image-fdt.c 13 KB

123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314315316317318319320321322323324325326327328329330331332333334335336337338339340341342343344345346347348349350351352353354355356357358359360361362363364365366367368369370371372373374375376377378379380381382383384385386387388389390391392393394395396397398399400401402403404405406407408409410411412413414415416417418419420421422423424425426427428429430431432433434435436437438439440441442443444445446447448449450451452453454455456457458459460461462463464465466467468469470471472473474475476477478479480481482483484485486487488489490491492493494495496497498499500501502503504505506507
  1. /*
  2. * Copyright (c) 2013, Google Inc.
  3. *
  4. * (C) Copyright 2008 Semihalf
  5. *
  6. * (C) Copyright 2000-2006
  7. * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
  8. *
  9. * See file CREDITS for list of people who contributed to this
  10. * project.
  11. *
  12. * This program is free software; you can redistribute it and/or
  13. * modify it under the terms of the GNU General Public License as
  14. * published by the Free Software Foundation; either version 2 of
  15. * the License, or (at your option) any later version.
  16. *
  17. * This program is distributed in the hope that it will be useful,
  18. * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19. * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  20. * GNU General Public License for more details.
  21. *
  22. * You should have received a copy of the GNU General Public License
  23. * along with this program; if not, write to the Free Software
  24. * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  25. * MA 02111-1307 USA
  26. */
  27. #include <common.h>
  28. #include <fdt_support.h>
  29. #include <errno.h>
  30. #include <image.h>
  31. #include <libfdt.h>
  32. #include <asm/io.h>
  33. #ifndef CONFIG_SYS_FDT_PAD
  34. #define CONFIG_SYS_FDT_PAD 0x3000
  35. #endif
  36. DECLARE_GLOBAL_DATA_PTR;
  37. static void fdt_error(const char *msg)
  38. {
  39. puts("ERROR: ");
  40. puts(msg);
  41. puts(" - must RESET the board to recover.\n");
  42. }
  43. static const image_header_t *image_get_fdt(ulong fdt_addr)
  44. {
  45. const image_header_t *fdt_hdr = map_sysmem(fdt_addr, 0);
  46. image_print_contents(fdt_hdr);
  47. puts(" Verifying Checksum ... ");
  48. if (!image_check_hcrc(fdt_hdr)) {
  49. fdt_error("fdt header checksum invalid");
  50. return NULL;
  51. }
  52. if (!image_check_dcrc(fdt_hdr)) {
  53. fdt_error("fdt checksum invalid");
  54. return NULL;
  55. }
  56. puts("OK\n");
  57. if (!image_check_type(fdt_hdr, IH_TYPE_FLATDT)) {
  58. fdt_error("uImage is not a fdt");
  59. return NULL;
  60. }
  61. if (image_get_comp(fdt_hdr) != IH_COMP_NONE) {
  62. fdt_error("uImage is compressed");
  63. return NULL;
  64. }
  65. if (fdt_check_header((char *)image_get_data(fdt_hdr)) != 0) {
  66. fdt_error("uImage data is not a fdt");
  67. return NULL;
  68. }
  69. return fdt_hdr;
  70. }
  71. /**
  72. * boot_fdt_add_mem_rsv_regions - Mark the memreserve sections as unusable
  73. * @lmb: pointer to lmb handle, will be used for memory mgmt
  74. * @fdt_blob: pointer to fdt blob base address
  75. *
  76. * Adds the memreserve regions in the dtb to the lmb block. Adding the
  77. * memreserve regions prevents u-boot from using them to store the initrd
  78. * or the fdt blob.
  79. */
  80. void boot_fdt_add_mem_rsv_regions(struct lmb *lmb, void *fdt_blob)
  81. {
  82. uint64_t addr, size;
  83. int i, total;
  84. if (fdt_check_header(fdt_blob) != 0)
  85. return;
  86. total = fdt_num_mem_rsv(fdt_blob);
  87. for (i = 0; i < total; i++) {
  88. if (fdt_get_mem_rsv(fdt_blob, i, &addr, &size) != 0)
  89. continue;
  90. printf(" reserving fdt memory region: addr=%llx size=%llx\n",
  91. (unsigned long long)addr, (unsigned long long)size);
  92. lmb_reserve(lmb, addr, size);
  93. }
  94. }
  95. /**
  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
  100. *
  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
  104. * bytes.
