Commit | Line | Data |
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c906108c | 1 | /* Target communications support for Macraigor Systems' On-Chip Debugging |
82467003 | 2 | Copyright 1996, 1997, 2001 Free Software Foundation, Inc. |
c906108c | 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" | |
c906108c SS |
30 | #include "gdbcmd.h" |
31 | #include "objfiles.h" | |
32 | #include "gdb-stabs.h" | |
c906108c SS |
33 | #include <sys/types.h> |
34 | #include <signal.h> | |
35 | #include "serial.h" | |
36 | #include "ocd.h" | |
4e052eda | 37 | #include "regcache.h" |
c906108c SS |
38 | |
39 | /* Prototypes for local functions */ | |
40 | ||
a14ed312 | 41 | static int ocd_read_bytes (CORE_ADDR memaddr, char *myaddr, int len); |
c906108c | 42 | |
a14ed312 | 43 | static int ocd_start_remote (PTR dummy); |
c906108c | 44 | |
a14ed312 | 45 | static int readchar (int timeout); |
c906108c | 46 | |
a14ed312 | 47 | static void reset_packet (void); |
c906108c | 48 | |
a14ed312 | 49 | static void output_packet (void); |
c906108c | 50 | |
a14ed312 | 51 | static int get_quoted_char (int timeout); |
c906108c | 52 | |
a14ed312 | 53 | static void put_quoted_char (int c); |
c906108c | 54 | |
a14ed312 | 55 | static void ocd_interrupt (int signo); |
c906108c | 56 | |
a14ed312 | 57 | static void ocd_interrupt_twice (int signo); |
c906108c | 58 | |
a14ed312 | 59 | static void interrupt_query (void); |
c906108c | 60 | |
a14ed312 | 61 | static unsigned char *ocd_do_command (int cmd, int *statusp, int *lenp); |
c906108c | 62 | |
a14ed312 | 63 | static void ocd_put_packet (unsigned char *packet, int pktlen); |
c906108c | 64 | |
a14ed312 | 65 | static unsigned char *ocd_get_packet (int cmd, int *pktlen, int timeout); |
c906108c SS |
66 | |
67 | static struct target_ops *current_ops = NULL; | |
68 | ||
69 | static int last_run_status; | |
70 | ||
71 | /* This was 5 seconds, which is a long time to sit and wait. | |
72 | Unless this is going though some terminal server or multiplexer or | |
73 | other form of hairy serial connection, I would think 2 seconds would | |
74 | be plenty. */ | |
75 | ||
76 | #if 0 | |
77 | /* FIXME: Change to allow option to set timeout value on a per target | |
78 | basis. */ | |
79 | static int remote_timeout = 2; | |
80 | #endif | |
81 | ||
82 | /* Descriptor for I/O to remote machine. Initialize it to NULL so that | |
83 | ocd_open knows that we don't have a file open when the program | |
84 | starts. */ | |
85 | static serial_t ocd_desc = NULL; | |
86 | \f | |
87 | void | |
fba45db2 | 88 | ocd_error (char *s, int error_code) |
c906108c SS |
89 | { |
90 | char buf[100]; | |
91 | ||
92 | fputs_filtered (s, gdb_stderr); | |
93 | fputs_filtered (" ", gdb_stderr); | |
94 | ||
95 | switch (error_code) | |
96 | { | |
c5aa993b JM |
97 | case 0x1: |
98 | s = "Unknown fault"; | |
99 | break; | |
100 | case 0x2: | |
101 | s = "Power failed"; | |
102 | break; | |
103 | case 0x3: | |
104 | s = "Cable disconnected"; | |
105 | break; | |
106 | case 0x4: | |
107 | s = "Couldn't enter OCD mode"; | |
108 | break; | |
109 | case 0x5: | |
110 | s = "Target stuck in reset"; | |
111 | break; | |
112 | case 0x6: | |
113 | s = "OCD hasn't been initialized"; | |
114 | break; | |
115 | case 0x7: | |
116 | s = "Write verify failed"; | |
117 | break; | |
118 | case 0x8: | |
119 | s = "Reg buff error (during MPC5xx fp reg read/write)"; | |
120 | break; | |
121 | case 0x9: | |
122 | s = "Invalid CPU register access attempt failed"; | |
123 | break; | |
124 | case 0x11: | |
125 | s = "Bus error"; | |
126 | break; | |
127 | case 0x12: | |
128 | s = "Checksum error"; | |
129 | break; | |
130 | case 0x13: | |
131 | s = "Illegal command"; | |
132 | break; | |
133 | case 0x14: | |
134 | s = "Parameter error"; | |
135 | break; | |
136 | case 0x15: | |
137 | s = "Internal error"; | |
138 | break; | |
139 | case 0x80: | |
140 | s = "Flash erase error"; | |
141 | break; | |
c906108c SS |
142 | default: |
143 | sprintf (buf, "Unknown error code %d", error_code); | |
144 | s = buf; | |
145 | } | |
146 | ||
147 | error (s); | |
148 | } | |
149 | ||
150 | /* Return nonzero if the thread TH is still alive on the remote system. */ | |
151 | ||
152 | int | |
fba45db2 | 153 | ocd_thread_alive (int th) |
c906108c SS |
154 | { |
155 | return 1; | |
156 | } | |
157 | \f | |
158 | /* Clean up connection to a remote debugger. */ | |
159 | ||
160 | /* ARGSUSED */ | |
161 | void | |
fba45db2 | 162 | ocd_close (int quitting) |
c906108c SS |
163 | { |
164 | if (ocd_desc) | |
165 | SERIAL_CLOSE (ocd_desc); | |
166 | ocd_desc = NULL; | |
167 | } | |
168 | ||
169 | /* Stub for catch_errors. */ | |
170 | ||
171 | static int | |
fba45db2 | 172 | ocd_start_remote (PTR dummy) |
c906108c SS |
173 | { |
174 | unsigned char buf[10], *p; | |
175 | int pktlen; | |
176 | int status; | |
177 | int error_code; | |
178 | int speed; | |
179 | enum ocd_target_type target_type; | |
180 | ||
c5aa993b | 181 | target_type = *(enum ocd_target_type *) dummy; |
c906108c | 182 | |
8edbea78 | 183 | immediate_quit++; /* Allow user to interrupt it */ |
c906108c | 184 | |
c5aa993b | 185 | SERIAL_SEND_BREAK (ocd_desc); /* Wake up the wiggler */ |
c906108c SS |
186 | |
187 | speed = 80; /* Divide clock by 4000 */ | |
188 | ||
189 | buf[0] = OCD_INIT; | |
190 | buf[1] = speed >> 8; | |
191 | buf[2] = speed & 0xff; | |
192 | buf[3] = target_type; | |
193 | ocd_put_packet (buf, 4); /* Init OCD params */ | |
194 | p = ocd_get_packet (buf[0], &pktlen, remote_timeout); | |
195 | ||
196 | if (pktlen < 2) | |
197 | error ("Truncated response packet from OCD device"); | |
198 | ||
199 | status = p[1]; | |
200 | error_code = p[2]; | |
201 | ||
202 | if (error_code != 0) | |
203 | ocd_error ("OCD_INIT:", error_code); | |
