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

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

#include <common.h>
#include <fdt_support.h>
#include <errno.h>
#include <image.h>
#include <libfdt.h>
#include <mapmem.h>
#include <asm/io.h>

#ifndef CONFIG_SYS_FDT_PAD
#define CONFIG_SYS_FDT_PAD 0x3000
#endif

DECLARE_GLOBAL_DATA_PTR;

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

#if defined(CONFIG_IMAGE_FORMAT_LEGACY)
static const image_header_t *image_get_fdt(ulong fdt_addr)
{
	const image_header_t *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

/**
 * boot_fdt_add_mem_rsv_regions - Mark the memreserve sections as unusable
 * @lmb: pointer to lmb handle, will be used for memory mgmt
 * @fdt_blob: pointer to fdt blob base address
 *
 * Adds the memreserve 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;

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

	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;
		printf("   reserving fdt memory region: addr=%llx size=%llx\n",
		       (unsigned long long)addr, (unsigned long long)size);
		lmb_reserve(lmb, addr, size);
	}
}

/**
 * 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)
{
	void	*fdt_blob = *of_flat_tree;
	void	*of_start = NULL;
	char	*fdt_high;
	ulong	of_len = 0;
	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 = getenv("fdt_high");
	if (fdt_high) {
		void *desired_addr = (void *)simple_strtoul(fdt_high, NULL, 16);

		if (((ulong) desired_addr) == ~0UL) {
			/* All ones means use fdt in place */
			of_start = fdt_blob;
			lmb_reserve(lmb, (ulong)of_start, of_len);
			disable_relocation = 1;
		} else if (desired_addr) {
			of_start =
			    (void *)(ulong) lmb_alloc_base(lmb, of_len, 0x1000,
							   (ulong)desired_addr);
			if (of_start == NULL) {
				puts("Failed using fdt_high value for Device Tree");
				goto error;
			}
		} else {
			of_start =
			    (void *)(ulong) lmb_alloc(lmb, of_len, 0x1000);
		}
	} else {
		of_start =
		    (void *)(ulong) lmb_alloc_base(lmb, of_len, 0x1000,
						   getenv_bootm_mapsize()
						   + getenv_bootm_low());
	}

	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;

	set_working_fdt_addr((ulong)*of_flat_tree);
	return 0;

error:
	return 1;
}

/**
 * boot_get_fdt - main fdt handling routine
 * @argc: command argument count
 * @argv: command argument list
 * @arch: architecture (IH_ARCH_...)
 * @images: pointer to the bootm images structure
 * @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_get_fdt() is responsible for finding a valid flat device tree image.
 * Curently supported are the following ramdisk sources:
 *      - multicomponent kernel/ramdisk image,
 *      - commandline provided address of decicated ramdisk image.
 *
 * returns:
 *     0, if fdt image was found and valid, or skipped
 *     of_flat_tree and of_size are set to fdt start address and length if
 *     fdt image is found and valid
 *
 *     1, if fdt image is found but corrupted
 *     of_flat_tree and of_size are set to 0 if no fdt exists
 */
int boot_get_fdt(int flag, int argc, char * const argv[], uint8_t arch,
		bootm_headers_t *images, char **of_flat_tree, ulong *of_size)
{
#if defined(CONFIG_IMAGE_FORMAT_LEGACY)
	const image_header_t *fdt_hdr;
	ulong		load, load_end;
	ulong		image_start, image_data, image_end;
#endif
	ulong		fdt_addr;
	char		*fdt_blob = NULL;
	void		*buf;
#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;
#endif
	const char *select = NULL;
	int		ok_no_fdt = 0;

	*of_flat_tree = NULL;
	*of_size = 0;

	if (argc > 2)
		select = argv[2];
	if (select || genimg_has_config(images)) {
#if CONFIG_IS_ENABLED(FIT)
		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 = 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 = simple_strtoul(select, NULL, 16);
				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 == -ENOLINK)
				return 0;
			else if (fdt_noffset < 0)
				return 1;
		}
#endif
		debug("## Checking for 'FDT'/'FDT Image' at %08lx\n",
		      fdt_addr);

