uboot/common/spl/spl_fit.c
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   1// SPDX-License-Identifier: GPL-2.0+
   2/*
   3 * Copyright (C) 2016 Google, Inc
   4 * Written by Simon Glass <sjg@chromium.org>
   5 */
   6
   7#include <common.h>
   8#include <errno.h>
   9#include <fpga.h>
  10#include <gzip.h>
  11#include <image.h>
  12#include <log.h>
  13#include <malloc.h>
  14#include <mapmem.h>
  15#include <spl.h>
  16#include <sysinfo.h>
  17#include <asm/cache.h>
  18#include <asm/global_data.h>
  19#include <linux/libfdt.h>
  20
  21DECLARE_GLOBAL_DATA_PTR;
  22
  23#ifndef CONFIG_SPL_LOAD_FIT_APPLY_OVERLAY_BUF_SZ
  24#define CONFIG_SPL_LOAD_FIT_APPLY_OVERLAY_BUF_SZ (64 * 1024)
  25#endif
  26
  27#ifndef CONFIG_SYS_BOOTM_LEN
  28#define CONFIG_SYS_BOOTM_LEN    (64 << 20)
  29#endif
  30
  31struct spl_fit_info {
  32        const void *fit;        /* Pointer to a valid FIT blob */
  33        size_t ext_data_offset; /* Offset to FIT external data (end of FIT) */
  34        int images_node;        /* FDT offset to "/images" node */
  35        int conf_node;          /* FDT offset to selected configuration node */
  36};
  37
  38__weak void board_spl_fit_post_load(const void *fit)
  39{
  40}
  41
  42__weak ulong board_spl_fit_size_align(ulong size)
  43{
  44        return size;
  45}
  46
  47static int find_node_from_desc(const void *fit, int node, const char *str)
  48{
  49        int child;
  50
  51        if (node < 0)
  52                return -EINVAL;
  53
  54        /* iterate the FIT nodes and find a matching description */
  55        for (child = fdt_first_subnode(fit, node); child >= 0;
  56             child = fdt_next_subnode(fit, child)) {
  57                int len;
  58                const char *desc = fdt_getprop(fit, child, "description", &len);
  59
  60                if (!desc)
  61                        continue;
  62
  63                if (!strcmp(desc, str))
  64                        return child;
  65        }
  66
  67        return -ENOENT;
  68}
  69
  70/**
  71 * spl_fit_get_image_name(): By using the matching configuration subnode,
  72 * retrieve the name of an image, specified by a property name and an index
  73 * into that.
  74 * @fit:        Pointer to the FDT blob.
  75 * @images:     Offset of the /images subnode.
  76 * @type:       Name of the property within the configuration subnode.
  77 * @index:      Index into the list of strings in this property.
  78 * @outname:    Name of the image
  79 *
  80 * Return:      0 on success, or a negative error number
  81 */
  82static int spl_fit_get_image_name(const struct spl_fit_info *ctx,
  83                                  const char *type, int index,
  84                                  const char **outname)
  85{
  86        struct udevice *sysinfo;
  87        const char *name, *str;
  88        __maybe_unused int node;
  89        int len, i;
  90        bool found = true;
  91
  92        name = fdt_getprop(ctx->fit, ctx->conf_node, type, &len);
  93        if (!name) {
  94                debug("cannot find property '%s': %d\n", type, len);
  95                return -EINVAL;
  96        }
  97
  98        str = name;
  99        for (i = 0; i < index; i++) {
 100                str = strchr(str, '\0') + 1;
 101                if (!str || (str - name >= len)) {
 102                        found = false;
 103                        break;
 104                }
 105        }
 106
 107        if (!found && CONFIG_IS_ENABLED(SYSINFO) && !sysinfo_get(&sysinfo)) {
 108                int rc;
 109                /*
 110                 * no string in the property for this index. Check if the
 111                 * sysinfo-level code can supply one.
 112                 */
 113                rc = sysinfo_detect(sysinfo);
 114                if (rc)
 115                        return rc;
 116
 117                rc = sysinfo_get_fit_loadable(sysinfo, index - i - 1, type,
 118                                              &str);
 119                if (rc && rc != -ENOENT)
 120                        return rc;
 121
 122                if (!rc) {
 123                        /*
 124                         * The sysinfo provided a name for a loadable.
