () => TLBundleSnoop, edge: () => TLEdge, sourceInfo: SourceInfo, p: Parameters)
+
+abstract class TLMonitorBase(args: TLMonitorArgs) extends LazyModule()(args.p)
+{
+  implicit val sourceInfo = args.sourceInfo
+
+  def legalize(bundle: TLBundleSnoop, edge: TLEdge): Unit
+
+  var code_insertion = (bundle_monitor: TLBundleSnoop, edge: TLEdge) => {}
+  
+  lazy val module = new LazyModuleImp(this) {
+    val io = new Bundle {
+      val in = args.gen().asInput
+    }
+
+    code_insertion(io.in, edge())
+
+    legalize(io.in, args.edge())
+  }
+}
+
+class TLMonitor(args: TLMonitorArgs) extends TLMonitorBase(args)
 {
  def extra(implicit sourceInfo: SourceInfo) = {
    sourceInfo match {
@ -409,21 +431,9 @@ class TLMonitor(gen: () => TLBundleSnoop, edge: () => TLEdge, sourceInfo: Source
    inflight := (inflight | a_set) & ~d_clr
  }

-  def legalize(bundle: TLBundleSnoop, edge: TLEdge)(implicit sourceInfo: SourceInfo) {
-    legalizeFormat     (bundle, edge)
-    legalizeMultibeat  (bundle, edge)
+  def legalize(bundle: TLBundleSnoop, edge: TLEdge) {
+    legalizeFormat      (bundle, edge)
+    legalizeMultibeat   (bundle, edge)
    legalizeSourceUnique(bundle, edge)
  }
-
-  var code_insertion = (bundle_monitor: TLBundleSnoop, edge: TLEdge) => {}
-  
-  lazy val module = new LazyModuleImp(this) {
-    val io = new Bundle {
-      val in = gen().asInput
-    }
-
-    code_insertion(io.in, edge())
-    
-    legalize(io.in, edge())(sourceInfo)
-  }
 }
--- a/src/main/scala/uncore/tilelink2/Nodes.scala
+++ b/src/main/scala/uncore/tilelink2/Nodes.scala
@ -4,9 +4,14 @@ package uncore.tilelink2

 import Chisel._
 import chisel3.internal.sourceinfo.SourceInfo
+import config._
 import diplomacy._
 import scala.collection.mutable.ListBuffer

+case object TLMonitorBuilder extends Field[TLMonitorArgs => Option[TLMonitorBase]]
+case object TLFuzzReadyValid extends Field[Boolean]
+case object TLCombinationalCheck extends Field[Boolean]
+
 object TLImp extends NodeImp[TLClientPortParameters, TLManagerPortParameters, TLEdgeOut, TLEdgeIn, TLBundle]
 {
  def edgeO(pd: TLClientPortParameters, pu: TLManagerPortParameters): TLEdgeOut = new TLEdgeOut(pd, pu)
@ -20,24 +25,16 @@ object TLImp extends NodeImp[TLClientPortParameters, TLManagerPortParameters, TL
    Vec(ei.size, TLBundle(ei.map(_.bundle).reduce(_.union(_))))
  }

-  var emitMonitors = true
-  var stressTestDecoupled = false
-  var combinationalCheck = false
-
  def colour = "#000000" // black
  override def labelI(ei: TLEdgeIn)  = (ei.manager.beatBytes * 8).toString
  override def labelO(eo: TLEdgeOut) = (eo.manager.beatBytes * 8).toString

