diff --git a/generators/chipyard/src/main/scala/config/fragments/TileFragments.scala b/generators/chipyard/src/main/scala/config/fragments/TileFragments.scala
index 17eaa3f0..abd26769 100644
--- a/generators/chipyard/src/main/scala/config/fragments/TileFragments.scala
+++ b/generators/chipyard/src/main/scala/config/fragments/TileFragments.scala
@@ -66,6 +66,15 @@ class WithNPMPs(n: Int = 8) extends Config((site, here, up) => {
   }
 })
 
+class WithRocketCacheRowBits(rowBits: Int = 64) extends Config((site, here, up) => {
+  case TilesLocated(InSubsystem) => up(TilesLocated(InSubsystem)) map {
+    case tp: RocketTileAttachParams => tp.copy(tileParams = tp.tileParams.copy(
+      dcache = tp.tileParams.dcache.map(_.copy(rowBits = rowBits)),
+      icache = tp.tileParams.icache.map(_.copy(rowBits = rowBits))
+    ))
+  }
+})
+
 class WithRocketICacheScratchpad extends Config((site, here, up) => {
   case TilesLocated(InSubsystem) => up(TilesLocated(InSubsystem), site) map {
     case tp: RocketTileAttachParams => tp.copy(tileParams = tp.tileParams.copy(