2 * Copyright (c) 2013, Google Inc.
4 * (C) Copyright 2008 Semihalf
6 * (C) Copyright 2000-2006
7 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
9 * SPDX-License-Identifier: GPL-2.0+
13 #include <fdt_support.h>
19 #ifndef CONFIG_SYS_FDT_PAD
20 #define CONFIG_SYS_FDT_PAD 0x3000
23 DECLARE_GLOBAL_DATA_PTR
;
25 static void fdt_error(const char *msg
)
29 puts(" - must RESET the board to recover.\n");
32 static const image_header_t
*image_get_fdt(ulong fdt_addr
)
34 const image_header_t
*fdt_hdr
= map_sysmem(fdt_addr
, 0);
36 image_print_contents(fdt_hdr
);
38 puts(" Verifying Checksum ... ");
39 if (!image_check_hcrc(fdt_hdr
)) {
40 fdt_error("fdt header checksum invalid");
44 if (!image_check_dcrc(fdt_hdr
)) {
45 fdt_error("fdt checksum invalid");
50 if (!image_check_type(fdt_hdr
, IH_TYPE_FLATDT
)) {
51 fdt_error("uImage is not a fdt");
54 if (image_get_comp(fdt_hdr
) != IH_COMP_NONE
) {
55 fdt_error("uImage is compressed");
58 if (fdt_check_header((void *)image_get_data(fdt_hdr
)) != 0) {
59 fdt_error("uImage data is not a fdt");
66 * boot_fdt_add_mem_rsv_regions - Mark the memreserve sections as unusable
67 * @lmb: pointer to lmb handle, will be used for memory mgmt
68 * @fdt_blob: pointer to fdt blob base address
70 * Adds the memreserve regions in the dtb to the lmb block. Adding the
71 * memreserve regions prevents u-boot from using them to store the initrd
74 void boot_fdt_add_mem_rsv_regions(struct lmb
*lmb
, void *fdt_blob
)
79 if (fdt_check_header(fdt_blob
) != 0)
82 total
= fdt_num_mem_rsv(fdt_blob
);
83 for (i
= 0; i
< total
; i
++) {
84 if (fdt_get_mem_rsv(fdt_blob
, i
, &addr
, &size
) != 0)
86 printf(" reserving fdt memory region: addr=%llx size=%llx\n",
87 (unsigned long long)addr
, (unsigned long long)size
);
88 lmb_reserve(lmb
, addr
, size
);
93 * boot_relocate_fdt - relocate flat device tree
94 * @lmb: pointer to lmb handle, will be used for memory mgmt
95 * @of_flat_tree: pointer to a char* variable, will hold fdt start address
96 * @of_size: pointer to a ulong variable, will hold fdt length
98 * boot_relocate_fdt() allocates a region of memory within the bootmap and
99 * relocates the of_flat_tree into that region, even if the fdt is already in
100 * the bootmap. It also expands the size of the fdt by CONFIG_SYS_FDT_PAD
103 * of_flat_tree and of_size are set to final (after relocation) values
109 int boot_relocate_fdt(struct lmb
*lmb
, char **of_flat_tree
, ulong
*of_size
)
111 void *fdt_blob
= *of_flat_tree
;
112 void *of_start
= NULL
;
116 int disable_relocation
= 0;
122 if (fdt_check_header(fdt_blob
) != 0) {
123 fdt_error("image is not a fdt");
127 /* position on a 4K boundary before the alloc_current */
128 /* Pad the FDT by a specified amount */
129 of_len
= *of_size
+ CONFIG_SYS_FDT_PAD
;
131 /* If fdt_high is set use it to select the relocation address */
132 fdt_high
= getenv("fdt_high");
134 void *desired_addr
= (void *)simple_strtoul(fdt_high
, NULL
, 16);
136 if (((ulong
) desired_addr
) == ~0UL) {
137 /* All ones means use fdt in place */
139 lmb_reserve(lmb
, (ulong
)of_start
, of_len
);
140 disable_relocation
= 1;
141 } else if (desired_addr
) {
143 (void *)(ulong
) lmb_alloc_base(lmb
, of_len
, 0x1000,
144 (ulong
)desired_addr
);
145 if (of_start
== NULL
) {
146 puts("Failed using fdt_high value for Device Tree");
151 (void *)(ulong
) lmb_alloc(lmb
, of_len
, 0x1000);
155 (void *)(ulong
) lmb_alloc_base(lmb
, of_len
, 0x1000,
156 getenv_bootm_mapsize()
157 + getenv_bootm_low());
160 if (of_start
== NULL
) {
161 puts("device tree - allocation error\n");
165 if (disable_relocation
) {
167 * We assume there is space after the existing fdt to use
170 fdt_set_totalsize(of_start
, of_len
);
171 printf(" Using Device Tree in place at %p, end %p\n",
172 of_start
, of_start
+ of_len
- 1);
174 debug("## device tree at %p ... %p (len=%ld [0x%lX])\n",
175 fdt_blob
, fdt_blob
+ *of_size
- 1, of_len
, of_len
);
177 printf(" Loading Device Tree to %p, end %p ... ",
178 of_start
, of_start
+ of_len
- 1);
180 err
= fdt_open_into(fdt_blob
, of_start
, of_len
);
182 fdt_error("fdt move failed");
188 *of_flat_tree
= of_start
;
191 set_working_fdt_addr(*of_flat_tree
);
199 * boot_get_fdt - main fdt handling routine
200 * @argc: command argument count
201 * @argv: command argument list
202 * @arch: architecture (IH_ARCH_...)
