external_master.hh

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 * Copyright (c) 2012-2014 ARM Limited
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 * property including but not limited to intellectual property relating
 * to a hardware implementation of the functionality of the software
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#ifndef __MEM_EXTERNAL_MASTER_HH__
#define __MEM_EXTERNAL_MASTER_HH__
 
#include "mem/port.hh"
#include "params/ExternalMaster.hh"
#include "sim/sim_object.hh"
 
namespace gem5
{
 
class ExternalMaster : public SimObject
{
  public:
    class ExternalPort : public RequestPort
    {
      protected:
        ExternalMaster &owner;
 
      public:
        ExternalPort(const std::string &name_,
            ExternalMaster &owner_) :
            RequestPort(name_, &owner_), owner(owner_)
        { }
 
        ~ExternalPort() { }
 
    };
 
    /* Handlers are specific to *types* of port not specific port
     * instantiations.  A handler will typically build a bridge to the
     * external port from gem5 and provide gem5 with a RequestPort that can be
     * bound to for each call to Handler::getExternalPort.*/
    class Handler
    {
      public:
        virtual ExternalPort *getExternalPort(
            const std::string &name, ExternalMaster &owner,
            const std::string &port_data) = 0;
    };
 
  protected:
    ExternalPort *externalPort;
 
    std::string portName;
 
    std::string portType;
 
    std::string portData;
 
    static std::map<std::string, Handler *> portHandlers;
 
  public:
    ExternalMaster(const ExternalMasterParams &params);
 
    Port &getPort(const std::string &if_name,
                  PortID idx=InvalidPortID) override;
 
    static void registerHandler(const std::string &handler_name,
        Handler *handler);
 
    void init() override;
 
    const RequestorID id;
};
 
} // namespace gem5
 
#endif //__MEM_EXTERNAL_MASTER_HH__