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>
17 #include <linux/libfdt.h>
20 #include <tee/optee.h>
22 #ifndef CONFIG_SYS_FDT_PAD
23 #define CONFIG_SYS_FDT_PAD 0x3000
26 /* adding a ramdisk needs 0x44 bytes in version 2008.10 */
27 #define FDT_RAMDISK_OVERHEAD 0x80
29 DECLARE_GLOBAL_DATA_PTR;
31 static void fdt_error(const char *msg)
35 puts(" - must RESET the board to recover.\n");
38 #if CONFIG_IS_ENABLED(LEGACY_IMAGE_FORMAT)
39 static const image_header_t *image_get_fdt(ulong fdt_addr)
41 const image_header_t *fdt_hdr = map_sysmem(fdt_addr, 0);
43 image_print_contents(fdt_hdr);
45 puts(" Verifying Checksum ... ");
46 if (!image_check_hcrc(fdt_hdr)) {
47 fdt_error("fdt header checksum invalid");
51 if (!image_check_dcrc(fdt_hdr)) {
52 fdt_error("fdt checksum invalid");
57 if (!image_check_type(fdt_hdr, IH_TYPE_FLATDT)) {
58 fdt_error("uImage is not a fdt");
61 if (image_get_comp(fdt_hdr) != IH_COMP_NONE) {
62 fdt_error("uImage is compressed");
65 if (fdt_check_header((void *)image_get_data(fdt_hdr)) != 0) {
66 fdt_error("uImage data is not a fdt");
73 static void boot_fdt_reserve_region(struct lmb *lmb, uint64_t addr,
78 ret = lmb_reserve(lmb, addr, size);
80 debug(" reserving fdt memory region: addr=%llx size=%llx\n",
81 (unsigned long long)addr, (unsigned long long)size);
83 puts("ERROR: reserving fdt memory region failed ");
84 printf("(addr=%llx size=%llx)\n",
85 (unsigned long long)addr, (unsigned long long)size);
90 * boot_fdt_add_mem_rsv_regions - Mark the memreserve and reserved-memory
91 * sections as unusable
92 * @lmb: pointer to lmb handle, will be used for memory mgmt
93 * @fdt_blob: pointer to fdt blob base address
95 * Adds the and reserved-memorymemreserve regions in the dtb to the lmb block.
96 * Adding the memreserve regions prevents u-boot from using them to store the
97 * initrd or the fdt blob.
99 void boot_fdt_add_mem_rsv_regions(struct lmb *lmb, void *fdt_blob)
103 int nodeoffset, subnode;
104 struct fdt_resource res;
106 if (fdt_check_header(fdt_blob) != 0)
109 /* process memreserve sections */
110 total = fdt_num_mem_rsv(fdt_blob);
111 for (i = 0; i < total; i++) {
112 if (fdt_get_mem_rsv(fdt_blob, i, &addr, &size) != 0)
114 boot_fdt_reserve_region(lmb, addr, size);
117 /* process reserved-memory */
118 nodeoffset = fdt_subnode_offset(fdt_blob, 0, "reserved-memory");
119 if (nodeoffset >= 0) {
120 subnode = fdt_first_subnode(fdt_blob, nodeoffset);
121 while (subnode >= 0) {
122 /* check if this subnode has a reg property */
123 ret = fdt_get_resource(fdt_blob, subnode, "reg", 0,
127 size = res.end - res.start + 1;
128 boot_fdt_reserve_region(lmb, addr, size);
131 subnode = fdt_next_subnode(fdt_blob, subnode);
137 * boot_relocate_fdt - relocate flat device tree
138 * @lmb: pointer to lmb handle, will be used for memory mgmt
139 * @of_flat_tree: pointer to a char* variable, will hold fdt start address
140 * @of_size: pointer to a ulong variable, will hold fdt length
142 * boot_relocate_fdt() allocates a region of memory within the bootmap and
143 * relocates the of_flat_tree into that region, even if the fdt is already in
144 * the bootmap. It also expands the size of the fdt by CONFIG_SYS_FDT_PAD
147 * of_flat_tree and of_size are set to final (after relocation) values
153 int boot_relocate_fdt(struct lmb *lmb, char **of_flat_tree, ulong *of_size)
155 void *fdt_blob = *of_flat_tree;
156 void *of_start = NULL;
160 int disable_relocation = 0;
