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 | ||
a14ed312 | 42 | static int ocd_read_bytes (CORE_ADDR memaddr, char *myaddr, int len); |
c906108c | 43 | |
a14ed312 | 44 | static int ocd_start_remote (PTR dummy); |
c906108c | 45 | |
a14ed312 | 46 | static int readchar (int timeout); |
c906108c | 47 | |
a14ed312 | 48 | static void reset_packet (void); |
c906108c | 49 | |
a14ed312 | 50 | static void output_packet (void); |
c906108c | 51 | |
a14ed312 | 52 | static int get_quoted_char (int timeout); |
c906108c | 53 | |
a14ed312 | 54 | static void put_quoted_char (int c); |
c906108c | 55 | |
a14ed312 | 56 | static void ocd_interrupt (int signo); |
c906108c | 57 | |
a14ed312 | 58 | static void ocd_interrupt_twice (int signo); |
c906108c | 59 | |
a14ed312 | 60 | static void interrupt_query (void); |
c906108c | 61 | |
a14ed312 | 62 | static unsigned char *ocd_do_command (int cmd, int *statusp, int *lenp); |
c906108c | 63 | |
a14ed312 | 64 | static void ocd_put_packet (unsigned char *packet, int pktlen); |
c906108c | 65 | |
a14ed312 | 66 | static unsigned char *ocd_get_packet (int cmd, int *pktlen, int timeout); |
c906108c SS |
67 | |
68 | static struct target_ops *current_ops = NULL; | |
69 | ||
70 | static int last_run_status; | |
71 | ||
72 | /* This was 5 seconds, which is a long time to sit and wait. | |
73 | Unless this is going though some terminal server or multiplexer or | |
74 | other form of hairy serial connection, I would think 2 seconds would | |
75 | be plenty. */ | |
76 | ||
77 | #if 0 | |
78 | /* FIXME: Change to allow option to set timeout value on a per target | |
79 | basis. */ | |
80 | static int remote_timeout = 2; | |
81 | #endif | |
82 | ||
83 | /* Descriptor for I/O to remote machine. Initialize it to NULL so that | |
84 | ocd_open knows that we don't have a file open when the program | |
85 | starts. */ | |
86 | static serial_t ocd_desc = NULL; | |
87 | \f | |
88 | void | |
89 | ocd_error (s, error_code) | |
90 | char *s; | |
91 | int error_code; | |
92 | { | |
93 | char buf[100]; | |
94 | ||
95 | fputs_filtered (s, gdb_stderr); | |
96 | fputs_filtered (" ", gdb_stderr); | |
97 | ||
98 | switch (error_code) | |
99 | { | |
c5aa993b JM |
100 | case 0x1: |
101 | s = "Unknown fault"; | |
102 | break; | |
103 | case 0x2: | |
104 | s = "Power failed"; | |
105 | break; | |
106 | case 0x3: | |
107 | s = "Cable disconnected"; | |
108 | break; | |
109 | case 0x4: | |
110 | s = "Couldn't enter OCD mode"; | |
111 | break; | |
112 | case 0x5: | |
113 | s = "Target stuck in reset"; | |
114 | break; | |
115 | case 0x6: | |
116 | s = "OCD hasn't been initialized"; | |
117 | break; | |
118 | case 0x7: | |
119 | s = "Write verify failed"; | |
120 | break; | |
121 | case 0x8: | |
122 | s = "Reg buff error (during MPC5xx fp reg read/write)"; | |
123 | break; | |
124 | case 0x9: | |
125 | s = "Invalid CPU register access attempt failed"; | |
126 | break; | |
127 | case 0x11: | |
128 | s = "Bus error"; | |
129 | break; | |
130 | case 0x12: | |
131 | s = "Checksum error"; | |
132 | break; | |
133 | case 0x13: | |
134 | s = "Illegal command"; | |
135 | break; | |
136 | case 0x14: | |
137 | s = "Parameter error"; | |
138 | break; | |
139 | case 0x15: | |
140 | s = "Internal error"; | |
141 | break; | |
142 | case 0x80: | |
143 | s = "Flash erase error"; | |
144 | break; | |
c906108c SS |
145 | default: |
146 | sprintf (buf, "Unknown error code %d", error_code); | |
147 | s = buf; | |
148 | } | |
149 | ||
150 | error (s); | |
151 | } | |
152 | ||
153 | /* Return nonzero if the thread TH is still alive on the remote system. */ | |
154 | ||
155 | int | |
156 | ocd_thread_alive (th) | |
157 | int th; | |
158 | { | |
159 | return 1; | |
160 | } | |
161 | \f | |
162 | /* Clean up connection to a remote debugger. */ | |
163 | ||
164 | /* ARGSUSED */ | |
165 | void | |
166 | ocd_close (quitting) | |
167 | int quitting; | |
168 | { | |
169 | if (ocd_desc) | |
170 | SERIAL_CLOSE (ocd_desc); | |
171 | ocd_desc = NULL; | |
172 | } | |
173 | ||
174 | /* Stub for catch_errors. */ | |
175 | ||
176 | static int | |
177 | ocd_start_remote (dummy) | |
178 | PTR dummy; | |
179 | { | |
180 | unsigned char buf[10], *p; | |
181 | int pktlen; | |
182 | int status; | |
183 | int error_code; | |
184 | int speed; | |
185 | enum ocd_target_type target_type; | |
186 | ||
c5aa993b | 187 | target_type = *(enum ocd_target_type *) dummy; |
c906108c SS |
188 | |
189 | immediate_quit = 1; /* Allow user to interrupt it */ | |
190 | ||
c5aa993b | 191 | SERIAL_SEND_BREAK (ocd_desc); /* Wake up the wiggler */ |
c906108c SS |
192 | |
193 | speed = 80; /* Divide clock by 4000 */ | |
194 | ||
195 | buf[0] = OCD_INIT; | |
196 | buf[1] = speed >> 8; | |
197 | buf[2] = speed & 0xff; | |
198 | buf[3] = target_type; | |
199 | ocd_put_packet (buf, 4); /* Init OCD params */ | |
200 | p = ocd_get_packet (buf[0], &pktlen, remote_timeout); | |
201 | ||
202 | if (pktlen < 2) | |
203 | error ("Truncated response packet from OCD device"); | |
204 | ||
205 | status = p[1]; | |
206 | error_code = p[2]; | |
207 | ||
208 | if (error_code != 0) | |
209 | ocd_error ("OCD_INIT:", error_code); | |
210 | ||
211 | ocd_do_command (OCD_AYT, &status, &pktlen); | |
212 | ||
213 | p = ocd_do_command (OCD_GET_VERSION, &status, &pktlen); | |
214 | ||
215 | printf_unfiltered ("[Wiggler version %x.%x, capability 0x%x]\n", | |
216 | p[0], p[1], (p[2] << 16) | p[3]); | |
217 | ||
218 | #if 0 | |
219 | /* Reset the target */ | |
220 | ||
221 | ocd_do_command (OCD_RESET_RUN, &status, &pktlen); | |
c5aa993b | 222 | /* ocd_do_command (OCD_RESET, &status, &pktlen); */ |
c906108c SS |
223 | #endif |
224 | ||
225 | /* If processor is still running, stop it. */ | |
