cmd/mem.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * (C) Copyright 2000
   4  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   5  */
   6
   7 /*
   8  * Memory Functions
   9  *
  10  * Copied from FADS ROM, Dan Malek (dmalek@jlc.net)
  11  */
  12
  13 #include <console.h>
  14 #include <bootretry.h>
  15 #include <cli.h>
  16 #include <command.h>
  17 #include <console.h>
  18 #include <display_options.h>
  19 #ifdef CONFIG_MTD_NOR_FLASH
  20 #include <flash.h>
  21 #endif
  22 #include <hash.h>
  23 #include <log.h>
  24 #include <mapmem.h>
  25 #include <rand.h>
  26 #include <time.h>
  27 #include <watchdog.h>
  28 #include <asm/global_data.h>
  29 #include <asm/io.h>
  30 #include <linux/bitops.h>
  31 #include <linux/compiler.h>
  32 #include <linux/ctype.h>
  33 #include <linux/delay.h>
  34
  35 DECLARE_GLOBAL_DATA_PTR;
  36
  37 /* Create a compile-time value */
  38 #if MEM_SUPPORT_64BIT_DATA
  39 #define HELP_Q ", .q"
  40 #else
  41 #define HELP_Q ""
  42 #endif
  43
  44 static int mod_mem(struct cmd_tbl *, int, int, int, char * const []);
  45
  46 /* Display values from last command.
  47  * Memory modify remembered values are different from display memory.
  48  */
  49 static ulong    dp_last_addr, dp_last_size;
  50 static ulong    dp_last_length = 0x40;
  51 static ulong    mm_last_addr, mm_last_size;
  52
  53 static  ulong   base_address = 0;
  54 #ifdef CONFIG_CMD_MEM_SEARCH
  55 static ulong dp_last_ms_length;
  56 static u8 search_buf[64];
  57 static uint search_len;
  58 #endif
  59
  60 /* Memory Display
  61  *
  62  * Syntax:
  63  *      md{.b, .w, .l, .q} {addr} {len}
  64  */
  65 #define DISP_LINE_LEN   16
  66 static int do_mem_md(struct cmd_tbl *cmdtp, int flag, int argc,
  67                      char *const argv[])
  68 {
  69         ulong   addr, length, bytes;
  70         const void *buf;
  71         int     size;
  72         int rc = 0;
  73
  74         /* We use the last specified parameters, unless new ones are
  75          * entered.
  76          */
  77         addr = dp_last_addr;
  78         size = dp_last_size;
  79         length = dp_last_length;
  80
  81         if (argc < 2)
  82                 return CMD_RET_USAGE;
  83
  84         if ((flag & CMD_FLAG_REPEAT) == 0) {
  85                 /* New command specified.  Check for a size specification.
  86                  * Defaults to long if no or incorrect specification.
  87                  */
  88                 if ((size = cmd_get_data_size(argv[0], 4)) < 0)
  89                         return 1;
  90
  91                 /* Address is specified since argc > 1
  92                 */
  93                 addr = hextoul(argv[1], NULL);
  94                 addr += base_address;
  95
  96                 /* If another parameter, it is the length to display.
  97                  * Length is the number of objects, not number of bytes.
  98                  */
  99                 if (argc > 2)
 100                         length = hextoul(argv[2], NULL);
 101         }
 102
 103         bytes = size * length;
 104         buf = map_sysmem(addr, bytes);
 105
 106         /* Print the lines. */
 107         print_buffer(addr, buf, size, length, DISP_LINE_LEN / size);
 108         addr += bytes;
 109         unmap_sysmem(buf);
 110
 111         dp_last_addr = addr;
 112         dp_last_length = length;
 113         dp_last_size = size;
 114         return (rc);
 115 }
 116
 117 static int do_mem_mm(struct cmd_tbl *cmdtp, int flag, int argc,
 118                      char *const argv[])
 119 {
 120         return mod_mem (cmdtp, 1, flag, argc, argv);
 121 }
 122
 123 static int do_mem_nm(struct cmd_tbl *cmdtp, int flag, int argc,
 124                      char *const argv[])
 125 {
 126         return mod_mem (cmdtp, 0, flag, argc, argv);
 127 }
 128
 129 static int do_mem_mw(struct cmd_tbl *cmdtp, int flag, int argc,
 130                      char *const argv[])
 131 {
 132         ulong writeval;  /* 64-bit if MEM_SUPPORT_64BIT_DATA */
 133         ulong   addr, count;
 134         int     size;
 135         void *buf, *start;
 136         ulong bytes;
 137
 138         if ((argc < 3) || (argc > 4))
 139                 return CMD_RET_USAGE;
 140
 141         /* Check for size specification.
 142         */
 143         if ((size = cmd_get_data_size(argv[0], 4)) < 1)
 144                 return 1;
 145
 146         /* Address is specified since argc > 1
 147         */
 148         addr = hextoul(argv[1], NULL);
 149         addr += base_address;
 150
 151         /* Get the value to write.
