Merge branch 'master' of git://www.denx.de/git/u-boot-imx

[people/ms/u-boot.git] / common / image-fit.c

/*
 * Copyright (c) 2013, Google Inc.
 *
 * (C) Copyright 2008 Semihalf
 *
 * (C) Copyright 2000-2006
 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
 *
 * SPDX-License-Identifier:     GPL-2.0+
 */

#ifdef USE_HOSTCC
#include "mkimage.h"
#include <image.h>
#include <time.h>
#else
#include <common.h>
#include <errno.h>
#include <asm/io.h>
DECLARE_GLOBAL_DATA_PTR;
#endif /* !USE_HOSTCC*/

#include <bootstage.h>
#include <u-boot/crc.h>
#include <u-boot/md5.h>
#include <u-boot/sha1.h>
#include <u-boot/sha256.h>

/*****************************************************************************/
/* New uImage format routines */
/*****************************************************************************/
#ifndef USE_HOSTCC
static int fit_parse_spec(const char *spec, char sepc, ulong addr_curr,
                ulong *addr, const char **name)
{
        const char *sep;

        *addr = addr_curr;
        *name = NULL;

        sep = strchr(spec, sepc);
        if (sep) {
                if (sep - spec > 0)
                        *addr = simple_strtoul(spec, NULL, 16);

                *name = sep + 1;
                return 1;
        }

        return 0;
}

/**
 * fit_parse_conf - parse FIT configuration spec
 * @spec: input string, containing configuration spec
 * @add_curr: current image address (to be used as a possible default)
 * @addr: pointer to a ulong variable, will hold FIT image address of a given
 * configuration
 * @conf_name double pointer to a char, will hold pointer to a configuration
 * unit name
 *
 * fit_parse_conf() expects configuration spec in the form of [<addr>]#<conf>,
 * where <addr> is a FIT image address that contains configuration
 * with a <conf> unit name.
 *
 * Address part is optional, and if omitted default add_curr will
 * be used instead.
 *
 * returns:
 *     1 if spec is a valid configuration string,
 *     addr and conf_name are set accordingly
 *     0 otherwise
 */
int fit_parse_conf(const char *spec, ulong addr_curr,
                ulong *addr, const char **conf_name)
{
        return fit_parse_spec(spec, '#', addr_curr, addr, conf_name);
}

/**
 * fit_parse_subimage - parse FIT subimage spec
 * @spec: input string, containing subimage spec
 * @add_curr: current image address (to be used as a possible default)
 * @addr: pointer to a ulong variable, will hold FIT image address of a given
 * subimage
 * @image_name: double pointer to a char, will hold pointer to a subimage name
 *
 * fit_parse_subimage() expects subimage spec in the form of
 * [<addr>]:<subimage>, where <addr> is a FIT image address that contains
 * subimage with a <subimg> unit name.
 *
 * Address part is optional, and if omitted default add_curr will
 * be used instead.
 *
 * returns:
 *     1 if spec is a valid subimage string,
 *     addr and image_name are set accordingly
 *     0 otherwise
 */
int fit_parse_subimage(const char *spec, ulong addr_curr,
                ulong *addr, const char **image_name)
{
        return fit_parse_spec(spec, ':', addr_curr, addr, image_name);
}
#endif /* !USE_HOSTCC */

static void fit_get_debug(const void *fit, int noffset,
                char *prop_name, int err)
{
        debug("Can't get '%s' property from FIT 0x%08lx, node: offset %d, name %s (%s)\n",
              prop_name, (ulong)fit, noffset, fit_get_name(fit, noffset, NULL),
              fdt_strerror(err));
}

#if !defined(CONFIG_SPL_BUILD) || defined(CONFIG_FIT_SPL_PRINT)
/**
 * fit_print_contents - prints out the contents of the FIT format image
 * @fit: pointer to the FIT format image header
 * @p: pointer to prefix string
 *
 * fit_print_contents() formats a multi line FIT image contents description.
 * The routine prints out FIT image properties (root node level) follwed by
 * the details of each component image.
 *
 * returns:
 *     no returned results
 */
void fit_print_contents(const void *fit)
{
        char *desc;
        char *uname;
        int images_noffset;
        int confs_noffset;
        int noffset;
        int ndepth;
        int count = 0;
        int ret;
        const char *p;
        time_t timestamp;

        /* Indent string is defined in header image.h */
        p = IMAGE_INDENT_STRING;

        /* Root node properties */
        ret = fit_get_desc(fit, 0, &desc);
        printf("%sFIT description: ", p);
        if (ret)
                printf("unavailable\n");
        else
                printf("%s\n", desc);

        if (IMAGE_ENABLE_TIMESTAMP) {
                ret = fit_get_timestamp(fit, 0, &timestamp);
                printf("%sCreated:         ", p);
                if (ret)
                        printf("unavailable\n");
                else
                        genimg_print_time(timestamp);
        }

        /* Find images parent node offset */
        images_noffset = fdt_path_offset(fit, FIT_IMAGES_PATH);
        if (images_noffset < 0) {
                printf("Can't find images parent node '%s' (%s)\n",
                       FIT_IMAGES_PATH, fdt_strerror(images_noffset));
                return;
        }

        /* Process its subnodes, print out component images details */
        for (ndepth = 0, count = 0,
                noffset = fdt_next_node(fit, images_noffset, &ndepth);
             (noffset >= 0) && (ndepth > 0);
             noffset = fdt_next_node(fit, noffset, &ndepth)) {
                if (ndepth == 1) {
                        /*
                         * Direct child node of the images parent node,
                         * i.e. component image node.
                         */
                        printf("%s Image %u (%s)\n", p, count++,
                               fit_get_name(fit, noffset, NULL));

                        fit_image_print(fit, noffset, p);
                }
        }

        /* Find configurations parent node offset */
        confs_noffset = fdt_path_offset(fit, FIT_CONFS_PATH);
        if (confs_noffset < 0) {
                debug("Can't get configurations parent node '%s' (%s)\n",
                      FIT_CONFS_PATH, fdt_strerror(confs_noffset));
                return;
        }

        /* get default configuration unit name from default property */
        uname = (char *)fdt_getprop(fit, noffset, FIT_DEFAULT_PROP, NULL);
        if (uname)
                printf("%s Default Configuration: '%s'\n", p, uname);

        /* Process its subnodes, print out configurations details */
        for (ndepth = 0, count = 0,
                noffset = fdt_next_node(fit, confs_noffset, &ndepth);
             (noffset >= 0) && (ndepth > 0);
             noffset = fdt_next_node(fit, noffset, &ndepth)) {
                if (ndepth == 1) {
                        /*
                         * Direct child node of the configurations parent node,
                         * i.e. configuration node.
                         */
                        printf("%s Configuration %u (%s)\n", p, count++,
                               fit_get_name(fit, noffset, NULL));