 125                         * Try to match it against the description properties
 126                         * first. If no matching node is found, use it as a
 127                         * node name.
 128                         */
 129                        int node;
 130                        int images = fdt_path_offset(ctx->fit, FIT_IMAGES_PATH);
 131
 132                        node = find_node_from_desc(ctx->fit, images, str);
 133                        if (node > 0)
 134                                str = fdt_get_name(ctx->fit, node, NULL);
 135
 136                        found = true;
 137                }
 138        }
 139
 140        if (!found) {
 141                debug("no string for index %d\n", index);
 142                return -E2BIG;
 143        }
 144
 145        *outname = str;
 146        return 0;
 147}
 148
 149/**
 150 * spl_fit_get_image_node(): By using the matching configuration subnode,
 151 * retrieve the name of an image, specified by a property name and an index
 152 * into that.
 153 * @fit:        Pointer to the FDT blob.
 154 * @images:     Offset of the /images subnode.
 155 * @type:       Name of the property within the configuration subnode.
 156 * @index:      Index into the list of strings in this property.
 157 *
 158 * Return:      the node offset of the respective image node or a negative
 159 *              error number.
 160 */
 161static int spl_fit_get_image_node(const struct spl_fit_info *ctx,
 162                                  const char *type, int index)
 163{
 164        const char *str;
 165        int err;
 166        int node;
 167
 168        err = spl_fit_get_image_name(ctx, type, index, &str);
 169        if (err)
 170                return err;
 171
 172        debug("%s: '%s'\n", type, str);
 173
 174        node = fdt_subnode_offset(ctx->fit, ctx->images_node, str);
 175        if (node < 0) {
 176                pr_err("cannot find image node '%s': %d\n", str, node);
 177                return -EINVAL;
 178        }
 179
 180        return node;
 181}
 182
 183static int get_aligned_image_offset(struct spl_load_info *info, int offset)
 184{
 185        /*
 186         * If it is a FS read, get the first address before offset which is
 187         * aligned to ARCH_DMA_MINALIGN. If it is raw read return the
 188         * block number to which offset belongs.
 189         */
 190        if (info->filename)
 191                return offset & ~(ARCH_DMA_MINALIGN - 1);
 192
 193        return offset / info->bl_len;
 194}
 195
 196static int get_aligned_image_overhead(struct spl_load_info *info, int offset)
 197{
 198        /*
 199         * If it is a FS read, get the difference between the offset and
 200         * the first address before offset which is aligned to
 201         * ARCH_DMA_MINALIGN. If it is raw read return the offset within the
 202         * block.
 203         */
 204        if (info->filename)
 205                return offset & (ARCH_DMA_MINALIGN - 1);
 206
 207        return offset % info->bl_len;
 208}
 209
 210static int get_aligned_image_size(struct spl_load_info *info, int data_size,
 211                                  int offset)
 212{
 213        data_size = data_size + get_aligned_image_overhead(info, offset);
 214
 215        if (info->filename)
 216                return data_size;
 217
 218        return (data_size + info->bl_len - 1) / info->bl_len;
 219}
 220
 221/**
 222 * spl_load_fit_image(): load the image described in a certain FIT node
 223 * @info:       points to information about the device to load data from
 224 * @sector:     the start sector of the FIT image on the device
 225 * @ctx:        points to the FIT context structure
 226 * @node:       offset of the DT node describing the image to load (relative
 227 *              to @fit)
 228 * @image_info: will be filled with information about the loaded image
 229 *              If the FIT node does not contain a "load" (address) property,
 230 *              the image gets loaded to the address pointed to by the
 231 *              load_addr member in this struct, if load_addr is not 0
 232 *
 233 * Return:      0 on success or a negative error number.
