Commit | Line | Data |
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c906108c SS |
1 | /* Target communications support for Macraigor Systems' On-Chip Debugging |
2 | Copyright 1996, 1997 Free Software Foundation, Inc. | |
3 | ||
c5aa993b | 4 | This file is part of GDB. |
c906108c | 5 | |
c5aa993b JM |
6 | This program is free software; you can redistribute it and/or modify |
7 | it under the terms of the GNU General Public License as published by | |
8 | the Free Software Foundation; either version 2 of the License, or | |
9 | (at your option) any later version. | |
c906108c | 10 | |
c5aa993b JM |
11 | This program is distributed in the hope that it will be useful, |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
c906108c | 15 | |
c5aa993b JM |
16 | You should have received a copy of the GNU General Public License |
17 | along with this program; if not, write to the Free Software | |
18 | Foundation, Inc., 59 Temple Place - Suite 330, | |
19 | Boston, MA 02111-1307, USA. */ | |
c906108c SS |
20 | |
21 | #include "defs.h" | |
22 | #include "gdbcore.h" | |
23 | #include "gdb_string.h" | |
24 | #include <fcntl.h> | |
25 | #include "frame.h" | |
26 | #include "inferior.h" | |
27 | #include "bfd.h" | |
28 | #include "symfile.h" | |
29 | #include "target.h" | |
03f2053f | 30 | #include "gdb_wait.h" |
c906108c SS |
31 | #include "gdbcmd.h" |
32 | #include "objfiles.h" | |
33 | #include "gdb-stabs.h" | |
34 | #include "dcache.h" | |
35 | #include <sys/types.h> | |
36 | #include <signal.h> | |
37 | #include "serial.h" | |
38 | #include "ocd.h" | |
39 | ||
40 | /* Prototypes for local functions */ | |
41 | ||
42 | static int ocd_read_bytes PARAMS ((CORE_ADDR memaddr, | |
c5aa993b | 43 | char *myaddr, int len)); |
c906108c SS |
44 | |
45 | static int ocd_start_remote PARAMS ((PTR dummy)); | |
46 | ||
47 | static int readchar PARAMS ((int timeout)); | |
48 | ||
49 | static void reset_packet PARAMS ((void)); | |
50 | ||
51 | static void output_packet PARAMS ((void)); | |
52 | ||
53 | static int get_quoted_char PARAMS ((int timeout)); | |
54 | ||
55 | static void put_quoted_char PARAMS ((int c)); | |
56 | ||
57 | static void ocd_interrupt PARAMS ((int signo)); | |
58 | ||
59 | static void ocd_interrupt_twice PARAMS ((int signo)); | |
60 | ||
61 | static void interrupt_query PARAMS ((void)); | |
62 | ||
c5aa993b | 63 | static unsigned char *ocd_do_command PARAMS ((int cmd, int *statusp, int *lenp)); |
c906108c SS |
64 | |
65 | static void ocd_put_packet PARAMS ((unsigned char *packet, int pktlen)); | |
66 | ||
c5aa993b | 67 | static unsigned char *ocd_get_packet PARAMS ((int cmd, int *pktlen, int timeout)); |
c906108c SS |
68 | |
69 | static struct target_ops *current_ops = NULL; | |
70 | ||
71 | static int last_run_status; | |
72 | ||
73 | /* This was 5 seconds, which is a long time to sit and wait. | |
74 | Unless this is going though some terminal server or multiplexer or | |
75 | other form of hairy serial connection, I would think 2 seconds would | |
76 | be plenty. */ | |
77 | ||
78 | #if 0 | |
79 | /* FIXME: Change to allow option to set timeout value on a per target | |
80 | basis. */ | |
81 | static int remote_timeout = 2; | |
82 | #endif | |
83 | ||
84 | /* Descriptor for I/O to remote machine. Initialize it to NULL so that | |
85 | ocd_open knows that we don't have a file open when the program | |
86 | starts. */ | |
87 | static serial_t ocd_desc = NULL; | |
88 | \f | |
89 | void | |
90 | ocd_error (s, error_code) | |
91 | char *s; | |
92 | int error_code; | |
93 | { | |
94 | char buf[100]; | |
95 | ||
96 | fputs_filtered (s, gdb_stderr); | |
97 | fputs_filtered (" ", gdb_stderr); | |
98 | ||
99 | switch (error_code) | |
100 | { | |
c5aa993b JM |
101 | case 0x1: |
102 | s = "Unknown fault"; | |
103 | break; | |
104 | case 0x2: | |
105 | s = "Power failed"; | |
106 | break; | |
107 | case 0x3: | |
108 | s = "Cable disconnected"; | |
109 | break; | |
110 | case 0x4: | |
111 | s = "Couldn't enter OCD mode"; | |
112 | break; | |
113 | case 0x5: | |
114 | s = "Target stuck in reset"; | |
115 | break; | |
116 | case 0x6: | |
117 | s = "OCD hasn't been initialized"; | |
118 | break; | |
119 | case 0x7: | |
120 | s = "Write verify failed"; | |
121 | break; | |
122 | case 0x8: | |
123 | s = "Reg buff error (during MPC5xx fp reg read/write)"; | |
124 | break; | |
125 | case 0x9: | |
126 | s = "Invalid CPU register access attempt failed"; | |
127 | break; | |
128 | case 0x11: | |
129 | s = "Bus error"; | |
130 | break; | |
131 | case 0x12: | |
132 | s = "Checksum error"; | |
133 | break; | |
134 | case 0x13: | |
135 | s = "Illegal command"; | |
136 | break; | |
137 | case 0x14: | |
138 | s = "Parameter error"; | |
139 | break; | |
140 | case 0x15: | |
141 | s = "Internal error"; | |
142 | break; | |
143 | case 0x80: | |
144 | s = "Flash erase error"; | |
145 | break; | |
c906108c SS |
146 | default: |
147 | sprintf (buf, "Unknown error code %d", error_code); | |
148 | s = buf; | |
149 | } | |
150 | ||
151 | error (s); | |
152 | } | |
153 | ||
154 | /* Return nonzero if the thread TH is still alive on the remote system. */ | |
155 | ||
156 | int | |
157 | ocd_thread_alive (th) | |
158 | int th; | |
159 | { | |
160 | return 1; | |
161 | } | |
162 | \f | |
163 | /* Clean up connection to a remote debugger. */ | |
164 | ||
165 | /* ARGSUSED */ | |
166 | void | |
167 | ocd_close (quitting) | |
168 | int quitting; | |
169 | { | |
170 | if (ocd_desc) | |
171 | SERIAL_CLOSE (ocd_desc); | |
172 | ocd_desc = NULL; | |
173 | } | |
174 | ||
175 | /* Stub for catch_errors. */ | |
176 | ||
177 | static int | |
178 | ocd_start_remote (dummy) | |
179 | PTR dummy; | |
180 | { | |
181 | unsigned char buf[10], *p; | |
182 | int pktlen; | |
183 | int status; | |
184 | int error_code; | |
185 | int speed; | |
186 | enum ocd_target_type target_type; | |
187 | ||
