xref: /openbmc/u-boot/common/image-fit.c (revision 9309aad0)
1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3  * Copyright (c) 2013, Google Inc.
4  *
5  * (C) Copyright 2008 Semihalf
6  *
7  * (C) Copyright 2000-2006
8  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
9  */
10 
11 #ifdef USE_HOSTCC
12 #include "mkimage.h"
13 #include <time.h>
14 #else
15 #include <linux/compiler.h>
16 #include <linux/kconfig.h>
17 #include <common.h>
18 #include <errno.h>
19 #include <mapmem.h>
20 #include <asm/io.h>
21 #include <malloc.h>
22 DECLARE_GLOBAL_DATA_PTR;
23 #endif /* !USE_HOSTCC*/
24 
25 #include <image.h>
26 #include <bootstage.h>
27 #include <u-boot/crc.h>
28 #include <u-boot/md5.h>
29 #include <u-boot/sha1.h>
30 #include <u-boot/sha256.h>
31 
32 /*****************************************************************************/
33 /* New uImage format routines */
34 /*****************************************************************************/
35 #ifndef USE_HOSTCC
36 static int fit_parse_spec(const char *spec, char sepc, ulong addr_curr,
37 		ulong *addr, const char **name)
38 {
39 	const char *sep;
40 
41 	*addr = addr_curr;
42 	*name = NULL;
43 
44 	sep = strchr(spec, sepc);
45 	if (sep) {
46 		if (sep - spec > 0)
47 			*addr = simple_strtoul(spec, NULL, 16);
48 
49 		*name = sep + 1;
50 		return 1;
51 	}
52 
53 	return 0;
54 }
55 
56 /**
57  * fit_parse_conf - parse FIT configuration spec
58  * @spec: input string, containing configuration spec
59  * @add_curr: current image address (to be used as a possible default)
60  * @addr: pointer to a ulong variable, will hold FIT image address of a given
61  * configuration
62  * @conf_name double pointer to a char, will hold pointer to a configuration
63  * unit name
64  *
65  * fit_parse_conf() expects configuration spec in the form of [<addr>]#<conf>,
66  * where <addr> is a FIT image address that contains configuration
67  * with a <conf> unit name.
68  *
69  * Address part is optional, and if omitted default add_curr will
70  * be used instead.
71  *
72  * returns:
73  *     1 if spec is a valid configuration string,
74  *     addr and conf_name are set accordingly
75  *     0 otherwise
76  */
77 int fit_parse_conf(const char *spec, ulong addr_curr,
78 		ulong *addr, const char **conf_name)
79 {
80 	return fit_parse_spec(spec, '#', addr_curr, addr, conf_name);
81 }
82 
83 /**
84  * fit_parse_subimage - parse FIT subimage spec
85  * @spec: input string, containing subimage spec
86  * @add_curr: current image address (to be used as a possible default)
87  * @addr: pointer to a ulong variable, will hold FIT image address of a given
88  * subimage
89  * @image_name: double pointer to a char, will hold pointer to a subimage name
90  *
91  * fit_parse_subimage() expects subimage spec in the form of
92  * [<addr>]:<subimage>, where <addr> is a FIT image address that contains
93  * subimage with a <subimg> unit name.
94  *
95  * Address part is optional, and if omitted default add_curr will
96  * be used instead.
97  *
98  * returns:
99  *     1 if spec is a valid subimage string,
100  *     addr and image_name are set accordingly
101  *     0 otherwise
102  */
103 int fit_parse_subimage(const char *spec, ulong addr_curr,
104 		ulong *addr, const char **image_name)
105 {
106 	return fit_parse_spec(spec, ':', addr_curr, addr, image_name);
107 }
108 #endif /* !USE_HOSTCC */
109 
110 static void fit_get_debug(const void *fit, int noffset,
111 		char *prop_name, int err)
112 {
113 	debug("Can't get '%s' property from FIT 0x%08lx, node: offset %d, name %s (%s)\n",
114 	      prop_name, (ulong)fit, noffset, fit_get_name(fit, noffset, NULL),
115 	      fdt_strerror(err));
116 }
117 
118 /**
119  * fit_get_subimage_count - get component (sub-image) count
120  * @fit: pointer to the FIT format image header
121  * @images_noffset: offset of images node
122  *
123  * returns:
124  *     number of image components
125  */
126 int fit_get_subimage_count(const void *fit, int images_noffset)
127 {
128 	int noffset;
129 	int ndepth;
130 	int count = 0;
131 
132 	/* Process its subnodes, print out component images details */
133 	for (ndepth = 0, count = 0,
134 		noffset = fdt_next_node(fit, images_noffset, &ndepth);
135 	     (noffset >= 0) && (ndepth > 0);
136 	     noffset = fdt_next_node(fit, noffset, &ndepth)) {
137 		if (ndepth == 1) {
138 			count++;
139 		}
140 	}
141 
142 	return count;
143 }
144 
145 #if !defined(CONFIG_SPL_BUILD) || defined(CONFIG_SPL_FIT_PRINT)
146 /**
147  * fit_image_print_data() - prints out the hash node details
148  * @fit: pointer to the FIT format image header
149  * @noffset: offset of the hash node
150  * @p: pointer to prefix string
151  * @type: Type of information to print ("hash" or "sign")
152  *
153  * fit_image_print_data() lists properties for the processed hash node
154  *
155  * This function avoid using puts() since it prints a newline on the host
156  * but does not in U-Boot.
157  *
158  * returns:
159  *     no returned results
160  */
161 static void fit_image_print_data(const void *fit, int noffset, const char *p,
162 				 const char *type)
163 {
164 	const char *keyname;
165 	uint8_t *value;
166 	int value_len;
167 	char *algo;
168 	const char *padding;
169 	int required;
170 	int ret, i;
171 
172 	debug("%s  %s node:    '%s'\n", p, type,
173 	      fit_get_name(fit, noffset, NULL));
174 	printf("%s  %s algo:    ", p, type);
175 	if (fit_image_hash_get_algo(fit, noffset, &algo)) {
176 		printf("invalid/unsupported\n");
177 		return;
178 	}
179 	printf("%s", algo);
180 	keyname = fdt_getprop(fit, noffset, "key-name-hint", NULL);
181 	required = fdt_getprop(fit, noffset, "required", NULL) != NULL;
182 	if (keyname)
183 		printf(":%s", keyname);
184 	if (required)
185 		printf(" (required)");
186 	printf("\n");
187 
188 	padding = fdt_getprop(fit, noffset, "padding", NULL);
189 	if (padding)
190 		printf("%s  %s padding: %s\n", p, type, padding);
191 
192 	ret = fit_image_hash_get_value(fit, noffset, &value,
193 				       &value_len);
194 	printf("%s  %s value:   ", p, type);
195 	if (ret) {
196 		printf("unavailable\n");
197 	} else {
198 		for (i = 0; i < value_len; i++)
199 			printf("%02x", value[i]);
200 		printf("\n");
201 	}
202 
203 	debug("%s  %s len:     %d\n", p, type, value_len);
204 
205 	/* Signatures have a time stamp */
206 	if (IMAGE_ENABLE_TIMESTAMP && keyname) {
207 		time_t timestamp;
208 
209 		printf("%s  Timestamp:    ", p);
210 		if (fit_get_timestamp(fit, noffset, &timestamp))
211 			printf("unavailable\n");
212 		else
213 			genimg_print_time(timestamp);
214 	}
215 }
216 
217 /**
218  * fit_image_print_verification_data() - prints out the hash/signature details
219  * @fit: pointer to the FIT format image header
220  * @noffset: offset of the hash or signature node
221  * @p: pointer to prefix string
222  *
223  * This lists properties for the processed hash node
224  *
225  * returns:
226  *     no returned results
227  */
228 static void fit_image_print_verification_data(const void *fit, int noffset,
229 					      const char *p)
230 {
231 	const char *name;
232 
233 	/*
234 	 * Check subnode name, must be equal to "hash" or "signature".
235 	 * Multiple hash/signature nodes require unique unit node
236 	 * names, e.g. hash-1, hash-2, signature-1, signature-2, etc.
237 	 */
238 	name = fit_get_name(fit, noffset, NULL);
239 	if (!strncmp(name, FIT_HASH_NODENAME, strlen(FIT_HASH_NODENAME))) {
240 		fit_image_print_data(fit, noffset, p, "Hash");
241 	} else if (!strncmp(name, FIT_SIG_NODENAME,
242 				strlen(FIT_SIG_NODENAME))) {
243 		fit_image_print_data(fit, noffset, p, "Sign");
244 	}
245 }
246 
247 /**
248  * fit_conf_print - prints out the FIT configuration details
249  * @fit: pointer to the FIT format image header
250  * @noffset: offset of the configuration node
251  * @p: pointer to prefix string
252  *
253  * fit_conf_print() lists all mandatory properties for the processed
254  * configuration node.
