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git.ipfire.org Git - thirdparty/u-boot.git/blob - common/image-fdt.c
1 // SPDX-License-Identifier: GPL-2.0+
3 * Copyright (c) 2013, Google Inc.
5 * (C) Copyright 2008 Semihalf
7 * (C) Copyright 2000-2006
8 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
12 #include <fdt_support.h>
16 #include <linux/libfdt.h>
20 #ifndef CONFIG_SYS_FDT_PAD
21 #define CONFIG_SYS_FDT_PAD 0x3000
24 /* adding a ramdisk needs 0x44 bytes in version 2008.10 */
25 #define FDT_RAMDISK_OVERHEAD 0x80
27 DECLARE_GLOBAL_DATA_PTR
;
29 static void fdt_error(const char *msg
)
33 puts(" - must RESET the board to recover.\n");
36 #if defined(CONFIG_IMAGE_FORMAT_LEGACY)
37 static const image_header_t
*image_get_fdt(ulong fdt_addr
)
39 const image_header_t
*fdt_hdr
= map_sysmem(fdt_addr
, 0);
41 image_print_contents(fdt_hdr
);
43 puts(" Verifying Checksum ... ");
44 if (!image_check_hcrc(fdt_hdr
)) {
45 fdt_error("fdt header checksum invalid");
49 if (!image_check_dcrc(fdt_hdr
)) {
50 fdt_error("fdt checksum invalid");
55 if (!image_check_type(fdt_hdr
, IH_TYPE_FLATDT
)) {
56 fdt_error("uImage is not a fdt");
59 if (image_get_comp(fdt_hdr
) != IH_COMP_NONE
) {
60 fdt_error("uImage is compressed");
63 if (fdt_check_header((void *)image_get_data(fdt_hdr
)) != 0) {
64 fdt_error("uImage data is not a fdt");
71 static void boot_fdt_reserve_region(struct lmb
*lmb
, uint64_t addr
,
76 ret
= lmb_reserve(lmb
, addr
, size
);
78 debug(" reserving fdt memory region: addr=%llx size=%llx\n",
79 (unsigned long long)addr
, (unsigned long long)size
);
81 puts("ERROR: reserving fdt memory region failed ");
82 printf("(addr=%llx size=%llx)\n",
83 (unsigned long long)addr
, (unsigned long long)size
);
88 * boot_fdt_add_mem_rsv_regions - Mark the memreserve and reserved-memory
89 * sections as unusable
90 * @lmb: pointer to lmb handle, will be used for memory mgmt
91 * @fdt_blob: pointer to fdt blob base address
93 * Adds the and reserved-memorymemreserve regions in the dtb to the lmb block.
94 * Adding the memreserve regions prevents u-boot from using them to store the
95 * initrd or the fdt blob.
97 void boot_fdt_add_mem_rsv_regions(struct lmb
*lmb
, void *fdt_blob
)
101 int nodeoffset
, subnode
;
102 struct fdt_resource res
;
104 if (fdt_check_header(fdt_blob
) != 0)
107 /* process memreserve sections */
108 total
= fdt_num_mem_rsv(fdt_blob
);
109 for (i
= 0; i
< total
; i
++) {
110 if (fdt_get_mem_rsv(fdt_blob
, i
, &addr
, &size
) != 0)
112 boot_fdt_reserve_region(lmb
, addr
, size
);
115 /* process reserved-memory */
116 nodeoffset
= fdt_subnode_offset(fdt_blob
, 0, "reserved-memory");
117 if (nodeoffset
>= 0) {
118 subnode
= fdt_first_subnode(fdt_blob
, nodeoffset
);
119 while (subnode
>= 0) {
120 /* check if this subnode has a reg property */
121 ret
= fdt_get_resource(fdt_blob
, subnode
, "reg", 0,
125 size
= res
.end
- res
.start
+ 1;
126 boot_fdt_reserve_region(lmb
, addr
, size
);
129 subnode
= fdt_next_subnode(fdt_blob
, subnode
);
135 * boot_relocate_fdt - relocate flat device tree
136 * @lmb: pointer to lmb handle, will be used for memory mgmt
137 * @of_flat_tree: pointer to a char* variable, will hold fdt start address
138 * @of_size: pointer to a ulong variable, will hold fdt length
140 * boot_relocate_fdt() allocates a region of memory within the bootmap and
141 * relocates the of_flat_tree into that region, even if the fdt is already in
142 * the bootmap. It also expands the size of the fdt by CONFIG_SYS_FDT_PAD
145 * of_flat_tree and of_size are set to final (after relocation) values
151 int boot_relocate_fdt(struct lmb
*lmb
