lib/fdtdec.c

   1 /*
   2  * Copyright (c) 2011 The Chromium OS Authors.
   3  * SPDX-License-Identifier:     GPL-2.0+
   4  */
   5
   6 #ifndef USE_HOSTCC
   7 #include <common.h>
   8 #include <boot_fit.h>
   9 #include <dm.h>
  10 #include <dm/of_extra.h>
  11 #include <errno.h>
  12 #include <fdtdec.h>
  13 #include <fdt_support.h>
  14 #include <libfdt.h>
  15 #include <serial.h>
  16 #include <asm/sections.h>
  17 #include <linux/ctype.h>
  18 #include <linux/lzo.h>
  19
  20 DECLARE_GLOBAL_DATA_PTR;
  21
  22 /*
  23  * Here are the type we know about. One day we might allow drivers to
  24  * register. For now we just put them here. The COMPAT macro allows us to
  25  * turn this into a sparse list later, and keeps the ID with the name.
  26  *
  27  * NOTE: This list is basically a TODO list for things that need to be
  28  * converted to driver model. So don't add new things here unless there is a
  29  * good reason why driver-model conversion is infeasible. Examples include
  30  * things which are used before driver model is available.
  31  */
  32 #define COMPAT(id, name) name
  33 static const char * const compat_names[COMPAT_COUNT] = {
  34         COMPAT(UNKNOWN, "<none>"),
  35         COMPAT(NVIDIA_TEGRA20_EMC, "nvidia,tegra20-emc"),
  36         COMPAT(NVIDIA_TEGRA20_EMC_TABLE, "nvidia,tegra20-emc-table"),
  37         COMPAT(NVIDIA_TEGRA20_NAND, "nvidia,tegra20-nand"),
  38         COMPAT(NVIDIA_TEGRA124_XUSB_PADCTL, "nvidia,tegra124-xusb-padctl"),
  39         COMPAT(NVIDIA_TEGRA210_XUSB_PADCTL, "nvidia,tegra210-xusb-padctl"),
  40         COMPAT(SMSC_LAN9215, "smsc,lan9215"),
  41         COMPAT(SAMSUNG_EXYNOS5_SROMC, "samsung,exynos-sromc"),
  42         COMPAT(SAMSUNG_S3C2440_I2C, "samsung,s3c2440-i2c"),
  43         COMPAT(SAMSUNG_EXYNOS5_SOUND, "samsung,exynos-sound"),
  44         COMPAT(WOLFSON_WM8994_CODEC, "wolfson,wm8994-codec"),
  45         COMPAT(SAMSUNG_EXYNOS_USB_PHY, "samsung,exynos-usb-phy"),
  46         COMPAT(SAMSUNG_EXYNOS5_USB3_PHY, "samsung,exynos5250-usb3-phy"),
  47         COMPAT(SAMSUNG_EXYNOS_TMU, "samsung,exynos-tmu"),
  48         COMPAT(SAMSUNG_EXYNOS_MIPI_DSI, "samsung,exynos-mipi-dsi"),
  49         COMPAT(SAMSUNG_EXYNOS_DWMMC, "samsung,exynos-dwmmc"),
  50         COMPAT(SAMSUNG_EXYNOS_MMC, "samsung,exynos-mmc"),
  51         COMPAT(MAXIM_MAX77686_PMIC, "maxim,max77686"),
  52         COMPAT(GENERIC_SPI_FLASH, "spi-flash"),
  53         COMPAT(MAXIM_98095_CODEC, "maxim,max98095-codec"),
  54         COMPAT(SAMSUNG_EXYNOS5_I2C, "samsung,exynos5-hsi2c"),
  55         COMPAT(SAMSUNG_EXYNOS_SYSMMU, "samsung,sysmmu-v3.3"),
  56         COMPAT(INTEL_MICROCODE, "intel,microcode"),
  57         COMPAT(AMS_AS3722, "ams,as3722"),
  58         COMPAT(INTEL_QRK_MRC, "intel,quark-mrc"),
  59         COMPAT(ALTERA_SOCFPGA_DWMAC, "altr,socfpga-stmmac"),
  60         COMPAT(ALTERA_SOCFPGA_DWMMC, "altr,socfpga-dw-mshc"),
  61         COMPAT(ALTERA_SOCFPGA_DWC2USB, "snps,dwc2"),
  62         COMPAT(INTEL_BAYTRAIL_FSP, "intel,baytrail-fsp"),
  63         COMPAT(INTEL_BAYTRAIL_FSP_MDP, "intel,baytrail-fsp-mdp"),
  64         COMPAT(INTEL_IVYBRIDGE_FSP, "intel,ivybridge-fsp"),
  65         COMPAT(COMPAT_SUNXI_NAND, "allwinner,sun4i-a10-nand"),
  66         COMPAT(ALTERA_SOCFPGA_CLK, "altr,clk-mgr"),
  67         COMPAT(ALTERA_SOCFPGA_PINCTRL_SINGLE, "pinctrl-single"),
  68         COMPAT(ALTERA_SOCFPGA_H2F_BRG, "altr,socfpga-hps2fpga-bridge"),
  69         COMPAT(ALTERA_SOCFPGA_LWH2F_BRG, "altr,socfpga-lwhps2fpga-bridge"),
  70         COMPAT(ALTERA_SOCFPGA_F2H_BRG, "altr,socfpga-fpga2hps-bridge"),
  71         COMPAT(ALTERA_SOCFPGA_F2SDR0, "altr,socfpga-fpga2sdram0-bridge"),
  72         COMPAT(ALTERA_SOCFPGA_F2SDR1, "altr,socfpga-fpga2sdram1-bridge"),
  73         COMPAT(ALTERA_SOCFPGA_F2SDR2, "altr,socfpga-fpga2sdram2-bridge"),
  74 };
  75
  76 const char *fdtdec_get_compatible(enum fdt_compat_id id)
  77 {
  78         /* We allow reading of the 'unknown' ID for testing purposes */
  79         assert(id >= 0 && id < COMPAT_COUNT);
  80         return compat_names[id];
  81 }
  82
  83 fdt_addr_t fdtdec_get_addr_size_fixed(const void *blob, int node,
  84                 const char *prop_name, int index, int na, int ns,
  85                 fdt_size_t *sizep, bool translate)
  86 {
  87         const fdt32_t *prop, *prop_end;
  88         const fdt32_t *prop_addr, *prop_size, *prop_after_size;
  89         int len;
  90         fdt_addr_t addr;
  91
  92         debug("%s: %s: ", __func__, prop_name);
