bootm: refactor fdt locating and relocation code

Move the code that handles finding a device tree blob and relocating
it (if needed) into common code so all arch's have access to it.

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>

4 files changed, 533 insertions, 484 deletions

diff --git a/common/cmd_bootm.c b/common/cmd_bootm.c
index 56236b9..9a745f1 100644
--- a/common/cmd_bootm.c
+++ b/common/cmd_bootm.c
@@ -258,6 +258,16 @@ int do_bootm (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
 			puts ("Ramdisk image is corrupt\n");
 			return 1;
 		}
+
+#if defined(CONFIG_OF_LIBFDT)
+		/* find flattened device tree */
+		ret = boot_get_fdt (flag, argc, argv, &images,
+				    &images.ft_addr, &images.ft_len);
+		if (ret) {
+			puts ("Could not find a valid device tree\n");
+			return 1;
+		}
+#endif
 	}
 
 	image_start = (ulong)os_hdr;
diff --git a/common/image.c b/common/image.c
index 6d2ce32..18d667d 100644
--- a/common/image.c
+++ b/common/image.c
@@ -1070,6 +1070,508 @@ error:
 	return -1;
 }
 
+#ifdef CONFIG_OF_LIBFDT
+static void fdt_error (const char *msg)
+{
+	puts ("ERROR: ");
+	puts (msg);
+	puts (" - must RESET the board to recover.\n");
+}
+
+static image_header_t *image_get_fdt (ulong fdt_addr)
+{
+	image_header_t *fdt_hdr = (image_header_t *)fdt_addr;
+
+	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 ((char *)image_get_data (fdt_hdr)) != 0) {
+		fdt_error ("uImage data is not a fdt");
+		return NULL;
+	}
+	return fdt_hdr;
+}
+
+/**
+ * fit_check_fdt - verify FIT format FDT subimage
+ * @fit_hdr: pointer to the FIT  header
+ * fdt_noffset: FDT subimage node offset within FIT image
+ * @verify: data CRC verification flag
+ *
+ * fit_check_fdt() verifies integrity of the FDT subimage and from
+ * specified FIT image.
+ *
+ * returns:
+ *     1, on success
+ *     0, on failure
+ */
+#if defined(CONFIG_FIT)
+static int fit_check_fdt (const void *fit, int fdt_noffset, int verify)
+{
+	fit_image_print (fit, fdt_noffset, "   ");
+
+	if (verify) {
+		puts ("   Verifying Hash Integrity ... ");
+		if (!fit_image_check_hashes (fit, fdt_noffset)) {
+			fdt_error ("Bad Data Hash");
+			return 0;
+		}
+		puts ("OK\n");
+	}
+
+	if (!fit_image_check_type (fit, fdt_noffset, IH_TYPE_FLATDT)) {
+		fdt_error ("Not a FDT image");
+		return 0;
+	}
+
+	if (!fit_image_check_comp (fit, fdt_noffset, IH_COMP_NONE)) {
+		fdt_error ("FDT image is compressed");
+		return 0;
+	}
+
+	return 1;
+}
+#endif /* CONFIG_FIT */
+
+#ifndef CFG_FDT_PAD
+#define CFG_FDT_PAD 0x3000
+#endif
+
+/**
+ * boot_relocate_fdt - relocate flat device tree
+ * @lmb: pointer to lmb handle, will be used for memory mgmt
+ * @bootmap_base: base address of the bootmap region
+ * @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() determines if the of_flat_tree address is within
+ * the bootmap and if not relocates it into that region
+ *
+ * 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, ulong bootmap_base,
+		char **of_flat_tree, ulong *of_size)
+{
+	char	*fdt_blob = *of_flat_tree;
+	ulong	relocate = 0;
+	ulong	of_len = 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;
+	}
+
+#ifndef CFG_NO_FLASH
+	/* move the blob if it is in flash (set relocate) */
+	if (addr2info ((ulong)fdt_blob) != NULL)
+		relocate = 1;
+#endif
+
+	/*
+	 * The blob needs to be inside the boot mapping.
+	 */
+	if (fdt_blob < (char *)bootmap_base)
+		relocate = 1;
+
+	if ((fdt_blob + *of_size + CFG_FDT_PAD) >=
+			((char *)CFG_BOOTMAPSZ + bootmap_base))
+		relocate = 1;
+
+	/* move flattend device tree if needed */
+	if (relocate) {
+		int err;
+		ulong of_start = 0;
+
+		/* position on a 4K boundary before the alloc_current */
+		/* Pad the FDT by a specified amount */
+		of_len = *of_size + CFG_FDT_PAD;
+		of_start = (unsigned long)lmb_alloc_base(lmb, of_len, 0x1000,
