Merge pull request #567 from ucb-bar/dts

Dts - Device Tree Output

src/main/scala/coreplex/BaseCoreplex.scala

@@ -49,13 +49,12 @@ trait HasCoreplexParameters {
   lazy val cbusConfig = p(CBusConfig)
   lazy val l1tol2Config = p(L1toL2Config)
   lazy val nTiles = tilesParams.size
-  lazy val hasSupervisor = tilesParams.exists(_.core.useVM) // TODO ask andrew about this
   lazy val l2Config = p(BankedL2Config)
 }
 
 case class CoreplexParameters(implicit val p: Parameters) extends HasCoreplexParameters
 
-abstract class BareCoreplex(implicit p: Parameters) extends LazyModule
+abstract class BareCoreplex(implicit p: Parameters) extends LazyModule with BindingScope
 
 abstract class BareCoreplexBundle[+L <: BareCoreplex](_outer: L) extends GenericParameterizedBundle(_outer) {
   val outer = _outer

src/main/scala/coreplex/CoreplexNetwork.scala

@@ -11,6 +11,7 @@ import util._
 
 trait CoreplexNetwork extends HasCoreplexParameters {
   val module: CoreplexNetworkModule
+  def bindingTree: ResourceMap
 
   val l1tol2 = LazyModule(new TLXbar)
   val l1tol2_beatBytes = l1tol2Config.beatBytes
@@ -40,6 +41,53 @@ trait CoreplexNetwork extends HasCoreplexParameters {
   mmio :=
     TLWidthWidget(l1tol2_beatBytes)(
     l1tol2.node)
+
+  val root = new Device {
+    def describe(resources: ResourceBindings): Description = {
+      val width = resources("width").map(_.value)
+      Description("/", Map(
+        "#address-cells" -> width,
+        "#size-cells"    -> width,
+        "model"          -> Seq(ResourceString(p(DTSModel))),
+        "compatible"     -> (p(DTSModel) +: p(DTSCompat)).map(s => ResourceString(s + "-dev"))))
+    }
+  }
+
+  val soc = new Device {
+    def describe(resources: ResourceBindings): Description = {
+      val width = resources("width").map(_.value)
+      Description("soc", Map(
+        "#address-cells" -> width,
+        "#size-cells"    -> width,
+        "compatible"     -> (p(DTSModel) +: p(DTSCompat)).map(s => ResourceString(s + "-soc")),
+        "ranges"         -> Nil))
+    }
+  }
+
+  val cpus = new Device {
+    def describe(resources: ResourceBindings): Description = {
+      Description("cpus", Map(
+        "#address-cells"     -> Seq(ResourceInt(1)),
+        "#size-cells"        -> Seq(ResourceInt(0)),
+        "timebase-frequency" -> Seq(ResourceInt(p(DTSTimebase)))))
+    }
+  }
+
+  ResourceBinding {
+    val managers = l1tol2.node.edgesIn.headOption.map(_.manager.managers).getOrElse(Nil)
+    val max = managers.flatMap(_.address).map(_.max).max
+    val width = ResourceInt((log2Ceil(max)+31) / 32)
+    Resource(root, "width").bind(width)
+    Resource(soc,  "width").bind(width)
+    Resource(cpus, "null").bind(ResourceString(""))
+
+    managers.foreach { case manager =>
+      val value = manager.toResource
+      manager.resources.foreach { case resource =>
+        resource.bind(value)
+      }
+    }
+  }
 }
 
 trait CoreplexNetworkBundle extends HasCoreplexParameters {
@@ -54,16 +102,17 @@ trait CoreplexNetworkModule extends HasCoreplexParameters {
   val outer: CoreplexNetwork
   val io: CoreplexNetworkBundle
 
-  println("\nGenerated Address Map")
+  println("Generated Address Map")
   for (manager <- outer.l1tol2.node.edgesIn(0).manager.managers) {
     val prot = (if (manager.supportsGet)     "R" else "") +
                (if (manager.supportsPutFull) "W" else "") +
                (if (manager.executable)      "X" else "") +
                (if (manager.supportsAcquireB) " [C]" else "")
-    manager.address.foreach { a =>
+    AddressRange.fromSets(manager.address).foreach { r =>
-      println(f"\t${manager.name}%s ${a.base}%x - ${a.base+a.mask+1}%x, $prot")
+      println(f"\t${manager.name}%s ${r.base}%x - ${r.base+r.size}%x, $prot")
     }
   }
+  println("")
 }
 
 /////

src/main/scala/coreplex/RISCVPlatform.scala

@@ -15,7 +15,7 @@ trait CoreplexRISCVPlatform extends CoreplexNetwork {
   val module: CoreplexRISCVPlatformModule
 
   val debug = LazyModule(new TLDebugModule())
-  val plic  = LazyModule(new TLPLIC(hasSupervisor, maxPriorities = 7))
+  val plic  = LazyModule(new TLPLIC(maxPriorities = 7))
   val clint = LazyModule(new CoreplexLocalInterrupter)
 
   debug.node := TLFragmenter(cbus_beatBytes, cbus_lineBytes)(cbus.node)
@@ -24,10 +24,7 @@ trait CoreplexRISCVPlatform extends CoreplexNetwork {
 
   plic.intnode := intBar.intnode
 
-  lazy val configString = {
+  lazy val dts = DTS(bindingTree)
-    val managers = l1tol2.node.edgesIn(0).manager.managers
-    rocketchip.GenerateConfigString(p, clint, plic, managers)
-  }
 }
 
 trait CoreplexRISCVPlatformBundle extends CoreplexNetworkBundle {
@@ -50,6 +47,6 @@ trait CoreplexRISCVPlatformModule extends CoreplexNetworkModule {
   val rtcLast = Reg(init = Bool(false), next=rtcSync)
   outer.clint.module.io.rtcTick := Reg(init = Bool(false), next=(rtcSync & (~rtcLast)))
 
-  println(s"\nGenerated Configuration String\n${outer.configString}")
+  println(outer.dts)
-  ElaborationArtefacts.add("cfg", outer.configString)
+  ElaborationArtefacts.add("dts", outer.dts)
 }

src/main/scala/coreplex/RocketTiles.scala

@@ -23,16 +23,6 @@ trait HasRocketTiles extends CoreplexRISCVPlatform {
   private val crossing = p(RocketCrossing)
   private val configs = p(RocketTilesKey)
 
-  private val rocketTileIntNodes = configs.map { _ => IntInternalOutputNode() }
-  rocketTileIntNodes.foreach { _ := plic.intnode }
-
-  private def wireInterrupts(x: TileInterrupts, i: Int) {
-    x := clint.module.io.tiles(i)
-    x.debug := debug.module.io.debugInterrupts(i)
-    x.meip := rocketTileIntNodes(i).bundleOut(0)(0)
-    x.seip.foreach { _ := rocketTileIntNodes(i).bundleOut(0)(1) }
-  }
-
   val rocketWires: Seq[HasRocketTilesBundle => Unit] = configs.zipWithIndex.map { case (c, i) =>
     val pWithExtra = p.alterPartial {
       case TileKey => c
@@ -41,50 +31,62 @@ trait HasRocketTiles extends CoreplexRISCVPlatform {
       case PAddrBits => l1tol2.node.edgesIn(0).bundle.addressBits
     }
 
+    // Hack debug interrupt into a node (future debug module should use diplomacy)
+    val debugNode = IntInternalInputNode(IntSourcePortSimple())
+
+    val intBar = LazyModule(new IntXbar)
+    intBar.intnode := debugNode
+    intBar.intnode := clint.intnode // msip+mtip
+    intBar.intnode := plic.intnode // meip
+    if (c.core.useVM) intBar.intnode := plic.intnode // seip
+
     crossing match {
       case Synchronous => {
-        val tile = LazyModule(new RocketTile(c)(pWithExtra))
+        val tile = LazyModule(new RocketTile(c, i)(pWithExtra))
         val buffer = LazyModule(new TLBuffer)
         buffer.node :=* tile.masterNode
         l1tol2.node :=* buffer.node
         tile.slaveNode :*= cbus.node
+        tile.intNode := intBar.intnode
         (io: HasRocketTilesBundle) => {
           // leave clock as default (simpler for hierarchical PnR)
           tile.module.io.hartid := UInt(i)
           tile.module.io.resetVector := io.resetVector
-          wireInterrupts(tile.module.io.interrupts, i)
+          debugNode.bundleOut(0)(0) := debug.module.io.debugInterrupts(i)
         }
       }
       case Asynchronous(depth, sync) => {
-        val wrapper = LazyModule(new AsyncRocketTile(c)(pWithExtra))
+        val wrapper = LazyModule(new AsyncRocketTile(c, i)(pWithExtra))
         val sink = LazyModule(new TLAsyncCrossingSink(depth, sync))
         val source = LazyModule(new TLAsyncCrossingSource(sync))
         sink.node :=* wrapper.masterNode
         l1tol2.node :=* sink.node
         wrapper.slaveNode :*= source.node
+        wrapper.intNode := intBar.intnode
         source.node :*= cbus.node
         (io: HasRocketTilesBundle) => {
           wrapper.module.clock := io.tcrs(i).clock
           wrapper.module.reset := io.tcrs(i).reset
           wrapper.module.io.hartid := UInt(i)
           wrapper.module.io.resetVector := io.resetVector
-          wireInterrupts(wrapper.module.io.interrupts, i)
+          debugNode.bundleOut(0)(0) := debug.module.io.debugInterrupts(i)
         }
       }
       case Rational => {
-        val wrapper = LazyModule(new RationalRocketTile(c)(pWithExtra))
+        val wrapper = LazyModule(new RationalRocketTile(c, i)(pWithExtra))
         val sink = LazyModule(new TLRationalCrossingSink(util.FastToSlow))
         val source = LazyModule(new TLRationalCrossingSource)
         sink.node :=* wrapper.masterNode
         l1tol2.node :=* sink.node
         wrapper.slaveNode :*= source.node
+        wrapper.intNode := intBar.intnode
         source.node :*= cbus.node
         (io: HasRocketTilesBundle) => {
           wrapper.module.clock := io.tcrs(i).clock
           wrapper.module.reset := io.tcrs(i).reset
           wrapper.module.io.hartid := UInt(i)
           wrapper.module.io.resetVector := io.resetVector
-          wireInterrupts(wrapper.module.io.interrupts, i)
+          debugNode.bundleOut(0)(0) := debug.module.io.debugInterrupts(i)
         }
       }
     }

