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 if (le64_to_cpu(gpt_h->signature) != 0) 84 printf("%s signature is wrong: 0x%llX != 0x%llX\n", 85 "GUID Partition Table Header", 86 le64_to_cpu(gpt_h->signature), 87 GPT_HEADER_SIGNATURE); 88 return -1; 89 } 90 91 /* Check the GUID Partition Table CRC */ 92 memcpy(&crc32_backup, &gpt_h->header_crc32, sizeof(crc32_backup)); 93 memset(&gpt_h->header_crc32, 0, sizeof(gpt_h->header_crc32)); 94 95 calc_crc32 = efi_crc32((const unsigned char *)gpt_h, 96 le32_to_cpu(gpt_h->header_size)); 97 98 memcpy(&gpt_h->header_crc32, &crc32_backup, sizeof(crc32_backup)); 99 100 if (calc_crc32 != le32_to_cpu(crc32_backup)) { 101 printf("%s CRC is wrong: 0x%x != 0x%x\n", 102 "GUID Partition Table Header", 103 le32_to_cpu(crc32_backup), calc_crc32); 104 return -1; 105 } 106 107 /* 108 * Check that the my_lba entry points to the LBA that contains the GPT 109 */ 110 if (le64_to_cpu(gpt_h->my_lba) != lba) { 111 printf("GPT: my_lba incorrect: %llX != " LBAF "\n", 112 le64_to_cpu(gpt_h->my_lba), 113 lba); 114 return -1; 115 } 116 117 /* 118 * Check that the first_usable_lba and that the last_usable_lba are 119 * within the disk. 120 */ 121 if (le64_to_cpu(gpt_h->first_usable_lba) > lastlba) { 122 printf("GPT: first_usable_lba incorrect: %llX > " LBAF "\n", 123 le64_to_cpu(gpt_h->first_usable_lba), lastlba); 124 return -1; 125 } 126 if (le64_to_cpu(gpt_h->last_usable_lba) > lastlba) { 127 printf("GPT: last_usable_lba incorrect: %llX > " LBAF "\n", 128 le64_to_cpu(gpt_h->last_usable_lba), lastlba); 129 return -1; 130 } 131 132 debug("GPT: first_usable_lba: %llX last_usable_lba: %llX last lba: " 133 LBAF "\n", le64_to_cpu(gpt_h->first_usable_lba), 134 le64_to_cpu(gpt_h->last_usable_lba), lastlba); 135 136 return 0; 137 } 138 139 static int validate_gpt_entries(gpt_header *gpt_h, gpt_entry *gpt_e) 140 { 141 uint32_t calc_crc32; 142 143 /* Check the GUID Partition Table Entry Array CRC */ 144 calc_crc32 = efi_crc32((const unsigned char *)gpt_e, 145 le32_to_cpu(gpt_h->num_partition_entries) * 146 le32_to_cpu(gpt_h->sizeof_partition_entry)); 147 148 if (calc_crc32 != le32_to_cpu(gpt_h->partition_entry_array_crc32)) { 149 printf("%s: 0x%x != 0x%x\n", 150 "GUID Partition Table Entry Array CRC is wrong", 151 le32_to_cpu(gpt_h->partition_entry_array_crc32), 152 calc_crc32); 153 return -1; 154 } 155 156 return 0; 157 } 158 159 static void prepare_backup_gpt_header(gpt_header *gpt_h) 160 { 161 uint32_t calc_crc32; 162 uint64_t val; 163 164 /* recalculate the values for the Backup GPT Header */ 165 val = le64_to_cpu(gpt_h->my_lba); 166 gpt_h->my_lba = gpt_h->alternate_lba; 167 gpt_h->alternate_lba = cpu_to_le64(val); 168 gpt_h->partition_entry_lba = 169 