xref: /gem5/src/systemc/ext/tlm_core/2/sockets/target_socket.hh

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#ifndef __SYSTEMC_EXT_TLM_CORE_2_SOCKETS_TARGET_SOCKET_HH__
#define __SYSTEMC_EXT_TLM_CORE_2_SOCKETS_TARGET_SOCKET_HH__

#include <typeindex>

#include "../interfaces/fw_bw_ifs.hh"
#include "base_socket_if.hh"

namespace tlm
{

template <unsigned int BUSWIDTH=32, typename FW_IF=tlm_fw_transport_if<>,
          typename BW_IF=tlm_bw_transport_if<>>
class tlm_base_target_socket_b
{
  public:
    virtual ~tlm_base_target_socket_b() {}

    virtual sc_core::sc_port_b<BW_IF> &get_base_port() = 0;
    virtual sc_core::sc_export<FW_IF> &get_base_export() = 0;
    virtual FW_IF &get_base_interface() = 0;
};

template <unsigned int BUSWIDTH, typename FW_IF, typename BW_IF>
class tlm_base_initiator_socket_b;

template <unsigned int BUSWIDTH, typename FW_IF, typename BW_IF, int N,
          sc_core::sc_port_policy POL>
class tlm_base_initiator_socket;

template <unsigned int BUSWIDTH=32, typename FW_IF=tlm_fw_transport_if<>,
          typename BW_IF=tlm_bw_transport_if<>, int N=1,
          sc_core::sc_port_policy POL=sc_core::SC_ONE_OR_MORE_BOUND>
class tlm_base_target_socket :
    public tlm_base_socket_if,
    public tlm_base_target_socket_b<BUSWIDTH, FW_IF, BW_IF>,
    public sc_core::sc_export<FW_IF>
{
  public:
    typedef FW_IF fw_interface_type;
    typedef BW_IF bw_interface_type;
    typedef sc_core::sc_port<bw_interface_type, N, POL> port_type;

    typedef sc_core::sc_export<fw_interface_type> export_type;
    typedef tlm_base_initiator_socket_b<
        BUSWIDTH, fw_interface_type, bw_interface_type>
        base_initiator_socket_type;

    typedef tlm_base_target_socket_b<
        BUSWIDTH, fw_interface_type, bw_interface_type> base_type;

    template <unsigned int, typename, typename, int, sc_core::sc_port_policy>
    friend class tlm_base_initiator_socket;

  public:
    tlm_base_target_socket() :
        export_type(sc_core::sc_gen_unique_name("tlm_base_target_socket")),
        m_port(sc_core::sc_gen_unique_name("tlm_base_target_socket_port"))
    {}

    explicit tlm_base_target_socket(const char *name) :
        export_type(name), m_port(sc_core::sc_gen_unique_name(
                    (std::string(name) + "_port").c_str()))
    {}

    virtual const char *kind() const { return "tlm_base_target_socket"; }

    //
    // Bind target socket to initiator socket
    // - Binds the port of the initiator socket to the export of the target
    //   socket
    // - Binds the port of the target socket to the export of the initiator
    //   socket
    //
    virtual void
    bind(base_initiator_socket_type &s)
    {
        // initiator.port -> target.export
        (s.get_base_port())(get_base_interface());
        // target.port -> initiator.export
        get_base_port()(s.get_base_interface());
    }

    void operator () (base_initiator_socket_type &s) { bind(s); }

    //
    // Bind target socket to target socket (hierarchical bind)
    // - Binds both the export and the port
    //
    virtual void
    bind(base_type &s)
    {
        // export
        (get_base_export())(s.get_base_export());
        // port
        (s.get_base_port())(get_base_port());
    }

    void operator () (base_type &s) { bind(s); }

    //
    // Bind interface to socket
    // - Binds the interface to the export
    //
    virtual void
    bind(fw_interface_type &ifs)
    {
        export_type *exp = &get_base_export();
        if (this == exp) {
            export_type::bind(ifs);
        } else {
            exp->bind( ifs );
        }
    }

    void operator () (fw_interface_type &s) { bind(s); }

    //
    // Forward to 'size()' of port class.
    //
    int size() const { return m_port.size(); }

    //
    // Forward to 'operator->()' of port class.
    //
    bw_interface_type *operator->() { return m_port.operator->(); }

    //
    // Forward to 'operator[]()' of port class.
    //
    bw_interface_type *operator[](int i) { return m_port.operator[](i); }

    // Implementation of tlm_base_socket_if functions.
    virtual sc_core::sc_port_base &get_port_base() { return m_port; }
    virtual sc_core::sc_port_base const &
    get_port_base() const
    {
        return m_port;
    }
    virtual sc_core::sc_export_base &get_export_base() { return *this; }
    virtual sc_core::sc_export_base const &
    get_export_base() const
    {
        return *this;
    }
    virtual unsigned int get_bus_width() const { return BUSWIDTH; }
    virtual tlm_socket_category
    get_socket_category() const
    {
        return TLM_TARGET_SOCKET;
    }

    // Implementation of tlm_base_target_socket_b functions
    virtual sc_core::sc_port_b<BW_IF> &get_base_port() { return m_port; }
    virtual sc_core::sc_port_b<BW_IF> const &
    get_base_port() const
    {
        return m_port;
    }

    virtual FW_IF &get_base_interface() { return *this; }
    virtual FW_IF const &get_base_interface() const { return *this; }

    virtual sc_core::sc_export<FW_IF> &get_base_export() { return *this; }
    virtual sc_core::sc_export<FW_IF> const &
    get_base_export() const
    {
        return *this;
    }

  protected:
    port_type m_port;
};

template <unsigned int BUSWIDTH=32, typename TYPES=tlm_base_protocol_types,
          int N=1, sc_core::sc_port_policy POL=sc_core::SC_ONE_OR_MORE_BOUND>
class tlm_target_socket :
    public tlm_base_target_socket<
        BUSWIDTH, tlm_fw_transport_if<TYPES>,
        tlm_bw_transport_if<TYPES>, N, POL>
{
  public:
    tlm_target_socket() :
        tlm_base_target_socket<
            BUSWIDTH, tlm_fw_transport_if<TYPES>,
            tlm_bw_transport_if<TYPES>, N, POL>()
    {}

    explicit tlm_target_socket(const char *name) :
        tlm_base_target_socket<
            BUSWIDTH, tlm_fw_transport_if<TYPES>,
            tlm_bw_transport_if<TYPES>, N, POL>(name)
    {}

    virtual const char* kind() const { return "tlm_target_socket"; }

    virtual std::type_index
    get_protocol_types() const
    {
        return typeid(TYPES);
    }
};

} // namespace tlm

#endif /* __SYSTEMC_EXT_TLM_CORE_2_SOCKETS_TARGET_SOCKET_HH__ */