src/main/scala/diplomacy/DeviceTree.scala

@@ -0,0 +1,117 @@
+// See LICENSE.SiFive for license details.
+
+package diplomacy
+
+import Chisel._
+import config._
+
+case object DTSModel    extends Field[String]
+case object DTSCompat   extends Field[Seq[String]] // -dev, -soc
+case object DTSTimebase extends Field[BigInt]      // Clock frequency of clint RTC (use 0 if you don't know it)
+
+object DTS
+{
+  def apply(res: ResourceValue): String = "/dts-v1/;\n\n" + helper(res, "", defaultCells).mkString("")
+
+  private val nodeStartChars = (('a' to 'z') ++ ('A' to 'Z')).toSet
+  private val nodeChars = (('a' to 'z') ++ ('A' to 'Z') ++ ('0' to '9') ++ Seq(',', '.', '_', '+', '-', '@')).toSet
+  def legalNode(x: String): Boolean =
+    x == "/" || (!x.isEmpty && x.size < 32 && nodeStartChars.contains(x(0)) && x.forall(nodeChars.contains(_)))
+
+  // the DTS spec does not list '-', but uses it everywhere ...
+  private val propChars = (('a' to 'z') ++ ('A' to 'Z') ++ ('0' to '9') ++ Seq(',', '.', '_', '+', '?', '#', '-')).toSet
+  def legalProperty(x: String): Boolean =
+    x == "/" || (!x.isEmpty && x.size < 32 && x.forall(propChars.contains(_)))
+
+  // The DTS spec doesn't say what is allowed in a string, so just use our own judgement
+  private val strChars = (('#' to '[') ++ (']' to '~') ++ Seq(' ', '!')).toSet
+  def legalString(x: String): Boolean = x.forall(strChars.contains(_))
+
+  private case class Cells(
+    parentAddress: Int,
+    parentSize:    Int,
+    selfAddress:   Int,
+    selfSize:      Int)
+  private val defaultCells = Cells(2, 1, 2, 1)
+
+  private def fmtCell(x: BigInt, cells: Int): Seq[String] = {
+    val cellbits = 32
+    val mask = (BigInt(1) << cellbits) - 1
+    (0 until cells).reverse map { case i => "0x%x".format((x >> (i*cellbits)) & mask) }
+  }
+
+  private def fmtAddress(x: ResourceAddress, cells: Cells): Seq[String] = {
+    val ranges = AddressRange.fromSets(x.address)
+    ranges.flatMap { case AddressRange(base, size) =>
+      fmtCell(base, cells.parentAddress)  ++ fmtCell(size, cells.parentSize)
+    }
+  }
+
+  private def fmtMapping(x: ResourceMapping, cells: Cells): Seq[String] = {
+    val ranges = AddressRange.fromSets(x.address)
+    ranges.flatMap { case AddressRange(base, size) =>
+      fmtCell(base+x.offset, cells.selfAddress) ++ fmtCell(base, cells.parentAddress) ++ fmtCell(size, cells.selfSize)
+    }
+  }
+
+  private def fmtString(x: ResourceString): Seq[String] = {
+    require (legalString(x.value), s"The string '${x.value}' contains chars probably unwise for use in a DTS string")
+    Seq("\"" + x.value + "\"")
+  }
+
+  private def fmtMap(x: ResourceMap, indent: String, cells: Cells): Seq[String] = {
+    val (nodes, props) = x.value.partition(_ match {
+      case (_, Seq(ResourceMap(_, _))) => true
+      case _ => false
+    })
+
+    def getInt(x: ResourceValue) = x match {
+      case ResourceInt(value) => Some(value.toInt)
+      case _ => None
+    }
+    val selfAddress = x.value.getOrElse("#address-cells", Nil).headOption.flatMap(getInt)
+    val selfSize    = x.value.getOrElse("#size-cells",    Nil).headOption.flatMap(getInt)
+
+    val myCells = Cells(
+      parentAddress = cells.selfAddress,
+      parentSize    = cells.selfSize,
+      selfAddress   = selfAddress.getOrElse(defaultCells.selfAddress),
+      selfSize      = selfSize   .getOrElse(defaultCells.selfSize))
+
+    props.flatMap { case (k, seq) =>
+      require (legalProperty(k), s"The string '${k}' is not a legal DTS property name")
+      seq.headOption match {
+        case None => Seq(indent, k, ";\n")
+        case Some(ResourceString(_)) => {
+          seq.foreach { r => r match {
+            case ResourceString(_) => Unit
+            case _ => require(false, s"The property '${k}' has values of conflicting type: ${seq}")
+          } }
+          Seq(indent, k, " = ", seq.flatMap(z => helper(z, "", myCells)).mkString(", "), ";\n")
+        }
+        case Some(_) => {
+          seq.foreach { r => r match {
+            case ResourceMap(_, _) => require(false, s"The property '${k}' has values of conflicting type: ${seq}")
+            case ResourceString(_) => require(false, s"The property '${k}' has values of conflicting type: ${seq}")
+            case _ => Unit
+          } }
+          Seq(indent, k, " = <", seq.flatMap(z => helper(z, "", myCells)).mkString(" "), ">;\n")
+        }
+      }
+    }.toList ++
+    nodes.flatMap { case (k, Seq(s: ResourceMap)) =>
+      require (legalNode(k), s"The string '${k}' is not a legal DTS node name")
+      Seq(indent) ++ s.labels.map(_ + ": ").filter(_ => !indent.isEmpty) ++ // labels on root not allowed
+      Seq(k, " {\n") ++ helper(s, indent + "\t", myCells) ++ Seq(indent, "};\n")
+    }
+  }
+
+  private def helper(res: ResourceValue, indent: String, cells: Cells): Seq[String] = res match {
+    case x: ResourceAddress => fmtAddress(x, cells)
+    case x: ResourceMapping => fmtMapping(x, cells)
+    case x: ResourceInt => Seq(x.value.toString)
+    case x: ResourceString => fmtString(x)
+    case x: ResourceReference => Seq("&" + x.value)
+    case x: ResourceMap => fmtMap(x, indent, cells)
+  }
+}

src/main/scala/diplomacy/Nodes.scala

@@ -302,8 +302,8 @@ class MixedNexusNode[DI, UI, EI, BI <: Data, DO, UO, EO, BO <: Data](
   numPI: Range.Inclusive = 1 to 999)
   extends MixedNode(inner, outer)(numPO, numPI)
 {
-  require (numPO.end >= 1, s"${name} does not accept outputs${lazyModule.line}")
+//  require (numPO.end >= 1, s"${name} does not accept outputs${lazyModule.line}")
-  require (numPI.end >= 1, s"${name} does not accept inputs${lazyModule.line}")
+//  require (numPI.end >= 1, s"${name} does not accept inputs${lazyModule.line}")
 
   val externalIn: Boolean = true
   val externalOut: Boolean = true

src/main/scala/diplomacy/Parameters.scala

@@ -76,6 +76,32 @@ object TransferSizes {
   implicit def asBool(x: TransferSizes) = !x.none
 }
 
