/* ES40 emulator.
 * Copyright (C) 2007-2008 by the ES40 Emulator Project
 *
 * Website: http://sourceforge.net/projects/es40
 * E-mail : camiel@camicom.com
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 *
 * Although this is not required, the author would appreciate being notified of,
 * and receiving any modifications you may make to the source code that might serve
 * the general public.
 */

 /**
  * \file
  * Contains the definitions for the emulated Flash ROM devices.
  *
  * $Id$
  *
  * X-1.11       Camiel Vanderhoeven                             02-JAN-2008
  *      Comments.
  *
  * X-1.10        Camiel Vanderhoeven                             17-DEC-2007
  *      SaveState file format 2.1
  *
  * X-1.9        Camiel Vanderhoeven                             10-DEC-2007
  *      Changes to make the TraceEngine work again after recent changes.
  *
  * X-1.8        Camiel Vanderhoeven                             10-DEC-2007
  *      Use configurator.
  *
  * X-1.7        Camiel Vanderhoeven                             30-MAR-2007
  *      Added old changelog comments.
  *
  * X-1.6        Camiel Vanderhoeven                             16-FEB-2007
  *      Added SaveStateF and RestoreStateF functions.
  *
  * X-1.5        Camiel Vanderhoeven                             12-FEB-2007
  *      Formatting.
  *
  * X-1.4        Camiel Vanderhoeven                             12-FEB-2007
  *      Added comments.
  *
  * X-1.3        Camiel Vanderhoeven                             7-FEB-2007
  *      Added comments.
  *
  * X-1.2        Brian Wheeler                                   3-FEB-2007
  *      Formatting.
  *
  * X-1.1        Camiel Vanderhoeven                             19-JAN-2007
  *      Initial version in CVS.
  *
  *
  * \author Camiel Vanderhoeven (camiel@camicom.com / http://www.camicom.com)
  **/
#if !defined(INCLUDED_FLASH_H)
#define INCLUDED_FLASH_H

#include "SystemComponent.h"

  /**
   * \brief Emulated flash memory.
   *
   * Flash memory is only used for storing configuration data (such as SRM console variables),
   * it is not used for firmware.
   **/
class CFlash : public CSystemComponent
{
public:
  virtual void  WriteMem(int index, u64 address, int dsize, u64 data);
  virtual u64   ReadMem(int index, u64 address, int dsize);
  CFlash(CConfigurator* cfg, class CSystem* c);
  virtual       ~CFlash();
  virtual int   SaveState(FILE* f);
  virtual int   RestoreState(FILE* f);
  virtual void  check_state();
  void          SaveStateF();
  void          RestoreStateF();
  void          SaveStateF(char* fn);
  void          RestoreStateF(char* fn);

  // Boot-firmware helpers (persistent flash-backed firmware)
  bool HasBootFirmware() const;
  const u8 * GetFlashBytes() const;   // 2MB dense image
  void FlushIfDirty();

protected:
  bool   dirty       = false;
  time_t last_dirty  = 0;   // wall-clock when dirty was last (re)set

  struct SFlash_state
  {
    u8  Flash[2 * 1024 * 1024];
    int mode;
  } state;
};

extern CFlash* theSROM;
#endif // !defined(INCLUDED_FLASH_H)