255  *
256  * returns:
257  *     no returned results
258  */
259 static void fit_conf_print(const void *fit, int noffset, const char *p)
260 {
261 	char *desc;
262 	const char *uname;
263 	int ret;
264 	int fdt_index, loadables_index;
265 	int ndepth;
266 
267 	/* Mandatory properties */
268 	ret = fit_get_desc(fit, noffset, &desc);
269 	printf("%s  Description:  ", p);
270 	if (ret)
271 		printf("unavailable\n");
272 	else
273 		printf("%s\n", desc);
274 
275 	uname = fdt_getprop(fit, noffset, FIT_KERNEL_PROP, NULL);
276 	printf("%s  Kernel:       ", p);
277 	if (!uname)
278 		printf("unavailable\n");
279 	else
280 		printf("%s\n", uname);
281 
282 	/* Optional properties */
283 	uname = fdt_getprop(fit, noffset, FIT_RAMDISK_PROP, NULL);
284 	if (uname)
285 		printf("%s  Init Ramdisk: %s\n", p, uname);
286 
287 	uname = fdt_getprop(fit, noffset, FIT_FIRMWARE_PROP, NULL);
288 	if (uname)
289 		printf("%s  Firmware:     %s\n", p, uname);
290 
291 	for (fdt_index = 0;
292 	     uname = fdt_stringlist_get(fit, noffset, FIT_FDT_PROP,
293 					fdt_index, NULL), uname;
294 	     fdt_index++) {
295 		if (fdt_index == 0)
296 			printf("%s  FDT:          ", p);
297 		else
298 			printf("%s                ", p);
299 		printf("%s\n", uname);
300 	}
301 
302 	uname = fdt_getprop(fit, noffset, FIT_FPGA_PROP, NULL);
303 	if (uname)
304 		printf("%s  FPGA:         %s\n", p, uname);
305 
306 	/* Print out all of the specified loadables */
307 	for (loadables_index = 0;
308 	     uname = fdt_stringlist_get(fit, noffset, FIT_LOADABLE_PROP,
309 					loadables_index, NULL), uname;
310 	     loadables_index++) {
311 		if (loadables_index == 0) {
312 			printf("%s  Loadables:    ", p);
313 		} else {
314 			printf("%s                ", p);
315 		}
316 		printf("%s\n", uname);
317 	}
318 
319 	/* Process all hash subnodes of the component configuration node */
320 	for (ndepth = 0, noffset = fdt_next_node(fit, noffset, &ndepth);
321 	     (noffset >= 0) && (ndepth > 0);
322 	     noffset = fdt_next_node(fit, noffset, &ndepth)) {
323 		if (ndepth == 1) {
324 			/* Direct child node of the component configuration node */
325 			fit_image_print_verification_data(fit, noffset, p);
326 		}
327 	}
328 }
329 
330 /**
331  * fit_print_contents - prints out the contents of the FIT format image
332  * @fit: pointer to the FIT format image header
333  * @p: pointer to prefix string
334  *
335  * fit_print_contents() formats a multi line FIT image contents description.
336  * The routine prints out FIT image properties (root node level) followed by
337  * the details of each component image.
338  *
339  * returns:
340  *     no returned results
341  */
342 void fit_print_contents(const void *fit)
343 {
344 	char *desc;
345 	char *uname;
346 	int images_noffset;
347 	int confs_noffset;
348 	int noffset;
349 	int ndepth;
350 	int count = 0;
351 	int ret;
352 	const char *p;
353 	time_t timestamp;
354 
355 	/* Indent string is defined in header image.h */
356 	p = IMAGE_INDENT_STRING;
357 
358 	/* Root node properties */
359 	ret = fit_get_desc(fit, 0, &desc);
360 	printf("%sFIT description: ", p);
361 	if (ret)
362 		printf("unavailable\n");
363 	else
364 		printf("%s\n", desc);
365 
366 	if (IMAGE_ENABLE_TIMESTAMP) {
367 		ret = fit_get_timestamp(fit, 0, &timestamp);
368 		printf("%sCreated:         ", p);
369 		if (ret)
370 			printf("unavailable\n");
371 		else
372 			genimg_print_time(timestamp);
373 	}
374 
375 	/* Find images parent node offset */
376 	images_noffset = fdt_path_offset(fit, FIT_IMAGES_PATH);
377 	if (images_noffset < 0) {
378 		printf("Can't find images parent node '%s' (%s)\n",
379 		       FIT_IMAGES_PATH, fdt_strerror(images_noffset));
380 		return;
381 	}
382 
383 	/* Process its subnodes, print out component images details */
384 	for (ndepth = 0, count = 0,
385 		noffset = fdt_next_node(fit, images_noffset, &ndepth);
386 	     (noffset >= 0) && (ndepth > 0);
387 	     noffset = fdt_next_node(fit, noffset, &ndepth)) {
388 		if (ndepth == 1) {
389 			/*
390 			 * Direct child node of the images parent node,
391 			 * i.e. component image node.
392 			 */
393 			printf("%s Image %u (%s)\n", p, count++,
394 			       fit_get_name(fit, noffset, NULL));
395 
396 			fit_image_print(fit, noffset, p);
397 		}
398 	}
399 
400 	/* Find configurations parent node offset */
401 	confs_noffset = fdt_path_offset(fit, FIT_CONFS_PATH);
402 	if (confs_noffset < 0) {
403 		debug("Can't get configurations parent node '%s' (%s)\n",
404 		      FIT_CONFS_PATH, fdt_strerror(confs_noffset));
405 		return;
406 	}
407 
408 	/* get default configuration unit name from default property */
409 	uname = (char *)fdt_getprop(fit, noffset, FIT_DEFAULT_PROP, NULL);
410 	if (uname)
411 		printf("%s Default Configuration: '%s'\n", p, uname);
412 
413 	/* Process its subnodes, print out configurations details */
414 	for (ndepth = 0, count = 0,
415 		noffset = fdt_next_node(fit, confs_noffset, &ndepth);
416 	     (noffset >= 0) && (ndepth > 0);
417 	     noffset = fdt_next_node(fit, noffset, &ndepth)) {
418 		if (ndepth == 1) {
419 			/*
420 			 * Direct child node of the configurations parent node,
421 			 * i.e. configuration node.
422 			 */
423 			printf("%s Configuration %u (%s)\n", p, count++,
424 			       fit_get_name(fit, noffset, NULL));
425 
426 			fit_conf_print(fit, noffset, p);
427 		}
428 	}
429 }
430 
431 /**
432  * fit_image_print - prints out the FIT component image details
433  * @fit: pointer to the FIT format image header
434  * @image_noffset: offset of the component image node
435  * @p: pointer to prefix string
436  *
437  * fit_image_print() lists all mandatory properties for the processed component
438  * image. If present, hash nodes are printed out as well. Load
439  * address for images of type firmware is also printed out. Since the load
440  * address is not mandatory for firmware images, it will be output as
441  * "unavailable" when not present.
442  *
443  * returns:
444  *     no returned results
445  */
446 void fit_image_print(const void *fit, int image_noffset, const char *p)
447 {
448 	char *desc;
449 	uint8_t type, arch, os, comp;
450 	size_t size;
451 	ulong load, entry;
452 	const void *data;
453 	int noffset;
454 	int ndepth;
455 	int ret;
456 
457 	/* Mandatory properties */
458 	ret = fit_get_desc(fit, image_noffset, &desc);
459 	printf("%s  Description:  ", p);
460 	if (ret)
461 		printf("unavailable\n");
462 	else
463 		printf("%s\n", desc);
464 
465 	if (IMAGE_ENABLE_TIMESTAMP) {
466 		time_t timestamp;
467 
468 		ret = fit_get_timestamp(fit, 0, &timestamp);
469 		printf("%s  Created:      ", p);
470 		if (ret)
471 			printf("unavailable\n");
472 		else
473 			genimg_print_time(timestamp);
474 	}
475 
476 	fit_image_get_type(fit, image_noffset, &type);
477 	printf("%s  Type:         %s\n", p, genimg_get_type_name(type));
478 
479 	fit_image_get_comp(fit, image_noffset, &comp);
480 	printf("%s  Compression:  %s\n", p, genimg_get_comp_name(comp));
481 
482 	ret = fit_image_get_data_and_size(fit, image_noffset, &data, &size);
483 
484 #ifndef USE_HOSTCC
485 	printf("%s  Data Start:   ", p);
486 	if (ret) {
487 		printf("unavailable\n");
488 	} else {
489 		void *vdata = (void *)data;
490 
491 		printf("0x%08lx\n", (ulong)map_to_sysmem(vdata));
492 	}
493 #endif
494 
495 	printf("%s  Data Size:    ", p);
496 	if (ret)
497 		printf("unavailable\n");
498 	else
499 		genimg_print_size(size);
500 
501 	/* Remaining, type dependent properties */
502 	if ((type == IH_TYPE_KERNEL) || (type == IH_TYPE_STANDALONE) ||
503 	    (type == IH_TYPE_RAMDISK) || (type == IH_TYPE_FIRMWARE) ||
504 	    (type == IH_TYPE_FLATDT)) {
505 		fit_image_get_arch(fit, image_noffset, &arch);
506 		printf("%s  Architecture: %s\n", p, genimg_get_arch_name(arch));
507 	}
508 
509 	if ((type == IH_TYPE_KERNEL) || (type == IH_TYPE_RAMDISK) ||
510 	    (type == IH_TYPE_FIRMWARE)) {
511 		fit_image_get_os(fit, image_noffset, &os);
512 		printf("%s  OS:           %s\n", p, genimg_get_os_name(os));
513 	}
514 
515 	if ((type == IH_TYPE_KERNEL) || (type == IH_TYPE_STANDALONE) ||
516 	    (type == IH_TYPE_FIRMWARE) || (type == IH_TYPE_RAMDISK) ||
517 	    (type == IH_TYPE_FPGA)) {
518 		ret = fit_image_get_load(fit, image_noffset, &load);
519 		printf("%s  Load Address: ", p);
520 		if (ret)
521 			printf("unavailable\n");
522 		else
523 			printf("0x%08lx\n", load);
524 	}
525 
526 	/* optional load address for FDT */
527 	if (type == IH_TYPE_FLATDT && !fit_image_get_load(fit, image_noffset, &load))
528 		printf("%s  Load Address: 0x%08lx\n", p, load);
529 
530 	if ((type == IH_TYPE_KERNEL) || (type == IH_TYPE_STANDALONE) ||
531 	    (type == IH_TYPE_RAMDISK)) {
532 		ret = fit_image_get_entry(fit, image_noffset, &entry);
533 		printf("%s  Entry Point:  ", p);
534 		if (ret)
535 			printf("unavailable\n");
536 		else
537 			printf("0x%08lx\n", entry);
538 	}
539 
540 	/* Process all hash subnodes of the component image node */
541 	for (ndepth = 0, noffset = fdt_next_node(fit, image_noffset, &ndepth);
542 	     (noffset >= 0) && (ndepth > 0);
543 	     noffset = fdt_next_node(fit, noffset, &ndepth)) {
544 		if (ndepth == 1) {
545 			/* Direct child node of the component image node */
546 			fit_image_print_verification_data(fit, noffset, p);
547 		}
548 	}
549 }
550 #else
551 void fit_print_contents(const void *fit) { }
552 void fit_image_print(const void *fit, int image_noffset, const char *p) { }
553 #endif /* !defined(CONFIG_SPL_BUILD) || defined(CONFIG_SPL_FIT_PRINT) */
554 
555 /**
556  * fit_get_desc - get node description property
557  * @fit: pointer to the FIT format image header
558  * @noffset: node offset
559  * @desc: double pointer to the char, will hold pointer to the description
560  *
561  * fit_get_desc() reads description property from a given node, if
562  * description is found pointer to it is returned in third call argument.