+// Use AddressSet instead -- this is just for pretty printing
+case class AddressRange(base: BigInt, size: BigInt) extends Ordered[AddressRange]
+{
+  val end = base + size
+
+  require (base >= 0)
+  require (size > 0)
+
+  def compare(x: AddressRange) = {
+    val primary   = (this.base - x.base).signum
+    val secondary = (x.size - this.size).signum
+    if (primary != 0) primary else secondary
+  }
+
+  def contains(x: AddressRange) = base <= x.base && x.end <= end
+  def union(x: AddressRange): Option[AddressRange] = {
+    if (base > x.end || x.base > end) {
+      None
+    } else {
+      val obase = if (base < x.base) base else x.base
+      val oend  = if (end  > x.end)  end  else x.end
+      Some(AddressRange(obase, oend-obase))
+    }
+  }
+}
+
 // AddressSets specify the address space managed by the manager
 // Base is the base address, and mask are the bits consumed by the manager
 // e.g: base=0x200, mask=0xff describes a device managing 0x200-0x2ff
@@ -132,6 +158,32 @@ case class AddressSet(base: BigInt, mask: BigInt) extends Ordered[AddressSet]
       "AddressSet(0x%x, ~0x%x)".format(base, ~mask)
     }
   }
+
+  def toRanges = {
+    require (finite)
+    val size = alignment
+    val fragments = mask & ~(size-1)
+    val bits = bitIndexes(fragments)
+    (BigInt(0) until (BigInt(1) << bits.size)).map { i =>
+      val off = bitIndexes(i).foldLeft(base) { case (a, b) => a.setBit(bits(b)) }
+      AddressRange(off, size)
+    }
+  }
+}
+
+object AddressRange
+{
+  def fromSets(seq: Seq[AddressSet]): Seq[AddressRange] = unify(seq.flatMap(_.toRanges))
+  def unify(seq: Seq[AddressRange]): Seq[AddressRange] = {
+    if (seq.isEmpty) return Nil
+    val ranges = seq.sorted
+    ranges.tail.foldLeft(Seq(ranges.head)) { case (head :: tail, x) =>
+      head.union(x) match {
+        case Some(z) => z :: tail
+        case None => x :: head :: tail
+      }
+    }.reverse
+  }
 }
 
 object AddressSet

src/main/scala/diplomacy/Resources.scala

@@ -0,0 +1,189 @@
+// See LICENSE.SiFive for license details.
+
+package diplomacy
+
+import Chisel._
+import config._
+import scala.collection.immutable.{ListMap,SortedMap}
+
+sealed trait ResourceValue
+final case class ResourceAddress(address: Seq[AddressSet], r: Boolean, w: Boolean, x: Boolean) extends ResourceValue
+final case class ResourceMapping(address: Seq[AddressSet], offset: BigInt) extends ResourceValue
+final case class ResourceInt(value: BigInt) extends ResourceValue
+final case class ResourceString(value: String) extends ResourceValue
+final case class ResourceReference(value: String) extends ResourceValue
+final case class ResourceMap(value: Map[String, Seq[ResourceValue]], labels: Seq[String] = Nil) extends ResourceValue
+
+/* If device is None, the value is global */
+case class Binding(device: Option[Device], value: ResourceValue)
+case class ResourceBindings(map: Map[String, Seq[Binding]])
+{
+  def apply(key: String): Seq[Binding] = map.getOrElse(key, Nil)
+}
+
+case class Description(name: String, mapping: Map[String, Seq[ResourceValue]])
+
+abstract class Device
+{
+  def describe(resources: ResourceBindings): Description
+
+  val label = "L" + Device.index.toString
+  Device.index = Device.index + 1
+}
+
+object Device
+{
+  private var index: Int = 0
+}
+
+trait DeviceInterrupts
+{
+  this: Device =>
+  val alwaysExtended = false
+  def describeInterrupts(resources: ResourceBindings): Map[String, Seq[ResourceValue]] = {
+    val int = resources("int")
+
+    int.foreach { b => require (b.device.isDefined, "Device ${devname} property 'int' is missing user device") }
+    val parents = int.map(_.device.get).distinct
+    val simple = parents.size == 1 && !alwaysExtended
+
+    val parent =
+      if (!simple) None else
+      Some("interrupt-parent" -> Seq(ResourceReference(parents.head.label)))
+    val interrupts =
+      if (!simple) None else
+      Some("interrupts" -> int.map(_.value))
+
+    val interrupts_extended =
+      if (simple || parents.isEmpty) None else
+      Some("interrupts-extended" -> int.flatMap(b => Seq(ResourceReference(b.device.get.label), b.value)))
+
+    ListMap() ++ parent ++ interrupts ++ interrupts_extended
+  }
+
+  def int = Seq(Resource(this, "int"))
+}
+
+trait DeviceRegName
+{
+  this: Device =>
+  val prefix = "soc/" // nearly everything on-chip belongs here
+  def describeName(devname: String, resources: ResourceBindings): String = {
+    val reg = resources("reg")
+    require (!reg.isEmpty, "Device is missing the 'reg' property")
+    reg.head.value match {
+      case x: ResourceAddress => s"${prefix}${devname}@${x.address.head.base.toString(16)}"
+      case _ => require(false, "Device has the wrong type of 'reg' property (${reg.head})"); ""
+    }
+  }
+
+  def reg = Seq(Resource(this, "reg"))
+}
+
+class SimpleDevice(devname: String, devcompat: Seq[String]) extends Device with DeviceInterrupts with DeviceRegName
+{
+  def describe(resources: ResourceBindings): Description = {
+    val name = describeName(devname, resources)
+    val int = describeInterrupts(resources)
+    val compat =
+      if (devcompat.isEmpty) None else
+      Some("compatible" -> devcompat.map(ResourceString(_)))
+
+    Description(name,
+      ListMap("reg" -> resources("reg").map(_.value))
+      ++ compat ++ int)
+  }
+}
+
+class MemoryDevice extends Device with DeviceRegName
+{
+  override val prefix = ""
+  def describe(resources: ResourceBindings): Description = {
+    Description(describeName("memory", resources), ListMap(
+      "reg"         -> resources("reg").map(_.value),
+      "device_type" -> Seq(ResourceString("memory"))))
+  }
+}
+
+case class Resource(owner: Device, key: String)
+{
+  def bind(user: Device, value: ResourceValue) {
+    val scope = BindingScope.active.get
+    scope.resourceBindings = (this, Some(user), value) +: scope.resourceBindings
+  }
+  def bind(value: ResourceValue) {
+    val scope = BindingScope.active.get
+    scope.resourceBindings = (this, None, value) +: scope.resourceBindings
+  }
+}
+
+trait BindingScope
+{
+  this: LazyModule =>
+
+  private val parentScope = BindingScope.find(parent)
+  protected[diplomacy] var resourceBindingFns: Seq[() => Unit] = Nil
+  protected[diplomacy] var resourceBindings: Seq[(Resource, Option[Device], ResourceValue)] = Nil
+
+  private case class ExpandedValue(path: Seq[String], labels: Seq[String], value: Seq[ResourceValue])
+  private def eval() {
+    require (LazyModule.stack.isEmpty, "May not evaluate binding while still constructing LazyModules")
+    parentScope.foreach { _.eval() }
+    resourceBindings = parentScope.map(_.resourceBindings).getOrElse(Nil)
+    BindingScope.active = Some(this)
+    resourceBindingFns.reverse.foreach { _() }
+    BindingScope.active = None
+    resourceBindingFns = Nil
+  }
+
+  private def makeTree(list: Seq[ExpandedValue]): Seq[ResourceValue] = {
+    val (values_p, keys_p) = list.partition(_.path.isEmpty)
+    val values = values_p.flatMap(_.value)
+    val labels = values_p.flatMap(_.labels)
+    val keys = keys_p.groupBy(_.path.head).toList.map { case (key, seq) =>
+      (key -> makeTree(seq.map { x => x.copy(path = x.path.tail) }))
+      // case ExpandedValue(keys, values) => ExpandedValue(keys.tail, values) }))
+    }
+    if (keys.isEmpty) values else ResourceMap(SortedMap(keys:_*), labels) +: values
+  }
+
+  private def expand(path: Seq[String], values: Seq[ResourceValue]): Seq[ExpandedValue] = {
+    ExpandedValue(path, Nil, Nil) +:
+    values.flatMap {
+      case ResourceMap(map, labels) =>
+        ExpandedValue(path, labels, Nil) +:
+        map.toList.flatMap { case (key, values) => expand(path :+ key, values) }
+      case z => Seq(ExpandedValue(path, Nil, Seq(z)))
+    }
+  }
+
+  def bindingTree: ResourceMap = {
+    eval()
+    val map: Map[Device, ResourceBindings] =
+      resourceBindings.reverse.groupBy(_._1.owner).mapValues(seq => ResourceBindings(
+        seq.groupBy(_._1.key).mapValues(_.map(z => Binding(z._2, z._3)))))
+    val tree = makeTree(map.toList.flatMap { case (d, m) =>
+      val Description(name, mapping) = d.describe(m)
+      val tokens = name.split("/").toList
+      expand(tokens, Seq(ResourceMap(mapping, Seq(d.label)))) })
+    ResourceMap(SortedMap("/" -> tree))
+  }
+}
+
+object BindingScope
+{
+  protected[diplomacy] var active: Option[BindingScope] = None
+  protected[diplomacy] def find(m: Option[LazyModule] = LazyModule.stack.headOption): Option[BindingScope] = m.flatMap {
+    case s: BindingScope => Some(s)
+    case x => find(x.parent)
+  }
+}
+
+object ResourceBinding
+{
+  def apply(block: => Unit) {
+    val scope = BindingScope.find()
+    require (scope.isDefined, "ResourceBinding must be called from within a BindingScope")
+    scope.get.resourceBindingFns = { () => block } +: scope.get.resourceBindingFns
+  }
+}

src/main/scala/diplomacy/package.scala

@@ -9,4 +9,14 @@ package object diplomacy
     case SourceLine(filename, line, col) => s"$prefix$filename:$line:$col$suffix"
     case _ => ""
   }
+
+  def bitIndexes(x: BigInt, tail: Seq[Int] = Nil): Seq[Int] = {
+    require (x >= 0)
+    if (x == 0) {
+      tail.reverse
+    } else {
+      val lowest = x.lowestSetBit
+      bitIndexes(x.clearBit(lowest), lowest +: tail)
+    }
+  }
 }

src/main/scala/rocket/Rocket.scala

@@ -11,6 +11,7 @@ import util._
 import Chisel.ImplicitConversions._
 
 case class RocketCoreParams(
+  bootFreqHz: BigInt = 0,
   useVM: Boolean = true,
   useUser: Boolean = false,
   useDebug: Boolean = true,

src/main/scala/rocket/Tile.scala

@@ -23,12 +23,85 @@ case class RocketTileParams(
   require(dcache.isDefined)
 }
   
-class RocketTile(val rocketParams: RocketTileParams)(implicit p: Parameters) extends BaseTile(rocketParams)(p)
+class RocketTile(val rocketParams: RocketTileParams, val hartid: Int)(implicit p: Parameters) extends BaseTile(rocketParams)(p)
     with CanHaveLegacyRoccs  // implies CanHaveSharedFPU with CanHavePTW with HasHellaCache
     with CanHaveScratchpad { // implies CanHavePTW with HasHellaCache with HasICacheFrontend
 
   nDCachePorts += 1 // core TODO dcachePorts += () => module.core.io.dmem ??
 