  93
  94         if (na > (sizeof(fdt_addr_t) / sizeof(fdt32_t))) {
  95                 debug("(na too large for fdt_addr_t type)\n");
  96                 return FDT_ADDR_T_NONE;
  97         }
  98
  99         if (ns > (sizeof(fdt_size_t) / sizeof(fdt32_t))) {
 100                 debug("(ns too large for fdt_size_t type)\n");
 101                 return FDT_ADDR_T_NONE;
 102         }
 103
 104         prop = fdt_getprop(blob, node, prop_name, &len);
 105         if (!prop) {
 106                 debug("(not found)\n");
 107                 return FDT_ADDR_T_NONE;
 108         }
 109         prop_end = prop + (len / sizeof(*prop));
 110
 111         prop_addr = prop + (index * (na + ns));
 112         prop_size = prop_addr + na;
 113         prop_after_size = prop_size + ns;
 114         if (prop_after_size > prop_end) {
 115                 debug("(not enough data: expected >= %d cells, got %d cells)\n",
 116                       (u32)(prop_after_size - prop), ((u32)(prop_end - prop)));
 117                 return FDT_ADDR_T_NONE;
 118         }
 119
 120 #if CONFIG_IS_ENABLED(OF_TRANSLATE)
 121         if (translate)
 122                 addr = fdt_translate_address(blob, node, prop_addr);
 123         else
 124 #endif
 125                 addr = fdtdec_get_number(prop_addr, na);
 126
 127         if (sizep) {
 128                 *sizep = fdtdec_get_number(prop_size, ns);
 129                 debug("addr=%08llx, size=%llx\n", (unsigned long long)addr,
 130                       (unsigned long long)*sizep);
 131         } else {
 132                 debug("addr=%08llx\n", (unsigned long long)addr);
 133         }
 134
 135         return addr;
 136 }
 137
 138 fdt_addr_t fdtdec_get_addr_size_auto_parent(const void *blob, int parent,
 139                 int node, const char *prop_name, int index, fdt_size_t *sizep,
 140                 bool translate)
 141 {
 142         int na, ns;
 143
 144         debug("%s: ", __func__);
 145
 146         na = fdt_address_cells(blob, parent);
 147         if (na < 1) {
 148                 debug("(bad #address-cells)\n");
 149                 return FDT_ADDR_T_NONE;
 150         }
 151
 152         ns = fdt_size_cells(blob, parent);
 153         if (ns < 0) {
 154                 debug("(bad #size-cells)\n");
 155                 return FDT_ADDR_T_NONE;
 156         }
 157
 158         debug("na=%d, ns=%d, ", na, ns);
 159
 160         return fdtdec_get_addr_size_fixed(blob, node, prop_name, index, na,
 161                                           ns, sizep, translate);
 162 }
 163
 164 fdt_addr_t fdtdec_get_addr_size_auto_noparent(const void *blob, int node,
 165                 const char *prop_name, int index, fdt_size_t *sizep,
 166                 bool translate)
 167 {
 168         int parent;
 169
 170         debug("%s: ", __func__);
 171
 172         parent = fdt_parent_offset(blob, node);
 173         if (parent < 0) {
 174                 debug("(no parent found)\n");
 175                 return FDT_ADDR_T_NONE;
 176         }
 177
 178         return fdtdec_get_addr_size_auto_parent(blob, parent, node, prop_name,
 179                                                 index, sizep, translate);
 180 }
 181
 182 fdt_addr_t fdtdec_get_addr_size(const void *blob, int node,
 183                 const char *prop_name, fdt_size_t *sizep)
 184 {
 185         int ns = sizep ? (sizeof(fdt_size_t) / sizeof(fdt32_t)) : 0;
 186
 187         return fdtdec_get_addr_size_fixed(blob, node, prop_name, 0,
 188                                           sizeof(fdt_addr_t) / sizeof(fdt32_t),
 189                                           ns, sizep, false);
 190 }
 191
 192 fdt_addr_t fdtdec_get_addr(const void *blob, int node,
 193                 const char *prop_name)
 194 {
 195         return fdtdec_get_addr_size(blob, node, prop_name, NULL);
 196 }
 197
 198 #if defined(CONFIG_PCI) && defined(CONFIG_DM_PCI)
 199 int fdtdec_get_pci_addr(const void *blob, int node, enum fdt_pci_space type,
 200                 const char *prop_name, struct fdt_pci_addr *addr)
 201 {
 202         const u32 *cell;
 203         int len;
 204         int ret = -ENOENT;
 205
 206         debug("%s: %s: ", __func__, prop_name);
 207
 208         /*
 209          * If we follow the pci bus bindings strictly, we should check
 210          * the value of the node's parent node's #address-cells and
 211          * #size-cells. They need to be 3 and 2 accordingly. However,
 212          * for simplicity we skip the check here.