563  *
564  * returns:
565  *     0, on success
566  *     -1, on failure
567  */
568 int fit_get_desc(const void *fit, int noffset, char **desc)
569 {
570 	int len;
571 
572 	*desc = (char *)fdt_getprop(fit, noffset, FIT_DESC_PROP, &len);
573 	if (*desc == NULL) {
574 		fit_get_debug(fit, noffset, FIT_DESC_PROP, len);
575 		return -1;
576 	}
577 
578 	return 0;
579 }
580 
581 /**
582  * fit_get_timestamp - get node timestamp property
583  * @fit: pointer to the FIT format image header
584  * @noffset: node offset
585  * @timestamp: pointer to the time_t, will hold read timestamp
586  *
587  * fit_get_timestamp() reads timestamp property from given node, if timestamp
588  * is found and has a correct size its value is returned in third call
589  * argument.
590  *
591  * returns:
592  *     0, on success
593  *     -1, on property read failure
594  *     -2, on wrong timestamp size
595  */
596 int fit_get_timestamp(const void *fit, int noffset, time_t *timestamp)
597 {
598 	int len;
599 	const void *data;
600 
601 	data = fdt_getprop(fit, noffset, FIT_TIMESTAMP_PROP, &len);
602 	if (data == NULL) {
603 		fit_get_debug(fit, noffset, FIT_TIMESTAMP_PROP, len);
604 		return -1;
605 	}
606 	if (len != sizeof(uint32_t)) {
607 		debug("FIT timestamp with incorrect size of (%u)\n", len);
608 		return -2;
609 	}
610 
611 	*timestamp = uimage_to_cpu(*((uint32_t *)data));
612 	return 0;
613 }
614 
615 /**
616  * fit_image_get_node - get node offset for component image of a given unit name
617  * @fit: pointer to the FIT format image header
618  * @image_uname: component image node unit name
619  *
620  * fit_image_get_node() finds a component image (within the '/images'
621  * node) of a provided unit name. If image is found its node offset is
622  * returned to the caller.
623  *
624  * returns:
625  *     image node offset when found (>=0)
626  *     negative number on failure (FDT_ERR_* code)
627  */
628 int fit_image_get_node(const void *fit, const char *image_uname)
629 {
630 	int noffset, images_noffset;
631 
632 	images_noffset = fdt_path_offset(fit, FIT_IMAGES_PATH);
633 	if (images_noffset < 0) {
634 		debug("Can't find images parent node '%s' (%s)\n",
635 		      FIT_IMAGES_PATH, fdt_strerror(images_noffset));
636 		return images_noffset;
637 	}
638 
639 	noffset = fdt_subnode_offset(fit, images_noffset, image_uname);
640 	if (noffset < 0) {
641 		debug("Can't get node offset for image unit name: '%s' (%s)\n",
642 		      image_uname, fdt_strerror(noffset));
643 	}
644 
645 	return noffset;
646 }
647 
648 /**
649  * fit_image_get_os - get os id for a given component image node
650  * @fit: pointer to the FIT format image header
651  * @noffset: component image node offset
652  * @os: pointer to the uint8_t, will hold os numeric id
653  *
654  * fit_image_get_os() finds os property in a given component image node.
655  * If the property is found, its (string) value is translated to the numeric
656  * id which is returned to the caller.
657  *
658  * returns:
659  *     0, on success
660  *     -1, on failure
661  */
662 int fit_image_get_os(const void *fit, int noffset, uint8_t *os)
663 {
664 	int len;
665 	const void *data;
666 
667 	/* Get OS name from property data */
668 	data = fdt_getprop(fit, noffset, FIT_OS_PROP, &len);
669 	if (data == NULL) {
670 		fit_get_debug(fit, noffset, FIT_OS_PROP, len);
671 		*os = -1;
672 		return -1;
673 	}
674 
675 	/* Translate OS name to id */
676 	*os = genimg_get_os_id(data);
677 	return 0;
678 }
679 
680 /**
681  * fit_image_get_arch - get arch id for a given component image node
682  * @fit: pointer to the FIT format image header
683  * @noffset: component image node offset
684  * @arch: pointer to the uint8_t, will hold arch numeric id
685  *
686  * fit_image_get_arch() finds arch property in a given component image node.
687  * If the property is found, its (string) value is translated to the numeric
688  * id which is returned to the caller.
689  *
690  * returns:
691  *     0, on success
692  *     -1, on failure
693  */
694 int fit_image_get_arch(const void *fit, int noffset, uint8_t *arch)
695 {
696 	int len;
697 	const void *data;
698 
699 	/* Get architecture name from property data */
700 	data = fdt_getprop(fit, noffset, FIT_ARCH_PROP, &len);
701 	if (data == NULL) {
702 		fit_get_debug(fit, noffset, FIT_ARCH_PROP, len);
703 		*arch = -1;
704 		return -1;
705 	}
706 
707 	/* Translate architecture name to id */
708 	*arch = genimg_get_arch_id(data);
709 	return 0;
710 }
711 
712 /**
713  * fit_image_get_type - get type id for a given component image node
714  * @fit: pointer to the FIT format image header
715  * @noffset: component image node offset
716  * @type: pointer to the uint8_t, will hold type numeric id
717  *
718  * fit_image_get_type() finds type property in a given component image node.
719  * If the property is found, its (string) value is translated to the numeric
720  * id which is returned to the caller.
721  *
722  * returns:
723  *     0, on success
724  *     -1, on failure
725  */
726 int fit_image_get_type(const void *fit, int noffset, uint8_t *type)
727 {
728 	int len;
729 	const void *data;
730 
731 	/* Get image type name from property data */
732 	data = fdt_getprop(fit, noffset, FIT_TYPE_PROP, &len);
733 	if (data == NULL) {
734 		fit_get_debug(fit, noffset, FIT_TYPE_PROP, len);
735 		*type = -1;
736 		return -1;
737 	}
738 
739 	/* Translate image type name to id */
740 	*type = genimg_get_type_id(data);
741 	return 0;
742 }
743 
744 /**
745  * fit_image_get_comp - get comp id for a given component image node
746  * @fit: pointer to the FIT format image header
747  * @noffset: component image node offset
748  * @comp: pointer to the uint8_t, will hold comp numeric id
749  *
750  * fit_image_get_comp() finds comp property in a given component image node.
751  * If the property is found, its (string) value is translated to the numeric
752  * id which is returned to the caller.
753  *
754  * returns:
755  *     0, on success
756  *     -1, on failure
757  */
758 int fit_image_get_comp(const void *fit, int noffset, uint8_t *comp)
759 {
760 	int len;
761 	const void *data;
762 
763 	/* Get compression name from property data */
764 	data = fdt_getprop(fit, noffset, FIT_COMP_PROP, &len);
765 	if (data == NULL) {
766 		fit_get_debug(fit, noffset, FIT_COMP_PROP, len);
767 		*comp = -1;
768 		return -1;
769 	}
770 
771 	/* Translate compression name to id */
772 	*comp = genimg_get_comp_id(data);
773 	return 0;
774 }
775 
776 static int fit_image_get_address(const void *fit, int noffset, char *name,
777 			  ulong *load)
778 {
779 	int len, cell_len;
780 	const fdt32_t *cell;
781 	uint64_t load64 = 0;
782 
783 	cell = fdt_getprop(fit, noffset, name, &len);
784 	if (cell == NULL) {
785 		fit_get_debug(fit, noffset, name, len);
786 		return -1;
787 	}
788 
789 	if (len > sizeof(ulong)) {
790 		printf("Unsupported %s address size\n", name);
791 		return -1;
792 	}
793 
794 	cell_len = len >> 2;
795 	/* Use load64 to avoid compiling warning for 32-bit target */
796 	while (cell_len--) {
797 		load64 = (load64 << 32) | uimage_to_cpu(*cell);
798 		cell++;
799 	}
800 	*load = (ulong)load64;
801 
802 	return 0;
803 }
804 /**
805  * fit_image_get_load() - get load addr property for given component image node
806  * @fit: pointer to the FIT format image header
807  * @noffset: component image node offset
808  * @load: pointer to the uint32_t, will hold load address
809  *
810  * fit_image_get_load() finds load address property in a given component
811  * image node. If the property is found, its value is returned to the caller.
812  *
813  * returns:
814  *     0, on success
815  *     -1, on failure
816  */
817 int fit_image_get_load(const void *fit, int noffset, ulong *load)
818 {
819 	return fit_image_get_address(fit, noffset, FIT_LOAD_PROP, load);
820 }
821 
822 /**
823  * fit_image_get_entry() - get entry point address property
824  * @fit: pointer to the FIT format image header
825  * @noffset: component image node offset
826  * @entry: pointer to the uint32_t, will hold entry point address
827  *
828  * This gets the entry point address property for a given component image
829  * node.
830  *
831  * fit_image_get_entry() finds entry point address property in a given
832  * component image node.  If the property is found, its value is returned
833  * to the caller.
834  *
835  * returns:
836  *     0, on success
837  *     -1, on failure
838  */
839 int fit_image_get_entry(const void *fit, int noffset, ulong *entry)
840 {
841 	return fit_image_get_address(fit, noffset, FIT_ENTRY_PROP, entry);
842 }
843 
844 /**
845  * fit_image_get_data - get data property and its size for a given component image node
846  * @fit: pointer to the FIT format image header
847  * @noffset: component image node offset
848  * @data: double pointer to void, will hold data property's data address
849  * @size: pointer to size_t, will hold data property's data size
850  *
851  * fit_image_get_data() finds data property in a given component image node.
852  * If the property is found its data start address and size are returned to
853  * the caller.