+				(CFG_BOOTMAPSZ + bootmap_base));
+
+		if (of_start == 0) {
+			puts("device tree - allocation error\n");
+			goto error;
+		}
+
+		debug ("## device tree at 0x%08lX ... 0x%08lX (len=%ld=0x%lX)\n",
+			(ulong)fdt_blob, (ulong)fdt_blob + *of_size - 1,
+			of_len, of_len);
+
+		printf ("   Loading Device Tree to %08lx, end %08lx ... ",
+			of_start, of_start + of_len - 1);
+
+		err = fdt_open_into (fdt_blob, (void *)of_start, of_len);
+		if (err != 0) {
+			fdt_error ("fdt move failed");
+			goto error;
+		}
+		puts ("OK\n");
+
+		*of_flat_tree = (char *)of_start;
+		*of_size = of_len;
+	} else {
+		*of_flat_tree = fdt_blob;
+		of_len = (CFG_BOOTMAPSZ + bootmap_base) - (ulong)fdt_blob;
+		lmb_reserve(lmb, (ulong)fdt_blob, of_len);
+		fdt_set_totalsize(*of_flat_tree, of_len);
+
+		*of_size = of_len;
+	}
+
+	return 0;
+
+error:
+	return 1;
+}
+
+/**
+ * boot_get_fdt - main fdt handling routine
+ * @argc: command argument count
+ * @argv: command argument list
+ * @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 *argv[], bootm_headers_t *images,
+		char **of_flat_tree, ulong *of_size)
+{
+	ulong		fdt_addr;
+	image_header_t	*fdt_hdr;
+	char		*fdt_blob = NULL;
+	ulong		image_start, image_end;
+	ulong		load_start, load_end;
+#if defined(CONFIG_FIT)
+	void		*fit_hdr;
+	const char	*fit_uname_config = NULL;
+	const char	*fit_uname_fdt = NULL;
+	ulong		default_addr;
+	int		cfg_noffset;
+	int		fdt_noffset;
+	const void	*data;
+	size_t		size;
+#endif
+
+	*of_flat_tree = NULL;
+	*of_size = 0;
+
+	if (argc > 3 || genimg_has_config (images)) {
+#if defined(CONFIG_FIT)
+		if (argc > 3) {
+			/*
+			 * 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 (argv[3], 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 (argv[3], 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(argv[3], NULL, 16);
+				debug ("*  fdt: cmdline image address = 0x%08lx\n",
+						fdt_addr);
+			}
+#if defined(CONFIG_FIT)
+		} else {
+			/* use FIT configuration provided in first bootm
+			 * command argument
+			 */
+			fdt_addr = (ulong)images->fit_hdr_os;
+			fit_uname_config = images->fit_uname_cfg;
+			debug ("*  fdt: using config '%s' from image at 0x%08lx\n",
+					fit_uname_config, fdt_addr);
+
+			/*
+			 * Check whether configuration has FDT blob defined,
+			 * if not quit silently.
+			 */
+			fit_hdr = (void *)fdt_addr;
+			cfg_noffset = fit_conf_get_node (fit_hdr,
+					fit_uname_config);
+			if (cfg_noffset < 0) {
+				debug ("*  fdt: no such config\n");
+				return 0;
+			}
+
+			fdt_noffset = fit_conf_get_fdt_node (fit_hdr,
+					cfg_noffset);
+			if (fdt_noffset < 0) {
+				debug ("*  fdt: no fdt in config\n");
+				return 0;
+			}
+		}
+#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.
+		 */
+		switch (genimg_get_format ((void *)fdt_addr)) {
+		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 error;
+
+			/*
+			 * move image data to the load address,
+			 * make sure we don't overwrite initial image
+			 */
+			image_start = (ulong)fdt_hdr;
+			image_end = image_get_image_end (fdt_hdr);
+
+			load_start = image_get_load (fdt_hdr);
+			load_end = load_start + image_get_data_size (fdt_hdr);
+
+			if ((load_start < image_end) && (load_end > image_start)) {
+				fdt_error ("fdt overwritten");
+				goto error;
+			}
+
+			debug ("   Loading FDT from 0x%08lx to 0x%08lx\n",
+					image_get_data (fdt_hdr), load_start);
+
+			memmove ((void *)load_start,
+					(void *)image_get_data (fdt_hdr),
+					image_get_data_size (fdt_hdr));
+
+			fdt_blob = (char *)load_start;
+			break;
+		case IMAGE_FORMAT_FIT:
+			/*
+			 * This case will catch both: new uImage format
+			 * (libfdt based) and raw FDT blob (also libfdt
+			 * based).
+			 */
+#if defined(CONFIG_FIT)
+			/* check FDT blob vs FIT blob */
+			if (fit_check_format ((const void *)fdt_addr)) {
+				/*
+				 * FIT image