204 | ||
205 | ocd_do_command (OCD_AYT, &status, &pktlen); | |
206 | ||
207 | p = ocd_do_command (OCD_GET_VERSION, &status, &pktlen); | |
208 | ||
209 | printf_unfiltered ("[Wiggler version %x.%x, capability 0x%x]\n", | |
210 | p[0], p[1], (p[2] << 16) | p[3]); | |
211 | ||
212 | #if 0 | |
213 | /* Reset the target */ | |
214 | ||
215 | ocd_do_command (OCD_RESET_RUN, &status, &pktlen); | |
c5aa993b | 216 | /* ocd_do_command (OCD_RESET, &status, &pktlen); */ |
c906108c SS |
217 | #endif |
218 | ||
219 | /* If processor is still running, stop it. */ | |
220 | ||
221 | if (!(status & OCD_FLAG_BDM)) | |
222 | ocd_stop (); | |
223 | ||
224 | #if 1 | |
225 | /* When using a target box, we want to asynchronously return status when | |
226 | target stops. The OCD_SET_CTL_FLAGS command is ignored by Wigglers.dll | |
227 | when using a parallel Wiggler */ | |
228 | buf[0] = OCD_SET_CTL_FLAGS; | |
229 | buf[1] = 0; | |
230 | buf[2] = 1; | |
231 | ocd_put_packet (buf, 3); | |
232 | ||
233 | p = ocd_get_packet (buf[0], &pktlen, remote_timeout); | |
234 | ||
235 | if (pktlen < 2) | |
236 | error ("Truncated response packet from OCD device"); | |
237 | ||
238 | status = p[1]; | |
239 | error_code = p[2]; | |
240 | ||
241 | if (error_code != 0) | |
242 | ocd_error ("OCD_SET_CTL_FLAGS:", error_code); | |
243 | #endif | |
244 | ||
8edbea78 | 245 | immediate_quit--; |
c906108c SS |
246 | |
247 | /* This is really the job of start_remote however, that makes an assumption | |
248 | that the target is about to print out a status message of some sort. That | |
249 | doesn't happen here (in fact, it may not be possible to get the monitor to | |
250 | send the appropriate packet). */ | |
251 | ||
252 | flush_cached_frames (); | |
253 | registers_changed (); | |
254 | stop_pc = read_pc (); | |
255 | set_current_frame (create_new_frame (read_fp (), stop_pc)); | |
256 | select_frame (get_current_frame (), 0); | |
257 | print_stack_frame (selected_frame, -1, 1); | |
258 | ||
259 | buf[0] = OCD_LOG_FILE; | |
c5aa993b | 260 | buf[1] = 3; /* close existing WIGGLERS.LOG */ |
c906108c SS |
261 | ocd_put_packet (buf, 2); |
262 | p = ocd_get_packet (buf[0], &pktlen, remote_timeout); | |
263 | ||
264 | buf[0] = OCD_LOG_FILE; | |
c5aa993b | 265 | buf[1] = 2; /* append to existing WIGGLERS.LOG */ |
c906108c SS |
266 | ocd_put_packet (buf, 2); |
267 | p = ocd_get_packet (buf[0], &pktlen, remote_timeout); | |
268 | ||
269 | return 1; | |
270 | } | |
271 | ||
272 | /* Open a connection to a remote debugger. | |
273 | NAME is the filename used for communication. */ | |
274 | ||
c906108c | 275 | void |
fba45db2 KB |
276 | ocd_open (char *name, int from_tty, enum ocd_target_type target_type, |
277 | struct target_ops *ops) | |
c906108c SS |
278 | { |
279 | unsigned char buf[10], *p; | |
c906108c SS |
280 | int pktlen; |
281 | ||
282 | if (name == 0) | |
283 | error ("To open an OCD connection, you need to specify the\n\ | |
284 | device the OCD device is attached to (e.g. /dev/ttya)."); | |
285 | ||
286 | target_preopen (from_tty); | |
287 | ||
288 | current_ops = ops; | |
289 | ||
290 | unpush_target (current_ops); | |
291 | ||
c5aa993b JM |
292 | if (strncmp (name, "wiggler", 7) == 0) |
293 | { | |
294 | ocd_desc = SERIAL_OPEN ("ocd"); | |
295 | if (!ocd_desc) | |
296 | perror_with_name (name); | |
297 | ||
298 | buf[0] = OCD_LOG_FILE; | |
299 | buf[1] = 1; /* open new or overwrite existing WIGGLERS.LOG */ | |
300 | ocd_put_packet (buf, 2); | |
301 | p = ocd_get_packet (buf[0], &pktlen, remote_timeout); | |
302 | ||
303 | buf[0] = OCD_SET_CONNECTION; | |
304 | buf[1] = 0x01; /* atoi (name[11]); */ | |
305 | ocd_put_packet (buf, 2); | |
306 | p = ocd_get_packet (buf[0], &pktlen, remote_timeout); | |
307 | } | |
308 | else | |
309 | /* not using Wigglers.dll */ | |
310 | { | |
311 | ocd_desc = SERIAL_OPEN (name); | |
312 | if (!ocd_desc) | |
313 | perror_with_name (name); | |
314 | } | |
c906108c SS |
315 | |
316 | if (baud_rate != -1) | |
317 | { | |
318 | if (SERIAL_SETBAUDRATE (ocd_desc, baud_rate)) | |
319 | { | |
320 | SERIAL_CLOSE (ocd_desc); | |
321 | perror_with_name (name); | |
322 | } | |
323 | } | |
324 | ||
325 | SERIAL_RAW (ocd_desc); | |
326 | ||
327 | /* If there is something sitting in the buffer we might take it as a | |
328 | response to a command, which would be bad. */ | |
329 | SERIAL_FLUSH_INPUT (ocd_desc); | |
330 | ||
331 | if (from_tty) | |
332 | { | |
333 | puts_filtered ("Remote target wiggler connected to "); | |
334 | puts_filtered (name); | |
335 | puts_filtered ("\n"); | |
336 | } | |
337 | push_target (current_ops); /* Switch to using remote target now */ | |
338 | ||
339 | /* Without this, some commands which require an active target (such as kill) | |
340 | won't work. This variable serves (at least) double duty as both the pid | |
341 | of the target process (if it has such), and as a flag indicating that a | |
342 | target is active. These functions should be split out into seperate | |
343 | variables, especially since GDB will someday have a notion of debugging | |
344 | several processes. */ | |
345 | ||
346 | inferior_pid = 42000; | |
347 | /* Start the remote connection; if error (0), discard this target. | |
348 | In particular, if the user quits, be sure to discard it | |
349 | (we'd be in an inconsistent state otherwise). */ | |
350 | if (!catch_errors (ocd_start_remote, &target_type, | |
351 | "Couldn't establish connection to remote target\n", | |
352 | RETURN_MASK_ALL)) | |
353 | { | |
c5aa993b | 354 | pop_target (); |
c906108c SS |
355 | error ("Failed to connect to OCD."); |
356 | } | |
357 | } | |
358 | ||
359 | /* This takes a program previously attached to and detaches it. After | |