203 * @images: pointer to the bootm images structure
204 * @of_flat_tree: pointer to a char* variable, will hold fdt start address
205 * @of_size: pointer to a ulong variable, will hold fdt length
207 * boot_get_fdt() is responsible for finding a valid flat device tree image.
208 * Curently supported are the following ramdisk sources:
209 * - multicomponent kernel/ramdisk image,
210 * - commandline provided address of decicated ramdisk image.
213 * 0, if fdt image was found and valid, or skipped
214 * of_flat_tree and of_size are set to fdt start address and length if
215 * fdt image is found and valid
217 * 1, if fdt image is found but corrupted
218 * of_flat_tree and of_size are set to 0 if no fdt exists
220 int boot_get_fdt(int flag
, int argc
, char * const argv
[], uint8_t arch
,
221 bootm_headers_t
*images
, char **of_flat_tree
, ulong
*of_size
)
223 const image_header_t
*fdt_hdr
;
225 char *fdt_blob
= NULL
;
226 ulong image_start
, image_data
, image_end
;
227 ulong load
, load_end
;
229 #if defined(CONFIG_FIT)
230 const char *fit_uname_config
= images
->fit_uname_cfg
;
231 const char *fit_uname_fdt
= NULL
;
235 const char *select
= NULL
;
237 *of_flat_tree
= NULL
;
242 if (select
|| genimg_has_config(images
)) {
243 #if defined(CONFIG_FIT)
246 * If the FDT blob comes from the FIT image and the
247 * FIT image address is omitted in the command line
248 * argument, try to use ramdisk or os FIT image
249 * address or default load address.
251 if (images
->fit_uname_rd
)
252 default_addr
= (ulong
)images
->fit_hdr_rd
;
253 else if (images
->fit_uname_os
)
254 default_addr
= (ulong
)images
->fit_hdr_os
;
256 default_addr
= load_addr
;
258 if (fit_parse_conf(select
, default_addr
,
259 &fdt_addr
, &fit_uname_config
)) {
260 debug("* fdt: config '%s' from image at 0x%08lx\n",
261 fit_uname_config
, fdt_addr
);
262 } else if (fit_parse_subimage(select
, default_addr
,
263 &fdt_addr
, &fit_uname_fdt
)) {
264 debug("* fdt: subimage '%s' from image at 0x%08lx\n",
265 fit_uname_fdt
, fdt_addr
);
269 fdt_addr
= simple_strtoul(select
, NULL
, 16);
270 debug("* fdt: cmdline image address = 0x%08lx\n",
273 #if defined(CONFIG_FIT)
275 /* use FIT configuration provided in first bootm
278 fdt_addr
= map_to_sysmem(images
->fit_hdr_os
);
279 fdt_noffset
= fit_get_node_from_config(images
,
282 if (fdt_noffset
== -ENOLINK
)
284 else if (fdt_noffset
< 0)
288 debug("## Checking for 'FDT'/'FDT Image' at %08lx\n",
291 /* copy from dataflash if needed */
292 fdt_addr
= genimg_get_image(fdt_addr
);
295 * Check if there is an FDT image at the
296 * address provided in the second bootm argument
297 * check image type, for FIT images get a FIT node.
