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#ifndef LRUPOLICY_H
#define LRUPOLICY_H
#include "mem/ruby/system/AbstractReplacementPolicy.hh"
/* Simple true LRU replacement policy */
class LRUPolicy : public AbstractReplacementPolicy {
public:
LRUPolicy(Index num_sets, Index assoc);
~LRUPolicy();
void touch(Index set, Index way, Time time);
Index getVictim(Index set) const;
};
inline
LRUPolicy::LRUPolicy(Index num_sets, Index assoc)
: AbstractReplacementPolicy(num_sets, assoc)
{
}
inline
LRUPolicy::~LRUPolicy()
{
}
inline
void LRUPolicy::touch(Index set, Index index, Time time){
assert(index >= 0 && index < m_assoc);
assert(set >= 0 && set < m_num_sets);
m_last_ref_ptr[set][index] = time;
}
inline
Index LRUPolicy::getVictim(Index set) const {
// assert(m_assoc != 0);
Time time, smallest_time;
Index smallest_index;
smallest_index = 0;
smallest_time = m_last_ref_ptr[set][0];
for (unsigned int i=0; i < m_assoc; i++) {
time = m_last_ref_ptr[set][i];
//assert(m_cache[cacheSet][i].m_Permission != AccessPermission_NotPresent);
if (time < smallest_time){
smallest_index = i;
smallest_time = time;
}
}
// DEBUG_EXPR(CACHE_COMP, MedPrio, cacheSet);
// DEBUG_EXPR(CACHE_COMP, MedPrio, smallest_index);
// DEBUG_EXPR(CACHE_COMP, MedPrio, m_cache[cacheSet][smallest_index]);
// DEBUG_EXPR(CACHE_COMP, MedPrio, *this);
return smallest_index;
}
#endif // PSEUDOLRUBITS_H
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