hw/pflash_cfi01.c

   1 /*
   2  *  CFI parallel flash with Intel command set emulation
   3  *
   4  *  Copyright (c) 2006 Thorsten Zitterell
   5  *  Copyright (c) 2005 Jocelyn Mayer
   6  *
   7  * This library is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2 of the License, or (at your option) any later version.
  11  *
  12  * This library 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 GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public
  18  * License along with this library; if not, see <http://www.gnu.org/licenses/>.
  19  */
  20
  21 /*
  22  * For now, this code can emulate flashes of 1, 2 or 4 bytes width.
  23  * Supported commands/modes are:
  24  * - flash read
  25  * - flash write
  26  * - flash ID read
  27  * - sector erase
  28  * - CFI queries
  29  *
  30  * It does not support timings
  31  * It does not support flash interleaving
  32  * It does not implement software data protection as found in many real chips
  33  * It does not implement erase suspend/resume commands
  34  * It does not implement multiple sectors erase
  35  *
  36  * It does not implement much more ...
  37  */
  38
  39 #include "hw.h"
  40 #include "flash.h"
  41 #include "block.h"
  42 #include "qemu-timer.h"
  43 #include "exec-memory.h"
  44
  45 #define PFLASH_BUG(fmt, ...) \
  46 do { \
  47     printf("PFLASH: Possible BUG - " fmt, ## __VA_ARGS__); \
  48     exit(1); \
  49 } while(0)
  50
  51 /* #define PFLASH_DEBUG */
  52 #ifdef PFLASH_DEBUG
  53 #define DPRINTF(fmt, ...)                          \
  54 do {                                               \
  55     printf("PFLASH: " fmt , ## __VA_ARGS__);       \
  56 } while (0)
  57 #else
  58 #define DPRINTF(fmt, ...) do { } while (0)
  59 #endif
  60
  61 struct pflash_t {
  62     BlockDriverState *bs;
  63     target_phys_addr_t base;
  64     target_phys_addr_t sector_len;
  65     target_phys_addr_t total_len;
  66     int width;
  67     int wcycle; /* if 0, the flash is read normally */
  68     int bypass;
  69     int ro;
  70     uint8_t cmd;
  71     uint8_t status;
  72     uint16_t ident[4];
  73     uint8_t cfi_len;
  74     uint8_t cfi_table[0x52];
  75     target_phys_addr_t counter;
  76     unsigned int writeblock_size;
  77     QEMUTimer *timer;
  78     MemoryRegion mem;
  79     void *storage;
  80 };
  81
  82 static void pflash_timer (void *opaque)
  83 {
  84     pflash_t *pfl = opaque;
  85
  86     DPRINTF("%s: command %02x done\n", __func__, pfl->cmd);
  87     /* Reset flash */
  88     pfl->status ^= 0x80;
  89     if (pfl->bypass) {
  90         pfl->wcycle = 2;
  91     } else {
  92         memory_region_rom_device_set_readable(&pfl->mem, true);
  93         pfl->wcycle = 0;
  94     }
  95     pfl->cmd = 0;
  96 }
  97
  98 static uint32_t pflash_read (pflash_t *pfl, target_phys_addr_t offset,
  99                              int width, int be)
 100 {
 101     target_phys_addr_t boff;
 102     uint32_t ret;
 103     uint8_t *p;
 104
 105     ret = -1;
 106     boff = offset & 0xFF; /* why this here ?? */
 107
 108     if (pfl->width == 2)
 109         boff = boff >> 1;
 110     else if (pfl->width == 4)
 111         boff = boff >> 2;
 112
 113 #if 0
 114     DPRINTF("%s: reading offset " TARGET_FMT_plx " under cmd %02x width %d\n",
 115             __func__, offset, pfl->cmd, width);
 116 #endif
 117     switch (pfl->cmd) {
 118     case 0x00:
 119         /* Flash area read */
 120         p = pfl->storage;
 121         switch (width) {
 122         case 1:
 123             ret = p[offset];
 124             DPRINTF("%s: data offset " TARGET_FMT_plx " %02x\n",
 125                     __func__, offset, ret);
 126             break;
 127         case 2:
 128             if (be) {
 129                 ret = p[offset] << 8;
 130                 ret |= p[offset + 1];
 131             } else {
 132                 ret = p[offset];
 133                 ret |= p[offset + 1] << 8;
 134             }