 213          */
 214         cell = fdt_getprop(blob, node, prop_name, &len);
 215         if (!cell)
 216                 goto fail;
 217
 218         if ((len % FDT_PCI_REG_SIZE) == 0) {
 219                 int num = len / FDT_PCI_REG_SIZE;
 220                 int i;
 221
 222                 for (i = 0; i < num; i++) {
 223                         debug("pci address #%d: %08lx %08lx %08lx\n", i,
 224                               (ulong)fdt32_to_cpu(cell[0]),
 225                               (ulong)fdt32_to_cpu(cell[1]),
 226                               (ulong)fdt32_to_cpu(cell[2]));
 227                         if ((fdt32_to_cpu(*cell) & type) == type) {
 228                                 addr->phys_hi = fdt32_to_cpu(cell[0]);
 229                                 addr->phys_mid = fdt32_to_cpu(cell[1]);
 230                                 addr->phys_lo = fdt32_to_cpu(cell[1]);
 231                                 break;
 232                         } else {
 233                                 cell += (FDT_PCI_ADDR_CELLS +
 234                                          FDT_PCI_SIZE_CELLS);
 235                         }
 236                 }
 237
 238                 if (i == num) {
 239                         ret = -ENXIO;
 240                         goto fail;
 241                 }
 242
 243                 return 0;
 244         } else {
 245                 ret = -EINVAL;
 246         }
 247
 248 fail:
 249         debug("(not found)\n");
 250         return ret;
 251 }
 252
 253 int fdtdec_get_pci_vendev(const void *blob, int node, u16 *vendor, u16 *device)
 254 {
 255         const char *list, *end;
 256         int len;
 257
 258         list = fdt_getprop(blob, node, "compatible", &len);
 259         if (!list)
 260                 return -ENOENT;
 261
 262         end = list + len;
 263         while (list < end) {
 264                 char *s;
 265
 266                 len = strlen(list);
 267                 if (len >= strlen("pciVVVV,DDDD")) {
 268                         s = strstr(list, "pci");
 269
 270                         /*
 271                          * check if the string is something like pciVVVV,DDDD.RR
 272                          * or just pciVVVV,DDDD
 273                          */
 274                         if (s && s[7] == ',' &&
 275                             (s[12] == '.' || s[12] == 0)) {
 276                                 s += 3;
 277                                 *vendor = simple_strtol(s, NULL, 16);
 278
 279                                 s += 5;
 280                                 *device = simple_strtol(s, NULL, 16);
 281
 282                                 return 0;
 283                         }
 284                 }
 285                 list += (len + 1);
 286         }
 287
 288         return -ENOENT;
 289 }
 290
 291 int fdtdec_get_pci_bar32(struct udevice *dev, struct fdt_pci_addr *addr,
 292                          u32 *bar)
 293 {
 294         int barnum;
 295
 296         /* extract the bar number from fdt_pci_addr */
 297         barnum = addr->phys_hi & 0xff;
 298         if ((barnum < PCI_BASE_ADDRESS_0) || (barnum > PCI_CARDBUS_CIS))
 299                 return -EINVAL;
 300
 301         barnum = (barnum - PCI_BASE_ADDRESS_0) / 4;
 302         *bar = dm_pci_read_bar32(dev, barnum);
 303
 304         return 0;
 305 }
 306 #endif
 307
 308 uint64_t fdtdec_get_uint64(const void *blob, int node, const char *prop_name,
 309                 uint64_t default_val)
 310 {
 311         const uint64_t *cell64;
 312         int length;
 313
 314         cell64 = fdt_getprop(blob, node, prop_name, &length);
 315         if (!cell64 || length < sizeof(*cell64))
 316                 return default_val;
 317
 318         return fdt64_to_cpu(*cell64);
 319 }
 320
 321 int fdtdec_get_is_enabled(const void *blob, int node)
 322 {
 323         const char *cell;
 324
 325         /*
 326          * It should say "okay", so only allow that. Some fdts use "ok" but
 327          * this is a bug. Please fix your device tree source file. See here
 328          * for discussion:
 329          *
 330          * http://www.mail-archive.com/u-boot@lists.denx.de/msg71598.html
 331          */
 332         cell = fdt_getprop(blob, node, "status", NULL);
 333         if (cell)
 334                 return 0 == strcmp(cell, "okay");
 335         return 1;
 336 }
 337
 338 enum fdt_compat_id fdtdec_lookup(const void *blob, int node)
 339 {
 340         enum fdt_compat_id id;
 341
 342         /* Search our drivers */
 343         for (id = COMPAT_UNKNOWN; id < COMPAT_COUNT; id++)
 344                 if (0 == fdt_node_check_compatible(blob, node,
 345                                 compat_names[id]))
 346                         return id;
 347         return COMPAT_UNKNOWN;
 348 }
 349
 350 int fdtdec_next_compatible(const void *blob, int node,
 351                 enum fdt_compat_id id)
 352 {
 353         return fdt_node_offset_by_compatible(blob, node, compat_names[id]);
 354 }
 355
 356 int fdtdec_next_compatible_subnode(const void *blob, int node,
 357                 enum fdt_compat_id id, int *depthp)
 358 {
 359         do {
 360                 node = fdt_next_node(blob, node, depthp);
 361         } while (*depthp > 1);
 362
 363         /* If this is a direct subnode, and compatible, return it */
 364         if (*depthp == 1 && 0 == fdt_node_check_compatible(
 365                                                 blob, node, compat_names[id]))
 366                 return node;
 367
 368         return -FDT_ERR_NOTFOUND;
 369 }
 370
 371 int fdtdec_next_alias(const void *blob, const char *name,
 372                 enum fdt_compat_id id, int *upto)
 373 {
 374 #define MAX_STR_LEN 20
 375         char str[MAX_STR_LEN + 20];
 376         int node, err;
 377
 378         /* snprintf() is not available */
 379         assert(strlen(name) < MAX_STR_LEN);
 380         sprintf(str, "%.*s%d", MAX_STR_LEN, name, *upto);
 381         node = fdt_path_offset(blob, str);
 382         if (node < 0)
 383                 return node;
 384         err = fdt_node_check_compatible(blob, node, compat_names[id]);
 385         if (err < 0)
 386                 return err;
 387         if (err)
 388                 return -FDT_ERR_NOTFOUND;
 389         (*upto)++;
 390         return node;
 391 }
 392
 393 int fdtdec_find_aliases_for_id(const void *blob, const char *name,
 394                         enum fdt_compat_id id, int *node_list, int maxcount)
 395 {
 396         memset(node_list, '\0', sizeof(*node_list) * maxcount);
 397
 398         return fdtdec_add_aliases_for_id(blob, name, id, node_list, maxcount);
 399 }
 400
 401 /* TODO: Can we tighten this code up a little? */
 402 int fdtdec_add_aliases_for_id(const void *blob, const char *name,
 403                         enum fdt_compat_id id, int *node_list, int maxcount)
 404 {
 405         int name_len = strlen(name);
 406         int nodes[maxcount];
 407         int num_found = 0;
 408         int offset, node;
 409         int alias_node;
 410         int count;
 411         int i, j;
 412
 413         /* find the alias node if present */
 414         alias_node = fdt_path_offset(blob, "/aliases");
 415
 416         /*
 417          * start with nothing, and we can assume that the root node can't
 418          * match
 419          */
 420         memset(nodes, '\0', sizeof(nodes));
 421
 422         /* First find all the compatible nodes */
 423         for (node = count = 0; node >= 0 && count < maxcount;) {
 424                 node = fdtdec_next_compatible(blob, node, id);
 425                 if (node >= 0)
 426                         nodes[count++] = node;
 427         }
 428         if (node >= 0)
 429                 debug("%s: warning: maxcount exceeded with alias '%s'\n",
 430                        __func__, name);
 431
 432         /* Now find all the aliases */
 433         for (offset = fdt_first_property_offset(blob, alias_node);
 434                         offset > 0;
 435                         offset = fdt_next_property_offset(blob, offset)) {
 436                 const struct fdt_property *prop;
 437                 const char *path;
 438                 int number;
 439                 int found;
 440
 441                 node = 0;
 442                 prop = fdt_get_property_by_offset(blob, offset, NULL);
 443                 path = fdt_string(blob, fdt32_to_cpu(prop->nameoff));
 444                 if (prop->len && 0 == strncmp(path, name, name_len))
 445                         node = fdt_path_offset(blob, prop->data);
 446                 if (node <= 0)
 447                         continue;
 448
 449                 /* Get the alias number */
 450                 number = simple_strtoul(path + name_len, NULL, 10);
 451                 if (number < 0 || number >= maxcount) {
 452                         debug("%s: warning: alias '%s' is out of range\n",
 453                                __func__, path);
 454                         continue;
 455                 }
 456
 457                 /* Make sure the node we found is actually in our list! */
 458                 found = -1;
 459                 for (j = 0; j < count; j++)
 460                         if (nodes[j] == node) {
 461                                 found = j;
 462                                 break;
 463                         }
 464
 465                 if (found == -1) {
 466                         debug("%s: warning: alias '%s' points to a node "
 467                                 "'%s' that is missing or is not compatible "
 468                                 " with '%s'\n", __func__, path,
 469                                 fdt_get_name(blob, node, NULL),
 470                                compat_names[id]);
 471                         continue;
 472                 }
 473
 474                 /*
 475                  * Add this node to our list in the right place, and mark
 476                  * it as done.