+				 */
+				fit_hdr = (void *)fdt_addr;
+				printf ("## Flattened Device Tree from FIT Image at %08lx\n",
+						fdt_addr);
+
+				if (!fit_uname_fdt) {
+					/*
+					 * no FDT blob 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
+					 */
+					cfg_noffset = fit_conf_get_node (fit_hdr,
+							fit_uname_config);
+
+					if (cfg_noffset < 0) {
+						fdt_error ("Could not find configuration node\n");
+						goto error;
+					}
+
+					fit_uname_config = fdt_get_name (fit_hdr,
+							cfg_noffset, NULL);
+					printf ("   Using '%s' configuration\n",
+							fit_uname_config);
+
+					fdt_noffset = fit_conf_get_fdt_node (fit_hdr,
+							cfg_noffset);
+					fit_uname_fdt = fit_get_name (fit_hdr,
+							fdt_noffset, NULL);
+				} else {
+					/* get FDT component image node offset */
+					fdt_noffset = fit_image_get_node (fit_hdr,
+							fit_uname_fdt);
+				}
+				if (fdt_noffset < 0) {
+					fdt_error ("Could not find subimage node\n");
+					goto error;
+				}
+
+				printf ("   Trying '%s' FDT blob subimage\n",
+						fit_uname_fdt);
+
+				if (!fit_check_fdt (fit_hdr, fdt_noffset,
+							images->verify))
+					goto error;
+
+				/* get ramdisk image data address and length */
+				if (fit_image_get_data (fit_hdr, fdt_noffset,
+							&data, &size)) {
+					fdt_error ("Could not find FDT subimage data");
+					goto error;
+				}
+
+				/* verift that image data is a proper FDT blob */
+				if (fdt_check_header ((char *)data) != 0) {
+					fdt_error ("Subimage data is not a FTD");
+					goto error;
+				}
+
+				/*
+				 * move image data to the load address,
+				 * make sure we don't overwrite initial image
+				 */
+				image_start = (ulong)fit_hdr;
+				image_end = fit_get_end (fit_hdr);
+
+				if (fit_image_get_load (fit_hdr, fdt_noffset,
+							&load_start) == 0) {
+					load_end = load_start + size;
+
+					if ((load_start < image_end) &&
+							(load_end > image_start)) {
+						fdt_error ("FDT overwritten");
+						goto error;
+					}
+
+					printf ("   Loading FDT from 0x%08lx to 0x%08lx\n",
+							(ulong)data, load_start);
+
+					memmove ((void *)load_start,
+							(void *)data, size);
+
+					fdt_blob = (char *)load_start;
+				} else {
+					fdt_blob = (char *)data;
+				}
+
+				images->fit_hdr_fdt = fit_hdr;
+				images->fit_uname_fdt = fit_uname_fdt;
+				images->fit_noffset_fdt = fdt_noffset;
+				break;
+			} else
+#endif
+			{
+				/*
+				 * FDT blob
+				 */
+				fdt_blob = (char *)fdt_addr;
+				debug ("*  fdt: raw FDT blob\n");
+				printf ("## Flattened Device Tree blob at %08lx\n", (long)fdt_blob);
+			}
+			break;
+		default:
+			fdt_error ("Did not find a cmdline Flattened Device Tree");
+			goto error;
+		}
+
+		printf ("   Booting using the fdt blob at 0x%x\n", (int)fdt_blob);
+
+	} 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%x\n", (int)fdt_blob);
+
+			if (fdt_check_header (fdt_blob) != 0) {
+				fdt_error ("image is not a fdt");
+				goto error;
+			}
+
+			if (be32_to_cpu (fdt_totalsize (fdt_blob)) != fdt_len) {
+				fdt_error ("fdt size != image size");
+				goto error;
+			}
+		} else {
+			debug ("## No Flattened Device Tree\n");
+			return 0;
+		}
+	} else {
+		debug ("## No Flattened Device Tree\n");
+		return 0;
+	}
+
+	*of_flat_tree = fdt_blob;
+	*of_size = be32_to_cpu (fdt_totalsize (fdt_blob));
+	debug ("   of_flat_tree at 0x%08lx size 0x%08lx\n",
+			*of_flat_tree, *of_size);
+
+	return 0;
+
+error:
+	*of_flat_tree = 0;
+	*of_size = 0;
+	return 1;
+}
+#endif /* CONFIG_OF_LIBFDT */
+
 /**
  * boot_get_cmdline - allocate and initialize kernel cmdline
  * @lmb: pointer to lmb handle, will be used for memory mgmt
diff --git a/include/image.h b/include/image.h
index b8577a0..653cbc6 100644
--- a/include/image.h
+++ b/include/image.h
@@ -223,6 +223,11 @@ typedef struct bootm_headers {
 
