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;

class BRRIPRP : public BaseReplacementPolicy
{
  protected:
    struct BRRIPReplData : ReplacementData
    {
        SatCounter 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;

    BRRIPRP(const Params *p);

    ~BRRIPRP() {}

    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;
};

#endif // __MEM_CACHE_REPLACEMENT_POLICIES_BRRIP_RP_HH__