board/svm_sc8xx/flash.c

   1 /*
   2  * Wolfgang Denk, DENX Software Engineering, [email protected].
   3  *
   4  * See file CREDITS for list of people who contributed to this
   5  * project.
   6  *
   7  * This program is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU General Public License as
   9  * published by the Free Software Foundation; either version 2 of
  10  * the License, or (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, write to the Free Software
  19  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  20  * MA 02111-1307 USA
  21  */
  22
  23 #include <common.h>
  24 #include <mpc8xx.h>
  25
  26 #ifndef CONFIG_ENV_ADDR
  27 #define CONFIG_ENV_ADDR (CONFIG_SYS_FLASH_BASE + CONFIG_ENV_OFFSET)
  28 #endif
  29
  30 flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS];
  31
  32 /*-----------------------------------------------------------------------
  33  * Functions
  34  */
  35 static int write_word(flash_info_t *info, ulong dest, ulong data);
  36
  37 #ifdef CONFIG_BOOT_8B
  38 static int my_in_8(unsigned char *addr);
  39 static void my_out_8(unsigned char *addr, int val);
  40 #endif
  41 #ifdef CONFIG_BOOT_16B
  42 static int my_in_be16(unsigned short *addr);
  43 static void my_out_be16(unsigned short *addr, int val);
  44 #endif
  45 #ifdef CONFIG_BOOT_32B
  46 static unsigned my_in_be32(unsigned *addr);
  47 static void my_out_be32(unsigned *addr, int val);
  48 #endif
  49 /*-----------------------------------------------------------------------
  50  */
  51
  52 unsigned long flash_init(void)
  53 {
  54         volatile immap_t *immap = (immap_t *) CONFIG_SYS_IMMR;
  55         volatile memctl8xx_t *memctl = &immap->im_memctl;
  56         unsigned long size_b0, size_b1;
  57         int i;
  58
  59         size_b0 = 0;
  60         size_b1 = 0;
  61         /* Init: no FLASHes known */
  62         for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; ++i)
  63                 flash_info[i].flash_id = FLASH_UNKNOWN;
  64
  65 #ifdef CONFIG_SYS_DOC_BASE
  66 #ifndef CONFIG_FEL8xx_AT
  67         /* 32k bytes */
  68         memctl->memc_or5 = (0xffff8000 | CONFIG_SYS_OR_TIMING_DOC);
  69         memctl->memc_br5 = CONFIG_SYS_DOC_BASE | 0x401;
  70 #else
  71         /* 32k bytes */
  72         memctl->memc_or3 = (0xffff8000 | CONFIG_SYS_OR_TIMING_DOC);
  73         memctl->memc_br3 = CONFIG_SYS_DOC_BASE | 0x401;
  74 #endif
  75 #endif
  76 #if defined(CONFIG_BOOT_8B)
  77         size_b0 = 0x80000;      /* 512 K */
  78
  79         flash_info[0].flash_id = FLASH_MAN_AMD | FLASH_AM040;
  80         flash_info[0].sector_count = 8;
  81         flash_info[0].size = 0x00080000;
  82
  83         /* set up sector start address table */
  84         for (i = 0; i < flash_info[0].sector_count; i++)
  85                 flash_info[0].start[i] = 0x40000000 + (i * 0x10000);
  86
  87         /* protect all sectors */
  88         for (i = 0; i < flash_info[0].sector_count; i++)
  89                 flash_info[0].protect[i] = 0x1;
  90
  91 #elif defined(CONFIG_BOOT_16B)
  92         size_b0 = 0x400000;     /* 4MB , assume AMD29LV320B */
  93
  94         flash_info[0].flash_id = FLASH_MAN_AMD | FLASH_AM320B;
  95         flash_info[0].sector_count = 67;
  96         flash_info[0].size = 0x00400000;
  97
  98         /* set up sector start address table */
  99         flash_info[0].start[0] = 0x40000000;
 100         flash_info[0].start[1] = 0x40000000 + 0x4000;
 101         flash_info[0].start[2] = 0x40000000 + 0x6000;
