mem-cache: Create ReplacementPolicy namespace

Encapsulate the replacement policy classes in their own namespace.

As a side effect these classes have been renamed to drop the RP
suffix in the C++ code.

Change-Id: Ibb65dfb584a1413492fcf11833cf91a859cbff4e
Signed-off-by: Daniel R. Carvalho <odanrc@yahoo.com.br>
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/35795
Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com>
Maintainer: Nikos Nikoleris <nikos.nikoleris@arm.com>
Tested-by: kokoro <noreply+kokoro@google.com>

src/mem/cache/prefetch/associative_set.hh

@@ -54,7 +54,7 @@ class AssociativeSet {
     /** Pointer to the indexing policy */
     BaseIndexingPolicy* const indexingPolicy;
     /** Pointer to the replacement policy */
-    BaseReplacementPolicy* const replacementPolicy;
+    ReplacementPolicy::Base* const replacementPolicy;
     /** Vector containing the entries of the container */
     std::vector<Entry> entries;
 
@@ -66,11 +66,10 @@ class AssociativeSet {
      *   of sets can be calculated dividing this balue by the 'assoc' value
      * @param idx_policy indexing policy
      * @param rpl_policy replacement policy
-     * @param initial value of the elements of the set
+     * @param init_val initial value of the elements of the set
      */
     AssociativeSet(int assoc, int num_entries, BaseIndexingPolicy *idx_policy,
-                   BaseReplacementPolicy *rpl_policy, Entry const &init_value =
-                   Entry());
+        ReplacementPolicy::Base *rpl_policy, Entry const &init_val = Entry());
 
     /**
      * Find an entry within the set

src/mem/cache/prefetch/associative_set_impl.hh

@@ -34,7 +34,7 @@
 
 template<class Entry>
 AssociativeSet<Entry>::AssociativeSet(int assoc, int num_entries,
-        BaseIndexingPolicy *idx_policy, BaseReplacementPolicy *rpl_policy,
+        BaseIndexingPolicy *idx_policy, ReplacementPolicy::Base *rpl_policy,
         Entry const &init_value)
   : associativity(assoc), numEntries(num_entries), indexingPolicy(idx_policy),
     replacementPolicy(rpl_policy), entries(numEntries, init_value)

src/mem/cache/prefetch/stride.hh

@@ -61,7 +61,9 @@
 #include "params/StridePrefetcherHashedSetAssociative.hh"
 
 class BaseIndexingPolicy;
-class BaseReplacementPolicy;
+namespace ReplacementPolicy {
+    class Base;
+}
 struct StridePrefetcherParams;
 
 namespace Prefetcher {
@@ -107,11 +109,11 @@ class Stride : public Queued
         const int numEntries;
 
         BaseIndexingPolicy* const indexingPolicy;
-        BaseReplacementPolicy* const replacementPolicy;
+        ReplacementPolicy::Base* const replacementPolicy;
 
         PCTableInfo(int assoc, int num_entries,
             BaseIndexingPolicy* indexing_policy,
-            BaseReplacementPolicy* replacement_policy)
+            ReplacementPolicy::Base* replacement_policy)
           : assoc(assoc), numEntries(num_entries),
             indexingPolicy(indexing_policy),
             replacementPolicy(replacement_policy)