+  val device = new Device {
+    def ofInt(x: Int) = Seq(ResourceInt(BigInt(x)))
+    def ofStr(x: String) = Seq(ResourceString(x))
+    def describe(resources: ResourceBindings): Description = {
+      val block =  p(CacheBlockBytes)
+      val m = if (rocketParams.core.mulDiv.nonEmpty) "m" else ""
+      val a = if (rocketParams.core.useAtomics) "a" else ""
+      val f = if (rocketParams.core.fpu.nonEmpty) "f" else ""
+      val d = if (rocketParams.core.fpu.nonEmpty && p(XLen) > 32) "d" else ""
+      val c = if (rocketParams.core.useCompressed) "c" else ""
+      val s = if (rocketParams.core.useVM) "s" else ""
+      val isa = s"rv${p(XLen)}i$m$a$f$d$c$s"
+
+      val dcache = rocketParams.dcache.map(d => Map(
+        "d-tlb-size"           -> ofInt(d.nTLBEntries),
+        "d-tlb-sets"           -> ofInt(1),
+        "d-cache-block-size"   -> ofInt(block),
+        "d-cache-sets"         -> ofInt(d.nSets),
+        "d-cache-size"         -> ofInt(d.nSets * d.nWays * block))).getOrElse(Map())
+
+      val icache = rocketParams.icache.map(i => Map(
+        "i-tlb-size"           -> ofInt(i.nTLBEntries),
+        "i-tlb-sets"           -> ofInt(1),
+        "i-cache-block-size"   -> ofInt(block),
+        "i-cache-sets"         -> ofInt(i.nSets),
+        "i-cache-size"         -> ofInt(i.nSets * i.nWays * block))).getOrElse(Map())
+
+      // Find all the caches
+      val outer = masterNode.edgesOut
+        .flatMap(_.manager.managers)
+        .filter(_.supportsAcquireB)
+        .flatMap(_.resources.headOption)
+        .map(_.owner.label)
+        .distinct
+      val nextlevel: Option[(String, Seq[ResourceValue])] =
+        if (outer.isEmpty) None else
+        Some("next-level-cache" -> outer.map(l => ResourceReference(l)).toList)
+
+      Description(s"cpus/cpu@${hartid}", Map(
+        "reg"                  -> resources("reg").map(_.value),
+        "device_type"          -> ofStr("cpu"),
+        "compatible"           -> ofStr("riscv"),
+        "status"               -> ofStr("okay"),
+        "clock-frequency"      -> Seq(ResourceInt(rocketParams.core.bootFreqHz)),
+        "riscv,isa"            -> ofStr(isa),
+        "mmu-type"             -> ofStr(p(PgLevels) match {
+                                    case 2 => "riscv,sv32"
+                                    case 3 => "riscv,sv39"
+                                    case 4 => "riscv,sv48" }),
+        "tlb-split"            -> Nil,
+        "interrupt-controller" -> Nil,
+        "#interrupt-cells"     -> ofInt(1))
+        ++ dcache ++ icache ++ nextlevel)
+    }
+  }
+
+  ResourceBinding {
+    Resource(device, "reg").bind(ResourceInt(BigInt(hartid)))
+
+    // debug, msip, mtip, meip, seip offsets in CSRs
+    val intMap = Seq(65535, 3, 7, 11, 9)
+
+    intNode.edgesIn.flatMap(_.source.sources).map { case s =>
+      for (i <- s.range.start until s.range.end) {
+       intMap.lift(i).foreach { j =>
+          s.resources.foreach { r =>
+            r.bind(device, ResourceInt(j))
+          }
+        }
+      }
+    }
+  }
+
   override lazy val module = new RocketTileModule(this)
 }
 
@@ -40,7 +113,6 @@ class RocketTileModule(outer: RocketTile) extends BaseTileModule(outer, () => ne
     with CanHaveScratchpadModule {
 
   val core = Module(p(BuildCore)(outer.p))
-  core.io.interrupts := io.interrupts
   core.io.hartid := io.hartid
   outer.frontend.module.io.cpu <> core.io.imem
   outer.frontend.module.io.resetVector := io.resetVector
@@ -55,6 +127,13 @@ class RocketTileModule(outer: RocketTile) extends BaseTileModule(outer, () => ne
     core.io.rocc.interrupt := lr.module.io.core.interrupt
   }
 
+  // Decode the interrupt vector
+  core.io.interrupts.debug := io.interrupts(0)(0)
+  core.io.interrupts.msip  := io.interrupts(0)(1)
+  core.io.interrupts.mtip  := io.interrupts(0)(2)
+  core.io.interrupts.meip  := io.interrupts(0)(3)
+  core.io.interrupts.seip.foreach { _ := io.interrupts(0)(4) }
+
   // TODO eliminate this redundancy
   val h = dcachePorts.size
   val c = core.dcacheArbPorts
@@ -66,8 +145,8 @@ class RocketTileModule(outer: RocketTile) extends BaseTileModule(outer, () => ne
   ptwOpt foreach { ptw => ptw.io.requestor <> ptwPorts }
 }
 
-class AsyncRocketTile(rtp: RocketTileParams)(implicit p: Parameters) extends LazyModule {
+class AsyncRocketTile(rtp: RocketTileParams, hartid: Int)(implicit p: Parameters) extends LazyModule {
-  val rocket = LazyModule(new RocketTile(rtp))
+  val rocket = LazyModule(new RocketTile(rtp, hartid))
 
   val masterNode = TLAsyncOutputNode()
   val source = LazyModule(new TLAsyncCrossingSource)
@@ -79,23 +158,27 @@ class AsyncRocketTile(rtp: RocketTileParams)(implicit p: Parameters) extends Laz
   rocket.slaveNode :*= sink.node
   sink.node :*= slaveNode
 
+  val intNode = IntInputNode()
+  val xing = LazyModule(new IntXing(3))
+  rocket.intNode := xing.intnode
+  xing.intnode := intNode
+
   lazy val module = new LazyModuleImp(this) {
     val io = new Bundle {
       val master = masterNode.bundleOut
       val slave = slaveNode.bundleIn
+      val interrupts = intNode.bundleIn
       val hartid = UInt(INPUT, p(XLen))
-      val interrupts = new TileInterrupts()(p).asInput
       val resetVector = UInt(INPUT, p(XLen))
     }
-    rocket.module.io.interrupts := ShiftRegister(io.interrupts, 3)
     // signals that do not change:
     rocket.module.io.hartid := io.hartid
     rocket.module.io.resetVector := io.resetVector
   }
 }
 
-class RationalRocketTile(rtp: RocketTileParams)(implicit p: Parameters) extends LazyModule {
+class RationalRocketTile(rtp: RocketTileParams, hartid: Int)(implicit p: Parameters) extends LazyModule {
-  val rocket = LazyModule(new RocketTile(rtp))
+  val rocket = LazyModule(new RocketTile(rtp, hartid))
 
   val masterNode = TLRationalOutputNode()
   val source = LazyModule(new TLRationalCrossingSource)
@@ -107,15 +190,19 @@ class RationalRocketTile(rtp: RocketTileParams)(implicit p: Parameters) extends
   rocket.slaveNode :*= sink.node
   sink.node :*= slaveNode
 
+  val intNode = IntInputNode()
+  val xing = LazyModule(new IntXing(1))
+  rocket.intNode := xing.intnode
+  xing.intnode := intNode
+
   lazy val module = new LazyModuleImp(this) {
     val io = new Bundle {
       val master = masterNode.bundleOut
       val slave = slaveNode.bundleIn
+      val interrupts = intNode.bundleIn
       val hartid = UInt(INPUT, p(XLen))
-      val interrupts = new TileInterrupts()(p).asInput
       val resetVector = UInt(INPUT, p(XLen))
     }
-    rocket.module.io.interrupts := ShiftRegister(io.interrupts, 1)
     // signals that do not change:
     rocket.module.io.hartid := io.hartid
     rocket.module.io.resetVector := io.resetVector

src/main/scala/rocketchip/Configs.scala

@@ -20,6 +20,10 @@ import DefaultTestSuites._
 import config._
 
 class BasePlatformConfig extends Config((site, here, up) => {
+  // DTS descriptive parameters
+  case DTSModel => "ucbbar,rocketchip-unknown"
+  case DTSCompat => Nil
+  case DTSTimebase => BigInt(0)
   // TileLink connection parameters
   case TLMonitorBuilder => (args: TLMonitorArgs) => Some(LazyModule(new TLMonitor(args)))
   case TLFuzzReadyValid => false
@@ -139,6 +143,11 @@ class WithExtMemSize(n: Long) extends Config((site, here, up) => {
   case ExtMem => up(ExtMem, site).copy(size = n)
 })
 
