text: // SPDX-License-Identifier: GPL-2.0+
  /*
   * Copyright (c) 2013, Google Inc.
   *
   * (C) Copyright 2008 Semihalf
   *
   * (C) Copyright 2000-2006
   * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   */
  
  #ifdef USE_HOSTCC
  #include "mkimage.h"
  #include <time.h>
  #include <u-boot/crc.h>
  #else
  #include <linux/compiler.h>
  #include <linux/kconfig.h>
  #include <common.h>
  #include <errno.h>
  #include <mapmem.h>
  #include <asm/io.h>
  #include <malloc.h>
  DECLARE_GLOBAL_DATA_PTR;
  #endif /* !USE_HOSTCC*/
  
  #include <bootm.h>
  #include <image.h>
  #include <bootstage.h>
  #include <linux/kconfig.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));
  }
  
  /**
   * fit_get_subimage_count - get component (sub-image) count
   * @fit: pointer to the FIT format image header
   * @images_noffset: offset of images node
   *
   * returns:
   *     number of image components
   */
  int fit_get_subimage_count(const void *fit, int images_noffset)
  {
  	int noffset;
  	int ndepth;
  	int count = 0;
  
  	/* 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) {
  			count++;
  		}
  	}
  
  	return count;
  }
  
  #if !defined(CONFIG_SPL_BUILD) || defined(CONFIG_SPL_FIT_PRINT)
  /**
   * 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 properties 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;
  	const char *padding;
  	bool 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, FIT_KEY_HINT, NULL);
  	required = fdt_getprop(fit, noffset, FIT_KEY_REQUIRED, NULL) != NULL;
  	if (keyname)
  		printf(":%s", keyname);
  	if (required)
  		printf(" (required)");
  	printf("\n");
  
  	padding = fdt_getprop(fit, noffset, "padding", NULL);
  	if (padding)
  		printf("%s  %s padding: %s\n", p, type, padding);
  
  	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 properties 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_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 properties for the processed
   * configuration node.
   *
   * returns:
   *     no returned results
   */
  static void fit_conf_print(const void *fit, int noffset, const char *p)
  {
  	char *desc;
  	const char *uname;
  	int ret;
  	int fdt_index, loadables_index;
  	int ndepth;
  
  	/* Mandatory properties */
  	ret = fit_get_desc(fit, noffset, &desc);
  	printf("%s  Description:  ", p);
  	if (ret)
  		printf("unavailable\n");
  	else
  		printf("%s\n", desc);
  
  	uname = fdt_getprop(fit, noffset, FIT_KERNEL_PROP, NULL);
  	printf("%s  Kernel:       ", p);
  	if (!uname)
  		printf("unavailable\n");
  	else
  		printf("%s\n", uname);
  
  	/* Optional properties */
  	uname = fdt_getprop(fit, noffset, FIT_RAMDISK_PROP, NULL);
  	if (uname)
  		printf("%s  Init Ramdisk: %s\n", p, uname);
  
  	uname = fdt_getprop(fit, noffset, FIT_FIRMWARE_PROP, NULL);
  	if (uname)
  		printf("%s  Firmware:     %s\n", p, uname);
  
  	for (fdt_index = 0;
  	     uname = fdt_stringlist_get(fit, noffset, FIT_FDT_PROP,
  					fdt_index, NULL), uname;
  	     fdt_index++) {
  		if (fdt_index == 0)
  			printf("%s  FDT:          ", p);
  		else
  			printf("%s                ", p);
  		printf("%s\n", uname);
  	}
  
  	uname = fdt_getprop(fit, noffset, FIT_FPGA_PROP, NULL);
  	if (uname)
  		printf("%s  FPGA:         %s\n", p, uname);
  
  	/* Print out all of the specified loadables */
  	for (loadables_index = 0;
  	     uname = fdt_stringlist_get(fit, noffset, FIT_LOADABLE_PROP,
  					loadables_index, NULL), uname;
  	     loadables_index++) {
  		if (loadables_index == 0) {
  			printf("%s  Loadables:    ", p);
  		} else {
  			printf("%s                ", p);
  		}
  		printf("%s\n", uname);
  	}
  
