| 1 | /* The common simulator framework for GDB, the GNU Debugger. |
| 2 | |
| 3 | Copyright 2002-2013 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 "hw-main.h" |
| 24 | #include "hw-base.h" |
| 25 | |
| 26 | |
| 27 | struct hw_handle_mapping |
| 28 | { |
| 29 | cell_word external; |
| 30 | struct hw *phandle; |
| 31 | struct hw_instance *ihandle; |
| 32 | struct hw_handle_mapping *next; |
| 33 | }; |
| 34 | |
| 35 | |
| 36 | struct hw_handle_data |
| 37 | { |
| 38 | int nr_mappings; |
| 39 | struct hw_handle_mapping *mappings; |
| 40 | }; |
| 41 | |
| 42 | void |
| 43 | create_hw_handle_data (struct hw *hw) |
| 44 | { |
| 45 | if (hw_parent (hw) == NULL) |
| 46 | { |
| 47 | hw->handles_of_hw = HW_ZALLOC (hw, struct hw_handle_data); |
| 48 | } |
| 49 | else |
| 50 | { |
| 51 | hw->handles_of_hw = hw_root (hw)->handles_of_hw; |
| 52 | } |
| 53 | } |
| 54 | |
| 55 | void |
| 56 | delete_hw_handle_data (struct hw *hw) |
| 57 | { |
| 58 | /* NULL */ |
| 59 | } |
| 60 | |
| 61 | |
| 62 | |
| 63 | #if 0 |
| 64 | void |
| 65 | hw_handle_init (struct hw *hw) |
| 66 | { |
| 67 | struct hw_handle_mapping *current_map = db->mappings; |
| 68 | if (current_map != NULL) |
| 69 | { |
| 70 | db->nr_mappings = db->mappings->external; |
| 71 | /* verify that the mappings that were not removed are in |
| 72 | sequence down to nr 1 */ |
| 73 | while (current_map->next != NULL) |
| 74 | { |
| 75 | if (current_map->external != current_map->next->external + 1) |
| 76 | error ("hw_handle: hw_handle database possibly corrupt"); |
| 77 | current_map = current_map->next; |
| 78 | } |
| 79 | ASSERT (current_map->next == NULL); |
| 80 | if (current_map->external != 1) |
| 81 | error ("hw_handle: hw_handle database possibly corrupt"); |
| 82 | } |
| 83 | else |
| 84 | { |
| 85 | db->nr_mappings = 0; |
| 86 | } |
| 87 | } |
| 88 | #endif |
| 89 | |
| 90 | |
| 91 | struct hw_instance * |
| 92 | hw_handle_ihandle2 (struct hw *hw, |
| 93 | cell_word external) |
| 94 | { |
| 95 | struct hw_handle_data *db = hw->handles_of_hw; |
| 96 | struct hw_handle_mapping *current_map = db->mappings; |
| 97 | while (current_map != NULL) |
| 98 | { |
| 99 | if (current_map->external == external) |
| 100 | return current_map->ihandle; |
| 101 | current_map = current_map->next; |
| 102 | } |
| 103 | return (void*)0; |
| 104 | } |
| 105 | |
| 106 | |
| 107 | struct hw * |
| 108 | hw_handle_phandle2 (struct hw *hw, |
| 109 | cell_word external) |
| 110 | { |
| 111 | struct hw_handle_data *db = hw->handles_of_hw; |
| 112 | struct hw_handle_mapping *current_map = db->mappings; |
| 113 | while (current_map != NULL) |
| 114 | { |
| 115 | if (current_map->external == external) |
| 116 | return current_map->phandle; |
| 117 | current_map = current_map->next; |
| 118 | } |
| 119 | return (void*)0; |
| 120 | } |
| 121 | |
| 122 | |
| 123 | cell_word |
| 124 | hw_handle_2ihandle (struct hw *hw, |
| 125 | struct hw_instance *internal) |
| 126 | { |
| 127 | struct hw_handle_data *db = hw->handles_of_hw; |
| 128 | struct hw_handle_mapping *current_map = db->mappings; |
| 129 | while (current_map != NULL) |
| 130 | { |
| 131 | if (current_map->ihandle == internal) |
| 132 | return current_map->external; |
| 133 | current_map = current_map->next; |
| 134 | } |
| 135 | return 0; |
