| 1 | /* Hardware ports. |
| 2 | Copyright (C) 1998, 2007, 2008, 2009, 2010, 2011 |
| 3 | Free Software Foundation, Inc. |
| 4 | Contributed by Andrew Cagney and Cygnus Solutions. |
| 5 | |
| 6 | This file is part of GDB, the GNU debugger. |
| 7 | |
| 8 | This program is free software; you can redistribute it and/or modify |
| 9 | it under the terms of the GNU General Public License as published by |
| 10 | the Free Software Foundation; either version 3 of the License, or |
| 11 | (at your option) any later version. |
| 12 | |
| 13 | This program is distributed in the hope that it will be useful, |
| 14 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | GNU General Public License for more details. |
| 17 | |
| 18 | You should have received a copy of the GNU General Public License |
| 19 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| 20 | |
| 21 | |
| 22 | #include "hw-main.h" |
| 23 | #include "hw-base.h" |
| 24 | |
| 25 | #ifdef HAVE_STDLIB_H |
| 26 | #include <stdlib.h> |
| 27 | #endif |
| 28 | |
| 29 | #ifdef HAVE_STRING_H |
| 30 | #include <string.h> |
| 31 | #else |
| 32 | #ifdef HAVE_STRINGS_H |
| 33 | #include <strings.h> |
| 34 | #endif |
| 35 | #endif |
| 36 | |
| 37 | #include <ctype.h> |
| 38 | |
| 39 | |
| 40 | struct hw_port_edge |
| 41 | { |
| 42 | int my_port; |
| 43 | struct hw *dest; |
| 44 | int dest_port; |
| 45 | struct hw_port_edge *next; |
| 46 | object_disposition disposition; |
| 47 | }; |
| 48 | |
| 49 | struct hw_port_data |
| 50 | { |
| 51 | hw_port_event_method *to_port_event; |
| 52 | const struct hw_port_descriptor *ports; |
| 53 | struct hw_port_edge *edges; |
| 54 | }; |
| 55 | |
| 56 | const struct hw_port_descriptor empty_hw_ports[] = |
| 57 | { |
| 58 | { NULL, 0, 0, 0 }, |
| 59 | }; |
| 60 | |
| 61 | static void |
| 62 | panic_hw_port_event (struct hw *me, |
| 63 | int my_port, |
| 64 | struct hw *source, |
| 65 | int source_port, |
| 66 | int level) |
| 67 | { |
| 68 | hw_abort (me, "no port method"); |
| 69 | } |
| 70 | |
| 71 | void |
| 72 | create_hw_port_data (struct hw *me) |
| 73 | { |
| 74 | me->ports_of_hw = HW_ZALLOC (me, struct hw_port_data); |
| 75 | set_hw_port_event (me, panic_hw_port_event); |
| 76 | set_hw_ports (me, empty_hw_ports); |
| 77 | } |
| 78 | |
| 79 | void |
| 80 | delete_hw_port_data (struct hw *me) |
| 81 | { |
| 82 | hw_free (me, me->ports_of_hw); |
| 83 | me->ports_of_hw = NULL; |
| 84 | } |
| 85 | |
| 86 | void |
| 87 | set_hw_ports (struct hw *me, |
| 88 | const struct hw_port_descriptor ports[]) |
| 89 | { |
| 90 | me->ports_of_hw->ports = ports; |
| 91 | } |
| 92 | |
| 93 | void |
| 94 | set_hw_port_event (struct hw *me, |
| 95 | hw_port_event_method *port_event) |
| 96 | { |
| 97 | me->ports_of_hw->to_port_event = port_event; |
| 98 | } |
| 99 | |
| 100 | |
| 101 | static void |
| 102 | attach_hw_port_edge (struct hw *me, |
| 103 | struct hw_port_edge **list, |
| 104 | int my_port, |
| 105 | struct hw *dest, |
| 106 | int dest_port, |
| 107 | object_disposition disposition) |
| 108 | { |
| 109 | struct hw_port_edge *new_edge = HW_ZALLOC (me, struct hw_port_edge); |
| 110 | new_edge->my_port = my_port; |