-  def connect(bo: => TLBundle, bi: => TLBundle, ei: => TLEdgeIn)(implicit sourceInfo: SourceInfo): (Option[LazyModule], () => Unit) = {
-    val monitor = if (emitMonitors) {
-      Some(LazyModule(new TLMonitor(() => new TLBundleSnoop(bo.params), () => ei, sourceInfo)))
-    } else {
-      None
-    }
+  def connect(bo: => TLBundle, bi: => TLBundle, ei: => TLEdgeIn)(implicit p: Parameters, sourceInfo: SourceInfo): (Option[LazyModule], () => Unit) = {
+    val monitor = p(TLMonitorBuilder)(TLMonitorArgs(() => new TLBundleSnoop(bo.params), () => ei, sourceInfo, p))
    (monitor, () => {
      bi <> bo
      monitor.foreach { _.module.io.in := TLBundleSnoop(bo) }
-      if (combinationalCheck) {
+      if (p(TLCombinationalCheck)) {
        // It is forbidden for valid to depend on ready in TL2
        // If someone did that, then this will create a detectable combinational loop
        bo.a.ready := bi.a.ready && bo.a.valid
@ -46,7 +43,7 @@ object TLImp extends NodeImp[TLClientPortParameters, TLManagerPortParameters, TL
        bi.d.ready := bo.d.ready && bi.d.valid
        bo.e.ready := bi.e.ready && bo.e.valid
      }
-      if (stressTestDecoupled) {
+      if (p(TLCombinationalCheck)) {
        // Randomly stall the transfers
        val allow = LFSRNoiseMaker(5)
        bi.a.valid := bo.a.valid && allow(0)
@ -132,7 +129,7 @@ case class TLInternalInputNode(portParams: TLClientPortParameters) extends Inter
 /** Synthesizeable unit tests */
 import unittest._

-class TLInputNodeTest extends UnitTest(500000) {
+class TLInputNodeTest()(implicit p: Parameters) extends UnitTest(500000) {
  class Acceptor extends LazyModule {
    val node = TLInputNode()
    val tlram = LazyModule(new TLRAM(AddressSet(0x54321000, 0xfff)))
@ -168,7 +165,7 @@ object TLAsyncImp extends NodeImp[TLAsyncClientPortParameters, TLAsyncManagerPor
  override def labelI(ei: TLAsyncEdgeParameters) = ei.manager.depth.toString
  override def labelO(eo: TLAsyncEdgeParameters) = eo.manager.depth.toString

-  def connect(bo: => TLAsyncBundle, bi: => TLAsyncBundle, ei: => TLAsyncEdgeParameters)(implicit sourceInfo: SourceInfo): (Option[LazyModule], () => Unit) = {
+  def connect(bo: => TLAsyncBundle, bi: => TLAsyncBundle, ei: => TLAsyncEdgeParameters)(implicit p: Parameters, sourceInfo: SourceInfo): (Option[LazyModule], () => Unit) = {
    (None, () => { bi <> bo })
  }

--- a/src/main/scala/uncore/tilelink2/RAMModel.scala
+++ b/src/main/scala/uncore/tilelink2/RAMModel.scala
@ -3,6 +3,7 @@
 package uncore.tilelink2

 import Chisel._
+import config._
 import diplomacy._

 // We detect concurrent puts that put memory into an undefined state.
@ -20,7 +21,7 @@ import diplomacy._
 // put, get, getAck, putAck => ok: detected by getAck (it sees busy>0)		impossible for FIFO
 // If FIFO, the getAck should check data even if its validity was wiped

-class TLRAMModel(log: String = "") extends LazyModule
+class TLRAMModel(log: String = "")(implicit p: Parameters) extends LazyModule
 {
  val node = TLIdentityNode()

--- a/src/main/scala/uncore/tilelink2/RegisterRouter.scala
+++ b/src/main/scala/uncore/tilelink2/RegisterRouter.scala
@ -3,6 +3,7 @@
 package uncore.tilelink2

 import Chisel._
+import config._
 import diplomacy._
 import regmapper._
 import scala.math.{min,max}
@ -79,21 +80,22 @@ object TLRegisterNode
 // register mapped device from a totally abstract register mapped device.
 // See GPIO.scala in this directory for an example

-abstract class TLRegisterRouterBase(val address: AddressSet, interrupts: Int, concurrency: Int, beatBytes: Int, undefZero: Boolean, executable: Boolean) extends LazyModule
+abstract class TLRegisterRouterBase(val address: AddressSet, interrupts: Int, concurrency: Int, beatBytes: Int, undefZero: Boolean, executable: Boolean)(implicit p: Parameters) extends LazyModule
 {
  val node = TLRegisterNode(address, concurrency, beatBytes, undefZero, executable)
  val intnode = IntSourceNode(interrupts)
 }