c5aa993b | 188 | target_type = *(enum ocd_target_type *) dummy; |
c906108c SS |
189 | |
190 | immediate_quit = 1; /* Allow user to interrupt it */ | |
191 | ||
c5aa993b | 192 | SERIAL_SEND_BREAK (ocd_desc); /* Wake up the wiggler */ |
c906108c SS |
193 | |
194 | speed = 80; /* Divide clock by 4000 */ | |
195 | ||
196 | buf[0] = OCD_INIT; | |
197 | buf[1] = speed >> 8; | |
198 | buf[2] = speed & 0xff; | |
199 | buf[3] = target_type; | |
200 | ocd_put_packet (buf, 4); /* Init OCD params */ | |
201 | p = ocd_get_packet (buf[0], &pktlen, remote_timeout); | |
202 | ||
203 | if (pktlen < 2) | |
204 | error ("Truncated response packet from OCD device"); | |
205 | ||
206 | status = p[1]; | |
207 | error_code = p[2]; | |
208 | ||
209 | if (error_code != 0) | |
210 | ocd_error ("OCD_INIT:", error_code); | |
211 | ||
212 | ocd_do_command (OCD_AYT, &status, &pktlen); | |
213 | ||
214 | p = ocd_do_command (OCD_GET_VERSION, &status, &pktlen); | |
215 | ||
216 | printf_unfiltered ("[Wiggler version %x.%x, capability 0x%x]\n", | |
217 | p[0], p[1], (p[2] << 16) | p[3]); | |
218 | ||
219 | #if 0 | |
220 | /* Reset the target */ | |
221 | ||
222 | ocd_do_command (OCD_RESET_RUN, &status, &pktlen); | |
c5aa993b | 223 | /* ocd_do_command (OCD_RESET, &status, &pktlen); */ |
c906108c SS |
224 | #endif |
225 | ||
226 | /* If processor is still running, stop it. */ | |
227 | ||
228 | if (!(status & OCD_FLAG_BDM)) | |
229 | ocd_stop (); | |
230 | ||
231 | #if 1 | |
232 | /* When using a target box, we want to asynchronously return status when | |
233 | target stops. The OCD_SET_CTL_FLAGS command is ignored by Wigglers.dll | |
234 | when using a parallel Wiggler */ | |
235 | buf[0] = OCD_SET_CTL_FLAGS; | |
236 | buf[1] = 0; | |
237 | buf[2] = 1; | |
238 | ocd_put_packet (buf, 3); | |
239 | ||
240 | p = ocd_get_packet (buf[0], &pktlen, remote_timeout); | |
241 | ||
242 | if (pktlen < 2) | |
243 | error ("Truncated response packet from OCD device"); | |
244 | ||
245 | status = p[1]; | |
246 | error_code = p[2]; | |
247 | ||
248 | if (error_code != 0) | |
249 | ocd_error ("OCD_SET_CTL_FLAGS:", error_code); | |
250 | #endif | |
251 | ||
252 | immediate_quit = 0; | |
253 | ||
254 | /* This is really the job of start_remote however, that makes an assumption | |
255 | that the target is about to print out a status message of some sort. That | |
256 | doesn't happen here (in fact, it may not be possible to get the monitor to | |
257 | send the appropriate packet). */ | |
258 | ||
259 | flush_cached_frames (); | |
260 | registers_changed (); | |
261 | stop_pc = read_pc (); | |
262 | set_current_frame (create_new_frame (read_fp (), stop_pc)); | |
263 | select_frame (get_current_frame (), 0); | |
264 | print_stack_frame (selected_frame, -1, 1); | |
265 | ||
266 | buf[0] = OCD_LOG_FILE; | |
c5aa993b | 267 | buf[1] = 3; /* close existing WIGGLERS.LOG */ |
c906108c SS |
268 | ocd_put_packet (buf, 2); |
269 | p = ocd_get_packet (buf[0], &pktlen, remote_timeout); | |
270 | ||
271 | buf[0] = OCD_LOG_FILE; | |
c5aa993b | 272 | buf[1] = 2; /* append to existing WIGGLERS.LOG */ |
c906108c SS |
273 | ocd_put_packet (buf, 2); |
274 | p = ocd_get_packet (buf[0], &pktlen, remote_timeout); | |
275 | ||
276 | return 1; | |
277 | } | |
278 | ||
279 | /* Open a connection to a remote debugger. | |
280 | NAME is the filename used for communication. */ | |
281 | ||
282 | static DCACHE *ocd_dcache; | |
283 | ||
284 | void | |
285 | ocd_open (name, from_tty, target_type, ops) | |
286 | char *name; | |
287 | int from_tty; | |
288 | enum ocd_target_type target_type; | |
289 | struct target_ops *ops; | |
290 | { | |
291 | unsigned char buf[10], *p; | |
c906108c SS |
292 | int pktlen; |
293 | ||
294 | if (name == 0) | |
295 | error ("To open an OCD connection, you need to specify the\n\ | |
296 | device the OCD device is attached to (e.g. /dev/ttya)."); | |
297 | ||
298 | target_preopen (from_tty); | |
299 | ||
300 | current_ops = ops; | |
301 | ||
302 | unpush_target (current_ops); | |
303 | ||
304 | ocd_dcache = dcache_init (ocd_read_bytes, ocd_write_bytes); | |
305 | ||
c5aa993b JM |
306 | if (strncmp (name, "wiggler", 7) == 0) |
307 | { | |
308 | ocd_desc = SERIAL_OPEN ("ocd"); | |
309 | if (!ocd_desc) | |
310 | perror_with_name (name); | |
311 | ||
312 | buf[0] = OCD_LOG_FILE; | |
313 | buf[1] = 1; /* open new or overwrite existing WIGGLERS.LOG */ | |
314 | ocd_put_packet (buf, 2); | |
315 | p = ocd_get_packet (buf[0], &pktlen, remote_timeout); | |
316 | ||
317 | buf[0] = OCD_SET_CONNECTION; | |
318 | buf[1] = 0x01; /* atoi (name[11]); */ | |
319 | ocd_put_packet (buf, 2); | |
320 | p = ocd_get_packet (buf[0], &pktlen, remote_timeout); | |
321 | } | |
322 | else | |
323 | /* not using Wigglers.dll */ | |
324 | { | |
325 | ocd_desc = SERIAL_OPEN (name); | |
326 | if (!ocd_desc) | |
327 | perror_with_name (name); | |
328 | } | |
c906108c SS |
329 | |
330 | if (baud_rate != -1) | |
331 | { | |
332 | if (SERIAL_SETBAUDRATE (ocd_desc, baud_rate)) | |
333 | { | |
334 | SERIAL_CLOSE (ocd_desc); | |
335 | perror_with_name (name); | |
336 | } | |
337 | } | |
338 | ||
339 | SERIAL_RAW (ocd_desc); | |
340 | ||
341 | /* If there is something sitting in the buffer we might take it as a | |
342 | response to a command, which would be bad. */ | |
343 | SERIAL_FLUSH_INPUT (ocd_desc); | |
344 | ||
345 | if (from_tty) | |
346 | { | |
347 | puts_filtered ("Remote target wiggler connected to "); | |
348 | puts_filtered (name); | |
349 | puts_filtered ("\n"); | |
350 | } | |
351 | push_target (current_ops); /* Switch to using remote target now */ | |
352 | ||
353 | /* Without this, some commands which require an active target (such as kill) | |
354 | won't work. This variable serves (at least) double duty as both the pid | |
355 | of the target process (if it has such), and as a flag indicating that a | |