 102         flash_info[0].start[3] = 0x40000000 + 0x8000;
 103
 104         for (i = 4; i < flash_info[0].sector_count; i++) {
 105                 flash_info[0].start[i] =
 106                         0x40000000 + 0x10000 + ((i - 4) * 0x10000);
 107         }
 108
 109         /* protect all sectors */
 110         for (i = 0; i < flash_info[0].sector_count; i++)
 111                 flash_info[0].protect[i] = 0x1;
 112 #endif
 113
 114 #ifdef CONFIG_BOOT_32B
 115
 116         /* Static FLASH Bank configuration here - FIXME XXX */
 117         size_b0 = flash_get_size((vu_long *) FLASH_BASE0_PRELIM,
 118                                &flash_info[0]);
 119
 120         if (flash_info[0].flash_id == FLASH_UNKNOWN) {
 121                 printf("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
 122                         size_b0, size_b0 << 20);
 123         }
 124
 125         size_b1 = flash_get_size((vu_long *) FLASH_BASE1_PRELIM,
 126                                &flash_info[1]);
 127
 128         if (size_b1 > size_b0) {
 129                 printf("## ERROR: "
 130                         "Bank 1 (0x%08lx = %ld MB) > Bank 0 (0x%08lx = %ld MB)\n",
 131                         size_b1, size_b1 << 20, size_b0, size_b0 << 20);
 132                 flash_info[0].flash_id = FLASH_UNKNOWN;
 133                 flash_info[1].flash_id = FLASH_UNKNOWN;
 134                 flash_info[0].sector_count = -1;
 135                 flash_info[1].sector_count = -1;
 136                 flash_info[0].size = 0;
 137                 flash_info[1].size = 0;
 138
 139                 return 0;
 140         }
 141
 142         /* Remap FLASH according to real size */
 143         memctl->memc_or0 = CONFIG_SYS_OR_TIMING_FLASH |
 144                                 (-size_b0 & OR_AM_MSK);
 145         memctl->memc_br0 = (CONFIG_SYS_FLASH_BASE & BR_BA_MSK) |
 146                                 BR_MS_GPCM | BR_V;
 147
 148         /* Re-do sizing to get full correct info */
 149         size_b0 = flash_get_size((vu_long *) CONFIG_SYS_FLASH_BASE,
 150                                 &flash_info[0]);
 151
 152         flash_get_offsets(CONFIG_SYS_FLASH_BASE, &flash_info[0]);
 153
 154 #if CONFIG_SYS_MONITOR_BASE >= CONFIG_SYS_FLASH_BASE
 155         /* monitor protection ON by default */
 156         flash_protect(FLAG_PROTECT_SET,
 157                 CONFIG_SYS_MONITOR_BASE,
 158                 CONFIG_SYS_MONITOR_BASE + monitor_flash_len - 1,
 159                 &flash_info[0]);
 160 #endif
 161
 162 #ifdef  CONFIG_ENV_IS_IN_FLASH
 163         /* ENV protection ON by default */
 164         flash_protect(FLAG_PROTECT_SET,
 165                 CONFIG_ENV_ADDR,
 166                 CONFIG_ENV_ADDR + CONFIG_ENV_SIZE - 1, &flash_info[0]);
 167 #endif
 168
 169         if (size_b1) {
 170                 memctl->memc_or1 = CONFIG_SYS_OR_TIMING_FLASH |
 171                         (-size_b1 & 0xFFFF8000);
 172                 memctl->memc_br1 = ((CONFIG_SYS_FLASH_BASE +
 173                         size_b0) & BR_BA_MSK) | BR_MS_GPCM | BR_V;
 174
 175                 /* Re-do sizing to get full correct info */
 176                 size_b1 = flash_get_size((vu_long *)(CONFIG_SYS_FLASH_BASE +
 177                                         size_b0), &flash_info[1]);
 178
 179                 flash_get_offsets(CONFIG_SYS_FLASH_BASE + size_b0,
 180                                   &flash_info[1]);
 181
 182 #if CONFIG_SYS_MONITOR_BASE >= CONFIG_SYS_FLASH_BASE