		/* copy from dataflash if needed */
		fdt_addr = genimg_get_image(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 defined(CONFIG_IMAGE_FORMAT_LEGACY)
		case IMAGE_FORMAT_LEGACY:
			/* 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)
				goto no_fdt;

			/*
			 * 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");
				goto error;
			}

			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)) {
				ulong load, len;

				fdt_noffset = fit_image_load(images,
					fdt_addr, &fit_uname_fdt,
					&fit_uname_config,
					arch, IH_TYPE_FLATDT,
					BOOTSTAGE_ID_FIT_FDT_START,
					FIT_LOAD_OPTIONAL, &load, &len);

				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");
			goto no_fdt;
		}

		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;
		}
	} 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:
	ok_no_fdt = 1;
error:
	*of_flat_tree = NULL;
	*of_size = 0;
	if (!select && ok_no_fdt) {
		debug("Continuing to boot without FDT\n");
		return 0;
	}
	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(bootm_headers_t *images, void *blob,
		       int of_size, struct lmb *lmb)
{
	ulong *initrd_start = &images->initrd_start;
	ulong *initrd_end = &images->initrd_end;
	int ret = -EPERM;
	int fdt_ret;

	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;
	}
	if (IMAGE_OF_BOARD_SETUP) {
		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 (IMAGE_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;
		}
	}
	fdt_fixup_ethernet(blob);

	/* Delete the old LMB reservation */
	lmb_free(lmb, (phys_addr_t)(u32)(uintptr_t)blob,
		 (phys_size_t)fdt_totalsize(blob));

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

	if (*initrd_start && *initrd_end) {
		of_size += FDT_RAMDISK_OVERHEAD;
		fdt_set_totalsize(blob, of_size);
	}
	/* Create a new LMB reservation */
	lmb_reserve(lmb, (ulong)blob, of_size);