226 | ||
227 | if (!(status & OCD_FLAG_BDM)) | |
228 | ocd_stop (); | |
229 | ||
230 | #if 1 | |
231 | /* When using a target box, we want to asynchronously return status when | |
232 | target stops. The OCD_SET_CTL_FLAGS command is ignored by Wigglers.dll | |
233 | when using a parallel Wiggler */ | |
234 | buf[0] = OCD_SET_CTL_FLAGS; | |
235 | buf[1] = 0; | |
236 | buf[2] = 1; | |
237 | ocd_put_packet (buf, 3); | |
238 | ||
239 | p = ocd_get_packet (buf[0], &pktlen, remote_timeout); | |
240 | ||
241 | if (pktlen < 2) | |
242 | error ("Truncated response packet from OCD device"); | |
243 | ||
244 | status = p[1]; | |
245 | error_code = p[2]; | |
246 | ||
247 | if (error_code != 0) | |
248 | ocd_error ("OCD_SET_CTL_FLAGS:", error_code); | |
249 | #endif | |
250 | ||
251 | immediate_quit = 0; | |
252 | ||
253 | /* This is really the job of start_remote however, that makes an assumption | |
254 | that the target is about to print out a status message of some sort. That | |
255 | doesn't happen here (in fact, it may not be possible to get the monitor to | |
256 | send the appropriate packet). */ | |
257 | ||
258 | flush_cached_frames (); | |
259 | registers_changed (); | |
260 | stop_pc = read_pc (); | |
261 | set_current_frame (create_new_frame (read_fp (), stop_pc)); | |
262 | select_frame (get_current_frame (), 0); | |
263 | print_stack_frame (selected_frame, -1, 1); | |
264 | ||
265 | buf[0] = OCD_LOG_FILE; | |
c5aa993b | 266 | buf[1] = 3; /* close existing WIGGLERS.LOG */ |
c906108c SS |
267 | ocd_put_packet (buf, 2); |
268 | p = ocd_get_packet (buf[0], &pktlen, remote_timeout); | |
269 | ||
270 | buf[0] = OCD_LOG_FILE; | |
c5aa993b | 271 | buf[1] = 2; /* append to existing WIGGLERS.LOG */ |
c906108c SS |
272 | ocd_put_packet (buf, 2); |
273 | p = ocd_get_packet (buf[0], &pktlen, remote_timeout); | |
274 | ||
275 | return 1; | |
276 | } | |
277 | ||
278 | /* Open a connection to a remote debugger. | |
279 | NAME is the filename used for communication. */ | |
280 | ||
281 | static DCACHE *ocd_dcache; | |
282 | ||
283 | void | |
284 | ocd_open (name, from_tty, target_type, ops) | |
285 | char *name; | |
286 | int from_tty; | |
287 | enum ocd_target_type target_type; | |
288 | struct target_ops *ops; | |
289 | { | |
290 | unsigned char buf[10], *p; | |
c906108c SS |
291 | int pktlen; |
292 | ||
293 | if (name == 0) | |
294 | error ("To open an OCD connection, you need to specify the\n\ | |
295 | device the OCD device is attached to (e.g. /dev/ttya)."); | |
296 | ||
297 | target_preopen (from_tty); | |
298 | ||
299 | current_ops = ops; | |
300 | ||
301 | unpush_target (current_ops); | |
302 | ||
303 | ocd_dcache = dcache_init (ocd_read_bytes, ocd_write_bytes); | |
304 | ||
c5aa993b JM |
305 | if (strncmp (name, "wiggler", 7) == 0) |
306 | { | |
307 | ocd_desc = SERIAL_OPEN ("ocd"); | |
308 | if (!ocd_desc) | |
309 | perror_with_name (name); | |
310 | ||
311 | buf[0] = OCD_LOG_FILE; | |
312 | buf[1] = 1; /* open new or overwrite existing WIGGLERS.LOG */ | |
313 | ocd_put_packet (buf, 2); | |
314 | p = ocd_get_packet (buf[0], &pktlen, remote_timeout); | |
315 | ||
316 | buf[0] = OCD_SET_CONNECTION; | |
317 | buf[1] = 0x01; /* atoi (name[11]); */ | |
318 | ocd_put_packet (buf, 2); | |
319 | p = ocd_get_packet (buf[0], &pktlen, remote_timeout); | |
320 | } | |
321 | else | |
322 | /* not using Wigglers.dll */ | |
323 | { | |
324 | ocd_desc = SERIAL_OPEN (name); | |
325 | if (!ocd_desc) | |
326 | perror_with_name (name); | |
327 | } | |
c906108c SS |
328 | |
329 | if (baud_rate != -1) | |
330 | { | |
331 | if (SERIAL_SETBAUDRATE (ocd_desc, baud_rate)) | |
332 | { | |
333 | SERIAL_CLOSE (ocd_desc); | |
334 | perror_with_name (name); | |
335 | } | |
336 | } | |
337 | ||
338 | SERIAL_RAW (ocd_desc); | |
339 | ||
340 | /* If there is something sitting in the buffer we might take it as a | |
341 | response to a command, which would be bad. */ | |
342 | SERIAL_FLUSH_INPUT (ocd_desc); | |
343 | ||
344 | if (from_tty) | |
345 | { | |
346 | puts_filtered ("Remote target wiggler connected to "); | |
347 | puts_filtered (name); | |
348 | puts_filtered ("\n"); | |
349 | } | |
350 | push_target (current_ops); /* Switch to using remote target now */ | |
351 | ||
352 | /* Without this, some commands which require an active target (such as kill) | |
353 | won't work. This variable serves (at least) double duty as both the pid | |
354 | of the target process (if it has such), and as a flag indicating that a | |
355 | target is active. These functions should be split out into seperate | |
356 | variables, especially since GDB will someday have a notion of debugging | |
357 | several processes. */ | |
358 | ||
359 | inferior_pid = 42000; | |
360 | /* Start the remote connection; if error (0), discard this target. | |
361 | In particular, if the user quits, be sure to discard it | |
362 | (we'd be in an inconsistent state otherwise). */ | |
363 | if (!catch_errors (ocd_start_remote, &target_type, | |
364 | "Couldn't establish connection to remote target\n", | |
365 | RETURN_MASK_ALL)) | |
366 | { | |
c5aa993b | 367 | pop_target (); |
c906108c SS |
368 | error ("Failed to connect to OCD."); |
369 | } | |
370 | } | |
371 | ||
372 | /* This takes a program previously attached to and detaches it. After | |
373 | this is done, GDB can be used to debug some other program. We | |
374 | better not have left any breakpoints in the target program or it'll | |
375 | die when it hits one. */ | |
376 | ||
377 | void | |
378 | ocd_detach (args, from_tty) | |
379 | char *args; | |
380 | int from_tty; | |
381 | { | |
382 | if (args) | |
383 | error ("Argument given to \"detach\" when remotely debugging."); | |
