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   1 /*
   2  * Copyright © 2008 Keith Packard <keithp@keithp.com>
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; either version 2 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful, but
  10  * WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License along
  15  * with this program; if not, write to the Free Software Foundation, Inc.,
  16  * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
  17  */
  18
  19 #include "ao-dbg.h"
  20
  21 static uint16_t start_address;
  22
  23 static enum command_result
  24 parse_int(char *value, int *result)
  25 {
  26         char *endptr;
  27
  28         *result = strtol(value, &endptr, 0);
  29         if (endptr == value)
  30                 return command_syntax;
  31         return command_success;
  32 }
  33
  34 static enum command_result
  35 parse_uint16(char *value, uint16_t *uint16)
  36 {
  37         int     v;
  38         enum command_result result;
  39
  40         result = parse_int(value, &v);
  41         if (result != command_success)
  42                 return command_error;
  43         if (v < 0 || v > 0xffff)
  44                 return command_error;
  45         *uint16 = v;
  46         return command_success;
  47 }
  48
  49 static enum command_result
  50 parse_uint8(char *value, uint8_t *uint8)
  51 {
  52         int     v;
  53         enum command_result result;
  54
  55         result = parse_int(value, &v);
  56         if (result != command_success)
  57                 return command_error;
  58         if (v < 0 || v > 0xff)
  59                 return command_error;
  60         *uint8 = v;
  61         return command_success;
  62 }
  63
  64 enum command_result
  65 command_quit (int argc, char **argv)
  66 {
  67         ccdbg_reset(s51_dbg);
  68         exit(0);
  69         return command_error;
  70 }
  71
  72 static void
  73 dump_bytes(uint8_t *memory, int length, uint16_t start, char *format)
  74 {
  75         int group, i;
  76
  77         for (group = 0; group < length; group += 8) {
  78                 s51_printf(format, start + group);
  79                 for (i = group; i < length && i < group + 8; i++)
  80                         s51_printf("%02x ", memory[i]);
  81                 for (; i < group + 8; i++)
  82                         s51_printf("   ");
  83                 for (i = group; i < length && i < group + 8; i++) {
  84                         if (isascii(memory[i]) && isprint(memory[i]))
  85                                 s51_printf("%c", memory[i]);
  86                         else
  87                                 s51_printf(".");
  88                 }
  89                 s51_printf("\n");
  90         }
  91 }
  92
  93 enum command_result
  94 command_di (int argc, char **argv)
  95 {
  96         uint16_t start, end;
  97         uint8_t memory[65536];
  98         uint8_t status;
  99         int length;
 100
 101         if (argc != 3)
 102                 return command_error;
 103         if (parse_uint16(argv[1], &start) != command_success)
 104                 return command_error;
 105         if (parse_uint16(argv[2], &end) != command_success)
 106                 return command_error;
 107         length = (int) end - (int) start + 1;
 108         status = ccdbg_read_memory(s51_dbg, start + 0xff00, memory, length);
 109         (void) status;
 110         dump_bytes(memory, length, start, "0x%02x ");
 111         return command_success;
 112 }
 113
 114 enum command_result
 115 command_ds (int argc, char **argv)
 116 {
 117         uint8_t start, end;
 118         uint8_t memory[0x100];
 119         uint8_t status;
 120         int length;
 121
 122         if (argc != 3)
 123                 return command_error;
 124         if (parse_uint8(argv[1], &start) != command_success)
 125                 return command_error;
 126         if (parse_uint8(argv[2], &end) != command_success)
 127                 return command_error;
 128         length = (int) end - (int) start + 1;
 129         status = ccdbg_read_sfr(s51_dbg, start, memory, length);
 130         (void) status;
 131         dump_bytes(memory, length, start, "0x%02x ");
 132         return command_success;
 133 }
 134
 135 enum command_result
 136 command_dx (int argc, char **argv)
 137 {
 138         uint16_t start, end;
 139         uint8_t memory[65536];