360 | this is done, GDB can be used to debug some other program. We | |
361 | better not have left any breakpoints in the target program or it'll | |
362 | die when it hits one. */ | |
363 | ||
364 | void | |
fba45db2 | 365 | ocd_detach (char *args, int from_tty) |
c906108c SS |
366 | { |
367 | if (args) | |
368 | error ("Argument given to \"detach\" when remotely debugging."); | |
369 | ||
370 | pop_target (); | |
371 | if (from_tty) | |
372 | puts_filtered ("Ending remote debugging.\n"); | |
373 | } | |
374 | \f | |
375 | /* Tell the remote machine to resume. */ | |
376 | ||
377 | void | |
fba45db2 | 378 | ocd_resume (int pid, int step, enum target_signal siggnal) |
c906108c SS |
379 | { |
380 | int pktlen; | |
381 | ||
c906108c SS |
382 | if (step) |
383 | ocd_do_command (OCD_STEP, &last_run_status, &pktlen); | |
384 | else | |
385 | ocd_do_command (OCD_RUN, &last_run_status, &pktlen); | |
386 | } | |
387 | \f | |
388 | void | |
fba45db2 | 389 | ocd_stop (void) |
c906108c SS |
390 | { |
391 | int status; | |
392 | int pktlen; | |
393 | ||
394 | ocd_do_command (OCD_STOP, &status, &pktlen); | |
395 | ||
396 | if (!(status & OCD_FLAG_BDM)) | |
397 | error ("Can't stop target via BDM"); | |
398 | } | |
399 | ||
400 | static volatile int ocd_interrupt_flag; | |
401 | ||
402 | /* Send ^C to target to halt it. Target will respond, and send us a | |
403 | packet. */ | |
404 | ||
405 | static void | |
fba45db2 | 406 | ocd_interrupt (int signo) |
c906108c SS |
407 | { |
408 | /* If this doesn't work, try more severe steps. */ | |
409 | signal (signo, ocd_interrupt_twice); | |
c5aa993b | 410 | |
c906108c SS |
411 | if (remote_debug) |
412 | printf_unfiltered ("ocd_interrupt called\n"); | |
413 | ||
414 | { | |
415 | char buf[1]; | |
416 | ||
417 | ocd_stop (); | |
418 | buf[0] = OCD_AYT; | |
419 | ocd_put_packet (buf, 1); | |
420 | ocd_interrupt_flag = 1; | |
421 | } | |
422 | } | |
423 | ||
c5aa993b | 424 | static void (*ofunc) (); |
c906108c SS |
425 | |
426 | /* The user typed ^C twice. */ | |
427 | static void | |
fba45db2 | 428 | ocd_interrupt_twice (int signo) |
c906108c SS |
429 | { |
430 | signal (signo, ofunc); | |
c5aa993b | 431 | |
c906108c SS |
432 | interrupt_query (); |
433 | ||
434 | signal (signo, ocd_interrupt); | |
435 | } | |
436 | ||
437 | /* Ask the user what to do when an interrupt is received. */ | |
438 | ||
439 | static void | |
fba45db2 | 440 | interrupt_query (void) |
c906108c SS |
441 | { |
442 | target_terminal_ours (); | |
443 | ||
444 | if (query ("Interrupted while waiting for the program.\n\ | |
445 | Give up (and stop debugging it)? ")) | |
446 | { | |
447 | target_mourn_inferior (); | |
448 | return_to_top_level (RETURN_QUIT); | |
449 | } | |
450 | ||
451 | target_terminal_inferior (); | |
452 | } | |
453 | ||
454 | /* If nonzero, ignore the next kill. */ | |
455 | static int kill_kludge; | |
456 | ||
457 | /* Wait until the remote machine stops, then return, | |
458 | storing status in STATUS just as `wait' would. | |
459 | Returns "pid" (though it's not clear what, if anything, that | |
460 | means in the case of this target). */ | |
461 | ||
462 | int | |
fba45db2 | 463 | ocd_wait (void) |
c906108c SS |
464 | { |
465 | unsigned char *p; | |
466 | int error_code; | |
467 | int pktlen; | |
468 | char buf[1]; | |
469 | ||
470 | ocd_interrupt_flag = 0; | |
471 | ||
472 | /* Target might already be stopped by the time we get here. */ | |
473 | /* If we aren't already stopped, we need to loop until we've dropped | |
474 | back into BDM mode */ | |
475 | ||
476 | while (!(last_run_status & OCD_FLAG_BDM)) | |
477 | { | |
478 | buf[0] = OCD_AYT; | |
479 | ocd_put_packet (buf, 1); | |
480 | p = ocd_get_packet (OCD_AYT, &pktlen, -1); | |
481 | ||
482 | ofunc = (void (*)()) signal (SIGINT, ocd_interrupt); | |
483 | signal (SIGINT, ofunc); | |
484 | ||
485 | if (pktlen < 2) | |
486 | error ("Truncated response packet from OCD device"); | |
487 | ||
488 | last_run_status = p[1]; | |
489 | error_code = p[2]; | |
490 | ||
491 | if (error_code != 0) | |
492 | ocd_error ("target_wait:", error_code); | |
493 | ||
494 | if (last_run_status & OCD_FLAG_PWF) | |
495 | error ("OCD device lost VCC at BDM interface."); | |
496 | else if (last_run_status & OCD_FLAG_CABLE_DISC) | |
497 | error ("OCD device cable appears to have been disconnected."); | |
498 | } | |
499 | ||
500 | if (ocd_interrupt_flag) | |
501 | return 1; | |
502 | else | |
503 | return 0; | |
504 | } | |
505 | ||
506 | /* Read registers from the OCD device. Specify the starting and ending | |
507 | register number. Return the number of regs actually read in *NUMREGS. | |
508 | Returns a pointer to a static array containing the register contents. */ | |
509 | ||
510 | unsigned char * | |
fba45db2 | 511 | ocd_read_bdm_registers (int first_bdm_regno, int last_bdm_regno, int *reglen) |
c906108c SS |
512 | { |
513 | unsigned char buf[10]; | |
514 | int i; | |
515 | unsigned char *p; | |
516 | unsigned char *regs; | |
517 | int error_code, status; | |
518 | int pktlen; | |
519 | ||
520 | buf[0] = OCD_READ_REGS; | |
521 | buf[1] = first_bdm_regno >> 8; | |
522 | buf[2] = first_bdm_regno & 0xff; | |
523 | buf[3] = last_bdm_regno >> 8; | |
524 | buf[4] = last_bdm_regno & 0xff; | |
525 | ||
526 | ocd_put_packet (buf, 5); | |
527 | p = ocd_get_packet (OCD_READ_REGS, &pktlen, remote_timeout); | |
528 | ||
529 | status = p[1]; | |
530 | error_code = p[2]; | |
531 | ||
532 | if (error_code != 0) | |
533 | ocd_error ("read_bdm_registers:", error_code); | |
534 | ||
535 | i = p[3]; | |
536 | if (i == 0) | |
537 | i = 256; | |
538 | ||
539 | if (i > pktlen - 4 | |
540 | || ((i & 3) != 0)) | |
541 | error ("Register block size bad: %d", i); | |
542 | ||
543 | *reglen = i; | |
544 | ||