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

#if defined(CONFIG_SOC_KEYSTONE)
	if (IMAGE_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;
}
Commit	Line	Data
44d3a306 SG	1	/*
	2	* Copyright (c) 2013, Google Inc.
	3	*
	4	* (C) Copyright 2008 Semihalf
	5	*
	6	* (C) Copyright 2000-2006
	7	* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
	8	*
1a459660	9	* SPDX-License-Identifier: GPL-2.0+
44d3a306 SG	10	*/
	11
	12	#include <common.h>
	13	#include <fdt_support.h>
	14	#include <errno.h>
	15	#include <image.h>
	16	#include <libfdt.h>
0eb25b61	17	#include <mapmem.h>
44d3a306 SG	18	#include <asm/io.h>
	19
	20	#ifndef CONFIG_SYS_FDT_PAD
	21	#define CONFIG_SYS_FDT_PAD 0x3000
	22	#endif
	23
	24	DECLARE_GLOBAL_DATA_PTR;
	25
	26	static void fdt_error(const char *msg)
	27	{
	28	puts("ERROR: ");
	29	puts(msg);
	30	puts(" - must RESET the board to recover.\n");
	31	}
	32
21d29f7f	33	#if defined(CONFIG_IMAGE_FORMAT_LEGACY)
44d3a306 SG	34	static const image_header_t *image_get_fdt(ulong fdt_addr)
	35	{
	36	const image_header_t *fdt_hdr = map_sysmem(fdt_addr, 0);
	37
	38	image_print_contents(fdt_hdr);
	39
	40	puts(" Verifying Checksum ... ");
	41	if (!image_check_hcrc(fdt_hdr)) {
	42	fdt_error("fdt header checksum invalid");
	43	return NULL;
	44	}
	45
	46	if (!image_check_dcrc(fdt_hdr)) {
	47	fdt_error("fdt checksum invalid");
	48	return NULL;
	49	}
	50	puts("OK\n");
	51
	52	if (!image_check_type(fdt_hdr, IH_TYPE_FLATDT)) {
	53	fdt_error("uImage is not a fdt");
	54	return NULL;
	55	}
	56	if (image_get_comp(fdt_hdr) != IH_COMP_NONE) {
	57	fdt_error("uImage is compressed");
	58	return NULL;
	59	}
2f0877c7	60	if (fdt_check_header((void *)image_get_data(fdt_hdr)) != 0) {
44d3a306 SG	61	fdt_error("uImage data is not a fdt");
	62	return NULL;
	63	}
	64	return fdt_hdr;
	65	}
21d29f7f	66	#endif
44d3a306 SG	67
	68	/**
	69	* boot_fdt_add_mem_rsv_regions - Mark the memreserve sections as unusable
	70	* @lmb: pointer to lmb handle, will be used for memory mgmt
	71	* @fdt_blob: pointer to fdt blob base address
	72	*
	73	* Adds the memreserve regions in the dtb to the lmb block. Adding the
	74	* memreserve regions prevents u-boot from using them to store the initrd
	75	* or the fdt blob.
	76	*/
	77	void boot_fdt_add_mem_rsv_regions(struct lmb lmb, void fdt_blob)
	78	{
	79	uint64_t addr, size;
	80	int i, total;
	81
	82	if (fdt_check_header(fdt_blob) != 0)
	83	return;
	84
	85	total = fdt_num_mem_rsv(fdt_blob);
	86	for (i = 0; i < total; i++) {
	87	if (fdt_get_mem_rsv(fdt_blob, i, &addr, &size) != 0)
	88	continue;
	89	printf(" reserving fdt memory region: addr=%llx size=%llx\n",
	90	(unsigned long long)addr, (unsigned long long)size);
	91	lmb_reserve(lmb, addr, size);
	92	}
	93	}
	94
	95	/**
	96	* boot_relocate_fdt - relocate flat device tree
	97	* @lmb: pointer to lmb handle, will be used for memory mgmt
	98	* @of_flat_tree: pointer to a char* variable, will hold fdt start address
	99	* @of_size: pointer to a ulong variable, will hold fdt length
	100	*
	101	* boot_relocate_fdt() allocates a region of memory within the bootmap and
	102	* relocates the of_flat_tree into that region, even if the fdt is already in
	103	* the bootmap. It also expands the size of the fdt by CONFIG_SYS_FDT_PAD
	104	* bytes.
	105	*
	106	* of_flat_tree and of_size are set to final (after relocation) values