-case class TLRegBundleArg(interrupts: Vec[Vec[Bool]], in: Vec[TLBundle])
+case class TLRegBundleArg(interrupts: Vec[Vec[Bool]], in: Vec[TLBundle])(implicit val p: Parameters)

 class TLRegBundleBase(arg: TLRegBundleArg) extends Bundle
 {
+  implicit val p = arg.p
  val interrupts = arg.interrupts
  val in = arg.in
 }

-class TLRegBundle[P](val params: P, arg: TLRegBundleArg) extends TLRegBundleBase(arg)
+class TLRegBundle[P](val params: P, arg: TLRegBundleArg)(implicit p: Parameters) extends TLRegBundleBase(arg)

 class TLRegModule[P, B <: TLRegBundleBase](val params: P, bundleBuilder: => B, router: TLRegisterRouterBase)
  extends LazyModuleImp(router) with HasRegMap
@ -107,7 +109,7 @@ class TLRegModule[P, B <: TLRegBundleBase](val params: P, bundleBuilder: => B, r
 class TLRegisterRouter[B <: TLRegBundleBase, M <: LazyModuleImp]
   (val base: BigInt, val interrupts: Int = 0, val size: BigInt = 4096, val concurrency: Int = 0, val beatBytes: Int = 4, undefZero: Boolean = true, executable: Boolean = false)
   (bundleBuilder: TLRegBundleArg => B)
-   (moduleBuilder: (=> B, TLRegisterRouterBase) => M)
+   (moduleBuilder: (=> B, TLRegisterRouterBase) => M)(implicit p: Parameters)
  extends TLRegisterRouterBase(AddressSet(base, size-1), interrupts, concurrency, beatBytes, undefZero, executable)
 {
  require (isPow2(size))
--- a/src/main/scala/uncore/tilelink2/RegisterRouterTest.scala
+++ b/src/main/scala/uncore/tilelink2/RegisterRouterTest.scala
@ -3,6 +3,7 @@
 package uncore.tilelink2

 import Chisel._
+import config._
 import diplomacy._
 import regmapper._
 import unittest._
@ -213,7 +214,7 @@ trait RRTest0Module extends HasRegMap
  regmap(RRTest0Map.map:_*)
 }

-class RRTest0(address: BigInt) extends TLRegisterRouter(address, 0, 32, 0, 4)(
+class RRTest0(address: BigInt)(implicit p: Parameters) extends TLRegisterRouter(address, 0, 32, 0, 4)(
  new TLRegBundle((), _)    with RRTest0Bundle)(
  new TLRegModule((), _, _) with RRTest0Module)

@ -250,11 +251,11 @@ trait RRTest1Module extends Module with HasRegMap
  regmap(map:_*)
 }

-class RRTest1(address: BigInt) extends TLRegisterRouter(address, 0, 32, 6, 4)(
+class RRTest1(address: BigInt)(implicit p: Parameters) extends TLRegisterRouter(address, 0, 32, 6, 4)(
  new TLRegBundle((), _)    with RRTest1Bundle)(
  new TLRegModule((), _, _) with RRTest1Module)

-class FuzzRRTest0 extends LazyModule {
+class FuzzRRTest0()(implicit p: Parameters) extends LazyModule {
  val fuzz = LazyModule(new TLFuzzer(5000))
  val rrtr = LazyModule(new RRTest0(0x400))

@ -265,11 +266,11 @@ class FuzzRRTest0 extends LazyModule {
  }
 }

-class TLRR0Test extends UnitTest(timeout = 500000) {
+class TLRR0Test()(implicit p: Parameters) extends UnitTest(timeout = 500000) {
  io.finished := Module(LazyModule(new FuzzRRTest0).module).io.finished
 }

-class FuzzRRTest1 extends LazyModule {
+class FuzzRRTest1()(implicit p: Parameters) extends LazyModule {
  val fuzz = LazyModule(new TLFuzzer(5000))
  val rrtr = LazyModule(new RRTest1(0x400))

@ -280,7 +281,7 @@ class FuzzRRTest1 extends LazyModule {
  }
 }

-class TLRR1Test extends UnitTest(timeout = 500000) {
+class TLRR1Test()(implicit p: Parameters) extends UnitTest(timeout = 500000) {
  io.finished := Module(LazyModule(new FuzzRRTest1).module).io.finished
 }