356 | target is active. These functions should be split out into seperate | |
357 | variables, especially since GDB will someday have a notion of debugging | |
358 | several processes. */ | |
359 | ||
360 | inferior_pid = 42000; | |
361 | /* Start the remote connection; if error (0), discard this target. | |
362 | In particular, if the user quits, be sure to discard it | |
363 | (we'd be in an inconsistent state otherwise). */ | |
364 | if (!catch_errors (ocd_start_remote, &target_type, | |
365 | "Couldn't establish connection to remote target\n", | |
366 | RETURN_MASK_ALL)) | |
367 | { | |
c5aa993b | 368 | pop_target (); |
c906108c SS |
369 | error ("Failed to connect to OCD."); |
370 | } | |
371 | } | |
372 | ||
373 | /* This takes a program previously attached to and detaches it. After | |
374 | this is done, GDB can be used to debug some other program. We | |
375 | better not have left any breakpoints in the target program or it'll | |
376 | die when it hits one. */ | |
377 | ||
378 | void | |
379 | ocd_detach (args, from_tty) | |
380 | char *args; | |
381 | int from_tty; | |
382 | { | |
383 | if (args) | |
384 | error ("Argument given to \"detach\" when remotely debugging."); | |
385 | ||
386 | pop_target (); | |
387 | if (from_tty) | |
388 | puts_filtered ("Ending remote debugging.\n"); | |
389 | } | |
390 | \f | |
391 | /* Tell the remote machine to resume. */ | |
392 | ||
393 | void | |
394 | ocd_resume (pid, step, siggnal) | |
395 | int pid, step; | |
396 | enum target_signal siggnal; | |
397 | { | |
398 | int pktlen; | |
399 | ||
400 | dcache_flush (ocd_dcache); | |
401 | ||
402 | if (step) | |
403 | ocd_do_command (OCD_STEP, &last_run_status, &pktlen); | |
404 | else | |
405 | ocd_do_command (OCD_RUN, &last_run_status, &pktlen); | |
406 | } | |
407 | \f | |
408 | void | |
409 | ocd_stop () | |
410 | { | |
411 | int status; | |
412 | int pktlen; | |
413 | ||
414 | ocd_do_command (OCD_STOP, &status, &pktlen); | |
415 | ||
416 | if (!(status & OCD_FLAG_BDM)) | |
417 | error ("Can't stop target via BDM"); | |
418 | } | |
419 | ||
420 | static volatile int ocd_interrupt_flag; | |
421 | ||
422 | /* Send ^C to target to halt it. Target will respond, and send us a | |
423 | packet. */ | |
424 | ||
425 | static void | |
426 | ocd_interrupt (signo) | |
427 | int signo; | |
428 | { | |
429 | /* If this doesn't work, try more severe steps. */ | |
430 | signal (signo, ocd_interrupt_twice); | |
c5aa993b | 431 | |
c906108c SS |
432 | if (remote_debug) |
433 | printf_unfiltered ("ocd_interrupt called\n"); | |
434 | ||
435 | { | |
436 | char buf[1]; | |
437 | ||
438 | ocd_stop (); | |
439 | buf[0] = OCD_AYT; | |
440 | ocd_put_packet (buf, 1); | |
441 | ocd_interrupt_flag = 1; | |
442 | } | |
443 | } | |
444 | ||
c5aa993b | 445 | static void (*ofunc) (); |
c906108c SS |
446 | |
447 | /* The user typed ^C twice. */ | |
448 | static void | |
449 | ocd_interrupt_twice (signo) | |
450 | int signo; | |
451 | { | |
452 | signal (signo, ofunc); | |
c5aa993b | 453 | |
c906108c SS |
454 | interrupt_query (); |
455 | ||
456 | signal (signo, ocd_interrupt); | |
457 | } | |
458 | ||
459 | /* Ask the user what to do when an interrupt is received. */ | |
460 | ||
461 | static void | |
462 | interrupt_query () | |
463 | { | |
464 | target_terminal_ours (); | |
465 | ||
466 | if (query ("Interrupted while waiting for the program.\n\ | |
467 | Give up (and stop debugging it)? ")) | |
468 | { | |
469 | target_mourn_inferior (); | |
470 | return_to_top_level (RETURN_QUIT); | |
471 | } | |
472 | ||
473 | target_terminal_inferior (); | |
474 | } | |
475 | ||
476 | /* If nonzero, ignore the next kill. */ | |
477 | static int kill_kludge; | |
478 | ||
479 | /* Wait until the remote machine stops, then return, | |
480 | storing status in STATUS just as `wait' would. | |
481 | Returns "pid" (though it's not clear what, if anything, that | |
482 | means in the case of this target). */ | |
483 | ||
484 | int | |
485 | ocd_wait () | |
486 | { | |
487 | unsigned char *p; | |
488 | int error_code; | |
489 | int pktlen; | |
490 | char buf[1]; | |
491 | ||
492 | ocd_interrupt_flag = 0; | |
493 | ||
494 | /* Target might already be stopped by the time we get here. */ | |
495 | /* If we aren't already stopped, we need to loop until we've dropped | |
496 | back into BDM mode */ | |
497 | ||
498 | while (!(last_run_status & OCD_FLAG_BDM)) | |
499 | { | |
500 | buf[0] = OCD_AYT; | |
501 | ocd_put_packet (buf, 1); | |
502 | p = ocd_get_packet (OCD_AYT, &pktlen, -1); | |
503 | ||
504 | ofunc = (void (*)()) signal (SIGINT, ocd_interrupt); | |
505 | signal (SIGINT, ofunc); | |
506 | ||
507 | if (pktlen < 2) | |
508 | error ("Truncated response packet from OCD device"); | |
509 | ||
510 | last_run_status = p[1]; | |
511 | error_code = p[2]; | |
512 | ||
513 | if (error_code != 0) | |
514 | ocd_error ("target_wait:", error_code); | |
515 | ||
516 | if (last_run_status & OCD_FLAG_PWF) | |
517 | error ("OCD device lost VCC at BDM interface."); | |
518 | else if (last_run_status & OCD_FLAG_CABLE_DISC) | |
519 | error ("OCD device cable appears to have been disconnected."); | |
520 | } | |
521 | ||
522 | if (ocd_interrupt_flag) | |
523 | return 1; | |
524 | else | |
525 | return 0; | |
526 | } | |
527 | ||
528 | /* Read registers from the OCD device. Specify the starting and ending | |
529 | register number. Return the number of regs actually read in *NUMREGS. | |
530 | Returns a pointer to a static array containing the register contents. */ | |
531 | ||
532 | unsigned char * | |
533 | ocd_read_bdm_registers (first_bdm_regno, last_bdm_regno, reglen) | |
534 | int first_bdm_regno; | |
535 | int last_bdm_regno; | |
536 | int *reglen; | |
537 | { | |
538 | unsigned char buf[10]; | |
539 | int i; | |
540 | unsigned char *p; | |
541 | unsigned char *regs; | |
542 | int error_code, status; | |
543 | int pktlen; | |
544 | ||
545 | buf[0] = OCD_READ_REGS; | |
