avr/cmd_mem.c

   1 /*
   2  * (C) Copyright 2000
   3  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   4  *
   5  * SPDX-License-Identifier:     GPL-2.0+
   6  */
   7
   8 /*
   9  * Memory Functions
  10  *
  11  * Copied from FADS ROM, Dan Malek (dmalek@jlc.net)
  12  */
  13
  14 #include "common.h"
  15 #include <stdlib.h>
  16 #include <ctype.h>
  17
  18 #include "config.h"
  19 #include "debug.h"
  20 #include "command.h"
  21 #include "cli_readline.h"
  22 #include "con-utils.h"
  23 #include "z80-if.h"
  24
  25 /*
  26  * TODO: printf() --> printf_P()
  27  */
  28
  29 #ifndef CONFIG_SYS_MEMTEST_SCRATCH
  30 #define CONFIG_SYS_MEMTEST_SCRATCH 0
  31 #endif
  32
  33 static int mod_mem(cmd_tbl_t *, int, int, int, char * const []);
  34
  35 /* Display values from last command.
  36  * Memory modify remembered values are different from display memory.
  37  */
  38 static uint32_t dp_last_addr;
  39 static uint32_t dp_last_length = 0x100;
  40 static uint32_t mm_last_addr;
  41
  42 static  uint32_t        base_address = 0;
  43
  44 /*--------------------------------------------------------------------------*/
  45
  46 static void print_blanks(uint_fast8_t count)
  47 {
  48         while(count--)
  49                 putchar(' ');
  50 }
  51
  52 int z180_dump_mem(uint32_t startaddr, uint32_t len, const char *title)
  53 {
  54         uint8_t buf[16];
  55         uint8_t llen = 16;
  56         uint8_t pre = startaddr % 16;
  57         uint32_t addr = startaddr & ~0x0f;
  58         len += pre;
  59         uint8_t i;
  60
  61         if (title && *title)
  62                 printf_P(PSTR("%s\n"),title);
  63
  64         while (len) {
  65                 if (len < 16)
  66                         llen = len;
  67
  68                 z80_request_bus();
  69                 for (i = pre; i < llen; i++)
  70                         buf[i] = z80_read(addr + i);
  71                 z80_release_bus();
  72
  73                 printf_P(PSTR("%.5lx:"), addr);
  74 #if 0
  75                 print_blanks(3 * pre);
  76
  77                 /* Print hex values */
  78                 for (i = pre; i < llen; i++)
  79                         printf_P(PSTR(" %.2x"), buf[i]);
  80 #else
  81                 for (i = 0; i < llen; i++) {
  82                         if ((i % 8) == 0)
  83                                 putchar(' ');
  84                         if (i < pre)
  85                                 printf_P(PSTR(".. "));
  86                         else
  87                                 printf_P(PSTR("%.2x "), buf[i]);
  88                 }
  89 #endif
  90                 /* fill line with whitespace for nice ASCII print */
  91 #if 1
  92                 print_blanks(3 * (16u - i) + (16u-i)/8 + 1 + pre);
  93 #else
  94
  95 #endif
  96                 /* Print data in ASCII characters */
  97                 for (i = pre; i < llen; i++)
  98                         printf_P(PSTR("%c"), isprint(buf[i]) ? buf[i] : '.');
  99                 putchar('\n');
 100
 101                 pre = 0;
 102                 addr += 16;
 103                 len -= llen;
 104
 105                 if (ctrlc())
 106                         return -1;
 107         }
 108         return 0;
 109 }
 110
 111
 112 /*--------------------------------------------------------------------------*/
 113
 114 /* Memory Display
 115  *
 116  * Syntax:
 117  *      md {addr} {len}
 118  */
 119 int do_mem_md(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 120 {
 121         uint32_t addr, length;
 122
 123         (void) cmdtp;
 124
 125 #if 0
 126         printf_P(PSTR("flag: %d, argc: %d"), flag, argc);
 127         for (int i = 0; i < argc; i++) {
 128                 printf_P(PSTR(", argv[%d]: %s"), i, argv[i] ? argv[i] : "<NULL>");
 129         }
 130         putchar('\n');
 131 #endif
 132
 133         /* We use the last specified parameters, unless new ones are
 134          * entered.