384 | ||
385 | pop_target (); | |
386 | if (from_tty) | |
387 | puts_filtered ("Ending remote debugging.\n"); | |
388 | } | |
389 | \f | |
390 | /* Tell the remote machine to resume. */ | |
391 | ||
392 | void | |
393 | ocd_resume (pid, step, siggnal) | |
394 | int pid, step; | |
395 | enum target_signal siggnal; | |
396 | { | |
397 | int pktlen; | |
398 | ||
399 | dcache_flush (ocd_dcache); | |
400 | ||
401 | if (step) | |
402 | ocd_do_command (OCD_STEP, &last_run_status, &pktlen); | |
403 | else | |
404 | ocd_do_command (OCD_RUN, &last_run_status, &pktlen); | |
405 | } | |
406 | \f | |
407 | void | |
408 | ocd_stop () | |
409 | { | |
410 | int status; | |
411 | int pktlen; | |
412 | ||
413 | ocd_do_command (OCD_STOP, &status, &pktlen); | |
414 | ||
415 | if (!(status & OCD_FLAG_BDM)) | |
416 | error ("Can't stop target via BDM"); | |
417 | } | |
418 | ||
419 | static volatile int ocd_interrupt_flag; | |
420 | ||
421 | /* Send ^C to target to halt it. Target will respond, and send us a | |
422 | packet. */ | |
423 | ||
424 | static void | |
425 | ocd_interrupt (signo) | |
426 | int signo; | |
427 | { | |
428 | /* If this doesn't work, try more severe steps. */ | |
429 | signal (signo, ocd_interrupt_twice); | |
c5aa993b | 430 | |
c906108c SS |
431 | if (remote_debug) |
432 | printf_unfiltered ("ocd_interrupt called\n"); | |
433 | ||
434 | { | |
435 | char buf[1]; | |
436 | ||
437 | ocd_stop (); | |
438 | buf[0] = OCD_AYT; | |
439 | ocd_put_packet (buf, 1); | |
440 | ocd_interrupt_flag = 1; | |
441 | } | |
442 | } | |
443 | ||
c5aa993b | 444 | static void (*ofunc) (); |
c906108c SS |
445 | |
446 | /* The user typed ^C twice. */ | |
447 | static void | |
448 | ocd_interrupt_twice (signo) | |
449 | int signo; | |
450 | { | |
451 | signal (signo, ofunc); | |
c5aa993b | 452 | |
c906108c SS |
453 | interrupt_query (); |
454 | ||
455 | signal (signo, ocd_interrupt); | |
456 | } | |
457 | ||
458 | /* Ask the user what to do when an interrupt is received. */ | |
459 | ||
460 | static void | |
461 | interrupt_query () | |
462 | { | |
463 | target_terminal_ours (); | |
464 | ||
465 | if (query ("Interrupted while waiting for the program.\n\ | |
466 | Give up (and stop debugging it)? ")) | |
467 | { | |
468 | target_mourn_inferior (); | |
469 | return_to_top_level (RETURN_QUIT); | |
470 | } | |
471 | ||
472 | target_terminal_inferior (); | |
473 | } | |
474 | ||
475 | /* If nonzero, ignore the next kill. */ | |
476 | static int kill_kludge; | |
477 | ||
478 | /* Wait until the remote machine stops, then return, | |
479 | storing status in STATUS just as `wait' would. | |
480 | Returns "pid" (though it's not clear what, if anything, that | |
481 | means in the case of this target). */ | |
482 | ||
483 | int | |
484 | ocd_wait () | |
485 | { | |
486 | unsigned char *p; | |
487 | int error_code; | |
488 | int pktlen; | |
489 | char buf[1]; | |
490 | ||
491 | ocd_interrupt_flag = 0; | |
492 | ||
493 | /* Target might already be stopped by the time we get here. */ | |
494 | /* If we aren't already stopped, we need to loop until we've dropped | |
495 | back into BDM mode */ | |
496 | ||
497 | while (!(last_run_status & OCD_FLAG_BDM)) | |
498 | { | |
499 | buf[0] = OCD_AYT; | |
500 | ocd_put_packet (buf, 1); | |
501 | p = ocd_get_packet (OCD_AYT, &pktlen, -1); | |
502 | ||
503 | ofunc = (void (*)()) signal (SIGINT, ocd_interrupt); | |
504 | signal (SIGINT, ofunc); | |
505 | ||
506 | if (pktlen < 2) | |
507 | error ("Truncated response packet from OCD device"); | |
508 | ||
509 | last_run_status = p[1]; | |
510 | error_code = p[2]; | |
511 | ||
512 | if (error_code != 0) | |
513 | ocd_error ("target_wait:", error_code); | |
514 | ||
515 | if (last_run_status & OCD_FLAG_PWF) | |
516 | error ("OCD device lost VCC at BDM interface."); | |
517 | else if (last_run_status & OCD_FLAG_CABLE_DISC) | |
518 | error ("OCD device cable appears to have been disconnected."); | |
519 | } | |
520 | ||
521 | if (ocd_interrupt_flag) | |
522 | return 1; | |
523 | else | |
524 | return 0; | |
525 | } | |
526 | ||
527 | /* Read registers from the OCD device. Specify the starting and ending | |
528 | register number. Return the number of regs actually read in *NUMREGS. | |
529 | Returns a pointer to a static array containing the register contents. */ | |
530 | ||
531 | unsigned char * | |
532 | ocd_read_bdm_registers (first_bdm_regno, last_bdm_regno, reglen) | |
533 | int first_bdm_regno; | |
534 | int last_bdm_regno; | |
535 | int *reglen; | |
536 | { | |
537 | unsigned char buf[10]; | |
538 | int i; | |
539 | unsigned char *p; | |
540 | unsigned char *regs; | |
541 | int error_code, status; | |
542 | int pktlen; | |
543 | ||
544 | buf[0] = OCD_READ_REGS; | |
545 | buf[1] = first_bdm_regno >> 8; | |
546 | buf[2] = first_bdm_regno & 0xff; | |
547 | buf[3] = last_bdm_regno >> 8; | |
548 | buf[4] = last_bdm_regno & 0xff; | |
549 | ||
550 | ocd_put_packet (buf, 5); | |
551 | p = ocd_get_packet (OCD_READ_REGS, &pktlen, remote_timeout); | |
552 | ||
553 | status = p[1]; | |
554 | error_code = p[2]; | |
555 | ||
556 | if (error_code != 0) | |
557 | ocd_error ("read_bdm_registers:", error_code); | |
558 | ||
559 | i = p[3]; | |
560 | if (i == 0) | |
561 | i = 256; | |
562 | ||
563 | if (i > pktlen - 4 | |
564 | || ((i & 3) != 0)) | |
565 | error ("Register block size bad: %d", i); | |
566 | ||
567 | *reglen = i; | |
568 | ||
569 | regs = p + 4; | |
570 | ||
571 | return regs; | |
572 | } | |
573 | ||
574 | /* Read register BDM_REGNO and returns its value ala read_register() */ | |
575 | ||
576 | CORE_ADDR | |
577 | ocd_read_bdm_register (bdm_regno) | |
578 | int bdm_regno; | |
579 | { | |