 140         uint8_t status;
 141         int length;
 142
 143         if (argc != 3)
 144                 return command_error;
 145         if (parse_uint16(argv[1], &start) != command_success)
 146                 return command_error;
 147         if (parse_uint16(argv[2], &end) != command_success)
 148                 return command_error;
 149         length = (int) end - (int) start + 1;
 150         status = ccdbg_read_memory(s51_dbg, start, memory, length);
 151         (void) status;
 152         dump_bytes(memory, length, start, "0x%04x ");
 153         return command_success;
 154 }
 155
 156 enum command_result
 157 command_set (int argc, char **argv)
 158 {
 159         uint16_t address;
 160         uint8_t *data;
 161         int len = argc - 3;
 162         int i;
 163         enum command_result ret = command_success;
 164
 165         if (len < 0)
 166                 return command_error;
 167         if (parse_uint16(argv[2], &address) != command_success)
 168                 return command_error;
 169         if (len == 0)
 170                 return command_success;
 171         data = malloc(len);
 172         if (!data)
 173                 return command_error;
 174         for (i = 0; i < len; i++)
 175                 if (parse_uint8(argv[i+3], &data[i]) != command_success)
 176                         return command_error;
 177
 178         if (strcmp(argv[1], "xram") == 0) {
 179                 ccdbg_write_memory(s51_dbg, address, data, len);
 180         } else if (strcmp(argv[1], "iram") == 0) {
 181                 ccdbg_write_memory(s51_dbg, address + 0xff00, data, len);
 182         } else if (strcmp(argv[1], "sfr") == 0) {
 183                 ccdbg_write_sfr(s51_dbg, (uint8_t) address, data, len);
 184         } else
 185                 ret = command_error;
 186         free(data);
 187         return ret;
 188 }
 189
 190 enum command_result
 191 command_dump (int argc, char **argv)
 192 {
 193         if (argv[1]) {
 194                 if (strcmp(argv[1], "rom") == 0 ||
 195                     strcmp(argv[1], "xram") == 0)
 196                         return command_dx(argc-1, argv+1);
 197                 if (strcmp(argv[1], "iram") == 0)
 198                         return command_di(argc-1, argv+1);
 199                 if (strcmp(argv[1], "sfr") == 0)
 200                         return command_ds(argc-1, argv+1);
 201         }
 202         return command_error;
 203 }
 204
 205 enum command_result
 206 command_file (int argc, char **argv)
 207 {
 208         struct ao_hex_file *hex;
 209         struct ao_hex_image *image;
 210         FILE *file;
 211
 212         if (argc != 2)
 213                 return command_error;
 214         file = fopen (argv[1], "r");
 215         if (!file)
 216                 return command_error;
 217         hex = ao_hex_file_read(file, argv[1]);
 218         fclose(file);
 219         if (!hex)
 220                 return command_error;
 221         if (hex->nrecord == 0) {
 222                 ao_hex_file_free(hex);
 223                 return command_error;
 224         }
 225         image = ao_hex_image_create(hex);
 226         ao_hex_file_free(hex);
 227         start_address = image->address;
 228         ccdbg_set_rom(s51_dbg, image);
 229         return command_success;
 230 }
 231
 232 enum command_result
 233 command_pc (int argc, char **argv)
 234 {
 235         uint16_t        pc;
 236         if (argv[1]) {
 237                 enum command_result result;
 238                 result = parse_uint16(argv[1], &pc);
 239                 if (result != command_success)
 240                         return result;
 241                 ccdbg_set_pc(s51_dbg, pc);
 242         } else {
 243                 pc = ccdbg_get_pc(s51_dbg);
 244                 s51_printf("   0x%04x 00\n", pc);
 245         }
 246         return command_success;
 247 }
 248
 249 struct cc_break {
 250         int             enabled;
 251         int             temporary;
 252         uint16_t        address;
 253 };
 254
 255 #define CC_NUM_BREAKPOINTS 4
 256
 257 static struct cc_break  breakpoints[CC_NUM_BREAKPOINTS];
 258
 259 static void
 260 disable_breakpoint(int b)
 261 {
 262         uint8_t status;
 263
 264         status = ccdbg_set_hw_brkpnt(s51_dbg, b, 0, breakpoints[b].address);
 265         if (status != 0x00 && status != 0xff)
