diff --git a/src/main/scala/diplomacy/AddressRange.scala b/src/main/scala/diplomacy/AddressRange.scala
new file mode 100644
index 00000000..9df91417
--- /dev/null
+++ b/src/main/scala/diplomacy/AddressRange.scala
@@ -0,0 +1,75 @@
+// See LICENSE.SiFive for license details.
+
+package freechips.rocketchip.diplomacy
+
+import Chisel._
+
+// 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, s"AddressRange base must be positive, got: $base")
+  require (size > 0, s"AddressRange size must be > 0, got: $size")
+
+  def compare(x: AddressRange) = {
+    val primary   = (this.base - x.base).signum
+    val secondary = (x.size - this.size).signum
+    if (primary != 0) primary else secondary
+  }
+
+  def contains(x: AddressRange) = base <= x.base && x.end <= end
+  def union(x: AddressRange): Option[AddressRange] = {
+    if (base > x.end || x.base > end) {
+      None
+    } else {
+      val obase = if (base < x.base) base else x.base
+      val oend  = if (end  > x.end)  end  else x.end
+      Some(AddressRange(obase, oend-obase))
+    }
+  }
+
+  private def helper(base: BigInt, end: BigInt) =
+    if (base < end) Seq(AddressRange(base, end-base)) else Nil
+  def subtract(x: AddressRange) =
+    helper(base, end min x.base) ++ helper(base max x.end, end)
+
+  // We always want to see things in hex
+  override def toString() = "AddressRange(0x%x, 0x%x)".format(base, size)
+}
+
+object AddressRange
+{
+  def fromSets(seq: Seq[AddressSet]): Seq[AddressRange] = unify(seq.flatMap(_.toRanges))
+  def unify(seq: Seq[AddressRange]): Seq[AddressRange] = {
+    if (seq.isEmpty) return Nil
+    val ranges = seq.sorted
+    ranges.tail.foldLeft(Seq(ranges.head)) { case (head :: tail, x) =>
+      head.union(x) match {
+        case Some(z) => z :: tail
+        case None => x :: head :: tail
+      }
+    }.reverse
+  }
+  // Set subtraction... O(n*n) b/c I am lazy
+  def subtract(from: Seq[AddressRange], take: Seq[AddressRange]): Seq[AddressRange] =
+    take.foldLeft(from) { case (left, r) => left.flatMap { _.subtract(r) } }
+}
+
+case class AddressMapEntry(range: AddressRange, permissions: ResourcePermissions, names: Seq[String]) {
+  val ResourcePermissions(r, w, x, c, a) = permissions
+
+  def toString(aw: Int) = s"\t%${aw}x - %${aw}x %c%c%c%c%c %s".format(
+    range.base,
+    range.base+range.size,
+    if (a) 'A' else ' ',
+    if (r) 'R' else ' ',
+    if (w) 'W' else ' ',
+    if (x) 'X' else ' ',
+    if (c) 'C' else ' ',
+    names.mkString(", "))
+
+  def serialize = s"""{"base":[${range.base}],"size":[${range.size}],""" +
+    s""""r":[$r],"w":[$w],"x":[$x],"c":[$c],"a":[$a],""" +
+    s""""names":[${names.map('"'+_+'"').mkString(",")}]}"""
+}
diff --git a/src/main/scala/diplomacy/Parameters.scala b/src/main/scala/diplomacy/Parameters.scala
index 4133b52f..95110582 100644
--- a/src/main/scala/diplomacy/Parameters.scala
+++ b/src/main/scala/diplomacy/Parameters.scala
@@ -104,40 +104,6 @@ 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, s"AddressRange base must be positive, got: $base")
-  require (size > 0, s"AddressRange size must be > 0, got: $size")
-
-  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))
-    }
-  }
-
-  private def helper(base: BigInt, end: BigInt) =
-    if (base < end) Seq(AddressRange(base, end-base)) else Nil
-  def subtract(x: AddressRange) =
-    helper(base, end min x.base) ++ helper(base max x.end, end)
-
-  // We always want to see things in hex
-  override def toString() = "AddressRange(0x%x, 0x%x)".format(base, size)
-}
-
 // 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
@@ -210,24 +176,6 @@ case class AddressSet(base: BigInt, mask: BigInt) extends Ordered[AddressSet]
   }
 }
 
-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
-  }
-  // Set subtraction... O(n*n) b/c I am lazy
-  def subtract(from: Seq[AddressRange], take: Seq[AddressRange]): Seq[AddressRange] =
-    take.foldLeft(from) { case (left, r) => left.flatMap { _.subtract(r) } }
-}
-
 object AddressSet
 {
   val everything = AddressSet(0, -1)
diff --git a/src/main/scala/diplomacy/Resources.scala b/src/main/scala/diplomacy/Resources.scala
index 58ba6415..a8442d6f 100644
--- a/src/main/scala/diplomacy/Resources.scala
+++ b/src/main/scala/diplomacy/Resources.scala
@@ -251,6 +251,15 @@ trait BindingScope
     }
   }
 
