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/* The common simulator framework for GDB, the GNU Debugger.
Copyright 2002-2021 Free Software Foundation, Inc.
Contributed by Andrew Cagney and Red Hat.
This file is part of GDB.
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/>. */
#include "sim-main.h"
#include "hw-main.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
dv_core_attach_address_callback (struct hw *me,
int level,
int space,
address_word addr,
address_word nr_bytes,
struct hw *client)
{
HW_TRACE ((me, "attach - level=%d, space=%d, addr=0x%lx, nr_bytes=%ld, client=%s",
level, space, (unsigned long) addr, (unsigned long) nr_bytes, hw_path (client)));
/* NOTE: At preset the space is assumed to be zero. Perhaphs the
space should be mapped onto something for instance: space0 -
unified memory; space1 - IO memory; ... */
sim_core_attach (hw_system (me),
NULL, /*cpu*/
level,
access_read_write_exec,
space, addr,
nr_bytes,
0, /* modulo */
client,
NULL);
}
static unsigned
dv_core_dma_read_buffer_callback (struct hw *me,
void *dest,
int space,
unsigned_word addr,
unsigned nr_bytes)
{
return sim_core_read_buffer (hw_system (me),
NULL, /*CPU*/
space, /*???*/
dest,
addr,
nr_bytes);
}
static unsigned
dv_core_dma_write_buffer_callback (struct hw *me,
const void *source,
int space,
unsigned_word addr,
unsigned nr_bytes,
int violate_read_only_section)
{
return sim_core_write_buffer (hw_system (me),
NULL, /*cpu*/
space, /*???*/
source,
addr,
nr_bytes);
}
static void
dv_core_finish (struct hw *me)
{
set_hw_attach_address (me, dv_core_attach_address_callback);
set_hw_dma_write_buffer (me, dv_core_dma_write_buffer_callback);
set_hw_dma_read_buffer (me, dv_core_dma_read_buffer_callback);
}
const struct hw_descriptor dv_core_descriptor[] = {
{ "core", dv_core_finish, },
{ NULL, NULL },
};
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