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