image-fdt.c 17 KB

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  1. // SPDX-License-Identifier: GPL-2.0+
  2. /*
  3. * Copyright (c) 2013, Google Inc.
  4. *
  5. * (C) Copyright 2008 Semihalf
  6. *
  7. * (C) Copyright 2000-2006
  8. * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
  9. */
  10. #include <common.h>
  11. #include <fdt_support.h>
  12. #include <fdtdec.h>
  13. #include <env.h>
  14. #include <errno.h>
  15. #include <image.h>
  16. #include <lmb.h>
  17. #include <log.h>
  18. #include <malloc.h>
  19. #include <asm/global_data.h>
  20. #include <linux/libfdt.h>
  21. #include <mapmem.h>
  22. #include <asm/io.h>
  23. #include <tee/optee.h>
  24. #ifndef CONFIG_SYS_FDT_PAD
  25. #define CONFIG_SYS_FDT_PAD 0x3000
  26. #endif
  27. /* adding a ramdisk needs 0x44 bytes in version 2008.10 */
  28. #define FDT_RAMDISK_OVERHEAD 0x80
  29. DECLARE_GLOBAL_DATA_PTR;
  30. static void fdt_error(const char *msg)
  31. {
  32. puts("ERROR: ");
  33. puts(msg);
  34. puts(" - must RESET the board to recover.\n");
  35. }
  36. #if CONFIG_IS_ENABLED(LEGACY_IMAGE_FORMAT)
  37. static const image_header_t *image_get_fdt(ulong fdt_addr)
  38. {
  39. const image_header_t *fdt_hdr = map_sysmem(fdt_addr, 0);
  40. image_print_contents(fdt_hdr);
  41. puts(" Verifying Checksum ... ");
  42. if (!image_check_hcrc(fdt_hdr)) {
  43. fdt_error("fdt header checksum invalid");
  44. return NULL;
  45. }
  46. if (!image_check_dcrc(fdt_hdr)) {
  47. fdt_error("fdt checksum invalid");
  48. return NULL;
  49. }
  50. puts("OK\n");
  51. if (!image_check_type(fdt_hdr, IH_TYPE_FLATDT)) {
  52. fdt_error("uImage is not a fdt");
  53. return NULL;
  54. }
  55. if (image_get_comp(fdt_hdr) != IH_COMP_NONE) {
  56. fdt_error("uImage is compressed");
  57. return NULL;
  58. }
  59. if (fdt_check_header((void *)image_get_data(fdt_hdr)) != 0) {
  60. fdt_error("uImage data is not a fdt");
  61. return NULL;
  62. }
  63. return fdt_hdr;
  64. }
  65. #endif
  66. static void boot_fdt_reserve_region(struct lmb *lmb, uint64_t addr,
  67. uint64_t size, enum lmb_flags flags)
  68. {
  69. long ret;
  70. ret = lmb_reserve_flags(lmb, addr, size, flags);
  71. if (ret >= 0) {
  72. debug(" reserving fdt memory region: addr=%llx size=%llx flags=%x\n",
  73. (unsigned long long)addr,
  74. (unsigned long long)size, flags);
  75. } else {
  76. puts("ERROR: reserving fdt memory region failed ");
  77. printf("(addr=%llx size=%llx flags=%x)\n",
  78. (unsigned long long)addr,
  79. (unsigned long long)size, flags);
  80. }
  81. }
  82. /**
  83. * boot_fdt_add_mem_rsv_regions - Mark the memreserve and reserved-memory
  84. * sections as unusable
  85. * @lmb: pointer to lmb handle, will be used for memory mgmt
  86. * @fdt_blob: pointer to fdt blob base address
  87. *
  88. * Adds the and reserved-memorymemreserve regions in the dtb to the lmb block.
  89. * Adding the memreserve regions prevents u-boot from using them to store the
  90. * initrd or the fdt blob.