545 | regs = p + 4; | |
546 | ||
547 | return regs; | |
548 | } | |
549 | ||
550 | /* Read register BDM_REGNO and returns its value ala read_register() */ | |
551 | ||
552 | CORE_ADDR | |
fba45db2 | 553 | ocd_read_bdm_register (int bdm_regno) |
c906108c SS |
554 | { |
555 | int reglen; | |
556 | unsigned char *p; | |
557 | CORE_ADDR regval; | |
558 | ||
559 | p = ocd_read_bdm_registers (bdm_regno, bdm_regno, ®len); | |
560 | regval = extract_unsigned_integer (p, reglen); | |
561 | ||
562 | return regval; | |
563 | } | |
564 | ||
565 | void | |
fba45db2 | 566 | ocd_write_bdm_registers (int first_bdm_regno, unsigned char *regptr, int reglen) |
c906108c SS |
567 | { |
568 | unsigned char *buf; | |
569 | unsigned char *p; | |
570 | int error_code, status; | |
571 | int pktlen; | |
572 | ||
573 | buf = alloca (4 + reglen); | |
574 | ||
575 | buf[0] = OCD_WRITE_REGS; | |
576 | buf[1] = first_bdm_regno >> 8; | |
577 | buf[2] = first_bdm_regno & 0xff; | |
578 | buf[3] = reglen; | |
579 | memcpy (buf + 4, regptr, reglen); | |
580 | ||
581 | ocd_put_packet (buf, 4 + reglen); | |
582 | p = ocd_get_packet (OCD_WRITE_REGS, &pktlen, remote_timeout); | |
583 | ||
584 | if (pktlen < 3) | |
585 | error ("Truncated response packet from OCD device"); | |
586 | ||
587 | status = p[1]; | |
588 | error_code = p[2]; | |
589 | ||
590 | if (error_code != 0) | |
591 | ocd_error ("ocd_write_bdm_registers:", error_code); | |
592 | } | |
593 | ||
594 | void | |
fba45db2 | 595 | ocd_write_bdm_register (int bdm_regno, CORE_ADDR reg) |
c906108c SS |
596 | { |
597 | unsigned char buf[4]; | |
598 | ||
599 | store_unsigned_integer (buf, 4, reg); | |
600 | ||
601 | ocd_write_bdm_registers (bdm_regno, buf, 4); | |
602 | } | |
603 | \f | |
c5aa993b | 604 | void |
fba45db2 | 605 | ocd_prepare_to_store (void) |
c906108c SS |
606 | { |
607 | } | |
608 | \f | |
609 | /* Write memory data directly to the remote machine. | |
610 | This does not inform the data cache; the data cache uses this. | |
611 | MEMADDR is the address in the remote memory space. | |
612 | MYADDR is the address of the buffer in our space. | |
613 | LEN is the number of bytes. | |
614 | ||
615 | Returns number of bytes transferred, or 0 for error. */ | |
616 | ||
617 | static int write_mem_command = OCD_WRITE_MEM; | |
618 | ||
619 | int | |
fba45db2 | 620 | ocd_write_bytes (CORE_ADDR memaddr, char *myaddr, int len) |
c906108c SS |
621 | { |
622 | char buf[256 + 10]; | |
623 | unsigned char *p; | |
624 | int origlen; | |
625 | ||
626 | origlen = len; | |
627 | ||
628 | buf[0] = write_mem_command; | |
629 | buf[5] = 1; /* Write as bytes */ | |
630 | buf[6] = 0; /* Don't verify */ | |
631 | ||
632 | while (len > 0) | |
633 | { | |
634 | int numbytes; | |
635 | int pktlen; | |
636 | int status, error_code; | |
637 | ||
638 | numbytes = min (len, 256 - 8); | |
639 | ||
640 | buf[1] = memaddr >> 24; | |
641 | buf[2] = memaddr >> 16; | |
642 | buf[3] = memaddr >> 8; | |
643 | buf[4] = memaddr; | |
644 | ||
645 | buf[7] = numbytes; | |
646 | ||
647 | memcpy (&buf[8], myaddr, numbytes); | |
648 | ocd_put_packet (buf, 8 + numbytes); | |
649 | p = ocd_get_packet (OCD_WRITE_MEM, &pktlen, remote_timeout); | |
650 | if (pktlen < 3) | |
651 | error ("Truncated response packet from OCD device"); | |
652 | ||
653 | status = p[1]; | |
654 | error_code = p[2]; | |
655 | ||
656 | if (error_code == 0x11) /* Got a bus error? */ | |
657 | { | |
658 | CORE_ADDR error_address; | |
659 | ||
660 | error_address = p[3] << 24; | |
661 | error_address |= p[4] << 16; | |
662 | error_address |= p[5] << 8; | |
663 | error_address |= p[6]; | |
664 | numbytes = error_address - memaddr; | |
665 | ||
666 | len -= numbytes; | |
667 | ||
668 | errno = EIO; | |
669 | ||
670 | break; | |
671 | } | |
672 | else if (error_code != 0) | |
673 | ocd_error ("ocd_write_bytes:", error_code); | |
674 | ||
675 | len -= numbytes; | |
676 | memaddr += numbytes; | |
677 | myaddr += numbytes; | |
678 | } | |
679 | ||
680 | return origlen - len; | |
681 | } | |
682 | ||
683 | /* Read memory data directly from the remote machine. | |
684 | This does not use the data cache; the data cache uses this. | |
685 | MEMADDR is the address in the remote memory space. | |
686 | MYADDR is the address of the buffer in our space. | |
687 | LEN is the number of bytes. | |
688 | ||
689 | Returns number of bytes transferred, or 0 for error. */ | |
690 | ||
691 | static int | |
fba45db2 | 692 | ocd_read_bytes (CORE_ADDR memaddr, char *myaddr, int len) |
c906108c SS |
693 | { |
694 | char buf[256 + 10]; | |
695 | unsigned char *p; | |
696 | int origlen; | |
697 | ||
698 | origlen = len; | |
699 | ||
700 | buf[0] = OCD_READ_MEM; | |
701 | buf[5] = 1; /* Read as bytes */ | |
702 | ||
703 | while (len > 0) | |
704 | { | |
705 | int numbytes; | |
706 | int pktlen; | |
707 | int status, error_code; | |
708 | ||
709 | numbytes = min (len, 256 - 7); | |
710 | ||
711 | buf[1] = memaddr >> 24; | |
712 | buf[2] = memaddr >> 16; | |
713 | buf[3] = memaddr >> 8; | |
714 | buf[4] = memaddr; | |
715 | ||
716 | buf[6] = numbytes; | |
717 | ||
718 | ocd_put_packet (buf, 7); | |
719 | p = ocd_get_packet (OCD_READ_MEM, &pktlen, remote_timeout); | |
720 | if (pktlen < 4) | |
721 | error ("Truncated response packet from OCD device"); | |
722 | ||
723 | status = p[1]; | |
724 | error_code = p[2]; | |
725 | ||
726 | if (error_code == 0x11) /* Got a bus error? */ | |
727 | { | |
728 | CORE_ADDR error_address; | |
729 | ||
730 | error_address = p[3] << 24; | |
731 | error_address |= p[4] << 16; | |
732 | error_address |= p[5] << 8; | |
733 | error_address |= p[6]; | |
734 | numbytes = error_address - memaddr; | |
735 | ||
736 | len -= numbytes; | |
737 | ||
738 | errno = EIO; | |
739 | ||