  	/* Process all hash subnodes of the component configuration node */
  	for (ndepth = 0, noffset = fdt_next_node(fit, noffset, &ndepth);
  	     (noffset >= 0) && (ndepth > 0);
  	     noffset = fdt_next_node(fit, noffset, &ndepth)) {
  		if (ndepth == 1) {
  			/* Direct child node of the component configuration node */
  			fit_image_print_verification_data(fit, noffset, p);
  		}
  	}
  }
  
  /**
   * 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) followed 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 - 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 properties 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_and_size(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) ||
  	    (type == IH_TYPE_FIRMWARE)) {
  		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) ||
  	    (type == IH_TYPE_FPGA)) {
  		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);
  	}
  
  	/* optional load address for FDT */
  	if (type == IH_TYPE_FLATDT && !fit_image_get_load(fit, image_noffset, &load))
  		printf("%s  Load Address: 0x%08lx\n", p, load);
  
  	if ((type == IH_TYPE_KERNEL) || (type == IH_TYPE_STANDALONE) ||
  	    (type == IH_TYPE_RAMDISK)) {
  		ret = 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);
  		}
  	}
  }
  #else
  void fit_print_contents(const void *fit) { }
  void fit_image_print(const void *fit, int image_noffset, const char *p) { }
  #endif /* !defined(CONFIG_SPL_BUILD) || defined(CONFIG_SPL_FIT_PRINT) */
  
  /**
   * 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 description
   *
   * fit_get_desc() reads description property from a given node, if
   * description is found pointer to it is returned 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 property from given node, if timestamp
   * is found and has a correct size its value is returned 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 (within 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;
  }
  
  static int fit_image_get_address(const void *fit, int noffset, char *name,
  			  ulong *load)
  {
  	int len, cell_len;
  	const fdt32_t *cell;
  	uint64_t load64 = 0;
  
  	cell = fdt_getprop(fit, noffset, name, &len);
  	if (cell == NULL) {
  		fit_get_debug(fit, noffset, name, len);
  		return -1;
  	}
  
  	if (len > sizeof(ulong)) {
  		printf("Unsupported %s address size\n", name);
  		return -1;
  	}
  
  	cell_len = len >> 2;
  	/* Use load64 to avoid compiling warning for 32-bit target */
  	while (cell_len--) {
  		load64 = (load64 << 32) | uimage_to_cpu(*cell);
  		cell++;
  	}
  	*load = (ulong)load64;
  
  	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)
  {
  	return fit_image_get_address(fit, noffset, FIT_LOAD_PROP, load);
  }
  
  /**
   * 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)
  {
  	return fit_image_get_address(fit, noffset, FIT_ENTRY_PROP, entry);
  }
  
  /**
   * 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;
  }
  
  /**
   * Get 'data-offset' property from a given image node.
   *
   * @fit: pointer to the FIT image header
   * @noffset: component image node offset
   * @data_offset: holds the data-offset property
   *
   * returns:
   *     0, on success
   *     -ENOENT if the property could not be found
   */
  int fit_image_get_data_offset(const void *fit, int noffset, int *data_offset)
  {
  	const fdt32_t *val;
  
  	val = fdt_getprop(fit, noffset, FIT_DATA_OFFSET_PROP, NULL);
  	if (!val)
  		return -ENOENT;
  
  	*data_offset = fdt32_to_cpu(*val);
  
  	return 0;
  }
  
  /**
   * Get 'data-position' property from a given image node.
   *
   * @fit: pointer to the FIT image header
   * @noffset: component image node offset
   * @data_position: holds the data-position property
   *
   * returns:
   *     0, on success
   *     -ENOENT if the property could not be found
   */
  int fit_image_get_data_position(const void *fit, int noffset,
  				int *data_position)
  {
  	const fdt32_t *val;
  
  	val = fdt_getprop(fit, noffset, FIT_DATA_POSITION_PROP, NULL);
  	if (!val)
  		return -ENOENT;
  
  	*data_position = fdt32_to_cpu(*val);
  
  	return 0;
  }
  
  /**
   * Get 'data-size' property from a given image node.
   *
   * @fit: pointer to the FIT image header
   * @noffset: component image node offset
   * @data_size: holds the data-size property
   *
   * returns:
   *     0, on success
   *     -ENOENT if the property could not be found
   */
  int fit_image_get_data_size(const void *fit, int noffset, int *data_size)
  {
  	const fdt32_t *val;
  
  	val = fdt_getprop(fit, noffset, FIT_DATA_SIZE_PROP, NULL);
  	if (!val)
  		return -ENOENT;
  