854  *
855  * returns:
856  *     0, on success
857  *     -1, on failure
858  */
859 int fit_image_get_data(const void *fit, int noffset,
860 		const void **data, size_t *size)
861 {
862 	int len;
863 
864 	*data = fdt_getprop(fit, noffset, FIT_DATA_PROP, &len);
865 	if (*data == NULL) {
866 		fit_get_debug(fit, noffset, FIT_DATA_PROP, len);
867 		*size = 0;
868 		return -1;
869 	}
870 
871 	*size = len;
872 	return 0;
873 }
874 
875 /**
876  * Get 'data-offset' property from a given image node.
877  *
878  * @fit: pointer to the FIT image header
879  * @noffset: component image node offset
880  * @data_offset: holds the data-offset property
881  *
882  * returns:
883  *     0, on success
884  *     -ENOENT if the property could not be found
885  */
886 int fit_image_get_data_offset(const void *fit, int noffset, int *data_offset)
887 {
888 	const fdt32_t *val;
889 
890 	val = fdt_getprop(fit, noffset, FIT_DATA_OFFSET_PROP, NULL);
891 	if (!val)
892 		return -ENOENT;
893 
894 	*data_offset = fdt32_to_cpu(*val);
895 
896 	return 0;
897 }
898 
899 /**
900  * Get 'data-position' property from a given image node.
901  *
902  * @fit: pointer to the FIT image header
903  * @noffset: component image node offset
904  * @data_position: holds the data-position property
905  *
906  * returns:
907  *     0, on success
908  *     -ENOENT if the property could not be found
909  */
910 int fit_image_get_data_position(const void *fit, int noffset,
911 				int *data_position)
912 {
913 	const fdt32_t *val;
914 
915 	val = fdt_getprop(fit, noffset, FIT_DATA_POSITION_PROP, NULL);
916 	if (!val)
917 		return -ENOENT;
918 
919 	*data_position = fdt32_to_cpu(*val);
920 
921 	return 0;
922 }
923 
924 /**
925  * Get 'data-size' property from a given image node.
926  *
927  * @fit: pointer to the FIT image header
928  * @noffset: component image node offset
929  * @data_size: holds the data-size property
930  *
931  * returns:
932  *     0, on success
933  *     -ENOENT if the property could not be found
934  */
935 int fit_image_get_data_size(const void *fit, int noffset, int *data_size)
936 {
937 	const fdt32_t *val;
938 
939 	val = fdt_getprop(fit, noffset, FIT_DATA_SIZE_PROP, NULL);
940 	if (!val)
941 		return -ENOENT;
942 
943 	*data_size = fdt32_to_cpu(*val);
944 
945 	return 0;
946 }
947 
948 /**
949  * fit_image_get_data_and_size - get data and its size including
950  *				 both embedded and external data
951  * @fit: pointer to the FIT format image header
952  * @noffset: component image node offset
953  * @data: double pointer to void, will hold data property's data address
954  * @size: pointer to size_t, will hold data property's data size
955  *
956  * fit_image_get_data_and_size() finds data and its size including
957  * both embedded and external data. If the property is found
958  * its data start address and size are returned to the caller.
959  *
960  * returns:
961  *     0, on success
962  *     otherwise, on failure
963  */
964 int fit_image_get_data_and_size(const void *fit, int noffset,
965 				const void **data, size_t *size)
966 {
967 	bool external_data = false;
968 	int offset;
969 	int len;
970 	int ret;
971 
972 	if (!fit_image_get_data_position(fit, noffset, &offset)) {
973 		external_data = true;
974 	} else if (!fit_image_get_data_offset(fit, noffset, &offset)) {
975 		external_data = true;
976 		/*
977 		 * For FIT with external data, figure out where
978 		 * the external images start. This is the base
979 		 * for the data-offset properties in each image.
980 		 */
981 		offset += ((fdt_totalsize(fit) + 3) & ~3);
982 	}
983 
984 	if (external_data) {
985 		debug("External Data\n");
986 		ret = fit_image_get_data_size(fit, noffset, &len);
987 		*data = fit + offset;
988 		*size = len;
989 	} else {
990 		ret = fit_image_get_data(fit, noffset, data, size);
991 	}
992 
993 	return ret;
994 }
995 
996 /**
997  * fit_image_hash_get_algo - get hash algorithm name
998  * @fit: pointer to the FIT format image header
999  * @noffset: hash node offset
1000  * @algo: double pointer to char, will hold pointer to the algorithm name
1001  *
1002  * fit_image_hash_get_algo() finds hash algorithm property in a given hash node.
1003  * If the property is found its data start address is returned to the caller.
1004  *
1005  * returns:
1006  *     0, on success
1007  *     -1, on failure
1008  */
1009 int fit_image_hash_get_algo(const void *fit, int noffset, char **algo)
1010 {
1011 	int len;
1012 
1013 	*algo = (char *)fdt_getprop(fit, noffset, FIT_ALGO_PROP, &len);
1014 	if (*algo == NULL) {
1015 		fit_get_debug(fit, noffset, FIT_ALGO_PROP, len);
1016 		return -1;
1017 	}
1018 
1019 	return 0;
1020 }
1021 
1022 /**
1023  * fit_image_hash_get_value - get hash value and length
1024  * @fit: pointer to the FIT format image header
1025  * @noffset: hash node offset
1026  * @value: double pointer to uint8_t, will hold address of a hash value data
1027  * @value_len: pointer to an int, will hold hash data length
1028  *
1029  * fit_image_hash_get_value() finds hash value property in a given hash node.
1030  * If the property is found its data start address and size are returned to
1031  * the caller.
1032  *
1033  * returns:
1034  *     0, on success
1035  *     -1, on failure
1036  */
1037 int fit_image_hash_get_value(const void *fit, int noffset, uint8_t **value,
1038 				int *value_len)
1039 {
1040 	int len;
1041 
1042 	*value = (uint8_t *)fdt_getprop(fit, noffset, FIT_VALUE_PROP, &len);
1043 	if (*value == NULL) {
1044 		fit_get_debug(fit, noffset, FIT_VALUE_PROP, len);
1045 		*value_len = 0;
1046 		return -1;
1047 	}
1048 
1049 	*value_len = len;
1050 	return 0;
1051 }
1052 
1053 /**
1054  * fit_image_hash_get_ignore - get hash ignore flag
1055  * @fit: pointer to the FIT format image header
1056  * @noffset: hash node offset
1057  * @ignore: pointer to an int, will hold hash ignore flag
1058  *
1059  * fit_image_hash_get_ignore() finds hash ignore property in a given hash node.
1060  * If the property is found and non-zero, the hash algorithm is not verified by
1061  * u-boot automatically.
1062  *
1063  * returns:
1064  *     0, on ignore not found
1065  *     value, on ignore found
1066  */
1067 static int fit_image_hash_get_ignore(const void *fit, int noffset, int *ignore)
1068 {
1069 	int len;
1070 	int *value;
1071 
1072 	value = (int *)fdt_getprop(fit, noffset, FIT_IGNORE_PROP, &len);
1073 	if (value == NULL || len != sizeof(int))
1074 		*ignore = 0;
1075 	else
1076 		*ignore = *value;
1077 
1078 	return 0;
1079 }
1080 
1081 ulong fit_get_end(const void *fit)
1082 {
1083 	return map_to_sysmem((void *)(fit + fdt_totalsize(fit)));
1084 }
1085 
1086 /**
1087  * fit_set_timestamp - set node timestamp property
1088  * @fit: pointer to the FIT format image header
1089  * @noffset: node offset
1090  * @timestamp: timestamp value to be set
1091  *
1092  * fit_set_timestamp() attempts to set timestamp property in the requested
1093  * node and returns operation status to the caller.
1094  *
1095  * returns:
1096  *     0, on success
1097  *     -ENOSPC if no space in device tree, -1 for other error
1098  */
1099 int fit_set_timestamp(void *fit, int noffset, time_t timestamp)
1100 {
1101 	uint32_t t;
1102 	int ret;
1103 
1104 	t = cpu_to_uimage(timestamp);
1105 	ret = fdt_setprop(fit, noffset, FIT_TIMESTAMP_PROP, &t,
1106 				sizeof(uint32_t));
1107 	if (ret) {
1108 		debug("Can't set '%s' property for '%s' node (%s)\n",
1109 		      FIT_TIMESTAMP_PROP, fit_get_name(fit, noffset, NULL),
1110 		      fdt_strerror(ret));
1111 		return ret == -FDT_ERR_NOSPACE ? -ENOSPC : -1;
1112 	}
1113 
1114 	return 0;
1115 }
1116 
1117 /**
1118  * calculate_hash - calculate and return hash for provided input data
1119  * @data: pointer to the input data
1120  * @data_len: data length
1121  * @algo: requested hash algorithm
1122  * @value: pointer to the char, will hold hash value data (caller must
1123  * allocate enough free space)
1124  * value_len: length of the calculated hash
1125  *
1126  * calculate_hash() computes input data hash according to the requested
1127  * algorithm.
1128  * Resulting hash value is placed in caller provided 'value' buffer, length
1129  * of the calculated hash is returned via value_len pointer argument.