cpu_to_le64(le64_to_cpu(gpt_h->last_usable_lba) + 1); 170 gpt_h->header_crc32 = 0; 171 172 calc_crc32 = efi_crc32((const unsigned char *)gpt_h, 173 le32_to_cpu(gpt_h->header_size)); 174 gpt_h->header_crc32 = cpu_to_le32(calc_crc32); 175 } 176 177 #if CONFIG_IS_ENABLED(EFI_PARTITION) 178 /* 179 * Public Functions (include/part.h) 180 */ 181 182 /* 183 * UUID is displayed as 32 hexadecimal digits, in 5 groups, 184 * separated by hyphens, in the form 8-4-4-4-12 for a total of 36 characters 185 */ 186 int get_disk_guid(struct blk_desc * dev_desc, char *guid) 187 { 188 ALLOC_CACHE_ALIGN_BUFFER_PAD(gpt_header, gpt_head, 1, dev_desc->blksz); 189 gpt_entry *gpt_pte = NULL; 190 unsigned char *guid_bin; 191 192 /* This function validates AND fills in the GPT header and PTE */ 193 if (is_gpt_valid(dev_desc, GPT_PRIMARY_PARTITION_TABLE_LBA, 194 gpt_head, &gpt_pte) != 1) { 195 printf("%s: *** ERROR: Invalid GPT ***\n", __func__); 196 if (is_gpt_valid(dev_desc, dev_desc->lba - 1, 197 gpt_head, &gpt_pte) != 1) { 198 printf("%s: *** ERROR: Invalid Backup GPT ***\n", 199 __func__); 200 return -EINVAL; 201 } else { 202 printf("%s: *** Using Backup GPT ***\n", 203 __func__); 204 } 205 } 206 207 guid_bin = gpt_head->disk_guid.b; 208 uuid_bin_to_str(guid_bin, guid, UUID_STR_FORMAT_GUID); 209 210 return 0; 211 } 212 213 void part_print_efi(struct blk_desc *dev_desc) 214 { 215 ALLOC_CACHE_ALIGN_BUFFER_PAD(gpt_header, gpt_head, 1, dev_desc->blksz); 216 gpt_entry *gpt_pte = NULL; 217 int i = 0; 218 char uuid[UUID_STR_LEN + 1]; 219 unsigned char *uuid_bin; 220 221 /* This function validates AND fills in the GPT header and PTE */ 222 if (is_gpt_valid(dev_desc, GPT_PRIMARY_PARTITION_TABLE_LBA, 223 gpt_head, &gpt_pte) != 1) { 224 printf("%s: *** ERROR: Invalid GPT ***\n", __func__); 225 if (is_gpt_valid(dev_desc, (dev_desc->lba - 1), 226 gpt_head, &gpt_pte) != 1) { 227 printf("%s: *** ERROR: Invalid Backup GPT ***\n", 228 __func__); 229 return; 230 } else { 231 printf("%s: *** Using Backup GPT ***\n", 232 __func__); 233 } 234 } 235 236 debug("%s: gpt-entry at %p\n", __func__, gpt_pte); 237 238 printf("Part\tStart LBA\tEnd LBA\t\tName\n"); 239 printf("\tAttributes\n"); 240 printf("\tType GUID\n"); 241 printf("\tPartition GUID\n"); 242 243 for (i = 0; i < le32_to_cpu(gpt_head->num_partition_entries); i++) { 244 /* Stop at the first non valid PTE */ 245 if (!is_pte_valid(&gpt_pte[i])) 246 break; 247 248 printf("%3d\t0x%08llx\t0x%08llx\t\"%s\"\n", (i + 1), 249 le64_to_cpu(gpt_pte[i].starting_lba), 250 le64_to_cpu(gpt_pte[i].ending_lba), 251 print_efiname(&gpt_pte[i])); 252 printf("\tattrs:\t0x%016llx\n", gpt_pte[i].attributes.raw); 253 uuid_bin = (unsigned char *)gpt_pte[i].partition_type_guid.b; 254 