| 136 | } |
| 137 | |
| 138 | |
| 139 | cell_word |
| 140 | hw_handle_2phandle (struct hw *hw, |
| 141 | struct hw *internal) |
| 142 | { |
| 143 | struct hw_handle_data *db = hw->handles_of_hw; |
| 144 | struct hw_handle_mapping *current_map = db->mappings; |
| 145 | while (current_map != NULL) |
| 146 | { |
| 147 | if (current_map->phandle == internal) |
| 148 | return current_map->external; |
| 149 | current_map = current_map->next; |
| 150 | } |
| 151 | return 0; |
| 152 | } |
| 153 | |
| 154 | |
| 155 | void |
| 156 | hw_handle_add_ihandle (struct hw *hw, |
| 157 | struct hw_instance *internal) |
| 158 | { |
| 159 | struct hw_handle_data *db = hw->handles_of_hw; |
| 160 | if (hw_handle_2ihandle (hw, internal) != 0) |
| 161 | { |
| 162 | hw_abort (hw, "attempting to add an ihandle already in the data base"); |
| 163 | } |
| 164 | else |
| 165 | { |
| 166 | /* insert at the front making things in decending order */ |
| 167 | struct hw_handle_mapping *new_map = ZALLOC (struct hw_handle_mapping); |
| 168 | new_map->next = db->mappings; |
| 169 | new_map->ihandle = internal; |
| 170 | db->nr_mappings += 1; |
| 171 | new_map->external = db->nr_mappings; |
| 172 | db->mappings = new_map; |
| 173 | } |
| 174 | } |
| 175 | |
| 176 | |
| 177 | void |
| 178 | hw_handle_add_phandle (struct hw *hw, |
| 179 | struct hw *internal) |
| 180 | { |
| 181 | struct hw_handle_data *db = hw->handles_of_hw; |
| 182 | if (hw_handle_2phandle (hw, internal) != 0) |
| 183 | { |
| 184 | hw_abort (hw, "attempting to add a phandle already in the data base"); |
| 185 | } |
| 186 | else |
| 187 | { |
| 188 | /* insert at the front making things in decending order */ |
| 189 | struct hw_handle_mapping *new_map = ZALLOC (struct hw_handle_mapping); |
| 190 | new_map->next = db->mappings; |
| 191 | new_map->phandle = internal; |
| 192 | db->nr_mappings += 1; |
| 193 | new_map->external = db->nr_mappings; |
| 194 | db->mappings = new_map; |
| 195 | } |
| 196 | } |
| 197 | |
| 198 | |
| 199 | void |
| 200 | hw_handle_remove_ihandle (struct hw *hw, |
| 201 | struct hw_instance *internal) |
| 202 | { |
| 203 | struct hw_handle_data *db = hw->handles_of_hw; |
| 204 | struct hw_handle_mapping **current_map = &db->mappings; |
| 205 | while (*current_map != NULL) |
| 206 | { |
| 207 | if ((*current_map)->ihandle == internal) |
| 208 | { |
| 209 | struct hw_handle_mapping *delete = *current_map; |
| 210 | *current_map = delete->next; |
| 211 | free (delete); |
| 212 | return; |
| 213 | } |
| 214 | current_map = &(*current_map)->next; |
| 215 | } |
| 216 | hw_abort (hw, "attempt to remove nonexistant ihandle"); |
| 217 | } |
| 218 | |
| 219 | |
| 220 | void |
| 221 | hw_handle_remove_phandle (struct hw *hw, |
| 222 | struct hw *internal) |
| 223 | { |
| 224 | struct hw_handle_data *db = hw->handles_of_hw; |
| 225 | struct hw_handle_mapping **current_map = &db->mappings; |
| 226 | while (*current_map != NULL) |
| 227 | { |
| 228 | if ((*current_map)->phandle == internal) |
| 229 | { |
| 230 | struct hw_handle_mapping *delete = *current_map; |
| 231 | *current_map = delete->next; |
| 232 | free (delete); |
| 233 | return; |
| 234 | } |
| 235 | current_map = &(*current_map)->next; |
| 236 | } |
| 237 | hw_abort (hw, "attempt to remove nonexistant phandle"); |
| 238 | } |