  	*data_size = fdt32_to_cpu(*val);
  
  	return 0;
  }
  
  /**
   * Get 'data-size-unciphered' property from a given image node.
   *
   * @fit: pointer to the FIT image header
   * @noffset: component image node offset
   * @data_size: holds the data-size property
   *
   * returns:
   *     0, on success
   *     -ENOENT if the property could not be found
   */
  int fit_image_get_data_size_unciphered(const void *fit, int noffset,
  				       size_t *data_size)
  {
  	const fdt32_t *val;
  
  	val = fdt_getprop(fit, noffset, "data-size-unciphered", NULL);
  	if (!val)
  		return -ENOENT;
  
  	*data_size = (size_t)fdt32_to_cpu(*val);
  
  	return 0;
  }
  
  /**
   * fit_image_get_data_and_size - get data and its size including
   *				 both embedded and external data
   * @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_and_size() finds data and its size including
   * both embedded and external data. If the property is found
   * its data start address and size are returned to the caller.
   *
   * returns:
   *     0, on success
   *     otherwise, on failure
   */
  int fit_image_get_data_and_size(const void *fit, int noffset,
  				const void **data, size_t *size)
  {
  	bool external_data = false;
  	int offset;
  	int len;
  	int ret;
  
  	if (!fit_image_get_data_position(fit, noffset, &offset)) {
  		external_data = true;
  	} else if (!fit_image_get_data_offset(fit, noffset, &offset)) {
  		external_data = true;
  		/*
  		 * For FIT with external data, figure out where
  		 * the external images start. This is the base
  		 * for the data-offset properties in each image.
  		 */
  		offset += ((fdt_totalsize(fit) + 3) & ~3);
  	}
  
  	if (external_data) {
  		debug("External Data\n");
  		ret = fit_image_get_data_size(fit, noffset, &len);
  		*data = fit + offset;
  		*size = len;
  	} else {
  		ret = fit_image_get_data(fit, noffset, data, size);
  	}
  
  	return ret;
  }
  
  /**
   * 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_image_cipher_get_algo - get cipher algorithm name
   * @fit: pointer to the FIT format image header
   * @noffset: cipher node offset
   * @algo: double pointer to char, will hold pointer to the algorithm name
   *
   * fit_image_cipher_get_algo() finds cipher algorithm property in a given
   * cipher 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_cipher_get_algo(const void *fit, int noffset, char **algo)
  {
  	int len;
  
  	*algo = (char *)fdt_getprop(fit, noffset, FIT_ALGO_PROP, &len);
  	if (!*algo) {
  		fit_get_debug(fit, noffset, FIT_ALGO_PROP, len);
  		return -1;
  	}
  
  	return 0;
  }
  
  ulong fit_get_end(const void *fit)
  {
  	return map_to_sysmem((void *)(fit + fdt_totalsize(fit)));
  }
  
  /**
   * 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) {
  		debug("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) {
  #ifdef CONFIG_SHA1
  		sha1_csum_wd((unsigned char *)data, data_len,
  				(unsigned char *)value, CHUNKSZ_SHA1);
  		*value_len = 20;
  #else
  		debug("Unsupported hash sha1 alogrithm\n");
  		return -1;
  #endif
  	} else if (IMAGE_ENABLE_SHA256 && strcmp(algo, "sha256") == 0) {
  #ifdef CONFIG_SHA256
  		sha256_csum_wd((unsigned char *)data, data_len,
  			       (unsigned char *)value, CHUNKSZ_SHA256);
  		*value_len = SHA256_SUM_LEN;
  #else
  		debug("Unsupported hash sha256 alogrithm\n");
  		return -1;
  #endif
  	} else if (IMAGE_ENABLE_MD5 && strcmp(algo, "md5") == 0) {
  #ifdef CONFIG_MD5
  		md5_wd((unsigned char *)data, data_len, value, CHUNKSZ_MD5);
  		*value_len = 16;
  #else
  		debug("Unsupported hash mad5 alogrithm\n");
  		return -1;
  #endif
  	} 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;
  }
  
  int fit_image_verify_with_data(const void *fit, int image_noffset,
  			       const void *data, size_t size)
  {
  	int		noffset = 0;
  	char		*err_msg = "";
  	int verify_all = 1;
  	int ret;
  