 183                 /* monitor protection ON by default */
 184                 flash_protect(FLAG_PROTECT_SET,
 185                               CONFIG_SYS_MONITOR_BASE,
 186                               CONFIG_SYS_MONITOR_BASE + monitor_flash_len - 1,
 187                               &flash_info[1]);
 188 #endif
 189
 190 #ifdef  CONFIG_ENV_IS_IN_FLASH
 191                 /* ENV protection ON by default */
 192                 flash_protect(FLAG_PROTECT_SET,
 193                               CONFIG_ENV_ADDR,
 194                               CONFIG_ENV_ADDR + CONFIG_ENV_SIZE - 1,
 195                               &flash_info[1]);
 196 #endif
 197         } else {
 198                 memctl->memc_br1 = 0;   /* invalidate bank */
 199
 200                 flash_info[1].flash_id = FLASH_UNKNOWN;
 201                 flash_info[1].sector_count = -1;
 202         }
 203
 204         flash_info[0].size = size_b0;
 205         flash_info[1].size = size_b1;
 206
 207
 208 #endif /* CONFIG_BOOT_32B */
 209
 210         return size_b0 + size_b1;
 211 }
 212
 213
 214 void flash_print_info(flash_info_t *info)
 215 {
 216         int i;
 217
 218         if (info->flash_id == FLASH_UNKNOWN) {
 219                 printf("missing or unknown FLASH type\n");
 220                 return;
 221         }
 222
 223         switch (info->flash_id & FLASH_VENDMASK) {
 224         case FLASH_MAN_AMD:
 225                 printf("AMD ");
 226                 break;
 227         case FLASH_MAN_FUJ:
 228                 printf("FUJITSU ");
 229                 break;
 230         default:
 231                 printf("Unknown Vendor ");
 232                 break;
 233         }
 234
 235         switch (info->flash_id & FLASH_TYPEMASK) {
 236         case FLASH_AM400B:
 237                 printf("AM29LV400B (4 Mbit, bottom boot sect)\n");
 238                 break;
 239         case FLASH_AM400T:
 240                 printf("AM29LV400T (4 Mbit, top boot sector)\n");
 241                 break;
 242         case FLASH_AM800B:
 243                 printf("AM29LV800B (8 Mbit, bottom boot sect)\n");
 244                 break;
 245         case FLASH_AM800T:
 246                 printf("AM29LV800T (8 Mbit, top boot sector)\n");
 247                 break;
 248         case FLASH_AM160B:
 249                 printf("AM29LV160B (16 Mbit, bottom boot sect)\n");
 250                 break;
 251         case FLASH_AM160T:
 252                 printf("AM29LV160T (16 Mbit, top boot sector)\n");
 253                 break;
 254         case FLASH_AM320B:
 255                 printf("AM29LV320B (32 Mbit, bottom boot sect)\n");
 256                 break;
 257         case FLASH_AM320T:
 258                 printf("AM29LV320T (32 Mbit, top boot sector)\n");
 259                 break;
 260         default:
 261                 printf("Unknown Chip Type\n");
 262                 break;
 263         }
 264
 265         printf("  Size: %ld MB in %d Sectors\n",
 266                 info->size >> 20, info->sector_count);
 267
 268         printf("  Sector Start Addresses:");
 269         for (i = 0; i < info->sector_count; ++i) {
 270                 if ((i % 5) == 0)
 271                         printf("\n   ");
 272                 printf(" %08lX%s",
 273                        info->start[i], info->protect[i] ? " (RO)" : "     ");
 274         }
 275         printf("\n");
 276         return;
 277 }
 278
 279 /*
 280  * The following code cannot be run from FLASH!