1130  *
1131  * returns:
1132  *     0, on success
1133  *    -1, when algo is unsupported
1134  */
1135 int calculate_hash(const void *data, int data_len, const char *algo,
1136 			uint8_t *value, int *value_len)
1137 {
1138 	if (IMAGE_ENABLE_CRC32 && strcmp(algo, "crc32") == 0) {
1139 		*((uint32_t *)value) = crc32_wd(0, data, data_len,
1140 							CHUNKSZ_CRC32);
1141 		*((uint32_t *)value) = cpu_to_uimage(*((uint32_t *)value));
1142 		*value_len = 4;
1143 	} else if (IMAGE_ENABLE_SHA1 && strcmp(algo, "sha1") == 0) {
1144 		sha1_csum_wd((unsigned char *)data, data_len,
1145 			     (unsigned char *)value, CHUNKSZ_SHA1);
1146 		*value_len = 20;
1147 	} else if (IMAGE_ENABLE_SHA256 && strcmp(algo, "sha256") == 0) {
1148 		sha256_csum_wd((unsigned char *)data, data_len,
1149 			       (unsigned char *)value, CHUNKSZ_SHA256);
1150 		*value_len = SHA256_SUM_LEN;
1151 	} else if (IMAGE_ENABLE_MD5 && strcmp(algo, "md5") == 0) {
1152 		md5_wd((unsigned char *)data, data_len, value, CHUNKSZ_MD5);
1153 		*value_len = 16;
1154 	} else {
1155 		debug("Unsupported hash alogrithm\n");
1156 		return -1;
1157 	}
1158 	return 0;
1159 }
1160 
1161 static int fit_image_check_hash(const void *fit, int noffset, const void *data,
1162 				size_t size, char **err_msgp)
1163 {
1164 	uint8_t value[FIT_MAX_HASH_LEN];
1165 	int value_len;
1166 	char *algo;
1167 	uint8_t *fit_value;
1168 	int fit_value_len;
1169 	int ignore;
1170 
1171 	*err_msgp = NULL;
1172 
1173 	if (fit_image_hash_get_algo(fit, noffset, &algo)) {
1174 		*err_msgp = "Can't get hash algo property";
1175 		return -1;
1176 	}
1177 	printf("%s", algo);
1178 
1179 	if (IMAGE_ENABLE_IGNORE) {
1180 		fit_image_hash_get_ignore(fit, noffset, &ignore);
1181 		if (ignore) {
1182 			printf("-skipped ");
1183 			return 0;
1184 		}
1185 	}
1186 
1187 	if (fit_image_hash_get_value(fit, noffset, &fit_value,
1188 				     &fit_value_len)) {
1189 		*err_msgp = "Can't get hash value property";
1190 		return -1;
1191 	}
1192 
1193 	if (calculate_hash(data, size, algo, value, &value_len)) {
1194 		*err_msgp = "Unsupported hash algorithm";
1195 		return -1;
1196 	}
1197 
1198 	if (value_len != fit_value_len) {
1199 		*err_msgp = "Bad hash value len";
1200 		return -1;
1201 	} else if (memcmp(value, fit_value, value_len) != 0) {
1202 		*err_msgp = "Bad hash value";
1203 		return -1;
1204 	}
1205 
1206 	return 0;
1207 }
1208 
1209 int fit_image_verify_with_data(const void *fit, int image_noffset,
1210 			       const void *data, size_t size)
1211 {
1212 	int		noffset = 0;
1213 	char		*err_msg = "";
1214 	int verify_all = 1;
1215 	int ret;
1216 
1217 	/* Verify all required signatures */
1218 	if (IMAGE_ENABLE_VERIFY &&
1219 	    fit_image_verify_required_sigs(fit, image_noffset, data, size,
1220 					   gd_fdt_blob(), &verify_all)) {
1221 		err_msg = "Unable to verify required signature";
1222 		goto error;
1223 	}
1224 
1225 	/* Process all hash subnodes of the component image node */
1226 	fdt_for_each_subnode(noffset, fit, image_noffset) {
1227 		const char *name = fit_get_name(fit, noffset, NULL);
1228 
1229 		/*
1230 		 * Check subnode name, must be equal to "hash".
1231 		 * Multiple hash nodes require unique unit node
1232 		 * names, e.g. hash-1, hash-2, etc.
1233 		 */
1234 		if (!strncmp(name, FIT_HASH_NODENAME,
1235 			     strlen(FIT_HASH_NODENAME))) {
1236 			if (fit_image_check_hash(fit, noffset, data, size,
1237 						 &err_msg))
1238 				goto error;
1239 			puts("+ ");
1240 		} else if (IMAGE_ENABLE_VERIFY && verify_all &&
1241 				!strncmp(name, FIT_SIG_NODENAME,
1242 					strlen(FIT_SIG_NODENAME))) {
1243 			ret = fit_image_check_sig(fit, noffset, data,
1244 							size, -1, &err_msg);
1245 
1246 			/*
1247 			 * Show an indication on failure, but do not return
1248 			 * an error. Only keys marked 'required' can cause
1249 			 * an image validation failure. See the call to
1250 			 * fit_image_verify_required_sigs() above.
1251 			 */
1252 			if (ret)
1253 				puts("- ");
1254 			else
1255 				puts("+ ");
1256 		}
1257 	}
1258 
1259 	if (noffset == -FDT_ERR_TRUNCATED || noffset == -FDT_ERR_BADSTRUCTURE) {
1260 		err_msg = "Corrupted or truncated tree";
1261 		goto error;
1262 	}
1263 
1264 	return 1;
1265 
1266 error:
1267 	printf(" error!\n%s for '%s' hash node in '%s' image node\n",
1268 	       err_msg, fit_get_name(fit, noffset, NULL),
1269 	       fit_get_name(fit, image_noffset, NULL));
1270 	return 0;
1271 }
1272 
1273 /**
1274  * fit_image_verify - verify data integrity
1275  * @fit: pointer to the FIT format image header
1276  * @image_noffset: component image node offset
1277  *
1278  * fit_image_verify() goes over component image hash nodes,
1279  * re-calculates each data hash and compares with the value stored in hash
1280  * node.
1281  *
1282  * returns:
1283  *     1, if all hashes are valid
1284  *     0, otherwise (or on error)
1285  */
1286 int fit_image_verify(const void *fit, int image_noffset)
1287 {
1288 	const void	*data;
1289 	size_t		size;
1290 	int		noffset = 0;
1291 	char		*err_msg = "";
1292 
1293 	/* Get image data and data length */
1294 	if (fit_image_get_data_and_size(fit, image_noffset, &data, &size)) {
1295 		err_msg = "Can't get image data/size";
1296 		printf("error!\n%s for '%s' hash node in '%s' image node\n",
1297 		       err_msg, fit_get_name(fit, noffset, NULL),
1298 		       fit_get_name(fit, image_noffset, NULL));
1299 		return 0;
1300 	}
1301 
1302 	return fit_image_verify_with_data(fit, image_noffset, data, size);
1303 }
1304 
1305 /**
1306  * fit_all_image_verify - verify data integrity for all images
1307  * @fit: pointer to the FIT format image header
1308  *
1309  * fit_all_image_verify() goes over all images in the FIT and
1310  * for every images checks if all it's hashes are valid.
1311  *
1312  * returns:
1313  *     1, if all hashes of all images are valid
1314  *     0, otherwise (or on error)
1315  */
1316 int fit_all_image_verify(const void *fit)
1317 {
1318 	int images_noffset;
1319 	int noffset;
1320 	int ndepth;
1321 	int count;
1322 
1323 	/* Find images parent node offset */
1324 	images_noffset = fdt_path_offset(fit, FIT_IMAGES_PATH);
1325 	if (images_noffset < 0) {
1326 		printf("Can't find images parent node '%s' (%s)\n",
1327 		       FIT_IMAGES_PATH, fdt_strerror(images_noffset));
1328 		return 0;
1329 	}
1330 
1331 	/* Process all image subnodes, check hashes for each */
1332 	printf("## Checking hash(es) for FIT Image at %08lx ...\n",
1333 	       (ulong)fit);
1334 	for (ndepth = 0, count = 0,
1335 	     noffset = fdt_next_node(fit, images_noffset, &ndepth);
1336 			(noffset >= 0) && (ndepth > 0);
1337 			noffset = fdt_next_node(fit, noffset, &ndepth)) {
1338 		if (ndepth == 1) {
1339 			/*
1340 			 * Direct child node of the images parent node,
1341 			 * i.e. component image node.
1342 			 */
1343 			printf("   Hash(es) for Image %u (%s): ", count,
1344 			       fit_get_name(fit, noffset, NULL));
1345 			count++;
1346 
1347 			if (!fit_image_verify(fit, noffset))
1348 				return 0;
1349 			printf("\n");
1350 		}
1351 	}
1352 	return 1;
1353 }
1354 
1355 /**
1356  * fit_image_check_os - check whether image node is of a given os type
1357  * @fit: pointer to the FIT format image header
1358  * @noffset: component image node offset
1359  * @os: requested image os
1360  *
1361  * fit_image_check_os() reads image os property and compares its numeric
1362  * id with the requested os. Comparison result is returned to the caller.
1363  *
1364  * returns:
1365  *     1 if image is of given os type
1366  *     0 otherwise (or on error)
1367  */
1368 int fit_image_check_os(const void *fit, int noffset, uint8_t os)
1369 {
1370 	uint8_t image_os;
1371 
1372 	if (fit_image_get_os(fit, noffset, &image_os))
1373 		return 0;
1374 	return (os == image_os);
1375 }
1376 
1377 /**
1378  * fit_image_check_arch - check whether image node is of a given arch
1379  * @fit: pointer to the FIT format image header
1380  * @noffset: component image node offset
1381  * @arch: requested imagearch
1382  *
1383  * fit_image_check_arch() reads image arch property and compares its numeric
1384  * id with the requested arch. Comparison result is returned to the caller.
1385  *
1386  * returns:
1387  *     1 if image is of given arch
1388  *     0 otherwise (or on error)
1389  */
1390 int fit_image_check_arch(const void *fit, int noffset, uint8_t arch)
1391 {
1392 	uint8_t image_arch;
1393 	int aarch32_support = 0;
1394 
1395 #ifdef CONFIG_ARM64_SUPPORT_AARCH32
1396 	aarch32_support = 1;
1397 #endif
1398 
1399 	if (fit_image_get_arch(fit, noffset, &image_arch))
1400 		return 0;
1401 	return (arch == image_arch) ||
1402 		(arch == IH_ARCH_I386 && image_arch == IH_ARCH_X86_64) ||
1403 		(arch == IH_ARCH_ARM64 && image_arch == IH_ARCH_ARM &&
1404 		 aarch32_support);
1405 }
1406 
1407 /**
1408  * fit_image_check_type - check whether image node is of a given type
1409  * @fit: pointer to the FIT format image header
1410  * @noffset: component image node offset
1411  * @type: requested image type
1412  *
1413  * fit_image_check_type() reads image type property and compares its numeric
1414  * id with the requested type. Comparison result is returned to the caller.