  	/* 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 */
  	fdt_for_each_subnode(noffset, fit, image_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);
  
  			/*
  			 * Show an indication on failure, but do not return
  			 * an error. Only keys marked 'required' can cause
  			 * an image validation failure. See the call to
  			 * fit_image_verify_required_sigs() above.
  			 */
  			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_image_verify - verify data integrity
   * @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 char *name = fit_get_name(fit, image_noffset, NULL);
  	const void	*data;
  	size_t		size;
  	char		*err_msg = "";
  
  	if (strchr(name, '@')) {
  		/*
  		 * We don't support this since libfdt considers names with the
  		 * name root but different @ suffix to be equal
  		 */
  		err_msg = "Node name contains @";
  		goto err;
  	}
  	/* Get image data and data length */
  	if (fit_image_get_data_and_size(fit, image_noffset, &data, &size)) {
  		err_msg = "Can't get image data/size";
  		goto err;
  	}
  
  	return fit_image_verify_with_data(fit, image_noffset, data, size);
  
  err:
  	printf("error!\n%s in '%s' image node\n", err_msg,
  	       fit_get_name(fit, image_noffset, NULL));
  	return 0;
  }
  
  /**
   * fit_all_image_verify - verify data integrity 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));
  			count++;
  
  			if (!fit_image_verify(fit, noffset))
  				return 0;
  			printf("\n");
  		}
  	}
  	return 1;
  }
  
  #ifdef CONFIG_FIT_CIPHER
  static int fit_image_uncipher(const void *fit, int image_noffset,
  			      void **data, size_t *size)
  {
  	int cipher_noffset, ret;
  	void *dst;
  	size_t size_dst;
  
  	cipher_noffset = fdt_subnode_offset(fit, image_noffset,
  					    FIT_CIPHER_NODENAME);
  	if (cipher_noffset < 0)
  		return 0;
  
  	ret = fit_image_decrypt_data(fit, image_noffset, cipher_noffset,
  				     *data, *size, &dst, &size_dst);
  	if (ret)
  		goto out;
  
  	*data = dst;
  	*size = size_dst;
  
   out:
  	return ret;
  }
  #endif /* CONFIG_FIT_CIPHER */
  
  /**
   * 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;
  	int aarch32_support = 0;
  
  #ifdef CONFIG_ARM64_SUPPORT_AARCH32
  	aarch32_support = 1;
  #endif
  
  	if (fit_image_get_arch(fit, noffset, &image_arch))
  		return 0;
  	return (arch == image_arch) ||
  		(arch == IH_ARCH_I386 && image_arch == IH_ARCH_X86_64) ||
  		(arch == IH_ARCH_ARM64 && image_arch == IH_ARCH_ARM &&
  		 aarch32_support);
  }
  
  /**
   * 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);
  }
  
  /**
   * fdt_check_no_at() - Check for nodes whose names contain '@'
   *
   * This checks the parent node and all subnodes recursively
   *
   * @fit: FIT to check
   * @parent: Parent node to check
   * @return 0 if OK, -EADDRNOTAVAIL is a node has a name containing '@'
   */
  static int fdt_check_no_at(const void *fit, int parent)
  {
  	const char *name;
  	int node;
  	int ret;
  
  	name = fdt_get_name(fit, parent, NULL);
  	if (!name || strchr(name, '@'))
  		return -EADDRNOTAVAIL;
  
  	fdt_for_each_subnode(node, fit, parent) {
  		ret = fdt_check_no_at(fit, node);
  		if (ret)
  			return ret;
  	}
  
  	return 0;
  }
  
  /**
   * 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)
  {
  	int ret;
  	ulong size;
  
  	/* A FIT image must be a valid FDT */
  	ret = fdt_check_header(fit);
  	if (ret) {
  		debug("Wrong FIT format: not a flattened device tree (err=%d)\n",
  			  ret);
  		return -ENOEXEC;
  	}
  
  	if (CONFIG_IS_ENABLED(FIT_FULL_CHECK)) {
  		/*
  		 * If we are not given the size, make do wtih calculating it.
  		 * This is not as secure, so we should consider a flag to
  		 * control this.
  		 */
  		size = fdt_totalsize(fit);
  		ret = fdt_check_full(fit, size);
  		if (ret)
  			ret = -EINVAL;
  
