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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>
15 #include <linux/libfdt.h>
19 #ifndef CONFIG_SYS_FDT_PAD
20 #define CONFIG_SYS_FDT_PAD 0x3000
23 /* adding a ramdisk needs 0x44 bytes in version 2008.10 */
24 #define FDT_RAMDISK_OVERHEAD 0x80
26 DECLARE_GLOBAL_DATA_PTR
;
28 static void fdt_error(const char *msg
)
32 puts(" - must RESET the board to recover.\n");
35 #if defined(CONFIG_IMAGE_FORMAT_LEGACY)
36 static const image_header_t
*image_get_fdt(ulong fdt_addr
)
38 const image_header_t
*fdt_hdr
= map_sysmem(fdt_addr
, 0);
40 image_print_contents(fdt_hdr
);
42 puts(" Verifying Checksum ... ");
43 if (!image_check_hcrc(fdt_hdr
)) {
44 fdt_error("fdt header checksum invalid");
48 if (!image_check_dcrc(fdt_hdr
)) {
49 fdt_error("fdt checksum invalid");
54 if (!image_check_type(fdt_hdr
, IH_TYPE_FLATDT
)) {
55 fdt_error("uImage is not a fdt");
58 if (image_get_comp(fdt_hdr
) != IH_COMP_NONE
) {
59 fdt_error("uImage is compressed");
62 if (fdt_check_header((void *)image_get_data(fdt_hdr
)) != 0) {
63 fdt_error("uImage data is not a fdt");
71 * boot_fdt_add_mem_rsv_regions - Mark the memreserve sections as unusable
72 * @lmb: pointer to lmb handle, will be used for memory mgmt
73 * @fdt_blob: pointer to fdt blob base address
75 * Adds the memreserve regions in the dtb to the lmb block. Adding the
76 * memreserve regions prevents u-boot from using them to store the initrd
79 void boot_fdt_add_mem_rsv_regions(struct lmb
*lmb
, void *fdt_blob
)
84 if (fdt_check_header(fdt_blob
) != 0)
87 total
= fdt_num_mem_rsv(fdt_blob
);
88 for (i
= 0; i
< total
; i
++) {
89 if (fdt_get_mem_rsv(fdt_blob
, i
, &addr
, &size
) != 0)
91 printf(" reserving fdt memory region: addr=%llx size=%llx\n",
92 (unsigned long long)addr
, (unsigned long long)size
);
93 lmb_reserve(lmb
, addr
, size
);
98 * boot_relocate_fdt - relocate flat device tree
99 * @lmb: pointer to lmb handle, will be used for memory mgmt
100 * @of_flat_tree: pointer to a char* variable, will hold fdt start address
101 * @of_size: pointer to a ulong variable, will hold fdt length
103 * boot_relocate_fdt() allocates a region of memory within the bootmap and
104 * relocates the of_flat_tree into that region, even if the fdt is already in
105 * the bootmap. It also expands the size of the fdt by CONFIG_SYS_FDT_PAD
108 * of_flat_tree and of_size are set to final (after relocation) values
114 int boot_relocate_fdt(struct lmb
*lmb
, char **of_flat_tree
, ulong
*of_size
)
116 void *fdt_blob
= *of_flat_tree
;
117 void *of_start
= NULL
;
121 int disable_relocation
= 0;
127 if (fdt_check_header(fdt_blob
) != 0) {
128 fdt_error("image is not a fdt");
132 /* position on a 4K boundary before the alloc_current */
133 /* Pad the FDT by a specified amount */
134 of_len
= *of_size
+ CONFIG_SYS_FDT_PAD
;
136 /* If fdt_high is set use it to select the relocation address */
137 fdt_high
= env_get("fdt_high");
139 void *desired_addr
= (void *)simple_strtoul(fdt_high
, NULL
, 16);
141 if (((ulong
) desired_addr
) == ~0UL) {
142 /* All ones means use fdt in place */
144 lmb_reserve(lmb
, (ulong
)of_start
, of_len
);
145 disable_relocation
= 1;
146 } else if (desired_addr
) {
148 (void *)(ulong
) lmb_alloc_base(lmb
, of_len
, 0x1000,
149 (ulong
)desired_addr
);
150 if (of_start
== NULL
) {
151 puts("Failed using fdt_high value for Device Tree");
156 (void *)(ulong
) lmb_alloc(lmb
, of_len
, 0x1000);
160 (void *)(ulong
) lmb_alloc_base(lmb
, of_len
, 0x1000,
161 env_get_bootm_mapsize()
162 + env_get_bootm_low());
165 if (of_start
== NULL
) {
166 puts("device tree - allocation error\n");
170 if (disable_relocation
) {
172 * We assume there is space after the existing fdt to use
175 fdt_set_totalsize(of_start
, of_len
);
176 printf(" Using Device Tree in place at %p, end %p\n",
177 of_start
, of_start
+ of_len
- 1);
179 debug("## device tree at %p ... %p (len=%ld [0x%lX])\n",
180 fdt_blob
, fdt_blob
+ *of_size
- 1, of_len
, of_len
);
182 printf(" Loading Device Tree to %p, end %p ... ",
183 of_start
, of_start
+ of_len
- 1);
185 err
= fdt_open_into(fdt_blob
, of_start
, of_len
);
187 fdt_error("fdt move failed");
193 *of_flat_tree
= of_start
;
196 set_working_fdt_addr(map_to_sysmem(*of_flat_tree
));
204 * boot_get_fdt - main fdt handling routine
205 * @argc: command argument count
206 * @argv: command argument list
207 * @arch: architecture (IH_ARCH_...)
