From 584eba3ab66c8f95e2344cf7115ec2fb13604eb1 Mon Sep 17 00:00:00 2001
From: Lena Olson <lena@cs.wisc.edu>
Date: Tue, 11 Sep 2012 14:14:49 -0400
Subject: Cache: Split invalidateBlk up to seperate block vs. tags

This seperates the functionality to clear the state in a block into
blk.hh and the functionality to udpate the tag information into the
tags.  This gets rid of the case where calling invalidateBlk on an
already-invalid block does something different than calling it on a
valid block, which was confusing.
---
 src/mem/cache/tags/lru.cc | 32 +++++++++++++++-----------------
 1 file changed, 15 insertions(+), 17 deletions(-)

(limited to 'src/mem/cache/tags/lru.cc')

diff --git a/src/mem/cache/tags/lru.cc b/src/mem/cache/tags/lru.cc
index c73f557b9..8d32d4b35 100644
--- a/src/mem/cache/tags/lru.cc
+++ b/src/mem/cache/tags/lru.cc
@@ -92,7 +92,7 @@ LRU::LRU(unsigned _numSets, unsigned _blkSize, unsigned _assoc,
             ++blkIndex;
 
             // invalidate new cache block
-            blk->status = 0;
+            blk->invalidate();
 
             //EGH Fix Me : do we need to initialize blk?
 
@@ -186,8 +186,11 @@ LRU::insertBlock(Addr addr, BlkType *blk, int master_id)
         // deal with evicted block
         assert(blk->srcMasterId < cache->system->maxMasters());
         occupancies[blk->srcMasterId]--;
+
+        blk->invalidate();
     }
 
+    blk->isTouched = true;
     // Set tag for new block.  Caller is responsible for setting status.
     blk->tag = extractTag(addr);
 
@@ -201,23 +204,18 @@ LRU::insertBlock(Addr addr, BlkType *blk, int master_id)
 }
 
 void
-LRU::invalidateBlk(BlkType *blk)
+LRU::invalidate(BlkType *blk)
 {
-    if (blk) {
-        if (blk->isValid()) {
-            tagsInUse--;
-            assert(blk->srcMasterId < cache->system->maxMasters());
-            occupancies[blk->srcMasterId]--;
-            blk->srcMasterId = Request::invldMasterId;
-        }
-        blk->status = 0;
-        blk->isTouched = false;
-        blk->clearLoadLocks();
-
-        // should be evicted before valid blocks
-        unsigned set = blk->set;
-        sets[set].moveToTail(blk);
-    }
+    assert(blk);
+    assert(blk->isValid());
+    tagsInUse--;
+    assert(blk->srcMasterId < cache->system->maxMasters());
+    occupancies[blk->srcMasterId]--;
+    blk->srcMasterId = Request::invldMasterId;
+
+    // should be evicted before valid blocks
+    unsigned set = blk->set;
+    sets[set].moveToTail(blk);
 }
 
 void
-- 
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