580 | int reglen; | |
581 | unsigned char *p; | |
582 | CORE_ADDR regval; | |
583 | ||
584 | p = ocd_read_bdm_registers (bdm_regno, bdm_regno, ®len); | |
585 | regval = extract_unsigned_integer (p, reglen); | |
586 | ||
587 | return regval; | |
588 | } | |
589 | ||
590 | void | |
591 | ocd_write_bdm_registers (first_bdm_regno, regptr, reglen) | |
592 | int first_bdm_regno; | |
593 | unsigned char *regptr; | |
594 | int reglen; | |
595 | { | |
596 | unsigned char *buf; | |
597 | unsigned char *p; | |
598 | int error_code, status; | |
599 | int pktlen; | |
600 | ||
601 | buf = alloca (4 + reglen); | |
602 | ||
603 | buf[0] = OCD_WRITE_REGS; | |
604 | buf[1] = first_bdm_regno >> 8; | |
605 | buf[2] = first_bdm_regno & 0xff; | |
606 | buf[3] = reglen; | |
607 | memcpy (buf + 4, regptr, reglen); | |
608 | ||
609 | ocd_put_packet (buf, 4 + reglen); | |
610 | p = ocd_get_packet (OCD_WRITE_REGS, &pktlen, remote_timeout); | |
611 | ||
612 | if (pktlen < 3) | |
613 | error ("Truncated response packet from OCD device"); | |
614 | ||
615 | status = p[1]; | |
616 | error_code = p[2]; | |
617 | ||
618 | if (error_code != 0) | |
619 | ocd_error ("ocd_write_bdm_registers:", error_code); | |
620 | } | |
621 | ||
622 | void | |
623 | ocd_write_bdm_register (bdm_regno, reg) | |
624 | int bdm_regno; | |
625 | CORE_ADDR reg; | |
626 | { | |
627 | unsigned char buf[4]; | |
628 | ||
629 | store_unsigned_integer (buf, 4, reg); | |
630 | ||
631 | ocd_write_bdm_registers (bdm_regno, buf, 4); | |
632 | } | |
633 | \f | |
c5aa993b | 634 | void |
c906108c SS |
635 | ocd_prepare_to_store () |
636 | { | |
637 | } | |
638 | \f | |
639 | /* Write memory data directly to the remote machine. | |
640 | This does not inform the data cache; the data cache uses this. | |
641 | MEMADDR is the address in the remote memory space. | |
642 | MYADDR is the address of the buffer in our space. | |
643 | LEN is the number of bytes. | |
644 | ||
645 | Returns number of bytes transferred, or 0 for error. */ | |
646 | ||
647 | static int write_mem_command = OCD_WRITE_MEM; | |
648 | ||
649 | int | |
650 | ocd_write_bytes (memaddr, myaddr, len) | |
651 | CORE_ADDR memaddr; | |
652 | char *myaddr; | |
653 | int len; | |
654 | { | |
655 | char buf[256 + 10]; | |
656 | unsigned char *p; | |
657 | int origlen; | |
658 | ||
659 | origlen = len; | |
660 | ||
661 | buf[0] = write_mem_command; | |
662 | buf[5] = 1; /* Write as bytes */ | |
663 | buf[6] = 0; /* Don't verify */ | |
664 | ||
665 | while (len > 0) | |
666 | { | |
667 | int numbytes; | |
668 | int pktlen; | |
669 | int status, error_code; | |
670 | ||
671 | numbytes = min (len, 256 - 8); | |
672 | ||
673 | buf[1] = memaddr >> 24; | |
674 | buf[2] = memaddr >> 16; | |
675 | buf[3] = memaddr >> 8; | |
676 | buf[4] = memaddr; | |
677 | ||
678 | buf[7] = numbytes; | |
679 | ||
680 | memcpy (&buf[8], myaddr, numbytes); | |
681 | ocd_put_packet (buf, 8 + numbytes); | |
682 | p = ocd_get_packet (OCD_WRITE_MEM, &pktlen, remote_timeout); | |
683 | if (pktlen < 3) | |
684 | error ("Truncated response packet from OCD device"); | |
685 | ||
686 | status = p[1]; | |
687 | error_code = p[2]; | |
688 | ||
689 | if (error_code == 0x11) /* Got a bus error? */ | |
690 | { | |
691 | CORE_ADDR error_address; | |
692 | ||
693 | error_address = p[3] << 24; | |
694 | error_address |= p[4] << 16; | |
695 | error_address |= p[5] << 8; | |
696 | error_address |= p[6]; | |
697 | numbytes = error_address - memaddr; | |
698 | ||
699 | len -= numbytes; | |
700 | ||
701 | errno = EIO; | |
702 | ||
703 | break; | |
704 | } | |
705 | else if (error_code != 0) | |
706 | ocd_error ("ocd_write_bytes:", error_code); | |
707 | ||
708 | len -= numbytes; | |
709 | memaddr += numbytes; | |
710 | myaddr += numbytes; | |
711 | } | |
712 | ||
713 | return origlen - len; | |
714 | } | |
715 | ||
716 | /* Read memory data directly from the remote machine. | |
717 | This does not use the data cache; the data cache uses this. | |
718 | MEMADDR is the address in the remote memory space. | |
719 | MYADDR is the address of the buffer in our space. | |
720 | LEN is the number of bytes. | |
721 | ||
722 | Returns number of bytes transferred, or 0 for error. */ | |
723 | ||
724 | static int | |
725 | ocd_read_bytes (memaddr, myaddr, len) | |
726 | CORE_ADDR memaddr; | |
727 | char *myaddr; | |
728 | int len; | |
729 | { | |
730 | char buf[256 + 10]; | |
731 | unsigned char *p; | |
732 | int origlen; | |
733 | ||
734 | origlen = len; | |
735 | ||
736 | buf[0] = OCD_READ_MEM; | |
737 | buf[5] = 1; /* Read as bytes */ | |
738 | ||
739 | while (len > 0) | |
740 | { | |
741 | int numbytes; | |
742 | int pktlen; | |
743 | int status, error_code; | |
744 | ||
745 | numbytes = min (len, 256 - 7); | |
746 | ||
747 | buf[1] = memaddr >> 24; | |
748 | buf[2] = memaddr >> 16; | |
749 | buf[3] = memaddr >> 8; | |
750 | buf[4] = memaddr; | |
751 | ||
752 | buf[6] = numbytes; | |
753 | ||
754 | ocd_put_packet (buf, 7); | |
755 | p = ocd_get_packet (OCD_READ_MEM, &pktlen, remote_timeout); | |
756 | if (pktlen < 4) | |
757 | error ("Truncated response packet from OCD device"); | |
758 | ||
759 | status = p[1]; | |
760 | error_code = p[2]; | |
761 | ||
762 | if (error_code == 0x11) /* Got a bus error? */ | |
763 | { | |
764 | CORE_ADDR error_address; | |
765 | ||
766 | error_address = p[3] << 24; | |
767 | error_address |= p[4] << 16; | |
768 | error_address |= p[5] << 8; | |
769 | error_address |= p[6]; | |
770 | numbytes = error_address - memaddr; | |
771 | ||
772 | len -= numbytes; | |
773 | ||
774 | errno = EIO; | |
775 | ||
776 | break; | |
777 | } | |
778 | else if (error_code != 0) | |
779 | ocd_error ("ocd_read_bytes:", error_code); | |