 281  */
 282
 283 int flash_erase(flash_info_t *info, int s_first, int s_last)
 284 {
 285         vu_long *addr = (vu_long *) (info->start[0]);
 286         int flag, prot, sect, l_sect, in_mid, in_did;
 287         ulong start, now, last;
 288
 289         if ((s_first < 0) || (s_first > s_last)) {
 290                 if (info->flash_id == FLASH_UNKNOWN)
 291                         printf("- missing\n");
 292                 else
 293                         printf("- no sectors to erase\n");
 294
 295                 return 1;
 296         }
 297
 298         if ((info->flash_id == FLASH_UNKNOWN) ||
 299             (info->flash_id > FLASH_AMD_COMP)) {
 300                 printf("Can't erase unknown flash type %08lx - aborted\n",
 301                        info->flash_id);
 302                 return 1;
 303         }
 304
 305         prot = 0;
 306         for (sect = s_first; sect <= s_last; ++sect) {
 307                 if (info->protect[sect])
 308                         prot++;
 309         }
 310
 311         if (prot) {
 312                 printf("- Warning: %d protected sectors will not be erased!\n",
 313                         prot);
 314         } else {
 315                 printf("\n");
 316         }
 317
 318         l_sect = -1;
 319
 320         /* Disable interrupts which might cause a timeout here */
 321         flag = disable_interrupts();
 322
 323 #if defined(CONFIG_BOOT_8B)
 324         my_out_8((unsigned char *)((ulong)addr + 0x555), 0xaa);
 325         my_out_8((unsigned char *)((ulong)addr + 0x2aa), 0x55);
 326         my_out_8((unsigned char *)((ulong)addr + 0x555), 0x90);
 327
 328         in_mid = my_in_8((unsigned char *)addr);
 329         in_did = my_in_8((unsigned char *)((ulong)addr + 1));
 330
 331         printf(" man ID=0x%x, dev ID=0x%x.\n", in_mid, in_did);
 332
 333         my_out_8((unsigned char *)addr, 0xf0);
 334         udelay(1);
 335
 336         my_out_8((unsigned char *)((ulong)addr + 0x555), 0xaa);
 337         my_out_8((unsigned char *)((ulong)addr + 0x2aa), 0x55);
 338         my_out_8((unsigned char *)((ulong)addr + 0x555), 0x80);
 339         my_out_8((unsigned char *)((ulong)addr + 0x555), 0xaa);
 340         my_out_8((unsigned char *)((ulong)addr + 0x2aa), 0x55);
 341
 342         /* Start erase on unprotected sectors */
 343         for (sect = s_first; sect <= s_last; sect++) {
 344                 if (info->protect[sect] == 0) { /* not protected */
 345                         addr = (vu_long *) (info->start[sect]);
 346                         /*addr[0] = 0x00300030; */
 347                         my_out_8((unsigned char *)((ulong)addr), 0x30);
 348                         l_sect = sect;
 349                 }
 350         }
 351 #elif defined(CONFIG_BOOT_16B)
 352         my_out_be16((unsigned short *)((ulong)addr + (0xaaa)), 0xaa);
 353         my_out_be16((unsigned short *)((ulong)addr + (0x554)), 0x55);
 354         my_out_be16((unsigned short *)((ulong)addr + (0xaaa)), 0x90);
 355         in_mid = my_in_be16((unsigned short *)addr);
 356         in_did = my_in_be16((unsigned short *)((ulong)addr + 2));
 357         printf(" man ID=0x%x, dev ID=0x%x.\n", in_mid, in_did);
 358         my_out_be16((unsigned short *)addr, 0xf0);
 359         udelay(1);
 360         my_out_be16((unsigned short *)((ulong)addr + 0xaaa), 0xaa);
 361         my_out_be16((unsigned short *)((ulong)addr + 0x554), 0x55);
 362         my_out_be16((unsigned short *)((ulong)addr + 0xaaa), 0x80);
 363         my_out_be16((unsigned short *)((ulong)addr + 0xaaa), 0xaa);
 364         my_out_be16((unsigned short *)((ulong)addr + 0x554), 0x55);