                        fit_conf_print(fit, noffset, p);
                }
        }
}

/**
 * fit_image_print_data() - prints out the hash node details
 * @fit: pointer to the FIT format image header
 * @noffset: offset of the hash node
 * @p: pointer to prefix string
 * @type: Type of information to print ("hash" or "sign")
 *
 * fit_image_print_data() lists properies for the processed hash node
 *
 * This function avoid using puts() since it prints a newline on the host
 * but does not in U-Boot.
 *
 * returns:
 *     no returned results
 */
static void fit_image_print_data(const void *fit, int noffset, const char *p,
                                 const char *type)
{
        const char *keyname;
        uint8_t *value;
        int value_len;
        char *algo;
        int required;
        int ret, i;

        debug("%s  %s node:    '%s'\n", p, type,
              fit_get_name(fit, noffset, NULL));
        printf("%s  %s algo:    ", p, type);
        if (fit_image_hash_get_algo(fit, noffset, &algo)) {
                printf("invalid/unsupported\n");
                return;
        }
        printf("%s", algo);
        keyname = fdt_getprop(fit, noffset, "key-name-hint", NULL);
        required = fdt_getprop(fit, noffset, "required", NULL) != NULL;
        if (keyname)
                printf(":%s", keyname);
        if (required)
                printf(" (required)");
        printf("\n");

        ret = fit_image_hash_get_value(fit, noffset, &value,
                                        &value_len);
        printf("%s  %s value:   ", p, type);
        if (ret) {
                printf("unavailable\n");
        } else {
                for (i = 0; i < value_len; i++)
                        printf("%02x", value[i]);
                printf("\n");
        }

        debug("%s  %s len:     %d\n", p, type, value_len);

        /* Signatures have a time stamp */
        if (IMAGE_ENABLE_TIMESTAMP && keyname) {
                time_t timestamp;

                printf("%s  Timestamp:    ", p);
                if (fit_get_timestamp(fit, noffset, &timestamp))
                        printf("unavailable\n");
                else
                        genimg_print_time(timestamp);
        }
}

/**
 * fit_image_print_verification_data() - prints out the hash/signature details
 * @fit: pointer to the FIT format image header
 * @noffset: offset of the hash or signature node
 * @p: pointer to prefix string
 *
 * This lists properies for the processed hash node
 *
 * returns:
 *     no returned results
 */
static void fit_image_print_verification_data(const void *fit, int noffset,
                                       const char *p)
{
        const char *name;

        /*
         * Check subnode name, must be equal to "hash" or "signature".
         * Multiple hash/signature nodes require unique unit node
         * names, e.g. hash@1, hash@2, signature@1, signature@2, etc.
         */
        name = fit_get_name(fit, noffset, NULL);
        if (!strncmp(name, FIT_HASH_NODENAME, strlen(FIT_HASH_NODENAME))) {
                fit_image_print_data(fit, noffset, p, "Hash");
        } else if (!strncmp(name, FIT_SIG_NODENAME,
                                strlen(FIT_SIG_NODENAME))) {
                fit_image_print_data(fit, noffset, p, "Sign");
        }
}

/**
 * fit_image_print - prints out the FIT component image details
 * @fit: pointer to the FIT format image header
 * @image_noffset: offset of the component image node
 * @p: pointer to prefix string
 *
 * fit_image_print() lists all mandatory properies for the processed component
 * image. If present, hash nodes are printed out as well. Load
 * address for images of type firmware is also printed out. Since the load
 * address is not mandatory for firmware images, it will be output as
 * "unavailable" when not present.
 *
 * returns:
 *     no returned results
 */
void fit_image_print(const void *fit, int image_noffset, const char *p)
{
        char *desc;
        uint8_t type, arch, os, comp;
        size_t size;
        ulong load, entry;
        const void *data;
        int noffset;
        int ndepth;
        int ret;

        /* Mandatory properties */
        ret = fit_get_desc(fit, image_noffset, &desc);
        printf("%s  Description:  ", p);
        if (ret)
                printf("unavailable\n");
        else
                printf("%s\n", desc);

        if (IMAGE_ENABLE_TIMESTAMP) {
                time_t timestamp;

                ret = fit_get_timestamp(fit, 0, &timestamp);
                printf("%s  Created:      ", p);
                if (ret)
                        printf("unavailable\n");
                else
                        genimg_print_time(timestamp);
        }

        fit_image_get_type(fit, image_noffset, &type);
        printf("%s  Type:         %s\n", p, genimg_get_type_name(type));

        fit_image_get_comp(fit, image_noffset, &comp);
        printf("%s  Compression:  %s\n", p, genimg_get_comp_name(comp));

        ret = fit_image_get_data(fit, image_noffset, &data, &size);

#ifndef USE_HOSTCC
        printf("%s  Data Start:   ", p);
        if (ret) {
                printf("unavailable\n");
        } else {
                void *vdata = (void *)data;

                printf("0x%08lx\n", (ulong)map_to_sysmem(vdata));
        }
#endif

        printf("%s  Data Size:    ", p);
        if (ret)
                printf("unavailable\n");
        else
                genimg_print_size(size);

        /* Remaining, type dependent properties */
        if ((type == IH_TYPE_KERNEL) || (type == IH_TYPE_STANDALONE) ||
            (type == IH_TYPE_RAMDISK) || (type == IH_TYPE_FIRMWARE) ||
            (type == IH_TYPE_FLATDT)) {
                fit_image_get_arch(fit, image_noffset, &arch);
                printf("%s  Architecture: %s\n", p, genimg_get_arch_name(arch));
        }

        if ((type == IH_TYPE_KERNEL) || (type == IH_TYPE_RAMDISK)) {
                fit_image_get_os(fit, image_noffset, &os);
                printf("%s  OS:           %s\n", p, genimg_get_os_name(os));
        }

        if ((type == IH_TYPE_KERNEL) || (type == IH_TYPE_STANDALONE) ||
            (type == IH_TYPE_FIRMWARE) || (type == IH_TYPE_RAMDISK)) {
                ret = fit_image_get_load(fit, image_noffset, &load);
                printf("%s  Load Address: ", p);
                if (ret)
                        printf("unavailable\n");
                else
                        printf("0x%08lx\n", load);
        }

        if ((type == IH_TYPE_KERNEL) || (type == IH_TYPE_STANDALONE) ||
            (type == IH_TYPE_RAMDISK)) {
                fit_image_get_entry(fit, image_noffset, &entry);
                printf("%s  Entry Point:  ", p);
                if (ret)
                        printf("unavailable\n");
                else
                        printf("0x%08lx\n", entry);
        }