  105. *
  106. * of_flat_tree and of_size are set to final (after relocation) values
  107. *
  108. * returns:
  109. * 0 - success
  110. * 1 - failure
  111. */
  112. int boot_relocate_fdt(struct lmb *lmb, char **of_flat_tree, ulong *of_size)
  113. {
  114. void *fdt_blob = *of_flat_tree;
  115. void *of_start = NULL;
  116. char *fdt_high;
  117. ulong of_len = 0;
  118. int err;
  119. int disable_relocation = 0;
  120. /* nothing to do */
  121. if (*of_size == 0)
  122. return 0;
  123. if (fdt_check_header(fdt_blob) != 0) {
  124. fdt_error("image is not a fdt");
  125. goto error;
  126. }
  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;
  130. /* If fdt_high is set use it to select the relocation address */
  131. fdt_high = getenv("fdt_high");
  132. if (fdt_high) {
  133. void *desired_addr = (void *)simple_strtoul(fdt_high, NULL, 16);
  134. if (((ulong) desired_addr) == ~0UL) {
  135. /* All ones means use fdt in place */
  136. of_start = fdt_blob;
  137. lmb_reserve(lmb, (ulong)of_start, of_len);
  138. disable_relocation = 1;
  139. } else if (desired_addr) {
  140. of_start =
  141. (void *)(ulong) lmb_alloc_base(lmb, of_len, 0x1000,
  142. (ulong)desired_addr);
  143. if (of_start == NULL) {
  144. puts("Failed using fdt_high value for Device Tree");
  145. goto error;
  146. }
  147. } else {
  148. of_start =
  149. (void *)(ulong) lmb_alloc(lmb, of_len, 0x1000);
  150. }
  151. } else {
  152. of_start =
  153. (void *)(ulong) lmb_alloc_base(lmb, of_len, 0x1000,
  154. getenv_bootm_mapsize()
  155. + getenv_bootm_low());
  156. }
  157. if (of_start == NULL) {
  158. puts("device tree - allocation error\n");
  159. goto error;
  160. }
  161. if (disable_relocation) {
  162. /*
  163. * We assume there is space after the existing fdt to use
  164. * for padding
  165. */
  166. fdt_set_totalsize(of_start, of_len);
  167. printf(" Using Device Tree in place at %p, end %p\n",
  168. of_start, of_start + of_len - 1);
  169. } else {
  170. debug("## device tree at %p ... %p (len=%ld [0x%lX])\n",
  171. fdt_blob, fdt_blob + *of_size - 1, of_len, of_len);
  172. printf(" Loading Device Tree to %p, end %p ... ",
  173. of_start, of_start + of_len - 1);
  174. err = fdt_open_into(fdt_blob, of_start, of_len);
  175. if (err != 0) {
  176. fdt_error("fdt move failed");
  177. goto error;
  178. }
  179. puts("OK\n");
  180. }
  181. *of_flat_tree = of_start;
  182. *of_size = of_len;
  183. set_working_fdt_addr(*of_flat_tree);
  184. return 0;
  185. error:
  186. return 1;
  187. }
  188. /**
  189. * boot_get_fdt - main fdt handling routine
  190. * @argc: command argument count
  191. * @argv: command argument list
  192. * @arch: architecture (IH_ARCH_...)
  193. * @images: pointer to the bootm images structure
  194. * @of_flat_tree: pointer to a char* variable, will hold fdt start address
  195. * @of_size: pointer to a ulong variable, will hold fdt length
  196. *
  197. * boot_get_fdt() is responsible for finding a valid flat device tree image.
  198. * Curently supported are the following ramdisk sources:
  199. * - multicomponent kernel/ramdisk image,
  200. * - commandline provided address of decicated ramdisk image.
  201. *
  202. * returns:
  203. * 0, if fdt image was found and valid, or skipped
  204. * of_flat_tree and of_size are set to fdt start address and length if
  205. * fdt image is found and valid
  206. *
  207. * 1, if fdt image is found but corrupted
  208. * of_flat_tree and of_size are set to 0 if no fdt exists
  209. */
  210. int boot_get_fdt(int flag, int argc, char * const argv[], uint8_t arch,
  211. bootm_headers_t *images, char **of_flat_tree, ulong *of_size)
  212. {
  213. const image_header_t *fdt_hdr;
  214. ulong fdt_addr;
  215. char *fdt_blob = NULL;
  216. ulong image_start, image_data, image_end;
  217. ulong load, load_end;
  218. void *buf;
  219. #if defined(CONFIG_FIT)
  220. const char *fit_uname_config = images->fit_uname_cfg;
  221. const char *fit_uname_fdt = NULL;
  222. ulong default_addr;
  223. int fdt_noffset;
  224. #endif
  225. const char *select = NULL;
  226. *of_flat_tree = NULL;
  227. *of_size = 0;
  228. if (argc > 2)
  229. select = argv[2];
  230. if (select || genimg_has_config(images)) {
  231. #if defined(CONFIG_FIT)
  232. if (select) {
  233. /*
  234. * If the FDT blob comes from the FIT image and the
  235. * FIT image address is omitted in the command line
  236. * argument, try to use ramdisk or os FIT image
  237. * address or default load address.