740 | break; | |
741 | } | |
742 | else if (error_code != 0) | |
743 | ocd_error ("ocd_read_bytes:", error_code); | |
744 | ||
745 | memcpy (myaddr, &p[4], numbytes); | |
746 | ||
747 | len -= numbytes; | |
748 | memaddr += numbytes; | |
749 | myaddr += numbytes; | |
750 | } | |
751 | ||
752 | return origlen - len; | |
753 | } | |
754 | \f | |
755 | /* Read or write LEN bytes from inferior memory at MEMADDR, transferring | |
756 | to or from debugger address MYADDR. Write to inferior if SHOULD_WRITE is | |
697ec6c4 KB |
757 | nonzero. Returns length of data written or read; 0 for error. TARGET |
758 | is ignored. */ | |
c906108c SS |
759 | |
760 | /* ARGSUSED */ | |
761 | int | |
697ec6c4 | 762 | ocd_xfer_memory (CORE_ADDR memaddr, char *myaddr, int len, int should_write, |
58841d58 | 763 | struct mem_attrib *attrib, struct target_ops *target) |
c906108c | 764 | { |
4930751a C |
765 | int res; |
766 | ||
767 | if (should_write) | |
768 | res = ocd_write_bytes (memaddr, myaddr, len); | |
769 | else | |
770 | res = ocd_read_bytes (memaddr, myaddr, len); | |
771 | ||
772 | return res; | |
c906108c SS |
773 | } |
774 | \f | |
775 | void | |
fba45db2 | 776 | ocd_files_info (struct target_ops *ignore) |
c906108c SS |
777 | { |
778 | puts_filtered ("Debugging a target over a serial line.\n"); | |
779 | } | |
780 | \f | |
781 | /* Stuff for dealing with the packets which are part of this protocol. | |
782 | See comment at top of file for details. */ | |
783 | ||
784 | /* Read a single character from the remote side, handling wierd errors. */ | |
785 | ||
786 | static int | |
fba45db2 | 787 | readchar (int timeout) |
c906108c SS |
788 | { |
789 | int ch; | |
790 | ||
791 | ch = SERIAL_READCHAR (ocd_desc, timeout); | |
792 | ||
793 | switch (ch) | |
794 | { | |
795 | case SERIAL_EOF: | |
796 | error ("Remote connection closed"); | |
797 | case SERIAL_ERROR: | |
798 | perror_with_name ("Remote communication error"); | |
799 | case SERIAL_TIMEOUT: | |
800 | default: | |
801 | return ch; | |
802 | } | |
803 | } | |
804 | ||
805 | #if 0 | |
806 | /* Read a character from the data stream, dequoting as necessary. SYN is | |
807 | treated special. Any SYNs appearing in the data stream are returned as the | |
808 | distinct value RAW_SYN (which has a value > 8 bits and therefore cannot be | |
809 | mistaken for real data). */ | |
810 | ||
811 | static int | |
fba45db2 | 812 | get_quoted_char (int timeout) |
c906108c SS |
813 | { |
814 | int ch; | |
815 | ||
816 | ch = readchar (timeout); | |
817 | ||
818 | switch (ch) | |
819 | { | |
820 | case SERIAL_TIMEOUT: | |
821 | error ("Timeout in mid-packet, aborting"); | |
822 | case SYN: | |
823 | return RAW_SYN; | |
824 | case DLE: | |
825 | ch = readchar (timeout); | |
826 | if (ch == SYN) | |
827 | return RAW_SYN; | |
828 | return ch & ~0100; | |
829 | default: | |
830 | return ch; | |
831 | } | |
832 | } | |
833 | ||
c5aa993b | 834 | static unsigned char pkt[256 * 2 + 10], *pktp; /* Worst case */ |
c906108c SS |
835 | |
836 | static void | |
fba45db2 | 837 | reset_packet (void) |
c906108c SS |
838 | { |
839 | pktp = pkt; | |
840 | } | |
841 | ||
842 | static void | |
fba45db2 | 843 | output_packet (void) |
c906108c SS |
844 | { |
845 | if (SERIAL_WRITE (ocd_desc, pkt, pktp - pkt)) | |
846 | perror_with_name ("output_packet: write failed"); | |
847 | ||
848 | reset_packet (); | |
849 | } | |
850 | ||
851 | /* Output a quoted character. SYNs and DLEs are quoted. Everything else goes | |
852 | through untouched. */ | |
853 | ||
854 | static void | |
fba45db2 | 855 | put_quoted_char (int c) |
c906108c SS |
856 | { |
857 | switch (c) | |
858 | { | |
859 | case SYN: | |
860 | case DLE: | |
861 | *pktp++ = DLE; | |
862 | c |= 0100; | |
863 | } | |
864 | ||
865 | *pktp++ = c; | |
866 | } | |
867 | ||
868 | /* Send a packet to the OCD device. The packet framed by a SYN character, | |
869 | a byte count and a checksum. The byte count only counts the number of | |
870 | bytes between the count and the checksum. A count of zero actually | |
871 | means 256. Any SYNs within the packet (including the checksum and | |
872 | count) must be quoted. The quote character must be quoted as well. | |
873 | Quoting is done by replacing the character with the two-character sequence | |
874 | DLE, {char} | 0100. Note that the quoting mechanism has no effect on the | |
875 | byte count. */ | |
876 | ||
877 | static void | |
fba45db2 | 878 | stu_put_packet (unsigned char *buf, int len) |
c906108c SS |
879 | { |
880 | unsigned char checksum; | |
881 | unsigned char c; | |
882 | ||
883 | if (len == 0 || len > 256) | |
e1e9e218 | 884 | internal_error (__FILE__, __LINE__, "failed internal consistency check"); /* Can't represent 0 length packet */ |
c906108c SS |
885 | |
886 | reset_packet (); | |
887 | ||
888 | checksum = 0; | |
889 | ||
890 | put_quoted_char (RAW_SYN); | |
891 | ||
892 | c = len; | |
893 | ||
894 | do | |
895 | { | |
896 | checksum += c; | |
897 | ||
898 | put_quoted_char (c); | |
899 | ||
900 | c = *buf++; | |
901 | } | |
902 | while (len-- > 0); | |
903 | ||
904 | put_quoted_char (-checksum & 0xff); | |
905 | ||
906 | output_packet (); | |
907 | } | |
908 | ||
909 | #else | |
910 | ||
911 | /* Send a packet to the OCD device. The packet framed by a SYN character, | |
912 | a byte count and a checksum. The byte count only counts the number of | |
913 | bytes between the count and the checksum. A count of zero actually | |
914 | means 256. Any SYNs within the packet (including the checksum and | |
915 | count) must be quoted. The quote character must be quoted as well. | |
916 | Quoting is done by replacing the character with the two-character sequence | |
917 | DLE, {char} | 0100. Note that the quoting mechanism has no effect on the | |