 365         /* Start erase on unprotected sectors */
 366         for (sect = s_first; sect <= s_last; sect++) {
 367                 if (info->protect[sect] == 0) { /* not protected */
 368                         addr = (vu_long *) (info->start[sect]);
 369                         my_out_be16((unsigned short *)((ulong)addr), 0x30);
 370                         l_sect = sect;
 371                 }
 372         }
 373
 374 #elif defined(CONFIG_BOOT_32B)
 375         my_out_be32((unsigned *)((ulong)addr + 0x1554), 0xaa);
 376         my_out_be32((unsigned *)((ulong)addr + 0xaa8), 0x55);
 377         my_out_be32((unsigned *)((ulong)addr + 0x1554), 0x90);
 378
 379         in_mid = my_in_be32((unsigned *)addr);
 380         in_did = my_in_be32((unsigned *)((ulong)addr + 4));
 381
 382         printf(" man ID=0x%x, dev ID=0x%x.\n", in_mid, in_did);
 383
 384         my_out_be32((unsigned *) addr, 0xf0);
 385         udelay(1);
 386
 387         my_out_be32((unsigned *)((ulong)addr + 0x1554), 0xaa);
 388         my_out_be32((unsigned *)((ulong)addr + 0xaa8), 0x55);
 389         my_out_be32((unsigned *)((ulong)addr + 0x1554), 0x80);
 390         my_out_be32((unsigned *)((ulong)addr + 0x1554), 0xaa);
 391         my_out_be32((unsigned *)((ulong)addr + 0xaa8), 0x55);
 392
 393         /* Start erase on unprotected sectors */
 394         for (sect = s_first; sect <= s_last; sect++) {
 395                 if (info->protect[sect] == 0) { /* not protected */
 396                         addr = (vu_long *) (info->start[sect]);
 397                         my_out_be32((unsigned *)((ulong)addr), 0x00300030);
 398                         l_sect = sect;
 399                 }
 400         }
 401
 402 #else
 403 #error CONFIG_BOOT_(size)B missing.
 404 #endif
 405         /* re-enable interrupts if necessary */
 406         if (flag)
 407                 enable_interrupts();
 408
 409         /* wait at least 80us - let's wait 1 ms */
 410         udelay(1000);
 411
 412         /*
 413          * We wait for the last triggered sector
 414          */
 415         if (l_sect < 0)
 416                 goto DONE;
 417
 418         start = get_timer(0);
 419         last = start;
 420         addr = (vu_long *) (info->start[l_sect]);
 421 #if defined(CONFIG_BOOT_8B)
 422         while ((my_in_8((unsigned char *) addr) & 0x80) != 0x80)
 423 #elif defined(CONFIG_BOOT_16B)
 424         while ((my_in_be16((unsigned short *) addr) & 0x0080) != 0x0080)
 425 #elif defined(CONFIG_BOOT_32B)
 426         while ((my_in_be32((unsigned *) addr) & 0x00800080) != 0x00800080)
 427 #else
 428 #error CONFIG_BOOT_(size)B missing.
 429 #endif
 430         {
 431                 now = get_timer(start);
 432                 if (now > CONFIG_SYS_FLASH_ERASE_TOUT) {
 433                         printf("Timeout\n");
 434                         return 1;
 435                 }
 436                 /* show that we're waiting */
 437                 if ((now - last) > 1000) {      /* every second */
 438                         putc('.');
 439                         last = now;
 440                 }
 441         }
 442 DONE:
 443         /* reset to read mode */
 444         addr = (volatile unsigned long *) info->start[0];
 445
 446 #if defined(CONFIG_BOOT_8B)
 447         my_out_8((unsigned char *) addr, 0xf0);
 448 #elif defined(CONFIG_BOOT_16B)
 449         my_out_be16((unsigned short *) addr, 0x00f0);
 450 #elif defined(CONFIG_BOOT_32B)
 451         my_out_be32((unsigned *) addr, 0x00F000F0);     /* reset bank */
 452 #else
 453 #error CONFIG_BOOT_(size)B missing.