  238. */
  239. if (images->fit_uname_rd)
  240. default_addr = (ulong)images->fit_hdr_rd;
  241. else if (images->fit_uname_os)
  242. default_addr = (ulong)images->fit_hdr_os;
  243. else
  244. default_addr = load_addr;
  245. if (fit_parse_conf(select, default_addr,
  246. &fdt_addr, &fit_uname_config)) {
  247. debug("* fdt: config '%s' from image at 0x%08lx\n",
  248. fit_uname_config, fdt_addr);
  249. } else if (fit_parse_subimage(select, default_addr,
  250. &fdt_addr, &fit_uname_fdt)) {
  251. debug("* fdt: subimage '%s' from image at 0x%08lx\n",
  252. fit_uname_fdt, fdt_addr);
  253. } else
  254. #endif
  255. {
  256. fdt_addr = simple_strtoul(select, NULL, 16);
  257. debug("* fdt: cmdline image address = 0x%08lx\n",
  258. fdt_addr);
  259. }
  260. #if defined(CONFIG_FIT)
  261. } else {
  262. /* use FIT configuration provided in first bootm
  263. * command argument
  264. */
  265. fdt_addr = map_to_sysmem(images->fit_hdr_os);
  266. fdt_noffset = fit_get_node_from_config(images,
  267. FIT_FDT_PROP,
  268. fdt_addr);
  269. if (fdt_noffset == -ENOLINK)
  270. return 0;
  271. else if (fdt_noffset < 0)
  272. return 1;
  273. }
  274. #endif
  275. debug("## Checking for 'FDT'/'FDT Image' at %08lx\n",
  276. fdt_addr);
  277. /* copy from dataflash if needed */
  278. fdt_addr = genimg_get_image(fdt_addr);
  279. /*
  280. * Check if there is an FDT image at the
  281. * address provided in the second bootm argument
  282. * check image type, for FIT images get a FIT node.
  283. */
  284. buf = map_sysmem(fdt_addr, 0);
  285. switch (genimg_get_format(buf)) {
  286. case IMAGE_FORMAT_LEGACY:
  287. /* verify fdt_addr points to a valid image header */
  288. printf("## Flattened Device Tree from Legacy Image at %08lx\n",
  289. fdt_addr);
  290. fdt_hdr = image_get_fdt(fdt_addr);
  291. if (!fdt_hdr)
  292. goto error;
  293. /*
  294. * move image data to the load address,
  295. * make sure we don't overwrite initial image
  296. */
  297. image_start = (ulong)fdt_hdr;
  298. image_data = (ulong)image_get_data(fdt_hdr);
  299. image_end = image_get_image_end(fdt_hdr);
  300. load = image_get_load(fdt_hdr);
  301. load_end = load + image_get_data_size(fdt_hdr);
  302. if (load == image_start ||
  303. load == image_data) {
  304. fdt_blob = (char *)image_data;
  305. break;
  306. }
  307. if ((load < image_end) && (load_end > image_start)) {
  308. fdt_error("fdt overwritten");
  309. goto error;
  310. }
  311. debug(" Loading FDT from 0x%08lx to 0x%08lx\n",
  312. image_data, load);
  313. memmove((void *)load,
  314. (void *)image_data,
  315. image_get_data_size(fdt_hdr));
  316. fdt_addr = load;
  317. break;
  318. case IMAGE_FORMAT_FIT:
  319. /*
  320. * This case will catch both: new uImage format
  321. * (libfdt based) and raw FDT blob (also libfdt
  322. * based).
