// SPDX-License-Identifier: GPL-2.0+

  /*
   * Copyright (c) 2011 Sebastian Andrzej Siewior <bigeasy@linutronix.de>

   *
   * Copyright (C) 2015-2016 Freescale Semiconductor, Inc.
   * Copyright 2017 NXP

   */
  
  #include <common.h>

  #include <env.h>

  #include <image.h>

  #include <image-android-dt.h>

  #include <android_image.h>

  #include <malloc.h>
  #include <errno.h>

  #include <asm/unaligned.h>

  #include <mapmem.h>

  #include <asm/bootm.h>
  #include <asm/mach-imx/boot_mode.h>
  #include <asm/arch/sys_proto.h>
  #include <fb_fsl.h>
  #include <asm/setup.h>
  #include <dm.h>

  #include <mmc.h>

  #define ANDROID_IMAGE_DEFAULT_KERNEL_ADDR	0x10008000

  static char andr_tmp_str[ANDR_BOOT_ARGS_SIZE + 1];

  static ulong android_image_get_kernel_addr(const struct andr_img_hdr *hdr)
  {
  	/*
  	 * All the Android tools that generate a boot.img use this
  	 * address as the default.
  	 *
  	 * Even though it doesn't really make a lot of sense, and it
  	 * might be valid on some platforms, we treat that adress as
  	 * the default value for this field, and try to execute the
  	 * kernel in place in such a case.
  	 *
  	 * Otherwise, we will return the actual value set by the user.
  	 */
  	if (hdr->kernel_addr == ANDROID_IMAGE_DEFAULT_KERNEL_ADDR)
  		return (ulong)hdr + hdr->page_size;
  
  	return hdr->kernel_addr;
  }

  /**
   * android_image_get_kernel() - processes kernel part of Android boot images
   * @hdr:	Pointer to image header, which is at the start
   *			of the image.
   * @verify:	Checksum verification flag. Currently unimplemented.
   * @os_data:	Pointer to a ulong variable, will hold os data start
   *			address.
   * @os_len:	Pointer to a ulong variable, will hold os data length.
   *
   * This function returns the os image's start address and length. Also,
   * it appends the kernel command line to the bootargs env variable.
   *
   * Return: Zero, os start address and length on success,
   *		otherwise on failure.
   */

  int android_image_get_kernel(const struct andr_img_hdr *hdr, int verify,
  			     ulong *os_data, ulong *os_len)
  {

  	extern boot_metric metrics;

  	u32 kernel_addr = android_image_get_kernel_addr(hdr);

  	const struct image_header *ihdr = (const struct image_header *)
  		((uintptr_t)hdr + hdr->page_size);

  	/*
  	 * Not all Android tools use the id field for signing the image with
  	 * sha1 (or anything) so we don't check it. It is not obvious that the
  	 * string is null terminated so we take care of this.
  	 */
  	strncpy(andr_tmp_str, hdr->name, ANDR_BOOT_NAME_SIZE);
  	andr_tmp_str[ANDR_BOOT_NAME_SIZE] = '\0';
  	if (strlen(andr_tmp_str))
  		printf("Android's image name: %s
  ", andr_tmp_str);
  
  	printf("Kernel load addr 0x%08x size %u KiB
  ",

  	       kernel_addr, DIV_ROUND_UP(hdr->kernel_size, 1024));

  	char newbootargs[512] = {0};
  	char commandline[2048] = {0};
  	int offset;
  	char *bootargs = env_get("bootargs");
  
  	if (bootargs) {
  		if (strlen(bootargs) + 1 > sizeof(commandline)) {
  			printf("bootargs is too long!
  ");
  			return -1;
  		}
  		else
  			strncpy(commandline, bootargs, sizeof(commandline) - 1);
  	} else {
  		offset = fdt_path_offset(gd->fdt_blob, "/chosen");
  		if (offset > 0) {
  			bootargs = (char *)fdt_getprop(gd->fdt_blob, offset,
  							"bootargs", NULL);
  			if (bootargs)
  				sprintf(commandline, "%s ", bootargs);
  		}
  
  		if (*hdr->cmdline) {
  			if (strlen(hdr->cmdline) + 1 >
  				sizeof(commandline) - strlen(commandline)) {
  				printf("cmdline in bootimg is too long!
  ");
  				return -1;
  			}
  			else
  				strncat(commandline, hdr->cmdline, sizeof(commandline) - strlen(commandline));
  		}