 135             DPRINTF("%s: data offset " TARGET_FMT_plx " %04x\n",
 136                     __func__, offset, ret);
 137             break;
 138         case 4:
 139             if (be) {
 140                 ret = p[offset] << 24;
 141                 ret |= p[offset + 1] << 16;
 142                 ret |= p[offset + 2] << 8;
 143                 ret |= p[offset + 3];
 144             } else {
 145                 ret = p[offset];
 146                 ret |= p[offset + 1] << 8;
 147                 ret |= p[offset + 1] << 8;
 148                 ret |= p[offset + 2] << 16;
 149                 ret |= p[offset + 3] << 24;
 150             }
 151             DPRINTF("%s: data offset " TARGET_FMT_plx " %08x\n",
 152                     __func__, offset, ret);
 153             break;
 154         default:
 155             DPRINTF("BUG in %s\n", __func__);
 156         }
 157
 158         break;
 159     case 0x20: /* Block erase */
 160     case 0x50: /* Clear status register */
 161     case 0x60: /* Block /un)lock */
 162     case 0x70: /* Status Register */
 163     case 0xe8: /* Write block */
 164         /* Status register read */
 165         ret = pfl->status;
 166         DPRINTF("%s: status %x\n", __func__, ret);
 167         break;
 168     case 0x90:
 169         switch (boff) {
 170         case 0:
 171             ret = pfl->ident[0] << 8 | pfl->ident[1];
 172             DPRINTF("%s: Manufacturer Code %04x\n", __func__, ret);
 173             break;
 174         case 1:
 175             ret = pfl->ident[2] << 8 | pfl->ident[3];
 176             DPRINTF("%s: Device ID Code %04x\n", __func__, ret);
 177             break;
 178         default:
 179             DPRINTF("%s: Read Device Information boff=%x\n", __func__, boff);
 180             ret = 0;
 181             break;
 182         }
 183         break;
 184     case 0x98: /* Query mode */
 185         if (boff > pfl->cfi_len)
 186             ret = 0;
 187         else
 188             ret = pfl->cfi_table[boff];
 189         break;
 190     default:
 191         /* This should never happen : reset state & treat it as a read */
 192         DPRINTF("%s: unknown command state: %x\n", __func__, pfl->cmd);
 193         pfl->wcycle = 0;
 194         pfl->cmd = 0;
 195     }
 196     return ret;
 197 }
 198
 199 /* update flash content on disk */
 200 static void pflash_update(pflash_t *pfl, int offset,
 201                           int size)
 202 {
 203     int offset_end;
 204     if (pfl->bs) {
 205         offset_end = offset + size;
 206         /* round to sectors */
 207         offset = offset >> 9;
 208         offset_end = (offset_end + 511) >> 9;
 209         bdrv_write(pfl->bs, offset, pfl->storage + (offset << 9),
 210                    offset_end - offset);
 211     }
 212 }
 213
 214 static inline void pflash_data_write(pflash_t *pfl, target_phys_addr_t offset,
 215                                      uint32_t value, int width, int be)
 216 {
 217     uint8_t *p = pfl->storage;
 218
 219     DPRINTF("%s: block write offset " TARGET_FMT_plx
 220             " value %x counter " TARGET_FMT_plx "\n",
 221             __func__, offset, value, pfl->counter);
 222     switch (width) {
 223     case 1:
 224         p[offset] = value;
 225         break;
 226     case 2:
 227         if (be) {
 228             p[offset] = value >> 8;
 229             p[offset + 1] = value;
 230         } else {
 231             p[offset] = value;
 232             p[offset + 1] = value >> 8;
 233         }
 234         break;
 235     case 4:
 236         if (be) {
 237             p[offset] = value >> 24;
 238             p[offset + 1] = value >> 16;
 239             p[offset + 2] = value >> 8;
 240             p[offset + 3] = value;
 241         } else {
 242             p[offset] = value;
 243             p[offset + 1] = value >> 8;
 244             p[offset + 2] = value >> 16;
 245             p[offset + 3] = value >> 24;
 246         }
 247         break;
 248     }
 249
 250 }
 251
