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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 3 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, see <http://www.gnu.org/licenses/>.
*/
#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_ */
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