xref: /gem5/src/systemc/tests/tlm/multi_sockets/simpleAddressMap.h

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

  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
  permissions and limitations under the License.

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

#ifndef __simpleAddressMap_h__
#define __simpleAddressMap_h__

#include <systemc>
#include <map>


//--------------------------------------------------------------------------
/**
 * Simple address map implementation for the generic protocol.
 */
//--------------------------------------------------------------------------
class SimpleAddressMap
{
  typedef std::map<sc_dt::uint64, unsigned int> mapType;
  typedef std::map<sc_dt::uint64, unsigned int>::iterator addressMapIterator;

public:
  SimpleAddressMap() {}

  //--------------------------------------------------------------------------
  /**
   * Check for overlapping address ranges
   */
  //--------------------------------------------------------------------------
  void checkSanity()
  {
    addressMapIterator pos;
    for (pos=m_addressMap.begin();pos!=m_addressMap.end();++pos){
      if(pos->second!=255)
        SC_REPORT_ERROR("SimpleAddressMap","Overlapping Address Regions.");
      else
        ++pos;
      if(pos->second==255)
        SC_REPORT_ERROR("SimpleAddressMap","Overlapping Address Regions.");
    }
    std::cout<<"Address check successful."<<std::endl;
  }


  //--------------------------------------------------------------------------
  /**
   * Print map
   */
  //--------------------------------------------------------------------------
  void dumpMap()
  {
    std::cout<<"SimpleAddressMap: printing the sorted MAP:"<<std::endl;
    addressMapIterator pos;
    for (pos=m_addressMap.begin();pos!=m_addressMap.end();++pos){
      if(pos->second==255)
        printf("key: %x    value: %i \n", (unsigned int) ((pos->first+1)>>1)-1, pos->second);
      else
        printf("key: %x    value: %i \n", (unsigned int) (pos->first>>1)-1, pos->second);
    }
  }


  //--------------------------------------------------------------------------
  /**
   * Decode slave address.
   * @param address_ A slave address.
   * @return The decoded slave port number. On error, the value 255 is returned.
   */
  //--------------------------------------------------------------------------
  unsigned int decode(sc_dt::uint64 address_)
  {
    addressMapIterator lbound;

    lbound=m_addressMap.lower_bound((address_+1)<<1);
    if((lbound->second == 255) | (lbound==m_addressMap.end())){
      SC_REPORT_ERROR("SimpleAddressMap", "Address does not match any registered address range.");
    }
    else{
      return lbound->second;
    }
    return 255;
  }

  const sc_dt::uint64& get_max(){
    if (m_addressMap.size()){
      addressMapIterator i=(m_addressMap.end());
      i--;
      retval=(i->first>>1)-1;
      return retval;
    }
    else {
      SC_REPORT_ERROR("SimpleAddressMap", "get_max() called on empty address map.");
      return retval;
    }
  }

  const sc_dt::uint64& get_min(){
    if (m_addressMap.size()){
      addressMapIterator i=(m_addressMap.begin());
      retval=((i->first+1)>>1)-1;
      return retval;
    }
    else {
      SC_REPORT_ERROR("SimpleAddressMap", "get_min() called on empty address map.");
      return retval;
    }
  }

  //--------------------------------------------------------------------------
  /**
   * Insert a slave into the address map
   */
  //--------------------------------------------------------------------------
  void insert(sc_dt::uint64 baseAddress_, sc_dt::uint64 highAddress_, unsigned int portNumber_)
  {
    if(baseAddress_>highAddress_)
      SC_REPORT_ERROR("SimpleAddressMap", "Base address must be lower than high address.");
    if(portNumber_>=255)
      SC_REPORT_ERROR("SimpleAddressMap", "Only ;-) 255 targets can be handled.");
    m_addressMap.insert(mapType::value_type(((baseAddress_+1)<<1)-1,    255    ));
    m_addressMap.insert(mapType::value_type( (highAddress_+1)<<1   ,portNumber_));
  }

private:
  sc_dt::uint64 retval;
  /// the address map
  mapType m_addressMap;
};




#endif