299 buf
= map_sysmem(fdt_addr
, 0);
300 switch (genimg_get_format(buf
)) {
301 case IMAGE_FORMAT_LEGACY
:
302 /* verify fdt_addr points to a valid image header */
303 printf("## Flattened Device Tree from Legacy Image at %08lx\n",
305 fdt_hdr
= image_get_fdt(fdt_addr
);
310 * move image data to the load address,
311 * make sure we don't overwrite initial image
313 image_start
= (ulong
)fdt_hdr
;
314 image_data
= (ulong
)image_get_data(fdt_hdr
);
315 image_end
= image_get_image_end(fdt_hdr
);
317 load
= image_get_load(fdt_hdr
);
318 load_end
= load
+ image_get_data_size(fdt_hdr
);
320 if (load
== image_start
||
321 load
== image_data
) {
322 fdt_blob
= (char *)image_data
;
326 if ((load
< image_end
) && (load_end
> image_start
)) {
327 fdt_error("fdt overwritten");
331 debug(" Loading FDT from 0x%08lx to 0x%08lx\n",
334 memmove((void *)load
,
336 image_get_data_size(fdt_hdr
));
340 case IMAGE_FORMAT_FIT
:
342 * This case will catch both: new uImage format
343 * (libfdt based) and raw FDT blob (also libfdt
346 #if defined(CONFIG_FIT)
347 /* check FDT blob vs FIT blob */
348 if (fit_check_format(buf
)) {
351 fdt_noffset
= fit_image_load(images
,
353 fdt_addr
, &fit_uname_fdt
,
355 arch
, IH_TYPE_FLATDT
,
356 BOOTSTAGE_ID_FIT_FDT_START
,
357 FIT_LOAD_OPTIONAL
, &load
, &len
);
359 images
->fit_hdr_fdt
= map_sysmem(fdt_addr
, 0);
360 images
->fit_uname_fdt
= fit_uname_fdt
;
361 images
->fit_noffset_fdt
= fdt_noffset
;
370 debug("* fdt: raw FDT blob\n");
371 printf("## Flattened Device Tree blob at %08lx\n",
376 puts("ERROR: Did not find a cmdline Flattened Device Tree\n");
380 printf(" Booting using the fdt blob at %#08lx\n", fdt_addr
);
381 fdt_blob
= map_sysmem(fdt_addr
, 0);
382 } else if (images
->legacy_hdr_valid
&&
383 image_check_type(&images
->legacy_hdr_os_copy
,
385 ulong fdt_data
, fdt_len
;
388 * Now check if we have a legacy multi-component image,
389 * get second entry data start address and len.
391 printf("## Flattened Device Tree from multi component Image at %08lX\n",
392 (ulong
)images
->legacy_hdr_os
);
394 image_multi_getimg(images
->legacy_hdr_os
, 2, &fdt_data
,
397 fdt_blob
= (char *)fdt_data
;
398 printf(" Booting using the fdt at 0x%p\n", fdt_blob
);
400 if (fdt_check_header(fdt_blob
) != 0) {
401 fdt_error("image is not a fdt");
405 if (fdt_totalsize(fdt_blob
) != fdt_len
) {
406 fdt_error("fdt size != image size");
410 debug("## No Flattened Device Tree\n");
414 debug("## No Flattened Device Tree\n");
418 *of_flat_tree
= fdt_blob
;
419 *of_size
= fdt_totalsize(fdt_blob
);
420 debug(" of_flat_tree at 0x%08lx size 0x%08lx\n",
421 (ulong
)*of_flat_tree
, *of_size
);
426 *of_flat_tree
= NULL
;
432 * Verify the device tree.
434 * This function is called after all device tree fix-ups have been enacted,
435 * so that the final device tree can be verified. The definition of "verified"
436 * is up to the specific implementation. However, it generally means that the
437 * addresses of some of the devices in the device tree are compared with the
438 * actual addresses at which U-Boot has placed them.
440 * Returns 1 on success, 0 on failure. If 0 is returned, U-boot will halt the
443 __weak
int ft_verify_fdt(void *fdt
)
448 __weak
int arch_fixup_memory_node(void *blob
)
453 int image_setup_libfdt(bootm_headers_t
*images
, void *blob
,
454 int of_size
, struct lmb
*lmb
)
456 ulong
*initrd_start
= &images
->initrd_start
;
457 ulong
*initrd_end
= &images
->initrd_end
;
460 if (fdt_chosen(blob
, 1) < 0) {
461 puts("ERROR: /chosen node create failed");
462 puts(" - must RESET the board to recover.\n");
465 arch_fixup_memory_node(blob
);
466 if (IMAAGE_OF_BOARD_SETUP
)
467 ft_board_setup(blob
, gd
->bd
);
468 fdt_fixup_ethernet(blob
);
470 /* Delete the old LMB reservation */
471 lmb_free(lmb
, (phys_addr_t
)(u32
)(uintptr_t)blob
,
472 (phys_size_t
)fdt_totalsize(blob
));
474 ret
= fdt_resize(blob
);
479 if (*initrd_start
&& *initrd_end
) {
480 of_size
+= FDT_RAMDISK_OVERHEAD
;
481 fdt_set_totalsize(blob
, of_size
);
483 /* Create a new LMB reservation */
484 lmb_reserve(lmb
, (ulong
)blob
, of_size
);
486 fdt_initrd(blob
, *initrd_start
, *initrd_end
, 1);
487 if (!ft_verify_fdt(blob
))