 135          */
 136         addr = dp_last_addr;
 137         length = dp_last_length;
 138
 139         if (argc < 2)
 140                 return CMD_RET_USAGE;
 141
 142         if ((flag & CMD_FLAG_REPEAT) == 0) {
 143                 /* Address is specified since argc > 1 */
 144                 addr = strtoul(argv[1], NULL, 16);
 145                 addr += base_address;
 146
 147                 /* If another parameter, it is the length to display. */
 148                 if (argc > 2)
 149                         length = strtoul(argv[2], NULL, 16);
 150         }
 151
 152         /* Print the lines. */
 153         z180_dump_mem(addr, length, NULL);
 154
 155         dp_last_addr = addr + length;
 156         dp_last_length = length;
 157         return 0;
 158 }
 159
 160 int do_mem_mm(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 161 {
 162         return mod_mem (cmdtp, 1, flag, argc, argv);
 163 }
 164 int do_mem_nm(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 165 {
 166         return mod_mem (cmdtp, 0, flag, argc, argv);
 167 }
 168
 169 int do_mem_mw(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 170 {
 171         uint8_t writeval;
 172         uint32_t addr, count;
 173
 174         (void) cmdtp;
 175         (void) flag;
 176
 177         if ((argc < 3) || (argc > 4))
 178                 return CMD_RET_USAGE;
 179
 180         /* Address is specified since argc > 1
 181         */
 182         addr = strtoul(argv[1], NULL, 16);
 183         addr += base_address;
 184
 185         /* Get the value to write.
 186         */
 187         writeval = (uint8_t) strtoul(argv[2], NULL, 16);
 188
 189         /* Count ? */
 190         if (argc == 4) {
 191                 count = strtoul(argv[3], NULL, 16);
 192         } else {
 193                 count = 1;
 194         }
 195
 196         z80_request_bus();
 197         while (count-- > 0) {
 198                 z80_write(addr, writeval);
 199                 ++addr;
 200         }
 201         z80_release_bus();
 202
 203         return 0;
 204 }
 205
 206 #ifdef CONFIG_MX_CYCLIC
 207 int do_mem_mdc ( cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 208 {
 209         int i;
 210         uint32_t count;
 211
 212         if (argc < 4)
 213                 return CMD_RET_USAGE;
 214
 215         count = strtoul(argv[3], NULL, 10);
 216
 217         for (;;) {
 218                 do_mem_md (NULL, 0, 3, argv);
 219
 220                 /* delay for <count> ms... */
 221 /* TODO: use timer */
 222                 for (i=0; i<count; i++)
 223                         udelay (1000);
 224
 225                 /* check for ctrl-c to abort... */
 226                 if (ctrlc()) {
 227                         my_puts("Abort\n");
 228                         return 0;
 229                 }
 230         }
 231
 232         return 0;
 233 }
 234
 235 int do_mem_mwc ( cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 236 {
 237         int i;
 238         uint32_t count;
 239
 240         if (argc < 4)
 241                 return CMD_RET_USAGE;
 242
 243         count = strtoul(argv[3], NULL, 10);
 244
 245         for (;;) {
 246                 do_mem_mw (NULL, 0, 3, argv);
 247
 248                 /* delay for <count> ms... */
 249 /* TODO: use timer */
 250                 for (i=0; i<count; i++)
 251                         udelay (1000);
 252
 253                 /* check for ctrl-c to abort... */
 254                 if (ctrlc()) {
 255                         my_puts("Abort\n");
 256                         return 0;
 257                 }
 258         }
 259
 260         return 0;
 261 }
 262 #endif /* CONFIG_MX_CYCLIC */
 263
 264 int do_mem_cmp(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 265 {
 266         uint32_t addr1, addr2, count, ngood;
 267         int rcode = 0;
 268         uint8_t byte1, byte2;
 269
 270         (void) cmdtp;
 271         (void) flag;
 272
 273         if (argc != 4)
 274                 return CMD_RET_USAGE;
 275
 276
 277         addr1 = strtoul(argv[1], NULL, 16);
 278         addr1 += base_address;
 279         addr2 = strtoul(argv[2], NULL, 16);
 280         addr2 += base_address;
 281         count = strtoul(argv[3], NULL, 16);
 282
 283         for (ngood = 0; ngood < count; ++ngood) {
 284                 z80_request_bus();
 285                 byte1 = z80_read(addr1);
 286                 byte2 = z80_read(addr2);
 287                 z80_release_bus();