+class WithDTS(model: String, compat: Seq[String]) extends Config((site, here, up) => {
+  case DTSModel => model
+  case DTSCompat => compat
+})
+
 class WithScratchpad extends Config(new WithNMemoryChannels(0) ++ new WithDataScratchpad(16384))
 
 class DefaultFPGASmallConfig extends Config(new WithNSmallCores(1) ++ new DefaultFPGAConfig)

src/main/scala/rocketchip/Periphery.scala

@@ -51,8 +51,14 @@ trait HasPeripheryParameters {
 trait PeripheryExtInterrupts {
   this: HasTopLevelNetworks =>
 
+  private val device = new Device with DeviceInterrupts {
+    def describe(resources: ResourceBindings): Description = {
+      Description("soc/offchip-interrupts", describeInterrupts(resources))
+    }
+  }
+
   val nExtInterrupts = p(NExtTopInterrupts)
-  val extInterrupts = IntInternalInputNode(nExtInterrupts)
+  val extInterrupts = IntInternalInputNode(IntSourcePortSimple(num = nExtInterrupts, resources = device.int))
   val extInterruptXing = LazyModule(new IntXing)
 
   intBus.intnode := extInterruptXing.intnode
@@ -84,6 +90,8 @@ trait PeripheryMasterAXI4Mem {
   private val channels = p(BankedL2Config).nMemoryChannels
   private val lineBytes = p(CacheBlockBytes)
 
+  private val device = new MemoryDevice
+
   val mem_axi4 = AXI4BlindOutputNode(Seq.tabulate(channels) { channel =>
     val base = AddressSet(config.base, config.size-1)
     val filter = AddressSet(channel * lineBytes, ~((channels-1) * lineBytes))
@@ -91,6 +99,7 @@ trait PeripheryMasterAXI4Mem {
     AXI4SlavePortParameters(
       slaves = Seq(AXI4SlaveParameters(
         address       = base.intersect(filter).toList,
+        resources     = device.reg,
         regionType    = RegionType.UNCACHED,   // cacheable
         executable    = true,
         supportsWrite = TransferSizes(1, 256), // The slave supports 1-256 byte transfers
@@ -160,9 +169,11 @@ trait PeripheryMasterAXI4MMIO {
   this: HasTopLevelNetworks =>
 
   private val config = p(ExtBus)
+  private val device = new SimpleDevice("mmio", Nil)
   val mmio_axi4 = AXI4BlindOutputNode(Seq(AXI4SlavePortParameters(
     slaves = Seq(AXI4SlaveParameters(
       address       = List(AddressSet(BigInt(config.base), config.size-1)),
+      resources     = device.reg,
       executable    = true,                  // Can we run programs on this memory?
       supportsWrite = TransferSizes(1, 256), // The slave supports 1-256 byte transfers
       supportsRead  = TransferSizes(1, 256),
@@ -227,9 +238,11 @@ trait PeripheryMasterTLMMIO {
   this: HasTopLevelNetworks =>
 
   private val config = p(ExtBus)
+  private val device = new SimpleDevice("mmio", Nil)
   val mmio_tl = TLBlindOutputNode(Seq(TLManagerPortParameters(
     managers = Seq(TLManagerParameters(
       address            = List(AddressSet(BigInt(config.base), config.size-1)),
+      resources          = device.reg,
       executable         = true,
       supportsGet        = TransferSizes(1, cacheBlockBytes),
       supportsPutFull    = TransferSizes(1, cacheBlockBytes),
@@ -292,7 +305,7 @@ trait PeripheryBootROM {
 
   private val bootrom_address = 0x1000
   private val bootrom_size = 0x1000
-  private lazy val bootrom_contents = GenerateBootROM(p, bootrom_address, coreplex.configString)
+  private lazy val bootrom_contents = GenerateBootROM(p, bootrom_address, coreplex.dts)
   val bootrom = LazyModule(new TLROM(bootrom_address, bootrom_size, bootrom_contents, true, peripheryBusConfig.beatBytes))
   bootrom.node := TLFragmenter(peripheryBusConfig.beatBytes, cacheBlockBytes)(peripheryBus.node)
 }

src/main/scala/rocketchip/Utils.scala

@@ -52,50 +52,18 @@ class GlobalVariable[T] {
   def get: T = { require(assigned); variable }
 }
 
-object GenerateConfigString {
-  def apply(p: Parameters, clint: CoreplexLocalInterrupter, plic: TLPLIC, peripheryManagers: Seq[TLManagerParameters]) = {
-    val c = CoreplexParameters()(p)
-    val res = new StringBuilder
-    res append plic.globalConfigString
-    res append clint.globalConfigString
-    res append  "core {\n"
-    c.tilesParams.zipWithIndex.map { case(t, i) => 
-      val isa = {
-        val m = if (t.core.mulDiv.nonEmpty) "m" else ""
-        val a = if (t.core.useAtomics) "a" else ""
-        val f = if (t.core.fpu.nonEmpty) "f" else ""
-        val d = if (t.core.fpu.nonEmpty && p(XLen) > 32) "d" else ""
-        val c = if (t.core.useCompressed) "c" else ""
-        val s = if (t.core.useVM) "s" else ""
-        s"rv${p(XLen)}i$m$a$f$d$c$s"
-      }
-      res append s"  $i {\n"
-      res append  "    0 {\n"
-      res append s"      isa $isa;\n"
-      res append clint.hartConfigStrings(i)
-      res append plic.hartConfigStrings(i)
-      res append  "    };\n"
-      res append  "  };\n"
-    }
-    res append  "};\n"
-    peripheryManagers.foreach { manager => res append manager.dts }
-    res append '\u0000'
-    res.toString
-  }
-}
-
 object GenerateBootROM {
-  def apply(p: Parameters, address: BigInt, configString: String) = {
+  def apply(p: Parameters, address: BigInt, dts: String) = {
     val romdata = Files.readAllBytes(Paths.get(p(BootROMFile)))
     val rom = ByteBuffer.wrap(romdata)
 
     rom.order(ByteOrder.LITTLE_ENDIAN)
 
     require(address == address.toInt)
-    val configStringAddr = address.toInt + rom.capacity
+    val dtsAddr = address.toInt + rom.capacity
     require(rom.getInt(12) == 0,
-      "Config string address position should not be occupied by code")
+      "DTS address position should not be occupied by code")
-    rom.putInt(12, configStringAddr)
+    rom.putInt(12, dtsAddr)
-    rom.array() ++ (configString.getBytes.toSeq)
+    rom.array() ++ (dts.getBytes.toSeq)
   }
 }

src/main/scala/tile/BaseTile.scala

@@ -53,11 +53,13 @@ trait HasTileLinkMasterPort extends HasTileParameters {
   implicit val p: Parameters
   val module: HasTileLinkMasterPortModule
   val masterNode = TLOutputNode()
+  val intNode = IntSinkNode(IntSinkPortSimple())
 }
 
 trait HasTileLinkMasterPortBundle {
   val outer: HasTileLinkMasterPort
   val master = outer.masterNode.bundleOut
+  val interrupts = outer.intNode.bundleIn
 }
 
 trait HasTileLinkMasterPortModule {
@@ -73,7 +75,6 @@ abstract class BaseTile(tileParams: TileParams)(implicit p: Parameters) extends
 class BaseTileBundle[+L <: BaseTile](_outer: L) extends BareTileBundle(_outer)
     with HasTileLinkMasterPortBundle {
   val hartid = UInt(INPUT, p(XLen))
-  val interrupts = new TileInterrupts()(p).asInput
   val resetVector = UInt(INPUT, p(XLen))
 }
 

src/main/scala/uncore/ahb/Parameters.scala

@@ -9,6 +9,7 @@ import scala.math.max
 
 case class AHBSlaveParameters(
   address:       Seq[AddressSet],
+  resources:     Seq[Resource] = Nil,
   regionType:    RegionType.T  = RegionType.GET_EFFECTS,
   executable:    Boolean       = false, // processor can execute from this memory
   nodePath:      Seq[BaseNode] = Seq(),

src/main/scala/uncore/ahb/RegisterRouter.scala

@@ -77,7 +77,7 @@ object AHBRegisterNode
 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)
+  val intnode = uncore.tilelink2.IntSourceNode(uncore.tilelink2.IntSourcePortSimple(num = interrupts))
 }
 
 case class AHBRegBundleArg(interrupts: util.HeterogeneousBag[Vec[Bool]], in: util.HeterogeneousBag[AHBBundle])(implicit val p: Parameters)

src/main/scala/uncore/apb/Parameters.scala

@@ -9,6 +9,7 @@ import scala.math.max
 
 case class APBSlaveParameters(
   address:       Seq[AddressSet],
+  resources:     Seq[Resource] = Nil,
   regionType:    RegionType.T  = RegionType.GET_EFFECTS,
   executable:    Boolean       = false, // processor can execute from this memory
   nodePath:      Seq[BaseNode] = Seq(),

src/main/scala/uncore/apb/RegisterRouter.scala

@@ -61,7 +61,7 @@ object APBRegisterNode
 abstract class APBRegisterRouterBase(address: AddressSet, interrupts: Int, concurrency: Int, beatBytes: Int, undefZero: Boolean, executable: Boolean)(implicit p: Parameters) extends LazyModule
 {
   val node = APBRegisterNode(address, concurrency, beatBytes, undefZero, executable)
-  val intnode = uncore.tilelink2.IntSourceNode(interrupts)
+  val intnode = uncore.tilelink2.IntSourceNode(uncore.tilelink2.IntSourcePortSimple(num = interrupts))
 }
 
