1 /* 2 * Copyright (C) 2008 RuggedCom, Inc. 3 * Richard Retanubun <RichardRetanubun@RuggedCom.com> 4 * 5 * SPDX-License-Identifier: GPL-2.0+ 6 */ 7 8 /* 9 * NOTE: 10 * when CONFIG_SYS_64BIT_LBA is not defined, lbaint_t is 32 bits; this 11 * limits the maximum size of addressable storage to < 2 Terra Bytes 12 */ 13 #include <asm/unaligned.h> 14 #include <common.h> 15 #include <command.h> 16 #include <fdtdec.h> 17 #include <ide.h> 18 #include <inttypes.h> 19 #include <malloc.h> 20 #include <memalign.h> 21 #include <part_efi.h> 22 #include <linux/compiler.h> 23 #include <linux/ctype.h> 24 25 DECLARE_GLOBAL_DATA_PTR; 26 27 #ifdef HAVE_BLOCK_DEVICE 28 /** 29 * efi_crc32() - EFI version of crc32 function 30 * @buf: buffer to calculate crc32 of 31 * @len - length of buf 32 * 33 * Description: Returns EFI-style CRC32 value for @buf 34 */ 35 static inline u32 efi_crc32(const void *buf, u32 len) 36 { 37 return crc32(0, buf, len); 38 } 39 40 /* 41 * Private function prototypes 42 */ 43 44 static int pmbr_part_valid(struct partition *part); 45 static int is_pmbr_valid(legacy_mbr * mbr); 46 static int is_gpt_valid(struct blk_desc *dev_desc, u64 lba, 47 gpt_header *pgpt_head, gpt_entry **pgpt_pte); 48 static gpt_entry *alloc_read_gpt_entries(struct blk_desc *dev_desc, 49 gpt_header *pgpt_head); 50 static int is_pte_valid(gpt_entry * pte); 51 52 static char *print_efiname(gpt_entry *pte) 53 { 54 static char name[PARTNAME_SZ + 1]; 55 int i; 56 for (i = 0; i < PARTNAME_SZ; i++) { 57 u8 c; 58 c = pte->partition_name[i] & 0xff; 59 c = (c && !isprint(c)) ? '.' : c; 60 name[i] = c; 61 } 62 name[PARTNAME_SZ] = 0; 63 return name; 64 } 65 66 static efi_guid_t system_guid = PARTITION_SYSTEM_GUID; 67 68 static inline int is_bootable(gpt_entry *p) 69 { 70 return p->attributes.fields.legacy_bios_bootable || 71 !memcmp(&(p->partition_type_guid), &system_guid, 72 sizeof(efi_guid_t)); 73 } 74 75 static int validate_gpt_header(gpt_header *gpt_h, lbaint_t lba, 76 lbaint_t lastlba) 77 { 78 uint32_t crc32_backup = 0; 79 uint32_t calc_crc32; 80 81 /* Check the GPT header signature */ 82 if (le64_to_cpu(gpt_h->signature) != GPT_HEADER_SIGNATURE) { 83 printf("%s signature is wrong: 0x%llX != 0x%llX\n", 84 "GUID Partition Table Header", 85 le64_to_cpu(gpt_h->signature), 86 GPT_HEADER_SIGNATURE); 87 return -1; 88 } 89 90 /* Check the GUID Partition Table CRC */ 91 memcpy(&crc32_backup, &gpt_h->header_crc32, sizeof(crc32_backup)); 92 memset(&gpt_h->header_crc32, 0, sizeof(gpt_h->header_crc32)); 93 94 calc_crc32 = efi_crc32((const unsigned char *)gpt_h, 95 le32_to_cpu(gpt_h->header_size)); 96 97 memcpy(&gpt_h->header_crc32, &crc32_backup, sizeof(crc32_backup)); 98 99 if (calc_crc32 != le32_to_cpu(crc32_backup)) { 100 printf("%s CRC is wrong: 0x%x != 0x%x\n", 101 "GUID Partition Table Header", 102 le32_to_cpu(crc32_backup), calc_crc32); 103 return -1; 104 } 105 106 /* 107 * Check that the my_lba entry points to the LBA that contains the GPT 108 */ 109 if (le64_to_cpu(gpt_h->my_lba) != lba) { 110 printf("GPT: my_lba incorrect: %llX != " LBAF "\n", 111 le64_to_cpu(gpt_h->my_lba), 112 lba); 113 return -1; 114 } 115 116 /* 117 * Check that the first_usable_lba and that the last_usable_lba are 118 * within the disk. 119 */ 120 if (le64_to_cpu(gpt_h->first_usable_lba) > lastlba) { 121 printf("GPT: first_usable_lba incorrect: %llX > " LBAF "\n", 122 le64_to_cpu(gpt_h->first_usable_lba), lastlba); 123 return -1; 124 } 125 if (le64_to_cpu(gpt_h->last_usable_lba) > lastlba) { 126 printf("GPT: last_usable_lba incorrect: %llX > " LBAF "\n", 127 le64_to_cpu(gpt_h->last_usable_lba), lastlba); 128 return -1; 129 } 130 131 debug("GPT: first_usable_lba: %llX last_usable_lba: %llX last lba: " 132 LBAF "\n", le64_to_cpu(gpt_h->first_usable_lba), 133 le64_to_cpu(gpt_h->last_usable_lba), lastlba); 134 135 return 0; 136 } 137 138 static int validate_gpt_entries(gpt_header *gpt_h, gpt_entry *gpt_e) 139 { 140 uint32_t calc_crc32; 141 142 /* Check the GUID Partition Table Entry Array CRC */ 143 calc_crc32 = efi_crc32((const unsigned char *)gpt_e, 144 le32_to_cpu(gpt_h->num_partition_entries) * 145 le32_to_cpu(gpt_h->sizeof_partition_entry)); 146 147 if (calc_crc32 != le32_to_cpu(gpt_h->partition_entry_array_crc32)) { 148 printf("%s: 0x%x != 0x%x\n", 149 "GUID Partition Table Entry Array CRC is wrong", 150 le32_to_cpu(gpt_h->partition_entry_array_crc32), 151 calc_crc32); 152 return -1; 153 } 154 155 return 0; 156 } 157 158 static void prepare_backup_gpt_header(gpt_header *gpt_h) 159 { 160 uint32_t calc_crc32; 161 uint64_t val; 162 163 /* recalculate the values for the Backup GPT Header */ 164 val = le64_to_cpu(gpt_h->my_lba); 165 