112922Sgabeblack@google.com/*****************************************************************************
212922Sgabeblack@google.com
312922Sgabeblack@google.com  Licensed to Accellera Systems Initiative Inc. (Accellera) under one or
412922Sgabeblack@google.com  more contributor license agreements.  See the NOTICE file distributed
512922Sgabeblack@google.com  with this work for additional information regarding copyright ownership.
612922Sgabeblack@google.com  Accellera licenses this file to you under the Apache License, Version 2.0
712922Sgabeblack@google.com  (the "License"); you may not use this file except in compliance with the
812922Sgabeblack@google.com  License.  You may obtain a copy of the License at
912922Sgabeblack@google.com
1012922Sgabeblack@google.com    http://www.apache.org/licenses/LICENSE-2.0
1112922Sgabeblack@google.com
1212922Sgabeblack@google.com  Unless required by applicable law or agreed to in writing, software
1312922Sgabeblack@google.com  distributed under the License is distributed on an "AS IS" BASIS,
1412922Sgabeblack@google.com  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
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1812922Sgabeblack@google.com *****************************************************************************/
1912922Sgabeblack@google.com
2012922Sgabeblack@google.com#ifndef __SIMPLE_AT_TARGET1_H__
2112922Sgabeblack@google.com#define __SIMPLE_AT_TARGET1_H__
2212922Sgabeblack@google.com
2312922Sgabeblack@google.com#include "tlm.h"
2412922Sgabeblack@google.com#include "tlm_utils/simple_target_socket.h"
2512922Sgabeblack@google.com//#include <systemc>
2612922Sgabeblack@google.com#include <cassert>
2712922Sgabeblack@google.com#include <vector>
2812922Sgabeblack@google.com#include <queue>
2912922Sgabeblack@google.com//#include <iostream>
3012922Sgabeblack@google.com
3112922Sgabeblack@google.comclass SimpleATTarget1 : public sc_core::sc_module
3212922Sgabeblack@google.com{
3312922Sgabeblack@google.compublic:
3412922Sgabeblack@google.com  typedef tlm::tlm_generic_payload            transaction_type;
3512922Sgabeblack@google.com  typedef tlm::tlm_phase                      phase_type;
3612922Sgabeblack@google.com  typedef tlm::tlm_sync_enum                  sync_enum_type;
3712922Sgabeblack@google.com  typedef tlm_utils::simple_target_socket<SimpleATTarget1> target_socket_type;
3812922Sgabeblack@google.com
3912922Sgabeblack@google.compublic:
4012922Sgabeblack@google.com  target_socket_type socket;
4112922Sgabeblack@google.com
4212922Sgabeblack@google.compublic:
4312922Sgabeblack@google.com  SC_HAS_PROCESS(SimpleATTarget1);
4412922Sgabeblack@google.com  SimpleATTarget1(sc_core::sc_module_name name) :
4512922Sgabeblack@google.com    sc_core::sc_module(name),
4612922Sgabeblack@google.com    socket("socket"),
4712922Sgabeblack@google.com    ACCEPT_DELAY(25, sc_core::SC_NS),
4812922Sgabeblack@google.com    RESPONSE_DELAY(100, sc_core::SC_NS)
4912922Sgabeblack@google.com  {
5012922Sgabeblack@google.com    // register nb_transport method
5112922Sgabeblack@google.com    socket.register_nb_transport_fw(this, &SimpleATTarget1::myNBTransport);
5212922Sgabeblack@google.com
5312922Sgabeblack@google.com    SC_METHOD(endRequest)
5412922Sgabeblack@google.com    sensitive << mEndRequestEvent;
5512922Sgabeblack@google.com    dont_initialize();
5612922Sgabeblack@google.com
5712922Sgabeblack@google.com    SC_METHOD(beginResponse)
5812922Sgabeblack@google.com    sensitive << mBeginResponseEvent;
5912922Sgabeblack@google.com    dont_initialize();
6012922Sgabeblack@google.com
6112922Sgabeblack@google.com    SC_METHOD(endResponse)
6212922Sgabeblack@google.com    sensitive << mEndResponseEvent;
6312922Sgabeblack@google.com    dont_initialize();
6412922Sgabeblack@google.com  }
6512922Sgabeblack@google.com
6612922Sgabeblack@google.com  //
6712922Sgabeblack@google.com  // Simple AT target
6812922Sgabeblack@google.com  // - Request is accepted after ACCEPT delay (relative to end of prev request
6912922Sgabeblack@google.com  //   phase)
7012922Sgabeblack@google.com  // - Response is started after RESPONSE delay (relative to end of prev resp
