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 28 #include <common.h> 29 #include <fdt_support.h> 30 #include <errno.h> 31 #include <image.h> 32 #include <libfdt.h> 33 #include <asm/io.h> 34 35 #ifndef CONFIG_SYS_FDT_PAD 36 #define CONFIG_SYS_FDT_PAD 0x3000 37 #endif 38 39 DECLARE_GLOBAL_DATA_PTR; 40 41 static void fdt_error(const char *msg) 42 { 43 puts("ERROR: "); 44 puts(msg); 45 puts(" - must RESET the board to recover.\n"); 46 } 47 48 static const image_header_t *image_get_fdt(ulong fdt_addr) 49 { 50 const image_header_t *fdt_hdr = map_sysmem(fdt_addr, 0); 51 52 image_print_contents(fdt_hdr); 53 54 puts(" Verifying Checksum ... "); 55 if (!image_check_hcrc(fdt_hdr)) { 56 fdt_error("fdt header checksum invalid"); 57 return NULL; 58 } 59 60 if (!image_check_dcrc(fdt_hdr)) { 61 fdt_error("fdt checksum invalid"); 62 return NULL; 63 } 64 puts("OK\n"); 65 66 if (!image_check_type(fdt_hdr, IH_TYPE_FLATDT)) { 67 fdt_error("uImage is not a fdt"); 68 return NULL; 69 } 70 if (image_get_comp(fdt_hdr) != IH_COMP_NONE) { 71 fdt_error("uImage is compressed"); 72 return NULL; 73 } 74 if (fdt_check_header((char *)image_get_data(fdt_hdr)) != 0) { 75 fdt_error("uImage data is not a fdt"); 76 return NULL; 77 } 78 return fdt_hdr; 79 } 80 81 /** 82 * boot_fdt_add_mem_rsv_regions - Mark the memreserve sections as unusable 83 * @lmb: pointer to lmb handle, will be used for memory mgmt 84 * @fdt_blob: pointer to fdt blob base address 85 * 86 * Adds the memreserve regions in the dtb to the lmb block. Adding the 87 * memreserve regions prevents u-boot from using them to store the initrd 88 * or the fdt blob. 89 */ 90 void boot_fdt_add_mem_rsv_regions(struct lmb *lmb, void *fdt_blob) 91 { 92 uint64_t addr, size; 93 int i, total; 94 95 if (fdt_check_header(fdt_blob) != 0) 96 return; 97 98 total = fdt_num_mem_rsv(fdt_blob); 99 for (i = 0; i < total; i++) { 100 if (fdt_get_mem_rsv(fdt_blob, i, &addr, &size) != 0) 101 continue; 102 printf(" reserving fdt memory region: addr=%llx size=%llx\n", 103 (unsigned long long)addr, (unsigned long long)size); 104 lmb_reserve(lmb, addr, size); 105 } 106 } 107 108 /** 109 * boot_relocate_fdt - relocate flat device tree 110 * @lmb: pointer to lmb handle, will be used for memory mgmt 111 * @of_flat_tree: pointer to a char* variable, will hold fdt start address 112 * @of_size: pointer to a ulong variable, will hold fdt length 113 * 114 * boot_relocate_fdt() allocates a region of memory within the bootmap and 115 * relocates the of_flat_tree into that region, even if the fdt is already in 116 * the bootmap. It also expands the size of the fdt by CONFIG_SYS_FDT_PAD 117 * bytes. 118 * 119 * of_flat_tree and of_size are set to final (after relocation) values 120 * 121 * returns: 122 * 0 - success 123 * 1 - failure 124 */ 125 int boot_relocate_fdt(struct lmb *lmb, char **of_flat_tree, ulong *of_size) 126 { 127 void *fdt_blob = *of_flat_tree; 128 void *of_start = NULL; 129 char *fdt_high; 130 ulong of_len = 0; 131 int err; 132 int disable_relocation = 0; 133 134 /* nothing to do */ 135 if (*of_size == 0) 136 return 0; 137 138 if (fdt_check_header(fdt_blob) != 0) { 139 