boot/image-fdt.c - platform/external/u-boot - Gitiles

 // 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.
  */

 #include <common.h>
 #include <command.h>
 #include <fdt_support.h>
 #include <fdtdec.h>
 #include <env.h>
 #include <errno.h>
 #include <image.h>
 #include <lmb.h>
 #include <log.h>
 #include <malloc.h>
 #include <asm/global_data.h>
 #include <linux/libfdt.h>
 #include <mapmem.h>
 #include <asm/io.h>
 #include <dm/ofnode.h>
 #include <tee/optee.h>

 DECLARE_GLOBAL_DATA_PTR;

 static void fdt_error(const char *msg)
 {
 	puts("ERROR: ");
 	puts(msg);
 	puts(" - must RESET the board to recover.\n");
 }

 #if CONFIG_IS_ENABLED(LEGACY_IMAGE_FORMAT)
 static const struct legacy_img_hdr *image_get_fdt(ulong fdt_addr)
 {
 	const struct legacy_img_hdr *fdt_hdr = map_sysmem(fdt_addr, 0);

 	image_print_contents(fdt_hdr);

 	puts("   Verifying Checksum ... ");
 	if (!image_check_hcrc(fdt_hdr)) {
 		fdt_error("fdt header checksum invalid");
 		return NULL;
 	}

 	if (!image_check_dcrc(fdt_hdr)) {
 		fdt_error("fdt checksum invalid");
 		return NULL;
 	}
 	puts("OK\n");

 	if (!image_check_type(fdt_hdr, IH_TYPE_FLATDT)) {
 		fdt_error("uImage is not a fdt");
 		return NULL;
 	}
 	if (image_get_comp(fdt_hdr) != IH_COMP_NONE) {
 		fdt_error("uImage is compressed");
 		return NULL;
 	}
 	if (fdt_check_header((void *)image_get_data(fdt_hdr)) != 0) {
 		fdt_error("uImage data is not a fdt");
 		return NULL;
 	}
 	return fdt_hdr;
 }
 #endif

 static void boot_fdt_reserve_region(struct lmb *lmb, uint64_t addr,
 				    uint64_t size, enum lmb_flags flags)
 {
 	long ret;

 	ret = lmb_reserve_flags(lmb, addr, size, flags);
 	if (ret >= 0) {
 		debug("   reserving fdt memory region: addr=%llx size=%llx flags=%x\n",
 		      (unsigned long long)addr,
 		      (unsigned long long)size, flags);
 	} else {
 		puts("ERROR: reserving fdt memory region failed ");
 		printf("(addr=%llx size=%llx flags=%x)\n",
 		       (unsigned long long)addr,
 		       (unsigned long long)size, flags);
 	}
 }

 /**
  * boot_fdt_add_mem_rsv_regions - Mark the memreserve and reserved-memory
  * sections as unusable
  * @lmb: pointer to lmb handle, will be used for memory mgmt
  * @fdt_blob: pointer to fdt blob base address
  *
  * Adds the and reserved-memorymemreserve regions in the dtb to the lmb block.
  * Adding the memreserve regions prevents u-boot from using them to store the
  * initrd or the fdt blob.
  */
 void boot_fdt_add_mem_rsv_regions(struct lmb *lmb, void *fdt_blob)
 {
 	uint64_t addr, size;
 	int i, total, ret;
 	int nodeoffset, subnode;
 	struct fdt_resource res;
 	enum lmb_flags flags;

 	if (fdt_check_header(fdt_blob) != 0)
 		return;

 	/* process memreserve sections */
 	total = fdt_num_mem_rsv(fdt_blob);
 	for (i = 0; i < total; i++) {
 		if (fdt_get_mem_rsv(fdt_blob, i, &addr, &size) != 0)
 			continue;
 		boot_fdt_reserve_region(lmb, addr, size, LMB_NONE);
 	}

 	/* process reserved-memory */
 	nodeoffset = fdt_subnode_offset(fdt_blob, 0, "reserved-memory");
 	if (nodeoffset >= 0) {
 		subnode = fdt_first_subnode(fdt_blob, nodeoffset);
 		while (subnode >= 0) {
 			/* check if this subnode has a reg property */
 			ret = fdt_get_resource(fdt_blob, subnode, "reg", 0,
 					       &res);
 			if (!ret && fdtdec_get_is_enabled(fdt_blob, subnode)) {
 				flags = LMB_NONE;
 				if (fdtdec_get_bool(fdt_blob, subnode,
 						    "no-map"))
 					flags = LMB_NOMAP;
 				addr = res.start;
 				size = res.end - res.start + 1;
 				boot_fdt_reserve_region(lmb, addr, size, flags);
 			}

 			subnode = fdt_next_subnode(fdt_blob, subnode);
 		}
 	}
 }

 /**
  * boot_relocate_fdt - relocate flat device tree
  * @lmb: pointer to lmb handle, will be used for memory mgmt
  * @of_flat_tree: pointer to a char* variable, will hold fdt start address
  * @of_size: pointer to a ulong variable, will hold fdt length
  *
  * boot_relocate_fdt() allocates a region of memory within the bootmap and
  * relocates the of_flat_tree into that region, even if the fdt is already in
  * the bootmap.  It also expands the size of the fdt by CONFIG_SYS_FDT_PAD
  * bytes.
  *
  * of_flat_tree and of_size are set to final (after relocation) values
  *
  * returns:
  *      0 - success
  *      1 - failure
  */
 int boot_relocate_fdt(struct lmb *lmb, char **of_flat_tree, ulong *of_size)
 {
 	u64	start, size, usable, addr, low, mapsize;
 	void	*fdt_blob = *of_flat_tree;
 	void	*of_start = NULL;
 	char	*fdt_high;
 	ulong	of_len = 0;
 	int	bank;
 	int	err;
 	int	disable_relocation = 0;