uuid_bin_to_str(uuid_bin, uuid, UUID_STR_FORMAT_GUID); 255 printf("\ttype:\t%s\n", uuid); 256 #ifdef CONFIG_PARTITION_TYPE_GUID 257 if (!uuid_guid_get_str(uuid_bin, uuid)) 258 printf("\ttype:\t%s\n", uuid); 259 #endif 260 uuid_bin = (unsigned char *)gpt_pte[i].unique_partition_guid.b; 261 uuid_bin_to_str(uuid_bin, uuid, UUID_STR_FORMAT_GUID); 262 printf("\tguid:\t%s\n", uuid); 263 } 264 265 /* Remember to free pte */ 266 free(gpt_pte); 267 return; 268 } 269 270 int part_get_info_efi(struct blk_desc *dev_desc, int part, 271 disk_partition_t *info) 272 { 273 static gpt_entry *gpt_pte = NULL; 274 static gpt_header *gpt_head = NULL; 275 276 if (!gpt_head) 277 gpt_head = memalign(ARCH_DMA_MINALIGN, dev_desc->blksz); 278 279 /* 280 * We suppose different dev have different size, eg. emmc vs sd 281 * free the pte first if exist and then will malloc and init a new one. 282 */ 283 if (gpt_head && (gpt_head->last_usable_lba + 0x22) != dev_desc->lba) { 284 if (gpt_pte) 285 free(gpt_pte); 286 gpt_pte = NULL; 287 } 288 289 /* "part" argument must be at least 1 */ 290 if (part < 1) { 291 printf("%s: Invalid Argument(s)\n", __func__); 292 return -1; 293 } 294 295 /* This function validates AND fills in the GPT header and PTE */ 296 if (is_gpt_valid(dev_desc, GPT_PRIMARY_PARTITION_TABLE_LBA, 297 gpt_head, &gpt_pte) != 1) { 298 printf("%s: *** ERROR: Invalid GPT ***\n", __func__); 299 if (is_gpt_valid(dev_desc, (dev_desc->lba - 1), 300 gpt_head, &gpt_pte) != 1) { 301 printf("%s: *** ERROR: Invalid Backup GPT ***\n", 302 __func__); 303 return -1; 304 } else { 305 printf("%s: *** Using Backup GPT ***\n", 306 __func__); 307 } 308 } 309 310 if (part > le32_to_cpu(gpt_head->num_partition_entries) || 311 !is_pte_valid(&gpt_pte[part - 1])) { 312 debug("%s: *** ERROR: Invalid partition number %d ***\n", 313 __func__, part); 314 return -1; 315 } 316 317 /* The 'lbaint_t' casting may limit the maximum disk size to 2 TB */ 318 info->start = (lbaint_t)le64_to_cpu(gpt_pte[part - 1].starting_lba); 319 /* The ending LBA is inclusive, to calculate size, add 1 to it */ 320 info->size = (lbaint_t)le64_to_cpu(gpt_pte[part - 1].ending_lba) + 1 321 - info->start; 322 info->blksz = dev_desc->blksz; 323 324 sprintf((char *)info->name, "%s", 325 print_efiname(&gpt_pte[part - 1])); 326 strcpy((char *)info->type, "U-Boot"); 327 info->bootable = is_bootable(&gpt_pte[part - 1]); 328 #if CONFIG_IS_ENABLED(PARTITION_UUIDS) 329 uuid_bin_to_str(gpt_pte[part - 1].unique_partition_guid.b, info->uuid, 330 UUID_STR_FORMAT_GUID); 331 #endif 332 #ifdef CONFIG_PARTITION_TYPE_GUID 333 uuid_bin_to_str(gpt_pte[part - 1].partition_type_guid.b, 334 info->type_guid, UUID_STR_FORMAT_GUID); 335 #endif 336 337 debug("%s: start 0x" LBAF ", size 0x" LBAF ", name %s\n", __func__, 338 info->start, info->size, info->name); 339 340 return 0; 341 } 342 343 #ifdef CONFIG_RKIMG_BOOTLOADER 344 #if defined(CONFIG_SPL_KERNEL_BOOT) || !defined(CONFIG_SPL_BUILD) 345 static void gpt_entry_modify(struct blk_desc *dev_desc, 346 gpt_entry *gpt_pte, 347 gpt_header *gpt_head) 348 { 349 int i; 350 uint32_t calc_crc32; 351 352 for (i = 0; i < gpt_head->num_partition_entries; i++) { 353 if (!is_pte_valid(&gpt_pte[i])) 354 break; 355 } 356 357 if (gpt_pte[i - 1].ending_lba <= (dev_desc->lba - 0x22)) 358 return; 359 360 gpt_pte[i - 1].ending_lba = dev_desc->lba - 0x22; 361 calc_crc32 = efi_crc32((const unsigned char *)gpt_pte, 362 le32_to_cpu(gpt_head->num_partition_entries) * 363 le32_to_cpu(gpt_head->sizeof_partition_entry)); 364 gpt_head->partition_entry_array_crc32 = calc_crc32; 365 } 366 367 static int part_efi_repair(struct blk_desc *dev_desc, gpt_entry *gpt_pte, 368 gpt_header *gpt_head, int head_gpt_valid, 369 int backup_gpt_valid) 370 { 371 uint32_t calc_crc32; 372 size_t count = 0, blk_cnt; 373 lbaint_t blk; 374 375 if (head_gpt_valid == 1 && backup_gpt_valid == 1) { 376 return 0; 377 } else if (head_gpt_valid == 0 && backup_gpt_valid == 0) { 378 return -1; 379 } else if (head_gpt_valid == 1 && backup_gpt_valid == 0) { 380 gpt_head->header_crc32 = 0; 381 gpt_head->my_lba = dev_desc->lba - 1; 382 gpt_head->alternate_lba = 1; 383 gpt_head->partition_entry_lba = dev_desc->lba - 0x21; 384 gpt_entry_modify(dev_desc, gpt_pte, gpt_head); 385 calc_crc32 = efi_crc32((const unsigned char *)gpt_head, 386 le32_to_cpu(gpt_head->header_size)); 387 gpt_head->header_crc32 = calc_crc32; 388 if (blk_dwrite(dev_desc, dev_desc->lba - 1, 1, gpt_head) != 1) { 389 printf("*** ERROR: Can't write GPT header ***\n"); 390 return -1; 391 } 392 count = le32_to_cpu(gpt_head->num_partition_entries) * 393 le32_to_cpu(gpt_head->sizeof_partition_entry); 394 blk = le64_to_cpu(gpt_head->partition_entry_lba); 395 blk_cnt = BLOCK_CNT(count, dev_desc); 396 if (blk_dwrite(dev_desc, blk, (lbaint_t)blk_cnt, gpt_pte) != 397 blk_cnt) { 398 printf("*** ERROR: Can't write entry partitions ***\n"); 399 return -1; 400 } 401 printf("Repair the backup gpt table OK!\n"); 402 } else if (head_gpt_valid == 0 && backup_gpt_valid == 1) { 403 gpt_head->header_crc32 = 0; 404 gpt_head->my_lba = 1; 405 gpt_head->alternate_lba = dev_desc->lba - 1; 406 gpt_head->partition_entry_lba = 0x22; 407 gpt_entry_modify(dev_desc, gpt_pte, gpt_head); 408 calc_crc32 = efi_crc32((const unsigned char *)gpt_head, 409 le32_to_cpu(gpt_head->header_size)); 410 gpt_head->header_crc32 = calc_crc32; 411 if (blk_dwrite(dev_desc, 1, 1, gpt_head) != 1) { 412 printf("*** ERROR: Can't write GPT header ***\n"); 413 return -1; 414 } 415 count = le32_to_cpu(gpt_head->num_partition_entries) * 416 le32_to_cpu(gpt_head->sizeof_partition_entry); 417 blk = le64_to_cpu(gpt_head->partition_entry_lba); 418 blk_cnt = BLOCK_CNT(count, dev_desc); 419 if (blk_dwrite(dev_desc, blk, (lbaint_t)blk_cnt, gpt_pte) != 420 blk_cnt) { 421 printf("*** ERROR: Can't write entry partitions ***\n"); 422 return -1; 423 } 424 printf("Repair the Primary gpt table OK!