, char **of_flat_tree
, ulong
*of_size
)
153 void *fdt_blob
= *of_flat_tree
;
154 void *of_start
= NULL
;
158 int disable_relocation
= 0;
164 if (fdt_check_header(fdt_blob
) != 0) {
165 fdt_error("image is not a fdt");
169 /* position on a 4K boundary before the alloc_current */
170 /* Pad the FDT by a specified amount */
171 of_len
= *of_size
+ CONFIG_SYS_FDT_PAD
;
173 /* If fdt_high is set use it to select the relocation address */
174 fdt_high
= env_get("fdt_high");
176 void *desired_addr
= (void *)simple_strtoul(fdt_high
, NULL
, 16);
178 if (((ulong
) desired_addr
) == ~0UL) {
179 /* All ones means use fdt in place */
181 lmb_reserve(lmb
, (ulong
)of_start
, of_len
);
182 disable_relocation
= 1;
183 } else if (desired_addr
) {
185 (void *)(ulong
) lmb_alloc_base(lmb
, of_len
, 0x1000,
186 (ulong
)desired_addr
);
187 if (of_start
== NULL
) {
188 puts("Failed using fdt_high value for Device Tree");
193 (void *)(ulong
) lmb_alloc(lmb
, of_len
, 0x1000);
197 (void *)(ulong
) lmb_alloc_base(lmb
, of_len
, 0x1000,
198 env_get_bootm_mapsize()
199 + env_get_bootm_low());
202 if (of_start
== NULL
) {
203 puts("device tree - allocation error\n");
207 if (disable_relocation
) {
209 * We assume there is space after the existing fdt to use
212 fdt_set_totalsize(of_start
, of_len
);
213 printf(" Using Device Tree in place at %p, end %p\n",
214 of_start
, of_start
+ of_len
- 1);
216 debug("## device tree at %p ... %p (len=%ld [0x%lX])\n",
217 fdt_blob
, fdt_blob
+ *of_size
- 1, of_len
, of_len
);
219 printf(" Loading Device Tree to %p, end %p ... ",
220 of_start
, of_start
+ of_len
- 1);
222 err
= fdt_open_into(fdt_blob
, of_start
, of_len
);
224 fdt_error("fdt move failed");
230 *of_flat_tree
= of_start
;
233 if (CONFIG_IS_ENABLED(CMD_FDT
))
234 set_working_fdt_addr(map_to_sysmem(*of_flat_tree
));
242 * boot_get_fdt - main fdt handling routine
243 * @argc: command argument count
244 * @argv: command argument list
245 * @arch: architecture (IH_ARCH_...)
246 * @images: pointer to the bootm images structure
247 * @of_flat_tree: pointer to a char* variable, will hold fdt start address
248 * @of_size: pointer to a ulong variable, will hold fdt length
250 * boot_get_fdt() is responsible for finding a valid flat device tree image.
251 * Curently supported are the following ramdisk sources:
252 * - multicomponent kernel/ramdisk image,
253 * - commandline provided address of decicated ramdisk image.
256 * 0, if fdt image was found and valid, or skipped
257 * of_flat_tree and of_size are set to fdt start address and length if
258 * fdt image is found and valid
260 * 1, if fdt image is found but corrupted
261 * of_flat_tree and of_size are set to 0 if no fdt exists
263 int boot_get_fdt(int flag
, int argc
, char * const argv
[], uint8_t arch
,
264 bootm_headers_t
*images
, char **of_flat_tree
, ulong
*of_size
)
266 #if defined(CONFIG_IMAGE_FORMAT_LEGACY)
267 const image_header_t
*fdt_hdr
;
268 ulong load
, load_end
;
269 ulong image_start
, image_data
, image_end
;
273 char *fdt_blob
= NULL
;
275 #if CONFIG_IS_ENABLED(FIT)
276 const char *fit_uname_config
= images
->fit_uname_cfg
;
277 const char *fit_uname_fdt
= NULL
;
281 const char *select
= NULL
;
283 *of_flat_tree
= NULL
;
286 img_addr
= (argc
== 0) ? load_addr
: simple_strtoul(argv
[0], NULL
, 16);
287 buf
= map_sysmem(img_addr
, 0);
291 if (select
|| genimg_has_config(images
)) {
292 #if CONFIG_IS_ENABLED(FIT)
295 * If the FDT blob comes from the FIT image and the
296 * FIT image address is omitted in the command line
297 * argument, try to use ramdisk or os FIT image
298 * address or default load address.