 266                 s51_printf("disable_breakpoint status 0x%02x\n", status);
 267 }
 268
 269 static void
 270 enable_breakpoint(int b)
 271 {
 272         uint8_t status;
 273
 274         status = ccdbg_set_hw_brkpnt(s51_dbg, b, 1, breakpoints[b].address);
 275         if (status != 0xff)
 276                 s51_printf("enable_breakpoint status 0x%02x\n", status);
 277 }
 278
 279 static void
 280 enable_breakpoints(void)
 281 {
 282         int b;
 283         for (b = 0; b < CC_NUM_BREAKPOINTS; b++)
 284                 if (breakpoints[b].enabled)
 285                         enable_breakpoint(b);
 286 }
 287
 288 static enum command_result
 289 set_breakpoint(uint16_t address, int temporary)
 290 {
 291         int b;
 292         for (b = 0; b < CC_NUM_BREAKPOINTS; b++) {
 293                 if (breakpoints[b].enabled == 0)
 294                         break;
 295                 if (breakpoints[b].address == address)
 296                         break;
 297         }
 298         if (b == CC_NUM_BREAKPOINTS) {
 299                 s51_printf("Error: too many breakpoints requested\n");
 300                 return command_success;
 301         }
 302         if (breakpoints[b].enabled == 0) {
 303                 breakpoints[b].address = address;
 304                 enable_breakpoint(b);
 305         }
 306         ++breakpoints[b].enabled;
 307         s51_printf("Breakpoint %d at 0x%04x\n", b, address);
 308         breakpoints[b].temporary += temporary;
 309         return command_success;
 310 }
 311
 312 static enum command_result
 313 clear_breakpoint(uint16_t address, int temporary)
 314 {
 315         int b;
 316
 317         for (b = 0; b < CC_NUM_BREAKPOINTS; b++) {
 318                 if (breakpoints[b].enabled != 0 &&
 319                     ((breakpoints[b].temporary != 0) == (temporary != 0)) &&
 320                     breakpoints[b].address == address)
 321                         break;
 322         }
 323         if (b == CC_NUM_BREAKPOINTS) {
 324                 s51_printf("Error: no matching breakpoint found\n");
 325                 return command_success;
 326         }
 327         --breakpoints[b].enabled;
 328         breakpoints[b].temporary -= temporary;
 329         if (breakpoints[b].enabled == 0) {
 330                 disable_breakpoint(b);
 331                 breakpoints[b].address = -1;
 332         }
 333         return command_success;
 334 }
 335
 336
 337 static int
 338 find_breakpoint(uint16_t address)
 339 {
 340         int b;
 341
 342         for (b = 0; b < CC_NUM_BREAKPOINTS; b++)
 343                 if (breakpoints[b].enabled && breakpoints[b].address == address)
 344                         break;
 345         if (b == CC_NUM_BREAKPOINTS)
 346                 return -1;
 347         return b;
 348 }
 349
 350 enum command_result
 351 command_break (int argc, char **argv)
 352 {
 353         int b;
 354         uint16_t address;
 355         enum command_result result;
 356
 357         if (argc == 1) {
 358                 for (b = 0; b < CC_NUM_BREAKPOINTS; b++)
 359                         if (breakpoints[b].enabled)
 360                                 s51_printf("Breakpoint %d 0x%04x\n",
 361                                         b, breakpoints[b].address);
 362                 return command_success;
 363         }
 364         if (argc != 2)
 365                 return command_error;
 366         result = parse_uint16(argv[1], &address);
 367         if (result != command_success)
 368                 return result;
 369
 370         return set_breakpoint(address, 0);
 371 }
 372
 373 enum command_result
 374 command_clear (int argc, char **argv)
 375 {
 376         uint16_t address;
 377         enum command_result result;
 378
 379         if (argc != 2)
 380                 return command_error;
 381         result = parse_uint16(argv[1], &address);
 382         if (result != command_success)
 383                 return result;
 384         return clear_breakpoint(address, 0);
 385 }
 386
 387 static void
 388 cc_stopped(uint8_t status)
 389 {
 390         uint16_t pc;
 391         int b;
 392         int code;
 393         char *reason;
 394
 395         pc = ccdbg_get_pc(s51_dbg);
 396         if (status & CC_STATUS_CPU_HALTED) {
 397                 if ((status & CC_STATUS_HALT_STATUS) != 0) {
 398                         pc = pc - 1;
