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c906108c | 1 | /* Hardware ports. |
9b254dd1 | 2 | Copyright (C) 1998, 2007, 2008 Free Software Foundation, Inc. |
c906108c SS |
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 | |
4744ac1b JB |
9 | the Free Software Foundation; either version 3 of the License, or |
10 | (at your option) any later version. | |
c906108c SS |
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 | ||
4744ac1b JB |
17 | You should have received a copy of the GNU General Public License |
18 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ | |
c906108c SS |
19 | |
20 | ||
21 | #include "hw-main.h" | |
22 | #include "hw-base.h" | |
23 | ||
24 | #ifdef HAVE_STDLIB_H | |
25 | #include <stdlib.h> | |
26 | #endif | |
27 | ||
28 | #ifdef HAVE_STRING_H | |
29 | #include <string.h> | |
30 | #else | |
31 | #ifdef HAVE_STRINGS_H | |
32 | #include <strings.h> | |
33 | #endif | |
34 | #endif | |
35 | ||
36 | #include <ctype.h> | |
37 | ||
38 | #define TRACE(x,y) | |
39 | ||
40 | ||
41 | struct hw_port_edge { | |
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 | hw_port_event_method *to_port_event; | |
51 | const struct hw_port_descriptor *ports; | |
52 | struct hw_port_edge *edges; | |
53 | }; | |
54 | ||
55 | const struct hw_port_descriptor empty_hw_ports[] = { | |
56 | { NULL, }, | |
57 | }; | |
58 | ||
59 | static void | |
60 | panic_hw_port_event (struct hw *me, | |
61 | int my_port, | |
62 | struct hw *source, | |
63 | int source_port, | |
64 | int level) | |
65 | { | |
66 | hw_abort (me, "no port method"); | |
67 | } | |
68 | ||
69 | void | |
70 | create_hw_port_data (struct hw *me) | |
71 | { | |
72 | me->ports_of_hw = HW_ZALLOC (me, struct hw_port_data); | |
73 | set_hw_port_event (me, panic_hw_port_event); | |
74 | set_hw_ports (me, empty_hw_ports); | |
75 | } | |
76 | ||
77 | void | |
78 | delete_hw_port_data (struct hw *me) | |
79 | { | |
80 | hw_free (me, me->ports_of_hw); | |
81 | me->ports_of_hw = NULL; | |
82 | } | |
83 | ||
84 | void | |
85 | set_hw_ports (struct hw *me, | |
86 | const struct hw_port_descriptor ports[]) | |
87 | { | |
88 | me->ports_of_hw->ports = ports; | |
89 | } | |
90 | ||
91 | void | |
92 | set_hw_port_event (struct hw *me, | |
93 | hw_port_event_method *port_event) | |
94 | { | |
95 | me->ports_of_hw->to_port_event = port_event; | |
96 | } | |
97 | ||
98 | ||
99 | static void | |
100 | attach_hw_port_edge (struct hw *me, | |
101 | struct hw_port_edge **list, | |
102 | int my_port, | |
103 | struct hw *dest, | |
104 | int dest_port, | |
105 | object_disposition disposition) | |
106 | { | |
107 | struct hw_port_edge *new_edge = HW_ZALLOC (me, struct hw_port_edge); | |
108 | new_edge->my_port = my_port; | |
109 | new_edge->dest = dest; | |
110 | new_edge->dest_port = dest_port; | |
111 | new_edge->next = *list; | |
112 | new_edge->disposition = disposition; | |
113 | *list = new_edge; | |
114 | } | |
115 | ||
116 | ||
117 | static void | |
118 | detach_hw_port_edge (struct hw *me, | |
119 | struct hw_port_edge **list, | |
120 | int my_port, | |
121 | struct hw *dest, | |
122 | int dest_port) | |
123 | { | |
124 | while (*list != NULL) | |
125 | { | |
126 | struct hw_port_edge *old_edge = *list; | |
127 | if (old_edge->dest == dest | |
128 | && old_edge->dest_port == dest_port | |
129 | && old_edge->my_port == my_port) | |
130 | { | |
131 | if (old_edge->disposition == permenant_object) | |
132 | hw_abort (me, "attempt to delete permenant port edge"); | |
133 | *list = old_edge->next; | |
134 | hw_free (me, old_edge); | |
135 | return; | |
136 | } | |
137 | } | |
138 | hw_abort (me, "attempt to delete unattached port"); | |
139 | } | |
140 | ||
141 | ||
142 | #if 0 | |
143 | static void | |
144 | clean_hw_port_edges (struct hw_port_edge **list) | |
145 | { | |
146 | while (*list != NULL) | |
147 | { | |
148 | struct hw_port_edge *old_edge = *list; | |
149 | switch (old_edge->disposition) | |
150 | { | |
151 | case permenant_object: | |
152 | list = &old_edge->next; | |
153 | break; | |
154 | case temporary_object: | |
155 | *list = old_edge->next; | |
156 | hw_free (me, old_edge); | |
157 | break; | |
158 | } | |
159 | } | |
160 | } | |
161 | #endif | |
162 | ||
163 | ||
164 | /* Ports: */ | |
165 | ||
166 | void | |
167 | hw_port_event (struct hw *me, | |
168 | int my_port, | |
169 | int level) | |
170 | { | |
171 | int found_an_edge = 0; | |
172 | struct hw_port_edge *edge; | |
173 | /* device's lines directly connected */ | |
