simpleltinitiator1.h

SystemC Transaction Level Modelling. 是基于SystemC之上的总线互联协议

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  The following code is derived, directly or indirectly, from the SystemC
  source code Copyright (c) 1996-2008 by all Contributors.
  All Rights reserved.

  The contents of this file are subject to the restrictions and limitations
  set forth in the SystemC Open Source License Version 3.0 (the "License");
  You may not use this file except in compliance with such restrictions and
  limitations. You may obtain instructions on how to receive a copy of the
  License at http://www.systemc.org/. Software distributed by Contributors
  under the License is distributed on an "AS IS" basis, WITHOUT WARRANTY OF
  ANY KIND, either express or implied. See the License for the specific
  language governing rights and limitations under the License.

 *****************************************************************************/

#ifndef __SIMPLE_LT_INITIATOR1_H__
#define __SIMPLE_LT_INITIATOR1_H__

#include "tlm.h"     /// TLM definitions
#include <cassert>   /// STD assert ()

class SimpleLTInitiator1 :
  public sc_core::sc_module,
  public virtual tlm::tlm_bw_transport_if<>
{
public:
  typedef tlm::tlm_generic_payload        transaction_type;
  typedef tlm::tlm_phase                  phase_type;
  typedef tlm::tlm_sync_enum              sync_enum_type;
  typedef tlm::tlm_fw_transport_if<>      fw_interface_type;
  typedef tlm::tlm_bw_transport_if<>      bw_interface_type;
  typedef tlm::tlm_initiator_socket<32>   initiator_socket_type;

public:
  initiator_socket_type socket;

public:
  SC_HAS_PROCESS(SimpleLTInitiator1);
  SimpleLTInitiator1(sc_core::sc_module_name name,
                  unsigned int nrOfTransactions = 0x5,
                  unsigned int baseAddress = 0x0) :
    sc_core::sc_module(name),
    socket("socket"),
    mNrOfTransactions(nrOfTransactions),
    mBaseAddress(baseAddress),
    mTransactionCount(0)
  {
    // Bind this initiator's interface to the initiator socket
    socket(*this);

    // Initiator thread
    SC_THREAD(run);
  }

  bool initTransaction(transaction_type& trans)
  {
    if (mTransactionCount < mNrOfTransactions) {
      trans.set_address(mBaseAddress + 4*mTransactionCount);
      mData = mTransactionCount;
      trans.set_command(tlm::TLM_WRITE_COMMAND);

    } else if (mTransactionCount < 2 * mNrOfTransactions) {
      trans.set_address(mBaseAddress + 4*(mTransactionCount - mNrOfTransactions));
      mData = 0;
      trans.set_command(tlm::TLM_READ_COMMAND);

    } else {
      return false;
    }

    trans.set_data_ptr(reinterpret_cast<unsigned char*>(&mData));
    trans.set_data_length(4);

    ++mTransactionCount;
    return true;
  }

  void logStartTransation(transaction_type& trans)
  {
    if (trans.get_command() == tlm::TLM_WRITE_COMMAND) {
      std::cout << name() << ": Send write request: A = 0x"
                << std::hex << (unsigned int)trans.get_address()
                << ", D = 0x" << mData << std::dec
                << " @ " << sc_core::sc_time_stamp() << std::endl;

    } else {
      std::cout << name() << ": Send read request: A = 0x"
                << std::hex << (unsigned int)trans.get_address() << std::dec
                << " @ " << sc_core::sc_time_stamp() << std::endl;
    }
  }

  void logEndTransaction(transaction_type& trans)
  {
    if (trans.get_response_status() != tlm::TLM_OK_RESPONSE) {
      std::cout << name() << ": Received error response @ "
                << sc_core::sc_time_stamp() << std::endl;

    } else {
      std::cout << name() <<  ": Received ok response";
      if (trans.get_command() == tlm::TLM_READ_COMMAND) {
        std::cout << ": D = 0x" << std::hex << mData << std::dec;
      }
      std::cout << " @ " << sc_core::sc_time_stamp() << std::endl;
    }
  }

  void run()
  {
    transaction_type trans;
    sc_core::sc_time t(sc_core::SC_ZERO_TIME);
    while (initTransaction(trans)) {
      logStartTransation(trans);
      socket->b_transport(trans, t);
      wait(t);
      logEndTransaction(trans);
      t = sc_core::SC_ZERO_TIME;
    }
    wait();

  }

  tlm::tlm_sync_enum nb_transport_bw(transaction_type &,phase_type &,sc_core::sc_time & )
  {
    assert(0);  // should never happen
    return tlm::TLM_COMPLETED;
  }

  void invalidate_direct_mem_ptr(sc_dt::uint64 start_range,
                                 sc_dt::uint64 end_range)
  {
    // No DMI support: ignore
  }

private:
  sc_core::sc_event mEndEvent;
  unsigned int mNrOfTransactions;
  unsigned int mBaseAddress;
  unsigned int mTransactionCount;
  unsigned int mData;
};

#endif