 	/* nothing to do */
 	if (*of_size == 0)
 		return 0;

 	if (fdt_check_header(fdt_blob) != 0) {
 		fdt_error("image is not a fdt");
 		goto error;
 	}

 	/* position on a 4K boundary before the alloc_current */
 	/* Pad the FDT by a specified amount */
 	of_len = *of_size + CONFIG_SYS_FDT_PAD;

 	/* If fdt_high is set use it to select the relocation address */
 	fdt_high = env_get("fdt_high");
 	if (fdt_high) {
 		ulong desired_addr = hextoul(fdt_high, NULL);

 		if (desired_addr == ~0UL) {
 			/* All ones means use fdt in place */
 			of_start = fdt_blob;
 			lmb_reserve(lmb, map_to_sysmem(of_start), of_len);
 			disable_relocation = 1;
 		} else if (desired_addr) {
 			addr = lmb_alloc_base(lmb, of_len, 0x1000,
 					      desired_addr);
 			of_start = map_sysmem(addr, of_len);
 			if (of_start == NULL) {
 				puts("Failed using fdt_high value for Device Tree");
 				goto error;
 			}
 		} else {
 			addr = lmb_alloc(lmb, of_len, 0x1000);
 			of_start = map_sysmem(addr, of_len);
 		}
 	} else {
 		mapsize = env_get_bootm_mapsize();
 		low = env_get_bootm_low();
 		of_start = NULL;

 		for (bank = 0; bank < CONFIG_NR_DRAM_BANKS; bank++) {
 			start = gd->bd->bi_dram[bank].start;
 			size = gd->bd->bi_dram[bank].size;

 			/* DRAM bank addresses are too low, skip it. */
 			if (start + size < low)
 				continue;

 			/*
 			 * At least part of this DRAM bank is usable, try
 			 * using the DRAM bank up to 'usable' address limit
 			 * for LMB allocation.
 			 */
 			usable = min(start + size, low + mapsize);
 			addr = lmb_alloc_base(lmb, of_len, 0x1000, usable);
 			of_start = map_sysmem(addr, of_len);
 			/* Allocation succeeded, use this block. */
 			if (of_start != NULL)
 				break;

 			/*
 			 * Reduce the mapping size in the next bank
 			 * by the size of attempt in current bank.
 			 */
 			mapsize -= usable - max(start, low);
 			if (!mapsize)
 				break;
 		}
 	}

 	if (of_start == NULL) {
 		puts("device tree - allocation error\n");
 		goto error;
 	}

 	if (disable_relocation) {
 		/*
 		 * We assume there is space after the existing fdt to use
 		 * for padding
 		 */
 		fdt_set_totalsize(of_start, of_len);
 		printf("   Using Device Tree in place at %p, end %p\n",
 		       of_start, of_start + of_len - 1);
 	} else {
 		debug("## device tree at %p ... %p (len=%ld [0x%lX])\n",
 		      fdt_blob, fdt_blob + *of_size - 1, of_len, of_len);

 		printf("   Loading Device Tree to %p, end %p ... ",
 		       of_start, of_start + of_len - 1);

 		err = fdt_open_into(fdt_blob, of_start, of_len);
 		if (err != 0) {
 			fdt_error("fdt move failed");
 			goto error;
 		}
 		puts("OK\n");
 	}

 	*of_flat_tree = of_start;
 	*of_size = of_len;

 	if (IS_ENABLED(CONFIG_CMD_FDT))
 		set_working_fdt_addr(map_to_sysmem(*of_flat_tree));
 	return 0;

 error:
 	return 1;
 }

 /**
  * select_fdt() - Select and locate the FDT to use
  *
  * @images: pointer to the bootm images structure
  * @select: name of FDT to select, or NULL for any
  * @arch: expected FDT architecture
  * @fdt_addrp: pointer to a ulong variable, will hold FDT pointer
  * Return: 0 if OK, -ENOPKG if no FDT (but an error should not be reported),
  *	other -ve value on other error
  */

 static int select_fdt(struct bootm_headers *images, const char *select, u8 arch,
 		      ulong *fdt_addrp)
 {
 	const char *buf;
 	ulong fdt_addr;

 #if CONFIG_IS_ENABLED(FIT)
 	const char *fit_uname_config = images->fit_uname_cfg;
 	const char *fit_uname_fdt = NULL;
 	ulong default_addr;
 	int fdt_noffset;

 	if (select) {
 			/*
 			 * If the FDT blob comes from the FIT image and the
 			 * FIT image address is omitted in the command line
 			 * argument, try to use ramdisk or os FIT image
 			 * address or default load address.
 			 */
 			if (images->fit_uname_rd)
 				default_addr = (ulong)images->fit_hdr_rd;
 			else if (images->fit_uname_os)
 				default_addr = (ulong)images->fit_hdr_os;
 			else
 				default_addr = image_load_addr;

 			if (fit_parse_conf(select, default_addr, &fdt_addr,
 					   &fit_uname_config)) {
 				debug("*  fdt: config '%s' from image at 0x%08lx\n",
 				      fit_uname_config, fdt_addr);
 			} else if (fit_parse_subimage(select, default_addr, &fdt_addr,
 				   &fit_uname_fdt)) {
 				debug("*  fdt: subimage '%s' from image at 0x%08lx\n",
 				      fit_uname_fdt, fdt_addr);
 			} else
 #endif
 		{
 			fdt_addr = hextoul(select, NULL);
 			debug("*  fdt: cmdline image address = 0x%08lx\n",
 			      fdt_addr);
 		}
 #if CONFIG_IS_ENABLED(FIT)
 	} else {
 		/* use FIT configuration provided in first bootm
 		 * command argument
 		 */
 		fdt_addr = map_to_sysmem(images->fit_hdr_os);
 		fdt_noffset = fit_get_node_from_config(images, FIT_FDT_PROP,
 						       fdt_addr);
 		if (fdt_noffset == -ENOENT)
 			return -ENOPKG;
 		else if (fdt_noffset < 0)
 			return fdt_noffset;
 	}
 #endif
 	debug("## Checking for 'FDT'/'FDT Image' at %08lx\n",
 	      fdt_addr);