 252 static void pflash_write(pflash_t *pfl, target_phys_addr_t offset,
 253                          uint32_t value, int width, int be)
 254 {
 255     uint8_t *p;
 256     uint8_t cmd;
 257
 258     cmd = value;
 259
 260     DPRINTF("%s: writing offset " TARGET_FMT_plx " value %08x width %d wcycle 0x%x\n",
 261             __func__, offset, value, width, pfl->wcycle);
 262
 263     if (!pfl->wcycle) {
 264         /* Set the device in I/O access mode */
 265         memory_region_rom_device_set_readable(&pfl->mem, false);
 266     }
 267
 268     switch (pfl->wcycle) {
 269     case 0:
 270         /* read mode */
 271         switch (cmd) {
 272         case 0x00: /* ??? */
 273             goto reset_flash;
 274         case 0x10: /* Single Byte Program */
 275         case 0x40: /* Single Byte Program */
 276             DPRINTF("%s: Single Byte Program\n", __func__);
 277             break;
 278         case 0x20: /* Block erase */
 279             p = pfl->storage;
 280             offset &= ~(pfl->sector_len - 1);
 281
 282             DPRINTF("%s: block erase at " TARGET_FMT_plx " bytes "
 283                     TARGET_FMT_plx "\n",
 284                     __func__, offset, pfl->sector_len);
 285
 286             memset(p + offset, 0xff, pfl->sector_len);
 287             pflash_update(pfl, offset, pfl->sector_len);
 288             pfl->status |= 0x80; /* Ready! */
 289             break;
 290         case 0x50: /* Clear status bits */
 291             DPRINTF("%s: Clear status bits\n", __func__);
 292             pfl->status = 0x0;
 293             goto reset_flash;
 294         case 0x60: /* Block (un)lock */
 295             DPRINTF("%s: Block unlock\n", __func__);
 296             break;
 297         case 0x70: /* Status Register */
 298             DPRINTF("%s: Read status register\n", __func__);
 299             pfl->cmd = cmd;
 300             return;
 301         case 0x90: /* Read Device ID */
 302             DPRINTF("%s: Read Device information\n", __func__);
 303             pfl->cmd = cmd;
 304             return;
 305         case 0x98: /* CFI query */
 306             DPRINTF("%s: CFI query\n", __func__);
 307             break;
 308         case 0xe8: /* Write to buffer */
 309             DPRINTF("%s: Write to buffer\n", __func__);
 310             pfl->status |= 0x80; /* Ready! */
 311             break;
 312         case 0xff: /* Read array mode */
 313             DPRINTF("%s: Read array mode\n", __func__);
 314             goto reset_flash;
 315         default:
 316             goto error_flash;
 317         }
 318         pfl->wcycle++;
 319         pfl->cmd = cmd;
 320         return;
 321     case 1:
 322         switch (pfl->cmd) {
 323         case 0x10: /* Single Byte Program */
 324         case 0x40: /* Single Byte Program */
 325             DPRINTF("%s: Single Byte Program\n", __func__);
 326             pflash_data_write(pfl, offset, value, width, be);
 327             pflash_update(pfl, offset, width);
 328             pfl->status |= 0x80; /* Ready! */
 329             pfl->wcycle = 0;
 330         break;
 331         case 0x20: /* Block erase */
 332         case 0x28:
 333             if (cmd == 0xd0) { /* confirm */
 334                 pfl->wcycle = 0;
 335                 pfl->status |= 0x80;
 336             } else if (cmd == 0xff) { /* read array mode */
 337                 goto reset_flash;
 338             } else
 339                 goto error_flash;
 340
 341             break;
 342         case 0xe8:
 343             DPRINTF("%s: block write of %x bytes\n", __func__, value);
 344             pfl->counter = value;
 345             pfl->wcycle++;
 346             break;
 347         case 0x60:
 348             if (cmd == 0xd0) {
 349                 pfl->wcycle = 0;
 350                 pfl->status |= 0x80;
 351             } else if (cmd == 0x01) {
 352                 pfl->wcycle = 0;
 353                 pfl->status |= 0x80;
 354             } else if (cmd == 0xff) {