208 * @images: pointer to the bootm images structure
209 * @of_flat_tree: pointer to a char* variable, will hold fdt start address
210 * @of_size: pointer to a ulong variable, will hold fdt length
212 * boot_get_fdt() is responsible for finding a valid flat device tree image.
213 * Curently supported are the following ramdisk sources:
214 * - multicomponent kernel/ramdisk image,
215 * - commandline provided address of decicated ramdisk image.
218 * 0, if fdt image was found and valid, or skipped
219 * of_flat_tree and of_size are set to fdt start address and length if
220 * fdt image is found and valid
222 * 1, if fdt image is found but corrupted
223 * of_flat_tree and of_size are set to 0 if no fdt exists
225 int boot_get_fdt(int flag
, int argc
, char * const argv
[], uint8_t arch
,
226 bootm_headers_t
*images
, char **of_flat_tree
, ulong
*of_size
)
228 #if defined(CONFIG_IMAGE_FORMAT_LEGACY)
229 const image_header_t
*fdt_hdr
;
230 ulong load
, load_end
;
231 ulong image_start
, image_data
, image_end
;
234 char *fdt_blob
= NULL
;
236 #if CONFIG_IS_ENABLED(FIT)
237 const char *fit_uname_config
= images
->fit_uname_cfg
;
238 const char *fit_uname_fdt
= NULL
;
242 const char *select
= NULL
;
245 *of_flat_tree
= NULL
;
250 if (select
|| genimg_has_config(images
)) {
251 #if CONFIG_IS_ENABLED(FIT)
254 * If the FDT blob comes from the FIT image and the
255 * FIT image address is omitted in the command line
256 * argument, try to use ramdisk or os FIT image
257 * address or default load address.
259 if (images
->fit_uname_rd
)
260 default_addr
= (ulong
)images
->fit_hdr_rd
;
261 else if (images
->fit_uname_os
)
262 default_addr
= (ulong
)images
->fit_hdr_os
;
264 default_addr
= load_addr
;
266 if (fit_parse_conf(select
, default_addr
,
267 &fdt_addr
, &fit_uname_config
)) {
268 debug("* fdt: config '%s' from image at 0x%08lx\n",
269 fit_uname_config
, fdt_addr
);
270 } else if (fit_parse_subimage(select
, default_addr
,
271 &fdt_addr
, &fit_uname_fdt
)) {
272 debug("* fdt: subimage '%s' from image at 0x%08lx\n",
273 fit_uname_fdt
, fdt_addr
);
277 fdt_addr
= simple_strtoul(select
, NULL
, 16);
278 debug("* fdt: cmdline image address = 0x%08lx\n",
281 #if CONFIG_IS_ENABLED(FIT)
283 /* use FIT configuration provided in first bootm
286 fdt_addr
= map_to_sysmem(images
->fit_hdr_os
);
287 fdt_noffset
= fit_get_node_from_config(images
,
290 if (fdt_noffset
== -ENOENT
)
292 else if (fdt_noffset
< 0)
296 debug("## Checking for 'FDT'/'FDT Image' at %08lx\n",
300 * Check if there is an FDT image at the
301 * address provided in the second bootm argument
302 * check image type, for FIT images get a FIT node.
304 buf
= map_sysmem(fdt_addr
, 0);
305 switch (genimg_get_format(buf
)) {
306 #if defined(CONFIG_IMAGE_FORMAT_LEGACY)
307 case IMAGE_FORMAT_LEGACY
:
308 /* verify fdt_addr points to a valid image header */
309 printf("## Flattened Device Tree from Legacy Image at %08lx\n",
311 fdt_hdr
= image_get_fdt(fdt_addr
);
316 * move image data to the load address,
317 * make sure we don't overwrite initial image
319 image_start
= (ulong
)fdt_hdr
;
320 image_data
= (ulong
)image_get_data(fdt_hdr
);
321 image_end
= image_get_image_end(fdt_hdr
);
323 load
= image_get_load(fdt_hdr
);
324 load_end
= load
+ image_get_data_size(fdt_hdr
);
326 if (load
== image_start
||
327 load
== image_data
) {
332 if ((load
< image_end
) && (load_end
> image_start
)) {
333 fdt_error("fdt overwritten");
337 debug(" Loading FDT from 0x%08lx to 0x%08lx\n",
340 memmove((void *)load
,
342 image_get_data_size(fdt_hdr
));
347 case IMAGE_FORMAT_FIT
:
349 * This case will catch both: new uImage format
350 * (libfdt based) and raw FDT blob (also libfdt
353 #if CONFIG_IS_ENABLED(FIT)
354 /* check FDT blob vs FIT blob */
355 if (fit_check_format(buf
)) {
358 fdt_noffset
= boot_get_fdt_fit(images
,
359 fdt_addr
, &fit_uname_fdt
,
363 images
->fit_hdr_fdt
= map_sysmem(fdt_addr
, 0);
364 images
->fit_uname_fdt
= fit_uname_fdt
;
365 images
->fit_noffset_fdt
= fdt_noffset
;
375 debug("* fdt: raw FDT blob\n");
376 printf("## Flattened Device Tree blob at %08lx\n",
381 puts("ERROR: Did not find a cmdline Flattened Device Tree\n");
385 printf(" Booting using the fdt blob at %#08lx\n", fdt_addr
);
386 fdt_blob
= map_sysmem(fdt_addr
, 0);
387 } else if (images
->legacy_hdr_valid
&&
388 image_check_type(&images
->legacy_hdr_os_copy
,
390 ulong fdt_data
, fdt_len
;
393 * Now check if we have a legacy multi-component image,
394 * get second entry data start address and len.