  		/*
  		 * U-Boot stopped using unit addressed in 2017. Since libfdt
  		 * can match nodes ignoring any unit address, signature
  		 * verification can see the wrong node if one is inserted with
  		 * the same name as a valid node but with a unit address
  		 * attached. Protect against this by disallowing unit addresses.
  		 */
  		if (!ret && CONFIG_IS_ENABLED(FIT_SIGNATURE)) {
  			ret = fdt_check_no_at(fit, 0);
  
  			if (ret) {
  				debug("FIT check error %d\n", ret);
  				return ret;
  			}
  		}
  		if (ret) {
  			debug("FIT check error %d\n", ret);
  			return ret;
  		}
  	}
  
  	/* 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.
   *
   * As an optimization, the compatible property from the FDT's root node can be
   * copied into the configuration node in the FIT image. This is required to
   * match configurations with compressed FDTs.
   *
   * 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 *fdt;
  		const char *kfdt_name;
  		int kfdt_noffset, compat_noffset;
  		const char *cur_fdt_compat;
  		int len;
  		size_t sz;
  		int i;
  
  		if (ndepth > 1)
  			continue;
  
  		/* If there's a compat property in the config node, use that. */
  		if (fdt_getprop(fit, noffset, "compatible", NULL)) {
  			fdt = fit;		  /* search in FIT image */
  			compat_noffset = noffset; /* search under config node */
  		} else {	/* Otherwise extract it from the kernel FDT. */
  			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;
  			}
  
  			if (!fit_image_check_comp(fit, kfdt_noffset,
  						  IH_COMP_NONE)) {
  				debug("Can't extract compat from \"%s\" "
  				      "(compressed)\n", kfdt_name);
  				continue;
  			}
  
  			/* search in this config's kernel FDT */
  			if (fit_image_get_data(fit, kfdt_noffset, &fdt, &sz)) {
  				debug("Failed to get fdt \"%s\".\n", kfdt_name);
  				continue;
  			}
  
  			compat_noffset = 0;  /* search kFDT under root node */
  		}
  
  		len = fdt_compat_len;
  		cur_fdt_compat = fdt_compat;
  		/*
  		 * Look for a match for each U-Boot compatibility string in
  		 * turn in the compat string property.
  		 */
  		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(fdt, compat_noffset,
  						       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;
  }
  
  int fit_conf_get_node(const void *fit, const char *conf_uname)
  {
  	int noffset, confs_noffset;
  	int len;
  	const char *s;
  	char *conf_uname_copy = NULL;
  
  	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);
  	}
  
  	s = strchr(conf_uname, '#');
  	if (s) {
  		len = s - conf_uname;
  		conf_uname_copy = malloc(len + 1);
  		if (!conf_uname_copy) {
  			debug("Can't allocate uname copy: '%s'\n",
  					conf_uname);
  			return -ENOMEM;
  		}
  		memcpy(conf_uname_copy, conf_uname, len);
  		conf_uname_copy[len] = '\0';
  		conf_uname = conf_uname_copy;
  	}
  
  	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));
  	}
  
  	if (conf_uname_copy)
  		free(conf_uname_copy);
  
  	return noffset;
  }
  
  int fit_conf_get_prop_node_count(const void *fit, int noffset,
  		const char *prop_name)
  {
  	return fdt_stringlist_count(fit, noffset, prop_name);
  }
  
  int fit_conf_get_prop_node_index(const void *fit, int noffset,
  		const char *prop_name, int index)
  {
  	const char *uname;
  	int len;
  
  	/* get kernel image unit name from configuration kernel property */
  	uname = fdt_stringlist_get(fit, noffset, prop_name, index, &len);
  	if (uname == NULL)
  		return len;
  
  	return fit_image_get_node(fit, uname);
  }
  
  int fit_conf_get_prop_node(const void *fit, int noffset,
  		const char *prop_name)
  {
  	return fit_conf_get_prop_node_index(fit, noffset, prop_name, 0);
  }
  