 	ulong		rd_start, rd_end;/* ramdisk start/end */
 
+#ifdef CONFIG_OF_LIBFDT
+	char		*ft_addr;	/* flat dev tree address */
+#endif
+	ulong		ft_len;		/* length of flat device tree */
+
 	int		verify;		/* getenv("verify")[0] != 'n' */
 	struct lmb	*lmb;		/* for memory mgmt */
 } bootm_headers_t;
@@ -273,6 +278,14 @@ ulong genimg_get_image (ulong img_addr);
 int boot_get_ramdisk (int argc, char *argv[], bootm_headers_t *images,
 		uint8_t arch, ulong *rd_start, ulong *rd_end);
 
+
+#ifdef CONFIG_OF_LIBFDT
+int boot_get_fdt (int flag, int argc, char *argv[], bootm_headers_t *images,
+		char **of_flat_tree, ulong *of_size);
+int boot_relocate_fdt (struct lmb *lmb, ulong bootmap_base,
+		char **of_flat_tree, ulong *of_size);
+#endif
+
 #if defined(CONFIG_PPC) || defined(CONFIG_M68K)
 int boot_ramdisk_high (struct lmb *lmb, ulong rd_data, ulong rd_len,
 		  ulong *initrd_start, ulong *initrd_end);
diff --git a/lib_ppc/bootm.c b/lib_ppc/bootm.c
index e6a6e44..a3e632f 100644
--- a/lib_ppc/bootm.c
+++ b/lib_ppc/bootm.c
@@ -39,22 +39,12 @@
 #include <libfdt.h>
 #include <fdt_support.h>
 