| 111 | new_edge->dest = dest; |
| 112 | new_edge->dest_port = dest_port; |
| 113 | new_edge->next = *list; |
| 114 | new_edge->disposition = disposition; |
| 115 | *list = new_edge; |
| 116 | } |
| 117 | |
| 118 | |
| 119 | static void |
| 120 | detach_hw_port_edge (struct hw *me, |
| 121 | struct hw_port_edge **list, |
| 122 | int my_port, |
| 123 | struct hw *dest, |
| 124 | int dest_port) |
| 125 | { |
| 126 | while (*list != NULL) |
| 127 | { |
| 128 | struct hw_port_edge *old_edge = *list; |
| 129 | if (old_edge->dest == dest |
| 130 | && old_edge->dest_port == dest_port |
| 131 | && old_edge->my_port == my_port) |
| 132 | { |
| 133 | if (old_edge->disposition == permenant_object) |
| 134 | hw_abort (me, "attempt to delete permenant port edge"); |
| 135 | *list = old_edge->next; |
| 136 | hw_free (me, old_edge); |
| 137 | return; |
| 138 | } |
| 139 | } |
| 140 | hw_abort (me, "attempt to delete unattached port"); |
| 141 | } |
| 142 | |
| 143 | |
| 144 | #if 0 |
| 145 | static void |
| 146 | clean_hw_port_edges (struct hw_port_edge **list) |
| 147 | { |
| 148 | while (*list != NULL) |
| 149 | { |
| 150 | struct hw_port_edge *old_edge = *list; |
| 151 | switch (old_edge->disposition) |
| 152 | { |
| 153 | case permenant_object: |
| 154 | list = &old_edge->next; |
| 155 | break; |
| 156 | case temporary_object: |
| 157 | *list = old_edge->next; |
| 158 | hw_free (me, old_edge); |
| 159 | break; |
| 160 | } |
| 161 | } |
| 162 | } |
| 163 | #endif |
| 164 | |
| 165 | |
| 166 | /* Ports: */ |
| 167 | |
| 168 | void |
| 169 | hw_port_event (struct hw *me, |
| 170 | int my_port, |
| 171 | int level) |
| 172 | { |
| 173 | int found_an_edge = 0; |
| 174 | struct hw_port_edge *edge; |
| 175 | /* device's lines directly connected */ |
| 176 | for (edge = me->ports_of_hw->edges; |
| 177 | edge != NULL; |
| 178 | edge = edge->next) |
| 179 | { |
| 180 | if (edge->my_port == my_port) |
| 181 | { |
| 182 | edge->dest->ports_of_hw->to_port_event (edge->dest, |
| 183 | edge->dest_port, |
| 184 | me, |
| 185 | my_port, |
| 186 | level); |
| 187 | found_an_edge = 1; |
| 188 | } |
| 189 | } |
| 190 | if (!found_an_edge) |
| 191 | hw_abort (me, "No edge for port %d", my_port); |
| 192 | } |
| 193 | |
| 194 | |
| 195 | void |
| 196 | hw_port_attach (struct hw *me, |
| 197 | int my_port, |
| 198 | struct hw *dest, |
| 199 | int dest_port, |
| 200 | object_disposition disposition) |
| 201 | { |
| 202 | attach_hw_port_edge (me, |
| 203 | &me->ports_of_hw->edges, |
| 204 | my_port, |
| 205 | dest, |
| 206 | dest_port, |
| 207 | disposition); |
| 208 | } |
| 209 | |
| 210 | |
| 211 | void |
| 212 | hw_port_detach (struct hw *me, |
| 213 | int my_port, |
| 214 | struct hw *dest, |
| 215 | int dest_port) |
| 216 | { |
| 217 | detach_hw_port_edge (me, |
| 218 | &me->ports_of_hw->edges, |
| 219 | my_port, |
| 220 | dest, |
| 221 | dest_port); |
| 222 | } |
| 223 | |
| 224 | |
| 225 | void |
| 226 | hw_port_traverse (struct hw *me, |
| 227 | hw_port_traverse_function *handler, |
| 228 | void *data) |
| 229 | { |
| 230 | struct hw_port_edge *port_edge; |
| 231 | for (port_edge = me->ports_of_hw->edges; |