546 | buf[1] = first_bdm_regno >> 8; | |
547 | buf[2] = first_bdm_regno & 0xff; | |
548 | buf[3] = last_bdm_regno >> 8; | |
549 | buf[4] = last_bdm_regno & 0xff; | |
550 | ||
551 | ocd_put_packet (buf, 5); | |
552 | p = ocd_get_packet (OCD_READ_REGS, &pktlen, remote_timeout); | |
553 | ||
554 | status = p[1]; | |
555 | error_code = p[2]; | |
556 | ||
557 | if (error_code != 0) | |
558 | ocd_error ("read_bdm_registers:", error_code); | |
559 | ||
560 | i = p[3]; | |
561 | if (i == 0) | |
562 | i = 256; | |
563 | ||
564 | if (i > pktlen - 4 | |
565 | || ((i & 3) != 0)) | |
566 | error ("Register block size bad: %d", i); | |
567 | ||
568 | *reglen = i; | |
569 | ||
570 | regs = p + 4; | |
571 | ||
572 | return regs; | |
573 | } | |
574 | ||
575 | /* Read register BDM_REGNO and returns its value ala read_register() */ | |
576 | ||
577 | CORE_ADDR | |
578 | ocd_read_bdm_register (bdm_regno) | |
579 | int bdm_regno; | |
580 | { | |
581 | int reglen; | |
582 | unsigned char *p; | |
583 | CORE_ADDR regval; | |
584 | ||
585 | p = ocd_read_bdm_registers (bdm_regno, bdm_regno, ®len); | |
586 | regval = extract_unsigned_integer (p, reglen); | |
587 | ||
588 | return regval; | |
589 | } | |
590 | ||
591 | void | |
592 | ocd_write_bdm_registers (first_bdm_regno, regptr, reglen) | |
593 | int first_bdm_regno; | |
594 | unsigned char *regptr; | |
595 | int reglen; | |
596 | { | |
597 | unsigned char *buf; | |
598 | unsigned char *p; | |
599 | int error_code, status; | |
600 | int pktlen; | |
601 | ||
602 | buf = alloca (4 + reglen); | |
603 | ||
604 | buf[0] = OCD_WRITE_REGS; | |
605 | buf[1] = first_bdm_regno >> 8; | |
606 | buf[2] = first_bdm_regno & 0xff; | |
607 | buf[3] = reglen; | |
608 | memcpy (buf + 4, regptr, reglen); | |
609 | ||
610 | ocd_put_packet (buf, 4 + reglen); | |
611 | p = ocd_get_packet (OCD_WRITE_REGS, &pktlen, remote_timeout); | |
612 | ||
613 | if (pktlen < 3) | |
614 | error ("Truncated response packet from OCD device"); | |
615 | ||
616 | status = p[1]; | |
617 | error_code = p[2]; | |
618 | ||
619 | if (error_code != 0) | |
620 | ocd_error ("ocd_write_bdm_registers:", error_code); | |
621 | } | |
622 | ||
623 | void | |
624 | ocd_write_bdm_register (bdm_regno, reg) | |
625 | int bdm_regno; | |
626 | CORE_ADDR reg; | |
627 | { | |
628 | unsigned char buf[4]; | |
629 | ||
630 | store_unsigned_integer (buf, 4, reg); | |
631 | ||
632 | ocd_write_bdm_registers (bdm_regno, buf, 4); | |
633 | } | |
634 | \f | |
c5aa993b | 635 | void |
c906108c SS |
636 | ocd_prepare_to_store () |
637 | { | |
638 | } | |
639 | \f | |
640 | /* Write memory data directly to the remote machine. | |
641 | This does not inform the data cache; the data cache uses this. | |
642 | MEMADDR is the address in the remote memory space. | |
643 | MYADDR is the address of the buffer in our space. | |
644 | LEN is the number of bytes. | |
645 | ||
646 | Returns number of bytes transferred, or 0 for error. */ | |
647 | ||
648 | static int write_mem_command = OCD_WRITE_MEM; | |
649 | ||
650 | int | |
651 | ocd_write_bytes (memaddr, myaddr, len) | |
652 | CORE_ADDR memaddr; | |
653 | char *myaddr; | |
654 | int len; | |
655 | { | |
656 | char buf[256 + 10]; | |
657 | unsigned char *p; | |
658 | int origlen; | |
659 | ||
660 | origlen = len; | |
661 | ||
662 | buf[0] = write_mem_command; | |
663 | buf[5] = 1; /* Write as bytes */ | |
664 | buf[6] = 0; /* Don't verify */ | |
665 | ||
666 | while (len > 0) | |
667 | { | |
668 | int numbytes; | |
669 | int pktlen; | |
670 | int status, error_code; | |
671 | ||
672 | numbytes = min (len, 256 - 8); | |
673 | ||
674 | buf[1] = memaddr >> 24; | |
675 | buf[2] = memaddr >> 16; | |
676 | buf[3] = memaddr >> 8; | |
677 | buf[4] = memaddr; | |
678 | ||
679 | buf[7] = numbytes; | |
680 | ||
681 | memcpy (&buf[8], myaddr, numbytes); | |
682 | ocd_put_packet (buf, 8 + numbytes); | |
683 | p = ocd_get_packet (OCD_WRITE_MEM, &pktlen, remote_timeout); | |
684 | if (pktlen < 3) | |
685 | error ("Truncated response packet from OCD device"); | |
686 | ||
687 | status = p[1]; | |
688 | error_code = p[2]; | |
689 | ||
690 | if (error_code == 0x11) /* Got a bus error? */ | |
691 | { | |
692 | CORE_ADDR error_address; | |
693 | ||
694 | error_address = p[3] << 24; | |
695 | error_address |= p[4] << 16; | |
696 | error_address |= p[5] << 8; | |
697 | error_address |= p[6]; | |
698 | numbytes = error_address - memaddr; | |
699 | ||
700 | len -= numbytes; | |
701 | ||
702 | errno = EIO; | |
703 | ||
704 | break; | |
705 | } | |
706 | else if (error_code != 0) | |
707 | ocd_error ("ocd_write_bytes:", error_code); | |
708 | ||
709 | len -= numbytes; | |
710 | memaddr += numbytes; | |
711 | myaddr += numbytes; | |
712 | } | |
713 | ||
714 | return origlen - len; | |
715 | } | |
716 | ||
717 | /* Read memory data directly from the remote machine. | |
718 | This does not use the data cache; the data cache uses this. | |
719 | MEMADDR is the address in the remote memory space. | |
720 | MYADDR is the address of the buffer in our space. | |
721 | LEN is the number of bytes. | |
722 | ||
723 | Returns number of bytes transferred, or 0 for error. */ | |
724 | ||
725 | static int | |
726 | ocd_read_bytes (memaddr, myaddr, len) | |
727 | CORE_ADDR memaddr; | |
728 | char *myaddr; | |
729 | int len; | |
730 | { | |
731 | char buf[256 + 10]; | |
732 | unsigned char *p; | |
733 | int origlen; | |
734 | ||
735 | origlen = len; | |
736 | ||
737 | buf[0] = OCD_READ_MEM; | |
738 | buf[5] = 1; /* Read as bytes */ | |
739 | ||
740 | while (len > 0) | |
741 | { | |
742 | int numbytes; | |
743 | int pktlen; | |
744 | int status, error_code; | |
745 | ||
746 | numbytes = min (len, 256 - 7); | |
747 | ||
748 | buf[1] = memaddr >> 24; | |
749 | buf[2] = memaddr >> 16; | |
750 | buf[3] = memaddr >> 8; | |
751 | buf[4] = memaddr; | |
752 | ||
753 | buf[6] = numbytes; | |
754 | ||