780 | ||
781 | memcpy (myaddr, &p[4], numbytes); | |
782 | ||
783 | len -= numbytes; | |
784 | memaddr += numbytes; | |
785 | myaddr += numbytes; | |
786 | } | |
787 | ||
788 | return origlen - len; | |
789 | } | |
790 | \f | |
791 | /* Read or write LEN bytes from inferior memory at MEMADDR, transferring | |
792 | to or from debugger address MYADDR. Write to inferior if SHOULD_WRITE is | |
793 | nonzero. Returns length of data written or read; 0 for error. */ | |
794 | ||
795 | /* ARGSUSED */ | |
796 | int | |
797 | ocd_xfer_memory (memaddr, myaddr, len, should_write, target) | |
798 | CORE_ADDR memaddr; | |
799 | char *myaddr; | |
800 | int len; | |
801 | int should_write; | |
c5aa993b | 802 | struct target_ops *target; /* ignored */ |
c906108c SS |
803 | { |
804 | return dcache_xfer_memory (ocd_dcache, memaddr, myaddr, len, should_write); | |
805 | } | |
806 | \f | |
807 | void | |
808 | ocd_files_info (ignore) | |
809 | struct target_ops *ignore; | |
810 | { | |
811 | puts_filtered ("Debugging a target over a serial line.\n"); | |
812 | } | |
813 | \f | |
814 | /* Stuff for dealing with the packets which are part of this protocol. | |
815 | See comment at top of file for details. */ | |
816 | ||
817 | /* Read a single character from the remote side, handling wierd errors. */ | |
818 | ||
819 | static int | |
820 | readchar (timeout) | |
821 | int timeout; | |
822 | { | |
823 | int ch; | |
824 | ||
825 | ch = SERIAL_READCHAR (ocd_desc, timeout); | |
826 | ||
827 | switch (ch) | |
828 | { | |
829 | case SERIAL_EOF: | |
830 | error ("Remote connection closed"); | |
831 | case SERIAL_ERROR: | |
832 | perror_with_name ("Remote communication error"); | |
833 | case SERIAL_TIMEOUT: | |
834 | default: | |
835 | return ch; | |
836 | } | |
837 | } | |
838 | ||
839 | #if 0 | |
840 | /* Read a character from the data stream, dequoting as necessary. SYN is | |
841 | treated special. Any SYNs appearing in the data stream are returned as the | |
842 | distinct value RAW_SYN (which has a value > 8 bits and therefore cannot be | |
843 | mistaken for real data). */ | |
844 | ||
845 | static int | |
846 | get_quoted_char (timeout) | |
847 | int timeout; | |
848 | { | |
849 | int ch; | |
850 | ||
851 | ch = readchar (timeout); | |
852 | ||
853 | switch (ch) | |
854 | { | |
855 | case SERIAL_TIMEOUT: | |
856 | error ("Timeout in mid-packet, aborting"); | |
857 | case SYN: | |
858 | return RAW_SYN; | |
859 | case DLE: | |
860 | ch = readchar (timeout); | |
861 | if (ch == SYN) | |
862 | return RAW_SYN; | |
863 | return ch & ~0100; | |
864 | default: | |
865 | return ch; | |
866 | } | |
867 | } | |
868 | ||
c5aa993b | 869 | static unsigned char pkt[256 * 2 + 10], *pktp; /* Worst case */ |
c906108c SS |
870 | |
871 | static void | |
872 | reset_packet () | |
873 | { | |
874 | pktp = pkt; | |
875 | } | |
876 | ||
877 | static void | |
878 | output_packet () | |
879 | { | |
880 | if (SERIAL_WRITE (ocd_desc, pkt, pktp - pkt)) | |
881 | perror_with_name ("output_packet: write failed"); | |
882 | ||
883 | reset_packet (); | |
884 | } | |
885 | ||
886 | /* Output a quoted character. SYNs and DLEs are quoted. Everything else goes | |
887 | through untouched. */ | |
888 | ||
889 | static void | |
890 | put_quoted_char (c) | |
891 | int c; | |
892 | { | |
893 | switch (c) | |
894 | { | |
895 | case SYN: | |
896 | case DLE: | |
897 | *pktp++ = DLE; | |
898 | c |= 0100; | |
899 | } | |
900 | ||
901 | *pktp++ = c; | |
902 | } | |
903 | ||
904 | /* Send a packet to the OCD device. The packet framed by a SYN character, | |
905 | a byte count and a checksum. The byte count only counts the number of | |
906 | bytes between the count and the checksum. A count of zero actually | |
907 | means 256. Any SYNs within the packet (including the checksum and | |
908 | count) must be quoted. The quote character must be quoted as well. | |
909 | Quoting is done by replacing the character with the two-character sequence | |
910 | DLE, {char} | 0100. Note that the quoting mechanism has no effect on the | |
911 | byte count. */ | |
912 | ||
913 | static void | |
914 | stu_put_packet (buf, len) | |
915 | unsigned char *buf; | |
916 | int len; | |
917 | { | |
918 | unsigned char checksum; | |
919 | unsigned char c; | |
920 | ||
921 | if (len == 0 || len > 256) | |
922 | abort (); /* Can't represent 0 length packet */ | |
923 | ||
924 | reset_packet (); | |
925 | ||
926 | checksum = 0; | |
927 | ||
928 | put_quoted_char (RAW_SYN); | |
929 | ||
930 | c = len; | |
931 | ||
932 | do | |
933 | { | |
934 | checksum += c; | |
935 | ||
936 | put_quoted_char (c); | |
937 | ||
938 | c = *buf++; | |
939 | } | |
940 | while (len-- > 0); | |
941 | ||
942 | put_quoted_char (-checksum & 0xff); | |
943 | ||
944 | output_packet (); | |
945 | } | |
946 | ||
947 | #else | |
948 | ||
949 | /* Send a packet to the OCD device. The packet framed by a SYN character, | |
950 | a byte count and a checksum. The byte count only counts the number of | |
951 | bytes between the count and the checksum. A count of zero actually | |
952 | means 256. Any SYNs within the packet (including the checksum and | |
953 | count) must be quoted. The quote character must be quoted as well. | |
954 | Quoting is done by replacing the character with the two-character sequence | |
955 | DLE, {char} | 0100. Note that the quoting mechanism has no effect on the | |
956 | byte count. */ | |
957 | ||
958 | static void | |
959 | ocd_put_packet (buf, len) | |
960 | unsigned char *buf; | |
961 | int len; | |
962 | { | |
963 | unsigned char checksum; | |
964 | unsigned char c; | |
965 | unsigned char *packet, *packet_ptr; | |
966 | ||
