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>
20 #ifndef CONFIG_SYS_FDT_PAD
21 #define CONFIG_SYS_FDT_PAD 0x3000
24 DECLARE_GLOBAL_DATA_PTR;
26 static void fdt_error(const char *msg)
30 puts(" - must RESET the board to recover.\n");
33 #if defined(CONFIG_IMAGE_FORMAT_LEGACY)
34 static const image_header_t *image_get_fdt(ulong fdt_addr)
36 const image_header_t *fdt_hdr = map_sysmem(fdt_addr, 0);
38 image_print_contents(fdt_hdr);
40 puts(" Verifying Checksum ... ");
41 if (!image_check_hcrc(fdt_hdr)) {
42 fdt_error("fdt header checksum invalid");
46 if (!image_check_dcrc(fdt_hdr)) {
47 fdt_error("fdt checksum invalid");
52 if (!image_check_type(fdt_hdr, IH_TYPE_FLATDT)) {
53 fdt_error("uImage is not a fdt");
56 if (image_get_comp(fdt_hdr) != IH_COMP_NONE) {
57 fdt_error("uImage is compressed");
60 if (fdt_check_header((void *)image_get_data(fdt_hdr)) != 0) {
61 fdt_error("uImage data is not a fdt");
69 * boot_fdt_add_mem_rsv_regions - Mark the memreserve sections as unusable
70 * @lmb: pointer to lmb handle, will be used for memory mgmt
71 * @fdt_blob: pointer to fdt blob base address
73 * Adds the memreserve regions in the dtb to the lmb block. Adding the
74 * memreserve regions prevents u-boot from using them to store the initrd
77 void boot_fdt_add_mem_rsv_regions(struct lmb *lmb, void *fdt_blob)
82 if (fdt_check_header(fdt_blob) != 0)
85 total = fdt_num_mem_rsv(fdt_blob);
86 for (i = 0; i < total; i++) {
87 if (fdt_get_mem_rsv(fdt_blob, i, &addr, &size) != 0)
89 printf(" reserving fdt memory region: addr=%llx size=%llx\n",
90 (unsigned long long)addr, (unsigned long long)size);
91 lmb_reserve(lmb, addr, size);
96 * boot_relocate_fdt - relocate flat device tree
97 * @lmb: pointer to lmb handle, will be used for memory mgmt
98 * @of_flat_tree: pointer to a char* variable, will hold fdt start address
99 * @of_size: pointer to a ulong variable, will hold fdt length
101 * boot_relocate_fdt() allocates a region of memory within the bootmap and
102 * relocates the of_flat_tree into that region, even if the fdt is already in
103 * the bootmap. It also expands the size of the fdt by CONFIG_SYS_FDT_PAD
106 * of_flat_tree and of_size are set to final (after relocation) values
112 int boot_relocate_fdt(struct lmb *lmb, char **of_flat_tree, ulong *of_size)
114 void *fdt_blob = *of_flat_tree;
115 void *of_start = NULL;
119 int disable_relocation = 0;
125 if (fdt_check_header(fdt_blob) != 0) {
126 fdt_error("image is not a fdt");
130 /* position on a 4K boundary before the alloc_current */
131 /* Pad the FDT by a specified amount */
132 of_len = *of_size + CONFIG_SYS_FDT_PAD;
134 /* If fdt_high is set use it to select the relocation address */
135 fdt_high = env_get("fdt_high");
137 void *desired_addr = (void *)simple_strtoul(fdt_high, NULL, 16);
139 if (((ulong) desired_addr) == ~0UL) {
140 /* All ones means use fdt in place */
142 lmb_reserve(lmb, (ulong)of_start, of_len);
143 disable_relocation = 1;
144 } else if (desired_addr) {
146 (void *)(ulong) lmb_alloc_base(lmb, of_len, 0x1000,
147 (ulong)desired_addr);
148 if (of_start == NULL) {
149 puts("Failed using fdt_high value for Device Tree");
154 (void *)(ulong) lmb_alloc(lmb, of_len, 0x1000);
158 (void *)(ulong) lmb_alloc_base(lmb, of_len, 0x1000,
159 env_get_bootm_mapsize()
160 + env_get_bootm_low());
163 if (of_start == NULL) {
164 puts("device tree - allocation error\n");
168 if (disable_relocation) {
170 * We assume there is space after the existing fdt to use
173 fdt_set_totalsize(of_start, of_len);
174 printf(" Using Device Tree in place at %p, end %p\n",
175 of_start, of_start + of_len - 1);
177 debug("## device tree at %p ... %p (len=%ld [0x%lX])\n",
178 fdt_blob, fdt_blob + *of_size - 1, of_len, of_len);
180 printf(" Loading Device Tree to %p, end %p ... ",
181 of_start, of_start + of_len - 1);
183 err = fdt_open_into(fdt_blob, of_start, of_len);
185 fdt_error("fdt move failed");
191 *of_flat_tree = of_start;
194 set_working_fdt_addr((ulong)*of_flat_tree);
202 * boot_get_fdt - main fdt handling routine
203 * @argc: command argument count
204 * @argv: command argument list
205 * @arch: architecture (IH_ARCH_...)