 234 */
 235static int spl_load_fit_image(struct spl_load_info *info, ulong sector,
 236                              const struct spl_fit_info *ctx, int node,
 237                              struct spl_image_info *image_info)
 238{
 239        int offset;
 240        size_t length;
 241        int len;
 242        ulong size;
 243        ulong load_addr;
 244        void *load_ptr;
 245        void *src;
 246        ulong overhead;
 247        int nr_sectors;
 248        uint8_t image_comp = -1, type = -1;
 249        const void *data;
 250        const void *fit = ctx->fit;
 251        bool external_data = false;
 252
 253        if (IS_ENABLED(CONFIG_SPL_FPGA) ||
 254            (IS_ENABLED(CONFIG_SPL_OS_BOOT) && IS_ENABLED(CONFIG_SPL_GZIP))) {
 255                if (fit_image_get_type(fit, node, &type))
 256                        puts("Cannot get image type.\n");
 257                else
 258                        debug("%s ", genimg_get_type_name(type));
 259        }
 260
 261        if (IS_ENABLED(CONFIG_SPL_GZIP)) {
 262                fit_image_get_comp(fit, node, &image_comp);
 263                debug("%s ", genimg_get_comp_name(image_comp));
 264        }
 265
 266        if (fit_image_get_load(fit, node, &load_addr)) {
 267                if (!image_info->load_addr) {
 268                        printf("Can't load %s: No load address and no buffer\n",
 269                               fit_get_name(fit, node, NULL));
 270                        return -ENOBUFS;
 271                }
 272                load_addr = image_info->load_addr;
 273        }
 274
 275        if (!fit_image_get_data_position(fit, node, &offset)) {
 276                external_data = true;
 277        } else if (!fit_image_get_data_offset(fit, node, &offset)) {
 278                offset += ctx->ext_data_offset;
 279                external_data = true;
 280        }
 281
 282        if (external_data) {
 283                void *src_ptr;
 284
 285                /* External data */
 286                if (fit_image_get_data_size(fit, node, &len))
 287                        return -ENOENT;
 288
 289                src_ptr = map_sysmem(ALIGN(load_addr, ARCH_DMA_MINALIGN), len);
 290                length = len;
 291
 292                overhead = get_aligned_image_overhead(info, offset);
 293                nr_sectors = get_aligned_image_size(info, length, offset);
 294
 295                if (info->read(info,
 296                               sector + get_aligned_image_offset(info, offset),
 297                               nr_sectors, src_ptr) != nr_sectors)
 298                        return -EIO;
 299
 300                debug("External data: dst=%p, offset=%x, size=%lx\n",
 301                      src_ptr, offset, (unsigned long)length);
 302                src = src_ptr + overhead;
 303        } else {
 304                /* Embedded data */
 305                if (fit_image_get_data(fit, node, &data, &length)) {
 306                        puts("Cannot get image data/size\n");
 307                        return -ENOENT;
 308                }
 309                debug("Embedded data: dst=%lx, size=%lx\n", load_addr,
 310                      (unsigned long)length);
 311                src = (void *)data;     /* cast away const */
 312        }
 313
 314        if (CONFIG_IS_ENABLED(FIT_SIGNATURE)) {
 315                printf("## Checking hash(es) for Image %s ... ",
 316                       fit_get_name(fit, node, NULL));
 317                if (!fit_image_verify_with_data(fit, node, src, length))
 318                        return -EPERM;
 319                puts("OK\n");
 320        }
 321
 322        if (CONFIG_IS_ENABLED(FIT_IMAGE_POST_PROCESS))
 323                board_fit_image_post_process(fit, node, &src, &length);
 324
 325        load_ptr = map_sysmem(load_addr, length);
 326        if (IS_ENABLED(CONFIG_SPL_GZIP) && image_comp == IH_COMP_GZIP) {
 327                size = length;
 328                if (gunzip(load_ptr, CONFIG_SYS_BOOTM_LEN, src, &size)) {
 329                        puts("Uncompressing error\n");
 330                        return -EIO;
 331                }
 332                length = size;
 333        } else {
 334                memcpy(load_ptr, src, length);
 335        }
 336
 337        if (image_info) {
 338                ulong entry_point;
 339
 340                image_info->load_addr = load_addr;
 341                image_info->size = length;
 342
 343                if (!fit_image_get_entry(fit, node, &entry_point))
 344                        image_info->entry_point = entry_point;
 345                else
 346                        image_info->entry_point = FDT_ERROR;
 347        }
 348
 349        return 0;
 350}
 351
 352static bool os_takes_devicetree(uint8_t os)
 353{
 354        switch (os) {
 355        case IH_OS_U_BOOT:
 356                return true;
 357        case IH_OS_LINUX:
 358                return IS_ENABLED(CONFIG_SPL_OS_BOOT);
 359        default:
 360                return false;
 361        }
 362}
 363
 364static int spl_fit_append_fdt(struct spl_image_info *spl_image,
 365                              struct spl_load_info *info, ulong sector,
 366                              const struct spl_fit_info *ctx)
 367{
 368        struct spl_image_info image_info;
 369        int node, ret = 0, index = 0;
 370
 371        /*
 372         * Use the address following the image as target address for the
 373         * device tree.