  91. */
  92. void boot_fdt_add_mem_rsv_regions(struct lmb *lmb, void *fdt_blob)
  93. {
  94. uint64_t addr, size;
  95. int i, total, ret;
  96. int nodeoffset, subnode;
  97. struct fdt_resource res;
  98. enum lmb_flags flags;
  99. if (fdt_check_header(fdt_blob) != 0)
  100. return;
  101. /* process memreserve sections */
  102. total = fdt_num_mem_rsv(fdt_blob);
  103. for (i = 0; i < total; i++) {
  104. if (fdt_get_mem_rsv(fdt_blob, i, &addr, &size) != 0)
  105. continue;
  106. boot_fdt_reserve_region(lmb, addr, size, LMB_NONE);
  107. }
  108. /* process reserved-memory */
  109. nodeoffset = fdt_subnode_offset(fdt_blob, 0, "reserved-memory");
  110. if (nodeoffset >= 0) {
  111. subnode = fdt_first_subnode(fdt_blob, nodeoffset);
  112. while (subnode >= 0) {
  113. /* check if this subnode has a reg property */
  114. ret = fdt_get_resource(fdt_blob, subnode, "reg", 0,
  115. &res);
  116. if (!ret && fdtdec_get_is_enabled(fdt_blob, subnode)) {
  117. flags = LMB_NONE;
  118. if (fdtdec_get_bool(fdt_blob, subnode,
  119. "no-map"))
  120. flags = LMB_NOMAP;
  121. addr = res.start;
  122. size = res.end - res.start + 1;
  123. boot_fdt_reserve_region(lmb, addr, size, flags);
  124. }
  125. subnode = fdt_next_subnode(fdt_blob, subnode);
  126. }
  127. }
  128. }
  129. /**
  130. * boot_relocate_fdt - relocate flat device tree
  131. * @lmb: pointer to lmb handle, will be used for memory mgmt
  132. * @of_flat_tree: pointer to a char* variable, will hold fdt start address
  133. * @of_size: pointer to a ulong variable, will hold fdt length
  134. *
  135. * boot_relocate_fdt() allocates a region of memory within the bootmap and
  136. * relocates the of_flat_tree into that region, even if the fdt is already in
  137. * the bootmap. It also expands the size of the fdt by CONFIG_SYS_FDT_PAD
  138. * bytes.
  139. *
  140. * of_flat_tree and of_size are set to final (after relocation) values
  141. *
  142. * returns:
  143. * 0 - success
  144. * 1 - failure
  145. */
  146. int boot_relocate_fdt(struct lmb *lmb, char **of_flat_tree, ulong *of_size)
  147. {
  148. void *fdt_blob = *of_flat_tree;
  149. void *of_start = NULL;
  150. char *fdt_high;
  151. ulong of_len = 0;
  152. int err;
  153. int disable_relocation = 0;
  154. /* nothing to do */
  155. if (*of_size == 0)
  156. return 0;
  157. if (fdt_check_header(fdt_blob) != 0) {
  158. fdt_error("image is not a fdt");
  159. goto error;
  160. }
  161. /* position on a 4K boundary before the alloc_current */
  162. /* Pad the FDT by a specified amount */
  163. of_len = *of_size + CONFIG_SYS_FDT_PAD;
  164. /* If fdt_high is set use it to select the relocation address */
  165. fdt_high = env_get("fdt_high");
  166. if (fdt_high) {
  167. void *desired_addr = (void *)hextoul(fdt_high, NULL);
  168. if (((ulong) desired_addr) == ~0UL) {
  169. /* All ones means use fdt in place */
  170. of_start = fdt_blob;
  171. lmb_reserve(lmb, (ulong)of_start, of_len);
  172. disable_relocation = 1;
  173. } else if (desired_addr) {
  174. of_start =
  175. (void *)(ulong) lmb_alloc_base(lmb, of_len, 0x1000,
  176. (ulong)desired_addr);
  177. if (of_start == NULL) {
  178. puts("Failed using fdt_high value for Device Tree");
  179. goto error;
  180. }
  181. } else {
  182. of_start =
  183. (void *)(ulong) lmb_alloc(lmb, of_len, 0x1000);
  184. }
  185. } else {
  186. of_start =
  187. (void *)(ulong) lmb_alloc_base(lmb, of_len, 0x1000,
  188. env_get_bootm_mapsize()
  189. + env_get_bootm_low());