1415  *
1416  * returns:
1417  *     1 if image is of given type
1418  *     0 otherwise (or on error)
1419  */
1420 int fit_image_check_type(const void *fit, int noffset, uint8_t type)
1421 {
1422 	uint8_t image_type;
1423 
1424 	if (fit_image_get_type(fit, noffset, &image_type))
1425 		return 0;
1426 	return (type == image_type);
1427 }
1428 
1429 /**
1430  * fit_image_check_comp - check whether image node uses given compression
1431  * @fit: pointer to the FIT format image header
1432  * @noffset: component image node offset
1433  * @comp: requested image compression type
1434  *
1435  * fit_image_check_comp() reads image compression property and compares its
1436  * numeric id with the requested compression type. Comparison result is
1437  * returned to the caller.
1438  *
1439  * returns:
1440  *     1 if image uses requested compression
1441  *     0 otherwise (or on error)
1442  */
1443 int fit_image_check_comp(const void *fit, int noffset, uint8_t comp)
1444 {
1445 	uint8_t image_comp;
1446 
1447 	if (fit_image_get_comp(fit, noffset, &image_comp))
1448 		return 0;
1449 	return (comp == image_comp);
1450 }
1451 
1452 /**
1453  * fit_check_format - sanity check FIT image format
1454  * @fit: pointer to the FIT format image header
1455  *
1456  * fit_check_format() runs a basic sanity FIT image verification.
1457  * Routine checks for mandatory properties, nodes, etc.
1458  *
1459  * returns:
1460  *     1, on success
1461  *     0, on failure
1462  */
1463 int fit_check_format(const void *fit)
1464 {
1465 	/* mandatory / node 'description' property */
1466 	if (fdt_getprop(fit, 0, FIT_DESC_PROP, NULL) == NULL) {
1467 		debug("Wrong FIT format: no description\n");
1468 		return 0;
1469 	}
1470 
1471 	if (IMAGE_ENABLE_TIMESTAMP) {
1472 		/* mandatory / node 'timestamp' property */
1473 		if (fdt_getprop(fit, 0, FIT_TIMESTAMP_PROP, NULL) == NULL) {
1474 			debug("Wrong FIT format: no timestamp\n");
1475 			return 0;
1476 		}
1477 	}
1478 
1479 	/* mandatory subimages parent '/images' node */
1480 	if (fdt_path_offset(fit, FIT_IMAGES_PATH) < 0) {
1481 		debug("Wrong FIT format: no images parent node\n");
1482 		return 0;
1483 	}
1484 
1485 	return 1;
1486 }
1487 
1488 
1489 /**
1490  * fit_conf_find_compat
1491  * @fit: pointer to the FIT format image header
1492  * @fdt: pointer to the device tree to compare against
1493  *
1494  * fit_conf_find_compat() attempts to find the configuration whose fdt is the
1495  * most compatible with the passed in device tree.
1496  *
1497  * Example:
1498  *
1499  * / o image-tree
1500  *   |-o images
1501  *   | |-o fdt-1
1502  *   | |-o fdt-2
1503  *   |
1504  *   |-o configurations
1505  *     |-o config-1
1506  *     | |-fdt = fdt-1
1507  *     |
1508  *     |-o config-2
1509  *       |-fdt = fdt-2
1510  *
1511  * / o U-Boot fdt
1512  *   |-compatible = "foo,bar", "bim,bam"
1513  *
1514  * / o kernel fdt1
1515  *   |-compatible = "foo,bar",
1516  *
1517  * / o kernel fdt2
1518  *   |-compatible = "bim,bam", "baz,biz"
1519  *
1520  * Configuration 1 would be picked because the first string in U-Boot's
1521  * compatible list, "foo,bar", matches a compatible string in the root of fdt1.
1522  * "bim,bam" in fdt2 matches the second string which isn't as good as fdt1.
1523  *
1524  * returns:
1525  *     offset to the configuration to use if one was found
1526  *     -1 otherwise
1527  */
1528 int fit_conf_find_compat(const void *fit, const void *fdt)
1529 {
1530 	int ndepth = 0;
1531 	int noffset, confs_noffset, images_noffset;
1532 	const void *fdt_compat;
1533 	int fdt_compat_len;
1534 	int best_match_offset = 0;
1535 	int best_match_pos = 0;
1536 
1537 	confs_noffset = fdt_path_offset(fit, FIT_CONFS_PATH);
1538 	images_noffset = fdt_path_offset(fit, FIT_IMAGES_PATH);
1539 	if (confs_noffset < 0 || images_noffset < 0) {
1540 		debug("Can't find configurations or images nodes.\n");
1541 		return -1;
1542 	}
1543 
1544 	fdt_compat = fdt_getprop(fdt, 0, "compatible", &fdt_compat_len);
1545 	if (!fdt_compat) {
1546 		debug("Fdt for comparison has no \"compatible\" property.\n");
1547 		return -1;
1548 	}
1549 
1550 	/*
1551 	 * Loop over the configurations in the FIT image.
1552 	 */
1553 	for (noffset = fdt_next_node(fit, confs_noffset, &ndepth);
1554 			(noffset >= 0) && (ndepth > 0);
1555 			noffset = fdt_next_node(fit, noffset, &ndepth)) {
1556 		const void *kfdt;
1557 		const char *kfdt_name;
1558 		int kfdt_noffset;
1559 		const char *cur_fdt_compat;
1560 		int len;
1561 		size_t size;
1562 		int i;
1563 
1564 		if (ndepth > 1)
1565 			continue;
1566 
1567 		kfdt_name = fdt_getprop(fit, noffset, "fdt", &len);
1568 		if (!kfdt_name) {
1569 			debug("No fdt property found.\n");
1570 			continue;
1571 		}
1572 		kfdt_noffset = fdt_subnode_offset(fit, images_noffset,
1573 						  kfdt_name);
1574 		if (kfdt_noffset < 0) {
1575 			debug("No image node named \"%s\" found.\n",
1576 			      kfdt_name);
1577 			continue;
1578 		}
1579 		/*
1580 		 * Get a pointer to this configuration's fdt.
1581 		 */
1582 		if (fit_image_get_data(fit, kfdt_noffset, &kfdt, &size)) {
1583 			debug("Failed to get fdt \"%s\".\n", kfdt_name);
1584 			continue;
1585 		}
1586 
1587 		len = fdt_compat_len;
1588 		cur_fdt_compat = fdt_compat;
1589 		/*
1590 		 * Look for a match for each U-Boot compatibility string in
1591 		 * turn in this configuration's fdt.
1592 		 */
1593 		for (i = 0; len > 0 &&
1594 		     (!best_match_offset || best_match_pos > i); i++) {
1595 			int cur_len = strlen(cur_fdt_compat) + 1;
1596 
1597 			if (!fdt_node_check_compatible(kfdt, 0,
1598 						       cur_fdt_compat)) {
1599 				best_match_offset = noffset;
1600 				best_match_pos = i;
1601 				break;
1602 			}
1603 			len -= cur_len;
1604 			cur_fdt_compat += cur_len;
1605 		}
1606 	}
1607 	if (!best_match_offset) {
1608 		debug("No match found.\n");
1609 		return -1;
1610 	}
1611 
1612 	return best_match_offset;
1613 }
1614 
1615 /**
1616  * fit_conf_get_node - get node offset for configuration of a given unit name
1617  * @fit: pointer to the FIT format image header
1618  * @conf_uname: configuration node unit name
1619  *
1620  * fit_conf_get_node() finds a configuration (within the '/configurations'
1621  * parent node) of a provided unit name. If configuration is found its node
1622  * offset is returned to the caller.
1623  *
1624  * When NULL is provided in second argument fit_conf_get_node() will search
1625  * for a default configuration node instead. Default configuration node unit
1626  * name is retrieved from FIT_DEFAULT_PROP property of the '/configurations'
1627  * node.
1628  *
1629  * returns:
1630  *     configuration node offset when found (>=0)
1631  *     negative number on failure (FDT_ERR_* code)
1632  */
1633 int fit_conf_get_node(const void *fit, const char *conf_uname)
1634 {
1635 	int noffset, confs_noffset;
1636 	int len;
1637 	const char *s;
1638 	char *conf_uname_copy = NULL;
1639 
1640 	confs_noffset = fdt_path_offset(fit, FIT_CONFS_PATH);
1641 	if (confs_noffset < 0) {
1642 		debug("Can't find configurations parent node '%s' (%s)\n",
1643 		      FIT_CONFS_PATH, fdt_strerror(confs_noffset));
1644 		return confs_noffset;
1645 	}
1646 
1647 	if (conf_uname == NULL) {
1648 		/* get configuration unit name from the default property */
1649 		debug("No configuration specified, trying default...\n");
1650 		conf_uname = (char *)fdt_getprop(fit, confs_noffset,
1651 						 FIT_DEFAULT_PROP, &len);
1652 		if (conf_uname == NULL) {
1653 			fit_get_debug(fit, confs_noffset, FIT_DEFAULT_PROP,
1654 				      len);
1655 			return len;
1656 		}
1657 		debug("Found default configuration: '%s'\n", conf_uname);
1658 	}
1659 
1660 	s = strchr(conf_uname, '#');
1661 	if (s) {
1662 		len = s - conf_uname;
1663 		conf_uname_copy = malloc(len + 1);
1664 		if (!conf_uname_copy) {
1665 			debug("Can't allocate uname copy: '%s'\n",
1666 					conf_uname);
1667 			return -ENOMEM;
1668 		}
1669 		memcpy(conf_uname_copy, conf_uname, len);
1670 		conf_uname_copy[len] = '\0';
1671 		conf_uname = conf_uname_copy;
1672 	}
1673 
1674 	noffset = fdt_subnode_offset(fit, confs_noffset, conf_uname);
1675 	if (noffset < 0) {
1676 		debug("Can't get node offset for configuration unit name: '%s' (%s)\n",
1677 		      conf_uname, fdt_strerror(noffset));
1678 	}
1679 
1680 	if (conf_uname_copy)
1681 		free(conf_uname_copy);
1682 
1683 	return noffset;
1684 }
1685 
1686 int fit_conf_get_prop_node_count(const void *fit, int noffset,
1687 		const char *prop_name)
1688 {
1689 	return fdt_stringlist_count(fit, noffset, prop_name);
1690 }
1691 
1692 int fit_conf_get_prop_node_index(const void *fit, int noffset,
1693 		const char *prop_name, int index)
1694 {
1695 	const char *uname;
1696 	int len;
1697 
1698 	/* get kernel image unit name from configuration kernel property */
1699 	uname = fdt_stringlist_get(fit, noffset, prop_name, index, &len);
1700 	if (uname == NULL)
1701 		return len;
1702 
1703 	return fit_image_get_node(fit, uname);
1704 }
1705 
1706 int fit_conf_get_prop_node(const void *fit, int noffset,
1707 		const char *prop_name)
1708 {
1709 	return fit_conf_get_prop_node_index(fit, noffset, prop_name, 0);
1710 }
1711 
1712 static int fit_image_select(const void *fit, int rd_noffset, int verify)
1713 {
1714 	fit_image_print(fit, rd_noffset, "   ");
1715 
1716 	if (verify) {
1717 		puts("   Verifying Hash Integrity ... ");
1718 		if (!fit_image_verify(fit, rd_noffset)) {
1719 			puts("Bad Data Hash\n");
1720 			return -EACCES;
1721 		}
1722 		puts("OK\n");
1723 	}
1724 
1725 	return 0;
1726 }
1727 
1728 int fit_get_node_from_config(bootm_headers_t *images, const char *prop_name,
1729 			ulong addr)
1730 {
1731 	int cfg_noffset;
1732 	void *fit_hdr;
1733 	int noffset;
1734 
1735 	debug("*  %s: using config '%s' from image at 0x%08lx\n",
1736 	      prop_name, images->fit_uname_cfg, addr);
1737 
1738 	/* Check whether configuration has this property defined */
1739 	fit_hdr = map_sysmem(addr, 0);
1740 	cfg_noffset = fit_conf_get_node(fit_hdr, images->fit_uname_cfg);
1741 	if (cfg_noffset < 0) {
1742 		debug("*  %s: no such config\n", prop_name);
1743 		return -EINVAL;
1744 	}
1745 
1746 	noffset = fit_conf_get_prop_node(fit_hdr, cfg_noffset, prop_name);
1747 	if (noffset < 0) {
1748 		debug("*  %s: no '%s' in config\n", prop_name, prop_name);
1749 		return -ENOENT;
1750 	}
1751 
1752 	return noffset;
1753 }
1754 
1755 /**
1756  * fit_get_image_type_property() - get property name for IH_TYPE_...
