Fix support for no-bootROM systems (#1458)

2023-05-03 18:23:36 -07:00
parent 1cc5ea5192
commit b05f36df79
1 changed files with 8 additions and 0 deletions
--- a/generators/chipyard/src/main/scala/System.scala
+++ b/generators/chipyard/src/main/scala/System.scala
@@ -31,6 +31,14 @@ class ChipyardSystem(implicit p: Parameters) extends ChipyardSubsystem

  val bootROM  = p(BootROMLocated(location)).map { BootROM.attach(_, this, CBUS) }
  val maskROMs = p(MaskROMLocated(location)).map { MaskROM.attach(_, this, CBUS) }
+
+  // If there is no bootrom, the tile reset vector bundle will be tied to zero
+  if (bootROM.isEmpty) {
+    val fakeResetVectorSourceNode = BundleBridgeSource[UInt]()
+    InModuleBody { fakeResetVectorSourceNode.bundle := 0.U }
+    tileResetVectorNexusNode := fakeResetVectorSourceNode
+  }
+
  override lazy val module = new ChipyardSystemModule(this)
 }