 477                  */
 478                 if (fdtdec_get_is_enabled(blob, node)) {
 479                         if (node_list[number]) {
 480                                 debug("%s: warning: alias '%s' requires that "
 481                                       "a node be placed in the list in a "
 482                                       "position which is already filled by "
 483                                       "node '%s'\n", __func__, path,
 484                                       fdt_get_name(blob, node, NULL));
 485                                 continue;
 486                         }
 487                         node_list[number] = node;
 488                         if (number >= num_found)
 489                                 num_found = number + 1;
 490                 }
 491                 nodes[found] = 0;
 492         }
 493
 494         /* Add any nodes not mentioned by an alias */
 495         for (i = j = 0; i < maxcount; i++) {
 496                 if (!node_list[i]) {
 497                         for (; j < maxcount; j++)
 498                                 if (nodes[j] &&
 499                                         fdtdec_get_is_enabled(blob, nodes[j]))
 500                                         break;
 501
 502                         /* Have we run out of nodes to add? */
 503                         if (j == maxcount)
 504                                 break;
 505
 506                         assert(!node_list[i]);
 507                         node_list[i] = nodes[j++];
 508                         if (i >= num_found)
 509                                 num_found = i + 1;
 510                 }
 511         }
 512
 513         return num_found;
 514 }
 515
 516 int fdtdec_get_alias_seq(const void *blob, const char *base, int offset,
 517                          int *seqp)
 518 {
 519         int base_len = strlen(base);
 520         const char *find_name;
 521         int find_namelen;
 522         int prop_offset;
 523         int aliases;
 524
 525         find_name = fdt_get_name(blob, offset, &find_namelen);
 526         debug("Looking for '%s' at %d, name %s\n", base, offset, find_name);
 527
 528         aliases = fdt_path_offset(blob, "/aliases");
 529         for (prop_offset = fdt_first_property_offset(blob, aliases);
 530              prop_offset > 0;
 531              prop_offset = fdt_next_property_offset(blob, prop_offset)) {
 532                 const char *prop;
 533                 const char *name;
 534                 const char *slash;
 535                 int len, val;
 536
 537                 prop = fdt_getprop_by_offset(blob, prop_offset, &name, &len);
 538                 debug("   - %s, %s\n", name, prop);
 539                 if (len < find_namelen || *prop != '/' || prop[len - 1] ||
 540                     strncmp(name, base, base_len))
 541                         continue;
 542
 543                 slash = strrchr(prop, '/');
 544                 if (strcmp(slash + 1, find_name))
 545                         continue;
 546                 val = trailing_strtol(name);
 547                 if (val != -1) {
 548                         *seqp = val;
 549                         debug("Found seq %d\n", *seqp);
 550                         return 0;
 551                 }
 552         }
 553
 554         debug("Not found\n");
 555         return -ENOENT;
 556 }
 557
 558 const char *fdtdec_get_chosen_prop(const void *blob, const char *name)
 559 {
 560         int chosen_node;
 561
 562         if (!blob)
 563                 return NULL;
 564         chosen_node = fdt_path_offset(blob, "/chosen");
 565         return fdt_getprop(blob, chosen_node, name, NULL);
 566 }
 567
 568 int fdtdec_get_chosen_node(const void *blob, const char *name)
 569 {
 570         const char *prop;
 571
 572         prop = fdtdec_get_chosen_prop(blob, name);
 573         if (!prop)
 574                 return -FDT_ERR_NOTFOUND;
 575         return fdt_path_offset(blob, prop);
 576 }
 577
 578 int fdtdec_check_fdt(void)
 579 {
 580         /*
 581          * We must have an FDT, but we cannot panic() yet since the console
 582          * is not ready. So for now, just assert(). Boards which need an early
 583          * FDT (prior to console ready) will need to make their own
 584          * arrangements and do their own checks.
 585          */
 586         assert(!fdtdec_prepare_fdt());
 587         return 0;
 588 }
 589
 590 /*
 591  * This function is a little odd in that it accesses global data. At some
 592  * point if the architecture board.c files merge this will make more sense.
 593  * Even now, it is common code.
 594  */
 595 int fdtdec_prepare_fdt(void)
 596 {
 597         if (!gd->fdt_blob || ((uintptr_t)gd->fdt_blob & 3) ||
 598             fdt_check_header(gd->fdt_blob)) {
 599 #ifdef CONFIG_SPL_BUILD
 600                 puts("Missing DTB\n");
 601 #else
 602                 puts("No valid device tree binary found - please append one to U-Boot binary, use u-boot-dtb.bin or define CONFIG_OF_EMBED. For sandbox, use -d <file.dtb>\n");
 603 # ifdef DEBUG
 604                 if (gd->fdt_blob) {
 605                         printf("fdt_blob=%p\n", gd->fdt_blob);
 606                         print_buffer((ulong)gd->fdt_blob, gd->fdt_blob, 4,
 607                                      32, 0);
 608                 }
 609 # endif
 610 #endif
 611                 return -1;
 612         }
 613         return 0;
 614 }
 615
 616 int fdtdec_lookup_phandle(const void *blob, int node, const char *prop_name)
 617 {
 618         const u32 *phandle;
 619         int lookup;
 620
 621         debug("%s: %s\n", __func__, prop_name);
 622         phandle = fdt_getprop(blob, node, prop_name, NULL);
 623         if (!phandle)
 624                 return -FDT_ERR_NOTFOUND;
 625
 626         lookup = fdt_node_offset_by_phandle(blob, fdt32_to_cpu(*phandle));
 627         return lookup;
 628 }
 629
 630 /**
 631  * Look up a property in a node and check that it has a minimum length.