 152         */
 153         if (MEM_SUPPORT_64BIT_DATA)
 154                 writeval = simple_strtoull(argv[2], NULL, 16);
 155         else
 156                 writeval = hextoul(argv[2], NULL);
 157
 158         /* Count ? */
 159         if (argc == 4) {
 160                 count = hextoul(argv[3], NULL);
 161         } else {
 162                 count = 1;
 163         }
 164
 165         bytes = size * count;
 166         start = map_sysmem(addr, bytes);
 167         buf = start;
 168         while (count-- > 0) {
 169                 if (size == 4)
 170                         *((u32 *)buf) = (u32)writeval;
 171                 else if (MEM_SUPPORT_64BIT_DATA && size == 8)
 172                         *((ulong *)buf) = writeval;
 173                 else if (size == 2)
 174                         *((u16 *)buf) = (u16)writeval;
 175                 else
 176                         *((u8 *)buf) = (u8)writeval;
 177                 buf += size;
 178         }
 179         unmap_sysmem(start);
 180         return 0;
 181 }
 182
 183 #ifdef CONFIG_CMD_MX_CYCLIC
 184 static int do_mem_mdc(struct cmd_tbl *cmdtp, int flag, int argc,
 185                       char *const argv[])
 186 {
 187         int i;
 188         ulong count;
 189
 190         if (argc < 4)
 191                 return CMD_RET_USAGE;
 192
 193         count = dectoul(argv[3], NULL);
 194
 195         for (;;) {
 196                 do_mem_md (NULL, 0, 3, argv);
 197
 198                 /* delay for <count> ms... */
 199                 for (i=0; i<count; i++)
 200                         udelay(1000);
 201
 202                 /* check for ctrl-c to abort... */
 203                 if (ctrlc()) {
 204                         puts("Abort\n");
 205                         return 0;
 206                 }
 207         }
 208
 209         return 0;
 210 }
 211
 212 static int do_mem_mwc(struct cmd_tbl *cmdtp, int flag, int argc,
 213                       char *const argv[])
 214 {
 215         int i;
 216         ulong count;
 217
 218         if (argc < 4)
 219                 return CMD_RET_USAGE;
 220
 221         count = dectoul(argv[3], NULL);
 222
 223         for (;;) {
 224                 do_mem_mw (NULL, 0, 3, argv);
 225
 226                 /* delay for <count> ms... */
 227                 for (i=0; i<count; i++)
 228                         udelay(1000);
 229
 230                 /* check for ctrl-c to abort... */
 231                 if (ctrlc()) {
 232                         puts("Abort\n");
 233                         return 0;
 234                 }
 235         }
 236
 237         return 0;
 238 }
 239 #endif /* CONFIG_CMD_MX_CYCLIC */
 240
 241 static int do_mem_cmp(struct cmd_tbl *cmdtp, int flag, int argc,
 242                       char *const argv[])
 243 {
 244         ulong   addr1, addr2, count, ngood, bytes;
 245         int     size;
 246         int     rcode = 0;
 247         const char *type;
 248         const void *buf1, *buf2, *base, *ptr1, *ptr2;
 249         ulong word1, word2;  /* 64-bit if MEM_SUPPORT_64BIT_DATA */
 250
 251         if (argc != 4)
 252                 return CMD_RET_USAGE;
 253
 254         /* Check for size specification.
 255         */
 256         if ((size = cmd_get_data_size(argv[0], 4)) < 0)
 257                 return 1;
 258         type = size == 8 ? "double word" :
 259                size == 4 ? "word" :
 260                size == 2 ? "halfword" : "byte";
 261
 262         addr1 = hextoul(argv[1], NULL);
 263         addr1 += base_address;
 264
 265         addr2 = hextoul(argv[2], NULL);
 266         addr2 += base_address;
 267
 268         count = hextoul(argv[3], NULL);
 269
 270         bytes = size * count;
 271         base = buf1 = map_sysmem(addr1, bytes);
 272         buf2 = map_sysmem(addr2, bytes);
 273         for (ngood = 0, ptr1 = buf1, ptr2 = buf2; ngood < count; ++ngood) {
 274                 if (size == 4) {
 275                         word1 = *(u32 *)ptr1;
 276                         word2 = *(u32 *)ptr2;
 277                 } else if (MEM_SUPPORT_64BIT_DATA && size == 8) {
 278                         word1 = *(ulong *)ptr1;
 279                         word2 = *(ulong *)ptr2;
 280                 } else if (size == 2) {
 281                         word1 = *(u16 *)ptr1;
 282                         word2 = *(u16 *)ptr2;
 283                 } else {
 284                         word1 = *(u8 *)ptr1;
 285                         word2 = *(u8 *)ptr2;
 286                 }
 287                 if (word1 != word2) {
 288                         ulong offset = ptr1 - base;
 289                         printf("%s at 0x%08lx (%#0*lx) != %s at 0x%08lx (%#0*lx)\n",
 290                                 type, (ulong)(addr1 + offset), size, word1,
 291                                 type, (ulong)(addr2 + offset), size, word2);
 292                         rcode = 1;
 293                         break;
 294                 }
 295
 296                 ptr1 += size;
 297                 ptr2 += size;
 298
 299                 /* reset watchdog from time to time */
 300                 if ((ngood % (64 << 10)) == 0)
 301                         schedule();
 302         }
 303         unmap_sysmem(buf1);
 304         unmap_sysmem(buf2);
 305
 306         printf("Total of %ld %s(s) were the same\n", ngood, type);
 307         return rcode;
 308 }
 309
 310 static int do_mem_cp(struct cmd_tbl *cmdtp, int flag, int argc,
 311                      char *const argv[])
 312 {
 313         ulong   addr, dest, count;
 314         void    *src, *dst;
 315         int     size;
 316
 317         if (argc != 4)
 318                 return CMD_RET_USAGE;
 319
 320         /* Check for size specification.
 321         */
 322         if ((size = cmd_get_data_size(argv[0], 4)) < 0)
 323                 return 1;
 324
 325         addr = hextoul(argv[1], NULL);
 326         addr += base_address;
 327
 328         dest = hextoul(argv[2], NULL);
 329         dest += base_address;
 330
 331         count = hextoul(argv[3], NULL);
 332
 333         if (count == 0) {
 334                 puts ("Zero length ???\n");
 335                 return 1;
 336         }
 337
 338         src = map_sysmem(addr, count * size);
 339         dst = map_sysmem(dest, count * size);
 340
 341 #ifdef CONFIG_MTD_NOR_FLASH
 342         /* check if we are copying to Flash */
 343         if (addr2info((ulong)dst)) {
 344                 int rc;
 345
 346                 puts ("Copy to Flash... ");
 347
 348                 rc = flash_write((char *)src, (ulong)dst, count * size);
 349                 if (rc != 0) {
 350                         flash_perror(rc);
 351                         unmap_sysmem(src);
 352                         unmap_sysmem(dst);
 353                         return (1);
 354                 }
 355                 puts ("done\n");
 356                 unmap_sysmem(src);
 357                 unmap_sysmem(dst);
 358                 return 0;
 359         }
 360 #endif
 361
 362         memmove(dst, src, count * size);
 363
 364         unmap_sysmem(src);
 365         unmap_sysmem(dst);
 366         return 0;
 367 }
 368
 369 #ifdef CONFIG_CMD_MEM_SEARCH
 370 static int do_mem_search(struct cmd_tbl *cmdtp, int flag, int argc,
 371                          char *const argv[])
 372 {
 373         ulong addr, length, bytes, offset;
 374         u8 *ptr, *end, *buf;
 375         bool quiet = false;
 376         ulong last_pos;         /* Offset of last match in 'size' units*/
 377         ulong last_addr;        /* Address of last displayed line */
 378         int limit = 10;
 379         int used_len;
 380         int count;
 381         int size;
 382         int i;
 383
 384         /* We use the last specified parameters, unless new ones are entered */
 385         addr = dp_last_addr;
 386         size = dp_last_size;
 387         length = dp_last_ms_length;
 388
 389         if (argc < 3)
 390                 return CMD_RET_USAGE;
 391
 392         if (!(flag & CMD_FLAG_REPEAT)) {
 393                 /*
 394                  * Check for a size specification.