 288                 if (byte1 != byte2) {
 289                         printf( "byte at 0x%05lx (%#02x) != "
 290                                 "byte at 0x%05lx (%#02x)\n",
 291                                 addr1, byte1, addr2, byte2);
 292                         rcode = 1;
 293                         break;
 294                 }
 295                 addr1++;
 296                 addr2++;
 297
 298                 /* check for ctrl-c to abort... */
 299                 if (ctrlc()) {
 300                         my_puts("Abort\n");
 301                         return 0;
 302                 }
 303         }
 304
 305         printf("Total of %ld byte(s) (0x%lx) were the same\n", ngood, ngood);
 306         return rcode;
 307 }
 308
 309 int do_mem_cp(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 310 {
 311         uint32_t src, dest, count;
 312         int_fast8_t step;
 313
 314         (void) cmdtp;
 315         (void) flag;
 316
 317         if (argc != 4)
 318                 return CMD_RET_USAGE;
 319
 320         src = strtoul(argv[1], NULL, 16);
 321         src += base_address;
 322         dest = strtoul(argv[2], NULL, 16);
 323         dest += base_address;
 324         count = strtoul(argv[3], NULL, 16);
 325
 326         if (count == 0) {
 327                 my_puts ("Zero length ???\n");
 328                 return 1;
 329         }
 330
 331         if (dest > src) {
 332                 src += count - 1;
 333                 dest += count - 1;
 334                 step = -1;
 335         } else
 336                 step = 1;
 337
 338         while (count-- > 0) {
 339                 uint8_t data;
 340                 z80_request_bus();
 341                 data = z80_read(src);
 342                 z80_write(dest, data);
 343                 z80_release_bus();
 344                 src += step;
 345                 dest += step;
 346
 347                 /* check for ctrl-c to abort... */
 348                 if (ctrlc()) {
 349                         my_puts("Abort\n");
 350                         return 0;
 351                 }
 352         }
 353         return 0;
 354 }
 355
 356 int do_mem_base(cmd_tbl_t *cmdtp, int flag, int argc,
 357                        char * const argv[])
 358 {
 359         (void) cmdtp;
 360         (void) flag;
 361
 362         if (argc > 1) {
 363                 /* Set new base address. */
 364                 base_address = strtoul(argv[1], NULL, 16);
 365         }
 366         /* Print the current base address. */
 367         printf("Base Address: 0x%05lx\n", base_address);
 368         return 0;
 369 }
 370
 371 int do_mem_loop(cmd_tbl_t *cmdtp, int flag, int argc,
 372                        char * const argv[])
 373 {
 374         uint32_t addr, length;
 375
 376         (void) cmdtp;
 377         (void) flag;
 378
 379         if (argc < 3)
 380                 return CMD_RET_USAGE;
 381
 382         /* Address is always specified. */
 383         addr = strtoul(argv[1], NULL, 16);
 384
 385         /* Length is the number of bytes. */
 386         length = strtoul(argv[2], NULL, 16);
 387
 388
 389         /* We want to optimize the loops to run as fast as possible.
 390          * If we have only one object, just run infinite loops.
 391          */
 392         if (length == 1) {
 393                 z80_request_bus();
 394                 for (;;)
 395                         z80_read(addr);
 396                 z80_release_bus();
 397         }
 398
 399         z80_request_bus();
 400         for (;;) {
 401                 uint32_t i = length;
 402                 uint32_t p = addr;
 403                 while (i-- > 0)
 404                         z80_read(p++);
 405         }
 406         z80_release_bus();
 407
 408         return 0;
 409 }
 410
 411 #ifdef CONFIG_LOOPW
 412 int do_mem_loopw (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 413 {
 414         uint32_t addr, length;
 415         uint8_t data;
 416
 417         (void) cmdtp;
 418         (void) flag;
 419
 420         if (argc < 4)
 421                 return CMD_RET_USAGE;
 422
 423         /* Address is always specified. */
 424         addr = strtoul(argv[1], NULL, 16);
 425
 426         /* Length is the number of bytes. */
 427         length = strtoul(argv[2], NULL, 16);
 428
 429         data = strtoul(argv[3], NULL, 16);
 430
 431         /* We want to optimize the loops to run as fast as possible.