1757  *
1758  * @return the properly name where we expect to find the image in the
1759  * config node
1760  */
1761 static const char *fit_get_image_type_property(int type)
1762 {
1763 	/*
1764 	 * This is sort-of available in the uimage_type[] table in image.c
1765 	 * but we don't have access to the short name, and "fdt" is different
1766 	 * anyway. So let's just keep it here.
1767 	 */
1768 	switch (type) {
1769 	case IH_TYPE_FLATDT:
1770 		return FIT_FDT_PROP;
1771 	case IH_TYPE_KERNEL:
1772 		return FIT_KERNEL_PROP;
1773 	case IH_TYPE_RAMDISK:
1774 		return FIT_RAMDISK_PROP;
1775 	case IH_TYPE_X86_SETUP:
1776 		return FIT_SETUP_PROP;
1777 	case IH_TYPE_LOADABLE:
1778 		return FIT_LOADABLE_PROP;
1779 	case IH_TYPE_FPGA:
1780 		return FIT_FPGA_PROP;
1781 	case IH_TYPE_STANDALONE:
1782 		return FIT_STANDALONE_PROP;
1783 	}
1784 
1785 	return "unknown";
1786 }
1787 
1788 int fit_image_load(bootm_headers_t *images, ulong addr,
1789 		   const char **fit_unamep, const char **fit_uname_configp,
1790 		   int arch, int image_type, int bootstage_id,
1791 		   enum fit_load_op load_op, ulong *datap, ulong *lenp)
1792 {
1793 	int cfg_noffset, noffset;
1794 	const char *fit_uname;
1795 	const char *fit_uname_config;
1796 	const char *fit_base_uname_config;
1797 	const void *fit;
1798 	const void *buf;
1799 	size_t size;
1800 	int type_ok, os_ok;
1801 	ulong load, data, len;
1802 	uint8_t os;
1803 #ifndef USE_HOSTCC
1804 	uint8_t os_arch;
1805 #endif
1806 	const char *prop_name;
1807 	int ret;
1808 
1809 	fit = map_sysmem(addr, 0);
1810 	fit_uname = fit_unamep ? *fit_unamep : NULL;
1811 	fit_uname_config = fit_uname_configp ? *fit_uname_configp : NULL;
1812 	fit_base_uname_config = NULL;
1813 	prop_name = fit_get_image_type_property(image_type);
1814 	printf("## Loading %s from FIT Image at %08lx ...\n", prop_name, addr);
1815 
1816 	bootstage_mark(bootstage_id + BOOTSTAGE_SUB_FORMAT);
1817 	if (!fit_check_format(fit)) {
1818 		printf("Bad FIT %s image format!\n", prop_name);
1819 		bootstage_error(bootstage_id + BOOTSTAGE_SUB_FORMAT);
1820 		return -ENOEXEC;
1821 	}
1822 	bootstage_mark(bootstage_id + BOOTSTAGE_SUB_FORMAT_OK);
1823 	if (fit_uname) {
1824 		/* get FIT component image node offset */
1825 		bootstage_mark(bootstage_id + BOOTSTAGE_SUB_UNIT_NAME);
1826 		noffset = fit_image_get_node(fit, fit_uname);
1827 	} else {
1828 		/*
1829 		 * no image node unit name, try to get config
1830 		 * node first. If config unit node name is NULL
1831 		 * fit_conf_get_node() will try to find default config node
1832 		 */
1833 		bootstage_mark(bootstage_id + BOOTSTAGE_SUB_NO_UNIT_NAME);
1834 		if (IMAGE_ENABLE_BEST_MATCH && !fit_uname_config) {
1835 			cfg_noffset = fit_conf_find_compat(fit, gd_fdt_blob());
1836 		} else {
1837 			cfg_noffset = fit_conf_get_node(fit,
1838 							fit_uname_config);
1839 		}
1840 		if (cfg_noffset < 0) {
1841 			puts("Could not find configuration node\n");
1842 			bootstage_error(bootstage_id +
1843 					BOOTSTAGE_SUB_NO_UNIT_NAME);
1844 			return -ENOENT;
1845 		}
1846 
1847 		fit_base_uname_config = fdt_get_name(fit, cfg_noffset, NULL);
1848 		printf("   Using '%s' configuration\n", fit_base_uname_config);
1849 		/* Remember this config */
1850 		if (image_type == IH_TYPE_KERNEL)
1851 			images->fit_uname_cfg = fit_base_uname_config;
1852 
1853 		if (IMAGE_ENABLE_VERIFY && images->verify) {
1854 			puts("   Verifying Hash Integrity ... ");
1855 			if (fit_config_verify(fit, cfg_noffset)) {
1856 				puts("Bad Data Hash\n");
1857 				bootstage_error(bootstage_id +
1858 					BOOTSTAGE_SUB_HASH);
1859 				return -EACCES;
1860 			}
1861 			puts("OK\n");
1862 		}
1863 
1864 		bootstage_mark(BOOTSTAGE_ID_FIT_CONFIG);
1865 
1866 		noffset = fit_conf_get_prop_node(fit, cfg_noffset,
1867 						 prop_name);
1868 		fit_uname = fit_get_name(fit, noffset, NULL);
1869 	}
1870 	if (noffset < 0) {
1871 		puts("Could not find subimage node\n");
1872 		bootstage_error(bootstage_id + BOOTSTAGE_SUB_SUBNODE);
1873 		return -ENOENT;
1874 	}
1875 
1876 	printf("   Trying '%s' %s subimage\n", fit_uname, prop_name);
1877 
1878 	ret = fit_image_select(fit, noffset, images->verify);
1879 	if (ret) {
1880 		bootstage_error(bootstage_id + BOOTSTAGE_SUB_HASH);
1881 		return ret;
1882 	}
1883 
1884 	bootstage_mark(bootstage_id + BOOTSTAGE_SUB_CHECK_ARCH);
1885 #if !defined(USE_HOSTCC) && !defined(CONFIG_SANDBOX)
1886 	if (!fit_image_check_target_arch(fit, noffset)) {
1887 		puts("Unsupported Architecture\n");
1888 		bootstage_error(bootstage_id + BOOTSTAGE_SUB_CHECK_ARCH);
1889 		return -ENOEXEC;
1890 	}
1891 #endif
1892 
1893 #ifndef USE_HOSTCC
1894 	fit_image_get_arch(fit, noffset, &os_arch);
1895 	images->os.arch = os_arch;
1896 #endif
1897 
1898 	if (image_type == IH_TYPE_FLATDT &&
1899 	    !fit_image_check_comp(fit, noffset, IH_COMP_NONE)) {
1900 		puts("FDT image is compressed");
1901 		return -EPROTONOSUPPORT;
1902 	}
1903 
1904 	bootstage_mark(bootstage_id + BOOTSTAGE_SUB_CHECK_ALL);
1905 	type_ok = fit_image_check_type(fit, noffset, image_type) ||
1906 		  fit_image_check_type(fit, noffset, IH_TYPE_FIRMWARE) ||
1907 		  (image_type == IH_TYPE_KERNEL &&
1908 		   fit_image_check_type(fit, noffset, IH_TYPE_KERNEL_NOLOAD));
1909 
1910 	os_ok = image_type == IH_TYPE_FLATDT ||
1911 		image_type == IH_TYPE_FPGA ||
1912 		fit_image_check_os(fit, noffset, IH_OS_LINUX) ||
1913 		fit_image_check_os(fit, noffset, IH_OS_U_BOOT) ||
1914 		fit_image_check_os(fit, noffset, IH_OS_OPENRTOS);
1915 
1916 	/*
1917 	 * If either of the checks fail, we should report an error, but
1918 	 * if the image type is coming from the "loadables" field, we
1919 	 * don't care what it is
1920 	 */
1921 	if ((!type_ok || !os_ok) && image_type != IH_TYPE_LOADABLE) {
1922 		fit_image_get_os(fit, noffset, &os);
1923 		printf("No %s %s %s Image\n",
1924 		       genimg_get_os_name(os),
1925 		       genimg_get_arch_name(arch),
1926 		       genimg_get_type_name(image_type));
1927 		bootstage_error(bootstage_id + BOOTSTAGE_SUB_CHECK_ALL);
1928 		return -EIO;
1929 	}
1930 
1931 	bootstage_mark(bootstage_id + BOOTSTAGE_SUB_CHECK_ALL_OK);
1932 
1933 	/* get image data address and length */
1934 	if (fit_image_get_data_and_size(fit, noffset, &buf, &size)) {
1935 		printf("Could not find %s subimage data!\n", prop_name);
1936 		bootstage_error(bootstage_id + BOOTSTAGE_SUB_GET_DATA);
1937 		return -ENOENT;
1938 	}
1939 
1940 #if !defined(USE_HOSTCC) && defined(CONFIG_FIT_IMAGE_POST_PROCESS)
1941 	/* perform any post-processing on the image data */
1942 	board_fit_image_post_process((void **)&buf, &size);
1943 #endif
1944 
1945 	len = (ulong)size;
1946 
1947 	/* verify that image data is a proper FDT blob */
1948 	if (image_type == IH_TYPE_FLATDT && fdt_check_header(buf)) {