 374         */
 375        image_info.load_addr = spl_image->load_addr + spl_image->size;
 376
 377        /* Figure out which device tree the board wants to use */
 378        node = spl_fit_get_image_node(ctx, FIT_FDT_PROP, index++);
 379        if (node < 0) {
 380                debug("%s: cannot find FDT node\n", __func__);
 381
 382                /*
 383                 * U-Boot did not find a device tree inside the FIT image. Use
 384                 * the U-Boot device tree instead.
 385                 */
 386                if (gd->fdt_blob)
 387                        memcpy((void *)image_info.load_addr, gd->fdt_blob,
 388                               fdt_totalsize(gd->fdt_blob));
 389                else
 390                        return node;
 391        } else {
 392                ret = spl_load_fit_image(info, sector, ctx, node,
 393                                         &image_info);
 394                if (ret < 0)
 395                        return ret;
 396        }
 397
 398        /* Make the load-address of the FDT available for the SPL framework */
 399        spl_image->fdt_addr = map_sysmem(image_info.load_addr, 0);
 400        if (CONFIG_IS_ENABLED(FIT_IMAGE_TINY))
 401                return 0;
 402
 403        if (CONFIG_IS_ENABLED(LOAD_FIT_APPLY_OVERLAY)) {
 404                void *tmpbuffer = NULL;
 405
 406                for (; ; index++) {
 407                        node = spl_fit_get_image_node(ctx, FIT_FDT_PROP, index);
 408                        if (node == -E2BIG) {
 409                                debug("%s: No additional FDT node\n", __func__);
 410                                break;
 411                        } else if (node < 0) {
 412                                debug("%s: unable to find FDT node %d\n",
 413                                      __func__, index);
 414                                continue;
 415                        }
 416
 417                        if (!tmpbuffer) {
 418                                /*
 419                                 * allocate memory to store the DT overlay
 420                                 * before it is applied. It may not be used
 421                                 * depending on how the overlay is stored, so
 422                                 * don't fail yet if the allocation failed.
 423                                 */
 424                                tmpbuffer = malloc(CONFIG_SPL_LOAD_FIT_APPLY_OVERLAY_BUF_SZ);
 425                                if (!tmpbuffer)
 426                                        debug("%s: unable to allocate space for overlays\n",
 427                                              __func__);
 428                        }
 429                        image_info.load_addr = (ulong)tmpbuffer;
 430                        ret = spl_load_fit_image(info, sector, ctx,
 431                                                 node, &image_info);
 432                        if (ret < 0)
 433                                break;
 434
 435                        /* Make room in FDT for changes from the overlay */
 436                        ret = fdt_increase_size(spl_image->fdt_addr,
 437                                                image_info.size);
 438                        if (ret < 0)
 439                                break;
 440
 441                        ret = fdt_overlay_apply_verbose(spl_image->fdt_addr,
 442                                                        (void *)image_info.load_addr);
 443                        if (ret) {
 444                                pr_err("failed to apply DT overlay %s\n",
 445                                       fit_get_name(ctx->fit, node, NULL));
 446                                break;
 447                        }
 448
 449                        debug("%s: DT overlay %s applied\n", __func__,
 450                              fit_get_name(ctx->fit, node, NULL));
 451                }
 452                free(tmpbuffer);
 453                if (ret)
 454                        return ret;
 455        }
 456        /* Try to make space, so we can inject details on the loadables */
 457        ret = fdt_shrink_to_minimum(spl_image->fdt_addr, 8192);
 458        if (ret < 0)
 459                return ret;
 460
 461        return ret;
 462}
 463
 464static int spl_fit_record_loadable(const struct spl_fit_info *ctx, int index,
 465                                   void *blob, struct spl_image_info *image)
 466{
 467        int ret = 0;
 468        const char *name;
 469        int node;
 470
 471        if (CONFIG_IS_ENABLED(FIT_IMAGE_TINY))
 472                return 0;
 473
 474        ret = spl_fit_get_image_name(ctx, "loadables", index, &name);
 475        if (ret < 0)
 476                return ret;
 477
 478        node = spl_fit_get_image_node(ctx, "loadables", index);
 479
 480        ret = fdt_record_loadable(blob, index, name, image->load_addr,