fdt_error("image is not a fdt"); 140 goto error; 141 } 142 143 /* position on a 4K boundary before the alloc_current */ 144 /* Pad the FDT by a specified amount */ 145 of_len = *of_size + CONFIG_SYS_FDT_PAD; 146 147 /* If fdt_high is set use it to select the relocation address */ 148 fdt_high = getenv("fdt_high"); 149 if (fdt_high) { 150 void *desired_addr = (void *)simple_strtoul(fdt_high, NULL, 16); 151 152 if (((ulong) desired_addr) == ~0UL) { 153 /* All ones means use fdt in place */ 154 of_start = fdt_blob; 155 lmb_reserve(lmb, (ulong)of_start, of_len); 156 disable_relocation = 1; 157 } else if (desired_addr) { 158 of_start = 159 (void *)(ulong) lmb_alloc_base(lmb, of_len, 0x1000, 160 (ulong)desired_addr); 161 if (of_start == NULL) { 162 puts("Failed using fdt_high value for Device Tree"); 163 goto error; 164 } 165 } else { 166 of_start = 167 (void *)(ulong) lmb_alloc(lmb, of_len, 0x1000); 168 } 169 } else { 170 of_start = 171 (void *)(ulong) lmb_alloc_base(lmb, of_len, 0x1000, 172 getenv_bootm_mapsize() 173 + getenv_bootm_low()); 174 } 175 176 if (of_start == NULL) { 177 puts("device tree - allocation error\n"); 178 goto error; 179 } 180 181 if (disable_relocation) { 182 /* 183 * We assume there is space after the existing fdt to use 184 * for padding 185 */ 186 fdt_set_totalsize(of_start, of_len); 187 printf(" Using Device Tree in place at %p, end %p\n", 188 of_start, of_start + of_len - 1); 189 } else { 190 debug("## device tree at %p ... %p (len=%ld [0x%lX])\n", 191 fdt_blob, fdt_blob + *of_size - 1, of_len, of_len); 192 193 printf(" Loading Device Tree to %p, end %p ... ", 194 of_start, of_start + of_len - 1); 195 196 err = fdt_open_into(fdt_blob, of_start, of_len); 197 if (err != 0) { 198 fdt_error("fdt move failed"); 199 goto error; 200 } 201 puts("OK\n"); 202 } 203 204 *of_flat_tree = of_start; 205 *of_size = of_len; 206 207 set_working_fdt_addr(*of_flat_tree); 208 return 0; 209 210 error: 211 return 1; 212 } 213 214 /** 215 * boot_get_fdt - main fdt handling routine 216 * @argc: command argument count 217 * @argv: command argument list 218 * @arch: architecture (IH_ARCH_...) 219 * @images: pointer to the bootm images structure 220 * @of_flat_tree: pointer to a char* variable, will hold fdt start address 221 * @of_size: pointer to a ulong variable, will hold fdt length 222 * 223 * boot_get_fdt() is responsible for finding a valid flat device tree image. 224 * Curently supported are the following ramdisk sources: 225 * - multicomponent kernel/ramdisk image, 226 * - commandline provided address of decicated ramdisk image. 227 * 228 * returns: 229 * 0, if fdt image was found and valid, or skipped 230 * of_flat_tree and of_size are set to fdt start address and length if 231 * fdt image is found and valid 232 * 233 * 1, if fdt image is found but corrupted 234 * of_flat_tree and of_size are set to 0 if no fdt exists 235 */ 236 int boot_get_fdt(int flag, int argc, char * const argv[], uint8_t arch, 237 bootm_headers_t *images, char **of_flat_tree, ulong *of_size) 238 { 239 const image_header_t *fdt_hdr; 240 ulong fdt_addr; 241 char *fdt_blob = NULL; 242 ulong image_start, image_data, image_end; 