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39e953a7 | 1 | /* Hardware ports. |
2f06c437 AC |
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 "sim-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_callback *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_callback *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 | } |