  static 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 -EINVAL;
  	}
  
  	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 -ENOENT;
  	}
  
  	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 short 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;
  	case IH_TYPE_X86_SETUP:
  		return FIT_SETUP_PROP;
  	case IH_TYPE_LOADABLE:
  		return FIT_LOADABLE_PROP;
  	case IH_TYPE_FPGA:
  		return FIT_FPGA_PROP;
  	case IH_TYPE_STANDALONE:
  		return FIT_STANDALONE_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 char *fit_base_uname_config;
  	const void *fit;
  	void *buf;
  	void *loadbuf;
  	size_t size;
  	int type_ok, os_ok;
  	ulong load, load_end, data, len;
  	uint8_t os, comp;
  #ifndef USE_HOSTCC
  	uint8_t os_arch;
  #endif
  	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;
  	fit_base_uname_config = 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);
  	ret = fit_check_format(fit);
  	if (ret) {
  		printf("Bad FIT %s image format! (err=%d)\n", prop_name, ret);
  		if (CONFIG_IS_ENABLED(FIT_SIGNATURE) && ret == -EADDRNOTAVAIL)
  			printf("Signature checking prevents use of unit addresses (@) in nodes\n");
  		bootstage_error(bootstage_id + BOOTSTAGE_SUB_FORMAT);
  		return ret;
  	}
  	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_base_uname_config = fdt_get_name(fit, cfg_noffset, NULL);
  		printf("   Using '%s' configuration\n", fit_base_uname_config);
  		/* Remember this config */
  		if (image_type == IH_TYPE_KERNEL)
  			images->fit_uname_cfg = fit_base_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) {
  		printf("Could not find subimage node type '%s'\n", prop_name);
  		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);
  #if !defined(USE_HOSTCC) && !defined(CONFIG_SANDBOX)
  	if (!fit_image_check_target_arch(fit, noffset)) {
  		puts("Unsupported Architecture\n");
  		bootstage_error(bootstage_id + BOOTSTAGE_SUB_CHECK_ARCH);
  		return -ENOEXEC;
  	}
  #endif
  
  #ifndef USE_HOSTCC
  	fit_image_get_arch(fit, noffset, &os_arch);
  	images->os.arch = os_arch;
  #endif
  
  	bootstage_mark(bootstage_id + BOOTSTAGE_SUB_CHECK_ALL);
  	type_ok = fit_image_check_type(fit, noffset, image_type) ||
  		  fit_image_check_type(fit, noffset, IH_TYPE_FIRMWARE) ||
  		  (image_type == IH_TYPE_KERNEL &&
  		   fit_image_check_type(fit, noffset, IH_TYPE_KERNEL_NOLOAD));
  
  	os_ok = image_type == IH_TYPE_FLATDT ||
  		image_type == IH_TYPE_FPGA ||
  		fit_image_check_os(fit, noffset, IH_OS_LINUX) ||
  		fit_image_check_os(fit, noffset, IH_OS_U_BOOT) ||
  		fit_image_check_os(fit, noffset, IH_OS_OPENRTOS);
  
  	/*
  	 * If either of the checks fail, we should report an error, but
  	 * if the image type is coming from the "loadables" field, we
  	 * don't care what it is
  	 */
  	if ((!type_ok || !os_ok) && image_type != IH_TYPE_LOADABLE) {
  		fit_image_get_os(fit, noffset, &os);
  		printf("No %s %s %s Image\n",
  		       genimg_get_os_name(os),
  		       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_and_size(fit, noffset,
  					(const void **)&buf, &size)) {
  		printf("Could not find %s subimage data!\n", prop_name);
  		bootstage_error(bootstage_id + BOOTSTAGE_SUB_GET_DATA);
  		return -ENOENT;
  	}
  
  #ifdef CONFIG_FIT_CIPHER
  	/* Decrypt data before uncompress/move */
  	if (IMAGE_ENABLE_DECRYPT) {
  		puts("   Decrypting Data ... ");
  		if (fit_image_uncipher(fit, noffset, &buf, &size)) {
  			puts("Error\n");
  			return -EACCES;
  		}
  		puts("OK\n");
  	}
  #endif
  
  #if !defined(USE_HOSTCC) && defined(CONFIG_FIT_IMAGE_POST_PROCESS)
  	/* perform any post-processing on the image data */
  	board_fit_image_post_process(&buf, &size);
  #endif
  
  	len = (ulong)size;
  
  	bootstage_mark(bootstage_id + BOOTSTAGE_SUB_GET_DATA_OK);
  
  	data = map_to_sysmem(buf);
  	load = data;
  	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 if (load_op != FIT_LOAD_OPTIONAL_NON_ZERO || load) {
  		ulong image_start, image_end;
  