 355                 goto reset_flash;
 356             } else {
 357                 DPRINTF("%s: Unknown (un)locking command\n", __func__);
 358                 goto reset_flash;
 359             }
 360             break;
 361         case 0x98:
 362             if (cmd == 0xff) {
 363                 goto reset_flash;
 364             } else {
 365                 DPRINTF("%s: leaving query mode\n", __func__);
 366             }
 367             break;
 368         default:
 369             goto error_flash;
 370         }
 371         return;
 372     case 2:
 373         switch (pfl->cmd) {
 374         case 0xe8: /* Block write */
 375             pflash_data_write(pfl, offset, value, width, be);
 376
 377             pfl->status |= 0x80;
 378
 379             if (!pfl->counter) {
 380                 target_phys_addr_t mask = pfl->writeblock_size - 1;
 381                 mask = ~mask;
 382
 383                 DPRINTF("%s: block write finished\n", __func__);
 384                 pfl->wcycle++;
 385                 /* Flush the entire write buffer onto backing storage.  */
 386                 pflash_update(pfl, offset & mask, pfl->writeblock_size);
 387             }
 388
 389             pfl->counter--;
 390             break;
 391         default:
 392             goto error_flash;
 393         }
 394         return;
 395     case 3: /* Confirm mode */
 396         switch (pfl->cmd) {
 397         case 0xe8: /* Block write */
 398             if (cmd == 0xd0) {
 399                 pfl->wcycle = 0;
 400                 pfl->status |= 0x80;
 401             } else {
 402                 DPRINTF("%s: unknown command for \"write block\"\n", __func__);
 403                 PFLASH_BUG("Write block confirm");
 404                 goto reset_flash;
 405             }
 406             break;
 407         default:
 408             goto error_flash;
 409         }
 410         return;
 411     default:
 412         /* Should never happen */
 413         DPRINTF("%s: invalid write state\n",  __func__);
 414         goto reset_flash;
 415     }
 416     return;
 417
 418  error_flash:
 419     printf("%s: Unimplemented flash cmd sequence "
 420            "(offset " TARGET_FMT_plx ", wcycle 0x%x cmd 0x%x value 0x%x)\n",
 421            __func__, offset, pfl->wcycle, pfl->cmd, value);
 422
 423  reset_flash:
 424     memory_region_rom_device_set_readable(&pfl->mem, true);
 425
 426     pfl->bypass = 0;
 427     pfl->wcycle = 0;
 428     pfl->cmd = 0;
 429     return;
 430 }
 431
 432
 433 static uint32_t pflash_readb_be(void *opaque, target_phys_addr_t addr)
 434 {
 435     return pflash_read(opaque, addr, 1, 1);
 436 }
 437
 438 static uint32_t pflash_readb_le(void *opaque, target_phys_addr_t addr)
 439 {
 440     return pflash_read(opaque, addr, 1, 0);
 441 }
 442
 443 static uint32_t pflash_readw_be(void *opaque, target_phys_addr_t addr)
 444 {
 445     pflash_t *pfl = opaque;
 446
 447     return pflash_read(pfl, addr, 2, 1);
 448 }
 449
 450 static uint32_t pflash_readw_le(void *opaque, target_phys_addr_t addr)
 451 {
 452     pflash_t *pfl = opaque;
 453
 454     return pflash_read(pfl, addr, 2, 0);
 455 }
 456
 457 static uint32_t pflash_readl_be(void *opaque, target_phys_addr_t addr)
 458 {
 459     pflash_t *pfl = opaque;
 460
 461     return pflash_read(pfl, addr, 4, 1);
 462 }
 463
 464 static uint32_t pflash_readl_le(void *opaque, target_phys_addr_t addr)
 465 {
 466     pflash_t *pfl = opaque;
 467
 468     return pflash_read(pfl, addr, 4, 0);
 469 }
 470
 471 static void pflash_writeb_be(void *opaque, target_phys_addr_t addr,
 472                              uint32_t value)
 473 {
 474     pflash_write(opaque, addr, value, 1, 1);
 475 }
 476
 477 static void pflash_writeb_le(void *opaque, target_phys_addr_t addr,
 478                              uint32_t value)
 479 {
 480     pflash_write(opaque, addr, value, 1, 0);
 481 }
 482
 483 static void pflash_writew_be(void *opaque, target_phys_addr_t addr,
 484                              uint32_t value)