  	}

  	/* Add 'bootargs_ram_capacity' to hold the parameters based on different ram capacity */
  	char *bootargs_ram_capacity = env_get("bootargs_ram_capacity");
  	if (bootargs_ram_capacity) {
  		strncat(commandline, " ", sizeof(commandline) - strlen(commandline));
  		strncat(commandline, bootargs_ram_capacity,
  			sizeof(commandline) - strlen(commandline));
  	}
  
  #ifdef CONFIG_SERIAL_TAG
  	struct tag_serialnr serialnr;
  	get_board_serial(&serialnr);
  
  	sprintf(newbootargs,
  					" androidboot.serialno=%08x%08x",
  					serialnr.high,
  					serialnr.low);
  	strncat(commandline, newbootargs, sizeof(commandline) - strlen(commandline));

  	if (serialnr.high + serialnr.low != 0) {
  		char bd_addr[16]={0};
  		sprintf(bd_addr,
  			"%08x%08x",
  			serialnr.high,
  			serialnr.low);
  		sprintf(newbootargs,
  			" androidboot.btmacaddr=%c%c:%c%c:%c%c:%c%c:%c%c:%c%c",
  			bd_addr[0],bd_addr[1],bd_addr[2],bd_addr[3],bd_addr[4],bd_addr[5],
  			bd_addr[6],bd_addr[7],bd_addr[8],bd_addr[9],bd_addr[10],bd_addr[11]);
  		strncat(commandline, newbootargs, sizeof(commandline) - strlen(commandline));
  	}

  #endif

  	/* append soc type into bootargs */
  	char *soc_type = env_get("soc_type");
  	if (soc_type) {
  		sprintf(newbootargs,
  			" androidboot.soc_type=%s",
  			soc_type);
  		strncat(commandline, newbootargs, sizeof(commandline) - strlen(commandline));

  	}

  	sprintf(newbootargs,
  			" androidboot.boot_device_root=mmcblk%d", mmc_map_to_kernel_blk(mmc_get_env_dev()));
  	strncat(commandline, newbootargs, sizeof(commandline) - strlen(commandline));

  	/* boot metric variables */
  	metrics.ble_1 = get_timer(0);
  	sprintf(newbootargs,
  		" androidboot.boottime=1BLL:%d,1BLE:%d,KL:%d,KD:%d,AVB:%d,ODT:%d,SW:%d",
  		metrics.bll_1, metrics.ble_1, metrics.kl, metrics.kd, metrics.avb,
  		metrics.odt, metrics.sw);
  	strncat(commandline, newbootargs, sizeof(commandline) - strlen(commandline));
  
  #if defined(CONFIG_ARCH_MX6) || defined(CONFIG_ARCH_MX7) || \
  	defined(CONFIG_ARCH_MX7ULP) || defined(CONFIG_ARCH_IMX8M)
  	char cause[18];
  
  	memset(cause, '\0', sizeof(cause));
  	get_reboot_reason(cause);
  	if (strstr(cause, "POR"))
  		sprintf(newbootargs," androidboot.bootreason=cold,powerkey");
  	else if (strstr(cause, "WDOG") || strstr(cause, "WDG"))
  		sprintf(newbootargs," androidboot.bootreason=watchdog");
  	else
  		sprintf(newbootargs," androidboot.bootreason=reboot");
  #else
  	sprintf(newbootargs," androidboot.bootreason=reboot");
  #endif
  	strncat(commandline, newbootargs, sizeof(commandline) - strlen(commandline));
  