  		/*
  		 * 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);
  	} else {
  		load = data;	/* No load address specified */
  	}
  
  	comp = IH_COMP_NONE;
  	loadbuf = buf;
  	/* Kernel images get decompressed later in bootm_load_os(). */
  	if (!fit_image_get_comp(fit, noffset, &comp) &&
  	    comp != IH_COMP_NONE &&
  	    !(image_type == IH_TYPE_KERNEL ||
  	      image_type == IH_TYPE_KERNEL_NOLOAD ||
  	      image_type == IH_TYPE_RAMDISK)) {
  		ulong max_decomp_len = len * 20;
  		if (load == data) {
  			loadbuf = malloc(max_decomp_len);
  			load = map_to_sysmem(loadbuf);
  		} else {
  			loadbuf = map_sysmem(load, max_decomp_len);
  		}
  		if (image_decomp(comp, load, data, image_type,
  				loadbuf, buf, len, max_decomp_len, &load_end)) {
  			printf("Error decompressing %s\n", prop_name);
  
  			return -ENOEXEC;
  		}
  		len = load_end - load;
  	} else if (load != data) {
  		loadbuf = map_sysmem(load, len);
  		memcpy(loadbuf, buf, len);
  	}
  
  	if (image_type == IH_TYPE_RAMDISK && comp != IH_COMP_NONE)
  		puts("WARNING: 'compression' nodes for ramdisks are deprecated,"
  		     " please fix your .its file!\n");
  
  	/* verify that image data is a proper FDT blob */
  	if (image_type == IH_TYPE_FLATDT && fdt_check_header(loadbuf)) {
  		puts("Subimage data is not a FDT");
  		return -ENOEXEC;
  	}
  
  	bootstage_mark(bootstage_id + BOOTSTAGE_SUB_LOAD);
  
  	*datap = load;
  	*lenp = len;
  	if (fit_unamep)
  		*fit_unamep = (char *)fit_uname;
  	if (fit_uname_configp)
  		*fit_uname_configp = (char *)(fit_uname_config ? :
  					      fit_base_uname_config);
  
  	return noffset;
  }
  
  int boot_get_setup_fit(bootm_headers_t *images, uint8_t arch,
  			ulong *setup_start, ulong *setup_len)
  {
  	int noffset;
  	ulong addr;
  	ulong len;
  	int ret;
  
  	addr = map_to_sysmem(images->fit_hdr_os);
  	noffset = fit_get_node_from_config(images, FIT_SETUP_PROP, addr);
  	if (noffset < 0)
  		return noffset;
  
  	ret = fit_image_load(images, addr, NULL, NULL, arch,
  			     IH_TYPE_X86_SETUP, BOOTSTAGE_ID_FIT_SETUP_START,
  			     FIT_LOAD_REQUIRED, setup_start, &len);
  
  	return ret;
  }
  
  #ifndef USE_HOSTCC
  int boot_get_fdt_fit(bootm_headers_t *images, ulong addr,
  		   const char **fit_unamep, const char **fit_uname_configp,
  		   int arch, ulong *datap, ulong *lenp)
  {
  	int fdt_noffset, cfg_noffset, count;
  	const void *fit;
  	const char *fit_uname = NULL;
  	const char *fit_uname_config = NULL;
  	char *fit_uname_config_copy = NULL;
  	char *next_config = NULL;
  	ulong load, len;
  #ifdef CONFIG_OF_LIBFDT_OVERLAY
  	ulong image_start, image_end;
  	ulong ovload, ovlen;
  	const char *uconfig;
  	const char *uname;
  	void *base, *ov;
  	int i, err, noffset, ov_noffset;
  #endif
  
  	fit_uname = fit_unamep ? *fit_unamep : NULL;
  
  	if (fit_uname_configp && *fit_uname_configp) {
  		fit_uname_config_copy = strdup(*fit_uname_configp);
  		if (!fit_uname_config_copy)
  			return -ENOMEM;
  
  		next_config = strchr(fit_uname_config_copy, '#');
  		if (next_config)
  			*next_config++ = '\0';
  		if (next_config - 1 > fit_uname_config_copy)
  			fit_uname_config = fit_uname_config_copy;
  	}
  