918 | byte count. */ | |
919 | ||
920 | static void | |
fba45db2 | 921 | ocd_put_packet (unsigned char *buf, int len) |
c906108c SS |
922 | { |
923 | unsigned char checksum; | |
924 | unsigned char c; | |
925 | unsigned char *packet, *packet_ptr; | |
926 | ||
c5aa993b | 927 | packet = alloca (len + 1 + 1); /* packet + SYN + checksum */ |
c906108c SS |
928 | packet_ptr = packet; |
929 | ||
930 | checksum = 0; | |
931 | ||
932 | *packet_ptr++ = 0x55; | |
933 | ||
934 | while (len-- > 0) | |
935 | { | |
936 | c = *buf++; | |
937 | ||
938 | checksum += c; | |
939 | *packet_ptr++ = c; | |
940 | } | |
941 | ||
942 | *packet_ptr++ = -checksum; | |
943 | if (SERIAL_WRITE (ocd_desc, packet, packet_ptr - packet)) | |
944 | perror_with_name ("output_packet: write failed"); | |
945 | } | |
946 | #endif | |
947 | ||
948 | #if 0 | |
949 | /* Get a packet from the OCD device. Timeout is only enforced for the | |
950 | first byte of the packet. Subsequent bytes are expected to arrive in | |
951 | time <= remote_timeout. Returns a pointer to a static buffer containing | |
952 | the payload of the packet. *LENP contains the length of the packet. | |
c5aa993b | 953 | */ |
c906108c SS |
954 | |
955 | static unsigned char * | |
fba45db2 | 956 | stu_get_packet (unsigned char cmd, int *lenp, int timeout) |
c906108c SS |
957 | { |
958 | int ch; | |
959 | int len; | |
960 | static unsigned char buf[256 + 10], *p; | |
961 | unsigned char checksum; | |
962 | ||
c5aa993b | 963 | find_packet: |
c906108c SS |
964 | |
965 | ch = get_quoted_char (timeout); | |
966 | ||
967 | if (ch < 0) | |
968 | error ("get_packet (readchar): %d", ch); | |
969 | ||
970 | if (ch != RAW_SYN) | |
971 | goto find_packet; | |
972 | ||
c5aa993b | 973 | found_syn: /* Found the start of a packet */ |
c906108c SS |
974 | |
975 | p = buf; | |
976 | checksum = 0; | |
977 | ||
978 | len = get_quoted_char (remote_timeout); | |
979 | ||
980 | if (len == RAW_SYN) | |
981 | goto found_syn; | |
982 | ||
983 | checksum += len; | |
984 | ||
985 | if (len == 0) | |
986 | len = 256; | |
987 | ||
988 | len++; /* Include checksum */ | |
989 | ||
990 | while (len-- > 0) | |
991 | { | |
992 | ch = get_quoted_char (remote_timeout); | |
993 | if (ch == RAW_SYN) | |
994 | goto found_syn; | |
995 | ||
996 | *p++ = ch; | |
997 | checksum += ch; | |
998 | } | |
999 | ||
1000 | if (checksum != 0) | |
1001 | goto find_packet; | |
1002 | ||
1003 | if (cmd != buf[0]) | |
1004 | error ("Response phase error. Got 0x%x, expected 0x%x", buf[0], cmd); | |
1005 | ||
1006 | *lenp = p - buf - 1; | |
1007 | return buf; | |
1008 | } | |
1009 | ||
1010 | #else | |
1011 | ||
1012 | /* Get a packet from the OCD device. Timeout is only enforced for the | |
1013 | first byte of the packet. Subsequent bytes are expected to arrive in | |
1014 | time <= remote_timeout. Returns a pointer to a static buffer containing | |
1015 | the payload of the packet. *LENP contains the length of the packet. | |
c5aa993b | 1016 | */ |
c906108c SS |
1017 | |
1018 | static unsigned char * | |
fba45db2 | 1019 | ocd_get_packet (int cmd, int *lenp, int timeout) |
c906108c SS |
1020 | { |
1021 | int ch; | |
1022 | int len; | |
c906108c SS |
1023 | static unsigned char packet[512]; |
1024 | unsigned char *packet_ptr; | |
1025 | unsigned char checksum; | |
1026 | ||
1027 | ch = readchar (timeout); | |
1028 | ||
1029 | if (ch < 0) | |
1030 | error ("ocd_get_packet (readchar): %d", ch); | |
1031 | ||
1032 | if (ch != 0x55) | |
1033 | error ("ocd_get_packet (readchar): %d", ch); | |
1034 | ||
1035 | /* Found the start of a packet */ | |
1036 | ||
1037 | packet_ptr = packet; | |
1038 | checksum = 0; | |
1039 | ||
1040 | /* Read command char. That sort of tells us how long the packet is. */ | |
1041 | ||
1042 | ch = readchar (timeout); | |
1043 | ||
1044 | if (ch < 0) | |
1045 | error ("ocd_get_packet (readchar): %d", ch); | |
1046 | ||
1047 | *packet_ptr++ = ch; | |
1048 | checksum += ch; | |
1049 | ||
1050 | /* Get status. */ | |
1051 | ||
1052 | ch = readchar (timeout); | |
1053 | ||
1054 | if (ch < 0) | |
1055 | error ("ocd_get_packet (readchar): %d", ch); | |
1056 | *packet_ptr++ = ch; | |
1057 | checksum += ch; | |
1058 | ||
1059 | /* Get error code. */ | |
1060 | ||
1061 | ch = readchar (timeout); | |
1062 | ||
1063 | if (ch < 0) | |
1064 | error ("ocd_get_packet (readchar): %d", ch); | |
1065 | *packet_ptr++ = ch; | |
1066 | checksum += ch; | |
1067 | ||
1068 | switch (ch) /* Figure out length of packet */ | |
1069 | { | |
1070 | case 0x7: /* Write verify error? */ | |
1071 | len = 8; /* write address, value read back */ | |
1072 | break; | |
1073 | case 0x11: /* Bus error? */ | |
c5aa993b | 1074 | /* write address, read flag */ |
c906108c SS |
1075 | case 0x15: /* Internal error */ |
1076 | len = 5; /* error code, vector */ | |
1077 | break; | |
1078 | default: /* Error w/no params */ | |
1079 | len = 0; | |
1080 | break; | |
1081 | case 0x0: /* Normal result */ | |
1082 | switch (packet[0]) | |
1083 | { | |
c5aa993b JM |
1084 | case OCD_AYT: /* Are You There? */ |
1085 | case OCD_SET_BAUD_RATE: /* Set Baud Rate */ | |
1086 | case OCD_INIT: /* Initialize OCD device */ | |
c906108c | 1087 | case OCD_SET_SPEED: /* Set Speed */ |
c5aa993b JM |
1088 | case OCD_SET_FUNC_CODE: /* Set Function Code */ |
1089 | case OCD_SET_CTL_FLAGS: /* Set Control Flags */ | |
1090 | case OCD_SET_BUF_ADDR: /* Set Register Buffer Address */ | |
1091 | case OCD_RUN: /* Run Target from PC */ | |
c906108c | 1092 | case OCD_RUN_ADDR: /* Run Target from Specified Address */ |
c5aa993b | 1093 | case OCD_STOP: /* Stop Target */ |
c906108c SS |
1094 | case OCD_RESET_RUN: /* Reset Target and Run */ |
1095 | case OCD_RESET: /* Reset Target and Halt */ | |
