| 1 | /* The common simulator framework for GDB, the GNU Debugger. |
| 2 | |
| 3 | Copyright 2002-2016 Free Software Foundation, Inc. |
| 4 | |
| 5 | Contributed by Andrew Cagney and Red Hat. |
| 6 | |
| 7 | This file is part of GDB. |
| 8 | |
| 9 | This program is free software; you can redistribute it and/or modify |
| 10 | it under the terms of the GNU General Public License as published by |
| 11 | the Free Software Foundation; either version 3 of the License, or |
| 12 | (at your option) any later version. |
| 13 | |
| 14 | This program is distributed in the hope that it will be useful, |
| 15 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 17 | GNU General Public License for more details. |
| 18 | |
| 19 | You should have received a copy of the GNU General Public License |
| 20 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| 21 | |
| 22 | |
| 23 | #include "sim-main.h" |
| 24 | #include "hw-main.h" |
| 25 | |
| 26 | /* DEVICE |
| 27 | |
| 28 | core - root of the device tree |
| 29 | |
| 30 | DESCRIPTION |
| 31 | |
| 32 | The core device, positioned at the root of the device tree appears |
| 33 | to its child devices as a normal device just like every other |
| 34 | device in the tree. |
| 35 | |
| 36 | Internally it is implemented using a core object. Requests to |
| 37 | attach (or detach) address spaces are passed to that core object. |
| 38 | Requests to transfer (DMA) data are reflected back down the device |
| 39 | tree using the core_map data transfer methods. |
| 40 | |
| 41 | PROPERTIES |
| 42 | |
| 43 | None. |
| 44 | |
| 45 | */ |
| 46 | |
| 47 | |
| 48 | static void |
| 49 | dv_core_attach_address_callback (struct hw *me, |
| 50 | int level, |
| 51 | int space, |
| 52 | address_word addr, |
| 53 | address_word nr_bytes, |
| 54 | struct hw *client) |
| 55 | { |
| 56 | HW_TRACE ((me, "attach - level=%d, space=%d, addr=0x%lx, nr_bytes=%ld, client=%s", |
| 57 | level, space, (unsigned long) addr, (unsigned long) nr_bytes, hw_path (client))); |
| 58 | /* NOTE: At preset the space is assumed to be zero. Perhaphs the |
| 59 | space should be mapped onto something for instance: space0 - |
| 60 | unified memory; space1 - IO memory; ... */ |
| 61 | sim_core_attach (hw_system (me), |
| 62 | NULL, /*cpu*/ |
| 63 | level, |
| 64 | access_read_write_exec, |
| 65 | space, addr, |
| 66 | nr_bytes, |
| 67 | 0, /* modulo */ |
| 68 | client, |
| 69 | NULL); |
| 70 | } |
| 71 | |
| 72 | |
| 73 | static unsigned |
| 74 | dv_core_dma_read_buffer_callback (struct hw *me, |
| 75 | void *dest, |
| 76 | int space, |
| 77 | unsigned_word addr, |
| 78 | unsigned nr_bytes) |
| 79 | { |
| 80 | return sim_core_read_buffer (hw_system (me), |
| 81 | NULL, /*CPU*/ |
| 82 | space, /*???*/ |
| 83 | dest, |
| 84 | addr, |
| 85 | nr_bytes); |
| 86 | } |
| 87 | |
| 88 | |
| 89 | static unsigned |
| 90 | dv_core_dma_write_buffer_callback (struct hw *me, |
| 91 | const void *source, |
| 92 | int space, |
| 93 | unsigned_word addr, |
| 94 | unsigned nr_bytes, |
| 95 | int violate_read_only_section) |
| 96 | { |
| 97 | return sim_core_write_buffer (hw_system (me), |
| 98 | NULL, /*cpu*/ |
| 99 | space, /*???*/ |
| 100 | source, |
| 101 | addr, |
| 102 | nr_bytes); |
| 103 | } |
| 104 | |
| 105 | |
| 106 | static void |
| 107 | dv_core_finish (struct hw *me) |
| 108 | { |
| 109 | set_hw_attach_address (me, dv_core_attach_address_callback); |
| 110 | set_hw_dma_write_buffer (me, dv_core_dma_write_buffer_callback); |
| 111 | set_hw_dma_read_buffer (me, dv_core_dma_read_buffer_callback); |
| 112 | } |
| 113 | |
| 114 | const struct hw_descriptor dv_core_descriptor[] = { |
| 115 | { "core", dv_core_finish, }, |
| 116 | { NULL, NULL }, |
| 117 | }; |