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

  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.

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

//====================================================================
//  Nov 06, 2008
//
//  Updated by:
//    Xiaopeng Qiu, JEDA Technologies, Inc
//    Email:  qiuxp@jedatechnologies.net
//
//  To fix violations of TLM2.0 rules, which are detected by JEDA 
//  TLM2.0 checker.
//
//====================================================================

#ifndef __SIMPLE_LT_INITIATOR3_H__
#define __SIMPLE_LT_INITIATOR3_H__

#include "tlm.h"
#include "tlm_utils/simple_initiator_socket.h"
//#include <systemc>
#include <cassert>
//#include <iostream>

class SimpleLTInitiator3 : public sc_core::sc_module
{
public:
  typedef tlm::tlm_generic_payload                  transaction_type;
  typedef tlm::tlm_phase                            phase_type;
  typedef tlm::tlm_sync_enum                        sync_enum_type;
  typedef tlm_utils::simple_initiator_socket<SimpleLTInitiator3> initiator_socket_type;

public:
  initiator_socket_type socket;

public:
  SC_HAS_PROCESS(SimpleLTInitiator3);
  SimpleLTInitiator3(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)
  {
    // 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);
    trans.set_streaming_width(4);
    trans.set_dmi_allowed(false);
    trans.set_response_status(tlm::TLM_INCOMPLETE_RESPONSE);

    ++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;
    
    while (initTransaction(trans)) {
      // Create transaction and initialise t
      t = sc_core::SC_ZERO_TIME;

      logStartTransation(trans);

      socket->b_transport(trans, t);
      // Transaction Finished, wait for the returned delay
      wait(t);

      logEndTransaction(trans);
    }
    wait();

  }

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

#endif
