inorder: cache packet handling

-use a pointer to CacheReqPacket instead of PacketPtr so correct destructors
get called on packet deletion
- make sure to delete the packet if the cache blocks the sendTiming request
or for some reason we dont use the packet
- dont overwrite memory requests since in the worst case an instruction will
be replaying a request so no need to keep allocating a new request
- we dont use retryPkt so delete it
- fetch code was split out already, so just assert that this is a memory
reference inst. and that the staticInst is available

1 files changed, 3 insertions, 1 deletions

diff --git a/src/cpu/inorder/resources/fetch_unit.cc b/src/cpu/inorder/resources/fetch_unit.cc
index a0d830ecf..d6038415e 100644
--- a/src/cpu/inorder/resources/fetch_unit.cc
+++ b/src/cpu/inorder/resources/fetch_unit.cc
@@ -170,10 +170,12 @@ FetchUnit::setupMemRequest(DynInstPtr inst, CacheReqPtr cache_req,
     ThreadID tid = inst->readTid();
     Addr aligned_addr = cacheBlockAlign(inst->getMemAddr());
 
-    inst->fetchMemReq =
+    if (inst->fetchMemReq == NULL)
+        inst->fetchMemReq =
             new Request(tid, aligned_addr, acc_size, flags,
                         inst->instAddr(), cpu->readCpuId(), tid);
 
+
     cache_req->memReq = inst->fetchMemReq;
 }