 485 {
 486     pflash_t *pfl = opaque;
 487
 488     pflash_write(pfl, addr, value, 2, 1);
 489 }
 490
 491 static void pflash_writew_le(void *opaque, target_phys_addr_t addr,
 492                              uint32_t value)
 493 {
 494     pflash_t *pfl = opaque;
 495
 496     pflash_write(pfl, addr, value, 2, 0);
 497 }
 498
 499 static void pflash_writel_be(void *opaque, target_phys_addr_t addr,
 500                              uint32_t value)
 501 {
 502     pflash_t *pfl = opaque;
 503
 504     pflash_write(pfl, addr, value, 4, 1);
 505 }
 506
 507 static void pflash_writel_le(void *opaque, target_phys_addr_t addr,
 508                              uint32_t value)
 509 {
 510     pflash_t *pfl = opaque;
 511
 512     pflash_write(pfl, addr, value, 4, 0);
 513 }
 514
 515 static const MemoryRegionOps pflash_cfi01_ops_be = {
 516     .old_mmio = {
 517         .read = { pflash_readb_be, pflash_readw_be, pflash_readl_be, },
 518         .write = { pflash_writeb_be, pflash_writew_be, pflash_writel_be, },
 519     },
 520     .endianness = DEVICE_NATIVE_ENDIAN,
 521 };
 522
 523 static const MemoryRegionOps pflash_cfi01_ops_le = {
 524     .old_mmio = {
 525         .read = { pflash_readb_le, pflash_readw_le, pflash_readl_le, },
 526         .write = { pflash_writeb_le, pflash_writew_le, pflash_writel_le, },
 527     },
 528     .endianness = DEVICE_NATIVE_ENDIAN,
 529 };
 530
 531 /* Count trailing zeroes of a 32 bits quantity */
 532 static int ctz32 (uint32_t n)
 533 {
 534     int ret;
 535
 536     ret = 0;
 537     if (!(n & 0xFFFF)) {
 538         ret += 16;
 539         n = n >> 16;
 540     }
 541     if (!(n & 0xFF)) {
 542         ret += 8;
 543         n = n >> 8;
 544     }
 545     if (!(n & 0xF)) {
 546         ret += 4;
 547         n = n >> 4;
 548     }
 549     if (!(n & 0x3)) {
 550         ret += 2;
 551         n = n >> 2;
 552     }
 553     if (!(n & 0x1)) {
 554         ret++;
 555 #if 0 /* This is not necessary as n is never 0 */
 556         n = n >> 1;
 557 #endif
 558     }
 559 #if 0 /* This is not necessary as n is never 0 */
 560     if (!n)
 561         ret++;
 562 #endif
 563
 564     return ret;
 565 }
 566
 567 pflash_t *pflash_cfi01_register(target_phys_addr_t base,
 568                                 DeviceState *qdev, const char *name,
 569                                 target_phys_addr_t size,
 570                                 BlockDriverState *bs, uint32_t sector_len,
 571                                 int nb_blocs, int width,
 572                                 uint16_t id0, uint16_t id1,
 573                                 uint16_t id2, uint16_t id3, int be)
 574 {
 575     pflash_t *pfl;
 576     target_phys_addr_t total_len;
 577     int ret;
 578
 579     total_len = sector_len * nb_blocs;
 580
 581     /* XXX: to be fixed */
 582 #if 0
 583     if (total_len != (8 * 1024 * 1024) && total_len != (16 * 1024 * 1024) &&
 584         total_len != (32 * 1024 * 1024) && total_len != (64 * 1024 * 1024))
 585         return NULL;
 586 #endif
 587
 588     pfl = g_malloc0(sizeof(pflash_t));
 589
 590     memory_region_init_rom_device(
 591         &pfl->mem, be ? &pflash_cfi01_ops_be : &pflash_cfi01_ops_le, pfl,
 592         qdev, name, size);
 593     pfl->storage = memory_region_get_ram_ptr(&pfl->mem);
 594     memory_region_add_subregion(get_system_memory(), base, &pfl->mem);
 595
 596     pfl->bs = bs;
 597     if (pfl->bs) {
 598         /* read the initial flash content */
 599         ret = bdrv_read(pfl->bs, 0, pfl->storage, total_len >> 9);
 600         if (ret < 0) {
 601             memory_region_del_subregion(get_system_memory(), &pfl->mem);
 602             memory_region_destroy(&pfl->mem);
 603             g_free(pfl);
 604             return NULL;
 605         }
 606         bdrv_attach_dev_nofail(pfl->bs, pfl);
 607     }
 608 #if 0 /* XXX: there should be a bit to set up read-only,
 609        *      the same way the hardware does (with WP pin).