        /* Process all hash subnodes of the component image node */
        for (ndepth = 0, noffset = fdt_next_node(fit, image_noffset, &ndepth);
             (noffset >= 0) && (ndepth > 0);
             noffset = fdt_next_node(fit, noffset, &ndepth)) {
                if (ndepth == 1) {
                        /* Direct child node of the component image node */
                        fit_image_print_verification_data(fit, noffset, p);
                }
        }
}
#endif

/**
 * fit_get_desc - get node description property
 * @fit: pointer to the FIT format image header
 * @noffset: node offset
 * @desc: double pointer to the char, will hold pointer to the descrption
 *
 * fit_get_desc() reads description property from a given node, if
 * description is found pointer to it is returened in third call argument.
 *
 * returns:
 *     0, on success
 *     -1, on failure
 */
int fit_get_desc(const void *fit, int noffset, char **desc)
{
        int len;

        *desc = (char *)fdt_getprop(fit, noffset, FIT_DESC_PROP, &len);
        if (*desc == NULL) {
                fit_get_debug(fit, noffset, FIT_DESC_PROP, len);
                return -1;
        }

        return 0;
}

/**
 * fit_get_timestamp - get node timestamp property
 * @fit: pointer to the FIT format image header
 * @noffset: node offset
 * @timestamp: pointer to the time_t, will hold read timestamp
 *
 * fit_get_timestamp() reads timestamp poperty from given node, if timestamp
 * is found and has a correct size its value is retured in third call
 * argument.
 *
 * returns:
 *     0, on success
 *     -1, on property read failure
 *     -2, on wrong timestamp size
 */
int fit_get_timestamp(const void *fit, int noffset, time_t *timestamp)
{
        int len;
        const void *data;

        data = fdt_getprop(fit, noffset, FIT_TIMESTAMP_PROP, &len);
        if (data == NULL) {
                fit_get_debug(fit, noffset, FIT_TIMESTAMP_PROP, len);
                return -1;
        }
        if (len != sizeof(uint32_t)) {
                debug("FIT timestamp with incorrect size of (%u)\n", len);
                return -2;
        }

        *timestamp = uimage_to_cpu(*((uint32_t *)data));
        return 0;
}

/**
 * fit_image_get_node - get node offset for component image of a given unit name
 * @fit: pointer to the FIT format image header
 * @image_uname: component image node unit name
 *
 * fit_image_get_node() finds a component image (withing the '/images'
 * node) of a provided unit name. If image is found its node offset is
 * returned to the caller.
 *
 * returns:
 *     image node offset when found (>=0)
 *     negative number on failure (FDT_ERR_* code)
 */
int fit_image_get_node(const void *fit, const char *image_uname)
{
        int noffset, images_noffset;

        images_noffset = fdt_path_offset(fit, FIT_IMAGES_PATH);
        if (images_noffset < 0) {
                debug("Can't find images parent node '%s' (%s)\n",
                      FIT_IMAGES_PATH, fdt_strerror(images_noffset));
                return images_noffset;
        }

        noffset = fdt_subnode_offset(fit, images_noffset, image_uname);
        if (noffset < 0) {
                debug("Can't get node offset for image unit name: '%s' (%s)\n",
                      image_uname, fdt_strerror(noffset));
        }

        return noffset;
}

/**
 * fit_image_get_os - get os id for a given component image node
 * @fit: pointer to the FIT format image header
 * @noffset: component image node offset
 * @os: pointer to the uint8_t, will hold os numeric id
 *
 * fit_image_get_os() finds os property in a given component image node.
 * If the property is found, its (string) value is translated to the numeric
 * id which is returned to the caller.
 *
 * returns:
 *     0, on success
 *     -1, on failure
 */
int fit_image_get_os(const void *fit, int noffset, uint8_t *os)
{
        int len;
        const void *data;

        /* Get OS name from property data */
        data = fdt_getprop(fit, noffset, FIT_OS_PROP, &len);
        if (data == NULL) {
                fit_get_debug(fit, noffset, FIT_OS_PROP, len);
                *os = -1;
                return -1;
        }

        /* Translate OS name to id */
        *os = genimg_get_os_id(data);
        return 0;
}

/**
 * fit_image_get_arch - get arch id for a given component image node
 * @fit: pointer to the FIT format image header
 * @noffset: component image node offset
 * @arch: pointer to the uint8_t, will hold arch numeric id
 *
 * fit_image_get_arch() finds arch property in a given component image node.
 * If the property is found, its (string) value is translated to the numeric
 * id which is returned to the caller.
 *
 * returns:
 *     0, on success
 *     -1, on failure
 */
int fit_image_get_arch(const void *fit, int noffset, uint8_t *arch)
{
        int len;
        const void *data;

        /* Get architecture name from property data */
        data = fdt_getprop(fit, noffset, FIT_ARCH_PROP, &len);
        if (data == NULL) {
                fit_get_debug(fit, noffset, FIT_ARCH_PROP, len);
                *arch = -1;
                return -1;
        }

        /* Translate architecture name to id */
        *arch = genimg_get_arch_id(data);
        return 0;
}

/**
 * fit_image_get_type - get type id for a given component image node
 * @fit: pointer to the FIT format image header
 * @noffset: component image node offset
 * @type: pointer to the uint8_t, will hold type numeric id
 *
 * fit_image_get_type() finds type property in a given component image node.
 * If the property is found, its (string) value is translated to the numeric
 * id which is returned to the caller.
 *
 * returns:
 *     0, on success
 *     -1, on failure
 */
int fit_image_get_type(const void *fit, int noffset, uint8_t *type)
{
        int len;
        const void *data;

        /* Get image type name from property data */
        data = fdt_getprop(fit, noffset, FIT_TYPE_PROP, &len);
        if (data == NULL) {
                fit_get_debug(fit, noffset, FIT_TYPE_PROP, len);
                *type = -1;
                return -1;
        }

        /* Translate image type name to id */
        *type = genimg_get_type_id(data);
        return 0;
}

/**
 * fit_image_get_comp - get comp id for a given component image node
 * @fit: pointer to the FIT format image header
 * @noffset: component image node offset
 * @comp: pointer to the uint8_t, will hold comp numeric id
 *
 * fit_image_get_comp() finds comp property in a given component image node.
 * If the property is found, its (string) value is translated to the numeric
 * id which is returned to the caller.
 *
 * returns:
 *     0, on success
 *     -1, on failure
 */
int fit_image_get_comp(const void *fit, int noffset, uint8_t *comp)
{
        int len;
        const void *data;

        /* Get compression name from property data */
        data = fdt_getprop(fit, noffset, FIT_COMP_PROP, &len);
        if (data == NULL) {
                fit_get_debug(fit, noffset, FIT_COMP_PROP, len);
                *comp = -1;
                return -1;
        }