gpt_h->my_lba = gpt_h->alternate_lba; 166 gpt_h->alternate_lba = cpu_to_le64(val); 167 gpt_h->partition_entry_lba = 168 cpu_to_le64(le64_to_cpu(gpt_h->last_usable_lba) + 1); 169 gpt_h->header_crc32 = 0; 170 171 calc_crc32 = efi_crc32((const unsigned char *)gpt_h, 172 le32_to_cpu(gpt_h->header_size)); 173 gpt_h->header_crc32 = cpu_to_le32(calc_crc32); 174 } 175 176 #if CONFIG_IS_ENABLED(EFI_PARTITION) 177 /* 178 * Public Functions (include/part.h) 179 */ 180 181 /* 182 * UUID is displayed as 32 hexadecimal digits, in 5 groups, 183 * separated by hyphens, in the form 8-4-4-4-12 for a total of 36 characters 184 */ 185 int get_disk_guid(struct blk_desc * dev_desc, char *guid) 186 { 187 ALLOC_CACHE_ALIGN_BUFFER_PAD(gpt_header, gpt_head, 1, dev_desc->blksz); 188 gpt_entry *gpt_pte = NULL; 189 unsigned char *guid_bin; 190 191 /* This function validates AND fills in the GPT header and PTE */ 192 if (is_gpt_valid(dev_desc, GPT_PRIMARY_PARTITION_TABLE_LBA, 193 gpt_head, &gpt_pte) != 1) { 194 printf("%s: *** ERROR: Invalid GPT ***\n", __func__); 195 if (is_gpt_valid(dev_desc, dev_desc->lba - 1, 196 gpt_head, &gpt_pte) != 1) { 197 printf("%s: *** ERROR: Invalid Backup GPT ***\n", 198 __func__); 199 return -EINVAL; 200 } else { 201 printf("%s: *** Using Backup GPT ***\n", 202 __func__); 203 } 204 } 205 206 guid_bin = gpt_head->disk_guid.b; 207 uuid_bin_to_str(guid_bin, guid, UUID_STR_FORMAT_GUID); 208 209 return 0; 210 } 211 212 void part_print_efi(struct blk_desc *dev_desc) 213 { 214 ALLOC_CACHE_ALIGN_BUFFER_PAD(gpt_header, gpt_head, 1, dev_desc->blksz); 215 gpt_entry *gpt_pte = NULL; 216 int i = 0; 217 char uuid[UUID_STR_LEN + 1]; 218 unsigned char *uuid_bin; 219 220 /* This function validates AND fills in the GPT header and PTE */ 221 if (is_gpt_valid(dev_desc, GPT_PRIMARY_PARTITION_TABLE_LBA, 222 gpt_head, &gpt_pte) != 1) { 223 printf("%s: *** ERROR: Invalid GPT ***\n", __func__); 224 if (is_gpt_valid(dev_desc, (dev_desc->lba - 1), 225 gpt_head, &gpt_pte) != 1) { 226 printf("%s: *** ERROR: Invalid Backup GPT ***\n", 227 __func__); 228 return; 229 } else { 230 printf("%s: *** Using Backup GPT ***\n", 231 __func__); 232 } 233 } 234 235 debug("%s: gpt-entry at %p\n", __func__, gpt_pte); 236 237 printf("Part\tStart LBA\tEnd LBA\t\tName\n"); 238 printf("\tAttributes\n"); 239 printf("\tType GUID\n"); 240 printf("\tPartition GUID\n"); 241 242 for (i = 0; i < le32_to_cpu(gpt_head->num_partition_entries); i++) { 243 /* Stop at the first non valid PTE */ 244 if (!is_pte_valid(&gpt_pte[i])) 245 break; 246 247 printf("%3d\t0x%08llx\t0x%08llx\t\"%s\"\n", (i + 1), 248 le64_to_cpu(gpt_pte[i].starting_lba), 249 le64_to_cpu(gpt_pte[i].ending_lba), 250 print_efiname(&gpt_pte[i])); 251 printf("\tattrs:\t0x%016llx\n", gpt_pte[i].attributes.raw); 252 uuid_bin = (unsigned char *)gpt_pte[i].partition_type_guid.b; 253 uuid_bin_to_str(uuid_bin, uuid, UUID_STR_FORMAT_GUID); 254 printf("\ttype:\t%s\n", uuid); 255 #ifdef CONFIG_PARTITION_TYPE_GUID 256 if (!uuid_guid_get_str(uuid_bin, uuid)) 257 printf("\ttype:\t%s\n", uuid); 258 #endif 259 uuid_bin = (unsigned char *)gpt_pte[i].unique_partition_guid.b; 260 uuid_bin_to_str(uuid_bin, uuid, UUID_STR_FORMAT_GUID); 261 printf("\tguid:\t%s\n", uuid); 262 } 263 264 /* Remember to free pte */ 265 free(gpt_pte); 266 return; 267 } 268 269 int part_get_info_efi(struct blk_desc *dev_desc, int part, 270 disk_partition_t *info) 271 { 272 static gpt_entry *gpt_pte = NULL; 273 static gpt_header *gpt_head = NULL; 274 275 if (!gpt_head) 276 gpt_head = memalign(ARCH_DMA_MINALIGN, dev_desc->blksz); 277 278 /* 279 * We suppose different dev have different size, eg. emmc vs sd 280 * free the pte first if exist and then will malloc and init a new one. 281 */ 282 if (gpt_head && (gpt_head->last_usable_lba + 0x22) != dev_desc->lba) { 283 if (gpt_pte) 284 free(gpt_pte); 285 gpt_pte = NULL; 286 } 287 288 /* "part" argument must be at least 1 */ 289 if (part < 1) { 290 printf("%s: Invalid Argument(s)\n", __func__); 291 return -1; 292 } 293 294 /* This function validates AND fills in the GPT header and PTE */ 295 if (is_gpt_valid(dev_desc, GPT_PRIMARY_PARTITION_TABLE_LBA, 296 gpt_head, &gpt_pte) != 1) { 297 printf("%s: *** ERROR: Invalid GPT ***\n", __func__); 298 if (is_gpt_valid(dev_desc, (dev_desc->lba - 1), 299 gpt_head, &gpt_pte) != 1) { 300 printf("%s: *** ERROR: Invalid Backup GPT ***\n", 301 __func__); 302 return -1; 303 } else { 304 printf("%s: *** Using Backup GPT ***\n", 305 __func__); 306 } 307 } 308 309 if (part > le32_to_cpu(gpt_head->num_partition_entries) || 310 !is_pte_valid(&gpt_pte[part - 1])) { 311 debug("%s: *** ERROR: Invalid partition number %d ***\n", 312 __func__, part); 313 return -1; 314 } 315 316 /* The 'lbaint_t' casting may limit the maximum disk size to 2 TB */ 317 info->start = (lbaint_t)le64_to_cpu(gpt_pte[part - 1].starting_lba); 318 /* The ending LBA is inclusive, to calculate size, add 1 to it */ 319 info->size = (lbaint_t)le64_to_cpu(gpt_pte[part - 1].ending_lba) + 1 320 - info->start; 321 info->blksz = dev_desc->blksz; 322 323 sprintf((char *)info->name, "%s", 324 print_efiname(&gpt_pte[part - 1])); 325 strcpy((char *)info->type, "U-Boot"); 326 info->bootable = is_bootable(&gpt_pte[part - 1]); 327 #if CONFIG_IS_ENABLED(PARTITION_UUIDS) 328 uuid_bin_to_str(gpt_pte[part - 1].unique_partition_guid.b, info->uuid, 329 UUID_STR_FORMAT_GUID); 330 #endif 331 #ifdef CONFIG_PARTITION_TYPE_GUID 332 uuid_bin_to_str(gpt_pte[part - 1].partition_type_guid.b, 333 info->type_guid, UUID_STR_FORMAT_GUID); 334 #endif 335 336 debug("%s: start 0x" LBAF ", size 0x" LBAF ", name %s\n", __func__, 337 info->start, info->size, info->name); 338 339 return 0; 340 } 341 342 #ifdef CONFIG_RKIMG_BOOTLOADER 343 static void gpt_entry_modify(struct blk_desc *dev_desc, 344 gpt_entry *gpt_pte, 345 gpt_header *gpt_head) 346 { 347 int i; 348 uint32_t calc_crc32; 349 350 for (i = 0; i < gpt_head->num_partition_entries; i++) { 351 if (!is_pte_valid(&gpt_pte[i])) 352 break; 353 } 354 355 if (gpt_pte[i - 1].ending_lba <= (dev_desc->lba - 0x22)) 356 return; 357 358 gpt_pte[i - 1].ending_lba = dev_desc->lba - 0x22; 359 calc_crc32 = efi_crc32((const unsigned char *)gpt_pte, 360 le32_to_cpu(gpt_head->num_partition_entries) * 361 le32_to_cpu(gpt_head->sizeof_partition_entry)); 362 gpt_head->partition_entry_array_crc32 = calc_crc32; 363 } 364 365 static int part_efi_repair(struct blk_desc *dev_desc, gpt_entry *gpt_pte, 366 gpt_header *gpt_head, int head_gpt_valid, 367 int backup_gpt_valid) 368 { 369 uint32_t calc_crc32; 370 size_t count = 0, blk_cnt; 371 lbaint_t blk; 372 373 if (head_gpt_valid == 1 && backup_gpt_valid == 1) { 374 return 0; 375 } else if (head_gpt_valid == 0 && backup_gpt_valid == 0) { 376 return -1; 377 } else if (head_gpt_valid == 1 && backup_gpt_valid == 0) { 378 gpt_head->header_crc32 = 0; 379 gpt_head->my_lba = dev_desc->lba - 1; 380 gpt_head->alternate_lba = 1; 381 gpt_head->partition_entry_lba = dev_desc->lba - 0x21; 382 gpt_entry_modify(dev_desc, gpt_pte, gpt_head); 383 calc_crc32 = efi_crc32((const unsigned char *)gpt_head, 384 le32_to_cpu(gpt_head->header_size)); 385 gpt_head->header_crc32 = calc_crc32; 386 if (blk_dwrite(dev_desc, dev_desc->lba - 1, 1, gpt_head) != 1) { 387 printf("*** ERROR: Can't write GPT header ***\n"); 388 return -1; 389 } 390 count = le32_to_cpu(gpt_head->num_partition_entries) * 391 le32_to_cpu(gpt_head->sizeof_partition_entry); 392 blk = le64_to_cpu(gpt_head->partition_entry_lba); 393 blk_cnt = BLOCK_CNT(count, dev_desc); 394 if (blk_dwrite(dev_desc, blk, (lbaint_t)blk_cnt, gpt_pte) != 395 blk_cnt) { 396 printf("*** ERROR: Can't write entry partitions ***\n"); 397 return -1; 398 } 399 printf("Repair the backup gpt table OK!\n"); 400 } else if (head_gpt_valid == 0 && backup_gpt_valid == 1) { 401 gpt_head->header_crc32 = 0; 402 gpt_head->my_lba = 1; 403 gpt_head->alternate_lba = dev_desc->lba - 1; 404 gpt_head->partition_entry_lba = 0x22; 405 gpt_entry_modify(dev_desc, gpt_pte, gpt_head); 406 calc_crc32 = efi_crc32((const unsigned char *)gpt_head, 407 le32_to_cpu(gpt_head->header_size)); 408 gpt_head->header_crc32 = calc_crc32; 409 if (blk_dwrite(dev_desc, 1, 1, gpt_head) != 1) { 410 printf("*** ERROR: Can't write GPT header ***\n"); 411 return -1; 412 } 413 count = le32_to_cpu(gpt_head->num_partition_entries) * 414 le32_to_cpu(gpt_head->sizeof_partition_entry); 415 blk = le64_to_cpu(gpt_head->partition_entry_lba); 416 blk_cnt = BLOCK_CNT(count, dev_desc); 417 if (blk_dwrite(dev_desc, blk, (lbaint_t)blk_cnt, gpt_pte) != 418 blk_cnt) { 419 printf("*** ERROR: Can't write entry partitions ***\n"); 420 return -1; 421 } 422 printf("Repair the Primary gpt table OK!\n"); 423 } 424 425 return 0; 426 } 427 #endif 428 429 static int part_test_efi(struct blk_desc *dev_desc) 430 { 431 ALLOC_CACHE_ALIGN_BUFFER_PAD(legacy_mbr, legacymbr, 1, dev_desc->blksz); 432 int ret = 0; 433 434 /* Read legacy MBR from block 0 and validate it */ 435 if ((blk_dread(dev_desc, 0, 1, (ulong *)legacymbr) != 1) 436 || (is_pmbr_valid(legacymbr) != 1)) { 437 return -1; 438 } 439 #ifdef CONFIG_RKIMG_BOOTLOADER 440 gpt_entry *h_gpt_pte = NULL; 441 gpt_header *h_gpt_head = NULL; 442 gpt_entry *b_gpt_pte = NULL; 443 gpt_header *b_gpt_head = NULL; 444 int head_gpt_valid = 0; 445 int backup_gpt_valid = 0; 446 447 if (!h_gpt_head) 448 h_gpt_head = memalign(ARCH_DMA_MINALIGN, dev_desc->blksz); 449 if (!b_gpt_head) 450 b_gpt_head = memalign(ARCH_DMA_MINALIGN, dev_desc->blksz); 451 452 head_gpt_valid = is_gpt_valid(dev_desc, GPT_PRIMARY_PARTITION_TABLE_LBA, 453 h_gpt_head, &h_gpt_pte); 454 backup_gpt_valid = is_gpt_valid(dev_desc, (dev_desc->lba - 1), 455 b_gpt_head, &b_gpt_pte); 456 if (head_gpt_valid == 1 && backup_gpt_valid == 0) { 457 if (part_efi_repair(dev_desc, h_gpt_pte, h_gpt_head, 458 head_gpt_valid, backup_gpt_valid)) 459 printf("Backup GPT repair fail!