-static void fdt_error (const char *msg);
-static int boot_get_fdt (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[],
-		bootm_headers_t *images, char **of_flat_tree, ulong *of_size);
-static int boot_relocate_fdt (struct lmb *lmb, ulong bootmap_base,
-		cmd_tbl_t *cmdtp, int flag, int argc, char *argv[],
-		char **of_flat_tree, ulong *of_size);
 #endif
 
 #ifdef CFG_INIT_RAM_LOCK
 #include <asm/cache.h>
 #endif
 
-#ifndef CFG_FDT_PAD
-#define CFG_FDT_PAD 0x3000
-#endif
-
 DECLARE_GLOBAL_DATA_PTR;
 
 extern int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]);
@@ -82,11 +72,11 @@ do_bootm_linux(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[],
 	void	(*kernel)(bd_t *, ulong r4, ulong r5, ulong r6,
 			  ulong r7, ulong r8, ulong r9);
 	int	ret;
-	ulong	of_size = 0;
+	ulong	of_size = images->ft_len;
 	struct lmb *lmb = images->lmb;
 
 #if defined(CONFIG_OF_LIBFDT)
-	char	*of_flat_tree = NULL;
+	char	*of_flat_tree = images->ft_addr;
 #endif
 
 	kernel = (void (*)(bd_t *, ulong, ulong, ulong,
@@ -128,14 +118,6 @@ do_bootm_linux(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[],
 	sp -= 1024;
 	lmb_reserve(lmb, sp, (CFG_SDRAM_BASE + get_effective_memsize() - sp));
 
-#if defined(CONFIG_OF_LIBFDT)
-	/* find flattened device tree */
-	ret = boot_get_fdt (cmdtp, flag, argc, argv, images, &of_flat_tree, &of_size);
-
-	if (ret)
-		goto error;
-#endif
-
 	if (!of_size) {
 		/* allocate space and init command line */
 		ret = boot_get_cmdline (lmb, &cmd_start, &cmd_end, bootmap_base);
@@ -156,8 +138,9 @@ do_bootm_linux(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[],
 	rd_len = images->rd_end - images->rd_start;
 
 #if defined(CONFIG_OF_LIBFDT)
-	ret = boot_relocate_fdt (lmb, bootmap_base,
-		cmdtp, flag, argc, argv, &of_flat_tree, &of_size);
+	ret = boot_relocate_fdt(lmb, bootmap_base, &of_flat_tree, &of_size);
+	if (ret)
+		goto error;
 