755 | ocd_put_packet (buf, 7); | |
756 | p = ocd_get_packet (OCD_READ_MEM, &pktlen, remote_timeout); | |
757 | if (pktlen < 4) | |
758 | error ("Truncated response packet from OCD device"); | |
759 | ||
760 | status = p[1]; | |
761 | error_code = p[2]; | |
762 | ||
763 | if (error_code == 0x11) /* Got a bus error? */ | |
764 | { | |
765 | CORE_ADDR error_address; | |
766 | ||
767 | error_address = p[3] << 24; | |
768 | error_address |= p[4] << 16; | |
769 | error_address |= p[5] << 8; | |
770 | error_address |= p[6]; | |
771 | numbytes = error_address - memaddr; | |
772 | ||
773 | len -= numbytes; | |
774 | ||
775 | errno = EIO; | |
776 | ||
777 | break; | |
778 | } | |
779 | else if (error_code != 0) | |
780 | ocd_error ("ocd_read_bytes:", error_code); | |
781 | ||
782 | memcpy (myaddr, &p[4], numbytes); | |
783 | ||
784 | len -= numbytes; | |
785 | memaddr += numbytes; | |
786 | myaddr += numbytes; | |
787 | } | |
788 | ||
789 | return origlen - len; | |
790 | } | |
791 | \f | |
792 | /* Read or write LEN bytes from inferior memory at MEMADDR, transferring | |
793 | to or from debugger address MYADDR. Write to inferior if SHOULD_WRITE is | |
794 | nonzero. Returns length of data written or read; 0 for error. */ | |
795 | ||
796 | /* ARGSUSED */ | |
797 | int | |
798 | ocd_xfer_memory (memaddr, myaddr, len, should_write, target) | |
799 | CORE_ADDR memaddr; | |
800 | char *myaddr; | |
801 | int len; | |
802 | int should_write; | |
c5aa993b | 803 | struct target_ops *target; /* ignored */ |
c906108c SS |
804 | { |
805 | return dcache_xfer_memory (ocd_dcache, memaddr, myaddr, len, should_write); | |
806 | } | |
807 | \f | |
808 | void | |
809 | ocd_files_info (ignore) | |
810 | struct target_ops *ignore; | |
811 | { | |
812 | puts_filtered ("Debugging a target over a serial line.\n"); | |
813 | } | |
814 | \f | |
815 | /* Stuff for dealing with the packets which are part of this protocol. | |
816 | See comment at top of file for details. */ | |
817 | ||
818 | /* Read a single character from the remote side, handling wierd errors. */ | |
819 | ||
820 | static int | |
821 | readchar (timeout) | |
822 | int timeout; | |
823 | { | |
824 | int ch; | |
825 | ||
826 | ch = SERIAL_READCHAR (ocd_desc, timeout); | |
827 | ||
828 | switch (ch) | |
829 | { | |
830 | case SERIAL_EOF: | |
831 | error ("Remote connection closed"); | |
832 | case SERIAL_ERROR: | |
833 | perror_with_name ("Remote communication error"); | |
834 | case SERIAL_TIMEOUT: | |
835 | default: | |
836 | return ch; | |
837 | } | |
838 | } | |
839 | ||
840 | #if 0 | |
841 | /* Read a character from the data stream, dequoting as necessary. SYN is | |
842 | treated special. Any SYNs appearing in the data stream are returned as the | |
843 | distinct value RAW_SYN (which has a value > 8 bits and therefore cannot be | |
844 | mistaken for real data). */ | |
845 | ||
846 | static int | |
847 | get_quoted_char (timeout) | |
848 | int timeout; | |
849 | { | |
850 | int ch; | |
851 | ||
852 | ch = readchar (timeout); | |
853 | ||
854 | switch (ch) | |
855 | { | |
856 | case SERIAL_TIMEOUT: | |
857 | error ("Timeout in mid-packet, aborting"); | |
858 | case SYN: | |
859 | return RAW_SYN; | |
860 | case DLE: | |
861 | ch = readchar (timeout); | |
862 | if (ch == SYN) | |
863 | return RAW_SYN; | |
864 | return ch & ~0100; | |
865 | default: | |
866 | return ch; | |
867 | } | |
868 | } | |
869 | ||
c5aa993b | 870 | static unsigned char pkt[256 * 2 + 10], *pktp; /* Worst case */ |
c906108c SS |
871 | |
872 | static void | |
873 | reset_packet () | |
874 | { | |
875 | pktp = pkt; | |
876 | } | |
877 | ||
878 | static void | |
879 | output_packet () | |
880 | { | |
881 | if (SERIAL_WRITE (ocd_desc, pkt, pktp - pkt)) | |
882 | perror_with_name ("output_packet: write failed"); | |
883 | ||
884 | reset_packet (); | |
885 | } | |
886 | ||
887 | /* Output a quoted character. SYNs and DLEs are quoted. Everything else goes | |
888 | through untouched. */ | |
889 | ||
890 | static void | |
891 | put_quoted_char (c) | |
892 | int c; | |
893 | { | |
894 | switch (c) | |
895 | { | |
896 | case SYN: | |
897 | case DLE: | |
898 | *pktp++ = DLE; | |
899 | c |= 0100; | |
900 | } | |
901 | ||
902 | *pktp++ = c; | |
903 | } | |
904 | ||
905 | /* Send a packet to the OCD device. The packet framed by a SYN character, | |
906 | a byte count and a checksum. The byte count only counts the number of | |
907 | bytes between the count and the checksum. A count of zero actually | |
908 | means 256. Any SYNs within the packet (including the checksum and | |
909 | count) must be quoted. The quote character must be quoted as well. | |
910 | Quoting is done by replacing the character with the two-character sequence | |
911 | DLE, {char} | 0100. Note that the quoting mechanism has no effect on the | |
912 | byte count. */ | |
913 | ||
914 | static void | |
915 | stu_put_packet (buf, len) | |
916 | unsigned char *buf; | |
917 | int len; | |
918 | { | |
919 | unsigned char checksum; | |
920 | unsigned char c; | |
921 | ||
922 | if (len == 0 || len > 256) | |
923 | abort (); /* Can't represent 0 length packet */ | |
924 | ||
925 | reset_packet (); | |
926 | ||
927 | checksum = 0; | |
928 | ||
929 | put_quoted_char (RAW_SYN); | |
930 | ||
931 | c = len; | |
932 | ||
933 | do | |
934 | { | |
935 | checksum += c; | |
936 | ||
937 | put_quoted_char (c); | |
938 | ||
939 | c = *buf++; | |
940 | } | |
941 | while (len-- > 0); | |
942 | ||
943 | put_quoted_char (-checksum & 0xff); | |
944 | ||
945 | output_packet (); | |
946 | } | |
947 | ||
948 | #else | |
949 | ||
950 | /* Send a packet to the OCD device. The packet framed by a SYN character, | |
951 | a byte count and a checksum. The byte count only counts the number of | |
952 | bytes between the count and the checksum. A count of zero actually | |
953 | means 256. Any SYNs within the packet (including the checksum and | |