        /* Translate compression name to id */
        *comp = genimg_get_comp_id(data);
        return 0;
}

/**
 * fit_image_get_load() - get load addr property for given component image node
 * @fit: pointer to the FIT format image header
 * @noffset: component image node offset
 * @load: pointer to the uint32_t, will hold load address
 *
 * fit_image_get_load() finds load address property in a given component
 * image node. If the property is found, its value is returned to the caller.
 *
 * returns:
 *     0, on success
 *     -1, on failure
 */
int fit_image_get_load(const void *fit, int noffset, ulong *load)
{
        int len;
        const uint32_t *data;

        data = fdt_getprop(fit, noffset, FIT_LOAD_PROP, &len);
        if (data == NULL) {
                fit_get_debug(fit, noffset, FIT_LOAD_PROP, len);
                return -1;
        }

        *load = uimage_to_cpu(*data);
        return 0;
}

/**
 * fit_image_get_entry() - get entry point address property
 * @fit: pointer to the FIT format image header
 * @noffset: component image node offset
 * @entry: pointer to the uint32_t, will hold entry point address
 *
 * This gets the entry point address property for a given component image
 * node.
 *
 * fit_image_get_entry() finds entry point address property in a given
 * component image node.  If the property is found, its value is returned
 * to the caller.
 *
 * returns:
 *     0, on success
 *     -1, on failure
 */
int fit_image_get_entry(const void *fit, int noffset, ulong *entry)
{
        int len;
        const uint32_t *data;

        data = fdt_getprop(fit, noffset, FIT_ENTRY_PROP, &len);
        if (data == NULL) {
                fit_get_debug(fit, noffset, FIT_ENTRY_PROP, len);
                return -1;
        }

        *entry = uimage_to_cpu(*data);
        return 0;
}

/**
 * fit_image_get_data - get data property and its size for a given component image node
 * @fit: pointer to the FIT format image header
 * @noffset: component image node offset
 * @data: double pointer to void, will hold data property's data address
 * @size: pointer to size_t, will hold data property's data size
 *
 * fit_image_get_data() finds data property in a given component image node.
 * If the property is found its data start address and size are returned to
 * the caller.
 *
 * returns:
 *     0, on success
 *     -1, on failure
 */
int fit_image_get_data(const void *fit, int noffset,
                const void **data, size_t *size)
{
        int len;

        *data = fdt_getprop(fit, noffset, FIT_DATA_PROP, &len);
        if (*data == NULL) {
                fit_get_debug(fit, noffset, FIT_DATA_PROP, len);
                *size = 0;
                return -1;
        }

        *size = len;
        return 0;
}

/**
 * fit_image_hash_get_algo - get hash algorithm name
 * @fit: pointer to the FIT format image header
 * @noffset: hash node offset
 * @algo: double pointer to char, will hold pointer to the algorithm name
 *
 * fit_image_hash_get_algo() finds hash algorithm property in a given hash node.
 * If the property is found its data start address is returned to the caller.
 *
 * returns:
 *     0, on success
 *     -1, on failure
 */
int fit_image_hash_get_algo(const void *fit, int noffset, char **algo)
{
        int len;

        *algo = (char *)fdt_getprop(fit, noffset, FIT_ALGO_PROP, &len);
        if (*algo == NULL) {
                fit_get_debug(fit, noffset, FIT_ALGO_PROP, len);
                return -1;
        }

        return 0;
}

/**
 * fit_image_hash_get_value - get hash value and length
 * @fit: pointer to the FIT format image header
 * @noffset: hash node offset
 * @value: double pointer to uint8_t, will hold address of a hash value data
 * @value_len: pointer to an int, will hold hash data length
 *
 * fit_image_hash_get_value() finds hash value property in a given hash node.
 * If the property is found its data start address and size are returned to
 * the caller.
 *
 * returns:
 *     0, on success
 *     -1, on failure
 */
int fit_image_hash_get_value(const void *fit, int noffset, uint8_t **value,
                                int *value_len)
{
        int len;

        *value = (uint8_t *)fdt_getprop(fit, noffset, FIT_VALUE_PROP, &len);
        if (*value == NULL) {
                fit_get_debug(fit, noffset, FIT_VALUE_PROP, len);
                *value_len = 0;
                return -1;
        }

        *value_len = len;
        return 0;
}

/**
 * fit_image_hash_get_ignore - get hash ignore flag
 * @fit: pointer to the FIT format image header
 * @noffset: hash node offset
 * @ignore: pointer to an int, will hold hash ignore flag
 *
 * fit_image_hash_get_ignore() finds hash ignore property in a given hash node.
 * If the property is found and non-zero, the hash algorithm is not verified by
 * u-boot automatically.
 *
 * returns:
 *     0, on ignore not found
 *     value, on ignore found
 */
static int fit_image_hash_get_ignore(const void *fit, int noffset, int *ignore)
{
        int len;
        int *value;

        value = (int *)fdt_getprop(fit, noffset, FIT_IGNORE_PROP, &len);
        if (value == NULL || len != sizeof(int))
                *ignore = 0;
        else
                *ignore = *value;

        return 0;
}

/**
 * fit_set_timestamp - set node timestamp property
 * @fit: pointer to the FIT format image header
 * @noffset: node offset
 * @timestamp: timestamp value to be set
 *
 * fit_set_timestamp() attempts to set timestamp property in the requested
 * node and returns operation status to the caller.
 *
 * returns:
 *     0, on success
 *     -ENOSPC if no space in device tree, -1 for other error
 */
int fit_set_timestamp(void *fit, int noffset, time_t timestamp)
{
        uint32_t t;
        int ret;

        t = cpu_to_uimage(timestamp);
        ret = fdt_setprop(fit, noffset, FIT_TIMESTAMP_PROP, &t,
                                sizeof(uint32_t));
        if (ret) {
                printf("Can't set '%s' property for '%s' node (%s)\n",
                       FIT_TIMESTAMP_PROP, fit_get_name(fit, noffset, NULL),
                       fdt_strerror(ret));
                return ret == -FDT_ERR_NOSPACE ? -ENOSPC : -1;
        }