 632  *
 633  * @param blob          FDT blob
 634  * @param node          node to examine
 635  * @param prop_name     name of property to find
 636  * @param min_len       minimum property length in bytes
 637  * @param err           0 if ok, or -FDT_ERR_NOTFOUND if the property is not
 638                         found, or -FDT_ERR_BADLAYOUT if not enough data
 639  * @return pointer to cell, which is only valid if err == 0
 640  */
 641 static const void *get_prop_check_min_len(const void *blob, int node,
 642                 const char *prop_name, int min_len, int *err)
 643 {
 644         const void *cell;
 645         int len;
 646
 647         debug("%s: %s\n", __func__, prop_name);
 648         cell = fdt_getprop(blob, node, prop_name, &len);
 649         if (!cell)
 650                 *err = -FDT_ERR_NOTFOUND;
 651         else if (len < min_len)
 652                 *err = -FDT_ERR_BADLAYOUT;
 653         else
 654                 *err = 0;
 655         return cell;
 656 }
 657
 658 int fdtdec_get_int_array(const void *blob, int node, const char *prop_name,
 659                 u32 *array, int count)
 660 {
 661         const u32 *cell;
 662         int i, err = 0;
 663
 664         debug("%s: %s\n", __func__, prop_name);
 665         cell = get_prop_check_min_len(blob, node, prop_name,
 666                                       sizeof(u32) * count, &err);
 667         if (!err) {
 668                 for (i = 0; i < count; i++)
 669                         array[i] = fdt32_to_cpu(cell[i]);
 670         }
 671         return err;
 672 }
 673
 674 int fdtdec_get_int_array_count(const void *blob, int node,
 675                                const char *prop_name, u32 *array, int count)
 676 {
 677         const u32 *cell;
 678         int len, elems;
 679         int i;
 680
 681         debug("%s: %s\n", __func__, prop_name);
 682         cell = fdt_getprop(blob, node, prop_name, &len);
 683         if (!cell)
 684                 return -FDT_ERR_NOTFOUND;
 685         elems = len / sizeof(u32);
 686         if (count > elems)
 687                 count = elems;
 688         for (i = 0; i < count; i++)
 689                 array[i] = fdt32_to_cpu(cell[i]);
 690
 691         return count;
 692 }
 693
 694 const u32 *fdtdec_locate_array(const void *blob, int node,
 695                                const char *prop_name, int count)
 696 {
 697         const u32 *cell;
 698         int err;
 699
 700         cell = get_prop_check_min_len(blob, node, prop_name,
 701                                       sizeof(u32) * count, &err);
 702         return err ? NULL : cell;
 703 }
 704
 705 int fdtdec_get_bool(const void *blob, int node, const char *prop_name)
 706 {
 707         const s32 *cell;
 708         int len;
 709
 710         debug("%s: %s\n", __func__, prop_name);
 711         cell = fdt_getprop(blob, node, prop_name, &len);
 712         return cell != NULL;
 713 }
 714
 715 int fdtdec_parse_phandle_with_args(const void *blob, int src_node,
 716                                    const char *list_name,
 717                                    const char *cells_name,
 718                                    int cell_count, int index,
 719                                    struct fdtdec_phandle_args *out_args)
 720 {
 721         const __be32 *list, *list_end;
 722         int rc = 0, size, cur_index = 0;
 723         uint32_t count = 0;
 724         int node = -1;
 725         int phandle;
 726
 727         /* Retrieve the phandle list property */
 728         list = fdt_getprop(blob, src_node, list_name, &size);
 729         if (!list)
 730                 return -ENOENT;
 731         list_end = list + size / sizeof(*list);
 732
 733         /* Loop over the phandles until all the requested entry is found */
 734         while (list < list_end) {
 735                 rc = -EINVAL;
 736                 count = 0;
 737
 738                 /*
 739                  * If phandle is 0, then it is an empty entry with no
 740                  * arguments.  Skip forward to the next entry.
 741                  */
 742                 phandle = be32_to_cpup(list++);
 743                 if (phandle) {
 744                         /*
 745                          * Find the provider node and parse the #*-cells
 746                          * property to determine the argument length.
 747                          *
 748                          * This is not needed if the cell count is hard-coded
 749                          * (i.e. cells_name not set, but cell_count is set),
 750                          * except when we're going to return the found node
 751                          * below.
 752                          */
 753                         if (cells_name || cur_index == index) {
 754                                 node = fdt_node_offset_by_phandle(blob,
 755                                                                   phandle);
 756                                 if (!node) {
 757                                         debug("%s: could not find phandle\n",
 758                                               fdt_get_name(blob, src_node,
 759                                                            NULL));
 760                                         goto err;
 761                                 }
 762                         }
 763
 764                         if (cells_name) {
 765                                 count = fdtdec_get_int(blob, node, cells_name,
 766                                                        -1);
 767                                 if (count == -1) {
 768                                         debug("%s: could not get %s for %s\n",
 769                                               fdt_get_name(blob, src_node,
 770                                                            NULL),
 771                                               cells_name,
 772                                               fdt_get_name(blob, node,
 773                                                            NULL));
 774                                         goto err;
 775                                 }
 776                         } else {
 777                                 count = cell_count;
 778                         }
 779
 780                         /*
 781                          * Make sure that the arguments actually fit in the
 782                          * remaining property data length
 783                          */
 784                         if (list + count > list_end) {
 785                                 debug("%s: arguments longer than property\n",
 786                                       fdt_get_name(blob, src_node, NULL));
 787                                 goto err;
 788                         }
 789                 }
 790
 791                 /*
 792                  * All of the error cases above bail out of the loop, so at
 793                  * this point, the parsing is successful. If the requested
 794                  * index matches, then fill the out_args structure and return,
 795                  * or return -ENOENT for an empty entry.