c5aa993b JM |
1096 | case OCD_STEP: /* Single Step */ |
1097 | case OCD_WRITE_REGS: /* Write Register */ | |
c906108c SS |
1098 | case OCD_WRITE_MEM: /* Write Memory */ |
1099 | case OCD_FILL_MEM: /* Fill Memory */ | |
1100 | case OCD_MOVE_MEM: /* Move Memory */ | |
c5aa993b JM |
1101 | case OCD_WRITE_INT_MEM: /* Write Internal Memory */ |
1102 | case OCD_JUMP: /* Jump to Subroutine */ | |
1103 | case OCD_ERASE_FLASH: /* Erase flash memory */ | |
1104 | case OCD_PROGRAM_FLASH: /* Write flash memory */ | |
c906108c SS |
1105 | case OCD_EXIT_MON: /* Exit the flash programming monitor */ |
1106 | case OCD_ENTER_MON: /* Enter the flash programming monitor */ | |
1107 | case OCD_LOG_FILE: /* Make Wigglers.dll save Wigglers.log */ | |
c5aa993b | 1108 | case OCD_SET_CONNECTION: /* Set type of connection in Wigglers.dll */ |
c906108c SS |
1109 | len = 0; |
1110 | break; | |
c5aa993b | 1111 | case OCD_GET_VERSION: /* Get Version */ |
c906108c SS |
1112 | len = 10; |
1113 | break; | |
c5aa993b | 1114 | case OCD_GET_STATUS_MASK: /* Get Status Mask */ |
c906108c SS |
1115 | len = 1; |
1116 | break; | |
1117 | case OCD_GET_CTRS: /* Get Error Counters */ | |
1118 | case OCD_READ_REGS: /* Read Register */ | |
1119 | case OCD_READ_MEM: /* Read Memory */ | |
c5aa993b | 1120 | case OCD_READ_INT_MEM: /* Read Internal Memory */ |
c906108c SS |
1121 | len = 257; |
1122 | break; | |
1123 | default: | |
1124 | error ("ocd_get_packet: unknown packet type 0x%x\n", ch); | |
1125 | } | |
1126 | } | |
1127 | ||
1128 | if (len == 257) /* Byte stream? */ | |
1129 | { /* Yes, byte streams contain the length */ | |
1130 | ch = readchar (timeout); | |
1131 | ||
1132 | if (ch < 0) | |
1133 | error ("ocd_get_packet (readchar): %d", ch); | |
1134 | *packet_ptr++ = ch; | |
1135 | checksum += ch; | |
1136 | len = ch; | |
1137 | if (len == 0) | |
1138 | len = 256; | |
1139 | } | |
1140 | ||
1141 | while (len-- >= 0) /* Do rest of packet and checksum */ | |
1142 | { | |
1143 | ch = readchar (timeout); | |
1144 | ||
1145 | if (ch < 0) | |
1146 | error ("ocd_get_packet (readchar): %d", ch); | |
1147 | *packet_ptr++ = ch; | |
1148 | checksum += ch; | |
1149 | } | |
1150 | ||
1151 | if (checksum != 0) | |
1152 | error ("ocd_get_packet: bad packet checksum"); | |
1153 | ||
1154 | if (cmd != -1 && cmd != packet[0]) | |
1155 | error ("Response phase error. Got 0x%x, expected 0x%x", packet[0], cmd); | |
1156 | ||
c5aa993b | 1157 | *lenp = packet_ptr - packet - 1; /* Subtract checksum byte */ |
c906108c SS |
1158 | return packet; |
1159 | } | |
1160 | #endif | |
1161 | ||
1162 | /* Execute a simple (one-byte) command. Returns a pointer to the data | |
1163 | following the error code. */ | |
1164 | ||
1165 | static unsigned char * | |
fba45db2 | 1166 | ocd_do_command (int cmd, int *statusp, int *lenp) |
c906108c SS |
1167 | { |
1168 | unsigned char buf[100], *p; | |
1169 | int status, error_code; | |
1170 | char errbuf[100]; | |
1171 | ||
1172 | unsigned char logbuf[100]; | |
1173 | int logpktlen; | |
1174 | ||
1175 | buf[0] = cmd; | |
c5aa993b | 1176 | ocd_put_packet (buf, 1); /* Send command */ |
c906108c SS |
1177 | p = ocd_get_packet (*buf, lenp, remote_timeout); |
1178 | ||
1179 | if (*lenp < 3) | |
1180 | error ("Truncated response packet from OCD device"); | |
1181 | ||
1182 | status = p[1]; | |
1183 | error_code = p[2]; | |
1184 | ||
1185 | if (error_code != 0) | |
1186 | { | |
1187 | sprintf (errbuf, "ocd_do_command (0x%x):", cmd); | |
1188 | ocd_error (errbuf, error_code); | |
1189 | } | |
1190 | ||
1191 | if (status & OCD_FLAG_PWF) | |
1192 | error ("OCD device can't detect VCC at BDM interface."); | |
1193 | else if (status & OCD_FLAG_CABLE_DISC) | |
1194 | error ("BDM cable appears to be disconnected."); | |
1195 | ||
1196 | *statusp = status; | |
1197 | ||
1198 | logbuf[0] = OCD_LOG_FILE; | |
c5aa993b | 1199 | logbuf[1] = 3; /* close existing WIGGLERS.LOG */ |
c906108c SS |
1200 | ocd_put_packet (logbuf, 2); |
1201 | ocd_get_packet (logbuf[0], &logpktlen, remote_timeout); | |
1202 | ||
1203 | logbuf[0] = OCD_LOG_FILE; | |
c5aa993b | 1204 | logbuf[1] = 2; /* append to existing WIGGLERS.LOG */ |
c906108c SS |
1205 | ocd_put_packet (logbuf, 2); |
1206 | ocd_get_packet (logbuf[0], &logpktlen, remote_timeout); | |
1207 | ||
1208 | return p + 3; | |
1209 | } | |
1210 | \f | |
1211 | void | |
fba45db2 | 1212 | ocd_kill (void) |
c906108c SS |
1213 | { |
1214 | /* For some mysterious reason, wait_for_inferior calls kill instead of | |
1215 | mourn after it gets TARGET_WAITKIND_SIGNALLED. Work around it. */ | |
1216 | if (kill_kludge) | |
1217 | { | |
1218 | kill_kludge = 0; | |
1219 | target_mourn_inferior (); | |
1220 | return; | |
1221 | } | |
1222 | ||
1223 | /* Don't wait for it to die. I'm not really sure it matters whether | |
1224 | we do or not. */ | |
1225 | target_mourn_inferior (); | |
1226 | } | |
1227 | ||
1228 | void | |
fba45db2 | 1229 | ocd_mourn (void) |
c906108c SS |
1230 | { |
1231 | unpush_target (current_ops); | |
1232 | generic_mourn_inferior (); | |
1233 | } | |
1234 | ||
1235 | /* All we actually do is set the PC to the start address of exec_bfd, and start | |
1236 | the program at that point. */ | |
1237 | ||
1238 | void | |
fba45db2 | 1239 | ocd_create_inferior (char *exec_file, char *args, char **env) |
c906108c SS |
1240 | { |
1241 | if (args && (*args != '\000')) | |
1242 | error ("Args are not supported by BDM."); | |
1243 | ||
1244 | clear_proceed_status (); | |
1245 | proceed (bfd_get_start_address (exec_bfd), TARGET_SIGNAL_0, 0); | |
1246 | } | |
1247 | ||
1248 | void | |
fba45db2 | 1249 | ocd_load (char *args, int from_tty) |
c906108c SS |
1250 | { |
1251 | generic_load (args, from_tty); | |
1252 | ||