 case class APBRegBundleArg(interrupts: util.HeterogeneousBag[Vec[Bool]], in: util.HeterogeneousBag[APBBundle])(implicit val p: Parameters)

src/main/scala/uncore/axi4/Parameters.scala

@@ -9,6 +9,7 @@ import scala.math.max
 
 case class AXI4SlaveParameters(
   address:       Seq[AddressSet],
+  resources:     Seq[Resource] = Nil,
   regionType:    RegionType.T  = RegionType.GET_EFFECTS,
   executable:    Boolean       = false, // processor can execute from this memory
   nodePath:      Seq[BaseNode] = Seq(),

src/main/scala/uncore/axi4/RegisterRouter.scala

@@ -82,7 +82,7 @@ object AXI4RegisterNode
 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)
+  val intnode = uncore.tilelink2.IntSourceNode(uncore.tilelink2.IntSourcePortSimple(num = interrupts))
 }
 
 case class AXI4RegBundleArg(interrupts: util.HeterogeneousBag[Vec[Bool]], in: util.HeterogeneousBag[AXI4Bundle])(implicit val p: Parameters)

src/main/scala/uncore/axi4/ToTL.scala

@@ -20,6 +20,7 @@ case class AXI4ToTLNode() extends MixedAdapterNode(AXI4Imp, TLImp)(
     slaves = mp.managers.map { m =>
       AXI4SlaveParameters(
         address       = m.address,
+        resources     = m.resources,
         regionType    = m.regionType,
         executable    = m.executable,
         nodePath      = m.nodePath,

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

@@ -849,7 +849,7 @@ trait DebugModule extends Module with HasDebugModuleParameters with HasRegMap {
   */
 
 class TLDebugModule(address: BigInt = 0)(implicit p: Parameters)
-  extends TLRegisterRouter(address, beatBytes=p(XLen)/8, executable=true)(
+  extends TLRegisterRouter(address, "debug", Nil, beatBytes=p(XLen)/8, executable=true)(
   new TLRegBundle((), _ )    with DebugModuleBundle)(
   new TLRegModule((), _, _)  with DebugModule)
 

src/main/scala/uncore/devices/Plic.scala

@@ -53,57 +53,52 @@ object PLICConsts
 }
 
 /** Platform-Level Interrupt Controller */
-class TLPLIC(supervisor: Boolean, maxPriorities: Int, address: BigInt = 0xC000000)(implicit p: Parameters) extends LazyModule
+class TLPLIC(maxPriorities: Int, address: BigInt = 0xC000000)(implicit p: Parameters) extends LazyModule
 {
-  val contextsPerHart = if (supervisor) 2 else 1
   require (maxPriorities >= 0)
 
+  // plic0 => max devices 1023
+  val device = new SimpleDevice("interrupt-controller", Seq("riscv,plic0")) {
+    override val alwaysExtended = true
+    override def describe(resources: ResourceBindings): Description = {
+      val Description(name, mapping) = super.describe(resources)
+      val extra = Map(
+        "interrupt-controller" -> Nil,
+        "riscv,ndev" -> Seq(ResourceInt(nDevices)),
+        "#interrupt-cells" -> Seq(ResourceInt(1)),
+        "#address-cells" -> Seq(ResourceInt(0)))
+      Description(name, mapping ++ extra)
+    }
+  }
+
   val node = TLRegisterNode(
     address   = AddressSet(address, PLICConsts.size-1),
+    device    = device,
     beatBytes = p(XLen)/8,
     undefZero = false)
 
   val intnode = IntNexusNode(
     numSourcePorts = 0 to 1024,
     numSinkPorts   = 0 to 1024,
-    sourceFn       = { _ => IntSourcePortParameters(Seq(IntSourceParameters(contextsPerHart))) },
+    sourceFn       = { _ => IntSourcePortParameters(Seq(IntSourceParameters(1, Seq(Resource(device, "int"))))) },
     sinkFn         = { _ => IntSinkPortParameters(Seq(IntSinkParameters())) })
 
   /* Negotiated sizes */
-  def nDevices = intnode.edgesIn.map(_.source.num).sum
+  def nDevices: Int = intnode.edgesIn.map(_.source.num).sum
   def nPriorities = min(maxPriorities, nDevices)
   def nHarts = intnode.edgesOut.map(_.source.num).sum
 
-  def context(i: Int, mode: Char) = mode match {
+  // Assign all the devices unique ranges
-    case 'M' => i * contextsPerHart
+  lazy val sources = intnode.edgesIn.map(_.source)
-    case 'S' => require(supervisor); i * contextsPerHart + 1
+  lazy val flatSources = (sources zip sources.map(_.num).scanLeft(0)(_+_).init).map {
-  }
+    case (s, o) => s.sources.map(z => z.copy(range = z.range.offset(o)))
-  def claimAddr(i: Int, mode: Char)  = address + PLICConsts.hartBase(context(i, mode)) + PLICConsts.claimOffset
+  }.flatten
-  def threshAddr(i: Int, mode: Char) = address + PLICConsts.hartBase(context(i, mode))
-  def enableAddr(i: Int, mode: Char) = address + PLICConsts.enableBase(context(i, mode))
 
-  // Create the global PLIC config string
+  ResourceBinding {
-  lazy val globalConfigString = Seq(
+    flatSources.foreach { s => s.resources.foreach { r =>
-    s"plic {\n",
+      // +1 because interrupt 0 is reserved
-    s"  priority 0x${address.toString(16)};\n",
+      (s.range.start until s.range.end).foreach { i => r.bind(device, ResourceInt(i+1)) }
-    s"  pending 0x${(address + PLICConsts.pendingBase).toString(16)};\n",
+    } }
-    s"  ndevs ${nDevices};\n",
-    s"};\n").mkString
-
-  // Create the per-Hart config string
-  lazy val hartConfigStrings = Seq.tabulate(intnode.edgesOut.size) { i => (Seq(
-    s"      plic {\n",
-    s"        m {\n",
-    s"         ie 0x${enableAddr(i, 'M').toString(16)};\n",
-    s"         thresh 0x${threshAddr(i, 'M').toString(16)};\n",
-    s"         claim 0x${claimAddr(i, 'M').toString(16)};\n",
-    s"        };\n") ++ (if (!supervisor) Seq() else Seq(
-    s"        s {\n",
-    s"         ie 0x${enableAddr(i, 'S').toString(16)};\n",
-    s"         thresh 0x${threshAddr(i, 'S').toString(16)};\n",
-    s"         claim 0x${claimAddr(i, 'S').toString(16)};\n",
-    s"        };\n")) ++ Seq(
-    s"      };\n")).mkString
   }
 
   lazy val module = new LazyModuleImp(this) {
@@ -113,21 +108,17 @@ class TLPLIC(supervisor: Boolean, maxPriorities: Int, address: BigInt = 0xC00000
       val harts = intnode.bundleOut
     }
 
-    // Assign all the devices unique ranges
-    val sources = intnode.edgesIn.map(_.source)
-    val flatSources = (sources zip sources.map(_.num).scanLeft(0)(_+_).init).map {
-      case (s, o) => s.sources.map(z => z.copy(range = z.range.offset(o)))
-    }.flatten
     // Compact the interrupt vector the same way
     val interrupts = (intnode.edgesIn zip io.devices).map { case (e, i) => i.take(e.source.num) }.flatten
     // This flattens the harts into an MSMSMSMSMS... or MMMMM.... sequence
     val harts = io.harts.flatten
 
-    println("\nInterrupt map:")
+    println(s"Interrupt map (${nHarts} harts ${nDevices} interrupts):")
     flatSources.foreach { s =>
       // +1 because 0 is reserved, +1-1 because the range is half-open
       println(s"  [${s.range.start+1}, ${s.range.end}] => ${s.name}")
     }
+    println("")
 
     require (nDevices == interrupts.size)
     require (nHarts == harts.size)

src/main/scala/uncore/devices/Prci.scala

@@ -17,11 +17,6 @@ import tile.XLen
 /** Number of tiles */
 case object NTiles extends Field[Int]
 
-class CoreplexLocalInterrupts extends Bundle {
-  val mtip = Bool()
-  val msip = Bool()
-}
-
 object ClintConsts
 {
   def msipOffset(hart: Int) = hart * msipBytes
@@ -30,24 +25,38 @@ object ClintConsts
   def msipBytes = 4
   def timecmpBytes = 8
   def size = 0x10000
+  def timeWidth = 64
+  def regWidth = 32
+  def ints = 2
 }
 
-trait MixCoreplexLocalInterrupterParameters {
+class CoreplexLocalInterrupter(address: BigInt = 0x02000000)(implicit p: Parameters) extends LazyModule
-  implicit val p: Parameters
+{
+  import ClintConsts._
+
+  // clint0 => at most 4095 devices
+  val device = new SimpleDevice("clint", Seq("riscv,clint0")) {
+    override val alwaysExtended = true
   }
 