 796                  */
 797                 rc = -ENOENT;
 798                 if (cur_index == index) {
 799                         if (!phandle)
 800                                 goto err;
 801
 802                         if (out_args) {
 803                                 int i;
 804
 805                                 if (count > MAX_PHANDLE_ARGS) {
 806                                         debug("%s: too many arguments %d\n",
 807                                               fdt_get_name(blob, src_node,
 808                                                            NULL), count);
 809                                         count = MAX_PHANDLE_ARGS;
 810                                 }
 811                                 out_args->node = node;
 812                                 out_args->args_count = count;
 813                                 for (i = 0; i < count; i++) {
 814                                         out_args->args[i] =
 815                                                         be32_to_cpup(list++);
 816                                 }
 817                         }
 818
 819                         /* Found it! return success */
 820                         return 0;
 821                 }
 822
 823                 node = -1;
 824                 list += count;
 825                 cur_index++;
 826         }
 827
 828         /*
 829          * Result will be one of:
 830          * -ENOENT : index is for empty phandle
 831          * -EINVAL : parsing error on data
 832          * [1..n]  : Number of phandle (count mode; when index = -1)
 833          */
 834         rc = index < 0 ? cur_index : -ENOENT;
 835  err:
 836         return rc;
 837 }
 838
 839 int fdtdec_get_child_count(const void *blob, int node)
 840 {
 841         int subnode;
 842         int num = 0;
 843
 844         fdt_for_each_subnode(subnode, blob, node)
 845                 num++;
 846
 847         return num;
 848 }
 849
 850 int fdtdec_get_byte_array(const void *blob, int node, const char *prop_name,
 851                 u8 *array, int count)
 852 {
 853         const u8 *cell;
 854         int err;
 855
 856         cell = get_prop_check_min_len(blob, node, prop_name, count, &err);
 857         if (!err)
 858                 memcpy(array, cell, count);
 859         return err;
 860 }
 861
 862 const u8 *fdtdec_locate_byte_array(const void *blob, int node,
 863                              const char *prop_name, int count)
 864 {
 865         const u8 *cell;
 866         int err;
 867
 868         cell = get_prop_check_min_len(blob, node, prop_name, count, &err);
 869         if (err)
 870                 return NULL;
 871         return cell;
 872 }
 873
 874 int fdtdec_get_config_int(const void *blob, const char *prop_name,
 875                 int default_val)
 876 {
 877         int config_node;
 878
 879         debug("%s: %s\n", __func__, prop_name);
 880         config_node = fdt_path_offset(blob, "/config");
 881         if (config_node < 0)
 882                 return default_val;
 883         return fdtdec_get_int(blob, config_node, prop_name, default_val);
 884 }
 885
 886 int fdtdec_get_config_bool(const void *blob, const char *prop_name)
 887 {
 888         int config_node;
 889         const void *prop;
 890
 891         debug("%s: %s\n", __func__, prop_name);
 892         config_node = fdt_path_offset(blob, "/config");
 893         if (config_node < 0)
 894                 return 0;
 895         prop = fdt_get_property(blob, config_node, prop_name, NULL);
 896
 897         return prop != NULL;
 898 }
 899
 900 char *fdtdec_get_config_string(const void *blob, const char *prop_name)
 901 {
 902         const char *nodep;
 903         int nodeoffset;
 904         int len;
 905
 906         debug("%s: %s\n", __func__, prop_name);
 907         nodeoffset = fdt_path_offset(blob, "/config");
 908         if (nodeoffset < 0)
 909                 return NULL;
 910
 911         nodep = fdt_getprop(blob, nodeoffset, prop_name, &len);
 912         if (!nodep)
 913                 return NULL;
 914
 915         return (char *)nodep;
 916 }
 917
 918 int fdtdec_decode_region(const void *blob, int node, const char *prop_name,
 919                          fdt_addr_t *basep, fdt_size_t *sizep)
 920 {
 921         const fdt_addr_t *cell;
 922         int len;
 923
 924         debug("%s: %s: %s\n", __func__, fdt_get_name(blob, node, NULL),
 925               prop_name);
 926         cell = fdt_getprop(blob, node, prop_name, &len);
 927         if (!cell || (len < sizeof(fdt_addr_t) * 2)) {
 928                 debug("cell=%p, len=%d\n", cell, len);
 929                 return -1;
 930         }
 931
 932         *basep = fdt_addr_to_cpu(*cell);
 933         *sizep = fdt_size_to_cpu(cell[1]);
 934         debug("%s: base=%08lx, size=%lx\n", __func__, (ulong)*basep,
 935               (ulong)*sizep);
 936
 937         return 0;
 938 }
 939
 940 u64 fdtdec_get_number(const fdt32_t *ptr, unsigned int cells)
 941 {
 942         u64 number = 0;
 943
 944         while (cells--)
 945                 number = (number << 32) | fdt32_to_cpu(*ptr++);
 946
 947         return number;
 948 }
 949
 950 int fdt_get_resource(const void *fdt, int node, const char *property,
 951                      unsigned int index, struct fdt_resource *res)
 952 {
 953         const fdt32_t *ptr, *end;
 954         int na, ns, len, parent;
 955         unsigned int i = 0;
 956
 957         parent = fdt_parent_offset(fdt, node);
 958         if (parent < 0)
 959                 return parent;
 960
 961         na = fdt_address_cells(fdt, parent);
 962         ns = fdt_size_cells(fdt, parent);
 963
 964         ptr = fdt_getprop(fdt, node, property, &len);
 965         if (!ptr)
 966                 return len;
 967
 968         end = ptr + len / sizeof(*ptr);
 969
 970         while (ptr + na + ns <= end) {
 971                 if (i == index) {
 972                         res->start = res->end = fdtdec_get_number(ptr, na);
 973                         res->end += fdtdec_get_number(&ptr[na], ns) - 1;
 974                         return 0;
 975                 }
 976
 977                 ptr += na + ns;
 978                 i++;
 979         }
 980
 981         return -FDT_ERR_NOTFOUND;
 982 }
 983
 984 int fdt_get_named_resource(const void *fdt, int node, const char *property,
 985                            const char *prop_names, const char *name,
