2009-05-11 19:38:43 +02:00
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#ifndef ABSTRACTREPLACEMENTPOLICY_H
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#define ABSTRACTREPLACEMENTPOLICY_H
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2009-05-11 19:38:45 +02:00
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#include "mem/ruby/common/Global.hh"
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2009-05-11 19:38:43 +02:00
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class AbstractReplacementPolicy {
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public:
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AbstractReplacementPolicy(Index num_sets, Index assoc);
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virtual ~AbstractReplacementPolicy();
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/* touch a block. a.k.a. update timestamp */
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virtual void touch(Index set, Index way, Time time) = 0;
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/* returns the way to replace */
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virtual Index getVictim(Index set) const = 0;
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/* get the time of the last access */
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Time getLastAccess(Index set, Index way);
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protected:
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unsigned int m_num_sets; /** total number of sets */
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unsigned int m_assoc; /** set associativity */
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Time **m_last_ref_ptr; /** timestamp of last reference */
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};
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inline
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AbstractReplacementPolicy::AbstractReplacementPolicy(Index num_sets, Index assoc)
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{
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m_num_sets = num_sets;
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m_assoc = assoc;
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m_last_ref_ptr = new Time*[m_num_sets];
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for(unsigned int i = 0; i < m_num_sets; i++){
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m_last_ref_ptr[i] = new Time[m_assoc];
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for(unsigned int j = 0; j < m_assoc; j++){
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m_last_ref_ptr[i][j] = 0;
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}
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}
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}
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inline
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AbstractReplacementPolicy::~AbstractReplacementPolicy()
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{
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if(m_last_ref_ptr != NULL){
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for(unsigned int i = 0; i < m_num_sets; i++){
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if(m_last_ref_ptr[i] != NULL){
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delete[] m_last_ref_ptr[i];
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}
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}
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delete[] m_last_ref_ptr;
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}
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}
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inline
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Time AbstractReplacementPolicy::getLastAccess(Index set, Index way)
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{
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return m_last_ref_ptr[set][way];
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}
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#endif // ABSTRACTREPLACEMENTPOLICY_H
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