--- a/src/main/scala/uncore/tilelink2/SRAM.scala
+++ b/src/main/scala/uncore/tilelink2/SRAM.scala
@ -3,9 +3,10 @@
 package uncore.tilelink2

 import Chisel._
+import config._
 import diplomacy._

-class TLRAM(address: AddressSet, executable: Boolean = true, beatBytes: Int = 4) extends LazyModule
+class TLRAM(address: AddressSet, executable: Boolean = true, beatBytes: Int = 4)(implicit p: Parameters) extends LazyModule
 {
  val node = TLManagerNode(TLManagerPortParameters(
    Seq(TLManagerParameters(
@ -84,7 +85,7 @@ class TLRAM(address: AddressSet, executable: Boolean = true, beatBytes: Int = 4)
 /** Synthesizeable unit testing */
 import unittest._

-class TLRAMSimple(ramBeatBytes: Int) extends LazyModule {
+class TLRAMSimple(ramBeatBytes: Int)(implicit p: Parameters) extends LazyModule {
  val fuzz = LazyModule(new TLFuzzer(5000))
  val model = LazyModule(new TLRAMModel)
  val ram  = LazyModule(new TLRAM(AddressSet(0x0, 0x3ff), beatBytes = ramBeatBytes))
@ -97,6 +98,6 @@ class TLRAMSimple(ramBeatBytes: Int) extends LazyModule {
  }
 }

-class TLRAMSimpleTest(ramBeatBytes: Int) extends UnitTest(timeout = 500000) {
+class TLRAMSimpleTest(ramBeatBytes: Int)(implicit p: Parameters) extends UnitTest(timeout = 500000) {
  io.finished := Module(LazyModule(new TLRAMSimple(ramBeatBytes)).module).io.finished
 }
--- a/src/main/scala/uncore/tilelink2/SourceShrinker.scala
+++ b/src/main/scala/uncore/tilelink2/SourceShrinker.scala
@ -4,10 +4,11 @@ package uncore.tilelink2

 import Chisel._
 import chisel3.internal.sourceinfo.SourceInfo
+import config._
 import diplomacy._
 import scala.math.{min,max}

-class TLSourceShrinker(maxInFlight: Int) extends LazyModule
+class TLSourceShrinker(maxInFlight: Int)(implicit p: Parameters) extends LazyModule
 {
  require (maxInFlight > 0)