 432          * If we have only one object, just run infinite loops.
 433          */
 434         if (length == 1) {
 435                 z80_request_bus();
 436                 for (;;)
 437                         z80_write(addr, data);
 438         }
 439
 440         for (;;) {
 441                 uint32_t i = length;
 442                 uint32_t p = addr;
 443                 while (i-- > 0)
 444                         z80_write(p++, data);
 445         }
 446 }
 447 #endif /* CONFIG_LOOPW */
 448
 449 #ifdef CONFIG_CMD_MEMTEST
 450 static uint32_t mem_test_alt(vu_long *buf, uint32_t start_addr, uint32_t end_addr,
 451                           vu_long *dummy)
 452 {
 453         vu_long *addr;
 454         uint32_t errs = 0;
 455         uint32_t val, readback;
 456         int j;
 457         vu_long offset;
 458         vu_long test_offset;
 459         vu_long pattern;
 460         vu_long temp;
 461         vu_long anti_pattern;
 462         vu_long num_words;
 463         static const FLASH uint32_t bitpattern[] = {
 464                 0x00000001,     /* single bit */
 465                 0x00000003,     /* two adjacent bits */
 466                 0x00000007,     /* three adjacent bits */
 467                 0x0000000F,     /* four adjacent bits */
 468                 0x00000005,     /* two non-adjacent bits */
 469                 0x00000015,     /* three non-adjacent bits */
 470                 0x00000055,     /* four non-adjacent bits */
 471                 0xaaaaaaaa,     /* alternating 1/0 */
 472         };
 473
 474         num_words = (end_addr - start_addr) / sizeof(vu_long);
 475
 476         /*
 477          * Data line test: write a pattern to the first
 478          * location, write the 1's complement to a 'parking'
 479          * address (changes the state of the data bus so a
 480          * floating bus doesn't give a false OK), and then
 481          * read the value back. Note that we read it back
 482          * into a variable because the next time we read it,
 483          * it might be right (been there, tough to explain to
 484          * the quality guys why it prints a failure when the
 485          * "is" and "should be" are obviously the same in the
 486          * error message).
 487          *
 488          * Rather than exhaustively testing, we test some
 489          * patterns by shifting '1' bits through a field of
 490          * '0's and '0' bits through a field of '1's (i.e.
 491          * pattern and ~pattern).
 492          */
 493         addr = buf;
 494         for (j = 0; j < sizeof(bitpattern) / sizeof(bitpattern[0]); j++) {
 495                 val = bitpattern[j];
 496                 for (; val != 0; val <<= 1) {
 497                         *addr = val;
 498                         *dummy  = ~val; /* clear the test data off the bus */
 499                         readback = *addr;
 500                         if (readback != val) {
 501                                 printf("FAILURE (data line): "
 502                                         "expected %05lx, actual %05lx\n",
 503                                                 val, readback);
 504                                 errs++;
 505                                 if (ctrlc())
 506                                         return -1;
 507                         }
 508                         *addr  = ~val;
 509                         *dummy  = val;
 510                         readback = *addr;
 511                         if (readback != ~val) {
 512                                 printf("FAILURE (data line): "
 513                                         "Is %05lx, should be %05lx\n",
 514                                                 readback, ~val);
 515                                 errs++;
 516                                 if (ctrlc())
 517                                         return -1;
 518                         }
 519                 }
 520         }
 521
 522         /*
 523          * Based on code whose Original Author and Copyright
 524          * information follows: Copyright (c) 1998 by Michael
 525          * Barr. This software is placed into the public
 526          * domain and may be used for any purpose. However,
 527          * this notice must not be changed or removed and no
 528          * warranty is either expressed or implied by its
 529          * publication or distribution.