  	fdt_noffset = fit_image_load(images,
  		addr, &fit_uname, &fit_uname_config,
  		arch, IH_TYPE_FLATDT,
  		BOOTSTAGE_ID_FIT_FDT_START,
  		FIT_LOAD_OPTIONAL, &load, &len);
  
  	if (fdt_noffset < 0)
  		goto out;
  
  	debug("fit_uname=%s, fit_uname_config=%s\n",
  			fit_uname ? fit_uname : "<NULL>",
  			fit_uname_config ? fit_uname_config : "<NULL>");
  
  	fit = map_sysmem(addr, 0);
  
  	cfg_noffset = fit_conf_get_node(fit, fit_uname_config);
  
  	/* single blob, or error just return as well */
  	count = fit_conf_get_prop_node_count(fit, cfg_noffset, FIT_FDT_PROP);
  	if (count <= 1 && !next_config)
  		goto out;
  
  	/* we need to apply overlays */
  
  #ifdef CONFIG_OF_LIBFDT_OVERLAY
  	image_start = addr;
  	image_end = addr + fit_get_size(fit);
  	/* verify that relocation took place by load address not being in fit */
  	if (load >= image_start && load < image_end) {
  		/* check is simplified; fit load checks for overlaps */
  		printf("Overlayed FDT requires relocation\n");
  		fdt_noffset = -EBADF;
  		goto out;
  	}
  
  	base = map_sysmem(load, len);
  
  	/* apply extra configs in FIT first, followed by args */
  	for (i = 1; ; i++) {
  		if (i < count) {
  			noffset = fit_conf_get_prop_node_index(fit, cfg_noffset,
  							       FIT_FDT_PROP, i);
  			uname = fit_get_name(fit, noffset, NULL);
  			uconfig = NULL;
  		} else {
  			if (!next_config)
  				break;
  			uconfig = next_config;
  			next_config = strchr(next_config, '#');
  			if (next_config)
  				*next_config++ = '\0';
  			uname = NULL;
  
  			/*
  			 * fit_image_load() would load the first FDT from the
  			 * extra config only when uconfig is specified.
  			 * Check if the extra config contains multiple FDTs and
  			 * if so, load them.
  			 */
  			cfg_noffset = fit_conf_get_node(fit, uconfig);
  
  			i = 0;
  			count = fit_conf_get_prop_node_count(fit, cfg_noffset,
  							     FIT_FDT_PROP);
  		}
  
  		debug("%d: using uname=%s uconfig=%s\n", i, uname, uconfig);
  
  		ov_noffset = fit_image_load(images,
  			addr, &uname, &uconfig,
  			arch, IH_TYPE_FLATDT,
  			BOOTSTAGE_ID_FIT_FDT_START,
  			FIT_LOAD_REQUIRED, &ovload, &ovlen);
  		if (ov_noffset < 0) {
  			printf("load of %s failed\n", uname);
  			continue;
  		}
  		debug("%s loaded at 0x%08lx len=0x%08lx\n",
  				uname, ovload, ovlen);
  		ov = map_sysmem(ovload, ovlen);
  
  		base = map_sysmem(load, len + ovlen);
  		err = fdt_open_into(base, base, len + ovlen);
  		if (err < 0) {
  			printf("failed on fdt_open_into\n");
  			fdt_noffset = err;
  			goto out;
  		}
  		/* the verbose method prints out messages on error */
  		err = fdt_overlay_apply_verbose(base, ov);
  		if (err < 0) {
  			fdt_noffset = err;
  			goto out;
  		}
  		fdt_pack(base);
  		len = fdt_totalsize(base);
  	}
  #else
  	printf("config with overlays but CONFIG_OF_LIBFDT_OVERLAY not set\n");
  	fdt_noffset = -EBADF;
  #endif
  
  out:
  	if (datap)
  		*datap = load;
  	if (lenp)
  		*lenp = len;
  	if (fit_unamep)
  		*fit_unamep = fit_uname;
  	if (fit_uname_configp)
  		*fit_uname_configp = fit_uname_config;
  
  	if (fit_uname_config_copy)
  		free(fit_uname_config_copy);
  	return fdt_noffset;
  }
  #endif
  