206 * @images: pointer to the bootm images structure
207 * @of_flat_tree: pointer to a char* variable, will hold fdt start address
208 * @of_size: pointer to a ulong variable, will hold fdt length
210 * boot_get_fdt() is responsible for finding a valid flat device tree image.
211 * Curently supported are the following ramdisk sources:
212 * - multicomponent kernel/ramdisk image,
213 * - commandline provided address of decicated ramdisk image.
216 * 0, if fdt image was found and valid, or skipped
217 * of_flat_tree and of_size are set to fdt start address and length if
218 * fdt image is found and valid
220 * 1, if fdt image is found but corrupted
221 * of_flat_tree and of_size are set to 0 if no fdt exists
223 int boot_get_fdt(int flag, int argc, char * const argv[], uint8_t arch,
224 bootm_headers_t *images, char **of_flat_tree, ulong *of_size)
226 #if defined(CONFIG_IMAGE_FORMAT_LEGACY)
227 const image_header_t *fdt_hdr;
228 ulong load, load_end;
229 ulong image_start, image_data, image_end;
232 char *fdt_blob = NULL;
234 #if CONFIG_IS_ENABLED(FIT)
235 const char *fit_uname_config = images->fit_uname_cfg;
236 const char *fit_uname_fdt = NULL;
240 const char *select = NULL;
243 *of_flat_tree = NULL;
248 if (select || genimg_has_config(images)) {
249 #if CONFIG_IS_ENABLED(FIT)
252 * If the FDT blob comes from the FIT image and the
253 * FIT image address is omitted in the command line
254 * argument, try to use ramdisk or os FIT image
255 * address or default load address.
257 if (images->fit_uname_rd)
258 default_addr = (ulong)images->fit_hdr_rd;
259 else if (images->fit_uname_os)
260 default_addr = (ulong)images->fit_hdr_os;
262 default_addr = load_addr;
264 if (fit_parse_conf(select, default_addr,
265 &fdt_addr, &fit_uname_config)) {
266 debug("* fdt: config '%s' from image at 0x%08lx\n",
267 fit_uname_config, fdt_addr);
268 } else if (fit_parse_subimage(select, default_addr,
269 &fdt_addr, &fit_uname_fdt)) {
270 debug("* fdt: subimage '%s' from image at 0x%08lx\n",
271 fit_uname_fdt, fdt_addr);
275 fdt_addr = simple_strtoul(select, NULL, 16);
276 debug("* fdt: cmdline image address = 0x%08lx\n",
279 #if CONFIG_IS_ENABLED(FIT)
281 /* use FIT configuration provided in first bootm
284 fdt_addr = map_to_sysmem(images->fit_hdr_os);
285 fdt_noffset = fit_get_node_from_config(images,
288 if (fdt_noffset == -ENOENT)
290 else if (fdt_noffset < 0)
294 debug("## Checking for 'FDT'/'FDT Image' at %08lx\n",
298 * Check if there is an FDT image at the
299 * address provided in the second bootm argument
300 * check image type, for FIT images get a FIT node.
302 buf = map_sysmem(fdt_addr, 0);
303 switch (genimg_get_format(buf)) {
304 #if defined(CONFIG_IMAGE_FORMAT_LEGACY)
305 case IMAGE_FORMAT_LEGACY:
306 /* verify fdt_addr points to a valid image header */
307 printf("## Flattened Device Tree from Legacy Image at %08lx\n",
309 fdt_hdr = image_get_fdt(fdt_addr);
314 * move image data to the load address,
315 * make sure we don't overwrite initial image
317 image_start = (ulong)fdt_hdr;
318 image_data = (ulong)image_get_data(fdt_hdr);
319 image_end = image_get_image_end(fdt_hdr);
321 load = image_get_load(fdt_hdr);
322 load_end = load + image_get_data_size(fdt_hdr);
324 if (load == image_start ||
325 load == image_data) {
330 if ((load < image_end) && (load_end > image_start)) {
331 fdt_error("fdt overwritten");
335 debug(" Loading FDT from 0x%08lx to 0x%08lx\n",
338 memmove((void *)load,
340 image_get_data_size(fdt_hdr));
345 case IMAGE_FORMAT_FIT:
347 * This case will catch both: new uImage format
348 * (libfdt based) and raw FDT blob (also libfdt
351 #if CONFIG_IS_ENABLED(FIT)
352 /* check FDT blob vs FIT blob */
353 if (fit_check_format(buf)) {
356 fdt_noffset = boot_get_fdt_fit(images,
357 fdt_addr, &fit_uname_fdt,
361 images->fit_hdr_fdt = map_sysmem(fdt_addr, 0);
362 images->fit_uname_fdt = fit_uname_fdt;
363 images->fit_noffset_fdt = fdt_noffset;
373 debug("* fdt: raw FDT blob\n");
374 printf("## Flattened Device Tree blob at %08lx\n",
379 puts("ERROR: Did not find a cmdline Flattened Device Tree\n");
383 printf(" Booting using the fdt blob at %#08lx\n", fdt_addr);
384 fdt_blob = map_sysmem(fdt_addr, 0);
385 } else if (images->legacy_hdr_valid &&
386 image_check_type(&images->legacy_hdr_os_copy,
388 ulong fdt_data, fdt_len;
391 * Now check if we have a legacy multi-component image,
392 * get second entry data start address and len.
