From 0b950b5938bb9e0443f5d6973db8e1e0a131dd93 Mon Sep 17 00:00:00 2001
From: "Wesley W. Terpstra" <wesley@sifive.com>
Date: Tue, 28 Feb 2017 22:34:24 -0800
Subject: [PATCH] coreplex: bind assigned resources

---
 src/main/scala/coreplex/BaseCoreplex.scala    |  2 +-
 src/main/scala/coreplex/CoreplexNetwork.scala | 48 +++++++++++++++++++
 src/main/scala/coreplex/RISCVPlatform.scala   |  5 ++
 3 files changed, 54 insertions(+), 1 deletion(-)

diff --git a/src/main/scala/coreplex/BaseCoreplex.scala b/src/main/scala/coreplex/BaseCoreplex.scala
index 3188e15b..e0333128 100644
--- a/src/main/scala/coreplex/BaseCoreplex.scala
+++ b/src/main/scala/coreplex/BaseCoreplex.scala
@@ -55,7 +55,7 @@ trait HasCoreplexParameters {
 
 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
diff --git a/src/main/scala/coreplex/CoreplexNetwork.scala b/src/main/scala/coreplex/CoreplexNetwork.scala
index d4b700aa..0171a939 100644
--- a/src/main/scala/coreplex/CoreplexNetwork.scala
+++ b/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 {
diff --git a/src/main/scala/coreplex/RISCVPlatform.scala b/src/main/scala/coreplex/RISCVPlatform.scala
index bbba0bd0..e375ab14 100644
--- a/src/main/scala/coreplex/RISCVPlatform.scala
+++ b/src/main/scala/coreplex/RISCVPlatform.scala
@@ -28,6 +28,8 @@ trait CoreplexRISCVPlatform extends CoreplexNetwork {
     val managers = l1tol2.node.edgesIn(0).manager.managers
     rocketchip.GenerateConfigString(p, clint, plic, managers)
   }
+
+  lazy val dts = DTS(bindingTree)
 }
 
 trait CoreplexRISCVPlatformBundle extends CoreplexNetworkBundle {
@@ -52,4 +54,7 @@ trait CoreplexRISCVPlatformModule extends CoreplexNetworkModule {
 
   println(s"\nGenerated Configuration String\n${outer.configString}")
   ElaborationArtefacts.add("cfg", outer.configString)
+
+  println(outer.dts)
+  ElaborationArtefacts.add("dts", outer.dts)
 }