 	/*
 	 * Check if there is an FDT image at the
 	 * address provided in the second bootm argument
 	 * check image type, for FIT images get a FIT node.
 	 */
 	buf = map_sysmem(fdt_addr, 0);
 	switch (genimg_get_format(buf)) {
 #if CONFIG_IS_ENABLED(LEGACY_IMAGE_FORMAT)
 	case IMAGE_FORMAT_LEGACY: {
 			const struct legacy_img_hdr *fdt_hdr;
 			ulong load, load_end;
 			ulong image_start, image_data, image_end;

 			/* verify fdt_addr points to a valid image header */
 			printf("## Flattened Device Tree from Legacy Image at %08lx\n",
 			       fdt_addr);
 			fdt_hdr = image_get_fdt(fdt_addr);
 			if (!fdt_hdr)
 				return -ENOPKG;

 			/*
 			 * move image data to the load address,
 			 * make sure we don't overwrite initial image
 			 */
 			image_start = (ulong)fdt_hdr;
 			image_data = (ulong)image_get_data(fdt_hdr);
 			image_end = image_get_image_end(fdt_hdr);

 			load = image_get_load(fdt_hdr);
 			load_end = load + image_get_data_size(fdt_hdr);

 			if (load == image_start ||
 			    load == image_data) {
 				fdt_addr = load;
 				break;
 			}

 			if ((load < image_end) && (load_end > image_start)) {
 				fdt_error("fdt overwritten");
 				return -EFAULT;
 			}

 			debug("   Loading FDT from 0x%08lx to 0x%08lx\n",
 			      image_data, load);

 			memmove((void *)load,
 				(void *)image_data,
 				image_get_data_size(fdt_hdr));

 			fdt_addr = load;
 			break;
 		}
 #endif
 	case IMAGE_FORMAT_FIT:
 		/*
 		 * This case will catch both: new uImage format
 		 * (libfdt based) and raw FDT blob (also libfdt
 		 * based).
 		 */
 #if CONFIG_IS_ENABLED(FIT)
 			/* check FDT blob vs FIT blob */
 			if (!fit_check_format(buf, IMAGE_SIZE_INVAL)) {
 				ulong load, len;

 				fdt_noffset = boot_get_fdt_fit(images, fdt_addr,
 							       &fit_uname_fdt,
 							       &fit_uname_config,
 							       arch, &load, &len);

 				if (fdt_noffset < 0)
 					return -ENOENT;

 				images->fit_hdr_fdt = map_sysmem(fdt_addr, 0);
 				images->fit_uname_fdt = fit_uname_fdt;
 				images->fit_noffset_fdt = fdt_noffset;
 				fdt_addr = load;

 				break;
 		} else
 #endif
 		{
 			/*
 			 * FDT blob
 			 */
 			debug("*  fdt: raw FDT blob\n");
 			printf("## Flattened Device Tree blob at %08lx\n",
 			       (long)fdt_addr);
 		}
 		break;
 	default:
 		puts("ERROR: Did not find a cmdline Flattened Device Tree\n");
 		return -ENOENT;
 	}
 	*fdt_addrp = fdt_addr;

 	return 0;
 }

 int boot_get_fdt(void *buf, const char *select, uint arch,
 		 struct bootm_headers *images, char **of_flat_tree,
 		 ulong *of_size)
 {
 	char *fdt_blob = NULL;
 	ulong fdt_addr;

 	*of_flat_tree = NULL;
 	*of_size = 0;

 	if (select || genimg_has_config(images)) {
 		int ret;

 		ret = select_fdt(images, select, arch, &fdt_addr);
 		if (ret == -ENOPKG)
 			goto no_fdt;
 		else if (ret)
 			return 1;
 		printf("   Booting using the fdt blob at %#08lx\n", fdt_addr);
 		fdt_blob = map_sysmem(fdt_addr, 0);
 	} else if (images->legacy_hdr_valid &&
 			image_check_type(&images->legacy_hdr_os_copy,
 					 IH_TYPE_MULTI)) {
 		ulong fdt_data, fdt_len;

 		/*
 		 * Now check if we have a legacy multi-component image,
 		 * get second entry data start address and len.
 		 */
 		printf("## Flattened Device Tree from multi component Image at %08lX\n",
 		       (ulong)images->legacy_hdr_os);

 		image_multi_getimg(images->legacy_hdr_os, 2, &fdt_data,
 				   &fdt_len);
 		if (fdt_len) {
 			fdt_blob = (char *)fdt_data;
 			printf("   Booting using the fdt at 0x%p\n", fdt_blob);

 			if (fdt_check_header(fdt_blob) != 0) {
 				fdt_error("image is not a fdt");
 				goto error;
 			}

 			if (fdt_totalsize(fdt_blob) != fdt_len) {
 				fdt_error("fdt size != image size");
 				goto error;
 			}
 		} else {
 			debug("## No Flattened Device Tree\n");
 			goto no_fdt;
 		}
 #ifdef CONFIG_ANDROID_BOOT_IMAGE
 	} else if (genimg_get_format(buf) == IMAGE_FORMAT_ANDROID) {
 		void *hdr = buf;
 		ulong		fdt_data, fdt_len;
 		u32			fdt_size, dtb_idx;
 		/*
 		 * Firstly check if this android boot image has dtb field.
 		 */
 		dtb_idx = (u32)env_get_ulong("adtb_idx", 10, 0);
 		if (android_image_get_dtb_by_index((ulong)hdr, 0,
 						   dtb_idx, &fdt_addr, &fdt_size)) {
 			fdt_blob = (char *)map_sysmem(fdt_addr, 0);
 			if (fdt_check_header(fdt_blob))
 				goto no_fdt;