\n"); 460 } else if (head_gpt_valid == 0 && backup_gpt_valid == 1) { 461 if (part_efi_repair(dev_desc, b_gpt_pte, b_gpt_head, 462 head_gpt_valid, backup_gpt_valid)) 463 printf("Primary GPT repair fail!\n"); 464 } else if (head_gpt_valid == 0 && backup_gpt_valid == 0) { 465 ret = -1; 466 } 467 468 free(h_gpt_pte); 469 h_gpt_pte = NULL; 470 free(h_gpt_head); 471 h_gpt_head = NULL; 472 free(b_gpt_pte); 473 b_gpt_pte = NULL; 474 free(b_gpt_head); 475 b_gpt_head = NULL; 476 #endif 477 return ret; 478 } 479 480 /** 481 * set_protective_mbr(): Set the EFI protective MBR 482 * @param dev_desc - block device descriptor 483 * 484 * @return - zero on success, otherwise error 485 */ 486 static int set_protective_mbr(struct blk_desc *dev_desc) 487 { 488 /* Setup the Protective MBR */ 489 ALLOC_CACHE_ALIGN_BUFFER(legacy_mbr, p_mbr, 1); 490 memset(p_mbr, 0, sizeof(*p_mbr)); 491 492 if (p_mbr == NULL) { 493 printf("%s: calloc failed!\n", __func__); 494 return -1; 495 } 496 497 /* Read MBR to backup boot code if it exists */ 498 if (blk_dread(dev_desc, 0, 1, p_mbr) != 1) { 499 pr_err("** Can't read from device %d **\n", dev_desc->devnum); 500 return -1; 501 } 502 503 /* Append signature */ 504 p_mbr->signature = MSDOS_MBR_SIGNATURE; 505 p_mbr->partition_record[0].sys_ind = EFI_PMBR_OSTYPE_EFI_GPT; 506 p_mbr->partition_record[0].start_sect = 1; 507 p_mbr->partition_record[0].nr_sects = (u32) dev_desc->lba - 1; 508 509 /* Write MBR sector to the MMC device */ 510 if (blk_dwrite(dev_desc, 0, 1, p_mbr) != 1) { 511 printf("** Can't write to device %d **\n", 512 dev_desc->devnum); 513 return -1; 514 } 515 516 return 0; 517 } 518 519 int write_gpt_table(struct blk_desc *dev_desc, 520 gpt_header *gpt_h, gpt_entry *gpt_e) 521 { 522 const int pte_blk_cnt = BLOCK_CNT((gpt_h->num_partition_entries 523 * sizeof(gpt_entry)), dev_desc); 524 u32 calc_crc32; 525 526 debug("max lba: %x\n", (u32) dev_desc->lba); 527 /* Setup the Protective MBR */ 528 if (set_protective_mbr(dev_desc) < 0) 529 goto err; 530 531 /* Generate CRC for the Primary GPT Header */ 532 calc_crc32 = efi_crc32((const unsigned char *)gpt_e, 533 le32_to_cpu(gpt_h->num_partition_entries) * 534 le32_to_cpu(gpt_h->sizeof_partition_entry)); 535 gpt_h->partition_entry_array_crc32 = cpu_to_le32(calc_crc32); 536 537 calc_crc32 = efi_crc32((const unsigned char *)gpt_h, 538 le32_to_cpu(gpt_h->header_size)); 539 gpt_h->header_crc32 = cpu_to_le32(calc_crc32); 540 541 /* Write the First GPT to the block right after the Legacy MBR */ 542 if (blk_dwrite(dev_desc, 1, 1, gpt_h) != 1) 543 goto err; 544 545 if (blk_dwrite(dev_desc, le64_to_cpu(gpt_h->partition_entry_lba), 546 pte_blk_cnt, gpt_e) != pte_blk_cnt) 547 goto err; 548 549 prepare_backup_gpt_header(gpt_h); 550 551 if (blk_dwrite(dev_desc, (lbaint_t)le64_to_cpu(gpt_h->last_usable_lba) 552 + 1, pte_blk_cnt, gpt_e) != pte_blk_cnt) 553 goto err; 554 555 if (blk_dwrite(dev_desc, (lbaint_t)le64_to_cpu(gpt_h->my_lba), 1, 556 gpt_h) != 1) 557 goto err; 558 559 debug("GPT successfully written to block device!\n"); 560 return 0; 561 562 err: 563 printf("** Can't write to device %d **\n", dev_desc->devnum); 564 return -1; 565 } 566 567 int gpt_fill_pte(struct blk_desc *dev_desc, 568 gpt_header *gpt_h, gpt_entry *gpt_e, 569 disk_partition_t *partitions, int parts) 570 { 571 lbaint_t offset = (lbaint_t)le64_to_cpu(gpt_h->first_usable_lba); 572 lbaint_t last_usable_lba = (lbaint_t) 573 le64_to_cpu(gpt_h->last_usable_lba); 574 int i, k; 575 size_t efiname_len, dosname_len; 576 #if CONFIG_IS_ENABLED(PARTITION_UUIDS) 577 char *str_uuid; 578 unsigned char *bin_uuid; 579 #endif 580 #ifdef CONFIG_PARTITION_TYPE_GUID 581 char *str_type_guid; 582 unsigned char *bin_type_guid; 583 #endif 584 size_t hdr_start = gpt_h->my_lba; 585 size_t hdr_end = hdr_start + 1; 586 587 size_t pte_start = gpt_h->partition_entry_lba; 588 size_t pte_end = pte_start + 589 gpt_h->num_partition_entries * gpt_h->sizeof_partition_entry / 590 dev_desc->blksz; 591 592 for (i = 0; i < parts; i++) { 593 /* partition starting lba */ 594 lbaint_t start = partitions[i].start; 595 lbaint_t size = partitions[i].size; 596 597 