 395                  * Defaults to long if no or incorrect specification.
 396                  */
 397                 size = cmd_get_data_size(argv[0], 4);
 398                 if (size < 0 && size != CMD_DATA_SIZE_STR)
 399                         return 1;
 400
 401                 argc--;
 402                 argv++;
 403                 while (argc && *argv[0] == '-') {
 404                         int ch = argv[0][1];
 405
 406                         if (ch == 'q')
 407                                 quiet = true;
 408                         else if (ch == 'l' && isxdigit(argv[0][2]))
 409                                 limit = hextoul(argv[0] + 2, NULL);
 410                         else
 411                                 return CMD_RET_USAGE;
 412                         argc--;
 413                         argv++;
 414                 }
 415
 416                 /* Address is specified since argc > 1 */
 417                 addr = hextoul(argv[0], NULL);
 418                 addr += base_address;
 419
 420                 /* Length is the number of objects, not number of bytes */
 421                 length = hextoul(argv[1], NULL);
 422
 423                 /* Read the bytes to search for */
 424                 end = search_buf + sizeof(search_buf);
 425                 for (i = 2, ptr = search_buf; i < argc && ptr < end; i++) {
 426                         if (MEM_SUPPORT_64BIT_DATA && size == 8) {
 427                                 u64 val = simple_strtoull(argv[i], NULL, 16);
 428
 429                                 *(u64 *)ptr = val;
 430                         } else if (size == -2) {  /* string */
 431                                 int len = min(strlen(argv[i]),
 432                                               (size_t)(end - ptr));
 433
 434                                 memcpy(ptr, argv[i], len);
 435                                 ptr += len;
 436                                 continue;
 437                         } else {
 438                                 u32 val = hextoul(argv[i], NULL);
 439
 440                                 switch (size) {
 441                                 case 1:
 442                                         *ptr = val;
 443                                         break;
 444                                 case 2:
 445                                         *(u16 *)ptr = val;
 446                                         break;
 447                                 case 4:
 448                                         *(u32 *)ptr = val;
 449                                         break;
 450                                 }
 451                         }
 452                         ptr += size;
 453                 }
 454                 search_len = ptr - search_buf;
 455         }
 456
 457         /* Do the search */
 458         if (size == -2)
 459                 size = 1;
 460         bytes = size * length;
 461         buf = map_sysmem(addr, bytes);
 462         last_pos = 0;
 463         last_addr = 0;
 464         count = 0;
 465         for (offset = 0;
 466              offset < bytes && offset <= bytes - search_len && count < limit;
 467              offset += size) {
 468                 void *ptr = buf + offset;
 469
 470                 if (!memcmp(ptr, search_buf, search_len)) {
 471                         uint align = (addr + offset) & 0xf;
 472                         ulong match = addr + offset;
 473
 474                         if (!count || (last_addr & ~0xf) != (match & ~0xf)) {
 475                                 if (!quiet) {
 476                                         if (count)
 477                                                 printf("--\n");
 478                                         print_buffer(match - align, ptr - align,
 479                                                      size,
 480                                                      ALIGN(search_len + align,
 481                                                            16) / size, 0);
 482                                 }
 483                                 last_addr = match;
 484                                 last_pos = offset / size;
 485                         }
 486                         count++;
 487                 }
 488         }
 489         if (!quiet) {
 490                 printf("%d match%s", count, count == 1 ? "" : "es");
 491                 if (count == limit)
 492                         printf(" (repeat command to check for more)");
 493                 printf("\n");
 494         }
 495         env_set_hex("memmatches", count);
 496         env_set_hex("memaddr", last_addr);
 497         env_set_hex("mempos", last_pos);
 498
 499         unmap_sysmem(buf);
 500
 501         used_len = offset / size;
 502         dp_last_addr = addr + used_len;
 503         dp_last_size = size;
 504         dp_last_ms_length = length < used_len ? 0 : length - used_len;
 505
 506         return count ? 0 : CMD_RET_FAILURE;
 507 }
 508 #endif
 509
 510 static int do_mem_base(struct cmd_tbl *cmdtp, int flag, int argc,
 511                        char *const argv[])
 512 {
 513         if (argc > 1) {
 514                 /* Set new base address.
 515                 */
 516                 base_address = hextoul(argv[1], NULL);
 517         }
 518         /* Print the current base address.
 519         */
 520         printf("Base Address: 0x%08lx\n", base_address);
 521         return 0;
 522 }
 523
 524 static int do_mem_loop(struct cmd_tbl *cmdtp, int flag, int argc,
 525                        char *const argv[])
 526 {
 527         ulong   addr, length, i, bytes;
 528         int     size;
 529         volatile ulong *llp;  /* 64-bit if MEM_SUPPORT_64BIT_DATA */
 530         volatile u32 *longp;
 531         volatile u16 *shortp;
 532         volatile u8 *cp;
 533         const void *buf;
 534
 535         if (argc < 3)
 536                 return CMD_RET_USAGE;
 537
 538         /*
 539          * Check for a size specification.
 540          * Defaults to long if no or incorrect specification.
 541          */
 542         if ((size = cmd_get_data_size(argv[0], 4)) < 0)
 543                 return 1;
 544
 545         /* Address is always specified.
 546         */
 547         addr = hextoul(argv[1], NULL);
 548
 549         /* Length is the number of objects, not number of bytes.
 550         */
 551         length = hextoul(argv[2], NULL);
 552
 553         bytes = size * length;
 554         buf = map_sysmem(addr, bytes);
 555
 556         /* We want to optimize the loops to run as fast as possible.
 557          * If we have only one object, just run infinite loops.