 986                            struct fdt_resource *res)
 987 {
 988         int index;
 989
 990         index = fdt_stringlist_search(fdt, node, prop_names, name);
 991         if (index < 0)
 992                 return index;
 993
 994         return fdt_get_resource(fdt, node, property, index, res);
 995 }
 996
 997 int fdtdec_decode_memory_region(const void *blob, int config_node,
 998                                 const char *mem_type, const char *suffix,
 999                                 fdt_addr_t *basep, fdt_size_t *sizep)
1000 {
1001         char prop_name[50];
1002         const char *mem;
1003         fdt_size_t size, offset_size;
1004         fdt_addr_t base, offset;
1005         int node;
1006
1007         if (config_node == -1) {
1008                 config_node = fdt_path_offset(blob, "/config");
1009                 if (config_node < 0) {
1010                         debug("%s: Cannot find /config node\n", __func__);
1011                         return -ENOENT;
1012                 }
1013         }
1014         if (!suffix)
1015                 suffix = "";
1016
1017         snprintf(prop_name, sizeof(prop_name), "%s-memory%s", mem_type,
1018                  suffix);
1019         mem = fdt_getprop(blob, config_node, prop_name, NULL);
1020         if (!mem) {
1021                 debug("%s: No memory type for '%s', using /memory\n", __func__,
1022                       prop_name);
1023                 mem = "/memory";
1024         }
1025
1026         node = fdt_path_offset(blob, mem);
1027         if (node < 0) {
1028                 debug("%s: Failed to find node '%s': %s\n", __func__, mem,
1029                       fdt_strerror(node));
1030                 return -ENOENT;
1031         }
1032
1033         /*
1034          * Not strictly correct - the memory may have multiple banks. We just
1035          * use the first
1036          */
1037         if (fdtdec_decode_region(blob, node, "reg", &base, &size)) {
1038                 debug("%s: Failed to decode memory region %s\n", __func__,
1039                       mem);
1040                 return -EINVAL;
1041         }
1042
1043         snprintf(prop_name, sizeof(prop_name), "%s-offset%s", mem_type,
1044                  suffix);
1045         if (fdtdec_decode_region(blob, config_node, prop_name, &offset,
1046                                  &offset_size)) {
1047                 debug("%s: Failed to decode memory region '%s'\n", __func__,
1048                       prop_name);
1049                 return -EINVAL;
1050         }
1051
1052         *basep = base + offset;
1053         *sizep = offset_size;
1054
1055         return 0;
1056 }
1057
1058 static int decode_timing_property(const void *blob, int node, const char *name,
1059                                   struct timing_entry *result)
1060 {
1061         int length, ret = 0;
1062         const u32 *prop;
1063
1064         prop = fdt_getprop(blob, node, name, &length);
1065         if (!prop) {
1066                 debug("%s: could not find property %s\n",
1067                       fdt_get_name(blob, node, NULL), name);
1068                 return length;
1069         }
1070
1071         if (length == sizeof(u32)) {
1072                 result->typ = fdtdec_get_int(blob, node, name, 0);
1073                 result->min = result->typ;
1074                 result->max = result->typ;
1075         } else {
1076                 ret = fdtdec_get_int_array(blob, node, name, &result->min, 3);
1077         }
1078
1079         return ret;
1080 }
1081
1082 int fdtdec_decode_display_timing(const void *blob, int parent, int index,
1083                                  struct display_timing *dt)
1084 {
1085         int i, node, timings_node;
1086         u32 val = 0;
1087         int ret = 0;
1088
1089         timings_node = fdt_subnode_offset(blob, parent, "display-timings");
1090         if (timings_node < 0)
1091                 return timings_node;
1092
1093         for (i = 0, node = fdt_first_subnode(blob, timings_node);
1094              node > 0 && i != index;
1095              node = fdt_next_subnode(blob, node))
1096                 i++;
1097
1098         if (node < 0)
1099                 return node;
1100
1101         memset(dt, 0, sizeof(*dt));
1102
1103         ret |= decode_timing_property(blob, node, "hback-porch",
1104                                       &dt->hback_porch);
1105         ret |= decode_timing_property(blob, node, "hfront-porch",
1106                                       &dt->hfront_porch);
1107         ret |= decode_timing_property(blob, node, "hactive", &dt->hactive);
1108         ret |= decode_timing_property(blob, node, "hsync-len", &dt->hsync_len);
1109         ret |= decode_timing_property(blob, node, "vback-porch",
1110                                       &dt->vback_porch);
1111         ret |= decode_timing_property(blob, node, "vfront-porch",
1112                                       &dt->vfront_porch);
1113         ret |= decode_timing_property(blob, node, "vactive", &dt->vactive);
1114         ret |= decode_timing_property(blob, node, "vsync-len", &dt->vsync_len);
1115         ret |= decode_timing_property(blob, node, "clock-frequency",
1116                                       &dt->pixelclock);
1117
1118         dt->flags = 0;
1119         val = fdtdec_get_int(blob, node, "vsync-active", -1);
1120         if (val != -1) {
1121                 dt->flags |= val ? DISPLAY_FLAGS_VSYNC_HIGH :
1122                                 DISPLAY_FLAGS_VSYNC_LOW;
1123         }
1124         val = fdtdec_get_int(blob, node, "hsync-active", -1);
1125         if (val != -1) {
1126                 dt->flags |= val ? DISPLAY_FLAGS_HSYNC_HIGH :
1127                                 DISPLAY_FLAGS_HSYNC_LOW;
1128         }
1129         val = fdtdec_get_int(blob, node, "de-active", -1);
1130         if (val != -1) {
1131                 dt->flags |= val ? DISPLAY_FLAGS_DE_HIGH :
1132                                 DISPLAY_FLAGS_DE_LOW;
1133         }
1134         val = fdtdec_get_int(blob, node, "pixelclk-active", -1);
1135         if (val != -1) {
1136                 dt->flags |= val ? DISPLAY_FLAGS_PIXDATA_POSEDGE :
1137                                 DISPLAY_FLAGS_PIXDATA_NEGEDGE;
1138         }
1139
1140         if (fdtdec_get_bool(blob, node, "interlaced"))
1141                 dt->flags |= DISPLAY_FLAGS_INTERLACED;
1142         if (fdtdec_get_bool(blob, node, "doublescan"))