  190. }
  191. if (of_start == NULL) {
  192. puts("device tree - allocation error\n");
  193. goto error;
  194. }
  195. if (disable_relocation) {
  196. /*
  197. * We assume there is space after the existing fdt to use
  198. * for padding
  199. */
  200. fdt_set_totalsize(of_start, of_len);
  201. printf(" Using Device Tree in place at %p, end %p\n",
  202. of_start, of_start + of_len - 1);
  203. } else {
  204. debug("## device tree at %p ... %p (len=%ld [0x%lX])\n",
  205. fdt_blob, fdt_blob + *of_size - 1, of_len, of_len);
  206. printf(" Loading Device Tree to %p, end %p ... ",
  207. of_start, of_start + of_len - 1);
  208. err = fdt_open_into(fdt_blob, of_start, of_len);
  209. if (err != 0) {
  210. fdt_error("fdt move failed");
  211. goto error;
  212. }
  213. puts("OK\n");
  214. }
  215. *of_flat_tree = of_start;
  216. *of_size = of_len;
  217. if (CONFIG_IS_ENABLED(CMD_FDT))
  218. set_working_fdt_addr(map_to_sysmem(*of_flat_tree));
  219. return 0;
  220. error:
  221. return 1;
  222. }
  223. /**
  224. * select_fdt() - Select and locate the FDT to use
  225. *
  226. * @images: pointer to the bootm images structure
  227. * @select: name of FDT to select, or NULL for any
  228. * @arch: expected FDT architecture
  229. * @fdt_addrp: pointer to a ulong variable, will hold FDT pointer
  230. * Return: 0 if OK, -ENOPKG if no FDT (but an error should not be reported),
  231. * other -ve value on other error
  232. */
  233. static int select_fdt(bootm_headers_t *images, const char *select, u8 arch,
  234. ulong *fdt_addrp)
  235. {
  236. const char *buf;
  237. ulong fdt_addr;
  238. #if CONFIG_IS_ENABLED(FIT)
  239. const char *fit_uname_config = images->fit_uname_cfg;
  240. const char *fit_uname_fdt = NULL;
  241. ulong default_addr;
  242. int fdt_noffset;
  243. if (select) {
  244. /*
  245. * If the FDT blob comes from the FIT image and the
  246. * FIT image address is omitted in the command line
  247. * argument, try to use ramdisk or os FIT image
  248. * address or default load address.
  249. */
  250. if (images->fit_uname_rd)
  251. default_addr = (ulong)images->fit_hdr_rd;
  252. else if (images->fit_uname_os)
  253. default_addr = (ulong)images->fit_hdr_os;
  254. else
  255. default_addr = image_load_addr;
  256. if (fit_parse_conf(select, default_addr, &fdt_addr,
  257. &fit_uname_config)) {
  258. debug("* fdt: config '%s' from image at 0x%08lx\n",
  259. fit_uname_config, fdt_addr);
  260. } else if (fit_parse_subimage(select, default_addr, &fdt_addr,
  261. &fit_uname_fdt)) {
  262. debug("* fdt: subimage '%s' from image at 0x%08lx\n",
  263. fit_uname_fdt, fdt_addr);
  264. } else
  265. #endif
  266. {
  267. fdt_addr = hextoul(select, NULL);
  268. debug("* fdt: cmdline image address = 0x%08lx\n",
  269. fdt_addr);
  270. }
  271. #if CONFIG_IS_ENABLED(FIT)
  272. } else {
  273. /* use FIT configuration provided in first bootm
  274. * command argument
  275. */
  276. fdt_addr = map_to_sysmem(images->fit_hdr_os);
  277. fdt_noffset = fit_get_node_from_config(images, FIT_FDT_PROP,
  278. fdt_addr);
  279. if (fdt_noffset == -ENOENT)
  280. return -ENOPKG;
  281. else if (fdt_noffset < 0)
  282. return fdt_noffset;
  283. }
  284. #endif
  285. debug("## Checking for 'FDT'/'FDT Image' at %08lx\n",
  286. fdt_addr);
  287. /*
  288. * Check if there is an FDT image at the
  289. * address provided in the second bootm argument
  290. * check image type, for FIT images get a FIT node.
