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/*  This file is part of the program psim.

    Copyright (C) 1994-1996, Andrew Cagney <cagney@highland.com.au>

    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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.

    */

#ifndef _HW_CORE_C_

#define _HW_CORE_C_

#include "device_table.h"

#include "corefile.h"

/* DEVICE

   core - root of the device tree

   DESCRIPTION

   The core device positioned at the root of the device tree appears

   to its child devices as a normal device just like every other

   device in the tree.

   Internally it is implemented using a core object.  Requests to

   attach (or detach) address spaces are passed to that core object.

   Requests to transfer (DMA) data are reflected back down the device

   tree using the core_map data transfer methods.

   PROPERTIES

   None.

   */

static void

hw_core_init_address_callback(device *me)

{

  core *memory = (core*)device_data(me);

  core_init(memory);

}

static void

hw_core_attach_address_callback(device *me,

                                attach_type attach,

                                int space,

                                unsigned_word addr,

                                unsigned nr_bytes,

                                access_type access,

                                device *client) /*callback/default*/

{

  core *memory = (core*)device_data(me);

  if (space != 0)

    error("core_attach_address_callback() invalid address space\n");

  core_attach(memory,

              attach,

              space,

              access,

              addr,

              nr_bytes,

              client);

}

static unsigned

hw_core_dma_read_buffer_callback(device *me,

                                 void *dest,

                                 int space,

                                 unsigned_word addr,

                                 unsigned nr_bytes)

{

  core *memory = (core*)device_data(me);

  return core_map_read_buffer(core_readable(memory),

                              dest,

                              addr,

                              nr_bytes);

}

static unsigned

hw_core_dma_write_buffer_callback(device *me,

                                  const void *source,

                                  int space,

                                  unsigned_word addr,

                                  unsigned nr_bytes,

                                  int violate_read_only_section)

{

  core *memory = (core*)device_data(me);

  core_map *map = (violate_read_only_section

                   ? core_readable(memory)

                   : core_writeable(memory));

  return core_map_write_buffer(map,

                               source,

                               addr,

                               nr_bytes);

}

static device_callbacks const hw_core_callbacks = {

  { hw_core_init_address_callback, },

  { hw_core_attach_address_callback, },

  { NULL, }, /* IO */

  { hw_core_dma_read_buffer_callback,

    hw_core_dma_write_buffer_callback, },

  { NULL, }, /* interrupt */

  { generic_device_unit_decode,

    generic_device_unit_encode,

    generic_device_address_to_attach_address,

    generic_device_size_to_attach_size, },

};

static void *

hw_core_create(const char *name,

               const device_unit *unit_address,

               const char *args)

{

  core *memory = core_create();

  return memory;

}

const device_descriptor hw_core_device_descriptor[] = {

  { "core", hw_core_create, &hw_core_callbacks },

  { NULL },

};

#endif /* _HW_CORE_C_ */