 530          */
 531
 532         /*
 533         * Address line test
 534
 535          * Description: Test the address bus wiring in a
 536          *              memory region by performing a walking
 537          *              1's test on the relevant bits of the
 538          *              address and checking for aliasing.
 539          *              This test will find single-bit
 540          *              address failures such as stuck-high,
 541          *              stuck-low, and shorted pins. The base
 542          *              address and size of the region are
 543          *              selected by the caller.
 544
 545          * Notes:       For best results, the selected base
 546          *              address should have enough LSB 0's to
 547          *              guarantee single address bit changes.
 548          *              For example, to test a 64-Kbyte
 549          *              region, select a base address on a
 550          *              64-Kbyte boundary. Also, select the
 551          *              region size as a power-of-two if at
 552          *              all possible.
 553          *
 554          * Returns:     0 if the test succeeds, 1 if the test fails.
 555          */
 556         pattern = (vu_long) 0xaaaaaaaa;
 557         anti_pattern = (vu_long) 0x55555555;
 558
 559         debug("%s:%d: length = 0x%.5lx\n", __func__, __LINE__, num_words);
 560         /*
 561          * Write the default pattern at each of the
 562          * power-of-two offsets.
 563          */
 564         for (offset = 1; offset < num_words; offset <<= 1)
 565                 addr[offset] = pattern;
 566
 567         /*
 568          * Check for address bits stuck high.
 569          */
 570         test_offset = 0;
 571         addr[test_offset] = anti_pattern;
 572
 573         for (offset = 1; offset < num_words; offset <<= 1) {
 574                 temp = addr[offset];
 575                 if (temp != pattern) {
 576                         printf("\nFAILURE: Address bit stuck high @ 0x%.5lx:"
 577                                 " expected 0x%.5lx, actual 0x%.5lx\n",
 578                                 start_addr + offset*sizeof(vu_long),
 579                                 pattern, temp);
 580                         errs++;
 581                         if (ctrlc())
 582                                 return -1;
 583                 }
 584         }
 585         addr[test_offset] = pattern;
 586
 587         /*
 588          * Check for addr bits stuck low or shorted.
 589          */
 590         for (test_offset = 1; test_offset < num_words; test_offset <<= 1) {
 591                 addr[test_offset] = anti_pattern;
 592
 593                 for (offset = 1; offset < num_words; offset <<= 1) {
 594                         temp = addr[offset];
 595                         if ((temp != pattern) && (offset != test_offset)) {
 596                                 printf("\nFAILURE: Address bit stuck low or"
 597                                         " shorted @ 0x%.5lx: expected 0x%.5lx,"
 598                                         " actual 0x%.5lx\n",
 599                                         start_addr + offset*sizeof(vu_long),
 600                                         pattern, temp);
 601                                 errs++;
 602                                 if (ctrlc())
 603                                         return -1;
 604                         }
 605                 }
 606                 addr[test_offset] = pattern;
 607         }
 608
 609         /*
 610          * Description: Test the integrity of a physical
 611          *              memory device by performing an
 612          *              increment/decrement test over the
 613          *              entire region. In the process every
 614          *              storage bit in the device is tested
 615          *              as a zero and a one. The base address
 616          *              and the size of the region are
 617          *              selected by the caller.
 618          *
 619          * Returns:     0 if the test succeeds, 1 if the test fails.
 620          */
 621         num_words++;
 622
 623         /*
 624          * Fill memory with a known pattern.
 625          */
 626         for (pattern = 1, offset = 0; offset < num_words; pattern++, offset++) {
 627                 addr[offset] = pattern;
 628         }
 629
 630         /*
 631          * Check each location and invert it for the second pass.
 632          */
 633         for (pattern = 1, offset = 0; offset < num_words; pattern++, offset++) {
 634                 temp = addr[offset];
 635                 if (temp != pattern) {
 636                         printf("\nFAILURE (read/write) @ 0x%.5lx:"
 637                                 " expected 0x%.5lx, actual 0x%.5lx)\n",
 638                                 start_addr + offset*sizeof(vu_long),
 639                                 pattern, temp);
 640                         errs++;
 641                         if (ctrlc())
 642                                 return -1;
 643                 }
 644
 645                 anti_pattern = ~pattern;
 646                 addr[offset] = anti_pattern;
 647         }
 648
 649         /*
 650          * Check each location for the inverted pattern and zero it.
