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 <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 DECLARE_GLOBAL_DATA_PTR; 25 26 static void fdt_error(const char *msg) 27 { 28 puts("ERROR: "); 29 puts(msg); 30 puts(" - must RESET the board to recover.\n"); 31 } 32 33 #if defined(CONFIG_IMAGE_FORMAT_LEGACY) 34 static const image_header_t *image_get_fdt(ulong fdt_addr) 35 { 36 const image_header_t *fdt_hdr = map_sysmem(fdt_addr, 0); 37 38 image_print_contents(fdt_hdr); 39 40 puts(" Verifying Checksum ... "); 41 if (!image_check_hcrc(fdt_hdr)) { 42 fdt_error("fdt header checksum invalid"); 43 return NULL; 44 } 45 46 if (!image_check_dcrc(fdt_hdr)) { 47 fdt_error("fdt checksum invalid"); 48 return NULL; 49 } 50 puts("OK\n"); 51 52 if (!image_check_type(fdt_hdr, IH_TYPE_FLATDT)) { 53 fdt_error("uImage is not a fdt"); 54 return NULL; 55 } 56 if (image_get_comp(fdt_hdr) != IH_COMP_NONE) { 57 fdt_error("uImage is compressed"); 58 return NULL; 59 } 60 if (fdt_check_header((void *)image_get_data(fdt_hdr)) != 0) { 61 fdt_error("uImage data is not a fdt"); 62 return NULL; 63 } 64 return fdt_hdr; 65 } 66 #endif 67 68 /** 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 72 * 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 75 * or the fdt blob. 76 */ 77 void boot_fdt_add_mem_rsv_regions(struct lmb *lmb, void *fdt_blob) 78 { 79 uint64_t addr, size; 80 int i, total; 81 82 if (fdt_check_header(fdt_blob) != 0) 83 return; 84 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) 88 continue; 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); 92 } 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; 120 121 /* nothing to do */ 122 if (*of_size == 0) 123 return 0; 124 125 if (fdt_check_header(fdt_blob) != 0) { 126 fdt_error("image is not a fdt"); 127 goto error; 128 } 129 130 /* 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; 133 134 /* If fdt_high is set use it to select the relocation address */ 135 fdt_high = getenv("fdt_high"); 136 if (fdt_high) { 137 void *desired_addr = (void *)simple_strtoul(fdt_high, NULL, 16); 138 139 if (((ulong) desired_addr) == ~0UL) { 140 /* All ones means use fdt in place */ 141 of_start = fdt_blob; 142 lmb_reserve(lmb, (ulong)of_start, of_len); 143 disable_relocation = 1; 144 } else if (desired_addr) { 145 of_start = 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"); 150 goto error; 151 } 152 } else { 153 of_start = 154 (void *)(ulong) lmb_alloc(lmb, of_len, 0x1000); 155 } 156 } else { 157 of_start = 158 (void *)(ulong) lmb_alloc_base(lmb, of_len, 0x1000, 159 getenv_bootm_mapsize() 160 + getenv_bootm_low()); 161 } 162 163 if (of_start == NULL) { 164 puts("device tree - allocation error\n"); 165 goto error; 166 } 167 168 if (disable_relocation) { 169 /* 170 * We assume there is space after the existing fdt to use 171 * for padding 172 */ 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); 176 } else { 177 debug("## device tree at %p ... %p (len=%ld [0x%lX])\n", 178 fdt_blob, fdt_blob + *of_size - 1, of_len, of_len); 179 180 printf(" Loading Device Tree to %p, end %p ... ", 181 of_start, of_start + of_len - 1); 182 183 err = fdt_open_into(fdt_blob, of_start, of_len); 184 if (err != 0) { 185 fdt_error("fdt move failed"); 186 goto error; 187 } 188 puts("OK\n"); 189 } 190 191 *of_flat_tree = of_start; 192 *of_size = of_len; 193 194 set_working_fdt_addr((ulong)*of_flat_tree); 195 return 0; 196 197 error: 198 return 1; 199 } 200 201 /** 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 209 * 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. 