 			debug("## Using FDT in Android image dtb area with idx %u\n", dtb_idx);
 		} else if (!android_image_get_second(hdr, &fdt_data, &fdt_len) &&
 			!fdt_check_header((char *)fdt_data)) {
 			fdt_blob = (char *)fdt_data;
 			if (fdt_totalsize(fdt_blob) != fdt_len)
 				goto error;

 			debug("## Using FDT in Android image second area\n");
 		} else {
 			fdt_addr = env_get_hex("fdtaddr", 0);
 			if (!fdt_addr)
 				goto no_fdt;

 			fdt_blob = map_sysmem(fdt_addr, 0);
 			if (fdt_check_header(fdt_blob))
 				goto no_fdt;

 			debug("## Using FDT at ${fdtaddr}=Ox%lx\n", fdt_addr);
 		}
 #endif
 	} else {
 		debug("## No Flattened Device Tree\n");
 		goto no_fdt;
 	}

 	*of_flat_tree = fdt_blob;
 	*of_size = fdt_totalsize(fdt_blob);
 	debug("   of_flat_tree at 0x%08lx size 0x%08lx\n",
 	      (ulong)*of_flat_tree, *of_size);

 	return 0;

 no_fdt:
 	debug("Continuing to boot without FDT\n");
 	return 0;
 error:
 	return 1;
 }

 /*
  * Verify the device tree.
  *
  * This function is called after all device tree fix-ups have been enacted,
  * so that the final device tree can be verified.  The definition of "verified"
  * is up to the specific implementation.  However, it generally means that the
  * addresses of some of the devices in the device tree are compared with the
  * actual addresses at which U-Boot has placed them.
  *
  * Returns 1 on success, 0 on failure.  If 0 is returned, U-Boot will halt the
  * boot process.
  */
 __weak int ft_verify_fdt(void *fdt)
 {
 	return 1;
 }

 __weak int arch_fixup_fdt(void *blob)
 {
 	return 0;
 }

 int image_setup_libfdt(struct bootm_headers *images, void *blob,
 		       struct lmb *lmb)
 {
 	ulong *initrd_start = &images->initrd_start;
 	ulong *initrd_end = &images->initrd_end;
 	int ret, fdt_ret, of_size;

 	if (IS_ENABLED(CONFIG_OF_ENV_SETUP)) {
 		const char *fdt_fixup;

 		fdt_fixup = env_get("fdt_fixup");
 		if (fdt_fixup) {
 			set_working_fdt_addr(map_to_sysmem(blob));
 			ret = run_command_list(fdt_fixup, -1, 0);
 			if (ret)
 				printf("WARNING: fdt_fixup command returned %d\n",
 				       ret);
 		}
 	}

 	ret = -EPERM;

 	if (fdt_root(blob) < 0) {
 		printf("ERROR: root node setup failed\n");
 		goto err;
 	}
 	if (fdt_chosen(blob) < 0) {
 		printf("ERROR: /chosen node create failed\n");
 		goto err;
 	}
 	if (arch_fixup_fdt(blob) < 0) {
 		printf("ERROR: arch-specific fdt fixup failed\n");
 		goto err;
 	}

 	fdt_ret = optee_copy_fdt_nodes(blob);
 	if (fdt_ret) {
 		printf("ERROR: transfer of optee nodes to new fdt failed: %s\n",
 		       fdt_strerror(fdt_ret));
 		goto err;
 	}

 	/* Store name of configuration node as u-boot,bootconf in /chosen node */
 	if (images->fit_uname_cfg)
 		fdt_find_and_setprop(blob, "/chosen", "u-boot,bootconf",
 					images->fit_uname_cfg,
 					strlen(images->fit_uname_cfg) + 1, 1);

 	/* Update ethernet nodes */
 	fdt_fixup_ethernet(blob);
 #if IS_ENABLED(CONFIG_CMD_PSTORE)
 	/* Append PStore configuration */
 	fdt_fixup_pstore(blob);
 #endif
 	if (IS_ENABLED(CONFIG_OF_BOARD_SETUP)) {
 		const char *skip_board_fixup;

 		skip_board_fixup = env_get("skip_board_fixup");
 		if (skip_board_fixup && ((int)simple_strtol(skip_board_fixup, NULL, 10) == 1)) {
 			printf("skip board fdt fixup\n");
 		} else {
 			fdt_ret = ft_board_setup(blob, gd->bd);
 			if (fdt_ret) {
 				printf("ERROR: board-specific fdt fixup failed: %s\n",
 				       fdt_strerror(fdt_ret));
 				goto err;
 			}
 		}
 	}
 	if (IS_ENABLED(CONFIG_OF_SYSTEM_SETUP)) {
 		fdt_ret = ft_system_setup(blob, gd->bd);
 		if (fdt_ret) {
 			printf("ERROR: system-specific fdt fixup failed: %s\n",
 			       fdt_strerror(fdt_ret));
 			goto err;
 		}
 	}

 	if (fdt_initrd(blob, *initrd_start, *initrd_end))
 		goto err;

 	if (!ft_verify_fdt(blob))
 		goto err;

 	/* after here we are using a livetree */
 	if (!of_live_active() && CONFIG_IS_ENABLED(EVENT)) {
 		struct event_ft_fixup fixup;

 		fixup.tree = oftree_from_fdt(blob);
 		fixup.images = images;
 		if (oftree_valid(fixup.tree)) {
 			ret = event_notify(EVT_FT_FIXUP, &fixup, sizeof(fixup));
 			if (ret) {
 				printf("ERROR: fdt fixup event failed: %d\n",
 				       ret);
 				goto err;
 			}
 		}
 	}

