Commit | Line | Data |
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c906108c | 1 | /* Hardware ports. |
88b9d363 | 2 | Copyright (C) 1998-2022 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 | 19 | |
6df01ab8 MF |
20 | /* This must come before any other includes. */ |
21 | #include "defs.h" | |
c906108c SS |
22 | |
23 | #include "hw-main.h" | |
24 | #include "hw-base.h" | |
25 | ||
c906108c | 26 | #include <stdlib.h> |
c906108c | 27 | #include <string.h> |
c906108c SS |
28 | #include <ctype.h> |
29 | ||
c906108c | 30 | |
12c4cbd5 MF |
31 | struct hw_port_edge |
32 | { | |
c906108c SS |
33 | int my_port; |
34 | struct hw *dest; | |
35 | int dest_port; | |
36 | struct hw_port_edge *next; | |
37 | object_disposition disposition; | |
38 | }; | |
39 | ||
12c4cbd5 MF |
40 | struct hw_port_data |
41 | { | |
c906108c SS |
42 | hw_port_event_method *to_port_event; |
43 | const struct hw_port_descriptor *ports; | |
44 | struct hw_port_edge *edges; | |
45 | }; | |
46 | ||
12c4cbd5 MF |
47 | const struct hw_port_descriptor empty_hw_ports[] = |
48 | { | |
21cf617c | 49 | { NULL, 0, 0, 0 }, |
c906108c SS |
50 | }; |
51 | ||
52 | static void | |
53 | panic_hw_port_event (struct hw *me, | |
54 | int my_port, | |
55 | struct hw *source, | |
56 | int source_port, | |
57 | int level) | |
58 | { | |
59 | hw_abort (me, "no port method"); | |
60 | } | |
61 | ||
62 | void | |
63 | create_hw_port_data (struct hw *me) | |
64 | { | |
65 | me->ports_of_hw = HW_ZALLOC (me, struct hw_port_data); | |
66 | set_hw_port_event (me, panic_hw_port_event); | |
67 | set_hw_ports (me, empty_hw_ports); | |
68 | } | |
69 | ||
70 | void | |
71 | delete_hw_port_data (struct hw *me) | |
72 | { | |
73 | hw_free (me, me->ports_of_hw); | |
74 | me->ports_of_hw = NULL; | |
75 | } | |
76 | ||
77 | void | |
78 | set_hw_ports (struct hw *me, | |
79 | const struct hw_port_descriptor ports[]) | |
80 | { | |
81 | me->ports_of_hw->ports = ports; | |
82 | } | |
83 | ||
84 | void | |
85 | set_hw_port_event (struct hw *me, | |
86 | hw_port_event_method *port_event) | |
87 | { | |
88 | me->ports_of_hw->to_port_event = port_event; | |
89 | } | |
90 | ||
91 | ||
92 | static void | |
93 | attach_hw_port_edge (struct hw *me, | |
94 | struct hw_port_edge **list, | |
95 | int my_port, | |
96 | struct hw *dest, | |
97 | int dest_port, | |
98 | object_disposition disposition) | |
99 | { | |
100 | struct hw_port_edge *new_edge = HW_ZALLOC (me, struct hw_port_edge); | |
101 | new_edge->my_port = my_port; | |
102 | new_edge->dest = dest; | |
103 | new_edge->dest_port = dest_port; | |
104 | new_edge->next = *list; | |
105 | new_edge->disposition = disposition; | |
106 | *list = new_edge; | |
107 | } | |
108 | ||
109 | ||
110 | static void | |
111 | detach_hw_port_edge (struct hw *me, | |
112 | struct hw_port_edge **list, | |
113 | int my_port, | |
114 | struct hw *dest, | |
115 | int dest_port) | |
116 | { | |
117 | while (*list != NULL) | |
118 | { | |
119 | struct hw_port_edge *old_edge = *list; | |
120 | if (old_edge->dest == dest | |
121 | && old_edge->dest_port == dest_port | |
122 | && old_edge->my_port == my_port) | |
123 | { | |
124 | if (old_edge->disposition == permenant_object) | |
125 | hw_abort (me, "attempt to delete permenant port edge"); | |
126 | *list = old_edge->next; | |
127 | hw_free (me, old_edge); | |
128 | return; | |
129 | } | |
130 | } | |
131 | hw_abort (me, "attempt to delete unattached port"); | |
132 | } | |
133 | ||
134 | ||
135 | #if 0 | |
136 | static void | |
137 | clean_hw_port_edges (struct hw_port_edge **list) | |
138 | { | |
139 | while (*list != NULL) | |
140 | { | |
141 | struct hw_port_edge *old_edge = *list; | |
142 | switch (old_edge->disposition) | |
143 | { | |
144 | case permenant_object: | |
145 | list = &old_edge->next; | |
146 | break; | |
147 | case temporary_object: | |
148 | *list = old_edge->next; | |
149 | hw_free (me, old_edge); | |
150 | break; | |
151 | } | |
152 | } | |
153 | } | |
154 | #endif | |
155 | ||
156 | ||
157 | /* Ports: */ | |
158 | ||
159 | void | |
160 | hw_port_event (struct hw *me, | |
161 | int my_port, | |
162 | int level) | |
163 | { | |
164 | int found_an_edge = 0; | |
165 | struct hw_port_edge *edge; | |
166 | /* device's lines directly connected */ | |
167 | for (edge = me->ports_of_hw->edges; | |
168 | edge != NULL; | |
169 | edge = edge->next) | |
170 | { | |
171 | if (edge->my_port == my_port) | |
172 | { | |
173 | edge->dest->ports_of_hw->to_port_event (edge->dest, | |
