extension_adaptors.h

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#ifndef __EXTENSIONS_ADAPTORS_H__
#define __EXTENSIONS_ADAPTORS_H__

#include "tlm.h"
#include "my_extension.h"

#include "tlm_utils/simple_initiator_socket.h"
#include "tlm_utils/simple_target_socket.h"

template <unsigned int BUSWIDTH = 32>
class adapt_ext2gp : public sc_core::sc_module
{
    public:
    typedef tlm::tlm_generic_payload                   initiator_payload_type;
    typedef tlm::tlm_generic_payload                   target_payload_type;
    typedef tlm_utils::simple_initiator_socket<adapt_ext2gp, BUSWIDTH,
                                  tlm::tlm_base_protocol_types> initiator_socket_type;
    typedef tlm_utils::simple_target_socket<adapt_ext2gp, BUSWIDTH,
                               my_extended_payload_types>  target_socket_type;
    
    target_socket_type  target_socket;
    initiator_socket_type initiator_socket;

    SC_HAS_PROCESS(adapt_ext2gp);
    adapt_ext2gp(sc_core::sc_module_name name_)
        : sc_core::sc_module(name_)
    {
      target_socket.register_nb_transport_fw(this, &adapt_ext2gp::forward_nb_transport);
      target_socket.register_transport_dbg(this, &adapt_ext2gp::transport_debug);
      target_socket.register_get_direct_mem_ptr(this, &adapt_ext2gp::get_dmi_pointer);
        
      initiator_socket.register_nb_transport_bw(this, &adapt_ext2gp::backward_nb_transport);
      initiator_socket.register_invalidate_direct_mem_ptr(this, &adapt_ext2gp::invalidate_dmi_pointers);
    }

    // NB transport

    // Forward direction: The initiator calls this method with an extended
    // payload. We leave the extension class in the vector, and it will be
    // ignored by the GP target.
    tlm::tlm_sync_enum forward_nb_transport(initiator_payload_type& trans,
                                            tlm::tlm_phase& phase,
                                            sc_core::sc_time& t)
    {
        return initiator_socket->nb_transport_fw(trans, phase, t);
    }
    // Backward direction: we can  assume here that the payload we get
    // as parameter is the same one that the initiator sent out. Thus, the
    // extension vector is known to be present.
    tlm::tlm_sync_enum backward_nb_transport(target_payload_type& trans,
                                             tlm::tlm_phase& phase,
                                             sc_core::sc_time& t)
    {
        return target_socket->nb_transport_bw(trans, phase, t);
    }
    
    bool get_dmi_pointer(target_payload_type& trans,
                         tlm::tlm_dmi& dmi_data)
    {
        bool tmp_ret = initiator_socket->get_direct_mem_ptr(trans,
                                                            dmi_data);
        return tmp_ret;
    }

    // simple call forwarders:
    unsigned int transport_debug(target_payload_type& trans)
    {
        return initiator_socket->transport_dbg(trans);
    }
    void invalidate_dmi_pointers(sc_dt::uint64 start_range,
                                 sc_dt::uint64 end_range)
    {
        target_socket->invalidate_direct_mem_ptr(start_range,
                                                 end_range);
    }
};

template <unsigned int BUSWIDTH = 32>
class adapt_gp2ext : public sc_core::sc_module
{
    public:
    typedef tlm::tlm_generic_payload                   initiator_payload_type;
    typedef tlm::tlm_generic_payload                   target_payload_type;
    typedef tlm_utils::simple_initiator_socket<adapt_gp2ext, BUSWIDTH,
                                  my_extended_payload_types> initiator_socket_type;
    typedef tlm_utils::simple_target_socket<adapt_gp2ext, BUSWIDTH,
                               tlm::tlm_base_protocol_types> target_socket_type;
    
    target_socket_type  target_socket;
    initiator_socket_type initiator_socket;

    SC_HAS_PROCESS(adapt_gp2ext);
    adapt_gp2ext(sc_core::sc_module_name name_)
        : sc_core::sc_module(name_)
    {
        // Optionally, we can initialize our private extension class
        // here, if required.

      target_socket.register_nb_transport_fw(this, &adapt_gp2ext::forward_nb_transport);
      target_socket.register_transport_dbg(this, &adapt_gp2ext::transport_debug);
      target_socket.register_get_direct_mem_ptr(this, &adapt_gp2ext::get_dmi_pointer);
        
      initiator_socket.register_nb_transport_bw(this, &adapt_gp2ext::backward_nb_transport);
      initiator_socket.register_invalidate_direct_mem_ptr(this, &adapt_gp2ext::invalidate_dmi_pointers);

        m_ext.m_data = 13;
    }

    // NB transport

    // Forward direction: We extend the payload on the fly (if needed).
    tlm::tlm_sync_enum forward_nb_transport(initiator_payload_type& trans,
                                            tlm::tlm_phase& phase,
                                            sc_core::sc_time& t)
    {
        // If the mandatory extension is not there, we need to add it and
        // store it so that we can re-construc the original state.
        // Otherwise we don't touch the extension, so that we don't overwrite
        // it in e.g. a nonGP->GP->nonGP (initiator->interconnect->target)
        // setup.
        // Note, however, that there might be situations where we might need to
        // re-initialize the extension, e.g. for mutable data fields in
        // different system setups.
        trans.get_extension(m_initiator_ext);
        if (!m_initiator_ext)
        {
            m_initiator_ext = trans.set_extension(&m_ext);
        }
        tlm::tlm_sync_enum tmp =
        initiator_socket->nb_transport_fw(trans, phase, t);
        if (tmp == tlm::TLM_COMPLETED)
        {
            m_initiator_ext = trans.set_extension(m_initiator_ext);            
        }
        return tmp;
    }
    // Backward direction: only restore of original extension and static_cast.
    tlm::tlm_sync_enum backward_nb_transport(target_payload_type& trans,
                                             tlm::tlm_phase& phase,
                                             sc_core::sc_time& t)
    {
        m_initiator_ext = trans.set_extension(m_initiator_ext);
        return target_socket->nb_transport_bw(trans, phase, t);
    }

    bool get_dmi_pointer(target_payload_type& trans,
                         tlm::tlm_dmi& dmi_data)
    {
        // If the mandatory extension is not there, we need to add it and
        // store it so that we can re-construc the original state.
        // Otherwise we don't touch the extension, so that we don't overwrite
        // it in e.g. a nonGP->GP->nonGP (initiator->interconnect->target)
        // setup.
        my_extension* tmp_ext;
        trans.get_extension(tmp_ext);
        if (!tmp_ext)
        {
            trans.set_extension(&m_ext);
        }
        bool tmp_ret = initiator_socket->get_direct_mem_ptr(trans,
                                                            dmi_data);
        if(!tmp_ext)
        {
            trans.clear_extension(tmp_ext);
        }
        return tmp_ret;
    }
    // simple call forwarders:
    unsigned int transport_debug(target_payload_type& trans)
    {
        return initiator_socket->transport_dbg(trans);
    }
    void invalidate_dmi_pointers(sc_dt::uint64 start_range,
                                 sc_dt::uint64 end_range)
    {
        target_socket->invalidate_direct_mem_ptr(start_range,
                                                 end_range);
    }

private:
    my_extension  m_ext;
    my_extension* m_initiator_ext;
};

#endif