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

  Licensed to Accellera Systems Initiative Inc. (Accellera) under one or
  more contributor license agreements.  See the NOTICE file distributed
  with this work for additional information regarding copyright ownership.
  Accellera licenses this file to you under the Apache License, Version 2.0
  (the "License"); you may not use this file except in compliance with the
  License.  You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

  Unless required by applicable law or agreed to in writing, software
  distributed under the License is distributed on an "AS IS" BASIS,
  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
  implied.  See the License for the specific language governing
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 *****************************************************************************/

//====================================================================
//  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 __CORE_DECOUPLING_LT_INITIATOR_H__
#define __CORE_DECOUPLING_LT_INITIATOR_H__

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

class CoreDecouplingLTInitiator : public sc_core::sc_module
{
public:
  typedef tlm::tlm_generic_payload                         transaction_type;
  typedef tlm_utils::simple_initiator_socket<CoreDecouplingLTInitiator> initiator_socket_type;

public:
  initiator_socket_type socket;

public:
  SC_HAS_PROCESS(CoreDecouplingLTInitiator);
  CoreDecouplingLTInitiator(sc_core::sc_module_name name,
                            unsigned int nrOfTransactions = 0x5,
                            unsigned int baseAddress = 0) :
    sc_core::sc_module(name),
    socket("socket"),
    mNrOfTransactions(nrOfTransactions),
    mBaseAddress(baseAddress),
    mTransactionCount(0)
  {
    tlm_utils::tlm_quantumkeeper::set_global_quantum(sc_core::sc_time(500, sc_core::SC_NS));
    mQuantumKeeper.reset();

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

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

  void run()
  {
    transaction_type trans;

    while (initTransaction(trans)) {
      logStartTransation(trans);
      
      // exec instr
      sc_core::sc_time t = mQuantumKeeper.get_local_time();
      socket->b_transport(trans, t);
      mQuantumKeeper.set(t);
      // Target may have added a delay to the quantum -> sync if needed
      if (mQuantumKeeper.need_sync()) {
        std::cout << "Sync'ing..." << std::endl;
        mQuantumKeeper.sync();
      }

      logEndTransaction(trans);
    }
    wait();
  }

private:
  unsigned int mNrOfTransactions;
  unsigned int mBaseAddress;
  unsigned int mTransactionCount;
  unsigned int mData;
  tlm_utils::tlm_quantumkeeper mQuantumKeeper;
};

#endif