396 printf("## Flattened Device Tree from multi component Image at %08lX\n",
397 (ulong
)images
->legacy_hdr_os
);
399 image_multi_getimg(images
->legacy_hdr_os
, 2, &fdt_data
,
402 fdt_blob
= (char *)fdt_data
;
403 printf(" Booting using the fdt at 0x%p\n", fdt_blob
);
405 if (fdt_check_header(fdt_blob
) != 0) {
406 fdt_error("image is not a fdt");
410 if (fdt_totalsize(fdt_blob
) != fdt_len
) {
411 fdt_error("fdt size != image size");
415 debug("## No Flattened Device Tree\n");
419 debug("## No Flattened Device Tree\n");
423 *of_flat_tree
= fdt_blob
;
424 *of_size
= fdt_totalsize(fdt_blob
);
425 debug(" of_flat_tree at 0x%08lx size 0x%08lx\n",
426 (ulong
)*of_flat_tree
, *of_size
);
433 *of_flat_tree
= NULL
;
435 if (!select
&& ok_no_fdt
) {
436 debug("Continuing to boot without FDT\n");
443 * Verify the device tree.
445 * This function is called after all device tree fix-ups have been enacted,
446 * so that the final device tree can be verified. The definition of "verified"
447 * is up to the specific implementation. However, it generally means that the
448 * addresses of some of the devices in the device tree are compared with the
449 * actual addresses at which U-Boot has placed them.
451 * Returns 1 on success, 0 on failure. If 0 is returned, U-Boot will halt the
454 __weak
int ft_verify_fdt(void *fdt
)
459 __weak
int arch_fixup_fdt(void *blob
)
464 int image_setup_libfdt(bootm_headers_t
*images
, void *blob
,
465 int of_size
, struct lmb
*lmb
)
467 ulong
*initrd_start
= &images
->initrd_start
;
468 ulong
*initrd_end
= &images
->initrd_end
;
472 if (fdt_root(blob
) < 0) {
473 printf("ERROR: root node setup failed\n");
476 if (fdt_chosen(blob
) < 0) {
477 printf("ERROR: /chosen node create failed\n");
480 if (arch_fixup_fdt(blob
) < 0) {
481 printf("ERROR: arch-specific fdt fixup failed\n");
484 /* Update ethernet nodes */
485 fdt_fixup_ethernet(blob
);
486 if (IMAGE_OF_BOARD_SETUP
) {
487 fdt_ret
= ft_board_setup(blob
, gd
->bd
);
489 printf("ERROR: board-specific fdt fixup failed: %s\n",
490 fdt_strerror(fdt_ret
));
494 if (IMAGE_OF_SYSTEM_SETUP
) {
495 fdt_ret
= ft_system_setup(blob
, gd
->bd
);
497 printf("ERROR: system-specific fdt fixup failed: %s\n",
498 fdt_strerror(fdt_ret
));
503 /* Delete the old LMB reservation */
505 lmb_free(lmb
, (phys_addr_t
)(u32
)(uintptr_t)blob
,
506 (phys_size_t
)fdt_totalsize(blob
));
508 ret
= fdt_shrink_to_minimum(blob
, 0);
513 if (*initrd_start
&& *initrd_end
) {
514 of_size
+= FDT_RAMDISK_OVERHEAD
;
515 fdt_set_totalsize(blob
, of_size
);
517 /* Create a new LMB reservation */
519 lmb_reserve(lmb
, (ulong
)blob
, of_size
);
521 fdt_initrd(blob
, *initrd_start
, *initrd_end
);
522 if (!ft_verify_fdt(blob
))
525 #if defined(CONFIG_SOC_KEYSTONE)
526 if (IMAGE_OF_BOARD_SETUP
)
527 ft_board_setup_ex(blob
, gd
->bd
);
532 printf(" - must RESET the board to recover.\n\n");