if (start) { 598 offset = start + size; 599 } else { 600 start = offset; 601 offset += size; 602 } 603 604 /* 605 * If our partition overlaps with either the GPT 606 * header, or the partition entry, reject it. 607 */ 608 if (((start < hdr_end && hdr_start < (start + size)) || 609 (start < pte_end && pte_start < (start + size)))) { 610 printf("Partition overlap\n"); 611 return -1; 612 } 613 614 gpt_e[i].starting_lba = cpu_to_le64(start); 615 616 if (offset > (last_usable_lba + 1)) { 617 printf("Partitions layout exceds disk size\n"); 618 return -1; 619 } 620 /* partition ending lba */ 621 if ((i == parts - 1) && (size == 0)) 622 /* extend the last partition to maximuim */ 623 gpt_e[i].ending_lba = gpt_h->last_usable_lba; 624 else 625 gpt_e[i].ending_lba = cpu_to_le64(offset - 1); 626 627 #ifdef CONFIG_PARTITION_TYPE_GUID 628 str_type_guid = partitions[i].type_guid; 629 bin_type_guid = gpt_e[i].partition_type_guid.b; 630 if (strlen(str_type_guid)) { 631 if (uuid_str_to_bin(str_type_guid, bin_type_guid, 632 UUID_STR_FORMAT_GUID)) { 633 printf("Partition no. %d: invalid type guid: %s\n", 634 i, str_type_guid); 635 return -1; 636 } 637 } else { 638 /* default partition type GUID */ 639 memcpy(bin_type_guid, 640 &PARTITION_BASIC_DATA_GUID, 16); 641 } 642 #else 643 /* partition type GUID */ 644 memcpy(gpt_e[i].partition_type_guid.b, 645 &PARTITION_BASIC_DATA_GUID, 16); 646 #endif 647 648 #if CONFIG_IS_ENABLED(PARTITION_UUIDS) 649 str_uuid = partitions[i].uuid; 650 bin_uuid = gpt_e[i].unique_partition_guid.b; 651 652 if (uuid_str_to_bin(str_uuid, bin_uuid, UUID_STR_FORMAT_GUID)) { 653 printf("Partition no. %d: invalid guid: %s\n", 654 i, str_uuid); 655 return -1; 656 } 657 #endif 658 659 /* partition attributes */ 660 memset(&gpt_e[i].attributes, 0, 661 sizeof(gpt_entry_attributes)); 662 663 if (partitions[i].bootable) 664 gpt_e[i].attributes.fields.legacy_bios_bootable = 1; 665 666 /* partition name */ 667 efiname_len = sizeof(gpt_e[i].partition_name) 668 / sizeof(efi_char16_t); 669 dosname_len = sizeof(partitions[i].name); 670 671 memset(gpt_e[i].partition_name, 0, 672 sizeof(gpt_e[i].partition_name)); 673 674 for (k = 0; k < min(dosname_len, efiname_len); k++) 675 gpt_e[i].partition_name[k] = 676 (efi_char16_t)(partitions[i].name[k]); 677 678 debug("%s: name: %s offset[%d]: 0x" LBAF 679 " size[%d]: 0x" LBAF "\n", 680 __func__, partitions[i].name, i, 681 offset, i, size); 682 } 683 684 return 0; 685 } 686 687 static uint32_t partition_entries_offset(struct blk_desc *dev_desc) 688 { 689 uint32_t offset_blks = 2; 690 uint32_t __maybe_unused offset_bytes; 691 int __maybe_unused config_offset; 692 693 #if defined(CONFIG_EFI_PARTITION_ENTRIES_OFF) 694 /* 695 * Some architectures require their SPL loader at a fixed 696 * address within the first 16KB of the disk. To avoid an 697 * overlap with the partition entries of the EFI partition 698 * table, the first safe offset (in bytes, from the start of 699 * the disk) for the entries can be set in 700 * CONFIG_EFI_PARTITION_ENTRIES_OFF. 701 */ 702 offset_bytes = 703 PAD_TO_BLOCKSIZE(CONFIG_EFI_PARTITION_ENTRIES_OFF, dev_desc); 704 offset_blks = offset_bytes / dev_desc->blksz; 705 #endif 706 707 #if defined(CONFIG_OF_CONTROL) 708 /* 709 * Allow the offset of the first partition entires (in bytes 710 * from the start of the device) to be specified as a property 711 * of the device tree '/config' node. 712 */ 713 config_offset = fdtdec_get_config_int(gd->fdt_blob, 714 "u-boot,efi-partition-entries-offset", 715 -EINVAL); 716 if (config_offset != -EINVAL) { 717 offset_bytes = PAD_TO_BLOCKSIZE(config_offset, dev_desc); 718 offset_blks = offset_bytes / dev_desc->blksz; 719 } 720 #endif 721 722 debug("efi: partition entries offset (in blocks): %d\n", offset_blks); 723 724 /* 725 * The earliest LBA this can be at is LBA#2 (i.e. right behind 726 * the (protective) MBR and the GPT header. 727 */ 728 if (offset_blks < 2) 729 offset_blks = 2; 730 731 return offset_blks; 732 } 733 734 int gpt_fill_header(struct blk_desc *dev_desc, gpt_header *gpt_h, 735 char *str_guid, int parts_count) 736 { 737 gpt_h->signature = cpu_to_le64(GPT_HEADER_SIGNATURE); 738 gpt_h->revision = cpu_to_le32(GPT_HEADER_REVISION_V1); 739 gpt_h->header_size = cpu_to_le32(sizeof(gpt_header)); 740 gpt_h->my_lba = cpu_to_le64(1); 741 gpt_h->alternate_lba = cpu_to_le64(dev_desc->lba - 1); 742 gpt_h->last_usable_lba = cpu_to_le64(dev_desc->lba - 34); 743 gpt_h->partition_entry_lba = 744 cpu_to_le64(partition_entries_offset(dev_desc)); 745 gpt_h->first_usable_lba = 746 cpu_to_le64(le64_to_cpu(gpt_h->partition_entry_lba) + 32); 747 gpt_h->num_partition_entries = cpu_to_le32(GPT_ENTRY_NUMBERS); 748 gpt_h->sizeof_partition_entry = cpu_to_le32(sizeof(gpt_entry)); 749 gpt_h->header_crc32 = 0; 750 gpt_h->partition_entry_array_crc32 = 0; 751 752 if (uuid_str_to_bin(str_guid, gpt_h->disk_guid.b, UUID_STR_FORMAT_GUID)) 753 return -1; 754 755 return 0; 756 } 757 758 int gpt_restore(struct blk_desc *dev_desc, char *str_disk_guid, 759 disk_partition_t *partitions, int parts_count) 760 { 761 gpt_header *gpt_h; 762 gpt_entry *gpt_e; 763 int ret, size; 764 765 size = PAD_TO_BLOCKSIZE(sizeof(gpt_header), dev_desc); 766 gpt_h = malloc_cache_aligned(size); 767 if (gpt_h == NULL) { 768 printf("%s: calloc failed!