 558          */
 559         if (length == 1) {
 560                 if (MEM_SUPPORT_64BIT_DATA && size == 8) {
 561                         llp = (ulong *)buf;
 562                         for (;;)
 563                                 i = *llp;
 564                 }
 565                 if (size == 4) {
 566                         longp = (u32 *)buf;
 567                         for (;;)
 568                                 i = *longp;
 569                 }
 570                 if (size == 2) {
 571                         shortp = (u16 *)buf;
 572                         for (;;)
 573                                 i = *shortp;
 574                 }
 575                 cp = (u8 *)buf;
 576                 for (;;)
 577                         i = *cp;
 578         }
 579
 580         if (MEM_SUPPORT_64BIT_DATA && size == 8) {
 581                 for (;;) {
 582                         llp = (ulong *)buf;
 583                         i = length;
 584                         while (i-- > 0)
 585                                 *llp++;
 586                 }
 587         }
 588         if (size == 4) {
 589                 for (;;) {
 590                         longp = (u32 *)buf;
 591                         i = length;
 592                         while (i-- > 0)
 593                                 *longp++;
 594                 }
 595         }
 596         if (size == 2) {
 597                 for (;;) {
 598                         shortp = (u16 *)buf;
 599                         i = length;
 600                         while (i-- > 0)
 601                                 *shortp++;
 602                 }
 603         }
 604         for (;;) {
 605                 cp = (u8 *)buf;
 606                 i = length;
 607                 while (i-- > 0)
 608                         *cp++;
 609         }
 610         unmap_sysmem(buf);
 611
 612         return 0;
 613 }
 614
 615 #ifdef CONFIG_LOOPW
 616 static int do_mem_loopw(struct cmd_tbl *cmdtp, int flag, int argc,
 617                         char *const argv[])
 618 {
 619         ulong   addr, length, i, bytes;
 620         int     size;
 621         volatile ulong *llp;  /* 64-bit if MEM_SUPPORT_64BIT_DATA */
 622         ulong   data;    /* 64-bit if MEM_SUPPORT_64BIT_DATA */
 623         volatile u32 *longp;
 624         volatile u16 *shortp;
 625         volatile u8 *cp;
 626         void *buf;
 627
 628         if (argc < 4)
 629                 return CMD_RET_USAGE;
 630
 631         /*
 632          * Check for a size specification.
 633          * Defaults to long if no or incorrect specification.
 634          */
 635         if ((size = cmd_get_data_size(argv[0], 4)) < 0)
 636                 return 1;
 637
 638         /* Address is always specified.
 639         */
 640         addr = hextoul(argv[1], NULL);
 641
 642         /* Length is the number of objects, not number of bytes.
 643         */
 644         length = hextoul(argv[2], NULL);
 645
 646         /* data to write */
 647         if (MEM_SUPPORT_64BIT_DATA)
 648                 data = simple_strtoull(argv[3], NULL, 16);
 649         else
 650                 data = hextoul(argv[3], NULL);
 651
 652         bytes = size * length;
 653         buf = map_sysmem(addr, bytes);
 654
 655         /* We want to optimize the loops to run as fast as possible.
 656          * If we have only one object, just run infinite loops.
 657          */
 658         if (length == 1) {
 659                 if (MEM_SUPPORT_64BIT_DATA && size == 8) {
 660                         llp = (ulong *)buf;
 661                         for (;;)
 662                                 *llp = data;
 663                 }
 664                 if (size == 4) {
 665                         longp = (u32 *)buf;
 666                         for (;;)
 667                                 *longp = data;
 668                 }
 669                 if (size == 2) {
 670                         shortp = (u16 *)buf;
 671                         for (;;)
 672                                 *shortp = data;
 673                 }
 674                 cp = (u8 *)buf;
 675                 for (;;)
 676                         *cp = data;
 677         }
 678
 679         if (MEM_SUPPORT_64BIT_DATA && size == 8) {
 680                 for (;;) {
 681                         llp = (ulong *)buf;
 682                         i = length;
 683                         while (i-- > 0)
 684                                 *llp++ = data;
 685                 }
 686         }
 687         if (size == 4) {
 688                 for (;;) {
 689                         longp = (u32 *)buf;
 690                         i = length;
 691                         while (i-- > 0)
 692                                 *longp++ = data;
 693                 }
 694         }
 695         if (size == 2) {
 696                 for (;;) {
 697                         shortp = (u16 *)buf;
 698                         i = length;
 699                         while (i-- > 0)
 700                                 *shortp++ = data;
 701                 }
 702         }
 703         for (;;) {
 704                 cp = (u8 *)buf;
 705                 i = length;
 706                 while (i-- > 0)
 707                         *cp++ = data;
 708         }
 709 }
 710 #endif /* CONFIG_LOOPW */
 711
 712 #ifdef CONFIG_CMD_MEMTEST
 713 static ulong mem_test_alt(vu_long *buf, ulong start_addr, ulong end_addr,
 714                           vu_long *dummy)
 715 {
 716         vu_long *addr;
 717         ulong errs = 0;
 718         ulong val, readback;
 719         int j;
 720         vu_long offset;
 721         vu_long test_offset;
 722         vu_long pattern;
 723         vu_long temp;
 724         vu_long anti_pattern;
 725         vu_long num_words;
 726         static const ulong bitpattern[] = {
 727                 0x00000001,     /* single bit */
 728                 0x00000003,     /* two adjacent bits */
 729                 0x00000007,     /* three adjacent bits */
 730                 0x0000000F,     /* four adjacent bits */
 731                 0x00000005,     /* two non-adjacent bits */
 732                 0x00000015,     /* three non-adjacent bits */
 733                 0x00000055,     /* four non-adjacent bits */
 734                 0xaaaaaaaa,     /* alternating 1/0 */
 735         };
 736
 737         num_words = (end_addr - start_addr) / sizeof(vu_long);
 738
 739         /*
 740          * Data line test: write a pattern to the first
 741          * location, write the 1's complement to a 'parking'
 742          * address (changes the state of the data bus so a
 743          * floating bus doesn't give a false OK), and then
 744          * read the value back. Note that we read it back
 745          * into a variable because the next time we read it,
 746          * it might be right (been there, tough to explain to
 747          * the quality guys why it prints a failure when the
 748          * "is" and "should be" are obviously the same in the
 749          * error message).
