brrip_rp.hh

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#ifndef __MEM_CACHE_REPLACEMENT_POLICIES_BRRIP_RP_HH__
#define __MEM_CACHE_REPLACEMENT_POLICIES_BRRIP_RP_HH__
 
#include "base/sat_counter.hh"
#include "mem/cache/replacement_policies/base.hh"
 
struct BRRIPRPParams;
 
namespace ReplacementPolicy {
 
class BRRIP : public Base
{
  protected:
    struct BRRIPReplData : ReplacementData
    {
        SatCounter8 rrpv;
 
        bool valid;
 
        BRRIPReplData(const int num_bits)
            : rrpv(num_bits), valid(false)
        {
        }
    };
 
    const unsigned numRRPVBits;
 
    const bool hitPriority;
 
    const unsigned btp;
 
  public:
    typedef BRRIPRPParams Params;
    BRRIP(const Params &p);
    ~BRRIP() = default;
 
    void invalidate(const std::shared_ptr<ReplacementData>& replacement_data)
                                                              const override;
 
    void touch(const std::shared_ptr<ReplacementData>& replacement_data) const
                                                                     override;
 
    void reset(const std::shared_ptr<ReplacementData>& replacement_data) const
                                                                     override;
 
    ReplaceableEntry* getVictim(const ReplacementCandidates& candidates) const
                                                                     override;
 
    std::shared_ptr<ReplacementData> instantiateEntry() override;
};
 
} // namespace ReplacementPolicy
 
#endif // __MEM_CACHE_REPLACEMENT_POLICIES_BRRIP_RP_HH__