\n", __func__); 769 return -1; 770 } 771 memset(gpt_h, 0, size); 772 773 size = PAD_TO_BLOCKSIZE(GPT_ENTRY_NUMBERS * sizeof(gpt_entry), 774 dev_desc); 775 gpt_e = malloc_cache_aligned(size); 776 if (gpt_e == NULL) { 777 printf("%s: calloc failed!\n", __func__); 778 free(gpt_h); 779 return -1; 780 } 781 memset(gpt_e, 0, size); 782 783 /* Generate Primary GPT header (LBA1) */ 784 ret = gpt_fill_header(dev_desc, gpt_h, str_disk_guid, parts_count); 785 if (ret) 786 goto err; 787 788 /* Generate partition entries */ 789 ret = gpt_fill_pte(dev_desc, gpt_h, gpt_e, partitions, parts_count); 790 if (ret) 791 goto err; 792 793 /* Write GPT partition table */ 794 ret = write_gpt_table(dev_desc, gpt_h, gpt_e); 795 796 err: 797 free(gpt_e); 798 free(gpt_h); 799 return ret; 800 } 801 802 static void gpt_convert_efi_name_to_char(char *s, efi_char16_t *es, int n) 803 { 804 char *ess = (char *)es; 805 int i, j; 806 807 memset(s, '\0', n); 808 809 for (i = 0, j = 0; j < n; i += 2, j++) { 810 s[j] = ess[i]; 811 if (!ess[i]) 812 return; 813 } 814 } 815 816 int gpt_verify_headers(struct blk_desc *dev_desc, gpt_header *gpt_head, 817 gpt_entry **gpt_pte) 818 { 819 /* 820 * This function validates AND 821 * fills in the GPT header and PTE 822 */ 823 if (is_gpt_valid(dev_desc, 824 GPT_PRIMARY_PARTITION_TABLE_LBA, 825 gpt_head, gpt_pte) != 1) { 826 printf("%s: *** ERROR: Invalid GPT ***\n", 827 __func__); 828 return -1; 829 } 830 if (is_gpt_valid(dev_desc, (dev_desc->lba - 1), 831 gpt_head, gpt_pte) != 1) { 832 printf("%s: *** ERROR: Invalid Backup GPT ***\n", 833 __func__); 834 return -1; 835 } 836 837 return 0; 838 } 839 840 int gpt_verify_partitions(struct blk_desc *dev_desc, 841 disk_partition_t *partitions, int parts, 842 gpt_header *gpt_head, gpt_entry **gpt_pte) 843 { 844 char efi_str[PARTNAME_SZ + 1]; 845 u64 gpt_part_size; 846 gpt_entry *gpt_e; 847 int ret, i; 848 849 ret = gpt_verify_headers(dev_desc, gpt_head, gpt_pte); 850 if (ret) 851 return ret; 852 853 gpt_e = *gpt_pte; 854 855 for (i = 0; i < parts; i++) { 856 if (i == gpt_head->num_partition_entries) { 857 pr_err("More partitions than allowed!\n"); 858 return -1; 859 } 860 861 /* Check if GPT and ENV partition names match */ 862 gpt_convert_efi_name_to_char(efi_str, gpt_e[i].partition_name, 863 PARTNAME_SZ + 1); 864 865 debug("%s: part: %2d name - GPT: %16s, ENV: %16s ", 866 __func__, i, efi_str, partitions[i].name); 867 868 if (strncmp(efi_str, (char *)partitions[i].name, 869 sizeof(partitions->name))) { 870 pr_err("Partition name: %s does not match %s!\n", 871 efi_str, (char *)partitions[i].name); 872 return -1; 873 } 874 875 /* Check if GPT and ENV sizes match */ 876 gpt_part_size = le64_to_cpu(gpt_e[i].ending_lba) - 877 le64_to_cpu(gpt_e[i].starting_lba) + 1; 878 debug("size(LBA) - GPT: %8llu, ENV: %8llu ", 879 (unsigned long long)gpt_part_size, 880 (unsigned long long)partitions[i].size); 881 882 if (le64_to_cpu(gpt_part_size) != partitions[i].size) { 883 /* We do not check the extend partition size */ 884 if ((i == parts - 1) && (partitions[i].size == 0)) 885 continue; 886 887 pr_err("Partition %s size: %llu does not match %llu!\n", 888 efi_str, (unsigned long long)gpt_part_size, 889 (unsigned long long)partitions[i].size); 890 return -1; 891 } 892 893 /* 894 * Start address is optional - check only if provided 895 * in '$partition' variable 896 */ 897 if (!partitions[i].start) { 898 debug("\n"); 899 continue; 900 } 901 902 /* Check if GPT and ENV start LBAs match */ 903 debug("start LBA - GPT: %8llu, ENV: %8llu\n", 904 le64_to_cpu(gpt_e[i].starting_lba), 905 (unsigned long long)partitions[i].start); 906 907 if (le64_to_cpu(gpt_e[i].starting_lba) != partitions[i].start) { 908 pr_err("Partition %s start: %llu does not match %llu!