MEM: Remove the otherPort from the cache ports

This patch is a very straight-forward simplification, removing the
unecessary otherPort pointer from the cache port. The pointer was only
used to forward range changes, and the address range is fixed for the
cache. Removing the pointer simplifies the transition to master/slave
ports.

src/mem/cache/base.cc

@@ -44,8 +44,7 @@ using namespace std;
 BaseCache::CachePort::CachePort(const std::string &_name, BaseCache *_cache,
                                 const std::string &_label)
     : SimpleTimingPort(_name, _cache), cache(_cache),
-      label(_label), otherPort(NULL),
+      label(_label), blocked(false), mustSendRetry(false)
-      blocked(false), mustSendRetry(false)
 {
 }
 
@@ -69,12 +68,6 @@ BaseCache::BaseCache(const Params *p)
 {
 }
 
-void
-BaseCache::CachePort::recvRangeChange() const
-{
-    otherPort->sendRangeChange();
-}
-
 
 bool
 BaseCache::CachePort::checkFunctional(PacketPtr pkt)

src/mem/cache/base.hh

@@ -105,8 +105,6 @@ class BaseCache : public MemObject
         CachePort(const std::string &_name, BaseCache *_cache,
                   const std::string &_label);
 
-        virtual void recvRangeChange() const;
-
         virtual unsigned deviceBlockSize() const;
 
         bool recvRetryCommon();
@@ -117,16 +115,12 @@ class BaseCache : public MemObject
         const std::string label;
 
       public:
-        void setOtherPort(CachePort *_otherPort) { otherPort = _otherPort; }
-
         void setBlocked();
 
         void clearBlocked();
 
         bool checkFunctional(PacketPtr pkt);
 
-        CachePort *otherPort;
-
         bool blocked;
 
         bool mustSendRetry;

src/mem/cache/cache_impl.hh

@@ -77,8 +77,6 @@ Cache<TagStore>::Cache(const Params *p, TagStore *tags, BasePrefetcher *pf)
                                   "CpuSidePort");
     memSidePort = new MemSidePort(p->name + "-mem_side_port", this,
                                   "MemSidePort");
-    cpuSidePort->setOtherPort(memSidePort);
-    memSidePort->setOtherPort(cpuSidePort);
 
     tags->setCache(this);
     if (prefetcher)