166 if (fdt_check_header(fdt_blob) != 0) {
167 fdt_error("image is not a fdt");
171 /* position on a 4K boundary before the alloc_current */
172 /* Pad the FDT by a specified amount */
173 of_len = *of_size + CONFIG_SYS_FDT_PAD;
175 /* If fdt_high is set use it to select the relocation address */
176 fdt_high = env_get("fdt_high");
178 void *desired_addr = (void *)simple_strtoul(fdt_high, NULL, 16);
180 if (((ulong) desired_addr) == ~0UL) {
181 /* All ones means use fdt in place */
183 lmb_reserve(lmb, (ulong)of_start, of_len);
184 disable_relocation = 1;
185 } else if (desired_addr) {
187 (void *)(ulong) lmb_alloc_base(lmb, of_len, 0x1000,
188 (ulong)desired_addr);
189 if (of_start == NULL) {
190 puts("Failed using fdt_high value for Device Tree");
195 (void *)(ulong) lmb_alloc(lmb, of_len, 0x1000);
199 (void *)(ulong) lmb_alloc_base(lmb, of_len, 0x1000,
200 env_get_bootm_mapsize()
201 + env_get_bootm_low());
204 if (of_start == NULL) {
205 puts("device tree - allocation error\n");
209 if (disable_relocation) {
211 * We assume there is space after the existing fdt to use
214 fdt_set_totalsize(of_start, of_len);
215 printf(" Using Device Tree in place at %p, end %p\n",
216 of_start, of_start + of_len - 1);
218 debug("## device tree at %p ... %p (len=%ld [0x%lX])\n",
219 fdt_blob, fdt_blob + *of_size - 1, of_len, of_len);
221 printf(" Loading Device Tree to %p, end %p ... ",
222 of_start, of_start + of_len - 1);
224 err = fdt_open_into(fdt_blob, of_start, of_len);
226 fdt_error("fdt move failed");
232 *of_flat_tree = of_start;
235 if (CONFIG_IS_ENABLED(CMD_FDT))
236 set_working_fdt_addr(map_to_sysmem(*of_flat_tree));
244 * boot_get_fdt - main fdt handling routine
245 * @argc: command argument count
246 * @argv: command argument list
247 * @arch: architecture (IH_ARCH_...)
248 * @images: pointer to the bootm images structure
249 * @of_flat_tree: pointer to a char* variable, will hold fdt start address
250 * @of_size: pointer to a ulong variable, will hold fdt length
252 * boot_get_fdt() is responsible for finding a valid flat device tree image.
253 * Curently supported are the following ramdisk sources:
254 * - multicomponent kernel/ramdisk image,
255 * - commandline provided address of decicated ramdisk image.
258 * 0, if fdt image was found and valid, or skipped
259 * of_flat_tree and of_size are set to fdt start address and length if
260 * fdt image is found and valid
262 * 1, if fdt image is found but corrupted
263 * of_flat_tree and of_size are set to 0 if no fdt exists
265 int boot_get_fdt(int flag, int argc, char * const argv[], uint8_t arch,
266 bootm_headers_t *images, char **of_flat_tree, ulong *of_size)
268 #if CONFIG_IS_ENABLED(LEGACY_IMAGE_FORMAT)
269 const image_header_t *fdt_hdr;
270 ulong load, load_end;
271 ulong image_start, image_data, image_end;
275 char *fdt_blob = NULL;
277 #if CONFIG_IS_ENABLED(FIT)
278 const char *fit_uname_config = images->fit_uname_cfg;
279 const char *fit_uname_fdt = NULL;
283 const char *select = NULL;
285 *of_flat_tree = NULL;
288 img_addr = (argc == 0) ? image_load_addr :
289 simple_strtoul(argv[0], NULL, 16);
290 buf = map_sysmem(img_addr, 0);
294 if (select || genimg_has_config(images)) {
295 #if CONFIG_IS_ENABLED(FIT)
298 * If the FDT blob comes from the FIT image and the
299 * FIT image address is omitted in the command line
300 * argument, try to use ramdisk or os FIT image
301 * address or default load address.