\n", 909 efi_str, le64_to_cpu(gpt_e[i].starting_lba), 910 (unsigned long long)partitions[i].start); 911 return -1; 912 } 913 } 914 915 return 0; 916 } 917 918 int is_valid_gpt_buf(struct blk_desc *dev_desc, void *buf) 919 { 920 gpt_header *gpt_h; 921 gpt_entry *gpt_e; 922 923 /* determine start of GPT Header in the buffer */ 924 gpt_h = buf + (GPT_PRIMARY_PARTITION_TABLE_LBA * 925 dev_desc->blksz); 926 927 if ((le64_to_cpu(gpt_h->alternate_lba) + 1) 928 != cpu_to_le64(dev_desc->lba)) { 929 printf("%s: failed checking '%s'\n", __func__, 930 "invalid GPT Disk Size"); 931 return -1; 932 } 933 934 if (validate_gpt_header(gpt_h, GPT_PRIMARY_PARTITION_TABLE_LBA, 935 dev_desc->lba)) 936 return -1; 937 938 /* determine start of GPT Entries in the buffer */ 939 gpt_e = buf + (le64_to_cpu(gpt_h->partition_entry_lba) * 940 dev_desc->blksz); 941 if (validate_gpt_entries(gpt_h, gpt_e)) 942 return -1; 943 944 return 0; 945 } 946 947 int write_mbr_and_gpt_partitions(struct blk_desc *dev_desc, void *buf) 948 { 949 gpt_header *gpt_h; 950 gpt_entry *gpt_e; 951 int gpt_e_blk_cnt; 952 lbaint_t lba; 953 int cnt; 954 955 if (is_valid_gpt_buf(dev_desc, buf)) 956 return -1; 957 958 /* determine start of GPT Header in the buffer */ 959 gpt_h = buf + (GPT_PRIMARY_PARTITION_TABLE_LBA * 960 dev_desc->blksz); 961 962 /* determine start of GPT Entries in the buffer */ 963 gpt_e = buf + (le64_to_cpu(gpt_h->partition_entry_lba) * 964 dev_desc->blksz); 965 gpt_e_blk_cnt = BLOCK_CNT((le32_to_cpu(gpt_h->num_partition_entries) * 966 le32_to_cpu(gpt_h->sizeof_partition_entry)), 967 dev_desc); 968 969 /* write MBR */ 970 lba = 0; /* MBR is always at 0 */ 971 cnt = 1; /* MBR (1 block) */ 972 if (blk_dwrite(dev_desc, lba, cnt, buf) != cnt) { 973 printf("%s: failed writing '%s' (%d blks at 0x" LBAF ")\n", 974 __func__, "MBR", cnt, lba); 975 return 1; 976 } 977 978 /* write Primary GPT */ 979 lba = GPT_PRIMARY_PARTITION_TABLE_LBA; 980 cnt = 1; /* GPT Header (1 block) */ 981 if (blk_dwrite(dev_desc, lba, cnt, gpt_h) != cnt) { 982 printf("%s: failed writing '%s' (%d blks at 0x" LBAF ")\n", 983 __func__, "Primary GPT Header", cnt, lba); 984 return 1; 985 } 986 987 lba = le64_to_cpu(gpt_h->partition_entry_lba); 988 cnt = gpt_e_blk_cnt; 989 if (blk_dwrite(dev_desc, lba, cnt, gpt_e) != cnt) { 990 printf("%s: failed writing '%s' (%d blks at 0x" LBAF ")\n", 991 __func__, "Primary GPT Entries", cnt, lba); 992 return 1; 993 } 994 995 prepare_backup_gpt_header(gpt_h); 996 997 /* write Backup GPT */ 998 lba = le64_to_cpu(gpt_h->partition_entry_lba); 999 cnt = gpt_e_blk_cnt; 1000 if (blk_dwrite(dev_desc, lba, cnt, gpt_e) != cnt) { 1001 printf("%s: failed writing '%s' (%d blks at 0x" LBAF ")\n", 1002 __func__, "Backup GPT Entries", cnt, lba); 1003 return 1; 1004 } 1005 1006 lba = le64_to_cpu(gpt_h->my_lba); 1007 cnt = 1; /* GPT Header (1 block) */ 1008 if (blk_dwrite(dev_desc, lba, cnt, gpt_h) != cnt) { 1009 printf("%s: failed writing '%s' (%d blks at 0x" LBAF ")\n", 1010 __func__, "Backup GPT Header", cnt, lba); 1011 return 1; 1012 } 1013 1014 return 0; 1015 } 1016 #endif 1017 1018 /* 1019 * Private functions 1020 */ 1021 /* 1022 * pmbr_part_valid(): Check for EFI partition signature 1023 * 1024 * Returns: 1 if EFI GPT partition type is found. 1025 */ 1026 static int pmbr_part_valid(struct partition *part) 1027 { 1028 if (part->sys_ind == EFI_PMBR_OSTYPE_EFI_GPT && 1029 get_unaligned_le32(&part->start_sect) == 1UL) { 1030 return 1; 1031 } 1032 1033 return 0; 1034 } 1035 1036 /* 1037 * is_pmbr_valid(): test Protective MBR for validity 1038 * 1039 * Returns: 1 if PMBR is valid, 0 otherwise. 1040 * Validity depends on two things: 1041 * 1) MSDOS signature is in the last two bytes of the MBR 1042 * 2) One partition of type 0xEE is found, checked by pmbr_part_valid() 1043 */ 1044 static int is_pmbr_valid(legacy_mbr * mbr) 1045 { 1046 int i = 0; 1047 1048 if (!mbr || le16_to_cpu(mbr->signature) != MSDOS_MBR_SIGNATURE) 1049 return 0; 1050 1051 #ifdef CONFIG_ARCH_ROCKCHIP 1052 /* 1053 * In sd-update card, we use RKPARM partition in bootloader to load 1054 * firmware, and use MS-DOS partition in recovery to update system. 1055 * Now, we want to use gpt in bootloader and abandon the RKPARM 1056 * partition. So in new sd-update card, we write the MS-DOS partition 1057 * table and gpt to sd card. Then we must return 1 directly when test 1058 * the mbr sector otherwise the gpt is unavailable. 1059 */ 1060 return 1; 1061 #endif 1062 for (i = 0; i < 4; i++) { 1063 if (pmbr_part_valid(&mbr->partition_record[i])) { 1064 return 1; 1065 } 1066 } 1067 return 0; 1068 } 1069 1070 /** 1071 * is_gpt_valid() - tests one GPT header and PTEs for validity 1072 * 1073 * lba is the logical block address of the GPT header to test 1074 * gpt is a GPT header ptr, filled on return. 1075 * ptes is a PTEs ptr, filled on return. 1076 * 1077 * Description: returns 1 if valid, 0 on error. 