 750          *
 751          * Rather than exhaustively testing, we test some
 752          * patterns by shifting '1' bits through a field of
 753          * '0's and '0' bits through a field of '1's (i.e.
 754          * pattern and ~pattern).
 755          */
 756         addr = buf;
 757         for (j = 0; j < sizeof(bitpattern) / sizeof(bitpattern[0]); j++) {
 758                 val = bitpattern[j];
 759                 for (; val != 0; val <<= 1) {
 760                         *addr = val;
 761                         *dummy  = ~val; /* clear the test data off the bus */
 762                         readback = *addr;
 763                         if (readback != val) {
 764                                 printf("FAILURE (data line): "
 765                                         "expected %08lx, actual %08lx\n",
 766                                                 val, readback);
 767                                 errs++;
 768                                 if (ctrlc())
 769                                         return -1;
 770                         }
 771                         *addr  = ~val;
 772                         *dummy  = val;
 773                         readback = *addr;
 774                         if (readback != ~val) {
 775                                 printf("FAILURE (data line): "
 776                                         "Is %08lx, should be %08lx\n",
 777                                                 readback, ~val);
 778                                 errs++;
 779                                 if (ctrlc())
 780                                         return -1;
 781                         }
 782                 }
 783         }
 784
 785         /*
 786          * Based on code whose Original Author and Copyright
 787          * information follows: Copyright (c) 1998 by Michael
 788          * Barr. This software is placed into the public
 789          * domain and may be used for any purpose. However,
 790          * this notice must not be changed or removed and no
 791          * warranty is either expressed or implied by its
 792          * publication or distribution.
 793          */
 794
 795         /*
 796         * Address line test
 797
 798          * Description: Test the address bus wiring in a
 799          *              memory region by performing a walking
 800          *              1's test on the relevant bits of the
 801          *              address and checking for aliasing.
 802          *              This test will find single-bit
 803          *              address failures such as stuck-high,
 804          *              stuck-low, and shorted pins. The base
 805          *              address and size of the region are
 806          *              selected by the caller.
 807
 808          * Notes:       For best results, the selected base
 809          *              address should have enough LSB 0's to
 810          *              guarantee single address bit changes.
 811          *              For example, to test a 64-Kbyte
 812          *              region, select a base address on a
 813          *              64-Kbyte boundary. Also, select the
 814          *              region size as a power-of-two if at
 815          *              all possible.
 816          *
 817          * Returns:     0 if the test succeeds, 1 if the test fails.
 818          */
 819         pattern = (vu_long)0xaaaaaaaaaaaaaaaa;
 820         anti_pattern = (vu_long)0x5555555555555555;
 821
 822         debug("%s:%d: length = 0x%.8lx\n", __func__, __LINE__, num_words);
 823         /*
 824          * Write the default pattern at each of the
 825          * power-of-two offsets.
 826          */
 827         for (offset = 1; offset < num_words; offset <<= 1)
 828                 addr[offset] = pattern;
 829
 830         /*
 831          * Check for address bits stuck high.
 832          */
 833         test_offset = 0;
 834         addr[test_offset] = anti_pattern;
 835
 836         for (offset = 1; offset < num_words; offset <<= 1) {
 837                 temp = addr[offset];
 838                 if (temp != pattern) {
 839                         printf("\nFAILURE: Address bit stuck high @ 0x%.8lx:"
 840                                 " expected 0x%.8lx, actual 0x%.8lx\n",
 841                                 start_addr + offset*sizeof(vu_long),
 842                                 pattern, temp);
 843                         errs++;
 844                         if (ctrlc())
 845                                 return -1;
 846                 }
 847         }
 848         addr[test_offset] = pattern;
 849         schedule();
 850
 851         /*
 852          * Check for addr bits stuck low or shorted.
 853          */
 854         for (test_offset = 1; test_offset < num_words; test_offset <<= 1) {
 855                 addr[test_offset] = anti_pattern;
 856
 857                 for (offset = 1; offset < num_words; offset <<= 1) {
 858                         temp = addr[offset];
 859                         if ((temp != pattern) && (offset != test_offset)) {
 860                                 printf("\nFAILURE: Address bit stuck low or"
 861                                         " shorted @ 0x%.8lx: expected 0x%.8lx,"
 862                                         " actual 0x%.8lx\n",
 863                                         start_addr + offset*sizeof(vu_long),
 864                                         pattern, temp);
 865                                 errs++;
 866                                 if (ctrlc())
 867                                         return -1;
 868                         }
 869                 }
 870                 addr[test_offset] = pattern;
 871         }
 872
 873         /*
 874          * Description: Test the integrity of a physical
 875          *              memory device by performing an
 876          *              increment/decrement test over the
 877          *              entire region. In the process every
 878          *              storage bit in the device is tested
 879          *              as a zero and a one. The base address
 880          *              and the size of the region are
 881          *              selected by the caller.
 882          *
 883          * Returns:     0 if the test succeeds, 1 if the test fails.
 884          */
 885         num_words++;
 886
 887         /*
 888          * Fill memory with a known pattern.
 889          */
 890         for (pattern = 1, offset = 0; offset < num_words; pattern++, offset++) {
 891                 schedule();
 892                 addr[offset] = pattern;
 893         }
 894
 895         /*
 896          * Check each location and invert it for the second pass.
 897          */
 898         for (pattern = 1, offset = 0; offset < num_words; pattern++, offset++) {
 899                 schedule();
 900                 temp = addr[offset];
 901                 if (temp != pattern) {
 902                         printf("\nFAILURE (read/write) @ 0x%.8lx:"
 903                                 " expected 0x%.8lx, actual 0x%.8lx)\n",
 904                                 start_addr + offset*sizeof(vu_long),
 905                                 pattern, temp);
 906                         errs++;
 907                         if (ctrlc())
 908                                 return -1;
 909                 }
 910
 911                 anti_pattern = ~pattern;
 912                 addr[offset] = anti_pattern;
 913         }
 914
 915         /*
 916          * Check each location for the inverted pattern and zero it.