 	/* Delete the old LMB reservation */
 	if (lmb)
 		lmb_free(lmb, map_to_sysmem(blob), fdt_totalsize(blob));

 	ret = fdt_shrink_to_minimum(blob, 0);
 	if (ret < 0)
 		goto err;
 	of_size = ret;

 	/* Create a new LMB reservation */
 	if (lmb)
 		lmb_reserve(lmb, map_to_sysmem(blob), of_size);

 #if defined(CONFIG_ARCH_KEYSTONE)
 	if (IS_ENABLED(CONFIG_OF_BOARD_SETUP))
 		ft_board_setup_ex(blob, gd->bd);
 #endif

 	return 0;
 err:
 	printf(" - must RESET the board to recover.\n\n");

 	return ret;
 }
	// 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.
	*/

	#include <common.h>
	#include <command.h>
	#include <fdt_support.h>
	#include <fdtdec.h>
	#include <env.h>
	#include <errno.h>
	#include <image.h>
	#include <lmb.h>
	#include <log.h>
	#include <malloc.h>
	#include <asm/global_data.h>
	#include <linux/libfdt.h>
	#include <mapmem.h>
	#include <asm/io.h>
	#include <dm/ofnode.h>
	#include <tee/optee.h>

	DECLARE_GLOBAL_DATA_PTR;

	static void fdt_error(const char *msg)
	{
	puts("ERROR: ");
	puts(msg);
	puts(" - must RESET the board to recover.\n");
	}

	#if CONFIG_IS_ENABLED(LEGACY_IMAGE_FORMAT)
	static const struct legacy_img_hdr *image_get_fdt(ulong fdt_addr)
	{
	const struct legacy_img_hdr *fdt_hdr = map_sysmem(fdt_addr, 0);

	image_print_contents(fdt_hdr);

	puts(" Verifying Checksum ... ");
	if (!image_check_hcrc(fdt_hdr)) {
	fdt_error("fdt header checksum invalid");
	return NULL;
	}

	if (!image_check_dcrc(fdt_hdr)) {
	fdt_error("fdt checksum invalid");
	return NULL;
	}
	puts("OK\n");

	if (!image_check_type(fdt_hdr, IH_TYPE_FLATDT)) {
	fdt_error("uImage is not a fdt");
	return NULL;
	}
	if (image_get_comp(fdt_hdr) != IH_COMP_NONE) {
	fdt_error("uImage is compressed");
	return NULL;
	}
	if (fdt_check_header((void *)image_get_data(fdt_hdr)) != 0) {
	fdt_error("uImage data is not a fdt");
	return NULL;
	}
	return fdt_hdr;
	}
	#endif

	static void boot_fdt_reserve_region(struct lmb *lmb, uint64_t addr,
	uint64_t size, enum lmb_flags flags)
	{
	long ret;

	ret = lmb_reserve_flags(lmb, addr, size, flags);
	if (ret >= 0) {
	debug(" reserving fdt memory region: addr=%llx size=%llx flags=%x\n",
	(unsigned long long)addr,
	(unsigned long long)size, flags);
	} else {
	puts("ERROR: reserving fdt memory region failed ");
	printf("(addr=%llx size=%llx flags=%x)\n",
	(unsigned long long)addr,
	(unsigned long long)size, flags);
	}
	}

	/**
	* boot_fdt_add_mem_rsv_regions - Mark the memreserve and reserved-memory
	* sections as unusable
	* @lmb: pointer to lmb handle, will be used for memory mgmt
	* @fdt_blob: pointer to fdt blob base address
	*
	* Adds the and reserved-memorymemreserve regions in the dtb to the lmb block.
	* Adding the memreserve regions prevents u-boot from using them to store the
	* initrd or the fdt blob.
	*/
	void boot_fdt_add_mem_rsv_regions(struct lmb lmb, void fdt_blob)
	{
	uint64_t addr, size;
	int i, total, ret;
	int nodeoffset, subnode;
	struct fdt_resource res;
	enum lmb_flags flags;

	if (fdt_check_header(fdt_blob) != 0)
	return;

	/* process memreserve sections */
	total = fdt_num_mem_rsv(fdt_blob);
	for (i = 0; i < total; i++) {
	if (fdt_get_mem_rsv(fdt_blob, i, &addr, &size) != 0)
	continue;
	boot_fdt_reserve_region(lmb, addr, size, LMB_NONE);
	}

	/* process reserved-memory */
	nodeoffset = fdt_subnode_offset(fdt_blob, 0, "reserved-memory");
	if (nodeoffset >= 0) {
	subnode = fdt_first_subnode(fdt_blob, nodeoffset);
	while (subnode >= 0) {
	/* check if this subnode has a reg property */
	ret = fdt_get_resource(fdt_blob, subnode, "reg", 0,
	&res);
	if (!ret && fdtdec_get_is_enabled(fdt_blob, subnode)) {
	flags = LMB_NONE;
	if (fdtdec_get_bool(fdt_blob, subnode,
	"no-map"))
	flags = LMB_NOMAP;
	addr = res.start;
	size = res.end - res.start + 1;
	boot_fdt_reserve_region(lmb, addr, size, flags);
	}

	subnode = fdt_next_subnode(fdt_blob, subnode);
	}
	}
	}

	/**
	* boot_relocate_fdt - relocate flat device tree
	* @lmb: pointer to lmb handle, will be used for memory mgmt
	* @of_flat_tree: pointer to a char* variable, will hold fdt start address
	* @of_size: pointer to a ulong variable, will hold fdt length
	*
	* boot_relocate_fdt() allocates a region of memory within the bootmap and
	* relocates the of_flat_tree into that region, even if the fdt is already in
	* the bootmap. It also expands the size of the fdt by CONFIG_SYS_FDT_PAD
	* bytes.
	*
	* of_flat_tree and of_size are set to final (after relocation) values
	*
	* returns:
	* 0 - success
	* 1 - failure
	*/
	int boot_relocate_fdt(struct lmb lmb, char of_flat_tree, ulong of_size)
	{
	u64 start, size, usable, addr, low, mapsize;
	void fdt_blob = of_flat_tree;
	void *of_start = NULL;
	char *fdt_high;
	ulong of_len = 0;
	int bank;
	int err;
	int disable_relocation = 0;