\n"); 425 } 426 427 return 0; 428 } 429 #endif 430 #endif 431 432 static int part_test_efi(struct blk_desc *dev_desc) 433 { 434 ALLOC_CACHE_ALIGN_BUFFER_PAD(legacy_mbr, legacymbr, 1, dev_desc->blksz); 435 int ret = 0; 436 437 /* Read legacy MBR from block 0 and validate it */ 438 if ((blk_dread(dev_desc, 0, 1, (ulong *)legacymbr) != 1) 439 || (is_pmbr_valid(legacymbr) != 1)) { 440 return -1; 441 } 442 #ifdef CONFIG_RKIMG_BOOTLOADER 443 #if defined(CONFIG_SPL_KERNEL_BOOT) || !defined(CONFIG_SPL_BUILD) 444 gpt_entry *h_gpt_pte = NULL; 445 gpt_header *h_gpt_head = NULL; 446 gpt_entry *b_gpt_pte = NULL; 447 gpt_header *b_gpt_head = NULL; 448 int head_gpt_valid = 0; 449 int backup_gpt_valid = 0; 450 451 if (!h_gpt_head) 452 h_gpt_head = memalign(ARCH_DMA_MINALIGN, dev_desc->blksz); 453 if (!b_gpt_head) 454 b_gpt_head = memalign(ARCH_DMA_MINALIGN, dev_desc->blksz); 455 456 head_gpt_valid = is_gpt_valid(dev_desc, GPT_PRIMARY_PARTITION_TABLE_LBA, 457 h_gpt_head, &h_gpt_pte); 458 backup_gpt_valid = is_gpt_valid(dev_desc, (dev_desc->lba - 1), 459 b_gpt_head, &b_gpt_pte); 460 if (head_gpt_valid == 1 && backup_gpt_valid == 0) { 461 if (part_efi_repair(dev_desc, h_gpt_pte, h_gpt_head, 462 head_gpt_valid, backup_gpt_valid)) 463 printf("Backup GPT repair fail!\n"); 464 } else if (head_gpt_valid == 0 && backup_gpt_valid == 1) { 465 if (part_efi_repair(dev_desc, b_gpt_pte, b_gpt_head, 466 head_gpt_valid, backup_gpt_valid)) 467 printf("Primary GPT repair fail!\n"); 468 } else if (head_gpt_valid == 0 && backup_gpt_valid == 0) { 469 ret = -1; 470 } 471 472 free(h_gpt_pte); 473 h_gpt_pte = NULL; 474 free(h_gpt_head); 475 h_gpt_head = NULL; 476 free(b_gpt_pte); 477 b_gpt_pte = NULL; 478 free(b_gpt_head); 479 b_gpt_head = NULL; 480 #endif 481 #endif 482 return ret; 483 } 484 485 /** 486 * set_protective_mbr(): Set the EFI protective MBR 487 * @param dev_desc - block device descriptor 488 * 489 * @return - zero on success, otherwise error 490 */ 491 static int set_protective_mbr(struct blk_desc *dev_desc) 492 { 493 /* Setup the Protective MBR */ 494 ALLOC_CACHE_ALIGN_BUFFER(legacy_mbr, p_mbr, 1); 495 memset(p_mbr, 0, sizeof(*p_mbr)); 496 497 if (p_mbr == NULL) { 498 printf("%s: calloc failed!