1078 * If valid, returns pointers to PTEs. 1079 */ 1080 static int is_gpt_valid(struct blk_desc *dev_desc, u64 lba, 1081 gpt_header *pgpt_head, gpt_entry **pgpt_pte) 1082 { 1083 /* Confirm valid arguments prior to allocation. */ 1084 if (!dev_desc || !pgpt_head) { 1085 printf("%s: Invalid Argument(s)\n", __func__); 1086 return 0; 1087 } 1088 1089 /* Re-use pte if it's not NULL */ 1090 if (*pgpt_pte) 1091 return 1; 1092 1093 ALLOC_CACHE_ALIGN_BUFFER(legacy_mbr, mbr, dev_desc->blksz); 1094 1095 /* Read MBR Header from device */ 1096 if (blk_dread(dev_desc, 0, 1, (ulong *)mbr) != 1) { 1097 printf("*** ERROR: Can't read MBR header ***\n"); 1098 return 0; 1099 } 1100 1101 /* Read GPT Header from device */ 1102 if (blk_dread(dev_desc, (lbaint_t)lba, 1, pgpt_head) != 1) { 1103 printf("*** ERROR: Can't read GPT header ***\n"); 1104 return 0; 1105 } 1106 1107 if (validate_gpt_header(pgpt_head, (lbaint_t)lba, dev_desc->lba)) 1108 return 0; 1109 1110 if (dev_desc->sig_type == SIG_TYPE_NONE) { 1111 efi_guid_t empty = {}; 1112 if (memcmp(&pgpt_head->disk_guid, &empty, sizeof(empty))) { 1113 dev_desc->sig_type = SIG_TYPE_GUID; 1114 memcpy(&dev_desc->guid_sig, &pgpt_head->disk_guid, 1115 sizeof(empty)); 1116 } else if (mbr->unique_mbr_signature != 0) { 1117 dev_desc->sig_type = SIG_TYPE_MBR; 1118 dev_desc->mbr_sig = mbr->unique_mbr_signature; 1119 } 1120 } 1121 1122 /* Read and allocate Partition Table Entries */ 1123 *pgpt_pte = alloc_read_gpt_entries(dev_desc, pgpt_head); 1124 if (*pgpt_pte == NULL) { 1125 printf("GPT: Failed to allocate memory for PTE\n"); 1126 return 0; 1127 } 1128 1129 if (validate_gpt_entries(pgpt_head, *pgpt_pte)) { 1130 free(*pgpt_pte); 1131 *pgpt_pte = NULL; 1132 return 0; 1133 } 1134 1135 /* We're done, all's well */ 1136 return 1; 1137 } 1138 1139 /** 1140 * alloc_read_gpt_entries(): reads partition entries from disk 1141 * @dev_desc 1142 * @gpt - GPT header 1143 * 1144 * Description: Returns ptes on success, NULL on error. 1145 * Allocates space for PTEs based on information found in @gpt. 1146 * Notes: remember to free pte when you're done! 1147 */ 1148 static gpt_entry *alloc_read_gpt_entries(struct blk_desc *dev_desc, 1149 gpt_header *pgpt_head) 1150 { 1151 size_t count = 0, blk_cnt; 1152 lbaint_t blk; 1153 gpt_entry *pte = NULL; 1154 1155 if (!dev_desc || !pgpt_head) { 1156 printf("%s: Invalid Argument(s)\n", __func__); 1157 return NULL; 1158 } 1159 1160 count = le32_to_cpu(pgpt_head->num_partition_entries) * 1161 le32_to_cpu(pgpt_head->sizeof_partition_entry); 1162 1163 debug("%s: count = %u * %u = %lu\n", __func__, 1164 (u32) le32_to_cpu(pgpt_head->num_partition_entries), 1165 (u32) le32_to_cpu(pgpt_head->sizeof_partition_entry), 1166 (ulong)count); 1167 1168 /* Allocate memory for PTE, remember to FREE */ 1169 if (count != 0) { 1170 pte = memalign(ARCH_DMA_MINALIGN, 1171 PAD_TO_BLOCKSIZE(count, dev_desc)); 1172 } 1173 1174 if (count == 0 || pte == NULL) { 1175 printf("%s: ERROR: Can't allocate %#lX bytes for GPT Entries\n", 1176 __func__, (ulong)count); 1177 return NULL; 1178 } 1179 1180 /* Read GPT Entries from device */ 1181 blk = le64_to_cpu(pgpt_head->partition_entry_lba); 1182 blk_cnt = BLOCK_CNT(count, dev_desc); 1183 if (blk_dread(dev_desc, blk, (lbaint_t)blk_cnt, pte) != blk_cnt) { 1184 printf("*** ERROR: Can't read GPT Entries ***\n"); 1185 free(pte); 1186 return NULL; 1187 } 1188 return pte; 1189 } 1190 1191 /** 1192 * is_pte_valid(): validates a single Partition Table Entry 1193 * @gpt_entry - Pointer to a single Partition Table Entry 1194 * 1195 * Description: returns 1 if valid, 0 on error. 1196 */ 1197 static int is_pte_valid(gpt_entry * pte) 1198 { 1199 efi_guid_t unused_guid; 1200 1201 if (!pte) { 1202 printf("%s: Invalid Argument(s)\n", __func__); 1203 return 0; 1204 } 1205 1206 /* Only one validation for now: 1207 * The GUID Partition Type != Unused Entry (ALL-ZERO) 1208 */ 1209 memset(unused_guid.b, 0, sizeof(unused_guid.b)); 1210 1211 if (memcmp(pte->partition_type_guid.b, unused_guid.b, 1212 sizeof(unused_guid.b)) == 0) { 1213 1214 debug("%s: Found an unused PTE GUID at 0x%08X\n", __func__, 1215 (unsigned int)(uintptr_t)pte); 1216 1217 return 0; 1218 } else { 1219 return 1; 1220 } 1221 } 1222 1223 /* 1224 * Add an 'a_' prefix so it comes before 'dos' in the linker list. We need to 1225 * check EFI first, since a DOS partition is often used as a 'protective MBR' 1226 * with EFI. 1227 */ 1228 U_BOOT_PART_TYPE(a_efi) = { 1229 .name = "EFI", 1230 .part_type = PART_TYPE_EFI, 1231 .max_entries = GPT_ENTRY_NUMBERS, 1232 .get_info = part_get_info_ptr(part_get_info_efi), 1233 .print = part_print_ptr(part_print_efi), 1234 .test = part_test_efi, 1235 }; 1236 #endif 1237