c5aa993b | 967 | packet = alloca (len + 1 + 1); /* packet + SYN + checksum */ |
c906108c SS |
968 | packet_ptr = packet; |
969 | ||
970 | checksum = 0; | |
971 | ||
972 | *packet_ptr++ = 0x55; | |
973 | ||
974 | while (len-- > 0) | |
975 | { | |
976 | c = *buf++; | |
977 | ||
978 | checksum += c; | |
979 | *packet_ptr++ = c; | |
980 | } | |
981 | ||
982 | *packet_ptr++ = -checksum; | |
983 | if (SERIAL_WRITE (ocd_desc, packet, packet_ptr - packet)) | |
984 | perror_with_name ("output_packet: write failed"); | |
985 | } | |
986 | #endif | |
987 | ||
988 | #if 0 | |
989 | /* Get a packet from the OCD device. Timeout is only enforced for the | |
990 | first byte of the packet. Subsequent bytes are expected to arrive in | |
991 | time <= remote_timeout. Returns a pointer to a static buffer containing | |
992 | the payload of the packet. *LENP contains the length of the packet. | |
c5aa993b | 993 | */ |
c906108c SS |
994 | |
995 | static unsigned char * | |
996 | stu_get_packet (cmd, lenp, timeout) | |
997 | unsigned char cmd; | |
998 | int *lenp; | |
999 | { | |
1000 | int ch; | |
1001 | int len; | |
1002 | static unsigned char buf[256 + 10], *p; | |
1003 | unsigned char checksum; | |
1004 | ||
c5aa993b | 1005 | find_packet: |
c906108c SS |
1006 | |
1007 | ch = get_quoted_char (timeout); | |
1008 | ||
1009 | if (ch < 0) | |
1010 | error ("get_packet (readchar): %d", ch); | |
1011 | ||
1012 | if (ch != RAW_SYN) | |
1013 | goto find_packet; | |
1014 | ||
c5aa993b | 1015 | found_syn: /* Found the start of a packet */ |
c906108c SS |
1016 | |
1017 | p = buf; | |
1018 | checksum = 0; | |
1019 | ||
1020 | len = get_quoted_char (remote_timeout); | |
1021 | ||
1022 | if (len == RAW_SYN) | |
1023 | goto found_syn; | |
1024 | ||
1025 | checksum += len; | |
1026 | ||
1027 | if (len == 0) | |
1028 | len = 256; | |
1029 | ||
1030 | len++; /* Include checksum */ | |
1031 | ||
1032 | while (len-- > 0) | |
1033 | { | |
1034 | ch = get_quoted_char (remote_timeout); | |
1035 | if (ch == RAW_SYN) | |
1036 | goto found_syn; | |
1037 | ||
1038 | *p++ = ch; | |
1039 | checksum += ch; | |
1040 | } | |
1041 | ||
1042 | if (checksum != 0) | |
1043 | goto find_packet; | |
1044 | ||
1045 | if (cmd != buf[0]) | |
1046 | error ("Response phase error. Got 0x%x, expected 0x%x", buf[0], cmd); | |
1047 | ||
1048 | *lenp = p - buf - 1; | |
1049 | return buf; | |
1050 | } | |
1051 | ||
1052 | #else | |
1053 | ||
1054 | /* Get a packet from the OCD device. Timeout is only enforced for the | |
1055 | first byte of the packet. Subsequent bytes are expected to arrive in | |
1056 | time <= remote_timeout. Returns a pointer to a static buffer containing | |
1057 | the payload of the packet. *LENP contains the length of the packet. | |
c5aa993b | 1058 | */ |
c906108c SS |
1059 | |
1060 | static unsigned char * | |
1061 | ocd_get_packet (cmd, lenp, timeout) | |
1062 | int cmd; | |
1063 | int *lenp; | |
1064 | { | |
1065 | int ch; | |
1066 | int len; | |
c906108c SS |
1067 | static unsigned char packet[512]; |
1068 | unsigned char *packet_ptr; | |
1069 | unsigned char checksum; | |
1070 | ||
1071 | ch = readchar (timeout); | |
1072 | ||
1073 | if (ch < 0) | |
1074 | error ("ocd_get_packet (readchar): %d", ch); | |
1075 | ||
1076 | if (ch != 0x55) | |
1077 | error ("ocd_get_packet (readchar): %d", ch); | |
1078 | ||
1079 | /* Found the start of a packet */ | |
1080 | ||
1081 | packet_ptr = packet; | |
1082 | checksum = 0; | |
1083 | ||
1084 | /* Read command char. That sort of tells us how long the packet is. */ | |
1085 | ||
1086 | ch = readchar (timeout); | |
1087 | ||
1088 | if (ch < 0) | |
1089 | error ("ocd_get_packet (readchar): %d", ch); | |
1090 | ||
1091 | *packet_ptr++ = ch; | |
1092 | checksum += ch; | |
1093 | ||
1094 | /* Get status. */ | |
1095 | ||
1096 | ch = readchar (timeout); | |
1097 | ||
1098 | if (ch < 0) | |
1099 | error ("ocd_get_packet (readchar): %d", ch); | |
1100 | *packet_ptr++ = ch; | |
1101 | checksum += ch; | |
1102 | ||
1103 | /* Get error code. */ | |
1104 | ||
1105 | ch = readchar (timeout); | |
1106 | ||
1107 | if (ch < 0) | |
1108 | error ("ocd_get_packet (readchar): %d", ch); | |
1109 | *packet_ptr++ = ch; | |
1110 | checksum += ch; | |
1111 | ||
1112 | switch (ch) /* Figure out length of packet */ | |
1113 | { | |
1114 | case 0x7: /* Write verify error? */ | |
1115 | len = 8; /* write address, value read back */ | |
1116 | break; | |
1117 | case 0x11: /* Bus error? */ | |
c5aa993b | 1118 | /* write address, read flag */ |
c906108c SS |
1119 | case 0x15: /* Internal error */ |
1120 | len = 5; /* error code, vector */ | |
1121 | break; | |
1122 | default: /* Error w/no params */ | |
1123 | len = 0; | |
1124 | break; | |
1125 | case 0x0: /* Normal result */ | |
1126 | switch (packet[0]) | |
1127 | { | |
c5aa993b JM |
1128 | case OCD_AYT: /* Are You There? */ |
1129 | case OCD_SET_BAUD_RATE: /* Set Baud Rate */ | |
1130 | case OCD_INIT: /* Initialize OCD device */ | |
c906108c | 1131 | case OCD_SET_SPEED: /* Set Speed */ |
c5aa993b JM |
1132 | case OCD_SET_FUNC_CODE: /* Set Function Code */ |
1133 | case OCD_SET_CTL_FLAGS: /* Set Control Flags */ | |
1134 | case OCD_SET_BUF_ADDR: /* Set Register Buffer Address */ | |
1135 | case OCD_RUN: /* Run Target from PC */ | |
c906108c | 1136 | case OCD_RUN_ADDR: /* Run Target from Specified Address */ |
c5aa993b | 1137 | case OCD_STOP: /* Stop Target */ |
c906108c SS |
1138 | case OCD_RESET_RUN: /* Reset Target and Run */ |
1139 | case OCD_RESET: /* Reset Target and Halt */ | |
c5aa993b JM |
1140 | case OCD_STEP: /* Single Step */ |
1141 | case OCD_WRITE_REGS: /* Write Register */ | |
c906108c SS |
1142 | case OCD_WRITE_MEM: /* Write Memory */ |
1143 | case OCD_FILL_MEM: /* Fill Memory */ | |
