mem: Add explicit Cache subclass and make BaseCache abstract

Open up for other subclasses to BaseCache and transition to using the
explicit Cache subclass.

--HG--
rename : src/mem/cache/BaseCache.py => src/mem/cache/Cache.py

src/mem/cache/Cache.py

@@ -37,6 +37,7 @@
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #
 # Authors: Nathan Binkert
+#          Andreas Hansson
 
 from m5.params import *
 from m5.proxy import *
@@ -46,6 +47,7 @@ from Tags import *
 
 class BaseCache(MemObject):
     type = 'BaseCache'
+    abstract = True
     cxx_header = "mem/cache/base.hh"
 
     size = Param.MemorySize("Capacity")
@@ -81,3 +83,7 @@ class BaseCache(MemObject):
          "Address range for the CPU-side port (to allow striping)")
 
     system = Param.System(Parent.any, "System we belong to")
+
+class Cache(BaseCache):
+    type = 'Cache'
+    cxx_header = 'mem/cache/cache.hh'

src/mem/cache/SConscript

@@ -30,7 +30,7 @@
 
 Import('*')
 
-SimObject('BaseCache.py')
+SimObject('Cache.py')
 
 Source('base.cc')
 Source('cache.cc')

src/mem/cache/base.cc

@@ -65,13 +65,13 @@ BaseCache::CacheSlavePort::CacheSlavePort(const std::string &_name,
 {
 }
 
-BaseCache::BaseCache(const Params *p)
+BaseCache::BaseCache(const BaseCacheParams *p, unsigned blk_size)
     : MemObject(p),
       cpuSidePort(nullptr), memSidePort(nullptr),
       mshrQueue("MSHRs", p->mshrs, 4, p->demand_mshr_reserve, MSHRQueue_MSHRs),
       writeBuffer("write buffer", p->write_buffers, p->mshrs+1000, 0,
                   MSHRQueue_WriteBuffer),
-      blkSize(p->system->cacheLineSize()),
+      blkSize(blk_size),
       lookupLatency(p->hit_latency),
       forwardLatency(p->hit_latency),
       fillLatency(p->response_latency),
@@ -774,11 +774,3 @@ BaseCache::regStats()
         ;
 
 }
-
-BaseCache *
-BaseCacheParams::create()
-{
-    assert(tags);
-
-    return new Cache(this);
-}

src/mem/cache/base.hh

@@ -473,8 +473,7 @@ class BaseCache : public MemObject
     virtual void regStats();
 
   public:
-    typedef BaseCacheParams Params;
-    BaseCache(const Params *p);
+    BaseCache(const BaseCacheParams *p, unsigned blk_size);
     ~BaseCache() {}
 
     virtual void init();

src/mem/cache/cache.cc

@@ -63,8 +63,8 @@
 #include "mem/cache/prefetch/base.hh"
 #include "sim/sim_exit.hh"
 
-Cache::Cache(const Params *p)
-    : BaseCache(p),
+Cache::Cache(const CacheParams *p)
+    : BaseCache(p, p->system->cacheLineSize()),
       tags(p->tags),
       prefetcher(p->prefetcher),
       doFastWrites(true),
@@ -2382,6 +2382,13 @@ CpuSidePort::CpuSidePort(const std::string &_name, Cache *_cache,
 {
 }
 
+Cache*
+CacheParams::create()
+{
+    assert(tags);
+
+    return new Cache(this);
+}
 ///////////////
 //
 // MemSidePort

src/mem/cache/cache.hh

@@ -57,6 +57,7 @@
 #include "mem/cache/blk.hh"
 #include "mem/cache/mshr.hh"
 #include "mem/cache/tags/base.hh"
+#include "params/Cache.hh"
 #include "sim/eventq.hh"
 
 //Forward decleration
@@ -419,7 +420,7 @@ class Cache : public BaseCache
 
   public:
     /** Instantiates a basic cache object. */
-    Cache(const Params *p);
+    Cache(const CacheParams *p);
 
     /** Non-default destructor is needed to deallocate memory. */
     virtual ~Cache();