 481                                  image->size, image->entry_point,
 482                                  fdt_getprop(ctx->fit, node, "type", NULL),
 483                                  fdt_getprop(ctx->fit, node, "os", NULL),
 484                                  fdt_getprop(ctx->fit, node, "arch", NULL));
 485        return ret;
 486}
 487
 488static int spl_fit_image_is_fpga(const void *fit, int node)
 489{
 490        const char *type;
 491
 492        if (!IS_ENABLED(CONFIG_SPL_FPGA))
 493                return 0;
 494
 495        type = fdt_getprop(fit, node, FIT_TYPE_PROP, NULL);
 496        if (!type)
 497                return 0;
 498
 499        return !strcmp(type, "fpga");
 500}
 501
 502static int spl_fit_image_get_os(const void *fit, int noffset, uint8_t *os)
 503{
 504        if (!CONFIG_IS_ENABLED(FIT_IMAGE_TINY) || CONFIG_IS_ENABLED(OS_BOOT))
 505                return fit_image_get_os(fit, noffset, os);
 506
 507        const char *name = fdt_getprop(fit, noffset, FIT_OS_PROP, NULL);
 508        if (!name)
 509                return -ENOENT;
 510
 511        /*
 512         * We don't care what the type of the image actually is,
 513         * only whether or not it is U-Boot. This saves some
 514         * space by omitting the large table of OS types.
 515         */
 516        if (!strcmp(name, "u-boot"))
 517                *os = IH_OS_U_BOOT;
 518        else
 519                *os = IH_OS_INVALID;
 520
 521        return 0;
 522}
 523
 524/*
 525 * The purpose of the FIT load buffer is to provide a memory location that is
 526 * independent of the load address of any FIT component.
 527 */
 528static void *spl_get_fit_load_buffer(size_t size)
 529{
 530        void *buf;
 531
 532        buf = malloc(size);
 533        if (!buf) {
 534                pr_err("Could not get FIT buffer of %lu bytes\n", (ulong)size);
 535                pr_err("\tcheck CONFIG_SYS_SPL_MALLOC_SIZE\n");
 536                buf = spl_get_load_buffer(0, size);
 537        }
 538        return buf;
 539}
 540
 541/*
 542 * Weak default function to allow customizing SPL fit loading for load-only
 543 * use cases by allowing to skip the parsing/processing of the FIT contents
 544 * (so that this can be done separately in a more customized fashion)
 545 */
 546__weak bool spl_load_simple_fit_skip_processing(void)
 547{
 548        return false;
 549}
 550
 551static void warn_deprecated(const char *msg)
 552{
 553        printf("DEPRECATED: %s\n", msg);
 554        printf("\tSee doc/uImage.FIT/source_file_format.txt\n");
 555}
 556
 557static int spl_fit_upload_fpga(struct spl_fit_info *ctx, int node,
 558                               struct spl_image_info *fpga_image)
 559{
 560        const char *compatible;
 561        int ret;
 562
 563        debug("FPGA bitstream at: %x, size: %x\n",
 564              (u32)fpga_image->load_addr, fpga_image->size);
 565
 566        compatible = fdt_getprop(ctx->fit, node, "compatible", NULL);
 567        if (!compatible)
 568                warn_deprecated("'fpga' image without 'compatible' property");
 569        else if (strcmp(compatible, "u-boot,fpga-legacy"))
 570                printf("Ignoring compatible = %s property\n", compatible);
 571
 572        ret = fpga_load(0, (void *)fpga_image->load_addr, fpga_image->size,
 573                        BIT_FULL);
 574        if (ret) {
 575                printf("%s: Cannot load the image to the FPGA\n", __func__);
 576                return ret;
 577        }
 578
 579        puts("FPGA image loaded from FIT\n");
 580
 581        return 0;
 582}
 583
 584static int spl_fit_load_fpga(struct spl_fit_info *ctx,
 585                             struct spl_load_info *info, ulong sector)
 586{
 587        int node, ret;
 588
 589        struct spl_image_info fpga_image = {
 590                .load_addr = 0,
 591        };
 592
 593        node = spl_fit_get_image_node(ctx, "fpga", 0);
 594        if (node < 0)
 595                return node;
 596
 597        warn_deprecated("'fpga' property in config node. Use 'loadables'");
 598
 599        /* Load the image and set up the fpga_image structure */
 600        ret = spl_load_fit_image(info, sector, ctx, node, &fpga_image);
 601        if (ret) {
 602                printf("%s: Cannot load the FPGA: %i\n", __func__, ret);
 603                return ret;
 604        }
 605
 606        return spl_fit_upload_fpga(ctx, node, &fpga_image);
 607}
 608
 609static int spl_simple_fit_read(struct spl_fit_info *ctx,
 610                               struct spl_load_info *info, ulong sector,
 611                               const void *fit_header)
 612{
 613        unsigned long count, size;
 614        int sectors;
 615        void *buf;
 616
 617        /*
 618         * For FIT with external data, figure out where the external images
 619         * start. This is the base for the data-offset properties in each
 620         * image.