-trait CoreplexLocalInterrupterBundle extends Bundle with MixCoreplexLocalInterrupterParameters {
+  val node = TLRegisterNode(
-  val tiles = Vec(p(NTiles), new CoreplexLocalInterrupts).asOutput
+    address   = AddressSet(address, size-1),
+    device    = device,
+    beatBytes = p(XLen)/8)
+
+  val intnode = IntNexusNode(
+    numSourcePorts = 0 to 1024,
+    numSinkPorts   = 0 to 0,
+    sourceFn       = { _ => IntSourcePortParameters(Seq(IntSourceParameters(ints, Seq(Resource(device, "int"))))) },
+    sinkFn         = { _ => IntSinkPortParameters(Seq(IntSinkParameters())) })
+
+  lazy val module = new LazyModuleImp(this) {
+    val io = new Bundle {
       val rtcTick = Bool(INPUT)
+      val int = intnode.bundleOut
+      val in = node.bundleIn
     }
 
-trait CoreplexLocalInterrupterModule extends Module with HasRegMap with MixCoreplexLocalInterrupterParameters {
-  val io: CoreplexLocalInterrupterBundle
-  val address: AddressSet
-
-  val timeWidth = 64
-  val regWidth = 32
-
     val time = Seq.fill(timeWidth/regWidth)(Reg(init=UInt(0, width = regWidth)))
     when (io.rtcTick) {
       val newTime = time.asUInt + UInt(1)
@@ -58,9 +67,9 @@ trait CoreplexLocalInterrupterModule extends Module with HasRegMap with MixCorep
     val timecmp = Seq.fill(p(NTiles)) { Seq.fill(timeWidth/regWidth)(Reg(UInt(width = regWidth))) }
     val ipi = Seq.fill(p(NTiles)) { RegInit(UInt(0, width = 1)) }
 
-  for ((tile, i) <- io.tiles zipWithIndex) {
+    io.int.zipWithIndex.foreach { case (int, i) =>
-    tile.msip := ipi(i)(0)
+      int(0) := ipi(i)(0) // msip
-    tile.mtip := time.asUInt >= timecmp(i).asUInt
+      int(1) := time.asUInt >= timecmp(i).asUInt // mtip
     }
 
     /* 0000 msip hart 0
@@ -73,27 +82,11 @@ trait CoreplexLocalInterrupterModule extends Module with HasRegMap with MixCorep
      * bffc mtime hi
      */
 
-  regmap(
-    0                            -> makeRegFields(ipi),
-    ClintConsts.timecmpOffset(0) -> makeRegFields(timecmp.flatten),
-    ClintConsts.timeOffset       -> makeRegFields(time))
-
     def makeRegFields(s: Seq[UInt]) = s.map(r => RegField(regWidth, r))
-}
 
-/** Power, Reset, Clock, Interrupt */
+    node.regmap(
-// Magic TL2 Incantation to create a TL2 Slave
+      0                -> makeRegFields(ipi),
-class CoreplexLocalInterrupter(address: BigInt = 0x02000000)(implicit p: Parameters)
+      timecmpOffset(0) -> makeRegFields(timecmp.flatten),
-  extends TLRegisterRouter(address, size = ClintConsts.size, beatBytes = p(XLen)/8, undefZero = true)(
+      timeOffset       -> makeRegFields(time))
-  new TLRegBundle((), _)    with CoreplexLocalInterrupterBundle)(
-  new TLRegModule((), _, _) with CoreplexLocalInterrupterModule)
-{
-  val globalConfigString = Seq(
-    s"rtc {\n",
-    s"  addr 0x${(address + ClintConsts.timeOffset).toString(16)};\n",
-    s"};\n").mkString
-  val hartConfigStrings = (0 until p(NTiles)).map { i => Seq(
-    s"      timecmp 0x${(address + ClintConsts.timecmpOffset(i)).toString(16)};\n",
-    s"      ipi 0x${(address + ClintConsts.msipOffset(i)).toString(16)};\n").mkString
   }
 }

src/main/scala/uncore/devices/Rom.scala

@@ -14,8 +14,11 @@ import config._
 
 class TLROM(val base: BigInt, val size: Int, contentsDelayed: => Seq[Byte], executable: Boolean = true, beatBytes: Int = 4)(implicit p: Parameters) extends LazyModule
 {
+  val device = new SimpleDevice("rom", Nil)
+
   val node = TLManagerNode(beatBytes, TLManagerParameters(
     address     = List(AddressSet(base, size-1)),
+    resources   = device.reg,
     regionType  = RegionType.UNCACHED,
     executable  = executable,
     supportsGet = TransferSizes(1, beatBytes),

src/main/scala/uncore/tilelink2/Example.scala

@@ -34,6 +34,7 @@ trait ExampleModule extends HasRegMap
 }
 
 // Create a concrete TL2 version of the abstract Example slave
-class TLExample(params: ExampleParams)(implicit p: Parameters) extends TLRegisterRouter(params.address, 4)(
+class TLExample(params: ExampleParams)(implicit p: Parameters)
+  extends TLRegisterRouter(params.address, "somedev", Seq("ucbbar,random-interface"), 4)(
   new TLRegBundle(params, _)    with ExampleBundle)(
   new TLRegModule(params, _, _) with ExampleModule)

src/main/scala/uncore/tilelink2/IntNodes.scala

@@ -18,6 +18,7 @@ case class IntRange(start: Int, end: Int)
   def overlaps(x: IntRange) = start < x.end && x.start < end
   def offset(x: Int) = IntRange(x+start, x+end)
 }
+
 object IntRange
 {
   implicit def apply(end: Int): IntRange = apply(0, end)
@@ -25,6 +26,7 @@ object IntRange
 
 case class IntSourceParameters(
   range:     IntRange,
+  resources: Seq[Resource] = Seq(),
   nodePath:  Seq[BaseNode] = Seq())
 {
   val name = nodePath.lastOption.map(_.lazyModule.name).getOrElse("disconnected")
@@ -44,8 +46,19 @@ case class IntSourcePortParameters(sources: Seq[IntSourceParameters])
   // The interrupts must perfectly cover the range
   require (sources.isEmpty || sources.map(_.range.end).max == num)
 }
+object IntSourcePortSimple
+{
+  def apply(num: Int = 1, ports: Int = 1, sources: Int = 1, resources: Seq[Resource] = Nil) =
+    if (num == 0) Nil else
+    Seq.fill(ports)(IntSourcePortParameters(Seq.fill(sources)(IntSourceParameters(range = IntRange(0, num), resources = resources))))
+}
 
 case class IntSinkPortParameters(sinks: Seq[IntSinkParameters])
+object IntSinkPortSimple
+{
+  def apply(ports: Int = 1, sinks: Int = 1) =
+    Seq.fill(ports)(IntSinkPortParameters(Seq.fill(sinks)(IntSinkParameters())))
+}
 
 case class IntEdge(source: IntSourcePortParameters, sink: IntSinkPortParameters)
 
@@ -74,10 +87,8 @@ object IntImp extends NodeImp[IntSourcePortParameters, IntSinkPortParameters, In
 }
 
 case class IntIdentityNode() extends IdentityNode(IntImp)
-case class IntSourceNode(num: Int) extends SourceNode(IntImp)(
+case class IntSourceNode(portParams: Seq[IntSourcePortParameters]) extends SourceNode(IntImp)(portParams)
-  if (num == 0) Seq() else Seq(IntSourcePortParameters(Seq(IntSourceParameters(num)))))
+case class IntSinkNode(portParams: Seq[IntSinkPortParameters]) extends SinkNode(IntImp)(portParams)
-case class IntSinkNode() extends SinkNode(IntImp)(
-  Seq(IntSinkPortParameters(Seq(IntSinkParameters()))))
 
 case class IntNexusNode(
   sourceFn:       Seq[IntSourcePortParameters] => IntSourcePortParameters,
@@ -89,11 +100,11 @@ case class IntNexusNode(
 case class IntOutputNode() extends OutputNode(IntImp)
 case class IntInputNode() extends InputNode(IntImp)
 
-case class IntBlindOutputNode() extends BlindOutputNode(IntImp)(Seq(IntSinkPortParameters(Seq(IntSinkParameters()))))
+case class IntBlindOutputNode(portParams: Seq[IntSinkPortParameters]) extends BlindOutputNode(IntImp)(portParams)
-case class IntBlindInputNode(num: Int) extends BlindInputNode(IntImp)(Seq(IntSourcePortParameters(Seq(IntSourceParameters(num)))))
+case class IntBlindInputNode(portParams: Seq[IntSourcePortParameters]) extends BlindInputNode(IntImp)(portParams)
 
-case class IntInternalOutputNode() extends InternalOutputNode(IntImp)(Seq(IntSinkPortParameters(Seq(IntSinkParameters()))))
+case class IntInternalOutputNode(portParams: Seq[IntSinkPortParameters]) extends InternalOutputNode(IntImp)(portParams)
-case class IntInternalInputNode(num: Int) extends InternalInputNode(IntImp)(Seq(IntSourcePortParameters(Seq(IntSourceParameters(num)))))
+case class IntInternalInputNode(portParams: Seq[IntSourcePortParameters]) extends InternalInputNode(IntImp)(portParams)
 
 class IntXbar()(implicit p: Parameters) extends LazyModule
 {
@@ -116,7 +127,7 @@ class IntXbar()(implicit p: Parameters) extends LazyModule
   }
 }
 
-class IntXing()(implicit p: Parameters) extends LazyModule
+class IntXing(sync: Int = 3)(implicit p: Parameters) extends LazyModule
 {
   val intnode = IntIdentityNode()
 
@@ -127,7 +138,7 @@ class IntXing()(implicit p: Parameters) extends LazyModule
     }
 
