Split BaseCache::CacheEvent into RequestEvent and ResponseEvent.

Compiles but not tested.

--HG--
extra : convert_revision : 4e1e28c4b87721ccfcf35a5ea62c1fa324acbaf9

3 files changed, 112 insertions, 107 deletions

diff --git a/src/mem/cache/base_cache.cc b/src/mem/cache/base_cache.cc
index ed665dafb..60e8028e8 100644
--- a/src/mem/cache/base_cache.cc
+++ b/src/mem/cache/base_cache.cc
@@ -134,8 +134,7 @@ BaseCache::CachePort::recvRetry()
                 isCpuSide && cache->doSlaveRequest()) {
 
                 DPRINTF(CachePort, "%s has more responses/requests\n", name());
-                BaseCache::CacheEvent * reqCpu = new BaseCache::CacheEvent(this, false);
-                reqCpu->schedule(curTick + 1);
+                new BaseCache::RequestEvent(this, curTick + 1);
             }
             waitingOnRetry = false;
         }
@@ -178,8 +177,7 @@ BaseCache::CachePort::recvRetry()
         {
             DPRINTF(CachePort, "%s has more requests\n", name());
             //Still more to issue, rerequest in 1 cycle
-            BaseCache::CacheEvent * reqCpu = new BaseCache::CacheEvent(this, false);
-            reqCpu->schedule(curTick + 1);
+            new BaseCache::RequestEvent(this, curTick + 1);
         }
     }
     else
@@ -196,8 +194,7 @@ BaseCache::CachePort::recvRetry()
         {
             DPRINTF(CachePort, "%s has more requests\n", name());
             //Still more to issue, rerequest in 1 cycle
-            BaseCache::CacheEvent * reqCpu = new BaseCache::CacheEvent(this, false);
-            reqCpu->schedule(curTick + 1);
+            new BaseCache::RequestEvent(this, curTick + 1);
         }
     }
     if (waitingOnRetry) DPRINTF(CachePort, "%s STILL Waiting on retry\n", name());
@@ -228,99 +225,110 @@ BaseCache::CachePort::clearBlocked()
     }
 }
 
-BaseCache::CacheEvent::CacheEvent(CachePort *_cachePort, bool _newResponse)
-    : Event(&mainEventQueue, CPU_Tick_Pri), cachePort(_cachePort),
-      newResponse(_newResponse)
+BaseCache::RequestEvent::RequestEvent(CachePort *_cachePort, Tick when)
+    : Event(&mainEventQueue, CPU_Tick_Pri), cachePort(_cachePort)
 {
-    if (!newResponse)
-        this->setFlags(AutoDelete);
+    this->setFlags(AutoDelete);
     pkt = NULL;
+    schedule(when);
 }
 
 void
-BaseCache::CacheEvent::process()
+BaseCache::RequestEvent::process()
 {
-    if (!newResponse)
-    {
-        if (cachePort->waitingOnRetry) return;
-       //We have some responses to drain first
-        if (!cachePort->drainList.empty()) {
-            DPRINTF(CachePort, "%s trying to drain a response\n", cachePort->name());
-            if (cachePort->sendTiming(cachePort->drainList.front())) {
-                DPRINTF(CachePort, "%s drains a response succesfully\n", cachePort->name());
-                cachePort->drainList.pop_front();
-                if (!cachePort->drainList.empty() ||
-                    !cachePort->isCpuSide && cachePort->cache->doMasterRequest() ||
-                    cachePort->isCpuSide && cachePort->cache->doSlaveRequest()) {
-
-                    DPRINTF(CachePort, "%s still has outstanding bus reqs\n", cachePort->name());
-                    this->schedule(curTick + 1);
-                }
-            }
-            else {
-                cachePort->waitingOnRetry = true;
-                DPRINTF(CachePort, "%s now waiting on a retry\n", cachePort->name());
+    if (cachePort->waitingOnRetry) return;
+    //We have some responses to drain first
+    if (!cachePort->drainList.empty()) {
+        DPRINTF(CachePort, "%s trying to drain a response\n", cachePort->name());
+        if (cachePort->sendTiming(cachePort->drainList.front())) {
+            DPRINTF(CachePort, "%s drains a response succesfully\n", cachePort->name());
+            cachePort->drainList.pop_front();
+            if (!cachePort->drainList.empty() ||
+                !cachePort->isCpuSide && cachePort->cache->doMasterRequest() ||
+                cachePort->isCpuSide && cachePort->cache->doSlaveRequest()) {
+
+                DPRINTF(CachePort, "%s still has outstanding bus reqs\n", cachePort->name());
+                this->schedule(curTick + 1);
             }
         }
-        else if (!cachePort->isCpuSide)
-        {            //MSHR
-            DPRINTF(CachePort, "%s trying to send a MSHR request\n", cachePort->name());
-            if (!cachePort->cache->doMasterRequest()) {
-                //This can happen if I am the owner of a block and see an upgrade
-                //while the block was in my WB Buffers.  I just remove the
-                //wb and de-assert the masterRequest
-                return;
-            }
+        else {
+            cachePort->waitingOnRetry = true;
+            DPRINTF(CachePort, "%s now waiting on a retry\n", cachePort->name());
+        }
+    }
+    else if (!cachePort->isCpuSide)
+    {            //MSHR
+        DPRINTF(CachePort, "%s trying to send a MSHR request\n", cachePort->name());
+        if (!cachePort->cache->doMasterRequest()) {
+            //This can happen if I am the owner of a block and see an upgrade
+            //while the block was in my WB Buffers.  I just remove the
+            //wb and de-assert the masterRequest
+            return;
+        }
 
