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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_ */
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