        return 0;
}

/**
 * calculate_hash - calculate and return hash for provided input data
 * @data: pointer to the input data
 * @data_len: data length
 * @algo: requested hash algorithm
 * @value: pointer to the char, will hold hash value data (caller must
 * allocate enough free space)
 * value_len: length of the calculated hash
 *
 * calculate_hash() computes input data hash according to the requested
 * algorithm.
 * Resulting hash value is placed in caller provided 'value' buffer, length
 * of the calculated hash is returned via value_len pointer argument.
 *
 * returns:
 *     0, on success
 *    -1, when algo is unsupported
 */
int calculate_hash(const void *data, int data_len, const char *algo,
                        uint8_t *value, int *value_len)
{
        if (IMAGE_ENABLE_CRC32 && strcmp(algo, "crc32") == 0) {
                *((uint32_t *)value) = crc32_wd(0, data, data_len,
                                                        CHUNKSZ_CRC32);
                *((uint32_t *)value) = cpu_to_uimage(*((uint32_t *)value));
                *value_len = 4;
        } else if (IMAGE_ENABLE_SHA1 && strcmp(algo, "sha1") == 0) {
                sha1_csum_wd((unsigned char *)data, data_len,
                             (unsigned char *)value, CHUNKSZ_SHA1);
                *value_len = 20;
        } else if (IMAGE_ENABLE_SHA256 && strcmp(algo, "sha256") == 0) {
                sha256_csum_wd((unsigned char *)data, data_len,
                               (unsigned char *)value, CHUNKSZ_SHA256);
                *value_len = SHA256_SUM_LEN;
        } else if (IMAGE_ENABLE_MD5 && strcmp(algo, "md5") == 0) {
                md5_wd((unsigned char *)data, data_len, value, CHUNKSZ_MD5);
                *value_len = 16;
        } else {
                debug("Unsupported hash alogrithm\n");
                return -1;
        }
        return 0;
}

static int fit_image_check_hash(const void *fit, int noffset, const void *data,
                                size_t size, char **err_msgp)
{
        uint8_t value[FIT_MAX_HASH_LEN];
        int value_len;
        char *algo;
        uint8_t *fit_value;
        int fit_value_len;
        int ignore;

        *err_msgp = NULL;

        if (fit_image_hash_get_algo(fit, noffset, &algo)) {
                *err_msgp = "Can't get hash algo property";
                return -1;
        }
        printf("%s", algo);

        if (IMAGE_ENABLE_IGNORE) {
                fit_image_hash_get_ignore(fit, noffset, &ignore);
                if (ignore) {
                        printf("-skipped ");
                        return 0;
                }
        }

        if (fit_image_hash_get_value(fit, noffset, &fit_value,
                                     &fit_value_len)) {
                *err_msgp = "Can't get hash value property";
                return -1;
        }

        if (calculate_hash(data, size, algo, value, &value_len)) {
                *err_msgp = "Unsupported hash algorithm";
                return -1;
        }

        if (value_len != fit_value_len) {
                *err_msgp = "Bad hash value len";
                return -1;
        } else if (memcmp(value, fit_value, value_len) != 0) {
                *err_msgp = "Bad hash value";
                return -1;
        }

        return 0;
}

/**
 * fit_image_verify - verify data intergity
 * @fit: pointer to the FIT format image header
 * @image_noffset: component image node offset
 *
 * fit_image_verify() goes over component image hash nodes,
 * re-calculates each data hash and compares with the value stored in hash
 * node.
 *
 * returns:
 *     1, if all hashes are valid
 *     0, otherwise (or on error)
 */
int fit_image_verify(const void *fit, int image_noffset)
{
        const void      *data;
        size_t          size;
        int             noffset = 0;
        char            *err_msg = "";
        int verify_all = 1;
        int ret;

        /* Get image data and data length */
        if (fit_image_get_data(fit, image_noffset, &data, &size)) {
                err_msg = "Can't get image data/size";
                goto error;
        }

        /* Verify all required signatures */
        if (IMAGE_ENABLE_VERIFY &&
            fit_image_verify_required_sigs(fit, image_noffset, data, size,
                                           gd_fdt_blob(), &verify_all)) {
                err_msg = "Unable to verify required signature";
                goto error;
        }

        /* Process all hash subnodes of the component image node */
        for (noffset = fdt_first_subnode(fit, image_noffset);
             noffset >= 0;
             noffset = fdt_next_subnode(fit, noffset)) {
                const char *name = fit_get_name(fit, noffset, NULL);

                /*
                 * Check subnode name, must be equal to "hash".
                 * Multiple hash nodes require unique unit node
                 * names, e.g. hash@1, hash@2, etc.
                 */
                if (!strncmp(name, FIT_HASH_NODENAME,
                             strlen(FIT_HASH_NODENAME))) {
                        if (fit_image_check_hash(fit, noffset, data, size,
                                                 &err_msg))
                                goto error;
                        puts("+ ");
                } else if (IMAGE_ENABLE_VERIFY && verify_all &&
                                !strncmp(name, FIT_SIG_NODENAME,
                                        strlen(FIT_SIG_NODENAME))) {
                        ret = fit_image_check_sig(fit, noffset, data,
                                                        size, -1, &err_msg);
                        if (ret)
                                puts("- ");
                        else
                                puts("+ ");
                }
        }

        if (noffset == -FDT_ERR_TRUNCATED || noffset == -FDT_ERR_BADSTRUCTURE) {
                err_msg = "Corrupted or truncated tree";
                goto error;
        }

        return 1;

error:
        printf(" error!\n%s for '%s' hash node in '%s' image node\n",
               err_msg, fit_get_name(fit, noffset, NULL),
               fit_get_name(fit, image_noffset, NULL));
        return 0;
}

/**
 * fit_all_image_verify - verify data intergity for all images
 * @fit: pointer to the FIT format image header
 *
 * fit_all_image_verify() goes over all images in the FIT and
 * for every images checks if all it's hashes are valid.
 *
 * returns:
 *     1, if all hashes of all images are valid
 *     0, otherwise (or on error)
 */
int fit_all_image_verify(const void *fit)
{
        int images_noffset;
        int noffset;
        int ndepth;
        int count;

        /* Find images parent node offset */
        images_noffset = fdt_path_offset(fit, FIT_IMAGES_PATH);
        if (images_noffset < 0) {
                printf("Can't find images parent node '%s' (%s)\n",
                       FIT_IMAGES_PATH, fdt_strerror(images_noffset));
                return 0;
        }

        /* Process all image subnodes, check hashes for each */
        printf("## Checking hash(es) for FIT Image at %08lx ...\n",
               (ulong)fit);
        for (ndepth = 0, count = 0,
             noffset = fdt_next_node(fit, images_noffset, &ndepth);
                        (noffset >= 0) && (ndepth > 0);
                        noffset = fdt_next_node(fit, noffset, &ndepth)) {
                if (ndepth == 1) {
                        /*
                         * Direct child node of the images parent node,
                         * i.e. component image node.
                         */
                        printf("   Hash(es) for Image %u (%s): ", count++,
                               fit_get_name(fit, noffset, NULL));

                        if (!fit_image_verify(fit, noffset))
                                return 0;
                        printf("\n");
                }
        }
        return 1;
}