-            pkt = cachePort->cache->getPacket();
-            MSHR* mshr = (MSHR*) pkt->senderState;
-            //Copy the packet, it may be modified/destroyed elsewhere
-            PacketPtr copyPkt = new Packet(*pkt);
-            copyPkt->dataStatic<uint8_t>(pkt->getPtr<uint8_t>());
-            mshr->pkt = copyPkt;
+        pkt = cachePort->cache->getPacket();
+        MSHR* mshr = (MSHR*) pkt->senderState;
+        //Copy the packet, it may be modified/destroyed elsewhere
+        PacketPtr copyPkt = new Packet(*pkt);
+        copyPkt->dataStatic<uint8_t>(pkt->getPtr<uint8_t>());
+        mshr->pkt = copyPkt;
 
-            bool success = cachePort->sendTiming(pkt);
-            DPRINTF(Cache, "Address %x was %s in sending the timing request\n",
-                    pkt->getAddr(), success ? "succesful" : "unsuccesful");
+        bool success = cachePort->sendTiming(pkt);
+        DPRINTF(Cache, "Address %x was %s in sending the timing request\n",
+                pkt->getAddr(), success ? "succesful" : "unsuccesful");
 
-            cachePort->waitingOnRetry = !success;
-            if (cachePort->waitingOnRetry) {
-                DPRINTF(CachePort, "%s now waiting on a retry\n", cachePort->name());
-            }
+        cachePort->waitingOnRetry = !success;
+        if (cachePort->waitingOnRetry) {
+            DPRINTF(CachePort, "%s now waiting on a retry\n", cachePort->name());
+        }
 
-            cachePort->cache->sendResult(pkt, mshr, success);
-            if (success && cachePort->cache->doMasterRequest())
-            {
-                DPRINTF(CachePort, "%s still more MSHR requests to send\n",
-                        cachePort->name());
-                //Still more to issue, rerequest in 1 cycle
-                pkt = NULL;
-                this->schedule(curTick+1);
-            }
+        cachePort->cache->sendResult(pkt, mshr, success);
+        if (success && cachePort->cache->doMasterRequest())
+        {
+            DPRINTF(CachePort, "%s still more MSHR requests to send\n",
+                    cachePort->name());
+            //Still more to issue, rerequest in 1 cycle
+            pkt = NULL;
+            this->schedule(curTick+1);
         }
-        else
+    }
+    else
+    {
+        //CSHR
+        assert(cachePort->cache->doSlaveRequest());
+        pkt = cachePort->cache->getCoherencePacket();
+        MSHR* cshr = (MSHR*) pkt->senderState;
+        bool success = cachePort->sendTiming(pkt);
+        cachePort->cache->sendCoherenceResult(pkt, cshr, success);
+        cachePort->waitingOnRetry = !success;
+        if (cachePort->waitingOnRetry)
+            DPRINTF(CachePort, "%s now waiting on a retry\n", cachePort->name());
+        if (success && cachePort->cache->doSlaveRequest())
         {
-            //CSHR
-            assert(cachePort->cache->doSlaveRequest());
-            pkt = cachePort->cache->getCoherencePacket();
-            MSHR* cshr = (MSHR*) pkt->senderState;
-            bool success = cachePort->sendTiming(pkt);
-            cachePort->cache->sendCoherenceResult(pkt, cshr, success);
-            cachePort->waitingOnRetry = !success;
-            if (cachePort->waitingOnRetry)
-                DPRINTF(CachePort, "%s now waiting on a retry\n", cachePort->name());
-            if (success && cachePort->cache->doSlaveRequest())
-            {
-                DPRINTF(CachePort, "%s still more CSHR requests to send\n",
-                        cachePort->name());
-                //Still more to issue, rerequest in 1 cycle
-                pkt = NULL;
-                this->schedule(curTick+1);
-            }
+            DPRINTF(CachePort, "%s still more CSHR requests to send\n",
+                    cachePort->name());
+            //Still more to issue, rerequest in 1 cycle
+            pkt = NULL;
+            this->schedule(curTick+1);
         }
-        return;
     }
-    //Else it's a response
+}
+
+const char *
+BaseCache::RequestEvent::description()
+{
+    return "Cache request event";
+}
+
+BaseCache::ResponseEvent::ResponseEvent(CachePort *_cachePort)
+    : Event(&mainEventQueue, CPU_Tick_Pri), cachePort(_cachePort)
+{
+    pkt = NULL;
+}
+
+void
+BaseCache::ResponseEvent::process()
+{
     assert(cachePort->transmitList.size());
     assert(cachePort->transmitList.front().first <= curTick);
     pkt = cachePort->transmitList.front().second;
@@ -354,9 +362,9 @@ BaseCache::CacheEvent::process()
 }
 