303 if (images->fit_uname_rd)
304 default_addr = (ulong)images->fit_hdr_rd;
305 else if (images->fit_uname_os)
306 default_addr = (ulong)images->fit_hdr_os;
308 default_addr = image_load_addr;
310 if (fit_parse_conf(select, default_addr,
311 &fdt_addr, &fit_uname_config)) {
312 debug("* fdt: config '%s' from image at 0x%08lx\n",
313 fit_uname_config, fdt_addr);
314 } else if (fit_parse_subimage(select, default_addr,
315 &fdt_addr, &fit_uname_fdt)) {
316 debug("* fdt: subimage '%s' from image at 0x%08lx\n",
317 fit_uname_fdt, fdt_addr);
321 fdt_addr = simple_strtoul(select, NULL, 16);
322 debug("* fdt: cmdline image address = 0x%08lx\n",
325 #if CONFIG_IS_ENABLED(FIT)
327 /* use FIT configuration provided in first bootm
330 fdt_addr = map_to_sysmem(images->fit_hdr_os);
331 fdt_noffset = fit_get_node_from_config(images,
334 if (fdt_noffset == -ENOENT)
336 else if (fdt_noffset < 0)
340 debug("## Checking for 'FDT'/'FDT Image' at %08lx\n",
344 * Check if there is an FDT image at the
345 * address provided in the second bootm argument
346 * check image type, for FIT images get a FIT node.
348 buf = map_sysmem(fdt_addr, 0);
349 switch (genimg_get_format(buf)) {
350 #if CONFIG_IS_ENABLED(LEGACY_IMAGE_FORMAT)
351 case IMAGE_FORMAT_LEGACY:
352 /* verify fdt_addr points to a valid image header */
353 printf("## Flattened Device Tree from Legacy Image at %08lx\n",
355 fdt_hdr = image_get_fdt(fdt_addr);
360 * move image data to the load address,
361 * make sure we don't overwrite initial image
363 image_start = (ulong)fdt_hdr;
364 image_data = (ulong)image_get_data(fdt_hdr);
365 image_end = image_get_image_end(fdt_hdr);
367 load = image_get_load(fdt_hdr);
368 load_end = load + image_get_data_size(fdt_hdr);
370 if (load == image_start ||
371 load == image_data) {
376 if ((load < image_end) && (load_end > image_start)) {
377 fdt_error("fdt overwritten");
381 debug(" Loading FDT from 0x%08lx to 0x%08lx\n",
384 memmove((void *)load,
386 image_get_data_size(fdt_hdr));
391 case IMAGE_FORMAT_FIT:
393 * This case will catch both: new uImage format
394 * (libfdt based) and raw FDT blob (also libfdt
397 #if CONFIG_IS_ENABLED(FIT)
398 /* check FDT blob vs FIT blob */
399 if (fit_check_format(buf)) {
402 fdt_noffset = boot_get_fdt_fit(images,
403 fdt_addr, &fit_uname_fdt,
407 images->fit_hdr_fdt = map_sysmem(fdt_addr, 0);
408 images->fit_uname_fdt = fit_uname_fdt;
409 images->fit_noffset_fdt = fdt_noffset;
419 debug("* fdt: raw FDT blob\n");
420 printf("## Flattened Device Tree blob at %08lx\n",
425 puts("ERROR: Did not find a cmdline Flattened Device Tree\n");
429 printf(" Booting using the fdt blob at %#08lx\n", fdt_addr);
430 fdt_blob = map_sysmem(fdt_addr, 0);
431 } else if (images->legacy_hdr_valid &&
432 image_check_type(&images->legacy_hdr_os_copy,
434 ulong fdt_data, fdt_len;
437 * Now check if we have a legacy multi-component image,
438 * get second entry data start address and len.