\n", __func__); 499 return -1; 500 } 501 502 /* Read MBR to backup boot code if it exists */ 503 if (blk_dread(dev_desc, 0, 1, p_mbr) != 1) { 504 pr_err("** Can't read from device %d **\n", dev_desc->devnum); 505 return -1; 506 } 507 508 /* Append signature */ 509 p_mbr->signature = MSDOS_MBR_SIGNATURE; 510 p_mbr->partition_record[0].sys_ind = EFI_PMBR_OSTYPE_EFI_GPT; 511 p_mbr->partition_record[0].start_sect = 1; 512 p_mbr->partition_record[0].nr_sects = (u32) dev_desc->lba - 1; 513 514 /* Write MBR sector to the MMC device */ 515 if (blk_dwrite(dev_desc, 0, 1, p_mbr) != 1) { 516 printf("** Can't write to device %d **\n", 517 dev_desc->devnum); 518 return -1; 519 } 520 521 return 0; 522 } 523 524 int write_gpt_table(struct blk_desc *dev_desc, 525 gpt_header *gpt_h, gpt_entry *gpt_e) 526 { 527 const int pte_blk_cnt = BLOCK_CNT((gpt_h->num_partition_entries 528 * sizeof(gpt_entry)), dev_desc); 529 u32 calc_crc32; 530 531 debug("max lba: %x\n", (u32) dev_desc->lba); 532 /* Setup the Protective MBR */ 533 if (set_protective_mbr(dev_desc) < 0) 534 goto err; 535 536 /* Generate CRC for the Primary GPT Header */ 537 calc_crc32 = efi_crc32((const unsigned char *)gpt_e, 538 le32_to_cpu(gpt_h->num_partition_entries) * 539 le32_to_cpu(gpt_h->sizeof_partition_entry)); 540 gpt_h->partition_entry_array_crc32 = cpu_to_le32(calc_crc32); 541 542 calc_crc32 = efi_crc32((const unsigned char *)gpt_h, 543 le32_to_cpu(gpt_h->header_size)); 544 gpt_h->header_crc32 = cpu_to_le32(calc_crc32); 545 546 /* Write the First GPT to the block right after the Legacy MBR */ 547 if (blk_dwrite(dev_desc, 1, 1, gpt_h) != 1) 548 goto err; 549 550 if (blk_dwrite(dev_desc, le64_to_cpu(gpt_h->partition_entry_lba), 551 pte_blk_cnt, gpt_e) != pte_blk_cnt) 552 goto err; 553 554 prepare_backup_gpt_header(gpt_h); 555 556 if (blk_dwrite(dev_desc, (lbaint_t)le64_to_cpu(gpt_h->last_usable_lba) 557 + 1, pte_blk_cnt, gpt_e) != pte_blk_cnt) 558 goto err; 559 560 if (blk_dwrite(dev_desc, (lbaint_t)le64_to_cpu(gpt_h->my_lba), 1, 561 gpt_h) != 1) 562 goto err; 563 564 debug("GPT successfully written to block device!\n"); 565 return 0; 566 567 err: 568 printf("** Can't write to device %d **\n", dev_desc->devnum); 569 return -1; 570 } 571 572 int gpt_fill_pte(struct blk_desc *dev_desc, 573 gpt_header *gpt_h, gpt_entry *gpt_e, 574 disk_partition_t *partitions, int parts) 575 { 576 lbaint_t offset = (lbaint_t)le64_to_cpu(gpt_h->first_usable_lba); 577 lbaint_t last_usable_lba = (lbaint_t) 578 le64_to_cpu(gpt_h->last_usable_lba); 579 int i, k; 580 size_t efiname_len, dosname_len; 581 #if CONFIG_IS_ENABLED(PARTITION_UUIDS) 582 char *str_uuid; 583 unsigned char *bin_uuid; 584 #endif 585 #ifdef CONFIG_PARTITION_TYPE_GUID 586 char *str_type_guid; 587 unsigned char *bin_type_guid; 588 #endif 589 size_t hdr_start = gpt_h->my_lba; 590 size_t hdr_end = hdr_start + 1; 