 917          */
 918         for (pattern = 1, offset = 0; offset < num_words; pattern++, offset++) {
 919                 schedule();
 920                 anti_pattern = ~pattern;
 921                 temp = addr[offset];
 922                 if (temp != anti_pattern) {
 923                         printf("\nFAILURE (read/write): @ 0x%.8lx:"
 924                                 " expected 0x%.8lx, actual 0x%.8lx)\n",
 925                                 start_addr + offset*sizeof(vu_long),
 926                                 anti_pattern, temp);
 927                         errs++;
 928                         if (ctrlc())
 929                                 return -1;
 930                 }
 931                 addr[offset] = 0;
 932         }
 933
 934         return errs;
 935 }
 936
 937 static int compare_regions(volatile unsigned long *bufa,
 938                            volatile unsigned long *bufb, size_t count)
 939 {
 940         volatile unsigned long  *p1 = bufa;
 941         volatile unsigned long  *p2 = bufb;
 942         int errs = 0;
 943         size_t i;
 944
 945         for (i = 0; i < count; i++, p1++, p2++) {
 946                 if (*p1 != *p2) {
 947                         printf("FAILURE: 0x%08lx != 0x%08lx (delta=0x%08lx -> bit %ld) at offset 0x%08lx\n",
 948                                (unsigned long)*p1, (unsigned long)*p2,
 949                                *p1 ^ *p2, __ffs(*p1 ^ *p2),
 950                                 (unsigned long)(i * sizeof(unsigned long)));
 951                         errs++;
 952                 }
 953         }
 954
 955         return errs;
 956 }
 957
 958 static ulong test_bitflip_comparison(volatile unsigned long *bufa,
 959                                      volatile unsigned long *bufb, size_t count)
 960 {
 961         volatile unsigned long *p1 = bufa;
 962         volatile unsigned long *p2 = bufb;
 963         unsigned int j, k;
 964         unsigned long q;
 965         size_t i;
 966         int max;
 967         int errs = 0;
 968
 969         max = sizeof(unsigned long) * 8;
 970         for (k = 0; k < max; k++) {
 971                 q = 1UL << k;
 972                 for (j = 0; j < 8; j++) {
 973                         schedule();
 974                         q = ~q;
 975                         p1 = (volatile unsigned long *)bufa;
 976                         p2 = (volatile unsigned long *)bufb;
 977                         for (i = 0; i < count; i++)
 978                                 *p1++ = *p2++ = (i % 2) == 0 ? q : ~q;
 979
 980                         errs += compare_regions(bufa, bufb, count);
 981                 }
 982
 983                 if (ctrlc())
 984                         return -1UL;
 985         }
 986
 987         return errs;
 988 }
 989
 990 static ulong mem_test_bitflip(vu_long *buf, ulong start, ulong end)
 991 {
 992         /*
 993          * Split the specified range into two halves.
 994          * Note that mtest range is inclusive of start,end.
 995          * Bitflip test instead uses a count (of 32-bit words).
 996          */
 997         ulong half_size = (end - start + 1) / 2 / sizeof(unsigned long);
 998
 999         return test_bitflip_comparison(buf, buf + half_size, half_size);
1000 }
1001
1002 static ulong mem_test_quick(vu_long *buf, ulong start_addr, ulong end_addr,
1003                             vu_long pattern, int iteration)
1004 {
1005         vu_long *end;
1006         vu_long *addr;
1007         ulong errs = 0;
1008         ulong incr, length;
1009         ulong val, readback;
1010         const int plen = 2 * sizeof(ulong);
1011
1012         /* Alternate the pattern */
1013         incr = 1;
1014         if (iteration & 1) {
1015                 incr = -incr;
1016                 /*
1017                  * Flip the pattern each time to make lots of zeros and
1018                  * then, the next time, lots of ones.  We decrement
1019                  * the "negative" patterns and increment the "positive"
1020                  * patterns to preserve this feature.
1021                  */
1022                 if (pattern > (ulong)LONG_MAX)
1023                         pattern = -pattern;     /* complement & increment */
1024                 else
1025                         pattern = ~pattern;
1026         }
1027         length = (end_addr - start_addr) / sizeof(ulong);
1028         end = buf + length;
1029         printf("\rPattern %0*lX  Writing..."
1030                 "%12s"
1031                 "\b\b\b\b\b\b\b\b\b\b",
1032                 plen, pattern, "");
1033
1034         for (addr = buf, val = pattern; addr < end; addr++) {
1035                 schedule();
1036                 *addr = val;
1037                 val += incr;
1038         }
1039
1040         puts("Reading...");
1041
1042         for (addr = buf, val = pattern; addr < end; addr++) {
1043                 schedule();
1044                 readback = *addr;
1045                 if (readback != val) {
1046                         ulong offset = addr - buf;
1047
1048                         printf("\nMem error @ 0x%0*lX: found %0*lX, expected %0*lX\n",
1049                                plen, start_addr + offset * sizeof(vu_long),
1050                                plen, readback, plen, val);
1051                         errs++;
1052                         if (ctrlc())
1053                                 return -1;
1054                 }
1055                 val += incr;
1056         }
1057
1058         return errs;
1059 }
1060
1061 /*
1062  * Perform a memory test. A more complete alternative test can be
1063  * configured using CONFIG_SYS_ALT_MEMTEST. The complete test loops until
1064  * interrupted by ctrl-c or by a failure of one of the sub-tests.