954 | count) must be quoted. The quote character must be quoted as well. | |
955 | Quoting is done by replacing the character with the two-character sequence | |
956 | DLE, {char} | 0100. Note that the quoting mechanism has no effect on the | |
957 | byte count. */ | |
958 | ||
959 | static void | |
960 | ocd_put_packet (buf, len) | |
961 | unsigned char *buf; | |
962 | int len; | |
963 | { | |
964 | unsigned char checksum; | |
965 | unsigned char c; | |
966 | unsigned char *packet, *packet_ptr; | |
967 | ||
c5aa993b | 968 | packet = alloca (len + 1 + 1); /* packet + SYN + checksum */ |
c906108c SS |
969 | packet_ptr = packet; |
970 | ||
971 | checksum = 0; | |
972 | ||
973 | *packet_ptr++ = 0x55; | |
974 | ||
975 | while (len-- > 0) | |
976 | { | |
977 | c = *buf++; | |
978 | ||
979 | checksum += c; | |
980 | *packet_ptr++ = c; | |
981 | } | |
982 | ||
983 | *packet_ptr++ = -checksum; | |
984 | if (SERIAL_WRITE (ocd_desc, packet, packet_ptr - packet)) | |
985 | perror_with_name ("output_packet: write failed"); | |
986 | } | |
987 | #endif | |
988 | ||
989 | #if 0 | |
990 | /* Get a packet from the OCD device. Timeout is only enforced for the | |
991 | first byte of the packet. Subsequent bytes are expected to arrive in | |
992 | time <= remote_timeout. Returns a pointer to a static buffer containing | |
993 | the payload of the packet. *LENP contains the length of the packet. | |
c5aa993b | 994 | */ |
c906108c SS |
995 | |
996 | static unsigned char * | |
997 | stu_get_packet (cmd, lenp, timeout) | |
998 | unsigned char cmd; | |
999 | int *lenp; | |
1000 | { | |
1001 | int ch; | |
1002 | int len; | |
1003 | static unsigned char buf[256 + 10], *p; | |
1004 | unsigned char checksum; | |
1005 | ||
c5aa993b | 1006 | find_packet: |
c906108c SS |
1007 | |
1008 | ch = get_quoted_char (timeout); | |
1009 | ||
1010 | if (ch < 0) | |
1011 | error ("get_packet (readchar): %d", ch); | |
1012 | ||
1013 | if (ch != RAW_SYN) | |
1014 | goto find_packet; | |
1015 | ||
c5aa993b | 1016 | found_syn: /* Found the start of a packet */ |
c906108c SS |
1017 | |
1018 | p = buf; | |
1019 | checksum = 0; | |
1020 | ||
1021 | len = get_quoted_char (remote_timeout); | |
1022 | ||
1023 | if (len == RAW_SYN) | |
1024 | goto found_syn; | |
1025 | ||
1026 | checksum += len; | |
1027 | ||
1028 | if (len == 0) | |
1029 | len = 256; | |
1030 | ||
1031 | len++; /* Include checksum */ | |
1032 | ||
1033 | while (len-- > 0) | |
1034 | { | |
1035 | ch = get_quoted_char (remote_timeout); | |
1036 | if (ch == RAW_SYN) | |
1037 | goto found_syn; | |
1038 | ||
1039 | *p++ = ch; | |
1040 | checksum += ch; | |
1041 | } | |
1042 | ||
1043 | if (checksum != 0) | |
1044 | goto find_packet; | |
1045 | ||
1046 | if (cmd != buf[0]) | |
1047 | error ("Response phase error. Got 0x%x, expected 0x%x", buf[0], cmd); | |
1048 | ||
1049 | *lenp = p - buf - 1; | |
1050 | return buf; | |
1051 | } | |
1052 | ||
1053 | #else | |
1054 | ||
1055 | /* Get a packet from the OCD device. Timeout is only enforced for the | |
1056 | first byte of the packet. Subsequent bytes are expected to arrive in | |
1057 | time <= remote_timeout. Returns a pointer to a static buffer containing | |
1058 | the payload of the packet. *LENP contains the length of the packet. | |
c5aa993b | 1059 | */ |
c906108c SS |
1060 | |
1061 | static unsigned char * | |
1062 | ocd_get_packet (cmd, lenp, timeout) | |
1063 | int cmd; | |
1064 | int *lenp; | |
1065 | { | |
1066 | int ch; | |
1067 | int len; | |
c906108c SS |
1068 | static unsigned char packet[512]; |
1069 | unsigned char *packet_ptr; | |
1070 | unsigned char checksum; | |
1071 | ||
1072 | ch = readchar (timeout); | |
1073 | ||
1074 | if (ch < 0) | |
1075 | error ("ocd_get_packet (readchar): %d", ch); | |
1076 | ||
1077 | if (ch != 0x55) | |
1078 | error ("ocd_get_packet (readchar): %d", ch); | |
1079 | ||
1080 | /* Found the start of a packet */ | |
1081 | ||
1082 | packet_ptr = packet; | |
1083 | checksum = 0; | |
1084 | ||
1085 | /* Read command char. That sort of tells us how long the packet is. */ | |
1086 | ||
1087 | ch = readchar (timeout); | |
1088 | ||
1089 | if (ch < 0) | |
1090 | error ("ocd_get_packet (readchar): %d", ch); | |
1091 | ||
1092 | *packet_ptr++ = ch; | |
1093 | checksum += ch; | |
1094 | ||
1095 | /* Get status. */ | |
1096 | ||
1097 | ch = readchar (timeout); | |
1098 | ||
1099 | if (ch < 0) | |
1100 | error ("ocd_get_packet (readchar): %d", ch); | |
1101 | *packet_ptr++ = ch; | |
1102 | checksum += ch; | |
1103 | ||
1104 | /* Get error code. */ | |
1105 | ||
1106 | ch = readchar (timeout); | |
1107 | ||
1108 | if (ch < 0) | |
1109 | error ("ocd_get_packet (readchar): %d", ch); | |
1110 | *packet_ptr++ = ch; | |
1111 | checksum += ch; | |
1112 | ||
1113 | switch (ch) /* Figure out length of packet */ | |
1114 | { | |
1115 | case 0x7: /* Write verify error? */ | |
1116 | len = 8; /* write address, value read back */ | |
1117 | break; | |
1118 | case 0x11: /* Bus error? */ | |
c5aa993b | 1119 | /* write address, read flag */ |
c906108c SS |
1120 | case 0x15: /* Internal error */ |
1121 | len = 5; /* error code, vector */ | |
1122 | break; | |
1123 | default: /* Error w/no params */ | |
1124 | len = 0; | |
1125 | break; | |
1126 | case 0x0: /* Normal result */ | |
1127 | switch (packet[0]) | |
1128 | { | |
c5aa993b JM |
1129 | case OCD_AYT: /* Are You There? */ |
1130 | case OCD_SET_BAUD_RATE: /* Set Baud Rate */ | |
1131 | case OCD_INIT: /* Initialize OCD device */ | |
c906108c | 1132 | case OCD_SET_SPEED: /* Set Speed */ |
c5aa993b JM |
1133 | case OCD_SET_FUNC_CODE: /* Set Function Code */ |
1134 | case OCD_SET_CTL_FLAGS: /* Set Control Flags */ | |
1135 | case OCD_SET_BUF_ADDR: /* Set Register Buffer Address */ | |
1136 | case OCD_RUN: /* Run Target from PC */ | |
c906108c | 1137 | case OCD_RUN_ADDR: /* Run Target from Specified Address */ |
