From 5940dfff14b76ba1000afb4fef5b72a50dc77517 Mon Sep 17 00:00:00 2001
From: Jerry Zhao <jerryz123@berkeley.edu>
Date: Mon, 7 Oct 2019 17:27:47 -0700
Subject: [PATCH] [system] Comment on hart-ordering restriction

---
 generators/utilities/src/main/scala/Subsystem.scala | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/generators/utilities/src/main/scala/Subsystem.scala b/generators/utilities/src/main/scala/Subsystem.scala
index e3755704..560caa4c 100644
--- a/generators/utilities/src/main/scala/Subsystem.scala
+++ b/generators/utilities/src/main/scala/Subsystem.scala
@@ -46,6 +46,8 @@ trait HasBoomAndRocketTiles extends HasTiles
   // Note that we also inject new nodes into the tile itself,
   // also based on the crossing type.
   // This MUST be performed in order of hartid
+  // There is something weird with registering tile-local interrupt controllers to the CLINT.
+  // TODO: investigate why
   val tiles = allTilesInfo.sortWith(_._1.hartId < _._1.hartId).map {
     case (param, crossing) => {
       val (tile, rocketLogicalTree) = param match {