First cut at LL/SC support in caches (atomic mode only).

[gem5.git] / src / mem / cache / base_cache.hh

diff --git a/src/mem/cache/base_cache.hh b/src/mem/cache/base_cache.hh
index 41c28f3a1f367c631df58f5448ac2e6c55e9883a..93830b04fd7cc843a37a1da0bbfc27153c90d30d 100644 (file)
--- a/src/mem/cache/base_cache.hh
+++ b/src/mem/cache/base_cache.hh
@@ -58,7 +58,6 @@ enum BlockedCause{
     Blocked_NoTargets,
     Blocked_NoWBBuffers,
     Blocked_Coherence,
-    Blocked_Copy,
     NUM_BLOCKED_CAUSES
 };
 
@@ -116,7 +115,6 @@ class BaseCache : public MemObject
 
         std::list<Packet *> drainList;
 
-        Packet *cshrRetry;
     };
 
     struct CacheEvent : public Event
@@ -188,6 +186,12 @@ class BaseCache : public MemObject
         fatal("No implementation");
     }
 
+    virtual void sendCoherenceResult(Packet* &pkt, MSHR* mshr, bool success)
+    {
+
+        fatal("No implementation");
+    }
+
     /**
      * Bit vector of the blocking reasons for the access path.
      * @sa #BlockedCause
@@ -212,10 +216,6 @@ class BaseCache : public MemObject
 
   protected:
 
-    /** True if this cache is connected to the CPU. */
-    bool topLevelCache;
-
-
     /** Stores time the cache blocked for statistics. */
     Tick blockedCycle;
 
@@ -337,7 +337,7 @@ class BaseCache : public MemObject
      */
     BaseCache(const std::string &name, Params &params)
         : MemObject(name), blocked(0), blockedSnoop(0), masterRequests(0),
-          slaveRequests(0), topLevelCache(false),  blkSize(params.blkSize),
+          slaveRequests(0), blkSize(params.blkSize),
           missCount(params.maxMisses)
     {
         //Start ports at null if more than one is created we should panic
@@ -357,15 +357,6 @@ class BaseCache : public MemObject
         return blkSize;
     }
 
-    /**
-     * Returns true if this cache is connect to the CPU.
-     * @return True if this is a L1 cache.
-     */
-    bool isTopLevel()
-    {
-        return topLevelCache;
-    }
-
     /**
      * Returns true if the cache is blocked for accesses.
      */
@@ -467,7 +458,7 @@ class BaseCache : public MemObject
      */
     void setMasterRequest(RequestCause cause, Tick time)
     {
-        if (!doMasterRequest() && memSidePort->drainList.empty())
+        if (!doMasterRequest() && !memSidePort->waitingOnRetry)
         {
             BaseCache::CacheEvent * reqCpu = new BaseCache::CacheEvent(memSidePort);
             reqCpu->schedule(time);
@@ -502,10 +493,13 @@ class BaseCache : public MemObject
      */
     void setSlaveRequest(RequestCause cause, Tick time)
     {
+        if (!doSlaveRequest() && !cpuSidePort->waitingOnRetry)
+        {
+            BaseCache::CacheEvent * reqCpu = new BaseCache::CacheEvent(cpuSidePort);
+            reqCpu->schedule(time);
+        }
         uint8_t flag = 1<<cause;
         slaveRequests |= flag;
-        assert("Implement\n" && 0);
-//     si->pktuest(time);
     }
 
     /**
@@ -530,8 +524,11 @@ class BaseCache : public MemObject
             reqCpu->schedule(time);
         }
         else {
-            if (pkt->cmd == Packet::Writeback) delete pkt->req;
-            delete pkt;
+            if (pkt->cmd != Packet::UpgradeReq)
+            {
+                delete pkt->req;
+                delete pkt;
+            }
         }
     }
 
@@ -550,8 +547,11 @@ class BaseCache : public MemObject
             reqCpu->schedule(time);
         }
         else {
-            if (pkt->cmd == Packet::Writeback) delete pkt->req;
-            delete pkt;
+            if (pkt->cmd != Packet::UpgradeReq)
+            {
+                delete pkt->req;
+                delete pkt;
+            }
         }
     }
 
@@ -561,8 +561,6 @@ class BaseCache : public MemObject
      */
     void respondToSnoop(Packet *pkt, Tick time)
     {
-//        assert("Implement\n" && 0);
-//     mi->respond(pkt,curTick + hitLatency);
         assert (pkt->needsResponse());
         CacheEvent *reqMem = new CacheEvent(memSidePort, pkt);
         reqMem->schedule(time);
@@ -585,15 +583,7 @@ class BaseCache : public MemObject
         {
             //This is where snoops get updated
             AddrRangeList dummy;
-//            if (!topLevelCache)
-//            {
-                cpuSidePort->getPeerAddressRanges(dummy, snoop);
-//            }
-//            else
-//            {
-//                snoop.push_back(RangeSize(0,-1));
-//            }
-
+            cpuSidePort->getPeerAddressRanges(dummy, snoop);
             return;
         }
     }