c5aa993b | 1138 | case OCD_STOP: /* Stop Target */ |
c906108c SS |
1139 | case OCD_RESET_RUN: /* Reset Target and Run */ |
1140 | case OCD_RESET: /* Reset Target and Halt */ | |
c5aa993b JM |
1141 | case OCD_STEP: /* Single Step */ |
1142 | case OCD_WRITE_REGS: /* Write Register */ | |
c906108c SS |
1143 | case OCD_WRITE_MEM: /* Write Memory */ |
1144 | case OCD_FILL_MEM: /* Fill Memory */ | |
1145 | case OCD_MOVE_MEM: /* Move Memory */ | |
c5aa993b JM |
1146 | case OCD_WRITE_INT_MEM: /* Write Internal Memory */ |
1147 | case OCD_JUMP: /* Jump to Subroutine */ | |
1148 | case OCD_ERASE_FLASH: /* Erase flash memory */ | |
1149 | case OCD_PROGRAM_FLASH: /* Write flash memory */ | |
c906108c SS |
1150 | case OCD_EXIT_MON: /* Exit the flash programming monitor */ |
1151 | case OCD_ENTER_MON: /* Enter the flash programming monitor */ | |
1152 | case OCD_LOG_FILE: /* Make Wigglers.dll save Wigglers.log */ | |
c5aa993b | 1153 | case OCD_SET_CONNECTION: /* Set type of connection in Wigglers.dll */ |
c906108c SS |
1154 | len = 0; |
1155 | break; | |
c5aa993b | 1156 | case OCD_GET_VERSION: /* Get Version */ |
c906108c SS |
1157 | len = 10; |
1158 | break; | |
c5aa993b | 1159 | case OCD_GET_STATUS_MASK: /* Get Status Mask */ |
c906108c SS |
1160 | len = 1; |
1161 | break; | |
1162 | case OCD_GET_CTRS: /* Get Error Counters */ | |
1163 | case OCD_READ_REGS: /* Read Register */ | |
1164 | case OCD_READ_MEM: /* Read Memory */ | |
c5aa993b | 1165 | case OCD_READ_INT_MEM: /* Read Internal Memory */ |
c906108c SS |
1166 | len = 257; |
1167 | break; | |
1168 | default: | |
1169 | error ("ocd_get_packet: unknown packet type 0x%x\n", ch); | |
1170 | } | |
1171 | } | |
1172 | ||
1173 | if (len == 257) /* Byte stream? */ | |
1174 | { /* Yes, byte streams contain the length */ | |
1175 | ch = readchar (timeout); | |
1176 | ||
1177 | if (ch < 0) | |
1178 | error ("ocd_get_packet (readchar): %d", ch); | |
1179 | *packet_ptr++ = ch; | |
1180 | checksum += ch; | |
1181 | len = ch; | |
1182 | if (len == 0) | |
1183 | len = 256; | |
1184 | } | |
1185 | ||
1186 | while (len-- >= 0) /* Do rest of packet and checksum */ | |
1187 | { | |
1188 | ch = readchar (timeout); | |
1189 | ||
1190 | if (ch < 0) | |
1191 | error ("ocd_get_packet (readchar): %d", ch); | |
1192 | *packet_ptr++ = ch; | |
1193 | checksum += ch; | |
1194 | } | |
1195 | ||
1196 | if (checksum != 0) | |
1197 | error ("ocd_get_packet: bad packet checksum"); | |
1198 | ||
1199 | if (cmd != -1 && cmd != packet[0]) | |
1200 | error ("Response phase error. Got 0x%x, expected 0x%x", packet[0], cmd); | |
1201 | ||
c5aa993b | 1202 | *lenp = packet_ptr - packet - 1; /* Subtract checksum byte */ |
c906108c SS |
1203 | return packet; |
1204 | } | |
1205 | #endif | |
1206 | ||
1207 | /* Execute a simple (one-byte) command. Returns a pointer to the data | |
1208 | following the error code. */ | |
1209 | ||
1210 | static unsigned char * | |
1211 | ocd_do_command (cmd, statusp, lenp) | |
1212 | int cmd; | |
1213 | int *statusp; | |
1214 | int *lenp; | |
1215 | { | |
1216 | unsigned char buf[100], *p; | |
1217 | int status, error_code; | |
1218 | char errbuf[100]; | |
1219 | ||
1220 | unsigned char logbuf[100]; | |
1221 | int logpktlen; | |
1222 | ||
1223 | buf[0] = cmd; | |
c5aa993b | 1224 | ocd_put_packet (buf, 1); /* Send command */ |
c906108c SS |
1225 | p = ocd_get_packet (*buf, lenp, remote_timeout); |
1226 | ||
1227 | if (*lenp < 3) | |
1228 | error ("Truncated response packet from OCD device"); | |
1229 | ||
1230 | status = p[1]; | |
1231 | error_code = p[2]; | |
1232 | ||
1233 | if (error_code != 0) | |
1234 | { | |
1235 | sprintf (errbuf, "ocd_do_command (0x%x):", cmd); | |
1236 | ocd_error (errbuf, error_code); | |
1237 | } | |
1238 | ||
1239 | if (status & OCD_FLAG_PWF) | |
1240 | error ("OCD device can't detect VCC at BDM interface."); | |
1241 | else if (status & OCD_FLAG_CABLE_DISC) | |
1242 | error ("BDM cable appears to be disconnected."); | |
1243 | ||
1244 | *statusp = status; | |
1245 | ||
1246 | logbuf[0] = OCD_LOG_FILE; | |
c5aa993b | 1247 | logbuf[1] = 3; /* close existing WIGGLERS.LOG */ |
c906108c SS |
1248 | ocd_put_packet (logbuf, 2); |
1249 | ocd_get_packet (logbuf[0], &logpktlen, remote_timeout); | |
1250 | ||
1251 | logbuf[0] = OCD_LOG_FILE; | |
c5aa993b | 1252 | logbuf[1] = 2; /* append to existing WIGGLERS.LOG */ |
c906108c SS |
1253 | ocd_put_packet (logbuf, 2); |
1254 | ocd_get_packet (logbuf[0], &logpktlen, remote_timeout); | |
1255 | ||
1256 | return p + 3; | |
1257 | } | |
1258 | \f | |
1259 | void | |
1260 | ocd_kill () | |
1261 | { | |
1262 | /* For some mysterious reason, wait_for_inferior calls kill instead of | |
1263 | mourn after it gets TARGET_WAITKIND_SIGNALLED. Work around it. */ | |
1264 | if (kill_kludge) | |
1265 | { | |
1266 | kill_kludge = 0; | |
1267 | target_mourn_inferior (); | |
1268 | return; | |
1269 | } | |
1270 | ||
1271 | /* Don't wait for it to die. I'm not really sure it matters whether | |
1272 | we do or not. */ | |
1273 | target_mourn_inferior (); | |
1274 | } | |
1275 | ||
1276 | void | |
1277 | ocd_mourn () | |
1278 | { | |
1279 | unpush_target (current_ops); | |
1280 | generic_mourn_inferior (); | |
1281 | } | |
1282 | ||
1283 | /* All we actually do is set the PC to the start address of exec_bfd, and start | |
1284 | the program at that point. */ | |
1285 | ||
1286 | void | |
1287 | ocd_create_inferior (exec_file, args, env) | |
1288 | char *exec_file; | |
1289 | char *args; | |
1290 | char **env; | |
1291 | { | |
1292 | if (args && (*args != '\000')) | |
1293 | error ("Args are not supported by BDM."); | |
1294 | ||
1295 | clear_proceed_status (); | |
1296 | proceed (bfd_get_start_address (exec_bfd), TARGET_SIGNAL_0, 0); | |
1297 | } | |
1298 | ||
1299 | void | |
1300 | ocd_load (args, from_tty) | |
1301 | char *args; | |
1302 | int from_tty; | |
1303 | { | |