1144 | case OCD_MOVE_MEM: /* Move Memory */ | |
c5aa993b JM |
1145 | case OCD_WRITE_INT_MEM: /* Write Internal Memory */ |
1146 | case OCD_JUMP: /* Jump to Subroutine */ | |
1147 | case OCD_ERASE_FLASH: /* Erase flash memory */ | |
1148 | case OCD_PROGRAM_FLASH: /* Write flash memory */ | |
c906108c SS |
1149 | case OCD_EXIT_MON: /* Exit the flash programming monitor */ |
1150 | case OCD_ENTER_MON: /* Enter the flash programming monitor */ | |
1151 | case OCD_LOG_FILE: /* Make Wigglers.dll save Wigglers.log */ | |
c5aa993b | 1152 | case OCD_SET_CONNECTION: /* Set type of connection in Wigglers.dll */ |
c906108c SS |
1153 | len = 0; |
1154 | break; | |
c5aa993b | 1155 | case OCD_GET_VERSION: /* Get Version */ |
c906108c SS |
1156 | len = 10; |
1157 | break; | |
c5aa993b | 1158 | case OCD_GET_STATUS_MASK: /* Get Status Mask */ |
c906108c SS |
1159 | len = 1; |
1160 | break; | |
1161 | case OCD_GET_CTRS: /* Get Error Counters */ | |
1162 | case OCD_READ_REGS: /* Read Register */ | |
1163 | case OCD_READ_MEM: /* Read Memory */ | |
c5aa993b | 1164 | case OCD_READ_INT_MEM: /* Read Internal Memory */ |
c906108c SS |
1165 | len = 257; |
1166 | break; | |
1167 | default: | |
1168 | error ("ocd_get_packet: unknown packet type 0x%x\n", ch); | |
1169 | } | |
1170 | } | |
1171 | ||
1172 | if (len == 257) /* Byte stream? */ | |
1173 | { /* Yes, byte streams contain the length */ | |
1174 | ch = readchar (timeout); | |
1175 | ||
1176 | if (ch < 0) | |
1177 | error ("ocd_get_packet (readchar): %d", ch); | |
1178 | *packet_ptr++ = ch; | |
1179 | checksum += ch; | |
1180 | len = ch; | |
1181 | if (len == 0) | |
1182 | len = 256; | |
1183 | } | |
1184 | ||
1185 | while (len-- >= 0) /* Do rest of packet and checksum */ | |
1186 | { | |
1187 | ch = readchar (timeout); | |
1188 | ||
1189 | if (ch < 0) | |
1190 | error ("ocd_get_packet (readchar): %d", ch); | |
1191 | *packet_ptr++ = ch; | |
1192 | checksum += ch; | |
1193 | } | |
1194 | ||
1195 | if (checksum != 0) | |
1196 | error ("ocd_get_packet: bad packet checksum"); | |
1197 | ||
1198 | if (cmd != -1 && cmd != packet[0]) | |
1199 | error ("Response phase error. Got 0x%x, expected 0x%x", packet[0], cmd); | |
1200 | ||
c5aa993b | 1201 | *lenp = packet_ptr - packet - 1; /* Subtract checksum byte */ |
c906108c SS |
1202 | return packet; |
1203 | } | |
1204 | #endif | |
1205 | ||
1206 | /* Execute a simple (one-byte) command. Returns a pointer to the data | |
1207 | following the error code. */ | |
1208 | ||
1209 | static unsigned char * | |
1210 | ocd_do_command (cmd, statusp, lenp) | |
1211 | int cmd; | |
1212 | int *statusp; | |
1213 | int *lenp; | |
1214 | { | |
1215 | unsigned char buf[100], *p; | |
1216 | int status, error_code; | |
1217 | char errbuf[100]; | |
1218 | ||
1219 | unsigned char logbuf[100]; | |
1220 | int logpktlen; | |
1221 | ||
1222 | buf[0] = cmd; | |
c5aa993b | 1223 | ocd_put_packet (buf, 1); /* Send command */ |
c906108c SS |
1224 | p = ocd_get_packet (*buf, lenp, remote_timeout); |
1225 | ||
1226 | if (*lenp < 3) | |
1227 | error ("Truncated response packet from OCD device"); | |
1228 | ||
1229 | status = p[1]; | |
1230 | error_code = p[2]; | |
1231 | ||
1232 | if (error_code != 0) | |
1233 | { | |
1234 | sprintf (errbuf, "ocd_do_command (0x%x):", cmd); | |
1235 | ocd_error (errbuf, error_code); | |
1236 | } | |
1237 | ||
1238 | if (status & OCD_FLAG_PWF) | |
1239 | error ("OCD device can't detect VCC at BDM interface."); | |
1240 | else if (status & OCD_FLAG_CABLE_DISC) | |
1241 | error ("BDM cable appears to be disconnected."); | |
1242 | ||
1243 | *statusp = status; | |
1244 | ||
1245 | logbuf[0] = OCD_LOG_FILE; | |
c5aa993b | 1246 | logbuf[1] = 3; /* close existing WIGGLERS.LOG */ |
c906108c SS |
1247 | ocd_put_packet (logbuf, 2); |
1248 | ocd_get_packet (logbuf[0], &logpktlen, remote_timeout); | |
1249 | ||
1250 | logbuf[0] = OCD_LOG_FILE; | |
c5aa993b | 1251 | logbuf[1] = 2; /* append to existing WIGGLERS.LOG */ |
c906108c SS |
1252 | ocd_put_packet (logbuf, 2); |
1253 | ocd_get_packet (logbuf[0], &logpktlen, remote_timeout); | |
1254 | ||
1255 | return p + 3; | |
1256 | } | |
1257 | \f | |
1258 | void | |
1259 | ocd_kill () | |
1260 | { | |
1261 | /* For some mysterious reason, wait_for_inferior calls kill instead of | |
1262 | mourn after it gets TARGET_WAITKIND_SIGNALLED. Work around it. */ | |
1263 | if (kill_kludge) | |
1264 | { | |
1265 | kill_kludge = 0; | |
1266 | target_mourn_inferior (); | |
1267 | return; | |
1268 | } | |
1269 | ||
1270 | /* Don't wait for it to die. I'm not really sure it matters whether | |
1271 | we do or not. */ | |
1272 | target_mourn_inferior (); | |
1273 | } | |
1274 | ||
1275 | void | |
1276 | ocd_mourn () | |
1277 | { | |
1278 | unpush_target (current_ops); | |
1279 | generic_mourn_inferior (); | |
1280 | } | |
1281 | ||
1282 | /* All we actually do is set the PC to the start address of exec_bfd, and start | |
1283 | the program at that point. */ | |
1284 | ||
1285 | void | |
1286 | ocd_create_inferior (exec_file, args, env) | |
1287 | char *exec_file; | |
1288 | char *args; | |
1289 | char **env; | |
1290 | { | |
1291 | if (args && (*args != '\000')) | |
1292 | error ("Args are not supported by BDM."); | |
1293 | ||
1294 | clear_proceed_status (); | |
1295 | proceed (bfd_get_start_address (exec_bfd), TARGET_SIGNAL_0, 0); | |
1296 | } | |
1297 | ||
1298 | void | |
1299 | ocd_load (args, from_tty) | |
1300 | char *args; | |
1301 | int from_tty; | |
1302 | { | |
1303 | generic_load (args, from_tty); | |
1304 | ||
1305 | inferior_pid = 0; | |
1306 | ||
1307 | /* This is necessary because many things were based on the PC at the time that | |