+  private def collect(path: List[String], value: ResourceValue): List[(String, ResourceAddress)] = {
+    value match {
+      case r: ResourceAddress => List((path(1), r))
+      case b: ResourceMapping => List((path(1), ResourceAddress(b.address, b.permissions)))
+      case ResourceMap(value, _) => value.toList.flatMap { case (key, seq) => seq.flatMap(r => collect(key :: path, r)) }
+      case _ => Nil
+    }
+  }
+
   /** Generate the device tree. */
   def bindingTree: ResourceMap = {
     eval
@@ -263,6 +272,9 @@ trait BindingScope
       expand(tokens, Seq(ResourceMap(mapping, Seq(d.label)))) })
     ResourceMap(SortedMap("/" -> tree))
   }
+
+  /** Collect resource addresses from tree. */
+  def collectResourceAddresses = collect(Nil, bindingTree)
 }
 
 object BindingScope
diff --git a/src/main/scala/subsystem/BaseSubsystem.scala b/src/main/scala/subsystem/BaseSubsystem.scala
index 8ff54586..2df929c7 100644
--- a/src/main/scala/subsystem/BaseSubsystem.scala
+++ b/src/main/scala/subsystem/BaseSubsystem.scala
@@ -97,39 +97,22 @@ abstract class BaseSubsystem(implicit p: Parameters) extends BareSubsystem {
   }
 }
 
-abstract class BaseSubsystemModuleImp[+L <: BaseSubsystem](_outer: L) extends BareSubsystemModuleImp(_outer) {
-  println("Generated Address Map")
-  private val aw = (outer.sbus.busView.bundle.addressBits-1)/4 + 1
-  private val fmt = s"\t%${aw}x - %${aw}x %c%c%c%c%c %s"
 
-  private def collect(path: List[String], value: ResourceValue): List[(String, ResourceAddress)] = {
-    value match {
-      case r: ResourceAddress => List((path(1), r))
-      case b: ResourceMapping => List((path(1), ResourceAddress(b.address, b.permissions)))
-      case ResourceMap(value, _) => value.toList.flatMap { case (key, seq) => seq.flatMap(r => collect(key :: path, r)) }
-      case _ => Nil
-    }
-  }
-  private val ranges = collect(Nil, outer.bindingTree).groupBy(_._2).toList.flatMap { case (key, seq) =>
-    AddressRange.fromSets(key.address).map { r => (r, key.permissions, seq.map(_._1)) }
-  }.sortBy(_._1)
-  private val json = ranges.map { case (range, ResourcePermissions(r, w, x, c, a), names) =>
-    println(fmt.format(
-      range.base,
-      range.base+range.size,
-      if (a) 'A' else ' ',
-      if (r) 'R' else ' ',
-      if (w) 'W' else ' ',
-      if (x) 'X' else ' ',
-      if (c) 'C' else ' ',
-      names.mkString(", ")))
-    s"""{"base":[${range.base}],"size":[${range.size}],"r":[$r],"w":[$w],"x":[$x],"c":[$c],"a":[$a],"names":[${names.map('"'+_+'"').mkString(",")}]}"""
+abstract class BaseSubsystemModuleImp[+L <: BaseSubsystem](_outer: L) extends BareSubsystemModuleImp(_outer) {
+  private val mapping: Seq[AddressMapEntry] = {
+    outer.collectResourceAddresses.groupBy(_._2).toList.flatMap { case (key, seq) =>
+      AddressRange.fromSets(key.address).map { r => AddressMapEntry(r, key.permissions, seq.map(_._1)) }
+    }.sortBy(_.range)
   }
+
+  println("Generated Address Map")
+  mapping.map(entry => println(entry.toString((outer.sbus.busView.bundle.addressBits-1)/4 + 1)))
   println("")
-  ElaborationArtefacts.add("memmap.json", s"""{"mapping":[${json.mkString(",")}]}""")
+
+  ElaborationArtefacts.add("memmap.json", s"""{"mapping":[${mapping.map(_.serialize).mkString(",")}]}""")
 
   // Confirm that all of memory was described by DTS
-  private val dtsRanges = AddressRange.unify(ranges.map(_._1))
+  private val dtsRanges = AddressRange.unify(mapping.map(_.range))
   private val allRanges = AddressRange.unify(outer.topManagers.get.flatMap { m => AddressRange.fromSets(m.address) })
 
   if (dtsRanges != allRanges) {