1949 		puts("Subimage data is not a FDT");
1950 		return -ENOEXEC;
1951 	}
1952 
1953 	bootstage_mark(bootstage_id + BOOTSTAGE_SUB_GET_DATA_OK);
1954 
1955 	/*
1956 	 * Work-around for eldk-4.2 which gives this warning if we try to
1957 	 * cast in the unmap_sysmem() call:
1958 	 * warning: initialization discards qualifiers from pointer target type
1959 	 */
1960 	{
1961 		void *vbuf = (void *)buf;
1962 
1963 		data = map_to_sysmem(vbuf);
1964 	}
1965 
1966 	if (load_op == FIT_LOAD_IGNORED) {
1967 		/* Don't load */
1968 	} else if (fit_image_get_load(fit, noffset, &load)) {
1969 		if (load_op == FIT_LOAD_REQUIRED) {
1970 			printf("Can't get %s subimage load address!\n",
1971 			       prop_name);
1972 			bootstage_error(bootstage_id + BOOTSTAGE_SUB_LOAD);
1973 			return -EBADF;
1974 		}
1975 	} else if (load_op != FIT_LOAD_OPTIONAL_NON_ZERO || load) {
1976 		ulong image_start, image_end;
1977 		ulong load_end;
1978 		void *dst;
1979 
1980 		/*
1981 		 * move image data to the load address,
1982 		 * make sure we don't overwrite initial image
1983 		 */
1984 		image_start = addr;
1985 		image_end = addr + fit_get_size(fit);
1986 
1987 		load_end = load + len;
1988 		if (image_type != IH_TYPE_KERNEL &&
1989 		    load < image_end && load_end > image_start) {
1990 			printf("Error: %s overwritten\n", prop_name);
1991 			return -EXDEV;
1992 		}
1993 
1994 		printf("   Loading %s from 0x%08lx to 0x%08lx\n",
1995 		       prop_name, data, load);
1996 
1997 		dst = map_sysmem(load, len);
1998 		memmove(dst, buf, len);
1999 		data = load;
2000 	}
2001 	bootstage_mark(bootstage_id + BOOTSTAGE_SUB_LOAD);
2002 
2003 	*datap = data;
2004 	*lenp = len;
2005 	if (fit_unamep)
2006 		*fit_unamep = (char *)fit_uname;
2007 	if (fit_uname_configp)
2008 		*fit_uname_configp = (char *)(fit_uname_config ? :
2009 					      fit_base_uname_config);
2010 
2011 	return noffset;
2012 }
2013 
2014 int boot_get_setup_fit(bootm_headers_t *images, uint8_t arch,
2015 			ulong *setup_start, ulong *setup_len)
2016 {
2017 	int noffset;
2018 	ulong addr;
2019 	ulong len;
2020 	int ret;
2021 
2022 	addr = map_to_sysmem(images->fit_hdr_os);
2023 	noffset = fit_get_node_from_config(images, FIT_SETUP_PROP, addr);
2024 	if (noffset < 0)
2025 		return noffset;
2026 
2027 	ret = fit_image_load(images, addr, NULL, NULL, arch,
2028 			     IH_TYPE_X86_SETUP, BOOTSTAGE_ID_FIT_SETUP_START,
2029 			     FIT_LOAD_REQUIRED, setup_start, &len);
2030 
2031 	return ret;
2032 }
2033 
2034 #ifndef USE_HOSTCC
2035 int boot_get_fdt_fit(bootm_headers_t *images, ulong addr,
2036 		   const char **fit_unamep, const char **fit_uname_configp,
2037 		   int arch, ulong *datap, ulong *lenp)
2038 {
2039 	int fdt_noffset, cfg_noffset, count;
2040 	const void *fit;
2041 	const char *fit_uname = NULL;
2042 	const char *fit_uname_config = NULL;
2043 	char *fit_uname_config_copy = NULL;
2044 	char *next_config = NULL;
2045 	ulong load, len;
2046 #ifdef CONFIG_OF_LIBFDT_OVERLAY
2047 	ulong image_start, image_end;
2048 	ulong ovload, ovlen;
2049 	const char *uconfig;
2050 	const char *uname;
2051 	void *base, *ov;
2052 	int i, err, noffset, ov_noffset;
2053 #endif
2054 
2055 	fit_uname = fit_unamep ? *fit_unamep : NULL;
2056 
2057 	if (fit_uname_configp && *fit_uname_configp) {
2058 		fit_uname_config_copy = strdup(*fit_uname_configp);
2059 		if (!fit_uname_config_copy)
2060 			return -ENOMEM;
2061 
2062 		next_config = strchr(fit_uname_config_copy, '#');
2063 		if (next_config)
2064 			*next_config++ = '\0';
2065 		if (next_config - 1 > fit_uname_config_copy)
2066 			fit_uname_config = fit_uname_config_copy;
2067 	}
2068 
2069 	fdt_noffset = fit_image_load(images,
2070 		addr, &fit_uname, &fit_uname_config,
2071 		arch, IH_TYPE_FLATDT,
2072 		BOOTSTAGE_ID_FIT_FDT_START,
2073 		FIT_LOAD_OPTIONAL, &load, &len);
2074 
2075 	if (fdt_noffset < 0)
2076 		goto out;
2077 
2078 	debug("fit_uname=%s, fit_uname_config=%s\n",
2079 			fit_uname ? fit_uname : "<NULL>",
2080 			fit_uname_config ? fit_uname_config : "<NULL>");
2081 
2082 	fit = map_sysmem(addr, 0);
2083 
2084 	cfg_noffset = fit_conf_get_node(fit, fit_uname_config);
2085 
2086 	/* single blob, or error just return as well */
2087 	count = fit_conf_get_prop_node_count(fit, cfg_noffset, FIT_FDT_PROP);
2088 	if (count <= 1 && !next_config)
2089 		goto out;
2090 
2091 	/* we need to apply overlays */
2092 
2093 #ifdef CONFIG_OF_LIBFDT_OVERLAY
2094 	image_start = addr;
2095 	image_end = addr + fit_get_size(fit);
2096 	/* verify that relocation took place by load address not being in fit */
2097 	if (load >= image_start && load < image_end) {
2098 		/* check is simplified; fit load checks for overlaps */
2099 		printf("Overlayed FDT requires relocation\n");
2100 		fdt_noffset = -EBADF;
2101 		goto out;
2102 	}
2103 
2104 	base = map_sysmem(load, len);
2105 
2106 	/* apply extra configs in FIT first, followed by args */
2107 	for (i = 1; ; i++) {
2108 		if (i < count) {
2109 			noffset = fit_conf_get_prop_node_index(fit, cfg_noffset,
2110 							       FIT_FDT_PROP, i);
2111 			uname = fit_get_name(fit, noffset, NULL);
2112 			uconfig = NULL;
2113 		} else {
2114 			if (!next_config)
2115 				break;
2116 			uconfig = next_config;
2117 			next_config = strchr(next_config, '#');
2118 			if (next_config)
2119 				*next_config++ = '\0';
2120 			uname = NULL;
2121 		}
2122 
2123 		debug("%d: using uname=%s uconfig=%s\n", i, uname, uconfig);
2124 
2125 		ov_noffset = fit_image_load(images,
2126 			addr, &uname, &uconfig,
2127 			arch, IH_TYPE_FLATDT,
2128 			BOOTSTAGE_ID_FIT_FDT_START,
2129 			FIT_LOAD_REQUIRED, &ovload, &ovlen);
2130 		if (ov_noffset < 0) {
2131 			printf("load of %s failed\n", uname);
2132 			continue;
2133 		}
2134 		debug("%s loaded at 0x%08lx len=0x%08lx\n",
2135 				uname, ovload, ovlen);
2136 		ov = map_sysmem(ovload, ovlen);
2137 
2138 		base = map_sysmem(load, len + ovlen);
2139 		err = fdt_open_into(base, base, len + ovlen);
2140 		if (err < 0) {
2141 			printf("failed on fdt_open_into\n");
2142 			fdt_noffset = err;
2143 			goto out;
2144 		}
2145 		/* the verbose method prints out messages on error */
2146 		err = fdt_overlay_apply_verbose(base, ov);
2147 		if (err < 0) {
2148 			fdt_noffset = err;
2149 			goto out;
2150 		}
2151 		fdt_pack(base);
2152 		len = fdt_totalsize(base);
2153 	}
2154 #else
2155 	printf("config with overlays but CONFIG_OF_LIBFDT_OVERLAY not set\n");
2156 	fdt_noffset = -EBADF;
2157 #endif
2158 
2159 out:
2160 	if (datap)
2161 		*datap = load;
2162 	if (lenp)
2163 		*lenp = len;
2164 	if (fit_unamep)
2165 		*fit_unamep = fit_uname;
2166 	if (fit_uname_configp)
2167 		*fit_uname_configp = fit_uname_config;
2168 
2169 	if (fit_uname_config_copy)
2170 		free(fit_uname_config_copy);
2171 	return fdt_noffset;
2172 }
2173 #endif
2174