     (io.in zip io.out) foreach { case (in, out) =>
-      out := RegNext(RegNext(RegNext(in)))
+      out := (0 to sync).foldLeft(in) { case (a, _) => RegNext(a) }
     }
   }
 }

src/main/scala/uncore/tilelink2/Parameters.scala

@@ -9,6 +9,7 @@ import util.RationalDirection
 
 case class TLManagerParameters(
   address:            Seq[AddressSet],
+  resources:          Seq[Resource] = Seq(),
   regionType:         RegionType.T  = RegionType.GET_EFFECTS,
   executable:         Boolean       = false, // processor can execute from this memory
   nodePath:           Seq[BaseNode] = Seq(),
@@ -22,8 +23,7 @@ case class TLManagerParameters(
   supportsPutPartial: TransferSizes = TransferSizes.none,
   supportsHint:       TransferSizes = TransferSizes.none,
   // If fifoId=Some, all accesses sent to the same fifoId are executed and ACK'd in FIFO order
-  fifoId:             Option[Int]   = None,
+  fifoId:             Option[Int]   = None)
-  customDTS:          Option[String]= None)
 {
   require (!address.isEmpty)
   address.foreach { a => require (a.finite) }
@@ -53,20 +53,16 @@ case class TLManagerParameters(
 
   val name = nodePath.lastOption.map(_.lazyModule.name).getOrElse("disconnected")
 
-  // Generate the config string (in future device tree)
-  lazy val dts = customDTS.getOrElse {
-    val header = s"${name} {\n"
-    val middle = address.map { a =>
-      require (a.contiguous) // Config String is not so flexible
-      "  addr 0x%x;\n  size 0x%x;\n".format(a.base, a.mask+1)
-    }
-    val footer = "}\n"
-    header + middle.reduce(_ + _) + footer
-  }
-
   // The device had better not support a transfer larger than it's alignment
   val minAlignment = address.map(_.alignment).min
   require (minAlignment >= maxTransfer)
+
+  def toResource: ResourceAddress = {
+    ResourceAddress(address,
+      r = supportsAcquireB || supportsGet,
+      w = supportsAcquireT || supportsPutFull,
+      x = executable)
+  }
 }
 
 case class TLManagerPortParameters(

src/main/scala/uncore/tilelink2/RegisterRouter.scala

@@ -8,10 +8,18 @@ import diplomacy._
 import regmapper._
 import scala.math.{min,max}
 
-class TLRegisterNode(address: AddressSet, concurrency: Int = 0, beatBytes: Int = 4, undefZero: Boolean = true, executable: Boolean = false)
+class TLRegisterNode(
+    address:     AddressSet,
+    device:      Device,
+    deviceKey:   String  = "reg",
+    concurrency: Int     = 0,
+    beatBytes:   Int     = 4,
+    undefZero:   Boolean = true,
+    executable:  Boolean = false)
   extends TLManagerNode(Seq(TLManagerPortParameters(
     Seq(TLManagerParameters(
       address            = Seq(address),
+      resources          = Seq(Resource(device, deviceKey)),
       executable         = executable,
       supportsGet        = TransferSizes(1, beatBytes),
       supportsPutPartial = TransferSizes(1, beatBytes),
@@ -72,18 +80,26 @@ class TLRegisterNode(address: AddressSet, concurrency: Int = 0, beatBytes: Int =
 
 object TLRegisterNode
 {
-  def apply(address: AddressSet, concurrency: Int = 0, beatBytes: Int = 4, undefZero: Boolean = true, executable: Boolean = false) =
+  def apply(
-    new TLRegisterNode(address, concurrency, beatBytes, undefZero, executable)
+      address:     AddressSet,
+      device:      Device,
+      deviceKey:   String  = "reg",
+      concurrency: Int     = 0,
+      beatBytes:   Int     = 4,
+      undefZero:   Boolean = true,
+      executable:  Boolean = false) =
+    new TLRegisterNode(address, device, deviceKey, concurrency, beatBytes, undefZero, executable)
 }
 
 // These convenience methods below combine to make it possible to create a TL2 
 // 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)(implicit p: Parameters) extends LazyModule
+abstract class TLRegisterRouterBase(devname: String, devcompat: Seq[String], 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 device = new SimpleDevice(devname, devcompat)
-  val intnode = IntSourceNode(interrupts)
+  val node = TLRegisterNode(address, device, "reg", concurrency, beatBytes, undefZero, executable)
+  val intnode = IntSourceNode(IntSourcePortSimple(num = interrupts, resources = Seq(Resource(device, "int"))))
 }
 
 case class TLRegBundleArg(interrupts: util.HeterogeneousBag[Vec[Bool]], in: util.HeterogeneousBag[TLBundle])(implicit val p: Parameters)
@@ -106,11 +122,19 @@ class TLRegModule[P, B <: TLRegBundleBase](val params: P, bundleBuilder: => B, r
   def regmap(mapping: RegField.Map*) = router.node.regmap(mapping:_*)
 }
 
-class TLRegisterRouter[B <: TLRegBundleBase, M <: LazyModuleImp]
+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)
+     val base:        BigInt,
+     val devname:     String,
+     val devcompat:   Seq[String],
+     val interrupts:  Int     = 0,
+     val size:        BigInt  = 4096,
+     val concurrency: Int     = 0,
+     val beatBytes:   Int     = 4,
+     val undefZero:   Boolean = true,
+     val executable:  Boolean = false)
    (bundleBuilder: TLRegBundleArg => B)
    (moduleBuilder: (=> B, TLRegisterRouterBase) => M)(implicit p: Parameters)
-  extends TLRegisterRouterBase(AddressSet(base, size-1), interrupts, concurrency, beatBytes, undefZero, executable)
+  extends TLRegisterRouterBase(devname, devcompat, AddressSet(base, size-1), interrupts, concurrency, beatBytes, undefZero, executable)
 {
   require (isPow2(size))
   // require (size >= 4096) ... not absolutely required, but highly recommended

src/main/scala/uncore/tilelink2/RegisterRouterTest.scala

@@ -214,7 +214,7 @@ trait RRTest0Module extends HasRegMap
   regmap(RRTest0Map.map:_*)
 }
 
-class RRTest0(address: BigInt)(implicit p: Parameters) extends TLRegisterRouter(address, 0, 32, 0, 4)(
+class RRTest0(address: BigInt)(implicit p: Parameters) extends TLRegisterRouter(address, "test0", Nil, 0, 32, 0, 4)(
   new TLRegBundle((), _)    with RRTest0Bundle)(
   new TLRegModule((), _, _) with RRTest0Module)
 
@@ -251,7 +251,7 @@ trait RRTest1Module extends Module with HasRegMap
   regmap(map:_*)
 }
 
-class RRTest1(address: BigInt)(implicit p: Parameters) extends TLRegisterRouter(address, 0, 32, 6, 4)(
+class RRTest1(address: BigInt)(implicit p: Parameters) extends TLRegisterRouter(address, "test1", Nil, 0, 32, 6, 4)(
   new TLRegBundle((), _)    with RRTest1Bundle)(
   new TLRegModule((), _, _) with RRTest1Module)
 

src/main/scala/uncore/tilelink2/SRAM.scala

@@ -9,9 +9,12 @@ import util._
 
 class TLRAM(address: AddressSet, executable: Boolean = true, beatBytes: Int = 4)(implicit p: Parameters) extends LazyModule
 {
+  val device = new MemoryDevice
+
   val node = TLManagerNode(Seq(TLManagerPortParameters(
     Seq(TLManagerParameters(
       address            = List(address),
+      resources          = device.reg,
       regionType         = RegionType.UNCACHED,
       executable         = executable,
       supportsGet        = TransferSizes(1, beatBytes),

src/main/scala/uncore/tilelink2/ToAHB.scala

@@ -19,6 +19,7 @@ case class TLToAHBNode() extends MixedAdapterNode(TLImp, AHBImp)(
     val managers = slaves.map { case s =>
       TLManagerParameters(
         address            = s.address,
+        resources          = s.resources,
         regionType         = s.regionType,
         executable         = s.executable,
         nodePath           = s.nodePath,

src/main/scala/uncore/tilelink2/ToAPB.scala

@@ -19,6 +19,7 @@ case class TLToAPBNode() extends MixedAdapterNode(TLImp, APBImp)(
     val managers = slaves.map { case s =>
       TLManagerParameters(
         address            = s.address,
+        resources          = s.resources,
         regionType         = s.regionType,
         executable         = s.executable,
         nodePath           = s.nodePath,

src/main/scala/uncore/tilelink2/ToAXI4.scala

@@ -23,6 +23,7 @@ case class TLToAXI4Node(idBits: Int) extends MixedAdapterNode(TLImp, AXI4Imp)(
     managers = p.slaves.map { case s =>
       TLManagerParameters(
         address            = s.address,
+        resources          = s.resources,
         regionType         = s.regionType,
         executable         = s.executable,
         nodePath           = s.nodePath,

src/main/scala/uncore/tilelink2/Zero.scala

@@ -8,9 +8,12 @@ import diplomacy._
 
 class TLZero(address: AddressSet, executable: Boolean = true, beatBytes: Int = 4)(implicit p: Parameters) extends LazyModule
 {
+  val device = new SimpleDevice("rom", Seq("ucbbar,cacheable-zero"))
+
   val node = TLManagerNode(Seq(TLManagerPortParameters(
     Seq(TLManagerParameters(
       address            = List(address),
+      resources          = device.reg,
       regionType         = RegionType.UNCACHED,
       executable         = executable,
       supportsGet        = TransferSizes(1, beatBytes),