174 | edge->dest_port, | |
175 | me, | |
176 | my_port, | |
177 | level); | |
178 | found_an_edge = 1; | |
179 | } | |
180 | } | |
181 | if (!found_an_edge) | |
182 | hw_abort (me, "No edge for port %d", my_port); | |
183 | } | |
184 | ||
185 | ||
186 | void | |
187 | hw_port_attach (struct hw *me, | |
188 | int my_port, | |
189 | struct hw *dest, | |
190 | int dest_port, | |
191 | object_disposition disposition) | |
192 | { | |
193 | attach_hw_port_edge (me, | |
194 | &me->ports_of_hw->edges, | |
195 | my_port, | |
196 | dest, | |
197 | dest_port, | |
198 | disposition); | |
199 | } | |
200 | ||
201 | ||
202 | void | |
203 | hw_port_detach (struct hw *me, | |
204 | int my_port, | |
205 | struct hw *dest, | |
206 | int dest_port) | |
207 | { | |
208 | detach_hw_port_edge (me, | |
209 | &me->ports_of_hw->edges, | |
210 | my_port, | |
211 | dest, | |
212 | dest_port); | |
213 | } | |
214 | ||
215 | ||
216 | void | |
217 | hw_port_traverse (struct hw *me, | |
218 | hw_port_traverse_function *handler, | |
219 | void *data) | |
220 | { | |
221 | struct hw_port_edge *port_edge; | |
222 | for (port_edge = me->ports_of_hw->edges; | |
223 | port_edge != NULL; | |
224 | port_edge = port_edge->next) | |
225 | { | |
226 | handler (me, port_edge->my_port, | |
227 | port_edge->dest, port_edge->dest_port, | |
228 | data); | |
229 | } | |
230 | } | |
231 | ||
232 | ||
233 | int | |
234 | hw_port_decode (struct hw *me, | |
235 | const char *port_name, | |
236 | port_direction direction) | |
237 | { | |
238 | if (port_name == NULL || port_name[0] == '\0') | |
239 | return 0; | |
34b47c38 | 240 | if (isdigit (port_name[0])) |
c906108c SS |
241 | { |
242 | return strtoul (port_name, NULL, 0); | |
243 | } | |
244 | else | |
245 | { | |
246 | const struct hw_port_descriptor *ports = | |
247 | me->ports_of_hw->ports; | |
028f6515 | 248 | if (ports != NULL) |
c906108c SS |
249 | { |
250 | while (ports->name != NULL) | |
251 | { | |
252 | if (ports->direction == bidirect_port | |
253 | || ports->direction == direction) | |
254 | { | |
255 | if (ports->nr_ports > 0) | |
256 | { | |
257 | int len = strlen (ports->name); | |
258 | if (strncmp (port_name, ports->name, len) == 0) | |
259 | { | |
260 | if (port_name[len] == '\0') | |
261 | return ports->number; | |
34b47c38 | 262 | else if (isdigit (port_name[len])) |
c906108c SS |
263 | { |
264 | int port = (ports->number | |
265 | + strtoul (&port_name[len], NULL, 0)); | |
266 | if (port >= ports->number + ports->nr_ports) | |
267 | hw_abort (me, | |
268 | "Port %s out of range", | |
269 | port_name); | |
270 | return port; | |
271 | } | |
272 | } | |
273 | } | |
274 | else if (strcmp (port_name, ports->name) == 0) | |
275 | return ports->number; | |
276 | } | |
277 | ports++; | |
278 | } | |
279 | } | |
280 | } | |
ffbc20d9 | 281 | hw_abort (me, "Unrecognized port %s", port_name); |
c906108c SS |
282 | return 0; |
283 | } | |
284 | ||
285 | ||
286 | int | |
287 | hw_port_encode (struct hw *me, | |
288 | int port_number, | |
289 | char *buf, | |
290 | int sizeof_buf, | |
291 | port_direction direction) | |
292 | { | |
293 | const struct hw_port_descriptor *ports = NULL; | |
294 | ports = me->ports_of_hw->ports; | |
295 | if (ports != NULL) { | |
296 | while (ports->name != NULL) | |
297 | { | |
298 | if (ports->direction == bidirect_port | |
299 | || ports->direction == direction) | |
300 | { | |
301 | if (ports->nr_ports > 0) | |
302 | { | |
303 | if (port_number >= ports->number | |
304 | && port_number < ports->number + ports->nr_ports) | |
305 | { | |
306 | strcpy (buf, ports->name); | |
34b47c38 | 307 | sprintf (buf + strlen (buf), "%d", port_number - ports->number); |
c906108c SS |
308 | if (strlen (buf) >= sizeof_buf) |
309 | hw_abort (me, "hw_port_encode: buffer overflow"); | |
310 | return strlen (buf); | |
311 | } | |
312 | } | |
313 | else | |
314 | { | |
315 | if (ports->number == port_number) | |
316 | { | |
34b47c38 | 317 | if (strlen (ports->name) >= sizeof_buf) |
c906108c | 318 | hw_abort (me, "hw_port_encode: buffer overflow"); |
34b47c38 MF |
319 | strcpy (buf, ports->name); |
320 | return strlen (buf); | |
c906108c SS |
321 | } |
322 | } | |
323 | } | |
324 | ports++; | |
325 | } | |
326 | } | |
327 | sprintf (buf, "%d", port_number); | |
34b47c38 | 328 | if (strlen (buf) >= sizeof_buf) |
c906108c | 329 | hw_abort (me, "hw_port_encode: buffer overflow"); |
34b47c38 | 330 | return strlen (buf); |
c906108c | 331 | } |