1065  */
1066 static int do_mem_mtest(struct cmd_tbl *cmdtp, int flag, int argc,
1067                         char *const argv[])
1068 {
1069         ulong start, end;
1070         vu_long scratch_space;
1071         vu_long *buf, *dummy = &scratch_space;
1072         ulong iteration_limit = 0;
1073         ulong count = 0;
1074         ulong errs = 0; /* number of errors, or -1 if interrupted */
1075         ulong pattern = 0;
1076         int iteration;
1077
1078         start = CONFIG_SYS_MEMTEST_START;
1079         end = CONFIG_SYS_MEMTEST_END;
1080
1081         if (argc > 1)
1082                 if (strict_strtoul(argv[1], 16, &start) < 0)
1083                         return CMD_RET_USAGE;
1084
1085         if (argc > 2)
1086                 if (strict_strtoul(argv[2], 16, &end) < 0)
1087                         return CMD_RET_USAGE;
1088
1089         if (argc > 3)
1090                 if (strict_strtoul(argv[3], 16, &pattern) < 0)
1091                         return CMD_RET_USAGE;
1092
1093         if (argc > 4)
1094                 if (strict_strtoul(argv[4], 16, &iteration_limit) < 0)
1095                         return CMD_RET_USAGE;
1096
1097         if (end < start) {
1098                 printf("Refusing to do empty test\n");
1099                 return -1;
1100         }
1101
1102         printf("Testing %08lx ... %08lx:\n", start, end);
1103         debug("%s:%d: start %#08lx end %#08lx\n", __func__, __LINE__,
1104               start, end);
1105
1106         buf = map_sysmem(start, end - start);
1107         for (iteration = 0;
1108                         !iteration_limit || iteration < iteration_limit;
1109                         iteration++) {
1110                 if (ctrlc()) {
1111                         errs = -1UL;
1112                         break;
1113                 }
1114
1115                 printf("Iteration: %6d\r", iteration + 1);
1116                 debug("\n");
1117                 if (IS_ENABLED(CONFIG_SYS_ALT_MEMTEST)) {
1118                         errs = mem_test_alt(buf, start, end, dummy);
1119                         if (errs == -1UL)
1120                                 break;
1121                         if (IS_ENABLED(CONFIG_SYS_ALT_MEMTEST_BITFLIP)) {
1122                                 count += errs;
1123                                 errs = mem_test_bitflip(buf, start, end);
1124                         }
1125                 } else {
1126                         errs = mem_test_quick(buf, start, end, pattern,
1127                                               iteration);
1128                 }
1129                 if (errs == -1UL)
1130                         break;
1131                 count += errs;
1132         }
1133
1134         unmap_sysmem((void *)buf);
1135
1136         printf("\nTested %d iteration(s) with %lu errors.\n", iteration, count);
1137
1138         return errs != 0;
1139 }
1140 #endif  /* CONFIG_CMD_MEMTEST */
1141
1142 /* Modify memory.
1143  *
1144  * Syntax:
1145  *      mm{.b, .w, .l, .q} {addr}
1146  */
1147 static int
1148 mod_mem(struct cmd_tbl *cmdtp, int incrflag, int flag, int argc,
1149         char *const argv[])
1150 {
1151         ulong   addr;
1152         ulong i;  /* 64-bit if MEM_SUPPORT_64BIT_DATA */
1153         int     nbytes, size;
1154         void *ptr = NULL;
1155
1156         if (argc != 2)
1157                 return CMD_RET_USAGE;
1158
1159         bootretry_reset_cmd_timeout();  /* got a good command to get here */
1160         /* We use the last specified parameters, unless new ones are
1161          * entered.
1162          */
1163         addr = mm_last_addr;
1164         size = mm_last_size;
1165
1166         if ((flag & CMD_FLAG_REPEAT) == 0) {
1167                 /* New command specified.  Check for a size specification.
1168                  * Defaults to long if no or incorrect specification.
1169                  */
1170                 if ((size = cmd_get_data_size(argv[0], 4)) < 0)
1171                         return 1;
1172
1173                 /* Address is specified since argc > 1
1174                 */
1175                 addr = hextoul(argv[1], NULL);
1176                 addr += base_address;
1177         }
1178
1179         /* Print the address, followed by value.  Then accept input for
1180          * the next value.  A non-converted value exits.
1181          */
1182         do {
1183                 ptr = map_sysmem(addr, size);
1184                 printf("%08lx:", addr);
1185                 if (size == 4)
1186                         printf(" %08x", *((u32 *)ptr));
1187                 else if (MEM_SUPPORT_64BIT_DATA && size == 8)
1188                         printf(" %0lx", *((ulong *)ptr));
1189                 else if (size == 2)
1190                         printf(" %04x", *((u16 *)ptr));
1191                 else
1192                         printf(" %02x", *((u8 *)ptr));
1193
1194                 nbytes = cli_readline(" ? ");
1195                 if (nbytes == 0 || (nbytes == 1 && console_buffer[0] == '-')) {
1196                         /* <CR> pressed as only input, don't modify current
1197                          * location and move to next. "-" pressed will go back.
1198                          */
1199                         if (incrflag)
1200                                 addr += nbytes ? -size : size;
1201                         nbytes = 1;
1202                         /* good enough to not time out */
1203                         bootretry_reset_cmd_timeout();
1204                 }
1205 #ifdef CONFIG_BOOT_RETRY_TIME
1206                 else if (nbytes == -2) {
1207                         break;  /* timed out, exit the command  */
1208                 }
1209 #endif
1210                 else {
1211                         char *endp;
1212                         if (MEM_SUPPORT_64BIT_DATA)
1213                                 i = simple_strtoull(console_buffer, &endp, 16);
1214                         else
1215                                 i = hextoul(console_buffer, &endp);
1216                         nbytes = endp - console_buffer;
1217                         if (nbytes) {
1218                                 /* good enough to not time out
1219                                  */
1220                                 bootretry_reset_cmd_timeout();
1221                                 if (size == 4)
1222                                         *((u32 *)ptr) = i;
1223                                 else if (MEM_SUPPORT_64BIT_DATA && size == 8)
