From: Ali Saidi <Ali.Saidi@ARM.com>
Date: Fri, 29 Jun 2012 15:18:29 +0000 (-0400)
Subject: Cache: Only invalidate a line in the cache when an uncacheable write is seen.
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=8d1e56bdcd673fd3b1ddfd9ac82f7c1ded3110c4;p=gem5.git

Cache: Only invalidate a line in the cache when an uncacheable write is seen.
---

diff --git a/src/mem/cache/cache_impl.hh b/src/mem/cache/cache_impl.hh
index fec0a6222..2329b2ea6 100644
--- a/src/mem/cache/cache_impl.hh
+++ b/src/mem/cache/cache_impl.hh
@@ -275,7 +275,7 @@ Cache<TagStore>::access(PacketPtr pkt, BlkType *&blk,
     if (pkt->req->isUncacheable()) {
         if (pkt->req->isClearLL()) {
             tags->clearLocks();
-        } else {
+        } else if (pkt->isWrite()) {
            blk = tags->findBlock(pkt->getAddr());
            if (blk != NULL) {
                tags->invalidateBlk(blk);
@@ -439,7 +439,7 @@ Cache<TagStore>::timingAccess(PacketPtr pkt)
     if (pkt->req->isUncacheable()) {
         if (pkt->req->isClearLL()) {
             tags->clearLocks();
-        } else {
+        } else if (pkt->isWrite()) {
             BlkType *blk = tags->findBlock(pkt->getAddr());
             if (blk != NULL) {
                 tags->invalidateBlk(blk);