  291. */
  292. buf = map_sysmem(fdt_addr, 0);
  293. switch (genimg_get_format(buf)) {
  294. #if CONFIG_IS_ENABLED(LEGACY_IMAGE_FORMAT)
  295. case IMAGE_FORMAT_LEGACY: {
  296. const image_header_t *fdt_hdr;
  297. ulong load, load_end;
  298. ulong image_start, image_data, image_end;
  299. /* verify fdt_addr points to a valid image header */
  300. printf("## Flattened Device Tree from Legacy Image at %08lx\n",
  301. fdt_addr);
  302. fdt_hdr = image_get_fdt(fdt_addr);
  303. if (!fdt_hdr)
  304. return -ENOPKG;
  305. /*
  306. * move image data to the load address,
  307. * make sure we don't overwrite initial image
  308. */
  309. image_start = (ulong)fdt_hdr;
  310. image_data = (ulong)image_get_data(fdt_hdr);
  311. image_end = image_get_image_end(fdt_hdr);
  312. load = image_get_load(fdt_hdr);
  313. load_end = load + image_get_data_size(fdt_hdr);
  314. if (load == image_start ||
  315. load == image_data) {
  316. fdt_addr = load;
  317. break;
  318. }
  319. if ((load < image_end) && (load_end > image_start)) {
  320. fdt_error("fdt overwritten");
  321. return -EFAULT;
  322. }
  323. debug(" Loading FDT from 0x%08lx to 0x%08lx\n",
  324. image_data, load);
  325. memmove((void *)load,
  326. (void *)image_data,
  327. image_get_data_size(fdt_hdr));
  328. fdt_addr = load;
  329. break;
  330. }
  331. #endif
  332. case IMAGE_FORMAT_FIT:
  333. /*
  334. * This case will catch both: new uImage format
  335. * (libfdt based) and raw FDT blob (also libfdt
  336. * based).
  337. */
  338. #if CONFIG_IS_ENABLED(FIT)
  339. /* check FDT blob vs FIT blob */
  340. if (!fit_check_format(buf, IMAGE_SIZE_INVAL)) {
  341. ulong load, len;
  342. fdt_noffset = boot_get_fdt_fit(images, fdt_addr,
  343. &fit_uname_fdt,
  344. &fit_uname_config,
  345. arch, &load, &len);
  346. if (fdt_noffset < 0)
  347. return -ENOENT;
  348. images->fit_hdr_fdt = map_sysmem(fdt_addr, 0);
  349. images->fit_uname_fdt = fit_uname_fdt;
  350. images->fit_noffset_fdt = fdt_noffset;
  351. fdt_addr = load;
  352. break;
  353. } else
  354. #endif
  355. {
  356. /*
  357. * FDT blob
  358. */
  359. debug("* fdt: raw FDT blob\n");
  360. printf("## Flattened Device Tree blob at %08lx\n",
  361. (long)fdt_addr);
  362. }
  363. break;
  364. default:
  365. puts("ERROR: Did not find a cmdline Flattened Device Tree\n");
  366. return -ENOENT;
  367. }
  368. *fdt_addrp = fdt_addr;
  369. return 0;
  370. }
  371. /**
  372. * boot_get_fdt - main fdt handling routine
  373. * @argc: command argument count
  374. * @argv: command argument list
  375. * @arch: architecture (IH_ARCH_...)
  376. * @images: pointer to the bootm images structure
  377. * @of_flat_tree: pointer to a char* variable, will hold fdt start address
  378. * @of_size: pointer to a ulong variable, will hold fdt length
  379. *
  380. * boot_get_fdt() is responsible for finding a valid flat device tree image.
  381. * Currently supported are the following ramdisk sources:
  382. * - multicomponent kernel/ramdisk image,
  383. * - commandline provided address of decicated ramdisk image.