	/* nothing to do */
	if (*of_size == 0)
	return 0;

	if (fdt_check_header(fdt_blob) != 0) {
	fdt_error("image is not a fdt");
	goto error;
	}

	/* position on a 4K boundary before the alloc_current */
	/* Pad the FDT by a specified amount */
	of_len = *of_size + CONFIG_SYS_FDT_PAD;

	/* If fdt_high is set use it to select the relocation address */
	fdt_high = env_get("fdt_high");
	if (fdt_high) {
	ulong desired_addr = hextoul(fdt_high, NULL);

	if (desired_addr == ~0UL) {
	/* All ones means use fdt in place */
	of_start = fdt_blob;
	lmb_reserve(lmb, map_to_sysmem(of_start), of_len);
	disable_relocation = 1;
	} else if (desired_addr) {
	addr = lmb_alloc_base(lmb, of_len, 0x1000,
	desired_addr);
	of_start = map_sysmem(addr, of_len);
	if (of_start == NULL) {
	puts("Failed using fdt_high value for Device Tree");
	goto error;
	}
	} else {
	addr = lmb_alloc(lmb, of_len, 0x1000);
	of_start = map_sysmem(addr, of_len);
	}
	} else {
	mapsize = env_get_bootm_mapsize();
	low = env_get_bootm_low();
	of_start = NULL;

	for (bank = 0; bank < CONFIG_NR_DRAM_BANKS; bank++) {
	start = gd->bd->bi_dram[bank].start;
	size = gd->bd->bi_dram[bank].size;

	/* DRAM bank addresses are too low, skip it. */
	if (start + size < low)
	continue;

	/*
	* At least part of this DRAM bank is usable, try
	* using the DRAM bank up to 'usable' address limit
	* for LMB allocation.
	*/
	usable = min(start + size, low + mapsize);
	addr = lmb_alloc_base(lmb, of_len, 0x1000, usable);
	of_start = map_sysmem(addr, of_len);
	/* Allocation succeeded, use this block. */
	if (of_start != NULL)
	break;

	/*
	* Reduce the mapping size in the next bank
	* by the size of attempt in current bank.
	*/
	mapsize -= usable - max(start, low);
	if (!mapsize)
	break;
	}
	}

	if (of_start == NULL) {
	puts("device tree - allocation error\n");
	goto error;
	}

	if (disable_relocation) {
	/*
	* We assume there is space after the existing fdt to use
	* for padding
	*/
	fdt_set_totalsize(of_start, of_len);
	printf(" Using Device Tree in place at %p, end %p\n",
	of_start, of_start + of_len - 1);
	} else {
	debug("## device tree at %p ... %p (len=%ld [0x%lX])\n",
	fdt_blob, fdt_blob + *of_size - 1, of_len, of_len);

	printf(" Loading Device Tree to %p, end %p ... ",
	of_start, of_start + of_len - 1);

	err = fdt_open_into(fdt_blob, of_start, of_len);
	if (err != 0) {
	fdt_error("fdt move failed");
	goto error;
	}
	puts("OK\n");
	}

	*of_flat_tree = of_start;
	*of_size = of_len;

	if (IS_ENABLED(CONFIG_CMD_FDT))
	set_working_fdt_addr(map_to_sysmem(*of_flat_tree));
	return 0;

	error:
	return 1;
	}

	/**
	* select_fdt() - Select and locate the FDT to use
	*
	* @images: pointer to the bootm images structure
	* @select: name of FDT to select, or NULL for any
	* @arch: expected FDT architecture
	* @fdt_addrp: pointer to a ulong variable, will hold FDT pointer
	* Return: 0 if OK, -ENOPKG if no FDT (but an error should not be reported),
	* other -ve value on other error
	*/

	static int select_fdt(struct bootm_headers images, const char select, u8 arch,
	ulong *fdt_addrp)
	{
	const char *buf;
	ulong fdt_addr;

	#if CONFIG_IS_ENABLED(FIT)
	const char *fit_uname_config = images->fit_uname_cfg;
	const char *fit_uname_fdt = NULL;
	ulong default_addr;
	int fdt_noffset;

	if (select) {
	/*
	* If the FDT blob comes from the FIT image and the
	* FIT image address is omitted in the command line
	* argument, try to use ramdisk or os FIT image
	* address or default load address.
	*/
	if (images->fit_uname_rd)
	default_addr = (ulong)images->fit_hdr_rd;
	else if (images->fit_uname_os)
	default_addr = (ulong)images->fit_hdr_os;
	else
	default_addr = image_load_addr;

	if (fit_parse_conf(select, default_addr, &fdt_addr,
	&fit_uname_config)) {
	debug("* fdt: config '%s' from image at 0x%08lx\n",
	fit_uname_config, fdt_addr);
	} else if (fit_parse_subimage(select, default_addr, &fdt_addr,
	&fit_uname_fdt)) {
	debug("* fdt: subimage '%s' from image at 0x%08lx\n",
	fit_uname_fdt, fdt_addr);
	} else
	#endif
	{
	fdt_addr = hextoul(select, NULL);
	debug("* fdt: cmdline image address = 0x%08lx\n",
	fdt_addr);
	}
	#if CONFIG_IS_ENABLED(FIT)
	} else {
	/* use FIT configuration provided in first bootm
	* command argument
	*/
	fdt_addr = map_to_sysmem(images->fit_hdr_os);
	fdt_noffset = fit_get_node_from_config(images, FIT_FDT_PROP,
	fdt_addr);
	if (fdt_noffset == -ENOENT)
	return -ENOPKG;
	else if (fdt_noffset < 0)
	return fdt_noffset;
	}
	#endif
	debug("## Checking for 'FDT'/'FDT Image' at %08lx\n",
	fdt_addr);