214 * 215 * returns: 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 219 * 220 * 1, if fdt image is found but corrupted 221 * of_flat_tree and of_size are set to 0 if no fdt exists 222 */ 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) 225 { 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; 230 #endif 231 ulong fdt_addr; 232 char *fdt_blob = NULL; 233 void *buf; 234 #if defined(CONFIG_FIT) 235 const char *fit_uname_config = images->fit_uname_cfg; 236 const char *fit_uname_fdt = NULL; 237 ulong default_addr; 238 int fdt_noffset; 239 #endif 240 const char *select = NULL; 241 int ok_no_fdt = 0; 242 243 *of_flat_tree = NULL; 244 *of_size = 0; 245 246 if (argc > 2) 247 select = argv[2]; 248 if (select || genimg_has_config(images)) { 249 #if defined(CONFIG_FIT) 250 if (select) { 251 /* 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. 256 */ 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; 261 else 262 default_addr = load_addr; 263 264 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); 272 } else 273 #endif 274 { 275 fdt_addr = simple_strtoul(select, NULL, 16); 276 debug("* fdt: cmdline image address = 0x%08lx\n", 277 fdt_addr); 278 } 279 #if defined(CONFIG_FIT) 280 } else { 281 /* use FIT configuration provided in first bootm 282 * command argument 283 */ 284 fdt_addr = map_to_sysmem(images->fit_hdr_os); 285 fdt_noffset = fit_get_node_from_config(images, 286 FIT_FDT_PROP, 287 fdt_addr); 288 if (fdt_noffset == -ENOLINK) 289 return 0; 290 else if (fdt_noffset < 0) 291 return 1; 292 } 293 #endif 294 debug("## Checking for 'FDT'/'FDT Image' at %08lx\n", 295 fdt_addr); 296 297 /* copy from dataflash if needed */ 298 fdt_addr = genimg_get_image(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_blob = (char *)image_data; 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 defined(CONFIG_FIT) 355 /* check FDT blob vs FIT blob */ 356 if (fit_check_format(buf)) { 357 ulong load, len; 358 359 fdt_noffset = fit_image_load(images, 360 fdt_addr, &fit_uname_fdt, 361 &fit_uname_config, 362 arch, IH_TYPE_FLATDT, 363 BOOTSTAGE_ID_FIT_FDT_START, 364 FIT_LOAD_OPTIONAL, &load, &len); 365 366 images->fit_hdr_fdt = map_sysmem(fdt_addr, 0); 367 images->fit_uname_fdt = fit_uname_fdt; 368 images->fit_noffset_fdt = fdt_noffset; 369 fdt_addr = load; 370 break; 371 } else 372 #endif 373 { 374 /* 375 * FDT blob 376 */ 377 debug("* fdt: raw FDT blob\n"); 378 printf("## Flattened Device Tree blob at %08lx\n", 379 (long)fdt_addr); 380 } 381 break; 382 default: 383 puts("ERROR: Did not find a cmdline Flattened Device Tree\n"); 384 goto no_fdt; 385 } 386 387 printf(" Booting using the fdt blob at %#08lx\n", fdt_addr); 388 fdt_blob = map_sysmem(fdt_addr, 0); 389 } else if (images->legacy_hdr_valid && 390 image_check_type(&images->legacy_hdr_os_copy, 391 IH_TYPE_MULTI)) { 392 ulong fdt_data, fdt_len; 393 394 /* 395 * Now check if we have a legacy multi-component image, 396 * get second entry data start address and len. 397 */ 398 printf("## Flattened Device Tree from multi component Image at %08lX\n", 399 (ulong)images->legacy_hdr_os); 400 401 image_multi_getimg(images->legacy_hdr_os, 2, &fdt_data, 402 &fdt_len); 403 if (fdt_len) { 404 fdt_blob = (char *)fdt_data; 405 printf(" Booting using the fdt at 0x%p\n", fdt_blob); 406 407 if (fdt_check_header(fdt_blob) != 0) { 408 fdt_error("image is not a fdt"); 409 goto error; 410 } 411 412 if (fdt_totalsize(fdt_blob) != fdt_len) { 413 fdt_error("fdt size != image size"); 414 goto error; 415 } 416 } else { 417 debug("## No Flattened Device Tree\n"); 418 goto no_fdt; 419 } 420 } else { 421 debug("## No Flattened Device Tree\n"); 422 goto no_fdt; 423 } 424 425 *of_flat_tree = fdt_blob; 426 *of_size = fdt_totalsize(fdt_blob); 427 debug(" of_flat_tree at 0x%08lx size 0x%08lx\n", 428 (ulong)*of_flat_tree, *of_size); 429 430 return 0; 431 432 no_fdt: 433 ok_no_fdt = 1; 434 error: 435 *of_flat_tree = NULL; 436 *of_size = 0; 437 if (!select && ok_no_fdt) { 438 debug("Continuing to boot without FDT\n"); 439 return 0; 440 } 441 return 1; 442 } 443 444 /* 445 * Verify the device tree. 446 * 447 * This function is called after all device tree fix-ups have been enacted, 448 * so that the final device tree can be verified. The definition of "verified" 449 * is up to the specific implementation. However, it generally means that the 450 * addresses of some of the devices in the device tree are compared with the 451 * actual addresses at which U-Boot has placed them. 452 * 453 * Returns 1 on success, 0 on failure. If 0 is returned, U-boot will halt the 454 * boot process. 455 */ 456 __weak int ft_verify_fdt(void *fdt) 457 { 458 return 1; 459 } 460 461 __weak int arch_fixup_fdt(void *blob) 462 { 463 return 0; 464 } 465 466 int image_setup_libfdt(bootm_headers_t *images, void *blob, 467 int of_size, struct lmb *lmb) 468 { 469 ulong *initrd_start = &images->initrd_start; 470 ulong *initrd_end = &images->initrd_end; 471 int ret = -EPERM; 472 int fdt_ret; 473 474 if (fdt_chosen(blob) < 0) { 475 printf("ERROR: /chosen node create failed\n"); 476 goto err; 477 } 478 if (arch_fixup_fdt(blob) < 0) { 479 printf("ERROR: arch-specific fdt fixup failed\n"); 480 goto err; 481 } 482 if (IMAGE_OF_BOARD_SETUP) { 483 fdt_ret = ft_board_setup(blob, gd->bd); 484 if (fdt_ret) { 485 printf("ERROR: board-specific fdt fixup failed: %s\n", 486 fdt_strerror(fdt_ret)); 487 goto err; 488 } 489 } 490 if (IMAGE_OF_SYSTEM_SETUP) { 491 if (ft_system_setup(blob, gd->bd)) { 492 printf("ERROR: system-specific fdt fixup failed: %s\n", 493 fdt_strerror(fdt_ret)); 494 goto err; 495 } 496 } 497 fdt_fixup_ethernet(blob); 498 499 /* Delete the old LMB reservation */ 500 lmb_free(lmb, (phys_addr_t)(u32)(uintptr_t)blob, 501 (phys_size_t)fdt_totalsize(blob)); 502 503 ret = fdt_shrink_to_minimum(blob); 504 if (ret < 0) 505 goto err; 506 of_size = ret; 507 508 if (*initrd_start && *initrd_end) { 509 of_size += FDT_RAMDISK_OVERHEAD; 510 fdt_set_totalsize(blob, of_size); 511 } 512 /* Create a new LMB reservation */ 513 lmb_reserve(lmb, (ulong)blob, of_size); 514 515 fdt_initrd(blob, *initrd_start, *initrd_end); 516 if (!ft_verify_fdt(blob)) 517 goto err; 518 519 #if defined(CONFIG_SOC_KEYSTONE) 520 if (IMAGE_OF_BOARD_SETUP) 521 ft_board_setup_ex(blob, gd->bd); 522 #endif 523 524 return 0; 525 err: 526 printf(" - must RESET the board to recover.\n\n"); 527 528 return ret; 529 } 530