weighted_lru_rp.hh

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/*
 * Copyright (c) 2013-2015 Advanced Micro Devices, Inc.
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#ifndef __MEM_CACHE_REPLACEMENT_POLICIES_WEIGHTED_LRU_RP_HH__
#define __MEM_CACHE_REPLACEMENT_POLICIES_WEIGHTED_LRU_RP_HH__
 
#include <memory>
 
#include "base/types.hh"
#include "mem/cache/replacement_policies/base.hh"
 
struct WeightedLRURPParams;
 
namespace ReplacementPolicy {
 
class WeightedLRU : public Base
{
  protected:
    struct WeightedLRUReplData : ReplacementData
    {
        int last_occ_ptr;
 
        Tick last_touch_tick;
 
        WeightedLRUReplData() : ReplacementData(),
                                last_occ_ptr(0), last_touch_tick(0) {}
    };
  public:
    typedef WeightedLRURPParams Params;
    WeightedLRU(const Params &p);
    ~WeightedLRU() = default;
 
    void invalidate(const std::shared_ptr<ReplacementData>& replacement_data)
                                                              const override;
    void touch(const std::shared_ptr<ReplacementData>&
                                        replacement_data) const override;
    void touch(const std::shared_ptr<ReplacementData>& replacement_data,
                                        int occupancy) const;
 
    void reset(const std::shared_ptr<ReplacementData>& replacement_data) const
                                                                     override;
 
    std::shared_ptr<ReplacementData> instantiateEntry() override;
 
    ReplaceableEntry* getVictim(const ReplacementCandidates&
                                              candidates) const override;
};
 
} // namespace ReplacementPolicy
 
#endif // __MEM_CACHE_REPLACEMENT_POLICIES_WEIGHTED_LRU_RP_HH__