300 if (images
->fit_uname_rd
)
301 default_addr
= (ulong
)images
->fit_hdr_rd
;
302 else if (images
->fit_uname_os
)
303 default_addr
= (ulong
)images
->fit_hdr_os
;
305 default_addr
= load_addr
;
307 if (fit_parse_conf(select
, default_addr
,
308 &fdt_addr
, &fit_uname_config
)) {
309 debug("* fdt: config '%s' from image at 0x%08lx\n",
310 fit_uname_config
, fdt_addr
);
311 } else if (fit_parse_subimage(select
, default_addr
,
312 &fdt_addr
, &fit_uname_fdt
)) {
313 debug("* fdt: subimage '%s' from image at 0x%08lx\n",
314 fit_uname_fdt
, fdt_addr
);
318 fdt_addr
= simple_strtoul(select
, NULL
, 16);
319 debug("* fdt: cmdline image address = 0x%08lx\n",
322 #if CONFIG_IS_ENABLED(FIT)
324 /* use FIT configuration provided in first bootm
327 fdt_addr
= map_to_sysmem(images
->fit_hdr_os
);
328 fdt_noffset
= fit_get_node_from_config(images
,
331 if (fdt_noffset
== -ENOENT
)
333 else if (fdt_noffset
< 0)
337 debug("## Checking for 'FDT'/'FDT Image' at %08lx\n",
341 * Check if there is an FDT image at the
342 * address provided in the second bootm argument
343 * check image type, for FIT images get a FIT node.
345 buf
= map_sysmem(fdt_addr
, 0);
346 switch (genimg_get_format(buf
)) {
347 #if defined(CONFIG_IMAGE_FORMAT_LEGACY)
348 case IMAGE_FORMAT_LEGACY
:
349 /* verify fdt_addr points to a valid image header */
350 printf("## Flattened Device Tree from Legacy Image at %08lx\n",
352 fdt_hdr
= image_get_fdt(fdt_addr
);
357 * move image data to the load address,
358 * make sure we don't overwrite initial image
360 image_start
= (ulong
)fdt_hdr
;
361 image_data
= (ulong
)image_get_data(fdt_hdr
);
362 image_end
= image_get_image_end(fdt_hdr
);
364 load
= image_get_load(fdt_hdr
);
365 load_end
= load
+ image_get_data_size(fdt_hdr
);
367 if (load
== image_start
||
368 load
== image_data
) {
373 if ((load
< image_end
) && (load_end
> image_start
)) {
374 fdt_error("fdt overwritten");
378 debug(" Loading FDT from 0x%08lx to 0x%08lx\n",
381 memmove((void *)load
,
383 image_get_data_size(fdt_hdr
));
388 case IMAGE_FORMAT_FIT
:
390 * This case will catch both: new uImage format
391 * (libfdt based) and raw FDT blob (also libfdt
394 #if CONFIG_IS_ENABLED(FIT)
395 /* check FDT blob vs FIT blob */
396 if (fit_check_format(buf
)) {
399 fdt_noffset
= boot_get_fdt_fit(images
,
400 fdt_addr
, &fit_uname_fdt
,
404 images
->fit_hdr_fdt
= map_sysmem(fdt_addr
, 0);
405 images
->fit_uname_fdt
= fit_uname_fdt
;
406 images
->fit_noffset_fdt
= fdt_noffset
;
416 debug("* fdt: raw FDT blob\n");
417 printf("## Flattened Device Tree blob at %08lx\n",
422 puts("ERROR: Did not find a cmdline Flattened Device Tree\n");
426 printf(" Booting using the fdt blob at %#08lx\n", fdt_addr
);
427 fdt_blob
= map_sysmem(fdt_addr
, 0);
428 } else if (images
->legacy_hdr_valid
&&
429 image_check_type(&images
->legacy_hdr_os_copy
,
431 ulong fdt_data
, fdt_len
;
434 * Now check if we have a legacy multi-component image,
435 * get second entry data start address and len.