	107	*
	108	* returns:
	109	* 0 - success
	110	* 1 - failure
	111	*/
	112	int boot_relocate_fdt(struct lmb lmb, char of_flat_tree, ulong of_size)
	113	{
	114	void fdt_blob = of_flat_tree;
	115	void *of_start = NULL;
	116	char *fdt_high;
	117	ulong of_len = 0;
	118	int err;
	119	int disable_relocation = 0;
	120
	121	/* nothing to do */
	122	if (*of_size == 0)
	123	return 0;
	124
	125	if (fdt_check_header(fdt_blob) != 0) {
	126	fdt_error("image is not a fdt");
	127	goto error;
	128	}
	129
	130	/* position on a 4K boundary before the alloc_current */
131	/* Pad the FDT by a specified amount */
132	of_len = *of_size + CONFIG_SYS_FDT_PAD;
133
134	/* If fdt_high is set use it to select the relocation address */
135	fdt_high = getenv("fdt_high");
136	if (fdt_high) {
137	void desired_addr = (void )simple_strtoul(fdt_high, NULL, 16);
138
139	if (((ulong) desired_addr) == ~0UL) {
140	/* All ones means use fdt in place */
141	of_start = fdt_blob;
142	lmb_reserve(lmb, (ulong)of_start, of_len);
143	disable_relocation = 1;
144	} else if (desired_addr) {
145	of_start =
146	(void *)(ulong) lmb_alloc_base(lmb, of_len, 0x1000,
147	(ulong)desired_addr);
148	if (of_start == NULL) {
149	puts("Failed using fdt_high value for Device Tree");
150	goto error;
151	}
152	} else {
153	of_start =
154	(void *)(ulong) lmb_alloc(lmb, of_len, 0x1000);
155	}
156	} else {
157	of_start =
158	(void *)(ulong) lmb_alloc_base(lmb, of_len, 0x1000,
159	getenv_bootm_mapsize()
160	+ getenv_bootm_low());
161	}
162
163	if (of_start == NULL) {
164	puts("device tree - allocation error\n");
165	goto error;
166	}
167
168	if (disable_relocation) {
169	/*
170	* We assume there is space after the existing fdt to use
171	* for padding
172	*/
173	fdt_set_totalsize(of_start, of_len);
174	printf(" Using Device Tree in place at %p, end %p\n",
175	of_start, of_start + of_len - 1);
176	} else {
177	debug("## device tree at %p ... %p (len=%ld [0x%lX])\n",
178	fdt_blob, fdt_blob + *of_size - 1, of_len, of_len);
179
180	printf(" Loading Device Tree to %p, end %p ... ",
181	of_start, of_start + of_len - 1);
182
183	err = fdt_open_into(fdt_blob, of_start, of_len);
184	if (err != 0) {
185	fdt_error("fdt move failed");
186	goto error;
187	}
188	puts("OK\n");
189	}
190
191	*of_flat_tree = of_start;
192	*of_size = of_len;
193
90fbee3e	194	set_working_fdt_addr((ulong)*of_flat_tree);
44d3a306 SG	195	return 0;
	196
	197	error:
	198	return 1;
	199	}
	200
44d3a306 SG	201	/**
	202	* boot_get_fdt - main fdt handling routine
	203	* @argc: command argument count
	204	* @argv: command argument list
53f375fa	205	* @arch: architecture (IH_ARCH_...)
44d3a306 SG	206	* @images: pointer to the bootm images structure
	207	* @of_flat_tree: pointer to a char* variable, will hold fdt start address
	208	* @of_size: pointer to a ulong variable, will hold fdt length
	209	*
	210	* boot_get_fdt() is responsible for finding a valid flat device tree image.
	211	* Curently supported are the following ramdisk sources:
	212	* - multicomponent kernel/ramdisk image,
	213	* - commandline provided address of decicated ramdisk image.
	214	*
	215	* returns:
	216	* 0, if fdt image was found and valid, or skipped
	217	* of_flat_tree and of_size are set to fdt start address and length if
	218	* fdt image is found and valid
	219	*
	220	* 1, if fdt image is found but corrupted