 	/*
 	 * Add the chosen node if it doesn't exist, add the env and bd_t
@@ -166,7 +149,9 @@ do_bootm_linux(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[],
 	if (of_size) {
 		/* pass in dummy initrd info, we'll fix up later */
 		if (fdt_chosen(of_flat_tree, images->rd_start, images->rd_end, 0) < 0) {
-			fdt_error ("/chosen node create failed");
+			puts ("ERROR: ");
+			puts ("/chosen node create failed");
+			puts (" - must RESET the board to recover.\n");
 			goto error;
 		}
 #ifdef CONFIG_OF_BOARD_SETUP
@@ -339,464 +324,3 @@ static void set_clocks_in_mhz (bd_t *kbd)
 #endif /* CONFIG_MPC5xxx */
 	}
 }
-
-#if defined(CONFIG_OF_LIBFDT)
-static void fdt_error (const char *msg)
-{
-	puts ("ERROR: ");
-	puts (msg);
-	puts (" - must RESET the board to recover.\n");
-}
-
-static image_header_t *image_get_fdt (ulong fdt_addr)
-{
-	image_header_t *fdt_hdr = (image_header_t *)fdt_addr;
-
-	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 ((char *)image_get_data (fdt_hdr)) != 0) {
-		fdt_error ("uImage data is not a fdt");
-		return NULL;
-	}
-	return fdt_hdr;
-}
-
-/**
- * fit_check_fdt - verify FIT format FDT subimage
- * @fit_hdr: pointer to the FIT  header
- * fdt_noffset: FDT subimage node offset within FIT image
- * @verify: data CRC verification flag
- *
- * fit_check_fdt() verifies integrity of the FDT subimage and from
- * specified FIT image.
- *
- * returns:
- *     1, on success
- *     0, on failure
- */
-#if defined(CONFIG_FIT)
-static int fit_check_fdt (const void *fit, int fdt_noffset, int verify)
-{
-	fit_image_print (fit, fdt_noffset, "   ");
-
-	if (verify) {
-		puts ("   Verifying Hash Integrity ... ");
-		if (!fit_image_check_hashes (fit, fdt_noffset)) {
-			fdt_error ("Bad Data Hash");
-			return 0;
-		}
-		puts ("OK\n");
-	}
-
-	if (!fit_image_check_type (fit, fdt_noffset, IH_TYPE_FLATDT)) {
-		fdt_error ("Not a FDT image");
-		return 0;
-	}
-
-	if (!fit_image_check_comp (fit, fdt_noffset, IH_COMP_NONE)) {
-		fdt_error ("FDT image is compressed");
-		return 0;
-	}
-
-	return 1;
-}
-#endif /* CONFIG_FIT */
-
-static int boot_get_fdt (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[],
-		bootm_headers_t *images, char **of_flat_tree, ulong *of_size)
-{
-	ulong		fdt_addr;
-	image_header_t	*fdt_hdr;
-	char		*fdt_blob = NULL;
-	ulong		image_start, image_end;
-	ulong		load_start, load_end;
-#if defined(CONFIG_FIT)
-	void		*fit_hdr;
-	const char	*fit_uname_config = NULL;
-	const char	*fit_uname_fdt = NULL;
-	ulong		default_addr;
-	int		cfg_noffset;
-	int		fdt_noffset;
-	const void	*data;
-	size_t		size;
-#endif
-
-	*of_flat_tree = NULL;
-	*of_size = 0;
-
-	if (argc > 3 || genimg_has_config (images)) {
-#if defined(CONFIG_FIT)
-		if (argc > 3) {
-			/*
-			 * 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 (argv[3], 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 (argv[3], 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(argv[3], NULL, 16);
-				debug ("*  fdt: cmdline image address = 0x%08lx\n",
-						fdt_addr);
-			}
-#if defined(CONFIG_FIT)
-		} else {
-			/* use FIT configuration provided in first bootm
-			 * command argument
-			 */
-			fdt_addr = (ulong)images->fit_hdr_os;
-			fit_uname_config = images->fit_uname_cfg;
-			debug ("*  fdt: using config '%s' from image at 0x%08lx\n",
-					fit_uname_config, fdt_addr);
-
-			/*
-			 * Check whether configuration has FDT blob defined,
-			 * if not quit silently.
-			 */