/**
 * fit_image_check_os - check whether image node is of a given os type
 * @fit: pointer to the FIT format image header
 * @noffset: component image node offset
 * @os: requested image os
 *
 * fit_image_check_os() reads image os property and compares its numeric
 * id with the requested os. Comparison result is returned to the caller.
 *
 * returns:
 *     1 if image is of given os type
 *     0 otherwise (or on error)
 */
int fit_image_check_os(const void *fit, int noffset, uint8_t os)
{
        uint8_t image_os;

        if (fit_image_get_os(fit, noffset, &image_os))
                return 0;
        return (os == image_os);
}

/**
 * fit_image_check_arch - check whether image node is of a given arch
 * @fit: pointer to the FIT format image header
 * @noffset: component image node offset
 * @arch: requested imagearch
 *
 * fit_image_check_arch() reads image arch property and compares its numeric
 * id with the requested arch. Comparison result is returned to the caller.
 *
 * returns:
 *     1 if image is of given arch
 *     0 otherwise (or on error)
 */
int fit_image_check_arch(const void *fit, int noffset, uint8_t arch)
{
        uint8_t image_arch;

        if (fit_image_get_arch(fit, noffset, &image_arch))
                return 0;
        return (arch == image_arch);
}

/**
 * fit_image_check_type - check whether image node is of a given type
 * @fit: pointer to the FIT format image header
 * @noffset: component image node offset
 * @type: requested image type
 *
 * fit_image_check_type() reads image type property and compares its numeric
 * id with the requested type. Comparison result is returned to the caller.
 *
 * returns:
 *     1 if image is of given type
 *     0 otherwise (or on error)
 */
int fit_image_check_type(const void *fit, int noffset, uint8_t type)
{
        uint8_t image_type;

        if (fit_image_get_type(fit, noffset, &image_type))
                return 0;
        return (type == image_type);
}

/**
 * fit_image_check_comp - check whether image node uses given compression
 * @fit: pointer to the FIT format image header
 * @noffset: component image node offset
 * @comp: requested image compression type
 *
 * fit_image_check_comp() reads image compression property and compares its
 * numeric id with the requested compression type. Comparison result is
 * returned to the caller.
 *
 * returns:
 *     1 if image uses requested compression
 *     0 otherwise (or on error)
 */
int fit_image_check_comp(const void *fit, int noffset, uint8_t comp)
{
        uint8_t image_comp;

        if (fit_image_get_comp(fit, noffset, &image_comp))
                return 0;
        return (comp == image_comp);
}

/**
 * fit_check_format - sanity check FIT image format
 * @fit: pointer to the FIT format image header
 *
 * fit_check_format() runs a basic sanity FIT image verification.
 * Routine checks for mandatory properties, nodes, etc.
 *
 * returns:
 *     1, on success
 *     0, on failure
 */
int fit_check_format(const void *fit)
{
        /* mandatory / node 'description' property */
        if (fdt_getprop(fit, 0, FIT_DESC_PROP, NULL) == NULL) {
                debug("Wrong FIT format: no description\n");
                return 0;
        }

        if (IMAGE_ENABLE_TIMESTAMP) {
                /* mandatory / node 'timestamp' property */
                if (fdt_getprop(fit, 0, FIT_TIMESTAMP_PROP, NULL) == NULL) {
                        debug("Wrong FIT format: no timestamp\n");
                        return 0;
                }
        }

        /* mandatory subimages parent '/images' node */
        if (fdt_path_offset(fit, FIT_IMAGES_PATH) < 0) {
                debug("Wrong FIT format: no images parent node\n");
                return 0;
        }

        return 1;
}


/**
 * fit_conf_find_compat
 * @fit: pointer to the FIT format image header
 * @fdt: pointer to the device tree to compare against
 *
 * fit_conf_find_compat() attempts to find the configuration whose fdt is the
 * most compatible with the passed in device tree.
 *
 * Example:
 *
 * / o image-tree
 *   |-o images
 *   | |-o fdt@1
 *   | |-o fdt@2
 *   |
 *   |-o configurations
 *     |-o config@1
 *     | |-fdt = fdt@1
 *     |
 *     |-o config@2
 *       |-fdt = fdt@2
 *
 * / o U-Boot fdt
 *   |-compatible = "foo,bar", "bim,bam"
 *
 * / o kernel fdt1
 *   |-compatible = "foo,bar",
 *
 * / o kernel fdt2
 *   |-compatible = "bim,bam", "baz,biz"
 *
 * Configuration 1 would be picked because the first string in U-Boot's
 * compatible list, "foo,bar", matches a compatible string in the root of fdt1.
 * "bim,bam" in fdt2 matches the second string which isn't as good as fdt1.
 *
 * returns:
 *     offset to the configuration to use if one was found
 *     -1 otherwise
 */
int fit_conf_find_compat(const void *fit, const void *fdt)
{
        int ndepth = 0;
        int noffset, confs_noffset, images_noffset;
        const void *fdt_compat;
        int fdt_compat_len;
        int best_match_offset = 0;
        int best_match_pos = 0;

        confs_noffset = fdt_path_offset(fit, FIT_CONFS_PATH);
        images_noffset = fdt_path_offset(fit, FIT_IMAGES_PATH);
        if (confs_noffset < 0 || images_noffset < 0) {
                debug("Can't find configurations or images nodes.\n");
                return -1;
        }

        fdt_compat = fdt_getprop(fdt, 0, "compatible", &fdt_compat_len);
        if (!fdt_compat) {
                debug("Fdt for comparison has no \"compatible\" property.\n");
                return -1;
        }

        /*
         * Loop over the configurations in the FIT image.
         */
        for (noffset = fdt_next_node(fit, confs_noffset, &ndepth);
                        (noffset >= 0) && (ndepth > 0);
                        noffset = fdt_next_node(fit, noffset, &ndepth)) {
                const void *kfdt;
                const char *kfdt_name;
                int kfdt_noffset;
                const char *cur_fdt_compat;
                int len;
                size_t size;
                int i;

                if (ndepth > 1)
                        continue;

                kfdt_name = fdt_getprop(fit, noffset, "fdt", &len);
                if (!kfdt_name) {
                        debug("No fdt property found.\n");
                        continue;
                }
                kfdt_noffset = fdt_subnode_offset(fit, images_noffset,
                                                  kfdt_name);
                if (kfdt_noffset < 0) {
                        debug("No image node named \"%s\" found.\n",
                              kfdt_name);
                        continue;
                }
                /*
                 * Get a pointer to this configuration's fdt.
                 */
                if (fit_image_get_data(fit, kfdt_noffset, &kfdt, &size)) {
                        debug("Failed to get fdt \"%s\".\n", kfdt_name);
                        continue;
                }

                len = fdt_compat_len;
                cur_fdt_compat = fdt_compat;
                /*
                 * Look for a match for each U-Boot compatibility string in
                 * turn in this configuration's fdt.
                 */
                for (i = 0; len > 0 &&
                     (!best_match_offset || best_match_pos > i); i++) {
                        int cur_len = strlen(cur_fdt_compat) + 1;