1308 | we attached to the monitor, which is no longer valid now that we have loaded | |
1309 | new code (and just changed the PC). Another way to do this might be to call | |
1310 | normal_stop, except that the stack may not be valid, and things would get | |
1311 | horribly confused... */ | |
1312 | ||
1313 | clear_symtab_users (); | |
1314 | } | |
1315 | ||
1316 | /* This should be defined for each target */ | |
1317 | /* But we want to be able to compile this file for some configurations | |
1318 | not yet supported fully */ | |
c5aa993b JM |
1319 | |
1320 | #define BDM_BREAKPOINT {0x0,0x0,0x0,0x0} /* For ppc 8xx */ | |
c906108c | 1321 | #if 0 |
c5aa993b | 1322 | #define BDM_BREAKPOINT {0x4a,0xfa} /* BGND insn used for CPU32 */ |
c906108c SS |
1323 | #endif |
1324 | ||
1325 | /* BDM (at least on CPU32) uses a different breakpoint */ | |
1326 | ||
1327 | int | |
1328 | ocd_insert_breakpoint (addr, contents_cache) | |
1329 | CORE_ADDR addr; | |
1330 | char *contents_cache; | |
1331 | { | |
1332 | static char break_insn[] = BDM_BREAKPOINT; | |
1333 | int val; | |
1334 | ||
1335 | val = target_read_memory (addr, contents_cache, sizeof (break_insn)); | |
1336 | ||
1337 | if (val == 0) | |
1338 | val = target_write_memory (addr, break_insn, sizeof (break_insn)); | |
1339 | ||
1340 | return val; | |
1341 | } | |
1342 | ||
1343 | int | |
1344 | ocd_remove_breakpoint (addr, contents_cache) | |
1345 | CORE_ADDR addr; | |
1346 | char *contents_cache; | |
1347 | { | |
1348 | static char break_insn[] = BDM_BREAKPOINT; | |
1349 | int val; | |
1350 | ||
1351 | val = target_write_memory (addr, contents_cache, sizeof (break_insn)); | |
1352 | ||
1353 | return val; | |
1354 | } | |
1355 | ||
1356 | static void | |
1357 | bdm_command (args, from_tty) | |
1358 | char *args; | |
1359 | int from_tty; | |
1360 | { | |
1361 | error ("bdm command must be followed by `reset'"); | |
1362 | } | |
1363 | ||
1364 | static void | |
1365 | bdm_reset_command (args, from_tty) | |
1366 | char *args; | |
1367 | int from_tty; | |
1368 | { | |
1369 | int status, pktlen; | |
1370 | ||
1371 | if (!ocd_desc) | |
1372 | error ("Not connected to OCD device."); | |
1373 | ||
1374 | ocd_do_command (OCD_RESET, &status, &pktlen); | |
1375 | dcache_flush (ocd_dcache); | |
1376 | registers_changed (); | |
1377 | } | |
1378 | ||
1379 | static void | |
1380 | bdm_restart_command (args, from_tty) | |
1381 | char *args; | |
1382 | int from_tty; | |
1383 | { | |
1384 | int status, pktlen; | |
1385 | ||
1386 | if (!ocd_desc) | |
1387 | error ("Not connected to OCD device."); | |
1388 | ||
1389 | ocd_do_command (OCD_RESET_RUN, &status, &pktlen); | |
1390 | last_run_status = status; | |
1391 | clear_proceed_status (); | |
1392 | wait_for_inferior (); | |
1393 | normal_stop (); | |
1394 | } | |
1395 | ||
1396 | /* Temporary replacement for target_store_registers(). This prevents | |
1397 | generic_load from trying to set the PC. */ | |
1398 | ||
1399 | static void | |
1400 | noop_store_registers (regno) | |
1401 | int regno; | |
1402 | { | |
1403 | } | |
1404 | ||
1405 | static void | |
1406 | bdm_update_flash_command (args, from_tty) | |
1407 | char *args; | |
1408 | int from_tty; | |
1409 | { | |
1410 | int status, pktlen; | |
d4f3574e | 1411 | struct cleanup *old_chain; |
507f3c78 | 1412 | void (*store_registers_tmp) (int); |
c906108c SS |
1413 | |
1414 | if (!ocd_desc) | |
1415 | error ("Not connected to OCD device."); | |
1416 | ||
1417 | if (!args) | |
1418 | error ("Must specify file containing new OCD code."); | |
1419 | ||
c5aa993b | 1420 | /* old_chain = make_cleanup (flash_cleanup, 0); */ |
c906108c SS |
1421 | |
1422 | ocd_do_command (OCD_ENTER_MON, &status, &pktlen); | |
1423 | ||
1424 | ocd_do_command (OCD_ERASE_FLASH, &status, &pktlen); | |
1425 | ||
1426 | write_mem_command = OCD_PROGRAM_FLASH; | |
1427 | store_registers_tmp = current_target.to_store_registers; | |
1428 | current_target.to_store_registers = noop_store_registers; | |
1429 | ||
1430 | generic_load (args, from_tty); | |
1431 | ||
1432 | current_target.to_store_registers = store_registers_tmp; | |
1433 | write_mem_command = OCD_WRITE_MEM; | |
1434 | ||
1435 | ocd_do_command (OCD_EXIT_MON, &status, &pktlen); | |
1436 | ||
c5aa993b | 1437 | /* discard_cleanups (old_chain); */ |
c906108c SS |
1438 | } |
1439 | ||
1440 | static void | |
1441 | bdm_read_register_command (args, from_tty) | |
1442 | char *args; | |
1443 | int from_tty; | |
1444 | { | |
1445 | /* XXX repeat should go on to the next register */ | |
1446 | ||
1447 | if (!ocd_desc) | |
1448 | error ("Not connected to OCD device."); | |
1449 | ||
1450 | if (!args) | |
1451 | error ("Must specify BDM register number."); | |
1452 | ||
1453 | } | |
1454 | \f | |
1455 | void | |
1456 | _initialize_remote_ocd () | |
1457 | { | |
1458 | extern struct cmd_list_element *cmdlist; | |
1459 | static struct cmd_list_element *ocd_cmd_list = NULL; | |
1460 | ||
1461 | add_show_from_set (add_set_cmd ("remotetimeout", no_class, | |
c5aa993b JM |
1462 | var_integer, (char *) &remote_timeout, |
1463 | "Set timeout value for remote read.\n", &setlist), | |
c906108c SS |
1464 | &showlist); |
1465 | ||
1466 | add_prefix_cmd ("ocd", class_obscure, bdm_command, "", &ocd_cmd_list, "ocd ", | |
1467 | 0, &cmdlist); | |
1468 | ||
1469 | add_cmd ("reset", class_obscure, bdm_reset_command, "", &ocd_cmd_list); | |
1470 | add_cmd ("restart", class_obscure, bdm_restart_command, "", &ocd_cmd_list); | |
1471 | add_cmd ("update-flash", class_obscure, bdm_update_flash_command, "", &ocd_cmd_list); | |
c5aa993b | 1472 | /* add_cmd ("read-register", class_obscure, bdm_read_register_command, "", &ocd_cmd_list); */ |
c906108c | 1473 | } |