-			fit_hdr = (void *)fdt_addr;
-			cfg_noffset = fit_conf_get_node (fit_hdr,
-					fit_uname_config);
-			if (cfg_noffset < 0) {
-				debug ("*  fdt: no such config\n");
-				return 0;
-			}
-
-			fdt_noffset = fit_conf_get_fdt_node (fit_hdr,
-					cfg_noffset);
-			if (fdt_noffset < 0) {
-				debug ("*  fdt: no fdt in config\n");
-				return 0;
-			}
-		}
-#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.
-		 */
-		switch (genimg_get_format ((void *)fdt_addr)) {
-		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 error;
-
-			/*
-			 * move image data to the load address,
-			 * make sure we don't overwrite initial image
-			 */
-			image_start = (ulong)fdt_hdr;
-			image_end = image_get_image_end (fdt_hdr);
-
-			load_start = image_get_load (fdt_hdr);
-			load_end = load_start + image_get_data_size (fdt_hdr);
-
-			if ((load_start < image_end) && (load_end > image_start)) {
-				fdt_error ("fdt overwritten");
-				goto error;
-			}
-
-			debug ("   Loading FDT from 0x%08lx to 0x%08lx\n",
-					image_get_data (fdt_hdr), load_start);
-
-			memmove ((void *)load_start,
-					(void *)image_get_data (fdt_hdr),
-					image_get_data_size (fdt_hdr));
-
-			fdt_blob = (char *)load_start;
-			break;
-		case IMAGE_FORMAT_FIT:
-			/*
-			 * This case will catch both: new uImage format
-			 * (libfdt based) and raw FDT blob (also libfdt
-			 * based).
-			 */
-#if defined(CONFIG_FIT)
-			/* check FDT blob vs FIT blob */
-			if (fit_check_format ((const void *)fdt_addr)) {
-				/*
-				 * FIT image
-				 */
-				fit_hdr = (void *)fdt_addr;
-				printf ("## Flattened Device Tree from FIT Image at %08lx\n",
-						fdt_addr);
-
-				if (!fit_uname_fdt) {
-					/*
-					 * no FDT blob 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
-					 */
-					cfg_noffset = fit_conf_get_node (fit_hdr,
-							fit_uname_config);
-
-					if (cfg_noffset < 0) {
-						fdt_error ("Could not find configuration node\n");
-						goto error;
-					}
-
-					fit_uname_config = fdt_get_name (fit_hdr,
-							cfg_noffset, NULL);
-					printf ("   Using '%s' configuration\n",
-							fit_uname_config);
-
-					fdt_noffset = fit_conf_get_fdt_node (fit_hdr,
-							cfg_noffset);
-					fit_uname_fdt = fit_get_name (fit_hdr,
-							fdt_noffset, NULL);
-				} else {
-					/* get FDT component image node offset */
-					fdt_noffset = fit_image_get_node (fit_hdr,
-							fit_uname_fdt);
-				}
-				if (fdt_noffset < 0) {
-					fdt_error ("Could not find subimage node\n");
-					goto error;
-				}
-
-				printf ("   Trying '%s' FDT blob subimage\n",
-						fit_uname_fdt);
-
-				if (!fit_check_fdt (fit_hdr, fdt_noffset,
-							images->verify))
-					goto error;
-
-				/* get ramdisk image data address and length */
-				if (fit_image_get_data (fit_hdr, fdt_noffset,
-							&data, &size)) {
-					fdt_error ("Could not find FDT subimage data");
-					goto error;
-				}
-
-				/* verift that image data is a proper FDT blob */
-				if (fdt_check_header ((char *)data) != 0) {
-					fdt_error ("Subimage data is not a FTD");
-					goto error;
-				}
-
-				/*
-				 * move image data to the load address,
-				 * make sure we don't overwrite initial image
-				 */
-				image_start = (ulong)fit_hdr;
-				image_end = fit_get_end (fit_hdr);
-
-				if (fit_image_get_load (fit_hdr, fdt_noffset,
-							&load_start) == 0) {
-					load_end = load_start + size;
-
-					if ((load_start < image_end) &&