1304 | generic_load (args, from_tty); | |
1305 | ||
1306 | inferior_pid = 0; | |
1307 | ||
1308 | /* This is necessary because many things were based on the PC at the time that | |
1309 | we attached to the monitor, which is no longer valid now that we have loaded | |
1310 | new code (and just changed the PC). Another way to do this might be to call | |
1311 | normal_stop, except that the stack may not be valid, and things would get | |
1312 | horribly confused... */ | |
1313 | ||
1314 | clear_symtab_users (); | |
1315 | } | |
1316 | ||
1317 | /* This should be defined for each target */ | |
1318 | /* But we want to be able to compile this file for some configurations | |
1319 | not yet supported fully */ | |
c5aa993b JM |
1320 | |
1321 | #define BDM_BREAKPOINT {0x0,0x0,0x0,0x0} /* For ppc 8xx */ | |
c906108c | 1322 | #if 0 |
c5aa993b | 1323 | #define BDM_BREAKPOINT {0x4a,0xfa} /* BGND insn used for CPU32 */ |
c906108c SS |
1324 | #endif |
1325 | ||
1326 | /* BDM (at least on CPU32) uses a different breakpoint */ | |
1327 | ||
1328 | int | |
1329 | ocd_insert_breakpoint (addr, contents_cache) | |
1330 | CORE_ADDR addr; | |
1331 | char *contents_cache; | |
1332 | { | |
1333 | static char break_insn[] = BDM_BREAKPOINT; | |
1334 | int val; | |
1335 | ||
1336 | val = target_read_memory (addr, contents_cache, sizeof (break_insn)); | |
1337 | ||
1338 | if (val == 0) | |
1339 | val = target_write_memory (addr, break_insn, sizeof (break_insn)); | |
1340 | ||
1341 | return val; | |
1342 | } | |
1343 | ||
1344 | int | |
1345 | ocd_remove_breakpoint (addr, contents_cache) | |
1346 | CORE_ADDR addr; | |
1347 | char *contents_cache; | |
1348 | { | |
1349 | static char break_insn[] = BDM_BREAKPOINT; | |
1350 | int val; | |
1351 | ||
1352 | val = target_write_memory (addr, contents_cache, sizeof (break_insn)); | |
1353 | ||
1354 | return val; | |
1355 | } | |
1356 | ||
1357 | static void | |
1358 | bdm_command (args, from_tty) | |
1359 | char *args; | |
1360 | int from_tty; | |
1361 | { | |
1362 | error ("bdm command must be followed by `reset'"); | |
1363 | } | |
1364 | ||
1365 | static void | |
1366 | bdm_reset_command (args, from_tty) | |
1367 | char *args; | |
1368 | int from_tty; | |
1369 | { | |
1370 | int status, pktlen; | |
1371 | ||
1372 | if (!ocd_desc) | |
1373 | error ("Not connected to OCD device."); | |
1374 | ||
1375 | ocd_do_command (OCD_RESET, &status, &pktlen); | |
1376 | dcache_flush (ocd_dcache); | |
1377 | registers_changed (); | |
1378 | } | |
1379 | ||
1380 | static void | |
1381 | bdm_restart_command (args, from_tty) | |
1382 | char *args; | |
1383 | int from_tty; | |
1384 | { | |
1385 | int status, pktlen; | |
1386 | ||
1387 | if (!ocd_desc) | |
1388 | error ("Not connected to OCD device."); | |
1389 | ||
1390 | ocd_do_command (OCD_RESET_RUN, &status, &pktlen); | |
1391 | last_run_status = status; | |
1392 | clear_proceed_status (); | |
1393 | wait_for_inferior (); | |
1394 | normal_stop (); | |
1395 | } | |
1396 | ||
1397 | /* Temporary replacement for target_store_registers(). This prevents | |
1398 | generic_load from trying to set the PC. */ | |
1399 | ||
1400 | static void | |
1401 | noop_store_registers (regno) | |
1402 | int regno; | |
1403 | { | |
1404 | } | |
1405 | ||
1406 | static void | |
1407 | bdm_update_flash_command (args, from_tty) | |
1408 | char *args; | |
1409 | int from_tty; | |
1410 | { | |
1411 | int status, pktlen; | |
d4f3574e | 1412 | struct cleanup *old_chain; |
c906108c SS |
1413 | void (*store_registers_tmp) PARAMS ((int)); |
1414 | ||
1415 | if (!ocd_desc) | |
1416 | error ("Not connected to OCD device."); | |
1417 | ||
1418 | if (!args) | |
1419 | error ("Must specify file containing new OCD code."); | |
1420 | ||
c5aa993b | 1421 | /* old_chain = make_cleanup (flash_cleanup, 0); */ |
c906108c SS |
1422 | |
1423 | ocd_do_command (OCD_ENTER_MON, &status, &pktlen); | |
1424 | ||
1425 | ocd_do_command (OCD_ERASE_FLASH, &status, &pktlen); | |
1426 | ||
1427 | write_mem_command = OCD_PROGRAM_FLASH; | |
1428 | store_registers_tmp = current_target.to_store_registers; | |
1429 | current_target.to_store_registers = noop_store_registers; | |
1430 | ||
1431 | generic_load (args, from_tty); | |
1432 | ||
1433 | current_target.to_store_registers = store_registers_tmp; | |
1434 | write_mem_command = OCD_WRITE_MEM; | |
1435 | ||
1436 | ocd_do_command (OCD_EXIT_MON, &status, &pktlen); | |
1437 | ||
c5aa993b | 1438 | /* discard_cleanups (old_chain); */ |
c906108c SS |
1439 | } |
1440 | ||
1441 | static void | |
1442 | bdm_read_register_command (args, from_tty) | |
1443 | char *args; | |
1444 | int from_tty; | |
1445 | { | |
1446 | /* XXX repeat should go on to the next register */ | |
1447 | ||
1448 | if (!ocd_desc) | |
1449 | error ("Not connected to OCD device."); | |
1450 | ||
1451 | if (!args) | |
1452 | error ("Must specify BDM register number."); | |
1453 | ||
1454 | } | |
1455 | \f | |
1456 | void | |
1457 | _initialize_remote_ocd () | |
1458 | { | |
1459 | extern struct cmd_list_element *cmdlist; | |
1460 | static struct cmd_list_element *ocd_cmd_list = NULL; | |
1461 | ||
1462 | add_show_from_set (add_set_cmd ("remotetimeout", no_class, | |
c5aa993b JM |
1463 | var_integer, (char *) &remote_timeout, |
1464 | "Set timeout value for remote read.\n", &setlist), | |
c906108c SS |
1465 | &showlist); |
1466 | ||
1467 | add_prefix_cmd ("ocd", class_obscure, bdm_command, "", &ocd_cmd_list, "ocd ", | |
1468 | 0, &cmdlist); | |
1469 | ||
1470 | add_cmd ("reset", class_obscure, bdm_reset_command, "", &ocd_cmd_list); | |
1471 | add_cmd ("restart", class_obscure, bdm_restart_command, "", &ocd_cmd_list); | |
1472 | add_cmd ("update-flash", class_obscure, bdm_update_flash_command, "", &ocd_cmd_list); | |
c5aa993b | 1473 | /* add_cmd ("read-register", class_obscure, bdm_read_register_command, "", &ocd_cmd_list); */ |
c906108c | 1474 | } |