	221	* of_flat_tree and of_size are set to 0 if no fdt exists
	222	*/
53f375fa	223	int boot_get_fdt(int flag, int argc, char * const argv[], uint8_t arch,
44d3a306 SG	224	bootm_headers_t images, char of_flat_tree, ulong of_size)
44d3a306 SG	225	{
21d29f7f	226	#if defined(CONFIG_IMAGE_FORMAT_LEGACY)
44d3a306	227	const image_header_t *fdt_hdr;
21d29f7f HS	228	ulong load, load_end;
	229	ulong image_start, image_data, image_end;
	230	#endif
44d3a306 SG	231	ulong fdt_addr;
44d3a306 SG	232	char *fdt_blob = NULL;
44d3a306	233	void *buf;
73223f0e	234	#if CONFIG_IS_ENABLED(FIT)
f320a4d8	235	const char *fit_uname_config = images->fit_uname_cfg;
44d3a306 SG	236	const char *fit_uname_fdt = NULL;
44d3a306 SG	237	ulong default_addr;
44d3a306	238	int fdt_noffset;
44d3a306	239	#endif
983c72f4	240	const char *select = NULL;
48aead71	241	int ok_no_fdt = 0;
44d3a306 SG	242
	243	*of_flat_tree = NULL;
	244	*of_size = 0;
	245
983c72f4 SG	246	if (argc > 2)
	247	select = argv[2];
	248	if (select \|\| genimg_has_config(images)) {
73223f0e	249	#if CONFIG_IS_ENABLED(FIT)
983c72f4	250	if (select) {
44d3a306 SG	251	/*
	252	* If the FDT blob comes from the FIT image and the
	253	* FIT image address is omitted in the command line
	254	* argument, try to use ramdisk or os FIT image
	255	* address or default load address.
	256	*/
	257	if (images->fit_uname_rd)
	258	default_addr = (ulong)images->fit_hdr_rd;
	259	else if (images->fit_uname_os)
	260	default_addr = (ulong)images->fit_hdr_os;
	261	else
	262	default_addr = load_addr;
	263
983c72f4	264	if (fit_parse_conf(select, default_addr,
44d3a306 SG	265	&fdt_addr, &fit_uname_config)) {
	266	debug("* fdt: config '%s' from image at 0x%08lx\n",
	267	fit_uname_config, fdt_addr);
983c72f4	268	} else if (fit_parse_subimage(select, default_addr,
44d3a306 SG	269	&fdt_addr, &fit_uname_fdt)) {
	270	debug("* fdt: subimage '%s' from image at 0x%08lx\n",
	271	fit_uname_fdt, fdt_addr);
	272	} else
	273	#endif
	274	{
983c72f4	275	fdt_addr = simple_strtoul(select, NULL, 16);
44d3a306 SG	276	debug("* fdt: cmdline image address = 0x%08lx\n",
	277	fdt_addr);
	278	}
73223f0e	279	#if CONFIG_IS_ENABLED(FIT)
44d3a306 SG	280	} else {
	281	/* use FIT configuration provided in first bootm
	282	* command argument
	283	*/
	284	fdt_addr = map_to_sysmem(images->fit_hdr_os);
53f375fa SG	285	fdt_noffset = fit_get_node_from_config(images,
	286	FIT_FDT_PROP,
	287	fdt_addr);
	288	if (fdt_noffset == -ENOLINK)
44d3a306	289	return 0;
53f375fa SG	290	else if (fdt_noffset < 0)
53f375fa SG	291	return 1;
44d3a306 SG	292	}
44d3a306 SG	293	#endif
44d3a306 SG	294	debug("## Checking for 'FDT'/'FDT Image' at %08lx\n",
	295	fdt_addr);
	296
	297	/* copy from dataflash if needed */
	298	fdt_addr = genimg_get_image(fdt_addr);
	299
	300	/*
	301	* Check if there is an FDT image at the
	302	* address provided in the second bootm argument
	303	* check image type, for FIT images get a FIT node.
	304	*/
	305	buf = map_sysmem(fdt_addr, 0);
	306	switch (genimg_get_format(buf)) {
21d29f7f	307	#if defined(CONFIG_IMAGE_FORMAT_LEGACY)
44d3a306 SG	308	case IMAGE_FORMAT_LEGACY:
	309	/* verify fdt_addr points to a valid image header */
	310	printf("## Flattened Device Tree from Legacy Image at %08lx\n",
	311	fdt_addr);
	312	fdt_hdr = image_get_fdt(fdt_addr);
	313	if (!fdt_hdr)