 454 #endif
 455         printf(" done\n");
 456         return 0;
 457 }
 458
 459 /*
 460  * Copy memory to flash, returns:
 461  * 0 - OK
 462  * 1 - write timeout
 463  * 2 - Flash not erased
 464  */
 465
 466 int write_buff(flash_info_t *info, uchar *src, ulong addr, ulong cnt)
 467 {
 468         ulong cp, wp, data;
 469         int i, l, rc;
 470
 471         wp = (addr & ~3);       /* get lower word aligned address */
 472
 473         /*
 474          * handle unaligned start bytes
 475          */
 476         l = addr - wp;
 477
 478         if (l != 0) {
 479                 data = 0;
 480                 for (i = 0, cp = wp; i < l; ++i, ++cp)
 481                         data = (data << 8) | (*(uchar *) cp);
 482
 483                 for (; i < 4 && cnt > 0; ++i) {
 484                         data = (data << 8) | *src++;
 485                         --cnt;
 486                         ++cp;
 487                 }
 488                 for (; cnt == 0 && i < 4; ++i, ++cp)
 489                         data = (data << 8) | (*(uchar *) cp);
 490
 491                 rc = write_word(info, wp, data);
 492
 493                 if (rc != 0)
 494                         return rc;
 495
 496                 wp += 4;
 497         }
 498
 499         /*
 500          * handle word aligned part
 501          */
 502         while (cnt >= 4) {
 503                 data = 0;
 504                 for (i = 0; i < 4; ++i)
 505                         data = (data << 8) | *src++;
 506
 507                 rc = write_word(info, wp, data);
 508
 509                 if (rc != 0)
 510                         return rc;
 511
 512                 wp += 4;
 513                 cnt -= 4;
 514         }
 515
 516         if (cnt == 0)
 517                 return 0;
 518
 519         /*
 520          * handle unaligned tail bytes
 521          */
 522         data = 0;
 523         for (i = 0, cp = wp; i < 4 && cnt > 0; ++i, ++cp) {
 524                 data = (data << 8) | *src++;
 525                 --cnt;
 526         }
 527         for (; i < 4; ++i, ++cp)
 528                 data = (data << 8) | (*(uchar *) cp);
 529
 530         return write_word(info, wp, data);
 531 }
 532
 533 /*
 534  * Write a word to Flash, returns:
 535  * 0 - OK
 536  * 1 - write timeout
 537  * 2 - Flash not erased
 538  */
 539 static int write_word(flash_info_t *info, ulong dest, ulong data)
 540 {
 541         ulong addr = (ulong) (info->start[0]);
 542         ulong start;
 543         int flag;
 544         ulong i;
 545         int data_short[2];
 546
 547         /* Check if Flash is (sufficiently) erased */
 548         if (((ulong)*(ulong *)dest & data) != data)
 549                 return 2;
 550
 551         /* Disable interrupts which might cause a timeout here */
 552         flag = disable_interrupts();
 553 #if defined(CONFIG_BOOT_8B)
 554 #ifdef DEBUG
 555         {
 556                 int in_mid, in_did;
 557
 558                 my_out_8((unsigned char *) (addr + 0x555), 0xaa);
 559                 my_out_8((unsigned char *) (addr + 0x2aa), 0x55);
 560                 my_out_8((unsigned char *) (addr + 0x555), 0x90);
 561
 562                 in_mid = my_in_8((unsigned char *) addr);
 563                 in_did = my_in_8((unsigned char *) (addr + 1));
 564
 565                 printf(" man ID=0x%x, dev ID=0x%x.\n", in_mid, in_did);
 566
 567                 my_out_8((unsigned char *) addr, 0xf0);
 568                 udelay(1);
 569         }
 570 #endif
 571         {
 572                 int data_ch[4];
 573
 574                 data_ch[0] = (int) ((data >> 24) & 0xff);
 575                 data_ch[1] = (int) ((data >> 16) & 0xff);
 576                 data_ch[2] = (int) ((data >> 8) & 0xff);
 577                 data_ch[3] = (int) (data & 0xff);
 578
 579                 for (i = 0; i < 4; i++) {