440 printf("## Flattened Device Tree from multi component Image at %08lX\n",
441 (ulong)images->legacy_hdr_os);
443 image_multi_getimg(images->legacy_hdr_os, 2, &fdt_data,
446 fdt_blob = (char *)fdt_data;
447 printf(" Booting using the fdt at 0x%p\n", fdt_blob);
449 if (fdt_check_header(fdt_blob) != 0) {
450 fdt_error("image is not a fdt");
454 if (fdt_totalsize(fdt_blob) != fdt_len) {
455 fdt_error("fdt size != image size");
459 debug("## No Flattened Device Tree\n");
462 #ifdef CONFIG_ANDROID_BOOT_IMAGE
463 } else if (genimg_get_format(buf) == IMAGE_FORMAT_ANDROID) {
464 struct andr_img_hdr *hdr = buf;
465 ulong fdt_data, fdt_len;
467 if (!android_image_get_second(hdr, &fdt_data, &fdt_len) &&
468 !fdt_check_header((char *)fdt_data)) {
469 fdt_blob = (char *)fdt_data;
470 if (fdt_totalsize(fdt_blob) != fdt_len)
473 debug("## Using FDT in Android image second area\n");
475 fdt_addr = env_get_hex("fdtaddr", 0);
479 fdt_blob = map_sysmem(fdt_addr, 0);
480 if (fdt_check_header(fdt_blob))
483 debug("## Using FDT at ${fdtaddr}=Ox%lx\n", fdt_addr);
487 debug("## No Flattened Device Tree\n");
491 *of_flat_tree = fdt_blob;
492 *of_size = fdt_totalsize(fdt_blob);
493 debug(" of_flat_tree at 0x%08lx size 0x%08lx\n",
494 (ulong)*of_flat_tree, *of_size);
499 debug("Continuing to boot without FDT\n");
506 * Verify the device tree.
508 * This function is called after all device tree fix-ups have been enacted,
509 * so that the final device tree can be verified. The definition of "verified"
510 * is up to the specific implementation. However, it generally means that the
511 * addresses of some of the devices in the device tree are compared with the
512 * actual addresses at which U-Boot has placed them.
514 * Returns 1 on success, 0 on failure. If 0 is returned, U-Boot will halt the
517 __weak int ft_verify_fdt(void *fdt)
522 __weak int arch_fixup_fdt(void *blob)
527 int image_setup_libfdt(bootm_headers_t *images, void *blob,
528 int of_size, struct lmb *lmb)
530 ulong *initrd_start = &images->initrd_start;
531 ulong *initrd_end = &images->initrd_end;
535 if (fdt_root(blob) < 0) {
536 printf("ERROR: root node setup failed\n");
539 if (fdt_chosen(blob) < 0) {
540 printf("ERROR: /chosen node create failed\n");
543 if (arch_fixup_fdt(blob) < 0) {
544 printf("ERROR: arch-specific fdt fixup failed\n");
547 /* Update ethernet nodes */
548 fdt_fixup_ethernet(blob);
549 if (IMAGE_OF_BOARD_SETUP) {
550 fdt_ret = ft_board_setup(blob, gd->bd);
552 printf("ERROR: board-specific fdt fixup failed: %s\n",
553 fdt_strerror(fdt_ret));
557 if (IMAGE_OF_SYSTEM_SETUP) {
558 fdt_ret = ft_system_setup(blob, gd->bd);
560 printf("ERROR: system-specific fdt fixup failed: %s\n",
561 fdt_strerror(fdt_ret));
566 fdt_ret = optee_copy_fdt_nodes(gd->fdt_blob, blob);
568 printf("ERROR: transfer of optee nodes to new fdt failed: %s\n",
569 fdt_strerror(fdt_ret));
573 /* Delete the old LMB reservation */
575 lmb_free(lmb, (phys_addr_t)(u32)(uintptr_t)blob,
576 (phys_size_t)fdt_totalsize(blob));
578 ret = fdt_shrink_to_minimum(blob, 0);
583 if (*initrd_start && *initrd_end) {
584 of_size += FDT_RAMDISK_OVERHEAD;
585 fdt_set_totalsize(blob, of_size);
587 /* Create a new LMB reservation */
589 lmb_reserve(lmb, (ulong)blob, of_size);
591 fdt_initrd(blob, *initrd_start, *initrd_end);
592 if (!ft_verify_fdt(blob))
595 #if defined(CONFIG_SOC_KEYSTONE)
596 if (IMAGE_OF_BOARD_SETUP)
597 ft_board_setup_ex(blob, gd->bd);
602 printf(" - must RESET the board to recover.\n\n");