  384. *
  385. * returns:
  386. * 0, if fdt image was found and valid, or skipped
  387. * of_flat_tree and of_size are set to fdt start address and length if
  388. * fdt image is found and valid
  389. *
  390. * 1, if fdt image is found but corrupted
  391. * of_flat_tree and of_size are set to 0 if no fdt exists
  392. */
  393. int boot_get_fdt(int flag, int argc, char *const argv[], uint8_t arch,
  394. bootm_headers_t *images, char **of_flat_tree, ulong *of_size)
  395. {
  396. ulong img_addr;
  397. ulong fdt_addr;
  398. char *fdt_blob = NULL;
  399. void *buf;
  400. const char *select = NULL;
  401. *of_flat_tree = NULL;
  402. *of_size = 0;
  403. img_addr = (argc == 0) ? image_load_addr : hextoul(argv[0], NULL);
  404. buf = map_sysmem(img_addr, 0);
  405. if (argc > 2)
  406. select = argv[2];
  407. if (select || genimg_has_config(images)) {
  408. int ret;
  409. ret = select_fdt(images, select, arch, &fdt_addr);
  410. if (ret == -ENOPKG)
  411. goto no_fdt;
  412. else if (ret)
  413. return 1;
  414. printf(" Booting using the fdt blob at %#08lx\n", fdt_addr);
  415. fdt_blob = map_sysmem(fdt_addr, 0);
  416. } else if (images->legacy_hdr_valid &&
  417. image_check_type(&images->legacy_hdr_os_copy,
  418. IH_TYPE_MULTI)) {
  419. ulong fdt_data, fdt_len;
  420. /*
  421. * Now check if we have a legacy multi-component image,
  422. * get second entry data start address and len.
  423. */
  424. printf("## Flattened Device Tree from multi component Image at %08lX\n",
  425. (ulong)images->legacy_hdr_os);
  426. image_multi_getimg(images->legacy_hdr_os, 2, &fdt_data,
  427. &fdt_len);
  428. if (fdt_len) {
  429. fdt_blob = (char *)fdt_data;
  430. printf(" Booting using the fdt at 0x%p\n", fdt_blob);
  431. if (fdt_check_header(fdt_blob) != 0) {
  432. fdt_error("image is not a fdt");
  433. goto error;
  434. }
  435. if (fdt_totalsize(fdt_blob) != fdt_len) {
  436. fdt_error("fdt size != image size");
  437. goto error;
  438. }
  439. } else {
  440. debug("## No Flattened Device Tree\n");
  441. goto no_fdt;
  442. }
  443. #ifdef CONFIG_ANDROID_BOOT_IMAGE
  444. } else if (genimg_get_format(buf) == IMAGE_FORMAT_ANDROID) {
  445. struct andr_img_hdr *hdr = buf;
  446. ulong fdt_data, fdt_len;
  447. u32 fdt_size, dtb_idx;
  448. /*
  449. * Firstly check if this android boot image has dtb field.
  450. */
  451. dtb_idx = (u32)env_get_ulong("adtb_idx", 10, 0);
  452. if (android_image_get_dtb_by_index((ulong)hdr, dtb_idx, &fdt_addr, &fdt_size)) {
  453. fdt_blob = (char *)map_sysmem(fdt_addr, 0);
  454. if (fdt_check_header(fdt_blob))
  455. goto no_fdt;
  456. debug("## Using FDT in Android image dtb area with idx %u\n", dtb_idx);
  457. } else if (!android_image_get_second(hdr, &fdt_data, &fdt_len) &&
  458. !fdt_check_header((char *)fdt_data)) {
  459. fdt_blob = (char *)fdt_data;
  460. if (fdt_totalsize(fdt_blob) != fdt_len)
  461. goto error;
  462. debug("## Using FDT in Android image second area\n");
  463. } else {
  464. fdt_addr = env_get_hex("fdtaddr", 0);
  465. if (!fdt_addr)
  466. goto no_fdt;
  467. fdt_blob = map_sysmem(fdt_addr, 0);
  468. if (fdt_check_header(fdt_blob))
  469. goto no_fdt;
  470. debug("## Using FDT at ${fdtaddr}=Ox%lx\n", fdt_addr);
  471. }
  472. #endif
  473. } else {
  474. debug("## No Flattened Device Tree\n");
  475. goto no_fdt;
  476. }
  477. *of_flat_tree = fdt_blob;
  478. *of_size = fdt_totalsize(fdt_blob);
  479. debug(" of_flat_tree at 0x%08lx size 0x%08lx\n",
  480. (ulong)*of_flat_tree, *of_size);
  481. return 0;
  482. no_fdt:
  483. debug("Continuing to boot without FDT\n");
  484. return 0;
  485. error:
  486. return 1;
  487. }
  488. /*
  489. * Verify the device tree.