  #ifdef CONFIG_AVB_SUPPORT
  	/* secondary cmdline added by avb */
  	char *bootargs_sec = env_get("bootargs_sec");
  	if (bootargs_sec) {
  		strncat(commandline, " ", sizeof(commandline) - strlen(commandline));
  		strncat(commandline, bootargs_sec, sizeof(commandline) - strlen(commandline));
  	}
  #endif
  #ifdef CONFIG_SYSTEM_RAMDISK_SUPPORT
  	/* Normal boot:
  	 * cmdline to bypass ramdisk in boot.img, but use the system.img
  	 * Recovery boot:
  	 * Use the ramdisk in boot.img
  	 */
  	char *bootargs_3rd = env_get("bootargs_3rd");
  	if (bootargs_3rd) {
  		strncat(commandline, " ", sizeof(commandline) - strlen(commandline));
  		strncat(commandline, bootargs_3rd, sizeof(commandline) - strlen(commandline));
  	}
  #endif
  
  	/* VTS need this commandline to verify fdt overlay. Pass the
  	 * dtb index as "0" here since we only have one dtb in dtbo
  	 * partition and haven't enabled the dtb overlay.
  	 */
  #if defined(CONFIG_ANDROID_SUPPORT) || defined(CONFIG_ANDROID_AUTO_SUPPORT)
  	sprintf(newbootargs," androidboot.dtbo_idx=0");
  	strncat(commandline, newbootargs, sizeof(commandline) - strlen(commandline));
  #endif
  
  	char *keystore = env_get("keystore");
  	if ((keystore == NULL) || strncmp(keystore, "trusty", sizeof("trusty"))) {
  		char *bootargs_trusty = "androidboot.keystore=software";
  		strncat(commandline, " ", sizeof(commandline) - strlen(commandline));
  		strncat(commandline, bootargs_trusty, sizeof(commandline) - strlen(commandline));
  	} else {
  		char *bootargs_trusty = "androidboot.keystore=trusty";
  		strncat(commandline, " ", sizeof(commandline) - strlen(commandline));
  		strncat(commandline, bootargs_trusty, sizeof(commandline) - strlen(commandline));
  	}
  
  #ifdef CONFIG_APPEND_BOOTARGS
  	/* Add 'append_bootargs' to hold some paramemters which need to be appended
  	 * to bootargs */
  	char *append_bootargs = env_get("append_bootargs");
  	if (append_bootargs) {
  		if (strlen(append_bootargs) + 2 >
  				(sizeof(commandline) - strlen(commandline))) {
  			printf("The 'append_bootargs' is too long to be appended to bootargs
  ");
  		} else {
  			strncat(commandline, " ", sizeof(commandline) - strlen(commandline));
  			strncat(commandline, append_bootargs, sizeof(commandline) - strlen(commandline));
  		}
  	}
  #endif
  
  	debug("Kernel command line: %s
  ", commandline);
  	env_set("bootargs", commandline);

  
  	if (os_data) {

  		if (image_get_magic(ihdr) == IH_MAGIC) {
  			*os_data = image_get_data(ihdr);
  		} else {
  			*os_data = (ulong)hdr;
  			*os_data += hdr->page_size;
  		}
  	}
  	if (os_len) {
  		if (image_get_magic(ihdr) == IH_MAGIC)
  			*os_len = image_get_data_size(ihdr);
  		else
  			*os_len = hdr->kernel_size;

  	}

  	return 0;
  }
  
  int android_image_check_header(const struct andr_img_hdr *hdr)
  {
  	return memcmp(ANDR_BOOT_MAGIC, hdr->magic, ANDR_BOOT_MAGIC_SIZE);
  }
  
  ulong android_image_get_end(const struct andr_img_hdr *hdr)
  {

  	ulong end;