174 | for (edge = me->ports_of_hw->edges; | |
175 | edge != NULL; | |
176 | edge = edge->next) | |
177 | { | |
178 | if (edge->my_port == my_port) | |
179 | { | |
180 | edge->dest->ports_of_hw->to_port_event (edge->dest, | |
181 | edge->dest_port, | |
182 | me, | |
183 | my_port, | |
184 | level); | |
185 | found_an_edge = 1; | |
186 | } | |
187 | } | |
188 | if (!found_an_edge) | |
189 | hw_abort (me, "No edge for port %d", my_port); | |
190 | } | |
191 | ||
192 | ||
193 | void | |
194 | hw_port_attach (struct hw *me, | |
195 | int my_port, | |
196 | struct hw *dest, | |
197 | int dest_port, | |
198 | object_disposition disposition) | |
199 | { | |
200 | attach_hw_port_edge (me, | |
201 | &me->ports_of_hw->edges, | |
202 | my_port, | |
203 | dest, | |
204 | dest_port, | |
205 | disposition); | |
206 | } | |
207 | ||
208 | ||
209 | void | |
210 | hw_port_detach (struct hw *me, | |
211 | int my_port, | |
212 | struct hw *dest, | |
213 | int dest_port) | |
214 | { | |
215 | detach_hw_port_edge (me, | |
216 | &me->ports_of_hw->edges, | |
217 | my_port, | |
218 | dest, | |
219 | dest_port); | |
220 | } | |
221 | ||
222 | ||
223 | void | |
224 | hw_port_traverse (struct hw *me, | |
225 | hw_port_traverse_function *handler, | |
226 | void *data) | |
227 | { | |
228 | struct hw_port_edge *port_edge; | |
229 | for (port_edge = me->ports_of_hw->edges; | |
230 | port_edge != NULL; | |
231 | port_edge = port_edge->next) | |
232 | { | |
233 | handler (me, port_edge->my_port, | |
234 | port_edge->dest, port_edge->dest_port, | |
235 | data); | |
236 | } | |
237 | } | |
238 | ||
239 | ||
240 | int | |
241 | hw_port_decode (struct hw *me, | |
242 | const char *port_name, | |
243 | port_direction direction) | |
244 | { | |
245 | if (port_name == NULL || port_name[0] == '\0') | |
246 | return 0; | |
247 | if (isdigit(port_name[0])) | |
248 | { | |
249 | return strtoul (port_name, NULL, 0); | |
250 | } | |
251 | else | |
252 | { | |
253 | const struct hw_port_descriptor *ports = | |
254 | me->ports_of_hw->ports; | |
255 | if (ports != NULL) | |
256 | { | |
257 | while (ports->name != NULL) | |
258 | { | |
259 | if (ports->direction == bidirect_port | |
260 | || ports->direction == direction) | |
261 | { | |
262 | if (ports->nr_ports > 0) | |
263 | { | |
264 | int len = strlen (ports->name); | |
265 | if (strncmp (port_name, ports->name, len) == 0) | |
266 | { | |
267 | if (port_name[len] == '\0') | |
268 | return ports->number; | |
269 | else if(isdigit (port_name[len])) | |
270 | { | |
271 | int port = (ports->number | |
272 | + strtoul (&port_name[len], NULL, 0)); | |
273 | if (port >= ports->number + ports->nr_ports) | |
274 | hw_abort (me, | |
275 | "Port %s out of range", | |
276 | port_name); | |
277 | return port; | |
278 | } | |
279 | } | |
280 | } | |
281 | else if (strcmp (port_name, ports->name) == 0) | |
282 | return ports->number; | |
283 | } | |
284 | ports++; | |
285 | } | |
286 | } | |
287 | } | |
288 | hw_abort (me, "Unreconized port %s", port_name); | |
289 | return 0; | |
290 | } | |
291 | ||
292 | ||
293 | int | |
294 | hw_port_encode (struct hw *me, | |
295 | int port_number, | |
296 | char *buf, | |
297 | int sizeof_buf, | |
298 | port_direction direction) | |
299 | { | |
300 | const struct hw_port_descriptor *ports = NULL; | |
301 | ports = me->ports_of_hw->ports; | |
302 | if (ports != NULL) { | |
303 | while (ports->name != NULL) | |
304 | { | |
305 | if (ports->direction == bidirect_port | |
306 | || ports->direction == direction) | |
307 | { | |
308 | if (ports->nr_ports > 0) | |
309 | { | |
310 | if (port_number >= ports->number | |
311 | && port_number < ports->number + ports->nr_ports) | |
312 | { | |
313 | strcpy (buf, ports->name); | |
314 | sprintf (buf + strlen(buf), "%d", port_number - ports->number); | |
315 | if (strlen (buf) >= sizeof_buf) | |
316 | hw_abort (me, "hw_port_encode: buffer overflow"); | |
317 | return strlen (buf); | |
318 | } | |
319 | } | |
320 | else | |
321 | { | |
322 | if (ports->number == port_number) | |
323 | { | |
324 | if (strlen(ports->name) >= sizeof_buf) | |
325 | hw_abort (me, "hw_port_encode: buffer overflow"); | |
326 | strcpy(buf, ports->name); | |
327 | return strlen(buf); | |
328 | } | |
329 | } | |
330 | } | |
331 | ports++; | |
332 | } | |
333 | } | |
334 | sprintf (buf, "%d", port_number); | |
335 | if (strlen(buf) >= sizeof_buf) | |
336 | hw_abort (me, "hw_port_encode: buffer overflow"); | |
337 | return strlen(buf); | |
338 | } |