1 files changed, 62 insertions, 0 deletions
diff --git a/src/mem/ruby/system/AbstractReplacementPolicy.hh b/src/mem/ruby/system/AbstractReplacementPolicy.hh
new file mode 100644
index 000000000..497226fad
--- /dev/null
+++ b/src/mem/ruby/system/AbstractReplacementPolicy.hh
@@ -0,0 +1,62 @@
+
+#ifndef ABSTRACTREPLACEMENTPOLICY_H
+#define ABSTRACTREPLACEMENTPOLICY_H
+
+#include "Global.hh"
+
+class AbstractReplacementPolicy {
+
+public:
+
+  AbstractReplacementPolicy(Index num_sets, Index assoc);
+  virtual ~AbstractReplacementPolicy();
+
+  /* touch a block. a.k.a. update timestamp */
+  virtual void touch(Index set, Index way, Time time) = 0;
+
+  /* returns the way to replace */
+  virtual Index getVictim(Index set) const = 0;
+
+  /* get the time of the last access */
+  Time getLastAccess(Index set, Index way);
+
+ protected:
+  unsigned int m_num_sets;       /** total number of sets */
+  unsigned int m_assoc;          /** set associativity */
+  Time **m_last_ref_ptr;         /** timestamp of last reference */
+};
+
+inline
+AbstractReplacementPolicy::AbstractReplacementPolicy(Index num_sets, Index assoc)
+{
+  m_num_sets = num_sets;
+  m_assoc = assoc;
+  m_last_ref_ptr = new Time*[m_num_sets];
+  for(unsigned int i = 0; i < m_num_sets; i++){
+    m_last_ref_ptr[i] = new Time[m_assoc];
+    for(unsigned int j = 0; j < m_assoc; j++){
+      m_last_ref_ptr[i][j] = 0;
+    }
+  }
+}
+
+inline
+AbstractReplacementPolicy::~AbstractReplacementPolicy()
+{
+  if(m_last_ref_ptr != NULL){
+    for(unsigned int i = 0; i < m_num_sets; i++){
+      if(m_last_ref_ptr[i] != NULL){
+        delete[] m_last_ref_ptr[i];
+      }
+    }
+    delete[] m_last_ref_ptr;
+  }
+}
+
+inline
+Time AbstractReplacementPolicy::getLastAccess(Index set, Index way)
+{
+  return m_last_ref_ptr[set][way];
+}
+
+#endif // ABSTRACTREPLACEMENTPOLICY_H