 651          */
 652         for (pattern = 1, offset = 0; offset < num_words; pattern++, offset++) {
 653                 WATCHDOG_RESET();
 654                 anti_pattern = ~pattern;
 655                 temp = addr[offset];
 656                 if (temp != anti_pattern) {
 657                         printf("\nFAILURE (read/write): @ 0x%.5lx:"
 658                                 " expected 0x%.5lx, actual 0x%.5lx)\n",
 659                                 start_addr + offset*sizeof(vu_long),
 660                                 anti_pattern, temp);
 661                         errs++;
 662                         if (ctrlc())
 663                                 return -1;
 664                 }
 665                 addr[offset] = 0;
 666         }
 667
 668         return 0;
 669 }
 670
 671 static uint32_t mem_test_quick(vu_long *buf, uint32_t start_addr, uint32_t end_addr,
 672                             vu_long pattern, int iteration)
 673 {
 674         vu_long *end;
 675         vu_long *addr;
 676         uint32_t errs = 0;
 677         uint32_t incr, length;
 678         uint32_t val, readback;
 679
 680         /* Alternate the pattern */
 681         incr = 1;
 682         if (iteration & 1) {
 683                 incr = -incr;
 684                 /*
 685                  * Flip the pattern each time to make lots of zeros and
 686                  * then, the next time, lots of ones.  We decrement
 687                  * the "negative" patterns and increment the "positive"
 688                  * patterns to preserve this feature.
 689                  */
 690                 if (pattern & 0x80000000)
 691                         pattern = -pattern;     /* complement & increment */
 692                 else
 693                         pattern = ~pattern;
 694         }
 695         length = (end_addr - start_addr) / sizeof(uint32_t);
 696         end = buf + length;
 697         printf("\rPattern %08lX  Writing..."
 698                 "%12s"
 699                 "\b\b\b\b\b\b\b\b\b\b",
 700                 pattern, "");
 701
 702         for (addr = buf, val = pattern; addr < end; addr++) {
 703                 *addr = val;
 704                 val += incr;
 705         }
 706
 707         my_puts("Reading...");
 708
 709         for (addr = buf, val = pattern; addr < end; addr++) {
 710                 readback = *addr;
 711                 if (readback != val) {
 712                         uint32_t offset = addr - buf;
 713
 714                         printf("\nMem error @ 0x%08X: "
 715                                 "found %08lX, expected %08lX\n",
 716                                 (unsigned int)(uintptr_t)(start_addr + offset*sizeof(vu_long)),
 717                                 readback, val);
 718                         errs++;
 719                         if (ctrlc())
 720                                 return -1;
 721                 }
 722                 val += incr;
 723         }
 724
 725         return 0;
 726 }
 727
 728 /*
 729  * Perform a memory test. A more complete alternative test can be
 730  * configured using CONFIG_SYS_ALT_MEMTEST. The complete test loops until
 731  * interrupted by ctrl-c or by a failure of one of the sub-tests.