7112922Sgabeblack@google.com  //   phase)
7212922Sgabeblack@google.com  //
7312922Sgabeblack@google.com  sync_enum_type myNBTransport(transaction_type& trans, phase_type& phase, sc_core::sc_time& t)
7412922Sgabeblack@google.com  {
7512922Sgabeblack@google.com    if (phase == tlm::BEGIN_REQ) {
7612922Sgabeblack@google.com      // transactions may be kept in queue after the initiator has send END_REQ
7712922Sgabeblack@google.com      trans.acquire();
7812922Sgabeblack@google.com
7912922Sgabeblack@google.com      sc_dt::uint64 address = trans.get_address();
8012922Sgabeblack@google.com      assert(address < 400);
8112922Sgabeblack@google.com
8212922Sgabeblack@google.com      unsigned int& data = *reinterpret_cast<unsigned int*>(trans.get_data_ptr());
8312922Sgabeblack@google.com      if (trans.get_command() == tlm::TLM_WRITE_COMMAND) {
8412922Sgabeblack@google.com        std::cout << name() << ": Received write request: A = 0x"
8512922Sgabeblack@google.com                  << std::hex << (unsigned int)address << ", D = 0x"
8612922Sgabeblack@google.com                  << data << std::dec
8712922Sgabeblack@google.com                  << " @ " << sc_core::sc_time_stamp() << std::endl;
8812922Sgabeblack@google.com
8912922Sgabeblack@google.com        *reinterpret_cast<unsigned int*>(&mMem[address]) = data;
9012922Sgabeblack@google.com
9112922Sgabeblack@google.com      } else {
9212922Sgabeblack@google.com        std::cout << name() << ": Received read request: A = 0x"
9312922Sgabeblack@google.com                  << std::hex << (unsigned int)address << std::dec
9412922Sgabeblack@google.com                  << " @ " << sc_core::sc_time_stamp() << std::endl;
9512922Sgabeblack@google.com
9612922Sgabeblack@google.com        data = *reinterpret_cast<unsigned int*>(&mMem[address]);
9712922Sgabeblack@google.com      }
9812922Sgabeblack@google.com
9912922Sgabeblack@google.com      // Notify end of request phase after ACCEPT delay
10012922Sgabeblack@google.com      if (mEndRequestQueue.empty()) {
10112922Sgabeblack@google.com        mEndRequestEvent.notify(t + ACCEPT_DELAY);
10212922Sgabeblack@google.com      }
10312922Sgabeblack@google.com      mEndRequestQueue.push(&trans);
10412922Sgabeblack@google.com
10512922Sgabeblack@google.com      // AT-noTA target
10612922Sgabeblack@google.com      // - always return false
10712922Sgabeblack@google.com      // - seperate call to indicate end of phase (do not update phase or t)
10812922Sgabeblack@google.com      return tlm::TLM_ACCEPTED;
10912922Sgabeblack@google.com
11012922Sgabeblack@google.com    } else if (phase == tlm::END_RESP) {
11112922Sgabeblack@google.com
11212922Sgabeblack@google.com      // response phase ends after t
11312922Sgabeblack@google.com      mEndResponseEvent.notify(t);
11412922Sgabeblack@google.com
11512922Sgabeblack@google.com      return tlm::TLM_COMPLETED;
11612922Sgabeblack@google.com    }
11712922Sgabeblack@google.com
11812922Sgabeblack@google.com    // Not possible
11912922Sgabeblack@google.com    assert(0); exit(1);
12012922Sgabeblack@google.com//    return tlm::TLM_COMPLETED;  //unreachable code
12112922Sgabeblack@google.com  }
12212922Sgabeblack@google.com
12312922Sgabeblack@google.com  void endRequest()
12412922Sgabeblack@google.com  {
12512922Sgabeblack@google.com    assert(!mEndRequestQueue.empty());
12612922Sgabeblack@google.com    // end request phase of oldest transaction
12712922Sgabeblack@google.com    phase_type phase = tlm::END_REQ;
12812922Sgabeblack@google.com    sc_core::sc_time t = sc_core::SC_ZERO_TIME;
12912922Sgabeblack@google.com    transaction_type* trans = mEndRequestQueue.front();
13012922Sgabeblack@google.com    assert(trans);
13112922Sgabeblack@google.com    mEndRequestQueue.pop();
13212922Sgabeblack@google.com    #if ( ! NDEBUG )
13312922Sgabeblack@google.com    sync_enum_type r = socket->nb_transport_bw(*trans, phase, t);
13412922Sgabeblack@google.com    #endif /* ! NDEBUG */
13512922Sgabeblack@google.com    assert(r == tlm::TLM_ACCEPTED); // FIXME: initiator should return TLM_ACCEPTED?