 621         */
 622        size = ALIGN(fdt_totalsize(fit_header), 4);
 623        size = board_spl_fit_size_align(size);
 624        ctx->ext_data_offset = ALIGN(size, 4);
 625
 626        /*
 627         * So far we only have one block of data from the FIT. Read the entire
 628         * thing, including that first block.
 629         *
 630         * For FIT with data embedded, data is loaded as part of FIT image.
 631         * For FIT with external data, data is not loaded in this step.
 632         */
 633        sectors = get_aligned_image_size(info, size, 0);
 634        buf = spl_get_fit_load_buffer(sectors * info->bl_len);
 635
 636        count = info->read(info, sector, sectors, buf);
 637        ctx->fit = buf;
 638        debug("fit read sector %lx, sectors=%d, dst=%p, count=%lu, size=0x%lx\n",
 639              sector, sectors, buf, count, size);
 640
 641        return (count == 0) ? -EIO : 0;
 642}
 643
 644static int spl_simple_fit_parse(struct spl_fit_info *ctx)
 645{
 646        /* Find the correct subnode under "/configurations" */
 647        ctx->conf_node = fit_find_config_node(ctx->fit);
 648        if (ctx->conf_node < 0)
 649                return -EINVAL;
 650
 651        if (IS_ENABLED(CONFIG_SPL_FIT_SIGNATURE)) {
 652                printf("## Checking hash(es) for config %s ... ",
 653                       fit_get_name(ctx->fit, ctx->conf_node, NULL));
 654                if (fit_config_verify(ctx->fit, ctx->conf_node))
 655                        return -EPERM;
 656                puts("OK\n");
 657        }
 658
 659        /* find the node holding the images information */
 660        ctx->images_node = fdt_path_offset(ctx->fit, FIT_IMAGES_PATH);
 661        if (ctx->images_node < 0) {
 662                debug("%s: Cannot find /images node: %d\n", __func__,
 663                      ctx->images_node);
 664                return -EINVAL;
 665        }
 666
 667        return 0;
 668}
 669
 670int spl_load_simple_fit(struct spl_image_info *spl_image,
 671                        struct spl_load_info *info, ulong sector, void *fit)
 672{
 673        struct spl_image_info image_info;
 674        struct spl_fit_info ctx;
 675        int node = -1;
 676        int ret;
 677        int index = 0;
 678        int firmware_node;
 679
 680        ret = spl_simple_fit_read(&ctx, info, sector, fit);
 681        if (ret < 0)
 682                return ret;
 683
 684        /* skip further processing if requested to enable load-only use cases */
 685        if (spl_load_simple_fit_skip_processing())
 686                return 0;
 687
 688        ret = spl_simple_fit_parse(&ctx);
 689        if (ret < 0)
 690                return ret;
 691
 692        if (IS_ENABLED(CONFIG_SPL_FPGA))
 693                spl_fit_load_fpga(&ctx, info, sector);
 694
 695        /*
 696         * Find the U-Boot image using the following search order:
 697         *   - start at 'firmware' (e.g. an ARM Trusted Firmware)
 698         *   - fall back 'kernel' (e.g. a Falcon-mode OS boot
 699         *   - fall back to using the first 'loadables' entry
 700         */
 701        if (node < 0)
 702                node = spl_fit_get_image_node(&ctx, FIT_FIRMWARE_PROP, 0);
 703
 704        if (node < 0 && IS_ENABLED(CONFIG_SPL_OS_BOOT))
 705                node = spl_fit_get_image_node(&ctx, FIT_KERNEL_PROP, 0);
 706
 707        if (node < 0) {
 708                debug("could not find firmware image, trying loadables...\n");
 709                node = spl_fit_get_image_node(&ctx, "loadables", 0);
 710                /*
 711                 * If we pick the U-Boot image from "loadables", start at
 712                 * the second image when later loading additional images.
