| /* 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/>. */ |
| |
| /* This must come before any other includes. */ |
| #include "defs.h" |
| |
| #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 }, |
| }; |