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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_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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