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#ifndef ABSTRACTREPLACEMENTPOLICY_H
#define ABSTRACTREPLACEMENTPOLICY_H
#include "mem/ruby/common/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
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