	/*
	* Check if there is an FDT image at the
	* address provided in the second bootm argument
	* check image type, for FIT images get a FIT node.
	*/
	buf = map_sysmem(fdt_addr, 0);
	switch (genimg_get_format(buf)) {
	#if CONFIG_IS_ENABLED(LEGACY_IMAGE_FORMAT)
	case IMAGE_FORMAT_LEGACY: {
	const struct legacy_img_hdr *fdt_hdr;
	ulong load, load_end;
	ulong image_start, image_data, image_end;

	/* verify fdt_addr points to a valid image header */
	printf("## Flattened Device Tree from Legacy Image at %08lx\n",
	fdt_addr);
	fdt_hdr = image_get_fdt(fdt_addr);
	if (!fdt_hdr)
	return -ENOPKG;

	/*
	* move image data to the load address,
	* make sure we don't overwrite initial image
	*/
	image_start = (ulong)fdt_hdr;
	image_data = (ulong)image_get_data(fdt_hdr);
	image_end = image_get_image_end(fdt_hdr);

	load = image_get_load(fdt_hdr);
	load_end = load + image_get_data_size(fdt_hdr);

	if (load == image_start \|\|
	load == image_data) {
	fdt_addr = load;
	break;
	}

	if ((load < image_end) && (load_end > image_start)) {
	fdt_error("fdt overwritten");
	return -EFAULT;
	}

	debug(" Loading FDT from 0x%08lx to 0x%08lx\n",
	image_data, load);

	memmove((void *)load,
	(void *)image_data,
	image_get_data_size(fdt_hdr));

	fdt_addr = load;
	break;
	}
	#endif
	case IMAGE_FORMAT_FIT:
	/*
	* This case will catch both: new uImage format
	* (libfdt based) and raw FDT blob (also libfdt
	* based).
	*/
	#if CONFIG_IS_ENABLED(FIT)
	/* check FDT blob vs FIT blob */
	if (!fit_check_format(buf, IMAGE_SIZE_INVAL)) {
	ulong load, len;

	fdt_noffset = boot_get_fdt_fit(images, fdt_addr,
	&fit_uname_fdt,
	&fit_uname_config,
	arch, &load, &len);

	if (fdt_noffset < 0)
	return -ENOENT;

	images->fit_hdr_fdt = map_sysmem(fdt_addr, 0);
	images->fit_uname_fdt = fit_uname_fdt;
	images->fit_noffset_fdt = fdt_noffset;
	fdt_addr = load;

	break;
	} else
	#endif
	{
	/*
	* FDT blob
	*/
	debug("* fdt: raw FDT blob\n");
	printf("## Flattened Device Tree blob at %08lx\n",
	(long)fdt_addr);
	}
	break;
	default:
	puts("ERROR: Did not find a cmdline Flattened Device Tree\n");
	return -ENOENT;
	}
	*fdt_addrp = fdt_addr;

	return 0;
	}

	int boot_get_fdt(void buf, const char select, uint arch,
	struct bootm_headers images, char *of_flat_tree,
	ulong *of_size)
	{
	char *fdt_blob = NULL;
	ulong fdt_addr;

	*of_flat_tree = NULL;
	*of_size = 0;

	if (select \|\| genimg_has_config(images)) {
	int ret;

	ret = select_fdt(images, select, arch, &fdt_addr);
	if (ret == -ENOPKG)
	goto no_fdt;
	else if (ret)
	return 1;
	printf(" Booting using the fdt blob at %#08lx\n", fdt_addr);
	fdt_blob = map_sysmem(fdt_addr, 0);
	} else if (images->legacy_hdr_valid &&
	image_check_type(&images->legacy_hdr_os_copy,
	IH_TYPE_MULTI)) {
	ulong fdt_data, fdt_len;

	/*
	* Now check if we have a legacy multi-component image,
	* get second entry data start address and len.
	*/
	printf("## Flattened Device Tree from multi component Image at %08lX\n",
	(ulong)images->legacy_hdr_os);

	image_multi_getimg(images->legacy_hdr_os, 2, &fdt_data,
	&fdt_len);
	if (fdt_len) {
	fdt_blob = (char *)fdt_data;
	printf(" Booting using the fdt at 0x%p\n", fdt_blob);

	if (fdt_check_header(fdt_blob) != 0) {
	fdt_error("image is not a fdt");
	goto error;
	}

	if (fdt_totalsize(fdt_blob) != fdt_len) {
	fdt_error("fdt size != image size");
	goto error;
	}
	} else {
	debug("## No Flattened Device Tree\n");
	goto no_fdt;
	}
	#ifdef CONFIG_ANDROID_BOOT_IMAGE
	} else if (genimg_get_format(buf) == IMAGE_FORMAT_ANDROID) {
	void *hdr = buf;
	ulong fdt_data, fdt_len;
	u32 fdt_size, dtb_idx;
	/*
	* Firstly check if this android boot image has dtb field.
	*/
	dtb_idx = (u32)env_get_ulong("adtb_idx", 10, 0);
	if (android_image_get_dtb_by_index((ulong)hdr, 0,
	dtb_idx, &fdt_addr, &fdt_size)) {
	fdt_blob = (char *)map_sysmem(fdt_addr, 0);
	if (fdt_check_header(fdt_blob))
	goto no_fdt;

	debug("## Using FDT in Android image dtb area with idx %u\n", dtb_idx);
	} else if (!android_image_get_second(hdr, &fdt_data, &fdt_len) &&
	!fdt_check_header((char *)fdt_data)) {
	fdt_blob = (char *)fdt_data;
	if (fdt_totalsize(fdt_blob) != fdt_len)
	goto error;

	debug("## Using FDT in Android image second area\n");
	} else {
	fdt_addr = env_get_hex("fdtaddr", 0);
	if (!fdt_addr)
	goto no_fdt;

	fdt_blob = map_sysmem(fdt_addr, 0);
	if (fdt_check_header(fdt_blob))
	goto no_fdt;

	debug("## Using FDT at ${fdtaddr}=Ox%lx\n", fdt_addr);
	}
	#endif
	} else {
	debug("## No Flattened Device Tree\n");
	goto no_fdt;
	}