@ -78,7 +79,7 @@ class TLSourceShrinker(maxInFlight: Int) extends LazyModule
 object TLSourceShrinker
 {
  // applied to the TL source node; y.node := TLSourceShrinker(n)(x.node)
-  def apply(maxInFlight: Int)(x: TLOutwardNode)(implicit sourceInfo: SourceInfo): TLOutwardNode = {
+  def apply(maxInFlight: Int)(x: TLOutwardNode)(implicit p: Parameters, sourceInfo: SourceInfo): TLOutwardNode = {
    val shrinker = LazyModule(new TLSourceShrinker(maxInFlight))
    shrinker.node := x
    shrinker.node
--- a/src/main/scala/uncore/tilelink2/ToAHB.scala
+++ b/src/main/scala/uncore/tilelink2/ToAHB.scala
@ -0,0 +1,141 @@
+// See LICENSE.SiFive for license details.
+
+package uncore.tilelink2
+
+import Chisel._
+import chisel3.internal.sourceinfo.SourceInfo
+import config._
+import diplomacy._
+import util.PositionalMultiQueue
+import uncore.ahb._
+import scala.math.{min, max}
+import AHBParameters._
+
+case class TLToAHBNode() extends MixedNode(TLImp, AHBImp)(
+  dFn = { case (1, Seq(TLClientPortParameters(clients, unsafeAtomics, minLatency))) =>
+    val masters = clients.map { case c => AHBMasterParameters(nodePath = c.nodePath) }
+    Seq(AHBMasterPortParameters(masters))
+  },
+  uFn = { case (1, Seq(AHBSlavePortParameters(slaves, beatBytes))) =>
+    val managers = slaves.map { case s =>
+      TLManagerParameters(
+        address            = s.address,
+        regionType         = s.regionType,
+        executable         = s.executable,
+        nodePath           = s.nodePath,
+        supportsGet        = s.supportsRead,
+        supportsPutFull    = s.supportsWrite, // but not PutPartial
+        fifoId             = Some(0)) // a common FIFO domain
+    }
+    Seq(TLManagerPortParameters(managers, beatBytes, 1, 1))
+  },
+  numPO = 1 to 1,
+  numPI = 1 to 1)
+
+class TLToAHB(combinational: Boolean = true)(implicit p: Parameters) extends LazyModule
+{
+  val node = TLToAHBNode()
+
+  lazy val module = new LazyModuleImp(this) {
+    val io = new Bundle {
+      val in = node.bundleIn
+      val out = node.bundleOut
+    }
+
+    val in = io.in(0)
+    val out = io.out(0)
+    val edgeIn  = node.edgesIn(0)
+    val edgeOut = node.edgesOut(0)
+    val beatBytes = edgeOut.slave.beatBytes
+    val maxTransfer = edgeOut.slave.maxTransfer
+    val lgMax = log2Ceil(maxTransfer)
+    val lgBytes = log2Ceil(beatBytes)
+
+    // AHB has no cache coherence
+    in.b.valid := Bool(false)
+    in.c.ready := Bool(true)
+    in.e.ready := Bool(true)
+
+    // We need a skidpad to capture D output:
+    // We cannot know if the D response will be accepted until we have
+    // presented it on D as valid.  We also can't back-pressure AHB in the
+    // data phase.  Therefore, we must have enough space to save the data
+    // phase result.  Whenever we have a queued response, we can not allow
+    // AHB to present new responses, so we must quash the address phase.
+    val d = Wire(in.d)
+    in.d <> Queue(d, 1, flow = true)
+    val a_quash = in.d.valid && !in.d.ready
+
+    // Record what is coming out in d_phase
+    val d_valid   = RegInit(Bool(false))
+    val d_hasData = Reg(Bool())
+    val d_error   = Reg(Bool())
+    val d_addr_lo = Reg(UInt(width = lgBytes))
+    val d_source  = Reg(UInt())
+    val d_size    = Reg(UInt())
+
+    when (out.hreadyout) { d_error := d_error || out.hresp }
+    when (d.fire()) { d_valid := Bool(false) }
+
+    d.valid := d_valid && out.hreadyout
+    d.bits  := edgeIn.AccessAck(d_addr_lo, UInt(0), d_source, d_size, out.hrdata, out.hresp || d_error)
+    d.bits.opcode := Mux(d_hasData, TLMessages.AccessAckData, TLMessages.AccessAck)
+
+    // We need an irrevocable input for AHB to stall on read bursts
+    // We also need the values to NOT change when valid goes low => 1 entry only
+    val a = Queue(in.a, 1, flow = combinational, pipe = !combinational)
+    val a_valid = a.valid && !a_quash
+
+    // This is lot like TLEdge.firstlast, but counts beats also for single-beat TL types
+    val a_size = edgeIn.size(a.bits)
+    val a_beats1 = UIntToOH1(a_size, lgMax) >> lgBytes
+    val a_counter = RegInit(UInt(0, width = log2Up(maxTransfer/beatBytes)))
+    val a_counter1 = a_counter - UInt(1)
+    val a_first = a_counter === UInt(0)
+    val a_last = a_counter === UInt(1) || a_beats1 === UInt(0)
+    val a_offset = (a_beats1 & ~a_counter1) << lgBytes
+    val a_hasData = edgeIn.hasData(a.bits)
+
+    // Expand no-data A-channel requests into multiple beats
+    a.ready := (a_hasData || a_last) && out.hreadyout && !a_quash
+    when (a_valid && out.hreadyout) {
+      a_counter := Mux(a_first, a_beats1, a_counter1)
+      d_valid := !a_hasData || a_last
+      // Record what will be in the data phase
+      when (a_first) {
+        d_hasData := !a_hasData
+        d_error   := Bool(false)
+        d_addr_lo := a.bits.address
+        d_source  := a.bits.source
+        d_size    := a.bits.size
+      }
+    }
+
+    // Transform TL size into AHB hsize+hburst
+    val a_size_bits = a_size.getWidth
+    val a_sizeDelta = Cat(UInt(0, width = 1), a_size) - UInt(lgBytes+1)
+    val a_singleBeat = a_sizeDelta(a_size_bits)
+    val a_logBeats1 = a_sizeDelta(a_size_bits-1, 0)
+
+    out.hmastlock := Bool(false) // for now
+    out.htrans    := Mux(a_valid, Mux(a_first, TRANS_NONSEQ, TRANS_SEQ), Mux(a_first, TRANS_IDLE, TRANS_BUSY))
+    out.hsel      := Bool(true)
+    out.hready    := out.hreadyout
+    out.hwrite    := a_hasData
+    out.haddr     := a.bits.address | a_offset
+    out.hsize     := Mux(a_singleBeat, a.bits.size, UInt(lgBytes))
+    out.hburst    := Mux(a_singleBeat, BURST_SINGLE, (a_logBeats1<<1) | UInt(1))
+    out.hprot     := PROT_DEFAULT
+    out.hwdata    := RegEnable(a.bits.data, a.fire())
+  }
+}
+
+object TLToAHB
+{
+  // applied to the TL source node; y.node := TLToAHB()(x.node)
+  def apply(combinational: Boolean = true)(x: TLOutwardNode)(implicit p: Parameters, sourceInfo: SourceInfo): AHBOutwardNode = {
+    val axi4 = LazyModule(new TLToAHB(combinational))
+    axi4.node := x
+    axi4.node
+  }
+}
--- a/src/main/scala/uncore/tilelink2/ToAXI4.scala
+++ b/src/main/scala/uncore/tilelink2/ToAXI4.scala
@ -4,6 +4,7 @@ package uncore.tilelink2