                        if (!fdt_node_check_compatible(kfdt, 0,
                                                       cur_fdt_compat)) {
                                best_match_offset = noffset;
                                best_match_pos = i;
                                break;
                        }
                        len -= cur_len;
                        cur_fdt_compat += cur_len;
                }
        }
        if (!best_match_offset) {
                debug("No match found.\n");
                return -1;
        }

        return best_match_offset;
}

/**
 * fit_conf_get_node - get node offset for configuration of a given unit name
 * @fit: pointer to the FIT format image header
 * @conf_uname: configuration node unit name
 *
 * fit_conf_get_node() finds a configuration (withing the '/configurations'
 * parant node) of a provided unit name. If configuration is found its node
 * offset is returned to the caller.
 *
 * When NULL is provided in second argument fit_conf_get_node() will search
 * for a default configuration node instead. Default configuration node unit
 * name is retrieved from FIT_DEFAULT_PROP property of the '/configurations'
 * node.
 *
 * returns:
 *     configuration node offset when found (>=0)
 *     negative number on failure (FDT_ERR_* code)
 */
int fit_conf_get_node(const void *fit, const char *conf_uname)
{
        int noffset, confs_noffset;
        int len;

        confs_noffset = fdt_path_offset(fit, FIT_CONFS_PATH);
        if (confs_noffset < 0) {
                debug("Can't find configurations parent node '%s' (%s)\n",
                      FIT_CONFS_PATH, fdt_strerror(confs_noffset));
                return confs_noffset;
        }

        if (conf_uname == NULL) {
                /* get configuration unit name from the default property */
                debug("No configuration specified, trying default...\n");
                conf_uname = (char *)fdt_getprop(fit, confs_noffset,
                                                 FIT_DEFAULT_PROP, &len);
                if (conf_uname == NULL) {
                        fit_get_debug(fit, confs_noffset, FIT_DEFAULT_PROP,
                                      len);
                        return len;
                }
                debug("Found default configuration: '%s'\n", conf_uname);
        }

        noffset = fdt_subnode_offset(fit, confs_noffset, conf_uname);
        if (noffset < 0) {
                debug("Can't get node offset for configuration unit name: '%s' (%s)\n",
                      conf_uname, fdt_strerror(noffset));
        }

        return noffset;
}

int fit_conf_get_prop_node(const void *fit, int noffset,
                const char *prop_name)
{
        char *uname;
        int len;

        /* get kernel image unit name from configuration kernel property */
        uname = (char *)fdt_getprop(fit, noffset, prop_name, &len);
        if (uname == NULL)
                return len;

        return fit_image_get_node(fit, uname);
}

/**
 * fit_conf_print - prints out the FIT configuration details
 * @fit: pointer to the FIT format image header
 * @noffset: offset of the configuration node
 * @p: pointer to prefix string
 *
 * fit_conf_print() lists all mandatory properies for the processed
 * configuration node.
 *
 * returns:
 *     no returned results
 */
void fit_conf_print(const void *fit, int noffset, const char *p)
{
        char *desc;
        char *uname;
        int ret;

        /* Mandatory properties */
        ret = fit_get_desc(fit, noffset, &desc);
        printf("%s  Description:  ", p);
        if (ret)
                printf("unavailable\n");
        else
                printf("%s\n", desc);

        uname = (char *)fdt_getprop(fit, noffset, FIT_KERNEL_PROP, NULL);
        printf("%s  Kernel:       ", p);
        if (uname == NULL)
                printf("unavailable\n");
        else
                printf("%s\n", uname);

        /* Optional properties */
        uname = (char *)fdt_getprop(fit, noffset, FIT_RAMDISK_PROP, NULL);
        if (uname)
                printf("%s  Init Ramdisk: %s\n", p, uname);

        uname = (char *)fdt_getprop(fit, noffset, FIT_FDT_PROP, NULL);
        if (uname)
                printf("%s  FDT:          %s\n", p, uname);
}

int fit_image_select(const void *fit, int rd_noffset, int verify)
{
        fit_image_print(fit, rd_noffset, "   ");

        if (verify) {
                puts("   Verifying Hash Integrity ... ");
                if (!fit_image_verify(fit, rd_noffset)) {
                        puts("Bad Data Hash\n");
                        return -EACCES;
                }
                puts("OK\n");
        }

        return 0;
}

int fit_get_node_from_config(bootm_headers_t *images, const char *prop_name,
                        ulong addr)
{
        int cfg_noffset;
        void *fit_hdr;
        int noffset;

        debug("*  %s: using config '%s' from image at 0x%08lx\n",
              prop_name, images->fit_uname_cfg, addr);

        /* Check whether configuration has this property defined */
        fit_hdr = map_sysmem(addr, 0);
        cfg_noffset = fit_conf_get_node(fit_hdr, images->fit_uname_cfg);
        if (cfg_noffset < 0) {
                debug("*  %s: no such config\n", prop_name);
                return -ENOENT;
        }

        noffset = fit_conf_get_prop_node(fit_hdr, cfg_noffset, prop_name);
        if (noffset < 0) {
                debug("*  %s: no '%s' in config\n", prop_name, prop_name);
                return -ENOLINK;
        }

        return noffset;
}

/**
 * fit_get_image_type_property() - get property name for IH_TYPE_...
 *
 * @return the properly name where we expect to find the image in the
 * config node
 */
static const char *fit_get_image_type_property(int type)
{
        /*
         * This is sort-of available in the uimage_type[] table in image.c
         * but we don't have access to the sohrt name, and "fdt" is different
         * anyway. So let's just keep it here.
         */
        switch (type) {
        case IH_TYPE_FLATDT:
                return FIT_FDT_PROP;
        case IH_TYPE_KERNEL:
                return FIT_KERNEL_PROP;
        case IH_TYPE_RAMDISK:
                return FIT_RAMDISK_PROP;
        }

        return "unknown";
}

int fit_image_load(bootm_headers_t *images, ulong addr,
                   const char **fit_unamep, const char **fit_uname_configp,
                   int arch, int image_type, int bootstage_id,
                   enum fit_load_op load_op, ulong *datap, ulong *lenp)
{
        int cfg_noffset, noffset;
        const char *fit_uname;
        const char *fit_uname_config;
        const void *fit;
        const void *buf;
        size_t size;
        int type_ok, os_ok;
        ulong load, data, len;
        const char *prop_name;
        int ret;

        fit = map_sysmem(addr, 0);
        fit_uname = fit_unamep ? *fit_unamep : NULL;
        fit_uname_config = fit_uname_configp ? *fit_uname_configp : NULL;
        prop_name = fit_get_image_type_property(image_type);
        printf("## Loading %s from FIT Image at %08lx ...\n", prop_name, addr);