  	/*
  	 * The header takes a full page, the remaining components are aligned
  	 * on page boundary
  	 */

  	end = (ulong)hdr;
  	end += hdr->page_size;
  	end += ALIGN(hdr->kernel_size, hdr->page_size);
  	end += ALIGN(hdr->ramdisk_size, hdr->page_size);
  	end += ALIGN(hdr->second_size, hdr->page_size);

  	if (hdr->header_version >= 1)
  		end += ALIGN(hdr->recovery_dtbo_size, hdr->page_size);
  
  	if (hdr->header_version >= 2)
  		end += ALIGN(hdr->dtb_size, hdr->page_size);

  	return end;

  }
  
  ulong android_image_get_kload(const struct andr_img_hdr *hdr)
  {

  	return android_image_get_kernel_addr(hdr);

  }

  ulong android_image_get_kcomp(const struct andr_img_hdr *hdr)
  {
  	const void *p = (void *)((uintptr_t)hdr + hdr->page_size);

  	if (image_get_magic((image_header_t *)p) == IH_MAGIC)
  		return image_get_comp((image_header_t *)p);
  	else if (get_unaligned_le32(p) == LZ4F_MAGIC)

  		return IH_COMP_LZ4;
  	else
  		return IH_COMP_NONE;
  }

  int android_image_get_ramdisk(const struct andr_img_hdr *hdr,
  			      ulong *rd_data, ulong *rd_len)
  {

  	if (!hdr->ramdisk_size) {
  		*rd_data = *rd_len = 0;

  		return -1;

  	}

  
  	printf("RAM disk load addr 0x%08x size %u KiB
  ",
  	       hdr->ramdisk_addr, DIV_ROUND_UP(hdr->ramdisk_size, 1024));

  	*rd_data = (unsigned long)hdr;
  	*rd_data += hdr->page_size;
  	*rd_data += ALIGN(hdr->kernel_size, hdr->page_size);
  
  	*rd_len = hdr->ramdisk_size;
  	return 0;
  }

  int android_image_get_second(const struct andr_img_hdr *hdr,
  			      ulong *second_data, ulong *second_len)
  {
  	if (!hdr->second_size) {
  		*second_data = *second_len = 0;
  		return -1;
  	}
  
  	*second_data = (unsigned long)hdr;
  	*second_data += hdr->page_size;
  	*second_data += ALIGN(hdr->kernel_size, hdr->page_size);
  	*second_data += ALIGN(hdr->ramdisk_size, hdr->page_size);
  
  	printf("second address is 0x%lx
  ",*second_data);
  
  	*second_len = hdr->second_size;
  	return 0;
  }

  /**

   * android_image_get_dtbo() - Get address and size of recovery DTBO image.
   * @hdr_addr: Boot image header address
   * @addr: If not NULL, will contain address of recovery DTBO image
   * @size: If not NULL, will contain size of recovery DTBO image
   *
   * Get the address and size of DTBO image in "Recovery DTBO" area of Android
   * Boot Image in RAM. The format of this image is Android DTBO (see
   * corresponding "DTB/DTBO Partitions" AOSP documentation for details). Once
   * the address is obtained from this function, one can use 'adtimg' U-Boot
   * command or android_dt_*() functions to extract desired DTBO blob.
   *
   * This DTBO (included in boot image) is only needed for non-A/B devices, and it
   * only can be found in recovery image. On A/B devices we can always rely on
   * "dtbo" partition. See "Including DTBO in Recovery for Non-A/B Devices" in
   * AOSP documentation for details.
   *
   * Return: true on success or false on error.
   */
  bool android_image_get_dtbo(ulong hdr_addr, ulong *addr, u32 *size)
  {
  	const struct andr_img_hdr *hdr;
  	ulong dtbo_img_addr;
  	bool ret = true;
  
  	hdr = map_sysmem(hdr_addr, sizeof(*hdr));
  	if (android_image_check_header(hdr)) {
  		printf("Error: Boot Image header is incorrect
  ");
  		ret = false;
  		goto exit;
  	}
  
  	if (hdr->header_version < 1) {
  		printf("Error: header_version must be >= 1 to get dtbo
  ");
  		ret = false;
  		goto exit;
  	}
  
  	if (hdr->recovery_dtbo_size == 0) {
  		printf("Error: recovery_dtbo_size is 0
  ");
  		ret = false;
  		goto exit;
  	}
  
