From 27c674972cac718eebe1f15bb06215d626b3324a Mon Sep 17 00:00:00 2001
From: Howard Mao <zhehao.mao@gmail.com>
Date: Wed, 31 Aug 2016 09:44:32 -0700
Subject: [PATCH] tie off invalidate_lr in RoCC

---
 src/main/scala/rocket/rocc.scala | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/main/scala/rocket/rocc.scala b/src/main/scala/rocket/rocc.scala
index d53979cd..ea1b577f 100644
--- a/src/main/scala/rocket/rocc.scala
+++ b/src/main/scala/rocket/rocc.scala
@@ -58,6 +58,7 @@ class RoCCInterface(implicit p: Parameters) extends CoreBundle()(p) {
 abstract class RoCC(implicit p: Parameters) extends CoreModule()(p) {
   val io = new RoCCInterface
   io.mem.req.bits.phys := Bool(true) // don't perform address translation
+  io.mem.invalidate_lr := Bool(false) // don't mess with LR/SC
 }
 
 class AccumulatorExample(n: Int = 4)(implicit p: Parameters) extends RoCC()(p) {