 732  */
 733 int do_mem_mtest(cmd_tbl_t *cmdtp, int flag, int argc,
 734                         char * const argv[])
 735 {
 736         uint32_t start, end;
 737         vu_long *buf, *dummy;
 738         int iteration_limit;
 739         int ret;
 740         uint32_t errs = 0;      /* number of errors, or -1 if interrupted */
 741         uint32_t pattern;
 742         int iteration;
 743 #if defined(CONFIG_SYS_ALT_MEMTEST)
 744         const int alt_test = 1;
 745 #else
 746         const int alt_test = 0;
 747 #endif
 748
 749         if (argc > 1)
 750                 start = strtoul(argv[1], NULL, 16);
 751         else
 752                 start = CONFIG_SYS_MEMTEST_START;
 753
 754         if (argc > 2)
 755                 end = strtoul(argv[2], NULL, 16);
 756         else
 757                 end = CONFIG_SYS_MEMTEST_END;
 758
 759         if (argc > 3)
 760                 pattern = (uint32_t)strtoul(argv[3], NULL, 16);
 761         else
 762                 pattern = 0;
 763
 764         if (argc > 4)
 765                 iteration_limit = (uint32_t)strtoul(argv[4], NULL, 16);
 766         else
 767                 iteration_limit = 0;
 768
 769         printf("Testing %08x ... %08x:\n", (unsigned int)start, (unsigned int)end);
 770         debug("%s:%d: start %#05lx end %#05lx\n", __func__, __LINE__,
 771               start, end);
 772
 773 /* TODO: */
 774 //      buf = map_sysmem(start, end - start);
 775 //      dummy = map_sysmem(CONFIG_SYS_MEMTEST_SCRATCH, sizeof(vu_long));
 776         for (iteration = 0;
 777                         !iteration_limit || iteration < iteration_limit;
 778                         iteration++) {
 779                 if (ctrlc()) {
 780                         errs = -1UL;
 781                         break;
 782                 }
 783
 784                 printf("Iteration: %6d\r", iteration + 1);
 785                 debug("\n");
 786                 if (alt_test) {
 787                         errs = mem_test_alt(buf, start, end, dummy);
 788                 } else {
 789                         errs = mem_test_quick(buf, start, end, pattern,
 790                                               iteration);
 791                 }
 792                 if (errs == -1UL)
 793                         break;
 794         }
 795
 796         if (errs == -1UL) {
 797                 /* Memory test was aborted - write a newline to finish off */
 798                 putc('\n');
 799                 ret = 1;
 800         } else {
 801                 printf("Tested %d iteration(s) with %lu errors.\n",
 802                         iteration, errs);
 803                 ret = errs != 0;
 804         }
 805
 806         return ret;     /* not reached */
 807 }
 808 #endif  /* CONFIG_CMD_MEMTEST */
 809
 810 /* Modify memory.
 811  *
 812  * Syntax:
 813  *      mm {addr}
 814  *      nm {addr}
 815  */
 816 static int
 817 mod_mem(cmd_tbl_t *cmdtp, int incrflag, int flag, int argc, char * const argv[])
 818 {
 819         uint32_t addr;
 820         uint8_t data;
 821         int nbytes;
 822
 823         (void) cmdtp;
 824
 825         if (argc != 2)
 826                 return CMD_RET_USAGE;
 827
 828         /* We use the last specified parameters, unless new ones are
 829          * entered.
 830          */
 831         addr = mm_last_addr;
 832
 833         if ((flag & CMD_FLAG_REPEAT) == 0) {
 834                 /* New command specified.
 835                  */
 836
 837                 /* Address is specified since argc > 1
 838                 */
 839                 addr = strtoul(argv[1], NULL, 16);
 840                 addr += base_address;
 841         }
 842
 843         /* Print the address, followed by value.  Then accept input for
 844          * the next value.  A non-converted value exits.
 845          */
 846         do {
 847                 z80_request_bus();
 848                 data = z80_read(addr);
 849                 printf("%05lx: %02x", addr, data);
 850                 z80_release_bus();
 851
 852                 nbytes = cli_readline(PSTR(" ? "));
 853                 if (nbytes == 0 || (nbytes == 1 && console_buffer[0] == '-')) {
 854                         /* <CR> pressed as only input, don't modify current
 855                          * location and move to next. "-" pressed will go back.
 856                          */
 857                         if (incrflag)
 858                                 addr += nbytes ? -1 : 1;
 859                         nbytes = 1;
 860                 }
 861                 else {
 862                         char *endp;
 863                         data = strtoul(console_buffer, &endp, 16);
 864                         nbytes = endp - console_buffer;
 865                         if (nbytes) {
 866                                 z80_request_bus();
 867                                 z80_write(addr, data);
 868                                 z80_release_bus();
 869                                 if (incrflag)
 870                                         addr++;
 871                         }
 872                 }
 873         } while (nbytes);
 874
 875         mm_last_addr = addr;
 876         return 0;
 877 }
 878