 580                         my_out_8((unsigned char *) (addr + 0x555), 0xaa);
 581                         my_out_8((unsigned char *) (addr + 0x2aa), 0x55);
 582                         my_out_8((unsigned char *) (addr + 0x555), 0xa0);
 583                         my_out_8((unsigned char *) (dest + i), data_ch[i]);
 584
 585                         /* re-enable interrupts if necessary */
 586                         if (flag)
 587                                 enable_interrupts();
 588
 589                         start = get_timer(0);
 590                         while ((my_in_8((unsigned char *)(dest + i))) !=
 591                                (data_ch[i])) {
 592                                 if (get_timer(start) >
 593                                     CONFIG_SYS_FLASH_WRITE_TOUT) {
 594                                         return 1;
 595                                 }
 596                         }
 597                 }               /* for */
 598         }
 599 #elif defined(CONFIG_BOOT_16B)
 600         data_short[0] = (int) (data >> 16) & 0xffff;
 601         data_short[1] = (int) data & 0xffff;
 602         for (i = 0; i < 2; i++) {
 603                 my_out_be16((unsigned short *)((ulong)addr + 0xaaa), 0xaa);
 604                 my_out_be16((unsigned short *)((ulong)addr + 0x554), 0x55);
 605                 my_out_be16((unsigned short *)((ulong)addr + 0xaaa), 0xa0);
 606                 my_out_be16((unsigned short *)(dest + (i * 2)),
 607                             data_short[i]);
 608
 609                 /* re-enable interrupts if necessary */
 610                 if (flag)
 611                         enable_interrupts();
 612
 613                 start = get_timer(0);
 614                 while ((my_in_be16((unsigned short *)(dest + (i * 2)))) !=
 615                                                         (data_short[i])) {
 616                         if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT)
 617                                 return 1;
 618                 }
 619         }
 620 #elif defined(CONFIG_BOOT_32B)
 621         addr[0x0555] = 0x00AA00AA;
 622         addr[0x02AA] = 0x00550055;
 623         addr[0x0555] = 0x00A000A0;
 624
 625         *((vu_long *)dest) = data;
 626
 627         /* re-enable interrupts if necessary */
 628         if (flag)
 629                 enable_interrupts();
 630
 631         /* data polling for D7 */
 632         start = get_timer(0);
 633         while ((*((vu_long *)dest) & 0x00800080) != (data & 0x00800080)) {
 634                 if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT)
 635                         return 1;
 636         }
 637 #endif
 638         return 0;
 639 }
 640
 641 #ifdef CONFIG_BOOT_8B
 642 static int my_in_8(unsigned char *addr)
 643 {
 644         int ret;
 645         __asm__ __volatile__("lbz%U1%X1 %0,%1; eieio":"=r"(ret):"m"(*addr));
 646
 647         return ret;
 648 }
 649
 650 static void my_out_8(unsigned char *addr, int val)
 651 {
 652         __asm__ __volatile__("stb%U0%X0 %1,%0; eieio":"=m"(*addr):"r"(val));
 653 }
 654 #endif
 655 #ifdef CONFIG_BOOT_16B
 656 static int my_in_be16(unsigned short *addr)
 657 {
 658         int ret;
 659         __asm__ __volatile__("lhz%U1%X1 %0,%1; eieio":"=r"(ret):"m"(*addr));
 660
 661         return ret;
 662 }
 663
 664 static void my_out_be16(unsigned short *addr, int val)
 665 {
 666         __asm__ __volatile__("sth%U0%X0 %1,%0; eieio":"=m"(*addr):"r"(val));
 667 }
 668 #endif
 669 #ifdef CONFIG_BOOT_32B
 670 static unsigned my_in_be32(unsigned *addr)
 671 {
 672         unsigned ret;
 673         __asm__ __volatile__("lwz%U1%X1 %0,%1; eieio":"=r"(ret):"m"(*addr));
 674
 675         return ret;
 676 }
 677
 678 static void my_out_be32(unsigned *addr, int val)
 679 {
 680         __asm__ __volatile__("stw%U0%X0 %1,%0; eieio":"=m"(*addr):"r"(val));
 681 }
 682 #endif