addr_mapper.hh

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 * to a hardware implementation of the functionality of the software
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#ifndef __MEM_ADDR_MAPPER_HH__
#define __MEM_ADDR_MAPPER_HH__
 
#include "mem/port.hh"
#include "params/AddrMapper.hh"
#include "params/RangeAddrMapper.hh"
#include "sim/sim_object.hh"
 
namespace gem5
{
 
class AddrMapper : public SimObject
{
  public:
    AddrMapper(const AddrMapperParams &params);
 
    virtual ~AddrMapper() = default;
 
    Port &getPort(const std::string &if_name,
                  PortID idx=InvalidPortID) override;
 
    void init() override;
 
  protected:
    virtual Addr remapAddr(Addr addr) const = 0;
 
    class AddrMapperSenderState : public Packet::SenderState
    {
 
      public:
 
        AddrMapperSenderState(Addr _origAddr) : origAddr(_origAddr)
        {}
 
        ~AddrMapperSenderState() {}
 
        Addr origAddr;
    };
 
    class MapperRequestPort : public RequestPort
    {
      public:
        MapperRequestPort(const std::string& _name, AddrMapper& _mapper)
            : RequestPort(_name), mapper(_mapper)
        { }
 
      protected:
        void
        recvFunctionalSnoop(PacketPtr pkt) override
        {
            mapper.recvFunctionalSnoop(pkt);
        }
 
        Tick
        recvAtomicSnoop(PacketPtr pkt) override
        {
            return mapper.recvAtomicSnoop(pkt);
        }
 
        bool
        recvTimingResp(PacketPtr pkt) override
        {
            return mapper.recvTimingResp(pkt);
        }
 
        void
        recvTimingSnoopReq(PacketPtr pkt) override
        {
            mapper.recvTimingSnoopReq(pkt);
        }
 
        void
        recvRangeChange() override
        {
            mapper.recvRangeChange();
        }
 
        bool
        isSnooping() const override
        {
            return mapper.isSnooping();
        }
 
        void
        recvReqRetry() override
        {
            mapper.recvReqRetry();
        }
 
      private:
        AddrMapper& mapper;
    };
 
    MapperRequestPort memSidePort;
 
    class MapperResponsePort : public ResponsePort
    {
      public:
        MapperResponsePort(const std::string& _name, AddrMapper& _mapper)
            : ResponsePort(_name), mapper(_mapper)
        {}
 
      protected:
        void
        recvFunctional(PacketPtr pkt) override
        {
            mapper.recvFunctional(pkt);
        }
 
        Tick
        recvAtomic(PacketPtr pkt) override
        {
            return mapper.recvAtomic(pkt);
        }
 
        bool
        recvTimingReq(PacketPtr pkt) override
        {
            return mapper.recvTimingReq(pkt);
        }
 
        bool
        recvTimingSnoopResp(PacketPtr pkt) override
        {
            return mapper.recvTimingSnoopResp(pkt);
        }
 
        AddrRangeList
        getAddrRanges() const override
        {
            return mapper.getAddrRanges();
        }
 
        void
        recvRespRetry() override
        {
            mapper.recvRespRetry();
        }
 
      private:
        AddrMapper& mapper;
    };
 
    MapperResponsePort cpuSidePort;
 
    void recvFunctional(PacketPtr pkt);
 
    void recvFunctionalSnoop(PacketPtr pkt);
 
    Tick recvAtomic(PacketPtr pkt);
 
    Tick recvAtomicSnoop(PacketPtr pkt);
 
    bool recvTimingReq(PacketPtr pkt);
 
    bool recvTimingResp(PacketPtr pkt);
 
    void recvTimingSnoopReq(PacketPtr pkt);
 
    bool recvTimingSnoopResp(PacketPtr pkt);
 
    virtual AddrRangeList getAddrRanges() const = 0;
 
    bool isSnooping() const;
 
    void recvReqRetry();
 
    void recvRespRetry();
 
    virtual void recvRangeChange();
};
 
class RangeAddrMapper : public AddrMapper
{
  public:
    RangeAddrMapper(const RangeAddrMapperParams &p);
 
    ~RangeAddrMapper() = default;
 
    AddrRangeList getAddrRanges() const override;
 
    void
    init() override
    {
        AddrMapper::init();
        cpuSidePort.sendRangeChange();
    }
 
  protected:
    std::vector<AddrRange> originalRanges;
 
    std::vector<AddrRange> remappedRanges;
 
    Addr remapAddr(Addr addr) const override;
    void
    recvRangeChange() override
    {
        // TODO Check that our peer is actually expecting to receive accesses
        // in our output range(s).
    }
};
 
} // namespace gem5
 
#endif //__MEM_ADDR_MAPPER_HH__