 399                         code = 104;
 400                         reason = "Breakpoint";
 401                         b = find_breakpoint(pc);
 402                         if (b != -1 && breakpoints[b].temporary)
 403                                 clear_breakpoint(pc, 1);
 404                         ccdbg_set_pc(s51_dbg, pc);
 405                 } else {
 406                         code = 105;
 407                         reason = "Interrupt";
 408                 }
 409                 s51_printf("Stop at 0x%04x: (%d) %s\n",
 410                         pc, code, reason);
 411         }
 412 }
 413
 414 static uint8_t
 415 cc_step(uint16_t pc)
 416 {
 417         int b;
 418         uint8_t status;
 419
 420         b = find_breakpoint(pc);
 421         if (b != -1)
 422                 disable_breakpoint(b);
 423         status = ccdbg_step_instr(s51_dbg);
 424         if (b != -1)
 425                 enable_breakpoint(b);
 426         return status;
 427 }
 428
 429 enum command_result
 430 command_run (int argc, char **argv)
 431 {
 432         uint16_t start, end;
 433         enum command_result result;
 434         uint16_t pc;
 435         uint8_t status;
 436         int b;
 437
 438         if (argv[1]) {
 439                 result = parse_uint16(argv[1], &start);
 440                 if (result != command_success)
 441                         return result;
 442                 if (argv[2]) {
 443                         result = parse_uint16(argv[2], &end);
 444                         if (result != command_success)
 445                                 return result;
 446                 }
 447                 if (start_address && start == 0) {
 448                         start = start_address;
 449                         s51_printf("Starting at 0x%04x\n", start);
 450                 }
 451                 ccdbg_set_pc(s51_dbg, start);
 452         }
 453         else
 454                 start = ccdbg_get_pc(s51_dbg);
 455         s51_printf("Resume at 0x%04x\n", start);
 456         pc = start;
 457         b = find_breakpoint(pc);
 458         if (b != -1) {
 459                 cc_step(pc);
 460                 pc = ccdbg_get_pc(s51_dbg);
 461                 if (find_breakpoint(pc) != -1) {
 462                         status = ccdbg_read_status(s51_dbg);
 463                         cc_stopped(status);
 464                         return command_success;
 465                 }
 466         }
 467         ccdbg_resume(s51_dbg);
 468         result = cc_wait();
 469         return result;
 470 }
 471
 472 enum command_result
 473 command_next (int argc, char **argv)
 474 {
 475         return command_step(argc, argv);
 476 }
 477
 478 enum command_result
 479 command_step (int argc, char **argv)
 480 {
 481         uint16_t pc;
 482         uint8_t opcode;
 483         uint8_t a;
 484
 485         a = cc_step(ccdbg_get_pc(s51_dbg));
 486         s51_printf(" ACC= 0x%02x\n", a);
 487         pc = ccdbg_get_pc(s51_dbg);
 488         ccdbg_read_memory(s51_dbg, pc, &opcode, 1);
 489         s51_printf(" ? 0x%04x %02x\n", pc, opcode);
 490         return command_success;
 491 }
 492
 493 enum command_result
 494 command_load (int argc, char **argv)
 495 {
 496         char *filename = argv[1];
 497         FILE *file;
 498         struct ao_hex_file      *hex;
 499         struct ao_hex_image *image;
 500
 501         if (!filename)
 502                 return command_error;
 503         file = fopen(filename, "r");
 504         if (!file) {
 505                 perror(filename);
 506                 return command_error;
 507         }
 508         hex = ao_hex_file_read(file, filename);
 509         fclose(file);
 510         if (!hex) {
 511                 return command_error;
 512         }
 513         image = ao_hex_image_create(hex);
 514         ao_hex_file_free(hex);
 515         if (!image) {
 516                 fprintf(stderr, "image create failed\n");
 517                 return command_error;
 518         }
 519         if (image->address >= 0xf000) {
 520                 printf("Loading %d bytes to RAM at 0x%04x\n",
 521                        image->length, image->address);
 522                 ccdbg_write_hex_image(s51_dbg, image, 0);
 523         } else {
 524                 fprintf(stderr, "Can only load to RAM\n");
 525         }
 526         ao_hex_image_free(image);
 527         return command_success;