  323. */
  324. #if defined(CONFIG_FIT)
  325. /* check FDT blob vs FIT blob */
  326. if (fit_check_format(buf)) {
  327. ulong load, len;
  328. fdt_noffset = fit_image_load(images,
  329. FIT_FDT_PROP,
  330. fdt_addr, &fit_uname_fdt,
  331. &fit_uname_config,
  332. arch, IH_TYPE_FLATDT,
  333. BOOTSTAGE_ID_FIT_FDT_START,
  334. FIT_LOAD_OPTIONAL, &load, &len);
  335. images->fit_hdr_fdt = map_sysmem(fdt_addr, 0);
  336. images->fit_uname_fdt = fit_uname_fdt;
  337. images->fit_noffset_fdt = fdt_noffset;
  338. fdt_addr = load;
  339. break;
  340. } else
  341. #endif
  342. {
  343. /*
  344. * FDT blob
  345. */
  346. debug("* fdt: raw FDT blob\n");
  347. printf("## Flattened Device Tree blob at %08lx\n",
  348. (long)fdt_addr);
  349. }
  350. break;
  351. default:
  352. puts("ERROR: Did not find a cmdline Flattened Device Tree\n");
  353. goto error;
  354. }
  355. printf(" Booting using the fdt blob at %#08lx\n", fdt_addr);
  356. fdt_blob = map_sysmem(fdt_addr, 0);
  357. } else if (images->legacy_hdr_valid &&
  358. image_check_type(&images->legacy_hdr_os_copy,
  359. IH_TYPE_MULTI)) {
  360. ulong fdt_data, fdt_len;
  361. /*
  362. * Now check if we have a legacy multi-component image,
  363. * get second entry data start address and len.
  364. */
  365. printf("## Flattened Device Tree from multi component Image at %08lX\n",
  366. (ulong)images->legacy_hdr_os);
  367. image_multi_getimg(images->legacy_hdr_os, 2, &fdt_data,
  368. &fdt_len);
  369. if (fdt_len) {
  370. fdt_blob = (char *)fdt_data;
  371. printf(" Booting using the fdt at 0x%p\n", fdt_blob);
  372. if (fdt_check_header(fdt_blob) != 0) {
  373. fdt_error("image is not a fdt");
  374. goto error;
  375. }
  376. if (fdt_totalsize(fdt_blob) != fdt_len) {
  377. fdt_error("fdt size != image size");
  378. goto error;
  379. }
  380. } else {
  381. debug("## No Flattened Device Tree\n");
  382. return 0;
  383. }
  384. } else {
  385. debug("## No Flattened Device Tree\n");
  386. return 0;
  387. }
  388. *of_flat_tree = fdt_blob;
  389. *of_size = fdt_totalsize(fdt_blob);
  390. debug(" of_flat_tree at 0x%08lx size 0x%08lx\n",
  391. (ulong)*of_flat_tree, *of_size);
  392. return 0;
  393. error:
  394. *of_flat_tree = NULL;
  395. *of_size = 0;
  396. return 1;
  397. }
  398. /*
  399. * Verify the device tree.
  400. *
  401. * This function is called after all device tree fix-ups have been enacted,
  402. * so that the final device tree can be verified. The definition of "verified"
  403. * is up to the specific implementation. However, it generally means that the
  404. * addresses of some of the devices in the device tree are compared with the
  405. * actual addresses at which U-Boot has placed them.
  406. *
  407. * Returns 1 on success, 0 on failure. If 0 is returned, U-boot will halt the
  408. * boot process.
  409. */
  410. __weak int ft_verify_fdt(void *fdt)
  411. {
  412. return 1;
  413. }
  414. __weak int arch_fixup_memory_node(void *blob)
  415. {
  416. return 0;
  417. }
  418. int image_setup_libfdt(bootm_headers_t *images, void *blob,
  419. int of_size, struct lmb *lmb)
  420. {
  421. ulong *initrd_start = &images->initrd_start;
  422. ulong *initrd_end = &images->initrd_end;
  423. int ret;
  424. if (fdt_chosen(blob, 1) < 0) {
  425. puts("ERROR: /chosen node create failed");
  426. puts(" - must RESET the board to recover.\n");
  427. return -1;
  428. }
  429. arch_fixup_memory_node(blob);
  430. if (IMAAGE_OF_BOARD_SETUP)
  431. ft_board_setup(blob, gd->bd);
  432. fdt_fixup_ethernet(blob);
  433. /* Delete the old LMB reservation */
  434. lmb_free(lmb, (phys_addr_t)(u32)(uintptr_t)blob,
  435. (phys_size_t)fdt_totalsize(blob));
  436. ret = fdt_resize(blob);
  437. if (ret < 0)
  438. return ret;
  439. of_size = ret;
  440. if (*initrd_start && *initrd_end) {
  441. of_size += FDT_RAMDISK_OVERHEAD;
  442. fdt_set_totalsize(blob, of_size);
  443. }
  444. /* Create a new LMB reservation */
  445. lmb_reserve(lmb, (ulong)blob, of_size);
  446. fdt_initrd(blob, *initrd_start, *initrd_end, 1);
  447. if (!ft_verify_fdt(blob))
  448. return -1;
  449. return 0;
  450. }