 610        */
 611     pfl->ro = 1;
 612 #else
 613     pfl->ro = 0;
 614 #endif
 615     pfl->timer = qemu_new_timer_ns(vm_clock, pflash_timer, pfl);
 616     pfl->base = base;
 617     pfl->sector_len = sector_len;
 618     pfl->total_len = total_len;
 619     pfl->width = width;
 620     pfl->wcycle = 0;
 621     pfl->cmd = 0;
 622     pfl->status = 0;
 623     pfl->ident[0] = id0;
 624     pfl->ident[1] = id1;
 625     pfl->ident[2] = id2;
 626     pfl->ident[3] = id3;
 627     /* Hardcoded CFI table */
 628     pfl->cfi_len = 0x52;
 629     /* Standard "QRY" string */
 630     pfl->cfi_table[0x10] = 'Q';
 631     pfl->cfi_table[0x11] = 'R';
 632     pfl->cfi_table[0x12] = 'Y';
 633     /* Command set (Intel) */
 634     pfl->cfi_table[0x13] = 0x01;
 635     pfl->cfi_table[0x14] = 0x00;
 636     /* Primary extended table address (none) */
 637     pfl->cfi_table[0x15] = 0x31;
 638     pfl->cfi_table[0x16] = 0x00;
 639     /* Alternate command set (none) */
 640     pfl->cfi_table[0x17] = 0x00;
 641     pfl->cfi_table[0x18] = 0x00;
 642     /* Alternate extended table (none) */
 643     pfl->cfi_table[0x19] = 0x00;
 644     pfl->cfi_table[0x1A] = 0x00;
 645     /* Vcc min */
 646     pfl->cfi_table[0x1B] = 0x45;
 647     /* Vcc max */
 648     pfl->cfi_table[0x1C] = 0x55;
 649     /* Vpp min (no Vpp pin) */
 650     pfl->cfi_table[0x1D] = 0x00;
 651     /* Vpp max (no Vpp pin) */
 652     pfl->cfi_table[0x1E] = 0x00;
 653     /* Reserved */
 654     pfl->cfi_table[0x1F] = 0x07;
 655     /* Timeout for min size buffer write */
 656     pfl->cfi_table[0x20] = 0x07;
 657     /* Typical timeout for block erase */
 658     pfl->cfi_table[0x21] = 0x0a;
 659     /* Typical timeout for full chip erase (4096 ms) */
 660     pfl->cfi_table[0x22] = 0x00;
 661     /* Reserved */
 662     pfl->cfi_table[0x23] = 0x04;
 663     /* Max timeout for buffer write */
 664     pfl->cfi_table[0x24] = 0x04;
 665     /* Max timeout for block erase */
 666     pfl->cfi_table[0x25] = 0x04;
 667     /* Max timeout for chip erase */
 668     pfl->cfi_table[0x26] = 0x00;
 669     /* Device size */
 670     pfl->cfi_table[0x27] = ctz32(total_len); // + 1;
 671     /* Flash device interface (8 & 16 bits) */
 672     pfl->cfi_table[0x28] = 0x02;
 673     pfl->cfi_table[0x29] = 0x00;
 674     /* Max number of bytes in multi-bytes write */
 675     if (width == 1) {
 676         pfl->cfi_table[0x2A] = 0x08;
 677     } else {
 678         pfl->cfi_table[0x2A] = 0x0B;
 679     }
 680     pfl->writeblock_size = 1 << pfl->cfi_table[0x2A];
 681
 682     pfl->cfi_table[0x2B] = 0x00;
 683     /* Number of erase block regions (uniform) */
 684     pfl->cfi_table[0x2C] = 0x01;
 685     /* Erase block region 1 */
 686     pfl->cfi_table[0x2D] = nb_blocs - 1;
 687     pfl->cfi_table[0x2E] = (nb_blocs - 1) >> 8;
 688     pfl->cfi_table[0x2F] = sector_len >> 8;
 689     pfl->cfi_table[0x30] = sector_len >> 16;
 690
 691     /* Extended */
 692     pfl->cfi_table[0x31] = 'P';
 693     pfl->cfi_table[0x32] = 'R';
 694     pfl->cfi_table[0x33] = 'I';
 695
 696     pfl->cfi_table[0x34] = '1';
 697     pfl->cfi_table[0x35] = '1';
 698
 699     pfl->cfi_table[0x36] = 0x00;
 700     pfl->cfi_table[0x37] = 0x00;
 701     pfl->cfi_table[0x38] = 0x00;
 702     pfl->cfi_table[0x39] = 0x00;
 703
 704     pfl->cfi_table[0x3a] = 0x00;
 705
 706     pfl->cfi_table[0x3b] = 0x00;
 707     pfl->cfi_table[0x3c] = 0x00;
 708
 709     return pfl;
 710 }
 711
 712 MemoryRegion *pflash_cfi01_get_memory(pflash_t *fl)
 713 {
 714     return &fl->mem;
 715 }