 const char *
-BaseCache::CacheEvent::description()
+BaseCache::ResponseEvent::description()
 {
-    return "BaseCache timing event";
+    return "Cache response event";
 }
 
 void
diff --git a/src/mem/cache/base_cache.hh b/src/mem/cache/base_cache.hh
index ee871c1c4..0f2baa306 100644
--- a/src/mem/cache/base_cache.hh
+++ b/src/mem/cache/base_cache.hh
@@ -117,13 +117,22 @@ class BaseCache : public MemObject
         std::list<std::pair<Tick,PacketPtr> > transmitList;
     };
 
-    struct CacheEvent : public Event
+    struct RequestEvent : public Event
     {
         CachePort *cachePort;
         PacketPtr pkt;
-        bool newResponse;
 
-        CacheEvent(CachePort *_cachePort, bool response);
+        RequestEvent(CachePort *_cachePort, Tick when);
+        void process();
+        const char *description();
+    };
+
+    struct ResponseEvent : public Event
+    {
+        CachePort *cachePort;
+        PacketPtr pkt;
+
+        ResponseEvent(CachePort *_cachePort);
         void process();
         const char *description();
     };
@@ -132,8 +141,8 @@ class BaseCache : public MemObject
     CachePort *cpuSidePort;
     CachePort *memSidePort;
 
-    CacheEvent *sendEvent;
-    CacheEvent *memSendEvent;
+    ResponseEvent *sendEvent;
+    ResponseEvent *memSendEvent;
 
   private:
     void recvStatusChange(Port::Status status, bool isCpuSide)
@@ -432,9 +441,7 @@ class BaseCache : public MemObject
     {
         if (!doMasterRequest() && !memSidePort->waitingOnRetry)
         {
-            BaseCache::CacheEvent * reqCpu =
-                new BaseCache::CacheEvent(memSidePort, false);
-            reqCpu->schedule(time);
+            new RequestEvent(memSidePort, time);
         }
         uint8_t flag = 1<<cause;
         masterRequests |= flag;
@@ -469,9 +476,7 @@ class BaseCache : public MemObject
     {
         if (!doSlaveRequest() && !cpuSidePort->waitingOnRetry)
         {
-            BaseCache::CacheEvent * reqCpu =
-                new BaseCache::CacheEvent(cpuSidePort, false);
-            reqCpu->schedule(time);
+            new RequestEvent(cpuSidePort, time);
         }
         uint8_t flag = 1<<cause;
         slaveRequests |= flag;
diff --git a/src/mem/cache/cache_impl.hh b/src/mem/cache/cache_impl.hh
index c70f10151..f78909b8f 100644
--- a/src/mem/cache/cache_impl.hh
+++ b/src/mem/cache/cache_impl.hh
@@ -1146,11 +1146,11 @@ template<class TagStore, class Coherence>
 Port *
 Cache<TagStore,Coherence>::getPort(const std::string &if_name, int idx)
 {
-    if (if_name == "")
+    if (if_name == "" || if_name == "cpu_side")
     {
         if (cpuSidePort == NULL) {
             cpuSidePort = new CpuSidePort(name() + "-cpu_side_port", this);
-            sendEvent = new CacheEvent(cpuSidePort, true);
+            sendEvent = new ResponseEvent(cpuSidePort);
         }
         return cpuSidePort;
     }
@@ -1158,20 +1158,12 @@ Cache<TagStore,Coherence>::getPort(const std::string &if_name, int idx)
     {
         return new CpuSidePort(name() + "-cpu_side_funcport", this);
     }
-    else if (if_name == "cpu_side")
-    {
-        if (cpuSidePort == NULL) {
-            cpuSidePort = new CpuSidePort(name() + "-cpu_side_port", this);
-            sendEvent = new CacheEvent(cpuSidePort, true);
-        }
-        return cpuSidePort;
-    }
     else if (if_name == "mem_side")
     {
         if (memSidePort != NULL)
             panic("Already have a mem side for this cache\n");
         memSidePort = new MemSidePort(name() + "-mem_side_port", this);
-        memSendEvent = new CacheEvent(memSidePort, true);
+        memSendEvent = new ResponseEvent(memSidePort);
         return memSidePort;
     }
     else panic("Port name %s unrecognized\n", if_name);