 528 }
 529
 530 enum command_result
 531 command_halt (int argc, char **argv)
 532 {
 533         uint16_t        pc;
 534         ccdbg_halt(s51_dbg);
 535         pc = ccdbg_get_pc(s51_dbg);
 536         s51_printf("Halted at 0x%04x\n", pc);
 537         return command_success;
 538 }
 539
 540 enum command_result
 541 command_stop (int argc, char **argv)
 542 {
 543         return command_success;
 544 }
 545
 546 enum command_result
 547 command_reset (int argc, char **argv)
 548 {
 549         ccdbg_debug_mode(s51_dbg);
 550         ccdbg_halt(s51_dbg);
 551         enable_breakpoints();
 552         return command_success;
 553 }
 554
 555 enum command_result
 556 command_status(int argc, char **argv)
 557 {
 558         uint8_t status;
 559
 560         status = ccdbg_read_status(s51_dbg);
 561         if ((status & CC_STATUS_CHIP_ERASE_DONE) == 0)
 562                 s51_printf("\tChip erase in progress\n");
 563         if (status & CC_STATUS_PCON_IDLE)
 564                 s51_printf("\tCPU is idle (clock gated)\n");
 565         if (status & CC_STATUS_CPU_HALTED)
 566                 s51_printf("\tCPU halted\n");
 567         else
 568                 s51_printf("\tCPU running\n");
 569         if ((status & CC_STATUS_POWER_MODE_0) == 0)
 570                 s51_printf("\tPower Mode 1-3 selected\n");
 571         if (status & CC_STATUS_HALT_STATUS)
 572                 s51_printf("\tHalted by software or hw breakpoint\n");
 573         else
 574                 s51_printf("\tHalted by debug command\n");
 575         if (status & CC_STATUS_DEBUG_LOCKED)
 576                 s51_printf("\tDebug interface is locked\n");
 577         if ((status & CC_STATUS_OSCILLATOR_STABLE) == 0)
 578                 s51_printf("\tOscillators are not stable\n");
 579         if (status & CC_STATUS_STACK_OVERFLOW)
 580                 s51_printf("\tStack overflow\n");
 581         return command_success;
 582 }
 583
 584 static enum command_result
 585 info_breakpoints(int argc, char **argv)
 586 {
 587         int b;
 588
 589         if (argc == 1) {
 590                 s51_printf("Num Type       Disp Hit   Cnt   Address  What\n");
 591                 for (b = 0; b < CC_NUM_BREAKPOINTS; b++)
 592                         if (breakpoints[b].enabled) {
 593                                 s51_printf("%-3d fetch      %s 1     1     0x%04x   uc::disass() unimplemented\n",
 594                                            b,
 595                                            breakpoints[b].temporary ? "del " : "keep",
 596                                            breakpoints[b].address);
 597                         }
 598                 return command_success;
 599         }
 600         return command_syntax;
 601 }
 602
 603 static enum command_result
 604 info_help(int argc, char **argv);
 605
 606 static struct command_function infos[] = {
 607         { "breakpoints", "b", info_breakpoints, "[b]reakpoints",
 608                 "List current breakpoints\n" },
 609         { "help",   "?",  info_help,    "help",
 610                 "Print this list\n" },
 611
 612         { NULL, NULL, NULL, NULL, NULL },
 613 };
 614
 615 static enum command_result
 616 info_help(int argc, char **argv)
 617 {
 618         return command_function_help(infos, argc, argv);
 619 }
 620
 621 enum command_result
 622 command_info(int argc, char **argv)
 623 {
 624         struct command_function *func;
 625
 626         if (argc < 2)
 627                 return command_error;
 628         func = command_string_to_function(infos, argv[1]);
 629         if (!func)
 630                 return command_syntax;
 631         return (*func->func)(argc-1, argv+1);
 632 }
 633
 634 enum command_result
 635 cc_wait(void)
 636 {
 637         for(;;) {
 638                 uint8_t status;
 639                 status = ccdbg_read_status(s51_dbg);
 640                 if (status & CC_STATUS_CPU_HALTED) {
 641                         cc_stopped(status);
 642                         return command_success;
 643                 }
 644                 if (s51_interrupted || s51_check_input()) {
 645
 646                         ccdbg_halt(s51_dbg);
 647                         status = ccdbg_read_status(s51_dbg);
 648                         cc_stopped(status);
 649                         return command_interrupt;
 650                 }
 651         }
 652 }