243 ulong load, load_end; 244 void *buf; 245 #if defined(CONFIG_FIT) 246 const char *fit_uname_config = NULL; 247 const char *fit_uname_fdt = NULL; 248 ulong default_addr; 249 int fdt_noffset; 250 #endif 251 252 *of_flat_tree = NULL; 253 *of_size = 0; 254 255 if (argc > 3 || genimg_has_config(images)) { 256 #if defined(CONFIG_FIT) 257 if (argc > 3) { 258 /* 259 * If the FDT blob comes from the FIT image and the 260 * FIT image address is omitted in the command line 261 * argument, try to use ramdisk or os FIT image 262 * address or default load address. 263 */ 264 if (images->fit_uname_rd) 265 default_addr = (ulong)images->fit_hdr_rd; 266 else if (images->fit_uname_os) 267 default_addr = (ulong)images->fit_hdr_os; 268 else 269 default_addr = load_addr; 270 271 if (fit_parse_conf(argv[3], default_addr, 272 &fdt_addr, &fit_uname_config)) { 273 debug("* fdt: config '%s' from image at 0x%08lx\n", 274 fit_uname_config, fdt_addr); 275 } else if (fit_parse_subimage(argv[3], default_addr, 276 &fdt_addr, &fit_uname_fdt)) { 277 debug("* fdt: subimage '%s' from image at 0x%08lx\n", 278 fit_uname_fdt, fdt_addr); 279 } else 280 #endif 281 { 282 fdt_addr = simple_strtoul(argv[3], NULL, 16); 283 debug("* fdt: cmdline image address = 0x%08lx\n", 284 fdt_addr); 285 } 286 #if defined(CONFIG_FIT) 287 } else { 288 /* use FIT configuration provided in first bootm 289 * command argument 290 */ 291 fdt_addr = map_to_sysmem(images->fit_hdr_os); 292 fdt_noffset = fit_get_node_from_config(images, 293 FIT_FDT_PROP, 294 fdt_addr); 295 if (fdt_noffset == -ENOLINK) 296 return 0; 297 else if (fdt_noffset < 0) 298 return 1; 299 } 300 #endif 301 debug("## Checking for 'FDT'/'FDT Image' at %08lx\n", 302 fdt_addr); 303 304 /* copy from dataflash if needed */ 305 fdt_addr = genimg_get_image(fdt_addr); 306 307 /* 308 * Check if there is an FDT image at the 309 * address provided in the second bootm argument 310 * check image type, for FIT images get a FIT node. 311 */ 312 buf = map_sysmem(fdt_addr, 0); 313 switch (genimg_get_format(buf)) { 314 case IMAGE_FORMAT_LEGACY: 315 /* verify fdt_addr points to a valid image header */ 316 printf("## Flattened Device Tree from Legacy Image at %08lx\n", 317 fdt_addr); 318 fdt_hdr = image_get_fdt(fdt_addr); 319 if (!fdt_hdr) 320 goto error; 321 322 /* 323 * move image data to the load address, 324 * make sure we don't overwrite initial image 325 */ 326 image_start = (ulong)fdt_hdr; 327 image_data = (ulong)image_get_data(fdt_hdr); 328 image_end = image_get_image_end(fdt_hdr); 329 330 load = image_get_load(fdt_hdr); 331 load_end = load + image_get_data_size(fdt_hdr); 332 333 if (load == image_start || 334 load == image_data) { 335 fdt_blob = (char *)image_data; 336 break; 337 } 338 339 if ((load < image_end) && (load_end > image_start)) { 340 fdt_error("fdt overwritten"); 341 goto error; 342 } 343 344 debug(" Loading FDT from 0x%08lx to 0x%08lx\n", 345 image_data, load); 346 347 memmove((void *)load, 348 (void *)image_data, 349 image_get_data_size(fdt_hdr)); 350 351 fdt_addr = load; 352 break; 353 case IMAGE_FORMAT_FIT: 354 /* 355 * This case will catch both: new uImage format 356 * (libfdt based) and raw FDT blob (also libfdt 357 * based). 