  	/* Calculate the address of DTB area in boot image */
  	dtbo_img_addr = hdr_addr;
  	dtbo_img_addr += hdr->page_size;
  	dtbo_img_addr += ALIGN(hdr->kernel_size, hdr->page_size);
  	dtbo_img_addr += ALIGN(hdr->ramdisk_size, hdr->page_size);
  	dtbo_img_addr += ALIGN(hdr->second_size, hdr->page_size);
  
  	if (addr)
  		*addr = dtbo_img_addr;
  	if (size)
  		*size = hdr->recovery_dtbo_size;
  
  exit:
  	unmap_sysmem(hdr);
  	return ret;
  }
  
  /**

   * android_image_get_dtb_img_addr() - Get the address of DTB area in boot image.
   * @hdr_addr: Boot image header address
   * @addr: Will contain the address of DTB area in boot image
   *
   * Return: true on success or false on fail.
   */
  static bool android_image_get_dtb_img_addr(ulong hdr_addr, ulong *addr)
  {
  	const struct andr_img_hdr *hdr;
  	ulong dtb_img_addr;
  	bool ret = true;
  
  	hdr = map_sysmem(hdr_addr, sizeof(*hdr));
  	if (android_image_check_header(hdr)) {
  		printf("Error: Boot Image header is incorrect
  ");
  		ret = false;
  		goto exit;
  	}
  
  	if (hdr->header_version < 2) {
  		printf("Error: header_version must be >= 2 to get dtb
  ");
  		ret = false;
  		goto exit;
  	}
  
  	if (hdr->dtb_size == 0) {
  		printf("Error: dtb_size is 0
  ");
  		ret = false;
  		goto exit;
  	}
  
  	/* Calculate the address of DTB area in boot image */
  	dtb_img_addr = hdr_addr;
  	dtb_img_addr += hdr->page_size;
  	dtb_img_addr += ALIGN(hdr->kernel_size, hdr->page_size);
  	dtb_img_addr += ALIGN(hdr->ramdisk_size, hdr->page_size);
  	dtb_img_addr += ALIGN(hdr->second_size, hdr->page_size);
  	dtb_img_addr += ALIGN(hdr->recovery_dtbo_size, hdr->page_size);
  
  	*addr = dtb_img_addr;
  
  exit:
  	unmap_sysmem(hdr);
  	return ret;
  }
  
  /**
   * android_image_get_dtb_by_index() - Get address and size of blob in DTB area.
   * @hdr_addr: Boot image header address
   * @index: Index of desired DTB in DTB area (starting from 0)
   * @addr: If not NULL, will contain address to specified DTB
   * @size: If not NULL, will contain size of specified DTB
   *
   * Get the address and size of DTB blob by its index in DTB area of Android
   * Boot Image in RAM.
   *
   * Return: true on success or false on error.
   */
  bool android_image_get_dtb_by_index(ulong hdr_addr, u32 index, ulong *addr,
  				    u32 *size)
  {
  	const struct andr_img_hdr *hdr;
  	bool res;
  	ulong dtb_img_addr;	/* address of DTB part in boot image */
  	u32 dtb_img_size;	/* size of DTB payload in boot image */
  	ulong dtb_addr;		/* address of DTB blob with specified index  */
  	u32 i;			/* index iterator */
  
  	res = android_image_get_dtb_img_addr(hdr_addr, &dtb_img_addr);
  	if (!res)
  		return false;
  
  	/* Check if DTB area of boot image is in DTBO format */
  	if (android_dt_check_header(dtb_img_addr)) {
  		return android_dt_get_fdt_by_index(dtb_img_addr, index, addr,
  						   size);
  	}
  