 import Chisel._
 import chisel3.internal.sourceinfo.SourceInfo
+import config._
 import diplomacy._
 import util.PositionalMultiQueue
 import uncore.axi4._
@ -35,7 +36,7 @@ case class TLToAXI4Node(idBits: Int) extends MixedNode(TLImp, AXI4Imp)(
  numPO = 1 to 1,
  numPI = 1 to 1)

-class TLToAXI4(idBits: Int, combinational: Boolean = true) extends LazyModule
+class TLToAXI4(idBits: Int, combinational: Boolean = true)(implicit p: Parameters) extends LazyModule
 {
  val node = TLToAXI4Node(idBits)

@ -229,7 +230,7 @@ class TLToAXI4(idBits: Int, combinational: Boolean = true) extends LazyModule
 object TLToAXI4
 {
  // applied to the TL source node; y.node := TLToAXI4(idBits)(x.node)
-  def apply(idBits: Int, combinational: Boolean = true)(x: TLOutwardNode)(implicit sourceInfo: SourceInfo): AXI4OutwardNode = {
+  def apply(idBits: Int, combinational: Boolean = true)(x: TLOutwardNode)(implicit p: Parameters, sourceInfo: SourceInfo): AXI4OutwardNode = {
    val axi4 = LazyModule(new TLToAXI4(idBits, combinational))
    axi4.node := x
    axi4.node
--- a/src/main/scala/uncore/tilelink2/WidthWidget.scala
+++ b/src/main/scala/uncore/tilelink2/WidthWidget.scala
@ -4,11 +4,12 @@ package uncore.tilelink2

 import Chisel._
 import chisel3.internal.sourceinfo.SourceInfo
+import config._
 import diplomacy._
 import scala.math.{min,max}