 713                 */
 714                index = 1;
 715        }
 716        if (node < 0) {
 717                debug("%s: Cannot find u-boot image node: %d\n",
 718                      __func__, node);
 719                return -1;
 720        }
 721
 722        /* Load the image and set up the spl_image structure */
 723        ret = spl_load_fit_image(info, sector, &ctx, node, spl_image);
 724        if (ret)
 725                return ret;
 726
 727        /*
 728         * For backward compatibility, we treat the first node that is
 729         * as a U-Boot image, if no OS-type has been declared.
 730         */
 731        if (!spl_fit_image_get_os(ctx.fit, node, &spl_image->os))
 732                debug("Image OS is %s\n", genimg_get_os_name(spl_image->os));
 733        else if (!IS_ENABLED(CONFIG_SPL_OS_BOOT))
 734                spl_image->os = IH_OS_U_BOOT;
 735
 736        /*
 737         * Booting a next-stage U-Boot may require us to append the FDT.
 738         * We allow this to fail, as the U-Boot image might embed its FDT.
 739         */
 740        if (os_takes_devicetree(spl_image->os)) {
 741                ret = spl_fit_append_fdt(spl_image, info, sector, &ctx);
 742                if (ret < 0 && spl_image->os != IH_OS_U_BOOT)
 743                        return ret;
 744        }
 745
 746        firmware_node = node;
 747        /* Now check if there are more images for us to load */
 748        for (; ; index++) {
 749                uint8_t os_type = IH_OS_INVALID;
 750
 751                node = spl_fit_get_image_node(&ctx, "loadables", index);
 752                if (node < 0)
 753                        break;
 754
 755                /*
 756                 * if the firmware is also a loadable, skip it because
 757                 * it already has been loaded. This is typically the case with
 758                 * u-boot.img generated by mkimage.
 759                 */
 760                if (firmware_node == node)
 761                        continue;
 762
 763                image_info.load_addr = 0;
 764                ret = spl_load_fit_image(info, sector, &ctx, node, &image_info);
 765                if (ret < 0) {
 766                        printf("%s: can't load image loadables index %d (ret = %d)\n",
 767                               __func__, index, ret);
 768                        return ret;
 769                }
 770
 771                if (spl_fit_image_is_fpga(ctx.fit, node))
 772                        spl_fit_upload_fpga(&ctx, node, &image_info);
 773
 774                if (!spl_fit_image_get_os(ctx.fit, node, &os_type))
 775                        debug("Loadable is %s\n", genimg_get_os_name(os_type));
 776
 777                if (os_takes_devicetree(os_type)) {
 778                        spl_fit_append_fdt(&image_info, info, sector, &ctx);
 779                        spl_image->fdt_addr = image_info.fdt_addr;
 780                }
 781
 782                /*
 783                 * If the "firmware" image did not provide an entry point,
 784                 * use the first valid entry point from the loadables.
 785                 */
 786                if (spl_image->entry_point == FDT_ERROR &&
 787                    image_info.entry_point != FDT_ERROR)
 788                        spl_image->entry_point = image_info.entry_point;
 789
 790                /* Record our loadables into the FDT */
 791                if (spl_image->fdt_addr)
 792                        spl_fit_record_loadable(&ctx, index,
 793                                                spl_image->fdt_addr,
 794                                                &image_info);
 795        }
 796
 797        /*
 798         * If a platform does not provide CONFIG_SYS_UBOOT_START, U-Boot's
 799         * Makefile will set it to 0 and it will end up as the entry point
 800         * here. What it actually means is: use the load address.
 801         */
 802        if (spl_image->entry_point == FDT_ERROR || spl_image->entry_point == 0)
 803                spl_image->entry_point = spl_image->load_addr;
 804
 805        spl_image->flags |= SPL_FIT_FOUND;
 806
 807        if (IS_ENABLED(CONFIG_IMX_HAB))
 808                board_spl_fit_post_load(ctx.fit);
 809
 810        return 0;
 811}
 812