13612922Sgabeblack@google.com    assert(t == sc_core::SC_ZERO_TIME); // t must be SC_ZERO_TIME
13712922Sgabeblack@google.com
13812922Sgabeblack@google.com    // Notify end of request phase for next transaction after ACCEPT delay
13912922Sgabeblack@google.com    if (!mEndRequestQueue.empty()) {
14012922Sgabeblack@google.com      mEndRequestEvent.notify(ACCEPT_DELAY);
14112922Sgabeblack@google.com    }
14212922Sgabeblack@google.com
14312922Sgabeblack@google.com    if (mResponseQueue.empty()) {
14412922Sgabeblack@google.com      // Start processing transaction
14512922Sgabeblack@google.com      // Notify begin of response phase after RESPONSE delay
14612922Sgabeblack@google.com      mBeginResponseEvent.notify(RESPONSE_DELAY);
14712922Sgabeblack@google.com    }
14812922Sgabeblack@google.com    mResponseQueue.push(trans);
14912922Sgabeblack@google.com  }
15012922Sgabeblack@google.com
15112922Sgabeblack@google.com  void beginResponse()
15212922Sgabeblack@google.com  {
15312922Sgabeblack@google.com    assert(!mResponseQueue.empty());
15412922Sgabeblack@google.com    // start response phase of oldest transaction
15512922Sgabeblack@google.com    phase_type phase = tlm::BEGIN_RESP;
15612922Sgabeblack@google.com    sc_core::sc_time t = sc_core::SC_ZERO_TIME;
15712922Sgabeblack@google.com    transaction_type* trans = mResponseQueue.front();
15812922Sgabeblack@google.com    assert(trans);
15912922Sgabeblack@google.com
16012922Sgabeblack@google.com    // Set response data
16112922Sgabeblack@google.com    trans->set_response_status(tlm::TLM_OK_RESPONSE);
16212922Sgabeblack@google.com    if (trans->get_command() == tlm::TLM_READ_COMMAND) {
16312922Sgabeblack@google.com       sc_dt::uint64 address = trans->get_address();
16412922Sgabeblack@google.com       assert(address < 400);
16512922Sgabeblack@google.com      *reinterpret_cast<unsigned int*>(trans->get_data_ptr()) =
16612922Sgabeblack@google.com        *reinterpret_cast<unsigned int*>(&mMem[address]);
16712922Sgabeblack@google.com    }
16812922Sgabeblack@google.com
16912922Sgabeblack@google.com    switch (socket->nb_transport_bw(*trans, phase, t)) {
17012922Sgabeblack@google.com    case tlm::TLM_COMPLETED:
17112922Sgabeblack@google.com      // response phase ends after t
17212922Sgabeblack@google.com      mEndResponseEvent.notify(t);
17312922Sgabeblack@google.com      break;
17412922Sgabeblack@google.com
17512922Sgabeblack@google.com    case tlm::TLM_ACCEPTED:
17612922Sgabeblack@google.com    case tlm::TLM_UPDATED:
17712922Sgabeblack@google.com     // initiator will call nb_transport to indicate end of response phase
17812922Sgabeblack@google.com     break;
17912922Sgabeblack@google.com
18012922Sgabeblack@google.com    default:
18112922Sgabeblack@google.com      assert(0); exit(1);
18212922Sgabeblack@google.com    };
18312922Sgabeblack@google.com  }
18412922Sgabeblack@google.com
18512922Sgabeblack@google.com  void endResponse()
18612922Sgabeblack@google.com  {
18712922Sgabeblack@google.com    assert(!mResponseQueue.empty());
18812922Sgabeblack@google.com    mResponseQueue.front()->release();
18912922Sgabeblack@google.com    mResponseQueue.pop();
19012922Sgabeblack@google.com
19112922Sgabeblack@google.com    if (!mResponseQueue.empty()) {
19212922Sgabeblack@google.com      // Start processing next transaction
19312922Sgabeblack@google.com      // Notify begin of response phase after RESPONSE delay
19412922Sgabeblack@google.com      mBeginResponseEvent.notify(RESPONSE_DELAY);
19512922Sgabeblack@google.com    }
19612922Sgabeblack@google.com  }
19712922Sgabeblack@google.com
19812922Sgabeblack@google.comprivate:
19912922Sgabeblack@google.com  const sc_core::sc_time ACCEPT_DELAY;
20012922Sgabeblack@google.com  const sc_core::sc_time RESPONSE_DELAY;
20112922Sgabeblack@google.com
20212922Sgabeblack@google.comprivate:
20312922Sgabeblack@google.com  unsigned char mMem[400];
20412922Sgabeblack@google.com  std::queue<transaction_type*> mEndRequestQueue;
20512922Sgabeblack@google.com  sc_core::sc_event mEndRequestEvent;
20612922Sgabeblack@google.com  std::queue<transaction_type*> mResponseQueue;
20712922Sgabeblack@google.com  sc_core::sc_event mBeginResponseEvent;
20812922Sgabeblack@google.com  sc_core::sc_event mEndResponseEvent;
20912922Sgabeblack@google.com};
21012922Sgabeblack@google.com
21112922Sgabeblack@google.com#endif
212