  490. *
  491. * This function is called after all device tree fix-ups have been enacted,
  492. * so that the final device tree can be verified. The definition of "verified"
  493. * is up to the specific implementation. However, it generally means that the
  494. * addresses of some of the devices in the device tree are compared with the
  495. * actual addresses at which U-Boot has placed them.
  496. *
  497. * Returns 1 on success, 0 on failure. If 0 is returned, U-Boot will halt the
  498. * boot process.
  499. */
  500. __weak int ft_verify_fdt(void *fdt)
  501. {
  502. return 1;
  503. }
  504. __weak int arch_fixup_fdt(void *blob)
  505. {
  506. return 0;
  507. }
  508. int image_setup_libfdt(bootm_headers_t *images, void *blob,
  509. int of_size, struct lmb *lmb)
  510. {
  511. ulong *initrd_start = &images->initrd_start;
  512. ulong *initrd_end = &images->initrd_end;
  513. int ret = -EPERM;
  514. int fdt_ret;
  515. if (fdt_root(blob) < 0) {
  516. printf("ERROR: root node setup failed\n");
  517. goto err;
  518. }
  519. if (fdt_chosen(blob) < 0) {
  520. printf("ERROR: /chosen node create failed\n");
  521. goto err;
  522. }
  523. if (arch_fixup_fdt(blob) < 0) {
  524. printf("ERROR: arch-specific fdt fixup failed\n");
  525. goto err;
  526. }
  527. fdt_ret = optee_copy_fdt_nodes(blob);
  528. if (fdt_ret) {
  529. printf("ERROR: transfer of optee nodes to new fdt failed: %s\n",
  530. fdt_strerror(fdt_ret));
  531. goto err;
  532. }
  533. /* Update ethernet nodes */
  534. fdt_fixup_ethernet(blob);
  535. #if CONFIG_IS_ENABLED(CMD_PSTORE)
  536. /* Append PStore configuration */
  537. fdt_fixup_pstore(blob);
  538. #endif
  539. if (IS_ENABLED(CONFIG_OF_BOARD_SETUP)) {
  540. const char *skip_board_fixup;
  541. skip_board_fixup = env_get("skip_board_fixup");
  542. if (skip_board_fixup && ((int)simple_strtol(skip_board_fixup, NULL, 10) == 1)) {
  543. printf("skip board fdt fixup\n");
  544. } else {
  545. fdt_ret = ft_board_setup(blob, gd->bd);
  546. if (fdt_ret) {
  547. printf("ERROR: board-specific fdt fixup failed: %s\n",
  548. fdt_strerror(fdt_ret));
  549. goto err;
  550. }
  551. }
  552. }
  553. if (IS_ENABLED(CONFIG_OF_SYSTEM_SETUP)) {
  554. fdt_ret = ft_system_setup(blob, gd->bd);
  555. if (fdt_ret) {
  556. printf("ERROR: system-specific fdt fixup failed: %s\n",
  557. fdt_strerror(fdt_ret));
  558. goto err;
  559. }
  560. }
  561. /* Delete the old LMB reservation */
  562. if (lmb)
  563. lmb_free(lmb, (phys_addr_t)(u32)(uintptr_t)blob,
  564. (phys_size_t)fdt_totalsize(blob));
  565. ret = fdt_shrink_to_minimum(blob, 0);
  566. if (ret < 0)
  567. goto err;
  568. of_size = ret;
  569. if (*initrd_start && *initrd_end) {
  570. of_size += FDT_RAMDISK_OVERHEAD;
  571. fdt_set_totalsize(blob, of_size);
  572. }
  573. /* Create a new LMB reservation */
  574. if (lmb)
  575. lmb_reserve(lmb, (ulong)blob, of_size);
  576. fdt_initrd(blob, *initrd_start, *initrd_end);
  577. if (!ft_verify_fdt(blob))
  578. goto err;
  579. #if defined(CONFIG_ARCH_KEYSTONE)
  580. if (IS_ENABLED(CONFIG_OF_BOARD_SETUP))
  581. ft_board_setup_ex(blob, gd->bd);
  582. #endif
  583. return 0;
  584. err:
  585. printf(" - must RESET the board to recover.\n\n");
  586. return ret;
  587. }