Subversion Repositories openrisc_2011-10-31

/*  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_IOBUS_C_

#define _HW_IOBUS_C_

#ifndef STATIC_INLINE_HW_IOBUS

#define STATIC_INLINE_HW_IOBUS STATIC_INLINE

#endif

#include "device_table.h"

/* DEVICE

   iobus - simple bus for attaching devices

   DESCRIPTION

   IOBUS provides a simple `local' bus for attaching (hanging)

   programmed IO devices from.  All child devices are directly mapped

   into this devices parent address space (after checking that the

   attach address lies within the <<iobus>> address range.  address).

   PROPERTIES

   None.

   */

static void

hw_iobus_attach_address_callback(device *me,

                                 attach_type type,

                                 int space,

                                 unsigned_word addr,

                                 unsigned nr_bytes,

                                 access_type access,

                                 device *client) /*callback/default*/

{

  int attach_space;

  unsigned_word attach_address;

  /* sanity check */

  if (space != 0)

    device_error(me, "invalid space (%d) specified by %s",

                 space, device_path(client));

  /* get the bus address */

  device_address_to_attach_address(device_parent(me),

                                   device_unit_address(me),

                                   &attach_space,

                                   &attach_address,

                                   me);

  if (addr < attach_address)

    device_error(me, "Invalid attach address 0x%lx", (unsigned long)addr);

  device_attach_address(device_parent(me),

                        type,

                        attach_space,

                        addr,

                        nr_bytes,

                        access,

                        client);

}

static device_callbacks const hw_iobus_callbacks = {

  { NULL, },

  { hw_iobus_attach_address_callback, },

  { NULL, }, /* IO */

  { NULL, }, /* DMA */

  { NULL, }, /* interrupt */

  { generic_device_unit_decode,

    generic_device_unit_encode,

    generic_device_address_to_attach_address,

    generic_device_size_to_attach_size }

};

const device_descriptor hw_iobus_device_descriptor[] = {

  { "iobus", NULL, &hw_iobus_callbacks },

  { NULL, },

};

#endif /* _HW_IOBUS_ */