| 232 | port_edge != NULL; |
| 233 | port_edge = port_edge->next) |
| 234 | { |
| 235 | handler (me, port_edge->my_port, |
| 236 | port_edge->dest, port_edge->dest_port, |
| 237 | data); |
| 238 | } |
| 239 | } |
| 240 | |
| 241 | |
| 242 | int |
| 243 | hw_port_decode (struct hw *me, |
| 244 | const char *port_name, |
| 245 | port_direction direction) |
| 246 | { |
| 247 | if (port_name == NULL || port_name[0] == '\0') |
| 248 | return 0; |
| 249 | if (isdigit (port_name[0])) |
| 250 | { |
| 251 | return strtoul (port_name, NULL, 0); |
| 252 | } |
| 253 | else |
| 254 | { |
| 255 | const struct hw_port_descriptor *ports = |
| 256 | me->ports_of_hw->ports; |
| 257 | if (ports != NULL) |
| 258 | { |
| 259 | while (ports->name != NULL) |
| 260 | { |
| 261 | if (ports->direction == bidirect_port |
| 262 | || ports->direction == direction) |
| 263 | { |
| 264 | if (ports->nr_ports > 0) |
| 265 | { |
| 266 | int len = strlen (ports->name); |
| 267 | if (strncmp (port_name, ports->name, len) == 0) |
| 268 | { |
| 269 | if (port_name[len] == '\0') |
| 270 | return ports->number; |
| 271 | else if (isdigit (port_name[len])) |
| 272 | { |
| 273 | int port = (ports->number |
| 274 | + strtoul (&port_name[len], NULL, 0)); |
| 275 | if (port >= ports->number + ports->nr_ports) |
| 276 | hw_abort (me, |
| 277 | "Port %s out of range", |
| 278 | port_name); |
| 279 | return port; |
| 280 | } |
| 281 | } |
| 282 | } |
| 283 | else if (strcmp (port_name, ports->name) == 0) |
| 284 | return ports->number; |
| 285 | } |
| 286 | ports++; |
| 287 | } |
| 288 | } |
| 289 | } |
| 290 | hw_abort (me, "Unreconized port %s", port_name); |
| 291 | return 0; |
| 292 | } |
| 293 | |
| 294 | |
| 295 | int |
| 296 | hw_port_encode (struct hw *me, |
| 297 | int port_number, |
| 298 | char *buf, |
| 299 | int sizeof_buf, |
| 300 | port_direction direction) |
| 301 | { |
| 302 | const struct hw_port_descriptor *ports = NULL; |
| 303 | ports = me->ports_of_hw->ports; |
| 304 | if (ports != NULL) { |
| 305 | while (ports->name != NULL) |
| 306 | { |
| 307 | if (ports->direction == bidirect_port |
| 308 | || ports->direction == direction) |
| 309 | { |
| 310 | if (ports->nr_ports > 0) |
| 311 | { |
| 312 | if (port_number >= ports->number |
| 313 | && port_number < ports->number + ports->nr_ports) |
| 314 | { |
| 315 | strcpy (buf, ports->name); |
| 316 | sprintf (buf + strlen (buf), "%d", port_number - ports->number); |
| 317 | if (strlen (buf) >= sizeof_buf) |
| 318 | hw_abort (me, "hw_port_encode: buffer overflow"); |
| 319 | return strlen (buf); |
| 320 | } |
| 321 | } |
| 322 | else |
| 323 | { |
| 324 | if (ports->number == port_number) |
| 325 | { |
| 326 | if (strlen (ports->name) >= sizeof_buf) |
| 327 | hw_abort (me, "hw_port_encode: buffer overflow"); |
| 328 | strcpy (buf, ports->name); |
| 329 | return strlen (buf); |
| 330 | } |
| 331 | } |
| 332 | } |
| 333 | ports++; |
| 334 | } |
| 335 | } |
| 336 | sprintf (buf, "%d", port_number); |
| 337 | if (strlen (buf) >= sizeof_buf) |
| 338 | hw_abort (me, "hw_port_encode: buffer overflow"); |
| 339 | return strlen (buf); |
| 340 | } |