394 printf("## Flattened Device Tree from multi component Image at %08lX\n",
395 (ulong)images->legacy_hdr_os);
397 image_multi_getimg(images->legacy_hdr_os, 2, &fdt_data,
400 fdt_blob = (char *)fdt_data;
401 printf(" Booting using the fdt at 0x%p\n", fdt_blob);
403 if (fdt_check_header(fdt_blob) != 0) {
404 fdt_error("image is not a fdt");
408 if (fdt_totalsize(fdt_blob) != fdt_len) {
409 fdt_error("fdt size != image size");
413 debug("## No Flattened Device Tree\n");
417 debug("## No Flattened Device Tree\n");
421 *of_flat_tree = fdt_blob;
422 *of_size = fdt_totalsize(fdt_blob);
423 debug(" of_flat_tree at 0x%08lx size 0x%08lx\n",
424 (ulong)*of_flat_tree, *of_size);
431 *of_flat_tree = NULL;
433 if (!select && ok_no_fdt) {
434 debug("Continuing to boot without FDT\n");
441 * Verify the device tree.
443 * This function is called after all device tree fix-ups have been enacted,
444 * so that the final device tree can be verified. The definition of "verified"
445 * is up to the specific implementation. However, it generally means that the
446 * addresses of some of the devices in the device tree are compared with the
447 * actual addresses at which U-Boot has placed them.
449 * Returns 1 on success, 0 on failure. If 0 is returned, U-Boot will halt the
452 __weak int ft_verify_fdt(void *fdt)
457 int image_setup_libfdt(bootm_headers_t *images, void *blob,
458 int of_size, struct lmb *lmb)
460 ulong *initrd_start = &images->initrd_start;
461 ulong *initrd_end = &images->initrd_end;
465 if (fdt_root(blob) < 0) {
466 printf("ERROR: root node setup failed\n");
469 if (fdt_chosen(blob) < 0) {
470 printf("ERROR: /chosen node create failed\n");
473 if (arch_fixup_fdt(blob) < 0) {
474 printf("ERROR: arch-specific fdt fixup failed\n");
477 /* Update ethernet nodes */
478 fdt_fixup_ethernet(blob);
479 if (IMAGE_OF_BOARD_SETUP) {
480 fdt_ret = ft_board_setup(blob, gd->bd);
482 printf("ERROR: board-specific fdt fixup failed: %s\n",
483 fdt_strerror(fdt_ret));
487 if (IMAGE_OF_SYSTEM_SETUP) {
488 fdt_ret = ft_system_setup(blob, gd->bd);
490 printf("ERROR: system-specific fdt fixup failed: %s\n",
491 fdt_strerror(fdt_ret));
496 /* Delete the old LMB reservation */
498 lmb_free(lmb, (phys_addr_t)(u32)(uintptr_t)blob,
499 (phys_size_t)fdt_totalsize(blob));
501 ret = fdt_shrink_to_minimum(blob, 0);
506 if (*initrd_start && *initrd_end) {
507 of_size += FDT_RAMDISK_OVERHEAD;
508 fdt_set_totalsize(blob, of_size);
510 /* Create a new LMB reservation */
512 lmb_reserve(lmb, (ulong)blob, of_size);
514 fdt_initrd(blob, *initrd_start, *initrd_end);
515 if (!ft_verify_fdt(blob))
518 #if defined(CONFIG_SOC_KEYSTONE)
519 if (IMAGE_OF_BOARD_SETUP)
520 ft_board_setup_ex(blob, gd->bd);
525 printf(" - must RESET the board to recover.\n\n");