  	/* Find out the address of DTB with specified index in concat blobs */
  	hdr = map_sysmem(hdr_addr, sizeof(*hdr));
  	dtb_img_size = hdr->dtb_size;
  	unmap_sysmem(hdr);
  	i = 0;
  	dtb_addr = dtb_img_addr;
  	while (dtb_addr < dtb_img_addr + dtb_img_size) {
  		const struct fdt_header *fdt;
  		u32 dtb_size;
  
  		fdt = map_sysmem(dtb_addr, sizeof(*fdt));
  		if (fdt_check_header(fdt) != 0) {
  			unmap_sysmem(fdt);
  			printf("Error: Invalid FDT header for index %u
  ", i);
  			return false;
  		}
  
  		dtb_size = fdt_totalsize(fdt);
  		unmap_sysmem(fdt);
  
  		if (i == index) {
  			if (size)
  				*size = dtb_size;
  			if (addr)
  				*addr = dtb_addr;
  			return true;
  		}
  
  		dtb_addr += dtb_size;
  		++i;
  	}
  
  	printf("Error: Index is out of bounds (%u/%u)
  ", index, i);
  	return false;
  }

  #if !defined(CONFIG_SPL_BUILD)
  /**
   * android_print_contents - prints out the contents of the Android format image
   * @hdr: pointer to the Android format image header
   *
   * android_print_contents() formats a multi line Android image contents
   * description.
   * The routine prints out Android image properties
   *
   * returns:
   *     no returned results
   */
  void android_print_contents(const struct andr_img_hdr *hdr)
  {
  	const char * const p = IMAGE_INDENT_STRING;

  	/* os_version = ver << 11 | lvl */
  	u32 os_ver = hdr->os_version >> 11;
  	u32 os_lvl = hdr->os_version & ((1U << 11) - 1);

  	printf("%skernel size:          %x
  ", p, hdr->kernel_size);
  	printf("%skernel address:       %x
  ", p, hdr->kernel_addr);
  	printf("%sramdisk size:         %x
  ", p, hdr->ramdisk_size);
  	printf("%sramdisk address:      %x
  ", p, hdr->ramdisk_addr);
  	printf("%ssecond size:          %x
  ", p, hdr->second_size);
  	printf("%ssecond address:       %x
  ", p, hdr->second_addr);
  	printf("%stags address:         %x
  ", p, hdr->tags_addr);
  	printf("%spage size:            %x
  ", p, hdr->page_size);

  	/* ver = A << 14 | B << 7 | C         (7 bits for each of A, B, C)
  	 * lvl = ((Y - 2000) & 127) << 4 | M  (7 bits for Y, 4 bits for M) */

  	printf("%sos_version:           %x (ver: %u.%u.%u, level: %u.%u)
  ",

  	       p, hdr->os_version,
  	       (os_ver >> 7) & 0x7F, (os_ver >> 14) & 0x7F, os_ver & 0x7F,
  	       (os_lvl >> 4) + 2000, os_lvl & 0x0F);

  	printf("%sname:                 %s
  ", p, hdr->name);
  	printf("%scmdline:              %s
  ", p, hdr->cmdline);
  	printf("%sheader_version:       %d
  ", p, hdr->header_version);
  
  	if (hdr->header_version >= 1) {
  		printf("%srecovery dtbo size:   %x
  ", p,
  		       hdr->recovery_dtbo_size);
  		printf("%srecovery dtbo offset: %llx
  ", p,
  		       hdr->recovery_dtbo_offset);
  		printf("%sheader size:          %x
  ", p,
  		       hdr->header_size);
  	}
  
  	if (hdr->header_version >= 2) {
  		printf("%sdtb size:             %x
  ", p, hdr->dtb_size);
  		printf("%sdtb addr:             %llx
  ", p, hdr->dtb_addr);
  	}

