| 1 | /* Hardware ports. |
| 2 | Copyright (C) 1998 Free Software Foundation, Inc. |
| 3 | Contributed by Andrew Cagney and Cygnus Solutions. |
| 4 | |
| 5 | This file is part of GDB, the GNU debugger. |
| 6 | |
| 7 | This program is free software; you can redistribute it and/or modify |
| 8 | it under the terms of the GNU General Public License as published by |
| 9 | the Free Software Foundation; either version 2, or (at your option) |
| 10 | any later version. |
| 11 | |
| 12 | This program is distributed in the hope that it will be useful, |
| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | GNU General Public License for more details. |
| 16 | |
| 17 | You should have received a copy of the GNU General Public License along |
| 18 | with this program; if not, write to the Free Software Foundation, Inc., |
| 19 | 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
| 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 | #define TRACE(x,y) |
| 40 | |
| 41 | |
| 42 | struct hw_port_edge { |
| 43 | int my_port; |
| 44 | struct hw *dest; |
| 45 | int dest_port; |
| 46 | struct hw_port_edge *next; |
| 47 | object_disposition disposition; |
| 48 | }; |
| 49 | |
| 50 | struct hw_port_data { |
| 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 | { NULL, }, |
| 58 | }; |
| 59 | |
| 60 | static void |
| 61 | panic_hw_port_event (struct hw *me, |
| 62 | int my_port, |
| 63 | struct hw *source, |
| 64 | int source_port, |
| 65 | int level) |
| 66 | { |
| 67 | hw_abort (me, "no port method"); |
| 68 | } |
| 69 | |
| 70 | void |
| 71 | create_hw_port_data (struct hw *me) |
| 72 | { |
| 73 | me->ports_of_hw = HW_ZALLOC (me, struct hw_port_data); |
| 74 | set_hw_port_event (me, panic_hw_port_event); |
| 75 | set_hw_ports (me, empty_hw_ports); |
| 76 | } |
| 77 | |
| 78 | void |
| 79 | delete_hw_port_data (struct hw *me) |
| 80 | { |
| 81 | hw_free (me, me->ports_of_hw); |
| 82 | me->ports_of_hw = NULL; |
| 83 | } |
| 84 | |
| 85 | void |
| 86 | set_hw_ports (struct hw *me, |
| 87 | const struct hw_port_descriptor ports[]) |
| 88 | { |
| 89 | me->ports_of_hw->ports = ports; |
| 90 | } |
| 91 | |
| 92 | void |
| 93 | set_hw_port_event (struct hw *me, |
| 94 | hw_port_event_method *port_event) |
| 95 | { |
| 96 | me->ports_of_hw->to_port_event = port_event; |
| 97 | } |
| 98 | |
| 99 | |
| 100 | static void |
| 101 | attach_hw_port_edge (struct hw *me, |
| 102 | struct hw_port_edge **list, |
| 103 | int my_port, |
| 104 | struct hw *dest, |
| 105 | int dest_port, |
| 106 | object_disposition disposition) |
| 107 | { |
| 108 | struct hw_port_edge *new_edge = HW_ZALLOC (me, struct hw_port_edge); |
| 109 | new_edge->my_port = my_port; |
| 110 | new_edge->dest = dest; |
| 111 | new_edge->dest_port = dest_port; |
| 112 | new_edge->next = *list; |
| 113 | new_edge->disposition = disposition; |
| 114 | *list = new_edge; |
| 115 | } |
| 116 | |
| 117 | |
| 118 | static void |
| 119 | detach_hw_port_edge (struct hw *me, |
| 120 | struct hw_port_edge **list, |
| 121 | int my_port, |
| 122 | struct hw *dest, |
| 123 | int dest_port) |
| 124 | { |
| 125 | while (*list != NULL) |
| 126 | { |
| 127 | struct hw_port_edge *old_edge = *list; |
| 128 | if (old_edge->dest == dest |
| 129 | && old_edge->dest_port == dest_port |
| 130 | && old_edge->my_port == my_port) |
| 131 | { |
| 132 | if (old_edge->disposition == permenant_object) |
| 133 | hw_abort (me, "attempt to delete permenant port edge"); |
| 134 | *list = old_edge->next; |
| 135 | hw_free (me, old_edge); |
| 136 | return; |
| 137 | } |
| 138 | } |
| 139 | hw_abort (me, "attempt to delete unattached port"); |
| 140 | } |
| 141 | |
| 142 | |
| 143 | #if 0 |
| 144 | static void |
| 145 | clean_hw_port_edges (struct hw_port_edge **list) |
| 146 | { |
| 147 | while (*list != NULL) |
| 148 | { |
| 149 | struct hw_port_edge *old_edge = *list; |
| 150 | switch (old_edge->disposition) |
| 151 | { |
| 152 | case permenant_object: |
| 153 | list = &old_edge->next; |
| 154 | break; |
| 155 | case temporary_object: |
| 156 | *list = old_edge->next; |
| 157 | hw_free (me, old_edge); |
| 158 | break; |
| 159 | } |
| 160 | } |
| 161 | } |
| 162 | #endif |
| 163 | |
| 164 | |
| 165 | /* Ports: */ |
| 166 | |
| 167 | void |
| 168 | hw_port_event (struct hw *me, |
| 169 | int my_port, |
| 170 | int level) |
| 171 | { |
| 172 | int found_an_edge = 0; |
| 173 | struct hw_port_edge *edge; |
| 174 | /* device's lines directly connected */ |