1224                                         *((ulong *)ptr) = i;
1225                                 else if (size == 2)
1226                                         *((u16 *)ptr) = i;
1227                                 else
1228                                         *((u8 *)ptr) = i;
1229                                 if (incrflag)
1230                                         addr += size;
1231                         }
1232                 }
1233         } while (nbytes);
1234         if (ptr)
1235                 unmap_sysmem(ptr);
1236
1237         mm_last_addr = addr;
1238         mm_last_size = size;
1239         return 0;
1240 }
1241
1242 #ifdef CONFIG_CMD_CRC32
1243
1244 static int do_mem_crc(struct cmd_tbl *cmdtp, int flag, int argc,
1245                       char *const argv[])
1246 {
1247         int flags = 0;
1248         int ac;
1249         char * const *av;
1250
1251         if (argc < 3)
1252                 return CMD_RET_USAGE;
1253
1254         av = argv + 1;
1255         ac = argc - 1;
1256 #ifdef CONFIG_CRC32_VERIFY
1257         if (strcmp(*av, "-v") == 0) {
1258                 flags |= HASH_FLAG_VERIFY | HASH_FLAG_ENV;
1259                 av++;
1260                 ac--;
1261         }
1262 #endif
1263
1264         return hash_command("crc32", flags, cmdtp, flag, ac, av);
1265 }
1266
1267 #endif
1268
1269 #ifdef CONFIG_CMD_RANDOM
1270 static int do_random(struct cmd_tbl *cmdtp, int flag, int argc,
1271                      char *const argv[])
1272 {
1273         unsigned long addr, len;
1274         unsigned long seed; // NOT INITIALIZED ON PURPOSE
1275         unsigned int *buf, *start;
1276         unsigned char *buf8;
1277         unsigned int i;
1278
1279         if (argc < 3 || argc > 4)
1280                 return CMD_RET_USAGE;
1281
1282         len = hextoul(argv[2], NULL);
1283         addr = hextoul(argv[1], NULL);
1284
1285         if (argc == 4) {
1286                 seed = hextoul(argv[3], NULL);
1287                 if (seed == 0) {
1288                         printf("The seed cannot be 0. Using 0xDEADBEEF.\n");
1289                         seed = 0xDEADBEEF;
1290                 }
1291         } else {
1292                 seed = get_timer(0) ^ rand();
1293         }
1294
1295         srand(seed);
1296         start = map_sysmem(addr, len);
1297         buf = start;
1298         for (i = 0; i < (len / 4); i++)
1299                 *buf++ = rand();
1300
1301         buf8 = (unsigned char *)buf;
1302         for (i = 0; i < (len % 4); i++)
1303                 *buf8++ = rand() & 0xFF;
1304
1305         unmap_sysmem(start);
1306         printf("%lu bytes filled with random data\n", len);
1307
1308         return CMD_RET_SUCCESS;
1309 }
1310 #endif
1311
1312 /**************************************************/
1313 U_BOOT_CMD(
1314         md,     3,      1,      do_mem_md,
1315         "memory display",
1316         "[.b, .w, .l" HELP_Q "] address [# of objects]"
1317 );
1318
1319 U_BOOT_CMD(
1320         mm,     2,      1,      do_mem_mm,
1321         "memory modify (auto-incrementing address)",
1322         "[.b, .w, .l" HELP_Q "] address"
1323 );
1324
1325 U_BOOT_CMD(
1326         nm,     2,      1,      do_mem_nm,
1327         "memory modify (constant address)",
1328         "[.b, .w, .l" HELP_Q "] address"
1329 );
1330
1331 U_BOOT_CMD(
1332         mw,     4,      1,      do_mem_mw,
1333         "memory write (fill)",
1334         "[.b, .w, .l" HELP_Q "] address value [count]"
1335 );
1336
1337 U_BOOT_CMD(
1338         cp,     4,      1,      do_mem_cp,
1339         "memory copy",
1340         "[.b, .w, .l" HELP_Q "] source target count"
1341 );
1342
1343 U_BOOT_CMD(
1344         cmp,    4,      1,      do_mem_cmp,
1345         "memory compare",
1346         "[.b, .w, .l" HELP_Q "] addr1 addr2 count"
1347 );
1348
1349 #ifdef CONFIG_CMD_MEM_SEARCH
1350 /**************************************************/
1351 U_BOOT_CMD(
1352         ms,     255,    1,      do_mem_search,
1353         "memory search",
1354         "[.b, .w, .l" HELP_Q ", .s] [-q | -<n>] address #-of-objects <value>..."
1355         "  -q = quiet, -l<val> = match limit"
1356 );
1357 #endif
1358
1359 #ifdef CONFIG_CMD_CRC32
1360
1361 #ifndef CONFIG_CRC32_VERIFY
1362
1363 U_BOOT_CMD(
1364         crc32,  4,      1,      do_mem_crc,
1365         "checksum calculation",
1366         "address count [addr]\n    - compute CRC32 checksum [save at addr]"
1367 );
1368
1369 #else   /* CONFIG_CRC32_VERIFY */
1370
1371 U_BOOT_CMD(
1372         crc32,  5,      1,      do_mem_crc,
1373         "checksum calculation",
1374         "address count [addr]\n    - compute CRC32 checksum [save at addr]\n"
1375         "-v address count crc\n    - verify crc of memory area"
1376 );
1377
1378 #endif  /* CONFIG_CRC32_VERIFY */
1379
1380 #endif
1381
1382 U_BOOT_CMD(
1383         base,   2,      1,      do_mem_base,
1384         "print or set address offset",
1385         "\n    - print address offset for memory commands\n"
1386         "base off\n    - set address offset for memory commands to 'off'"
1387 );
1388
1389 U_BOOT_CMD(
1390         loop,   3,      1,      do_mem_loop,
1391         "infinite loop on address range",
1392         "[.b, .w, .l" HELP_Q "] address number_of_objects"
1393 );
1394
1395 #ifdef CONFIG_LOOPW
1396 U_BOOT_CMD(
1397         loopw,  4,      1,      do_mem_loopw,
1398         "infinite write loop on address range",
1399         "[.b, .w, .l" HELP_Q "] address number_of_objects data_to_write"
1400 );
1401 #endif /* CONFIG_LOOPW */
1402
1403 #ifdef CONFIG_CMD_MEMTEST
1404 U_BOOT_CMD(
1405         mtest,  5,      1,      do_mem_mtest,
1406         "simple RAM read/write test",
1407         "[start [end [pattern [iterations]]]]"
1408 );
1409 #endif  /* CONFIG_CMD_MEMTEST */
1410
1411 #ifdef CONFIG_CMD_MX_CYCLIC
1412 U_BOOT_CMD(
1413         mdc,    4,      1,      do_mem_mdc,
1414         "memory display cyclic",
1415         "[.b, .w, .l" HELP_Q "] address count delay(ms)"
1416 );
1417
1418 U_BOOT_CMD(
1419         mwc,    4,      1,      do_mem_mwc,
1420         "memory write cyclic",
1421         "[.b, .w, .l" HELP_Q "] address value delay(ms)"
1422 );
1423 #endif /* CONFIG_CMD_MX_CYCLIC */
1424
1425 #ifdef CONFIG_CMD_RANDOM
1426 U_BOOT_CMD(
1427         random, 4,      0,      do_random,
1428         "fill memory with random pattern",
1429         "<addr> <len> [<seed>]\n"
1430         "   - Fill 'len' bytes of memory starting at 'addr' with random data\n"
1431 );
1432 #endif