48aead71	314	goto no_fdt;
44d3a306 SG	315
	316	/*
	317	* move image data to the load address,
	318	* make sure we don't overwrite initial image
	319	*/
	320	image_start = (ulong)fdt_hdr;
	321	image_data = (ulong)image_get_data(fdt_hdr);
	322	image_end = image_get_image_end(fdt_hdr);
	323
53f375fa SG	324	load = image_get_load(fdt_hdr);
53f375fa SG	325	load_end = load + image_get_data_size(fdt_hdr);
44d3a306	326
53f375fa SG	327	if (load == image_start \|\|
53f375fa SG	328	load == image_data) {
2ea47be0	329	fdt_addr = load;
44d3a306 SG	330	break;
	331	}
	332
53f375fa	333	if ((load < image_end) && (load_end > image_start)) {
44d3a306 SG	334	fdt_error("fdt overwritten");
	335	goto error;
	336	}
	337
	338	debug(" Loading FDT from 0x%08lx to 0x%08lx\n",
53f375fa	339	image_data, load);
44d3a306	340
53f375fa	341	memmove((void *)load,
44d3a306 SG	342	(void *)image_data,
	343	image_get_data_size(fdt_hdr));
	344
53f375fa	345	fdt_addr = load;
44d3a306	346	break;
21d29f7f	347	#endif
44d3a306 SG	348	case IMAGE_FORMAT_FIT:
	349	/*
	350	* This case will catch both: new uImage format
	351	* (libfdt based) and raw FDT blob (also libfdt
	352	* based).
	353	*/
73223f0e	354	#if CONFIG_IS_ENABLED(FIT)
44d3a306 SG	355	/* check FDT blob vs FIT blob */
44d3a306 SG	356	if (fit_check_format(buf)) {
53f375fa	357	ulong load, len;
44d3a306	358
53f375fa	359	fdt_noffset = fit_image_load(images,
53f375fa	360	fdt_addr, &fit_uname_fdt,
f320a4d8	361	&fit_uname_config,
53f375fa SG	362	arch, IH_TYPE_FLATDT,
	363	BOOTSTAGE_ID_FIT_FDT_START,
	364	FIT_LOAD_OPTIONAL, &load, &len);
44d3a306	365
53f375fa	366	images->fit_hdr_fdt = map_sysmem(fdt_addr, 0);
44d3a306 SG	367	images->fit_uname_fdt = fit_uname_fdt;
44d3a306 SG	368	images->fit_noffset_fdt = fdt_noffset;
53f375fa	369	fdt_addr = load;
44d3a306 SG	370	break;
	371	} else
	372	#endif
	373	{
	374	/*
	375	* FDT blob
	376	*/
44d3a306 SG	377	debug("* fdt: raw FDT blob\n");
	378	printf("## Flattened Device Tree blob at %08lx\n",
	379	(long)fdt_addr);
	380	}
	381	break;
	382	default:
	383	puts("ERROR: Did not find a cmdline Flattened Device Tree\n");
48aead71	384	goto no_fdt;
44d3a306 SG	385	}
44d3a306 SG	386
53f375fa SG	387	printf(" Booting using the fdt blob at %#08lx\n", fdt_addr);
53f375fa SG	388	fdt_blob = map_sysmem(fdt_addr, 0);
44d3a306 SG	389	} else if (images->legacy_hdr_valid &&
	390	image_check_type(&images->legacy_hdr_os_copy,
	391	IH_TYPE_MULTI)) {
	392	ulong fdt_data, fdt_len;
	393
	394	/*
	395	* Now check if we have a legacy multi-component image,
	396	* get second entry data start address and len.
	397	*/
	398	printf("## Flattened Device Tree from multi component Image at %08lX\n",
	399	(ulong)images->legacy_hdr_os);
	400
	401	image_multi_getimg(images->legacy_hdr_os, 2, &fdt_data,
	402	&fdt_len);
	403	if (fdt_len) {
	404	fdt_blob = (char *)fdt_data;
	405	printf(" Booting using the fdt at 0x%p\n", fdt_blob);
	406
	407	if (fdt_check_header(fdt_blob) != 0) {
	408	fdt_error("image is not a fdt");
	409	goto error;
	410	}
	411
	412	if (fdt_totalsize(fdt_blob) != fdt_len) {
	413	fdt_error("fdt size != image size");
	414	goto error;
	415	}
	416	} else {
	417	debug("## No Flattened Device Tree\n");
48aead71	418	goto no_fdt;
44d3a306 SG	419	}
	420	} else {
	421	debug("## No Flattened Device Tree\n");
48aead71	422	goto no_fdt;
44d3a306 SG	423	}
	424