437 printf("## Flattened Device Tree from multi component Image at %08lX\n",
438 (ulong
)images
->legacy_hdr_os
);
440 image_multi_getimg(images
->legacy_hdr_os
, 2, &fdt_data
,
443 fdt_blob
= (char *)fdt_data
;
444 printf(" Booting using the fdt at 0x%p\n", fdt_blob
);
446 if (fdt_check_header(fdt_blob
) != 0) {
447 fdt_error("image is not a fdt");
451 if (fdt_totalsize(fdt_blob
) != fdt_len
) {
452 fdt_error("fdt size != image size");
456 debug("## No Flattened Device Tree\n");
459 #ifdef CONFIG_ANDROID_BOOT_IMAGE
460 } else if (genimg_get_format(buf
) == IMAGE_FORMAT_ANDROID
) {
461 struct andr_img_hdr
*hdr
= buf
;
462 ulong fdt_data
, fdt_len
;
464 if (!android_image_get_second(hdr
, &fdt_data
, &fdt_len
) &&
465 !fdt_check_header((char *)fdt_data
)) {
466 fdt_blob
= (char *)fdt_data
;
467 if (fdt_totalsize(fdt_blob
) != fdt_len
)
470 debug("## Using FDT in Android image second area\n");
472 fdt_addr
= env_get_hex("fdtaddr", 0);
476 fdt_blob
= map_sysmem(fdt_addr
, 0);
477 if (fdt_check_header(fdt_blob
))
480 debug("## Using FDT at ${fdtaddr}=Ox%lx\n", fdt_addr
);
484 debug("## No Flattened Device Tree\n");
488 *of_flat_tree
= fdt_blob
;
489 *of_size
= fdt_totalsize(fdt_blob
);
490 debug(" of_flat_tree at 0x%08lx size 0x%08lx\n",
491 (ulong
)*of_flat_tree
, *of_size
);
496 debug("Continuing to boot without FDT\n");
503 * Verify the device tree.
505 * This function is called after all device tree fix-ups have been enacted,
506 * so that the final device tree can be verified. The definition of "verified"
507 * is up to the specific implementation. However, it generally means that the
508 * addresses of some of the devices in the device tree are compared with the
509 * actual addresses at which U-Boot has placed them.
511 * Returns 1 on success, 0 on failure. If 0 is returned, U-Boot will halt the
514 __weak
int ft_verify_fdt(void *fdt
)
519 __weak
int arch_fixup_fdt(void *blob
)
524 int image_setup_libfdt(bootm_headers_t
*images
, void *blob
,
525 int of_size
, struct lmb
*lmb
)
527 ulong
*initrd_start
= &images
->initrd_start
;
528 ulong
*initrd_end
= &images
->initrd_end
;
532 if (fdt_root(blob
) < 0) {
533 printf("ERROR: root node setup failed\n");
536 if (fdt_chosen(blob
) < 0) {
537 printf("ERROR: /chosen node create failed\n");
540 if (arch_fixup_fdt(blob
) < 0) {
541 printf("ERROR: arch-specific fdt fixup failed\n");
544 /* Update ethernet nodes */
545 fdt_fixup_ethernet(blob
);
546 if (IMAGE_OF_BOARD_SETUP
) {
547 fdt_ret
= ft_board_setup(blob
, gd
->bd
);
549 printf("ERROR: board-specific fdt fixup failed: %s\n",
550 fdt_strerror(fdt_ret
));
554 if (IMAGE_OF_SYSTEM_SETUP
) {
555 fdt_ret
= ft_system_setup(blob
, gd
->bd
);
557 printf("ERROR: system-specific fdt fixup failed: %s\n",
558 fdt_strerror(fdt_ret
));
563 /* Delete the old LMB reservation */
565 lmb_free(lmb
, (phys_addr_t
)(u32
)(uintptr_t)blob
,
566 (phys_size_t
)fdt_totalsize(blob
));
568 ret
= fdt_shrink_to_minimum(blob
, 0);
573 if (*initrd_start
&& *initrd_end
) {
574 of_size
+= FDT_RAMDISK_OVERHEAD
;
575 fdt_set_totalsize(blob
, of_size
);
577 /* Create a new LMB reservation */
579 lmb_reserve(lmb
, (ulong
)blob
, of_size
);
581 fdt_initrd(blob
, *initrd_start
, *initrd_end
);
582 if (!ft_verify_fdt(blob
))
585 #if defined(CONFIG_SOC_KEYSTONE)
586 if (IMAGE_OF_BOARD_SETUP
)
587 ft_board_setup_ex(blob
, gd
->bd
);
592 printf(" - must RESET the board to recover.\n\n");