 // innBeatBytes => the new client-facing bus width
-class TLWidthWidget(innerBeatBytes: Int) extends LazyModule
+class TLWidthWidget(innerBeatBytes: Int)(implicit p: Parameters) extends LazyModule
 {
  val node = TLAdapterNode(
    clientFn  = { case Seq(c) => c },
@ -166,7 +167,7 @@ class TLWidthWidget(innerBeatBytes: Int) extends LazyModule
 object TLWidthWidget
 {
  // applied to the TL source node; y.node := WidthWidget(x.node, 16)
-  def apply(innerBeatBytes: Int)(x: TLOutwardNode)(implicit sourceInfo: SourceInfo): TLOutwardNode = {
+  def apply(innerBeatBytes: Int)(x: TLOutwardNode)(implicit p: Parameters, sourceInfo: SourceInfo): TLOutwardNode = {
    val widget = LazyModule(new TLWidthWidget(innerBeatBytes))
    widget.node := x
    widget.node
@ -176,7 +177,7 @@ object TLWidthWidget
 /** Synthesizeable unit tests */
 import unittest._

-class TLRAMWidthWidget(first: Int, second: Int) extends LazyModule {
+class TLRAMWidthWidget(first: Int, second: Int)(implicit p: Parameters) extends LazyModule {
  val fuzz = LazyModule(new TLFuzzer(5000))
  val model = LazyModule(new TLRAMModel)
  val ram  = LazyModule(new TLRAM(AddressSet(0x0, 0x3ff)))
@ -193,6 +194,6 @@ class TLRAMWidthWidget(first: Int, second: Int) extends LazyModule {
  }
 }

-class TLRAMWidthWidgetTest(little: Int, big: Int) extends UnitTest(timeout = 500000) {
+class TLRAMWidthWidgetTest(little: Int, big: Int)(implicit p: Parameters) extends UnitTest(timeout = 500000) {
  io.finished := Module(LazyModule(new TLRAMWidthWidget(little,big)).module).io.finished
 }
--- a/src/main/scala/uncore/tilelink2/Xbar.scala
+++ b/src/main/scala/uncore/tilelink2/Xbar.scala
@ -3,9 +3,10 @@
 package uncore.tilelink2

 import Chisel._
+import config._
 import diplomacy._

-class TLXbar(policy: TLArbiter.Policy = TLArbiter.lowestIndexFirst) extends LazyModule
+class TLXbar(policy: TLArbiter.Policy = TLArbiter.lowestIndexFirst)(implicit p: Parameters) extends LazyModule
 {
  def mapInputIds (ports: Seq[TLClientPortParameters ]) = assignRanges(ports.map(_.endSourceId))
  def mapOutputIds(ports: Seq[TLManagerPortParameters]) = assignRanges(ports.map(_.endSinkId))
@ -184,7 +185,7 @@ class TLXbar(policy: TLArbiter.Policy = TLArbiter.lowestIndexFirst) extends Lazy
 /** Synthesizeable unit tests */
 import unittest._

-class TLRAMXbar(nManagers: Int) extends LazyModule {
+class TLRAMXbar(nManagers: Int)(implicit p: Parameters) extends LazyModule {
  val fuzz = LazyModule(new TLFuzzer(5000))
  val model = LazyModule(new TLRAMModel)
  val xbar = LazyModule(new TLXbar)
@ -201,11 +202,11 @@ class TLRAMXbar(nManagers: Int) extends LazyModule {
  }
 }

-class TLRAMXbarTest(nManagers: Int) extends UnitTest(timeout = 500000) {
+class TLRAMXbarTest(nManagers: Int)(implicit p: Parameters) extends UnitTest(timeout = 500000) {
  io.finished := Module(LazyModule(new TLRAMXbar(nManagers)).module).io.finished
 }

-class TLMulticlientXbar(nManagers: Int, nClients: Int) extends LazyModule {
+class TLMulticlientXbar(nManagers: Int, nClients: Int)(implicit p: Parameters) extends LazyModule {
  val xbar = LazyModule(new TLXbar)

  val fuzzers = (0 until nClients) map { n =>
@ -224,6 +225,6 @@ class TLMulticlientXbar(nManagers: Int, nClients: Int) extends LazyModule {
  }
 }