	425	*of_flat_tree = fdt_blob;
	426	*of_size = fdt_totalsize(fdt_blob);
	427	debug(" of_flat_tree at 0x%08lx size 0x%08lx\n",
	428	(ulong)of_flat_tree, of_size);
	429
	430	return 0;
	431
48aead71 SR	432	no_fdt:
48aead71 SR	433	ok_no_fdt = 1;
44d3a306 SG	434	error:
	435	*of_flat_tree = NULL;
	436	*of_size = 0;
48aead71 SR	437	if (!select && ok_no_fdt) {
	438	debug("Continuing to boot without FDT\n");
	439	return 0;
	440	}
44d3a306 SG	441	return 1;
44d3a306 SG	442	}
13d06981 SG	443
	444	/*
	445	* Verify the device tree.
	446	*
	447	* This function is called after all device tree fix-ups have been enacted,
	448	* so that the final device tree can be verified. The definition of "verified"
	449	* is up to the specific implementation. However, it generally means that the
	450	* addresses of some of the devices in the device tree are compared with the
	451	* actual addresses at which U-Boot has placed them.
	452	*
a187559e	453	* Returns 1 on success, 0 on failure. If 0 is returned, U-Boot will halt the
13d06981 SG	454	* boot process.
	455	*/
	456	__weak int ft_verify_fdt(void *fdt)
	457	{
	458	return 1;
	459	}
	460
e29607ed	461	__weak int arch_fixup_fdt(void *blob)
13d06981 SG	462	{
	463	return 0;
	464	}
	465
	466	int image_setup_libfdt(bootm_headers_t images, void blob,
	467	int of_size, struct lmb *lmb)
	468	{
	469	ulong *initrd_start = &images->initrd_start;
	470	ulong *initrd_end = &images->initrd_end;
6f4dbc21 SG	471	int ret = -EPERM;
6f4dbc21 SG	472	int fdt_ret;
13d06981	473
10be5b5d PK	474	if (fdt_root(blob) < 0) {
	475	printf("ERROR: root node setup failed\n");
	476	goto err;
	477	}
bc6ed0f9	478	if (fdt_chosen(blob) < 0) {
6f4dbc21 SG	479	printf("ERROR: /chosen node create failed\n");
6f4dbc21 SG	480	goto err;
13d06981	481	}
e29607ed	482	if (arch_fixup_fdt(blob) < 0) {
6f4dbc21 SG	483	printf("ERROR: arch-specific fdt fixup failed\n");
	484	goto err;
	485	}
	486	if (IMAGE_OF_BOARD_SETUP) {
	487	fdt_ret = ft_board_setup(blob, gd->bd);
	488	if (fdt_ret) {
	489	printf("ERROR: board-specific fdt fixup failed: %s\n",
	490	fdt_strerror(fdt_ret));
	491	goto err;
	492	}
e29607ed	493	}
c654b517	494	if (IMAGE_OF_SYSTEM_SETUP) {
d89212b7 MK	495	fdt_ret = ft_system_setup(blob, gd->bd);
d89212b7 MK	496	if (fdt_ret) {
c654b517 SG	497	printf("ERROR: system-specific fdt fixup failed: %s\n",
	498	fdt_strerror(fdt_ret));
	499	goto err;
	500	}
	501	}
13d06981 SG	502	fdt_fixup_ethernet(blob);
	503
	504	/* Delete the old LMB reservation */
	505	lmb_free(lmb, (phys_addr_t)(u32)(uintptr_t)blob,
	506	(phys_size_t)fdt_totalsize(blob));
	507
5bf58ccc	508	ret = fdt_shrink_to_minimum(blob);
13d06981	509	if (ret < 0)
6f4dbc21	510	goto err;
13d06981 SG	511	of_size = ret;
	512
	513	if (initrd_start && initrd_end) {
	514	of_size += FDT_RAMDISK_OVERHEAD;
	515	fdt_set_totalsize(blob, of_size);
	516	}
	517	/* Create a new LMB reservation */
	518	lmb_reserve(lmb, (ulong)blob, of_size);
	519
dbe963ae	520	fdt_initrd(blob, initrd_start, initrd_end);
13d06981	521	if (!ft_verify_fdt(blob))
6f4dbc21	522	goto err;
13d06981	523
7c387646	524	#if defined(CONFIG_SOC_KEYSTONE)
00c200f1 VA	525	if (IMAGE_OF_BOARD_SETUP)
	526	ft_board_setup_ex(blob, gd->bd);
	527	#endif
	528
13d06981	529	return 0;
6f4dbc21 SG	530	err:
	531	printf(" - must RESET the board to recover.\n\n");
	532
	533	return ret;
13d06981	534	}