        bootstage_mark(bootstage_id + BOOTSTAGE_SUB_FORMAT);
        if (!fit_check_format(fit)) {
                printf("Bad FIT %s image format!\n", prop_name);
                bootstage_error(bootstage_id + BOOTSTAGE_SUB_FORMAT);
                return -ENOEXEC;
        }
        bootstage_mark(bootstage_id + BOOTSTAGE_SUB_FORMAT_OK);
        if (fit_uname) {
                /* get FIT component image node offset */
                bootstage_mark(bootstage_id + BOOTSTAGE_SUB_UNIT_NAME);
                noffset = fit_image_get_node(fit, fit_uname);
        } else {
                /*
                 * no image node unit name, try to get config
                 * node first. If config unit node name is NULL
                 * fit_conf_get_node() will try to find default config node
                 */
                bootstage_mark(bootstage_id + BOOTSTAGE_SUB_NO_UNIT_NAME);
                if (IMAGE_ENABLE_BEST_MATCH && !fit_uname_config) {
                        cfg_noffset = fit_conf_find_compat(fit, gd_fdt_blob());
                } else {
                        cfg_noffset = fit_conf_get_node(fit,
                                                        fit_uname_config);
                }
                if (cfg_noffset < 0) {
                        puts("Could not find configuration node\n");
                        bootstage_error(bootstage_id +
                                        BOOTSTAGE_SUB_NO_UNIT_NAME);
                        return -ENOENT;
                }
                fit_uname_config = fdt_get_name(fit, cfg_noffset, NULL);
                printf("   Using '%s' configuration\n", fit_uname_config);
                if (image_type == IH_TYPE_KERNEL) {
                        /* Remember (and possibly verify) this config */
                        images->fit_uname_cfg = fit_uname_config;
                        if (IMAGE_ENABLE_VERIFY && images->verify) {
                                puts("   Verifying Hash Integrity ... ");
                                if (fit_config_verify(fit, cfg_noffset)) {
                                        puts("Bad Data Hash\n");
                                        bootstage_error(bootstage_id +
                                                BOOTSTAGE_SUB_HASH);
                                        return -EACCES;
                                }
                                puts("OK\n");
                        }
                        bootstage_mark(BOOTSTAGE_ID_FIT_CONFIG);
                }

                noffset = fit_conf_get_prop_node(fit, cfg_noffset,
                                                 prop_name);
                fit_uname = fit_get_name(fit, noffset, NULL);
        }
        if (noffset < 0) {
                puts("Could not find subimage node\n");
                bootstage_error(bootstage_id + BOOTSTAGE_SUB_SUBNODE);
                return -ENOENT;
        }

        printf("   Trying '%s' %s subimage\n", fit_uname, prop_name);

        ret = fit_image_select(fit, noffset, images->verify);
        if (ret) {
                bootstage_error(bootstage_id + BOOTSTAGE_SUB_HASH);
                return ret;
        }

        bootstage_mark(bootstage_id + BOOTSTAGE_SUB_CHECK_ARCH);
#ifndef USE_HOSTCC
        if (!fit_image_check_target_arch(fit, noffset)) {
                puts("Unsupported Architecture\n");
                bootstage_error(bootstage_id + BOOTSTAGE_SUB_CHECK_ARCH);
                return -ENOEXEC;
        }
#endif
        if (image_type == IH_TYPE_FLATDT &&
            !fit_image_check_comp(fit, noffset, IH_COMP_NONE)) {
                puts("FDT image is compressed");
                return -EPROTONOSUPPORT;
        }

        bootstage_mark(bootstage_id + BOOTSTAGE_SUB_CHECK_ALL);
        type_ok = fit_image_check_type(fit, noffset, image_type) ||
                (image_type == IH_TYPE_KERNEL &&
                        fit_image_check_type(fit, noffset,
                                             IH_TYPE_KERNEL_NOLOAD));
        os_ok = image_type == IH_TYPE_FLATDT ||
                fit_image_check_os(fit, noffset, IH_OS_LINUX);
        if (!type_ok || !os_ok) {
                printf("No Linux %s %s Image\n", genimg_get_arch_name(arch),
                       genimg_get_type_name(image_type));
                bootstage_error(bootstage_id + BOOTSTAGE_SUB_CHECK_ALL);
                return -EIO;
        }

        bootstage_mark(bootstage_id + BOOTSTAGE_SUB_CHECK_ALL_OK);

        /* get image data address and length */
        if (fit_image_get_data(fit, noffset, &buf, &size)) {
                printf("Could not find %s subimage data!\n", prop_name);
                bootstage_error(bootstage_id + BOOTSTAGE_SUB_GET_DATA);
                return -ENOENT;
        }
        len = (ulong)size;

        /* verify that image data is a proper FDT blob */
        if (image_type == IH_TYPE_FLATDT && fdt_check_header(buf)) {
                puts("Subimage data is not a FDT");
                return -ENOEXEC;
        }

        bootstage_mark(bootstage_id + BOOTSTAGE_SUB_GET_DATA_OK);

        /*
         * Work-around for eldk-4.2 which gives this warning if we try to
         * cast in the unmap_sysmem() call:
         * warning: initialization discards qualifiers from pointer target type
         */
        {
                void *vbuf = (void *)buf;

                data = map_to_sysmem(vbuf);
        }

        if (load_op == FIT_LOAD_IGNORED) {
                /* Don't load */
        } else if (fit_image_get_load(fit, noffset, &load)) {
                if (load_op == FIT_LOAD_REQUIRED) {
                        printf("Can't get %s subimage load address!\n",
                               prop_name);
                        bootstage_error(bootstage_id + BOOTSTAGE_SUB_LOAD);
                        return -EBADF;
                }
        } else {
                ulong image_start, image_end;
                ulong load_end;
                void *dst;

                /*
                 * move image data to the load address,
                 * make sure we don't overwrite initial image
                 */
                image_start = addr;
                image_end = addr + fit_get_size(fit);

                load_end = load + len;
                if (image_type != IH_TYPE_KERNEL &&
                    load < image_end && load_end > image_start) {
                        printf("Error: %s overwritten\n", prop_name);
                        return -EXDEV;
                }

                printf("   Loading %s from 0x%08lx to 0x%08lx\n",
                       prop_name, data, load);

                dst = map_sysmem(load, len);
                memmove(dst, buf, len);
                data = load;
        }
        bootstage_mark(bootstage_id + BOOTSTAGE_SUB_LOAD);

        *datap = data;
        *lenp = len;
        if (fit_unamep)
                *fit_unamep = (char *)fit_uname;
        if (fit_uname_configp)
                *fit_uname_configp = (char *)fit_uname_config;

        return noffset;
}