  }

  
  /**
   * android_image_print_dtb_info - Print info for one DTB blob in DTB area.
   * @fdt: DTB header
   * @index: Number of DTB blob in DTB area.
   *
   * Return: true on success or false on error.
   */
  static bool android_image_print_dtb_info(const struct fdt_header *fdt,
  					 u32 index)
  {
  	int root_node_off;
  	u32 fdt_size;
  	const char *model;
  	const char *compatible;
  
  	root_node_off = fdt_path_offset(fdt, "/");
  	if (root_node_off < 0) {
  		printf("Error: Root node not found
  ");
  		return false;
  	}
  
  	fdt_size = fdt_totalsize(fdt);
  	compatible = fdt_getprop(fdt, root_node_off, "compatible",
  				 NULL);
  	model = fdt_getprop(fdt, root_node_off, "model", NULL);
  
  	printf(" - DTB #%u:
  ", index);
  	printf("           (DTB)size = %d
  ", fdt_size);
  	printf("          (DTB)model = %s
  ", model ? model : "(unknown)");
  	printf("     (DTB)compatible = %s
  ",
  	       compatible ? compatible : "(unknown)");
  
  	return true;
  }
  
  /**
   * android_image_print_dtb_contents() - Print info for DTB blobs in DTB area.
   * @hdr_addr: Boot image header address
   *
   * DTB payload in Android Boot Image v2+ can be in one of following formats:
   *   1. Concatenated DTB blobs
   *   2. Android DTBO format (see CONFIG_CMD_ADTIMG for details)
   *
   * This function does next:
   *   1. Prints out the format used in DTB area
   *   2. Iterates over all DTB blobs in DTB area and prints out the info for
   *      each blob.
   *
   * Return: true on success or false on error.
   */
  bool android_image_print_dtb_contents(ulong hdr_addr)
  {
  	const struct andr_img_hdr *hdr;
  	bool res;
  	ulong dtb_img_addr;	/* address of DTB part in boot image */
  	u32 dtb_img_size;	/* size of DTB payload in boot image */
  	ulong dtb_addr;		/* address of DTB blob with specified index  */
  	u32 i;			/* index iterator */
  
  	res = android_image_get_dtb_img_addr(hdr_addr, &dtb_img_addr);
  	if (!res)
  		return false;
  
  	/* Check if DTB area of boot image is in DTBO format */
  	if (android_dt_check_header(dtb_img_addr)) {
  		printf("## DTB area contents (DTBO format):
  ");
  		android_dt_print_contents(dtb_img_addr);
  		return true;
  	}
  
  	printf("## DTB area contents (concat format):
  ");
  
  	/* Iterate over concatenated DTB blobs */
  	hdr = map_sysmem(hdr_addr, sizeof(*hdr));
  	dtb_img_size = hdr->dtb_size;
  	unmap_sysmem(hdr);
  	i = 0;
  	dtb_addr = dtb_img_addr;
  	while (dtb_addr < dtb_img_addr + dtb_img_size) {
  		const struct fdt_header *fdt;
  		u32 dtb_size;
  
  		fdt = map_sysmem(dtb_addr, sizeof(*fdt));
  		if (fdt_check_header(fdt) != 0) {
  			unmap_sysmem(fdt);
  			printf("Error: Invalid FDT header for index %u
  ", i);
  			return false;
  		}
  
  		res = android_image_print_dtb_info(fdt, i);
  		if (!res) {
  			unmap_sysmem(fdt);
  			return false;
  		}
  
  		dtb_size = fdt_totalsize(fdt);
  		unmap_sysmem(fdt);
  		dtb_addr += dtb_size;
  		++i;
  	}
  
  	return true;
  }

  #endif

  
  #define ARM64_IMAGE_MAGIC	0x644d5241
  bool image_arm64(void *images)
  {
  	struct header_image *ih;
  
  	ih = (struct header_image *)images;
  	debug("image magic: %x
  ", ih->magic);
  	if (ih->magic == le32_to_cpu(ARM64_IMAGE_MAGIC))
  		return true;
  	return false;
  }