358 */ 359 #if defined(CONFIG_FIT) 360 /* check FDT blob vs FIT blob */ 361 if (fit_check_format(buf)) { 362 ulong load, len; 363 364 fdt_noffset = fit_image_load(images, 365 FIT_FDT_PROP, 366 fdt_addr, &fit_uname_fdt, 367 fit_uname_config, 368 arch, IH_TYPE_FLATDT, 369 BOOTSTAGE_ID_FIT_FDT_START, 370 FIT_LOAD_OPTIONAL, &load, &len); 371 372 images->fit_hdr_fdt = map_sysmem(fdt_addr, 0); 373 images->fit_uname_fdt = fit_uname_fdt; 374 images->fit_noffset_fdt = fdt_noffset; 375 fdt_addr = load; 376 break; 377 } else 378 #endif 379 { 380 /* 381 * FDT blob 382 */ 383 debug("* fdt: raw FDT blob\n"); 384 printf("## Flattened Device Tree blob at %08lx\n", 385 (long)fdt_addr); 386 } 387 break; 388 default: 389 puts("ERROR: Did not find a cmdline Flattened Device Tree\n"); 390 goto error; 391 } 392 393 printf(" Booting using the fdt blob at %#08lx\n", fdt_addr); 394 fdt_blob = map_sysmem(fdt_addr, 0); 395 } else if (images->legacy_hdr_valid && 396 image_check_type(&images->legacy_hdr_os_copy, 397 IH_TYPE_MULTI)) { 398 ulong fdt_data, fdt_len; 399 400 /* 401 * Now check if we have a legacy multi-component image, 402 * get second entry data start address and len. 403 */ 404 printf("## Flattened Device Tree from multi component Image at %08lX\n", 405 (ulong)images->legacy_hdr_os); 406 407 image_multi_getimg(images->legacy_hdr_os, 2, &fdt_data, 408 &fdt_len); 409 if (fdt_len) { 410 fdt_blob = (char *)fdt_data; 411 printf(" Booting using the fdt at 0x%p\n", fdt_blob); 412 413 if (fdt_check_header(fdt_blob) != 0) { 414 fdt_error("image is not a fdt"); 415 goto error; 416 } 417 418 if (fdt_totalsize(fdt_blob) != fdt_len) { 419 fdt_error("fdt size != image size"); 420 goto error; 421 } 422 } else { 423 debug("## No Flattened Device Tree\n"); 424 return 0; 425 } 426 } else { 427 debug("## No Flattened Device Tree\n"); 428 return 0; 429 } 430 431 *of_flat_tree = fdt_blob; 432 *of_size = fdt_totalsize(fdt_blob); 433 debug(" of_flat_tree at 0x%08lx size 0x%08lx\n", 434 (ulong)*of_flat_tree, *of_size); 435 436 return 0; 437 438 error: 439 *of_flat_tree = NULL; 440 *of_size = 0; 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_memory_node(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; 472 473 if (fdt_chosen(blob, 1) < 0) { 474 puts("ERROR: /chosen node create failed"); 475 puts(" - must RESET the board to recover.\n"); 476 return -1; 477 } 478 arch_fixup_memory_node(blob); 479 if (IMAAGE_OF_BOARD_SETUP) 480 ft_board_setup(blob, gd->bd); 481 fdt_fixup_ethernet(blob); 482 483 /* Delete the old LMB reservation */ 484 lmb_free(lmb, (phys_addr_t)(u32)(uintptr_t)blob, 485 (phys_size_t)fdt_totalsize(blob)); 486 487 ret = fdt_resize(blob); 488 if (ret < 0) 489 return ret; 490 of_size = ret; 491 492 if (*initrd_start && *initrd_end) { 493 of_size += FDT_RAMDISK_OVERHEAD; 494 fdt_set_totalsize(blob, of_size); 495 } 496 /* Create a new LMB reservation */ 497 lmb_reserve(lmb, (ulong)blob, of_size); 498 499 fdt_initrd(blob, *initrd_start, *initrd_end, 1); 500 if (!ft_verify_fdt(blob)) 501 return -1; 502 503 return 0; 504 } 505