-class TLMulticlientXbarTest(nManagers: Int, nClients: Int) extends UnitTest(timeout = 5000000) {
+class TLMulticlientXbarTest(nManagers: Int, nClients: Int)(implicit p: Parameters) extends UnitTest(timeout = 5000000) {
  io.finished := Module(LazyModule(new TLMulticlientXbar(nManagers, nClients)).module).io.finished
 }
--- a/src/main/scala/unittest/Configs.scala
+++ b/src/main/scala/unittest/Configs.scala
@ -25,14 +25,17 @@ class JunctionsUnitTestConfig extends Config(new WithJunctionsUnitTests ++ new B
 class WithUncoreUnitTests extends Config(
  (pname, site, here) => pname match {
    case uncore.tilelink.TLId => "L1toL2"
-    case UnitTests => (p: Parameters) => Seq(
-      Module(new uncore.devices.ROMSlaveTest()(p)),
-      Module(new uncore.devices.TileLinkRAMTest()(p)),
-      Module(new uncore.converters.TileLinkWidthAdapterTest()(p)),
-      Module(new uncore.tilelink2.TLFuzzRAMTest),
-      Module(new uncore.axi4.AXI4LiteFuzzRAMTest),
-      Module(new uncore.axi4.AXI4FullFuzzRAMTest),
-      Module(new uncore.axi4.AXI4BridgeTest))
+    case UnitTests => (q: Parameters) => {
+      implicit val p = q
+      Seq(
+        Module(new uncore.devices.ROMSlaveTest()),
+        Module(new uncore.devices.TileLinkRAMTest()),
+        Module(new uncore.converters.TileLinkWidthAdapterTest()),
+        Module(new uncore.tilelink2.TLFuzzRAMTest),
+        Module(new uncore.ahb.AHBBridgeTest),
+        Module(new uncore.axi4.AXI4LiteFuzzRAMTest),
+        Module(new uncore.axi4.AXI4FullFuzzRAMTest),
+        Module(new uncore.axi4.AXI4BridgeTest)) }
    case _ => throw new CDEMatchError
  }
 )
@ -41,7 +44,8 @@ class UncoreUnitTestConfig extends Config(new WithUncoreUnitTests ++ new BaseCon

 class WithTLSimpleUnitTests extends Config(
  (pname, site, here) => pname match {
-    case UnitTests => (p: Parameters) => {
+    case UnitTests => (q: Parameters) => {
+      implicit val p = q
      Seq(
        Module(new uncore.tilelink2.TLRAMSimpleTest(1)),
        Module(new uncore.tilelink2.TLRAMSimpleTest(4)),
@ -53,7 +57,9 @@ class WithTLSimpleUnitTests extends Config(

 class WithTLWidthUnitTests extends Config(
  (pname, site, here) => pname match {
-    case UnitTests => (p: Parameters) => { Seq(
+    case UnitTests => (q: Parameters) => {
+      implicit val p = q
+      Seq(
        Module(new uncore.tilelink2.TLRAMFragmenterTest( 4, 256)),
        Module(new uncore.tilelink2.TLRAMFragmenterTest(16,  64)),
        Module(new uncore.tilelink2.TLRAMFragmenterTest( 4,  16)),
@ -64,7 +70,9 @@ class WithTLWidthUnitTests extends Config(

 class WithTLXbarUnitTests extends Config(
  (pname, site, here) => pname match {
-    case UnitTests => (p: Parameters) => { Seq(
+    case UnitTests => (q: Parameters) => {
+      implicit val p = q
+      Seq(
        Module(new uncore.tilelink2.TLRAMXbarTest(1)),
        Module(new uncore.tilelink2.TLRAMXbarTest(2)),
        Module(new uncore.tilelink2.TLRAMXbarTest(8)),
--- a/src/main/scala/util/ConfigUtils.scala
+++ b/src/main/scala/util/ConfigUtils.scala
@ -1,11 +0,0 @@
-// See LICENSE.Berkeley for license details.
-
-package util
-
-import scala.math.max
-
-object ConfigUtils {
-  def max_int(values: Int*): Int = {
-    values.reduce((a, b) => max(a, b))
-  }
-}
--- a/src/main/scala/util/GenericParameterizedBundle.scala
+++ b/src/main/scala/util/GenericParameterizedBundle.scala
@ -4,7 +4,7 @@ package util

 import Chisel._

-abstract class GenericParameterizedBundle[T <: Object](val params: T) extends Bundle
+abstract class GenericParameterizedBundle[+T <: Object](val params: T) extends Bundle
 {
  override def cloneType = {
    try {