1253 | inferior_pid = 0; | |
1254 | ||
1255 | /* This is necessary because many things were based on the PC at the time that | |
1256 | we attached to the monitor, which is no longer valid now that we have loaded | |
1257 | new code (and just changed the PC). Another way to do this might be to call | |
1258 | normal_stop, except that the stack may not be valid, and things would get | |
1259 | horribly confused... */ | |
1260 | ||
1261 | clear_symtab_users (); | |
1262 | } | |
1263 | ||
1264 | /* This should be defined for each target */ | |
1265 | /* But we want to be able to compile this file for some configurations | |
1266 | not yet supported fully */ | |
c5aa993b JM |
1267 | |
1268 | #define BDM_BREAKPOINT {0x0,0x0,0x0,0x0} /* For ppc 8xx */ | |
c906108c | 1269 | #if 0 |
c5aa993b | 1270 | #define BDM_BREAKPOINT {0x4a,0xfa} /* BGND insn used for CPU32 */ |
c906108c SS |
1271 | #endif |
1272 | ||
1273 | /* BDM (at least on CPU32) uses a different breakpoint */ | |
1274 | ||
1275 | int | |
fba45db2 | 1276 | ocd_insert_breakpoint (CORE_ADDR addr, char *contents_cache) |
c906108c SS |
1277 | { |
1278 | static char break_insn[] = BDM_BREAKPOINT; | |
1279 | int val; | |
1280 | ||
1281 | val = target_read_memory (addr, contents_cache, sizeof (break_insn)); | |
1282 | ||
1283 | if (val == 0) | |
1284 | val = target_write_memory (addr, break_insn, sizeof (break_insn)); | |
1285 | ||
1286 | return val; | |
1287 | } | |
1288 | ||
1289 | int | |
fba45db2 | 1290 | ocd_remove_breakpoint (CORE_ADDR addr, char *contents_cache) |
c906108c SS |
1291 | { |
1292 | static char break_insn[] = BDM_BREAKPOINT; | |
1293 | int val; | |
1294 | ||
1295 | val = target_write_memory (addr, contents_cache, sizeof (break_insn)); | |
1296 | ||
1297 | return val; | |
1298 | } | |
1299 | ||
1300 | static void | |
fba45db2 | 1301 | bdm_command (char *args, int from_tty) |
c906108c SS |
1302 | { |
1303 | error ("bdm command must be followed by `reset'"); | |
1304 | } | |
1305 | ||
1306 | static void | |
fba45db2 | 1307 | bdm_reset_command (char *args, int from_tty) |
c906108c SS |
1308 | { |
1309 | int status, pktlen; | |
1310 | ||
1311 | if (!ocd_desc) | |
1312 | error ("Not connected to OCD device."); | |
1313 | ||
1314 | ocd_do_command (OCD_RESET, &status, &pktlen); | |
4930751a | 1315 | dcache_invalidate (target_dcache); |
c906108c SS |
1316 | registers_changed (); |
1317 | } | |
1318 | ||
1319 | static void | |
fba45db2 | 1320 | bdm_restart_command (char *args, int from_tty) |
c906108c SS |
1321 | { |
1322 | int status, pktlen; | |
1323 | ||
1324 | if (!ocd_desc) | |
1325 | error ("Not connected to OCD device."); | |
1326 | ||
1327 | ocd_do_command (OCD_RESET_RUN, &status, &pktlen); | |
1328 | last_run_status = status; | |
1329 | clear_proceed_status (); | |
1330 | wait_for_inferior (); | |
1331 | normal_stop (); | |
1332 | } | |
1333 | ||
1334 | /* Temporary replacement for target_store_registers(). This prevents | |
1335 | generic_load from trying to set the PC. */ | |
1336 | ||
1337 | static void | |
fba45db2 | 1338 | noop_store_registers (int regno) |
c906108c SS |
1339 | { |
1340 | } | |
1341 | ||
1342 | static void | |
fba45db2 | 1343 | bdm_update_flash_command (char *args, int from_tty) |
c906108c SS |
1344 | { |
1345 | int status, pktlen; | |
d4f3574e | 1346 | struct cleanup *old_chain; |
507f3c78 | 1347 | void (*store_registers_tmp) (int); |
c906108c SS |
1348 | |
1349 | if (!ocd_desc) | |
1350 | error ("Not connected to OCD device."); | |
1351 | ||
1352 | if (!args) | |
1353 | error ("Must specify file containing new OCD code."); | |
1354 | ||
c5aa993b | 1355 | /* old_chain = make_cleanup (flash_cleanup, 0); */ |
c906108c SS |
1356 | |
1357 | ocd_do_command (OCD_ENTER_MON, &status, &pktlen); | |
1358 | ||
1359 | ocd_do_command (OCD_ERASE_FLASH, &status, &pktlen); | |
1360 | ||
1361 | write_mem_command = OCD_PROGRAM_FLASH; | |
1362 | store_registers_tmp = current_target.to_store_registers; | |
1363 | current_target.to_store_registers = noop_store_registers; | |
1364 | ||
1365 | generic_load (args, from_tty); | |
1366 | ||
1367 | current_target.to_store_registers = store_registers_tmp; | |
1368 | write_mem_command = OCD_WRITE_MEM; | |
1369 | ||
1370 | ocd_do_command (OCD_EXIT_MON, &status, &pktlen); | |
1371 | ||
c5aa993b | 1372 | /* discard_cleanups (old_chain); */ |
c906108c SS |
1373 | } |
1374 | ||
1375 | static void | |
fba45db2 | 1376 | bdm_read_register_command (char *args, int from_tty) |
c906108c SS |
1377 | { |
1378 | /* XXX repeat should go on to the next register */ | |
1379 | ||
1380 | if (!ocd_desc) | |
1381 | error ("Not connected to OCD device."); | |
1382 | ||
1383 | if (!args) | |
1384 | error ("Must specify BDM register number."); | |
1385 | ||
1386 | } | |
1387 | \f | |
1388 | void | |
fba45db2 | 1389 | _initialize_remote_ocd (void) |
c906108c SS |
1390 | { |
1391 | extern struct cmd_list_element *cmdlist; | |
1392 | static struct cmd_list_element *ocd_cmd_list = NULL; | |
1393 | ||
1394 | add_show_from_set (add_set_cmd ("remotetimeout", no_class, | |
c5aa993b JM |
1395 | var_integer, (char *) &remote_timeout, |
1396 | "Set timeout value for remote read.\n", &setlist), | |
c906108c SS |
1397 | &showlist); |
1398 | ||
1399 | add_prefix_cmd ("ocd", class_obscure, bdm_command, "", &ocd_cmd_list, "ocd ", | |
1400 | 0, &cmdlist); | |
1401 | ||
1402 | add_cmd ("reset", class_obscure, bdm_reset_command, "", &ocd_cmd_list); | |
1403 | add_cmd ("restart", class_obscure, bdm_restart_command, "", &ocd_cmd_list); | |
1404 | add_cmd ("update-flash", class_obscure, bdm_update_flash_command, "", &ocd_cmd_list); | |
c5aa993b | 1405 | /* add_cmd ("read-register", class_obscure, bdm_read_register_command, "", &ocd_cmd_list); */ |
c906108c | 1406 | } |