1143                 dt->flags |= DISPLAY_FLAGS_DOUBLESCAN;
1144         if (fdtdec_get_bool(blob, node, "doubleclk"))
1145                 dt->flags |= DISPLAY_FLAGS_DOUBLECLK;
1146
1147         return ret;
1148 }
1149
1150 int fdtdec_setup_memory_size(void)
1151 {
1152         int ret, mem;
1153         struct fdt_resource res;
1154
1155         mem = fdt_path_offset(gd->fdt_blob, "/memory");
1156         if (mem < 0) {
1157                 debug("%s: Missing /memory node\n", __func__);
1158                 return -EINVAL;
1159         }
1160
1161         ret = fdt_get_resource(gd->fdt_blob, mem, "reg", 0, &res);
1162         if (ret != 0) {
1163                 debug("%s: Unable to decode first memory bank\n", __func__);
1164                 return -EINVAL;
1165         }
1166
1167         gd->ram_size = (phys_size_t)(res.end - res.start + 1);
1168         debug("%s: Initial DRAM size %llx\n", __func__,
1169               (unsigned long long)gd->ram_size);
1170
1171         return 0;
1172 }
1173
1174 #if defined(CONFIG_NR_DRAM_BANKS)
1175 int fdtdec_setup_memory_banksize(void)
1176 {
1177         int bank, ret, mem;
1178         struct fdt_resource res;
1179
1180         mem = fdt_path_offset(gd->fdt_blob, "/memory");
1181         if (mem < 0) {
1182                 debug("%s: Missing /memory node\n", __func__);
1183                 return -EINVAL;
1184         }
1185
1186         for (bank = 0; bank < CONFIG_NR_DRAM_BANKS; bank++) {
1187                 ret = fdt_get_resource(gd->fdt_blob, mem, "reg", bank, &res);
1188                 if (ret == -FDT_ERR_NOTFOUND)
1189                         break;
1190                 if (ret != 0)
1191                         return -EINVAL;
1192
1193                 gd->bd->bi_dram[bank].start = (phys_addr_t)res.start;
1194                 gd->bd->bi_dram[bank].size =
1195                         (phys_size_t)(res.end - res.start + 1);
1196
1197                 debug("%s: DRAM Bank #%d: start = 0x%llx, size = 0x%llx\n",
1198                       __func__, bank,
1199                       (unsigned long long)gd->bd->bi_dram[bank].start,
1200                       (unsigned long long)gd->bd->bi_dram[bank].size);
1201         }
1202
1203         return 0;
1204 }
1205 #endif
1206
1207 #if CONFIG_IS_ENABLED(MULTI_DTB_FIT)
1208 # if CONFIG_IS_ENABLED(MULTI_DTB_FIT_GZIP) ||\
1209         CONFIG_IS_ENABLED(MULTI_DTB_FIT_LZO)
1210 static int uncompress_blob(const void *src, ulong sz_src, void **dstp)
1211 {
1212         size_t sz_out = CONFIG_SPL_MULTI_DTB_FIT_UNCOMPRESS_SZ;
1213         ulong sz_in = sz_src;
1214         void *dst;
1215         int rc;
1216
1217         if (CONFIG_IS_ENABLED(GZIP))
1218                 if (gzip_parse_header(src, sz_in) < 0)
1219                         return -1;
1220         if (CONFIG_IS_ENABLED(LZO))
1221                 if (!lzop_is_valid_header(src))
1222                         return -EBADMSG;
1223
1224         if (CONFIG_IS_ENABLED(MULTI_DTB_FIT_DYN_ALLOC)) {
1225                 dst = malloc(sz_out);
1226                 if (!dst) {
1227                         puts("uncompress_blob: Unable to allocate memory\n");
1228                         return -ENOMEM;
1229                 }
1230         } else  {
1231 #  if CONFIG_IS_ENABLED(MULTI_DTB_FIT_USER_DEFINED_AREA)
1232                 dst = (void *)CONFIG_VAL(MULTI_DTB_FIT_USER_DEF_ADDR);
1233 #  else
1234                 return -ENOTSUPP;
1235 #  endif
1236         }
1237
1238         if (CONFIG_IS_ENABLED(GZIP))
1239                 rc = gunzip(dst, sz_out, (u8 *)src, &sz_in);
1240         else if (CONFIG_IS_ENABLED(LZO))
1241                 rc = lzop_decompress(src, sz_in, dst, &sz_out);
1242
1243         if (rc < 0) {
1244                 /* not a valid compressed blob */
1245                 puts("uncompress_blob: Unable to uncompress\n");
1246                 if (CONFIG_IS_ENABLED(MULTI_DTB_FIT_DYN_ALLOC))
1247                         free(dst);
1248                 return -EBADMSG;
1249         }
1250         *dstp = dst;
1251         return 0;
1252 }
1253 # else
1254 static int uncompress_blob(const void *src, ulong sz_src, void **dstp)
1255 {
1256         return -ENOTSUPP;
1257 }
1258 # endif
1259 #endif
1260
1261 int fdtdec_setup(void)
1262 {
1263 #if CONFIG_IS_ENABLED(OF_CONTROL)
1264 # if CONFIG_IS_ENABLED(MULTI_DTB_FIT)
1265         void *fdt_blob;
1266 # endif
1267 # ifdef CONFIG_OF_EMBED
1268         /* Get a pointer to the FDT */
1269         gd->fdt_blob = __dtb_dt_begin;
1270 # elif defined CONFIG_OF_SEPARATE
1271 #  ifdef CONFIG_SPL_BUILD
1272         /* FDT is at end of BSS unless it is in a different memory region */
1273         if (IS_ENABLED(CONFIG_SPL_SEPARATE_BSS))
1274                 gd->fdt_blob = (ulong *)&_image_binary_end;
1275         else
1276                 gd->fdt_blob = (ulong *)&__bss_end;
1277 #  else
1278         /* FDT is at end of image */
1279         gd->fdt_blob = (ulong *)&_end;
1280 #  endif
1281 # elif defined(CONFIG_OF_BOARD)
1282         /* Allow the board to override the fdt address. */
1283         gd->fdt_blob = board_fdt_blob_setup();
1284 # elif defined(CONFIG_OF_HOSTFILE)
1285         if (sandbox_read_fdt_from_file()) {
1286                 puts("Failed to read control FDT\n");
1287                 return -1;
1288         }
1289 # endif
1290 # ifndef CONFIG_SPL_BUILD
1291         /* Allow the early environment to override the fdt address */
1292         gd->fdt_blob = (void *)env_get_ulong("fdtcontroladdr", 16,
1293                                                 (uintptr_t)gd->fdt_blob);
1294 # endif
1295
1296 # if CONFIG_IS_ENABLED(MULTI_DTB_FIT)
1297         /*
1298          * Try and uncompress the blob.
1299          * Unfortunately there is no way to know how big the input blob really
1300          * is. So let us set the maximum input size arbitrarily high. 16MB
1301          * ought to be more than enough for packed DTBs.
1302          */
1303         if (uncompress_blob(gd->fdt_blob, 0x1000000, &fdt_blob) == 0)
1304                 gd->fdt_blob = fdt_blob;
1305
1306         /*
1307          * Check if blob is a FIT images containings DTBs.
1308          * If so, pick the most relevant
1309          */
1310         fdt_blob = locate_dtb_in_fit(gd->fdt_blob);
1311         if (fdt_blob)
1312                 gd->fdt_blob = fdt_blob;
1313 # endif
1314 #endif
1315
1316         return fdtdec_prepare_fdt();
1317 }
1318
1319 #endif /* !USE_HOSTCC */