| 175 | for (edge = me->ports_of_hw->edges; |
| 176 | edge != NULL; |
| 177 | edge = edge->next) |
| 178 | { |
| 179 | if (edge->my_port == my_port) |
| 180 | { |
| 181 | edge->dest->ports_of_hw->to_port_event (edge->dest, |
| 182 | edge->dest_port, |
| 183 | me, |
| 184 | my_port, |
| 185 | level); |
| 186 | found_an_edge = 1; |
| 187 | } |
| 188 | } |
| 189 | if (!found_an_edge) |
| 190 | hw_abort (me, "No edge for port %d", my_port); |
| 191 | } |
| 192 | |
| 193 | |
| 194 | void |
| 195 | hw_port_attach (struct hw *me, |
| 196 | int my_port, |
| 197 | struct hw *dest, |
| 198 | int dest_port, |
| 199 | object_disposition disposition) |
| 200 | { |
| 201 | attach_hw_port_edge (me, |
| 202 | &me->ports_of_hw->edges, |
| 203 | my_port, |
| 204 | dest, |
| 205 | dest_port, |
| 206 | disposition); |
| 207 | } |
| 208 | |
| 209 | |
| 210 | void |
| 211 | hw_port_detach (struct hw *me, |
| 212 | int my_port, |
| 213 | struct hw *dest, |
| 214 | int dest_port) |
| 215 | { |
| 216 | detach_hw_port_edge (me, |
| 217 | &me->ports_of_hw->edges, |
| 218 | my_port, |
| 219 | dest, |
| 220 | dest_port); |
| 221 | } |
| 222 | |
| 223 | |
| 224 | void |
| 225 | hw_port_traverse (struct hw *me, |
| 226 | hw_port_traverse_function *handler, |
| 227 | void *data) |
| 228 | { |
| 229 | struct hw_port_edge *port_edge; |
| 230 | for (port_edge = me->ports_of_hw->edges; |
| 231 | port_edge != NULL; |
| 232 | port_edge = port_edge->next) |
| 233 | { |
| 234 | handler (me, port_edge->my_port, |
| 235 | port_edge->dest, port_edge->dest_port, |
| 236 | data); |
| 237 | } |
| 238 | } |
| 239 | |
| 240 | |
| 241 | int |
| 242 | hw_port_decode (struct hw *me, |
| 243 | const char *port_name, |
| 244 | port_direction direction) |
| 245 | { |
| 246 | if (port_name == NULL || port_name[0] == '\0') |
| 247 | return 0; |
| 248 | if (isdigit(port_name[0])) |
| 249 | { |
| 250 | return strtoul (port_name, NULL, 0); |
| 251 | } |
| 252 | else |
| 253 | { |
| 254 | const struct hw_port_descriptor *ports = |
| 255 | me->ports_of_hw->ports; |
| 256 | if (ports != NULL) |
| 257 | { |
| 258 | while (ports->name != NULL) |
| 259 | { |
| 260 | if (ports->direction == bidirect_port |
| 261 | || ports->direction == direction) |
| 262 | { |
| 263 | if (ports->nr_ports > 0) |
| 264 | { |
| 265 | int len = strlen (ports->name); |
| 266 | if (strncmp (port_name, ports->name, len) == 0) |
| 267 | { |
| 268 | if (port_name[len] == '\0') |
| 269 | return ports->number; |
| 270 | else if(isdigit (port_name[len])) |
| 271 | { |
| 272 | int port = (ports->number |
| 273 | + strtoul (&port_name[len], NULL, 0)); |
| 274 | if (port >= ports->number + ports->nr_ports) |
| 275 | hw_abort (me, |
| 276 | "Port %s out of range", |
| 277 | port_name); |
| 278 | return port; |
| 279 | } |
| 280 | } |
| 281 | } |
| 282 | else if (strcmp (port_name, ports->name) == 0) |
| 283 | return ports->number; |
| 284 | } |
| 285 | ports++; |
| 286 | } |
| 287 | } |
| 288 | } |
| 289 | hw_abort (me, "Unreconized port %s", port_name); |
| 290 | return 0; |
| 291 | } |
| 292 | |
| 293 | |
| 294 | int |
| 295 | hw_port_encode (struct hw *me, |
| 296 | int port_number, |
| 297 | char *buf, |
| 298 | int sizeof_buf, |
| 299 | port_direction direction) |
| 300 | { |
| 301 | const struct hw_port_descriptor *ports = NULL; |
| 302 | ports = me->ports_of_hw->ports; |
| 303 | if (ports != NULL) { |
| 304 | while (ports->name != NULL) |
| 305 | { |
| 306 | if (ports->direction == bidirect_port |
| 307 | || ports->direction == direction) |
| 308 | { |
| 309 | if (ports->nr_ports > 0) |
| 310 | { |
| 311 | if (port_number >= ports->number |
| 312 | && port_number < ports->number + ports->nr_ports) |
| 313 | { |
| 314 | strcpy (buf, ports->name); |
| 315 | sprintf (buf + strlen(buf), "%d", port_number - ports->number); |
| 316 | if (strlen (buf) >= sizeof_buf) |
| 317 | hw_abort (me, "hw_port_encode: buffer overflow"); |
| 318 | return strlen (buf); |
| 319 | } |
| 320 | } |
| 321 | else |
| 322 | { |
| 323 | if (ports->number == port_number) |
| 324 | { |
| 325 | if (strlen(ports->name) >= sizeof_buf) |
| 326 | hw_abort (me, "hw_port_encode: buffer overflow"); |
| 327 | strcpy(buf, ports->name); |
| 328 | return strlen(buf); |
| 329 | } |
| 330 | } |
| 331 | } |
| 332 | ports++; |
| 333 | } |
| 334 | } |
| 335 | sprintf (buf, "%d", port_number); |
| 336 | if (strlen(buf) >= sizeof_buf) |
| 337 | hw_abort (me, "hw_port_encode: buffer overflow"); |
| 338 | return strlen(buf); |
| 339 | } |