-							(load_end > image_start)) {
-						fdt_error ("FDT overwritten");
-						goto error;
-					}
-
-					printf ("   Loading FDT from 0x%08lx to 0x%08lx\n",
-							(ulong)data, load_start);
-
-					memmove ((void *)load_start,
-							(void *)data, size);
-
-					fdt_blob = (char *)load_start;
-				} else {
-					fdt_blob = (char *)data;
-				}
-
-				images->fit_hdr_fdt = fit_hdr;
-				images->fit_uname_fdt = fit_uname_fdt;
-				images->fit_noffset_fdt = fdt_noffset;
-				break;
-			} else
-#endif
-			{
-				/*
-				 * FDT blob
-				 */
-				fdt_blob = (char *)fdt_addr;
-				debug ("*  fdt: raw FDT blob\n");
-				printf ("## Flattened Device Tree blob at %08lx\n", (long)fdt_blob);
-			}
-			break;
-		default:
-			fdt_error ("Did not find a cmdline Flattened Device Tree");
-			goto error;
-		}
-
-		printf ("   Booting using the fdt blob at 0x%x\n", (int)fdt_blob);
-
-	} 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%x\n", (int)fdt_blob);
-
-			if (fdt_check_header (fdt_blob) != 0) {
-				fdt_error ("image is not a fdt");
-				goto error;
-			}
-
-			if (be32_to_cpu (fdt_totalsize (fdt_blob)) != fdt_len) {
-				fdt_error ("fdt size != image size");
-				goto error;
-			}
-		} else {
-			debug ("## No Flattened Device Tree\n");
-			return 0;
-		}
-	} else {
-		debug ("## No Flattened Device Tree\n");
-		return 0;
-	}
-
-	*of_flat_tree = fdt_blob;
-	*of_size = be32_to_cpu (fdt_totalsize (fdt_blob));
-	debug ("   of_flat_tree at 0x%08lx size 0x%08lx\n",
-			*of_flat_tree, *of_size);
-
-	return 0;
-
-error:
-	do_reset (cmdtp, flag, argc, argv);
-	return 1;
-}
-
-static int boot_relocate_fdt (struct lmb *lmb, ulong bootmap_base,
-		cmd_tbl_t *cmdtp, int flag, int argc, char *argv[],
-		char **of_flat_tree, ulong *of_size)
-{
-	char	*fdt_blob = *of_flat_tree;
-	ulong	relocate = 0;
-	ulong	of_len = 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;
-	}
-
-#ifndef CFG_NO_FLASH
-	/* move the blob if it is in flash (set relocate) */
-	if (addr2info ((ulong)fdt_blob) != NULL)
-		relocate = 1;
-#endif
-
-	/*
-	 * The blob needs to be inside the boot mapping.
-	 */
-	if (fdt_blob < (char *)bootmap_base)
-		relocate = 1;
-
-	if ((fdt_blob + *of_size + CFG_FDT_PAD) >=
-			((char *)CFG_BOOTMAPSZ + bootmap_base))
-		relocate = 1;
-
-	/* move flattend device tree if needed */
-	if (relocate) {
-		int err;
-		ulong of_start = 0;
-
-		/* position on a 4K boundary before the alloc_current */
-		/* Pad the FDT by a specified amount */
-		of_len = *of_size + CFG_FDT_PAD;
-		of_start = (unsigned long)lmb_alloc_base(lmb, of_len, 0x1000,
-				(CFG_BOOTMAPSZ + bootmap_base));
-
-		if (of_start == 0) {
-			puts("device tree - allocation error\n");
-			goto error;
-		}
-
-		debug ("## device tree at 0x%08lX ... 0x%08lX (len=%ld=0x%lX)\n",
-			(ulong)fdt_blob, (ulong)fdt_blob + *of_size - 1,
-			of_len, of_len);
-
-		printf ("   Loading Device Tree to %08lx, end %08lx ... ",
-			of_start, of_start + of_len - 1);
-
-		err = fdt_open_into (fdt_blob, (void *)of_start, of_len);
-		if (err != 0) {
-			fdt_error ("fdt move failed");
-			goto error;
-		}
-		puts ("OK\n");
-
-		*of_flat_tree = (char *)of_start;
-		*of_size = of_len;
-	} else {
-		*of_flat_tree = fdt_blob;
-		of_len = (CFG_BOOTMAPSZ + bootmap_base) - (ulong)fdt_blob;
-		lmb_reserve(lmb, (ulong)fdt_blob, of_len);
-		fdt_set_totalsize(*of_flat_tree, of_len);
-
-		*of_size = of_len;
-	}
-
-	return 0;
-
-error:
-	return 1;
-}
-#endif