	*of_flat_tree = fdt_blob;
	*of_size = fdt_totalsize(fdt_blob);
	debug(" of_flat_tree at 0x%08lx size 0x%08lx\n",
	(ulong)of_flat_tree, of_size);

	return 0;

	no_fdt:
	debug("Continuing to boot without FDT\n");
	return 0;
	error:
	return 1;
	}

	/*
	* Verify the device tree.
	*
	* This function is called after all device tree fix-ups have been enacted,
	* so that the final device tree can be verified. The definition of "verified"
	* is up to the specific implementation. However, it generally means that the
	* addresses of some of the devices in the device tree are compared with the
	* actual addresses at which U-Boot has placed them.
	*
	* Returns 1 on success, 0 on failure. If 0 is returned, U-Boot will halt the
	* boot process.
	*/
	__weak int ft_verify_fdt(void *fdt)
	{
	return 1;
	}

	__weak int arch_fixup_fdt(void *blob)
	{
	return 0;
	}

	int image_setup_libfdt(struct bootm_headers images, void blob,
	struct lmb *lmb)
	{
	ulong *initrd_start = &images->initrd_start;
	ulong *initrd_end = &images->initrd_end;
	int ret, fdt_ret, of_size;

	if (IS_ENABLED(CONFIG_OF_ENV_SETUP)) {
	const char *fdt_fixup;

	fdt_fixup = env_get("fdt_fixup");
	if (fdt_fixup) {
	set_working_fdt_addr(map_to_sysmem(blob));
	ret = run_command_list(fdt_fixup, -1, 0);
	if (ret)
	printf("WARNING: fdt_fixup command returned %d\n",
	ret);
	}
	}

	ret = -EPERM;

	if (fdt_root(blob) < 0) {
	printf("ERROR: root node setup failed\n");
	goto err;
	}
	if (fdt_chosen(blob) < 0) {
	printf("ERROR: /chosen node create failed\n");
	goto err;
	}
	if (arch_fixup_fdt(blob) < 0) {
	printf("ERROR: arch-specific fdt fixup failed\n");
	goto err;
	}

	fdt_ret = optee_copy_fdt_nodes(blob);
	if (fdt_ret) {
	printf("ERROR: transfer of optee nodes to new fdt failed: %s\n",
	fdt_strerror(fdt_ret));
	goto err;
	}

	/* Store name of configuration node as u-boot,bootconf in /chosen node */
	if (images->fit_uname_cfg)
	fdt_find_and_setprop(blob, "/chosen", "u-boot,bootconf",
	images->fit_uname_cfg,
	strlen(images->fit_uname_cfg) + 1, 1);

	/* Update ethernet nodes */
	fdt_fixup_ethernet(blob);
	#if IS_ENABLED(CONFIG_CMD_PSTORE)
	/* Append PStore configuration */
	fdt_fixup_pstore(blob);
	#endif
	if (IS_ENABLED(CONFIG_OF_BOARD_SETUP)) {
	const char *skip_board_fixup;

	skip_board_fixup = env_get("skip_board_fixup");
	if (skip_board_fixup && ((int)simple_strtol(skip_board_fixup, NULL, 10) == 1)) {
	printf("skip board fdt fixup\n");
	} else {
	fdt_ret = ft_board_setup(blob, gd->bd);
	if (fdt_ret) {
	printf("ERROR: board-specific fdt fixup failed: %s\n",
	fdt_strerror(fdt_ret));
	goto err;
	}
	}
	}
	if (IS_ENABLED(CONFIG_OF_SYSTEM_SETUP)) {
	fdt_ret = ft_system_setup(blob, gd->bd);
	if (fdt_ret) {
	printf("ERROR: system-specific fdt fixup failed: %s\n",
	fdt_strerror(fdt_ret));
	goto err;
	}
	}

	if (fdt_initrd(blob, initrd_start, initrd_end))
	goto err;

	if (!ft_verify_fdt(blob))
	goto err;

	/* after here we are using a livetree */
	if (!of_live_active() && CONFIG_IS_ENABLED(EVENT)) {
	struct event_ft_fixup fixup;

	fixup.tree = oftree_from_fdt(blob);
	fixup.images = images;
	if (oftree_valid(fixup.tree)) {
	ret = event_notify(EVT_FT_FIXUP, &fixup, sizeof(fixup));
	if (ret) {
	printf("ERROR: fdt fixup event failed: %d\n",
	ret);
	goto err;
	}
	}
	}

	/* Delete the old LMB reservation */
	if (lmb)
	lmb_free(lmb, map_to_sysmem(blob), fdt_totalsize(blob));

	ret = fdt_shrink_to_minimum(blob, 0);
	if (ret < 0)
	goto err;
	of_size = ret;

	/* Create a new LMB reservation */
	if (lmb)
	lmb_reserve(lmb, map_to_sysmem(blob), of_size);

	#if defined(CONFIG_ARCH_KEYSTONE)
	if (IS_ENABLED(CONFIG_OF_BOARD_SETUP))
	ft_board_setup_ex(blob, gd->bd);
	#endif

	return 0;
	err:
	printf(" - must RESET the board to recover.\n\n");

	return ret;
	}