ruby: expose access permission to replacement policies

This patch adds support that allows the replacement policy to identify each
cache block's access permission.  This information can be useful when making
replacement decisions.

1 files changed, 13 insertions, 0 deletions

diff --git a/src/mem/ruby/structures/CacheMemory.cc b/src/mem/ruby/structures/CacheMemory.cc
index d08724cff..e444ae09c 100644
--- a/src/mem/ruby/structures/CacheMemory.cc
+++ b/src/mem/ruby/structures/CacheMemory.cc
@@ -63,6 +63,7 @@ CacheMemory::CacheMemory(const Params *p)
     m_latency = p->latency;
     m_cache_assoc = p->assoc;
     m_replacementPolicy_ptr = p->replacement_policy;
+    m_replacementPolicy_ptr->setCache(this);
     m_start_index_bit = p->start_index_bit;
     m_is_instruction_only_cache = p->is_icache;
     m_resource_stalls = p->resourceStalls;
@@ -592,3 +593,15 @@ CacheMemory::checkResourceAvailable(CacheResourceType res, Address addr)
         return true;
     }
 }
+
+bool
+CacheMemory::isBlockInvalid(int64 cache_set, int64 loc)
+{
+  return (m_cache[cache_set][loc]->m_Permission == AccessPermission_Invalid);
+}
+
+bool
+CacheMemory::isBlockNotBusy(int64 cache_set, int64 loc)
+{
+  return (m_cache[cache_set][loc]->m_Permission != AccessPermission_Busy);
+}