591 592 size_t pte_start = gpt_h->partition_entry_lba; 593 size_t pte_end = pte_start + 594 gpt_h->num_partition_entries * gpt_h->sizeof_partition_entry / 595 dev_desc->blksz; 596 597 for (i = 0; i < parts; i++) { 598 /* partition starting lba */ 599 lbaint_t start = partitions[i].start; 600 lbaint_t size = partitions[i].size; 601 602 if (start) { 603 offset = start + size; 604 } else { 605 start = offset; 606 offset += size; 607 } 608 609 /* 610 * If our partition overlaps with either the GPT 611 * header, or the partition entry, reject it. 612 */ 613 if (((start < hdr_end && hdr_start < (start + size)) || 614 (start < pte_end && pte_start < (start + size)))) { 615 printf("Partition overlap\n"); 616 return -1; 617 } 618 619 gpt_e[i].starting_lba = cpu_to_le64(start); 620 621 if (offset > (last_usable_lba + 1)) { 622 printf("Partitions layout exceds disk size\n"); 623 return -1; 624 } 625 /* partition ending lba */ 626 if ((i == parts - 1) && (size == 0)) 627 /* extend the last partition to maximuim */ 628 gpt_e[i].ending_lba = gpt_h->last_usable_lba; 629 else 630 gpt_e[i].ending_lba = cpu_to_le64(offset - 1); 631 632 #ifdef CONFIG_PARTITION_TYPE_GUID 633 str_type_guid = partitions[i].type_guid; 634 bin_type_guid = gpt_e[i].partition_type_guid.b; 635 if (strlen(str_type_guid)) { 636 if (uuid_str_to_bin(str_type_guid, bin_type_guid, 637 UUID_STR_FORMAT_GUID)) { 638 printf("Partition no. %d: invalid type guid: %s\n", 639 i, str_type_guid); 640 return -1; 641 } 642 } else { 643 /* default partition type GUID */ 644 memcpy(bin_type_guid, 645 &PARTITION_BASIC_DATA_GUID, 16); 646 } 647 #else 648 /* partition type GUID */ 649 memcpy(gpt_e[i].partition_type_guid.b, 650 &PARTITION_BASIC_DATA_GUID, 16); 651 #endif 652 653 #if CONFIG_IS_ENABLED(PARTITION_UUIDS) 654 str_uuid = partitions[i].uuid; 655 bin_uuid = gpt_e[i].unique_partition_guid.b; 656 657 if (uuid_str_to_bin(str_uuid, bin_uuid, UUID_STR_FORMAT_GUID)) { 658 printf("Partition no. %d: invalid guid: %s\n", 659 i, str_uuid); 660 return -1; 661 } 662 #endif 663 664 /* partition attributes */ 665 memset(&gpt_e[i].attributes, 0, 666 sizeof(gpt_entry_attributes)); 667 668 if (partitions[i].bootable) 669 gpt_e[i].attributes.fields.legacy_bios_bootable = 1; 670 671 /* partition name */ 672 efiname_len = sizeof(gpt_e[i].partition_name) 673 / sizeof(efi_char16_t); 674 dosname_len = sizeof(partitions[i].name); 675 676 memset(gpt_e[i].partition_name, 0, 677 sizeof(gpt_e[i].partition_name)); 678 679 for (k = 0; k < min(dosname_len, efiname_len); k++) 680 gpt_e[i].partition_name[k] = 681 (efi_char16_t)(partitions[i].name[k]); 682 683 debug("%s: name: %s offset[%d]: 0x" LBAF 684 " size[%d]: 0x" LBAF "\n", 685 __func__, partitions[i].name, i, 686 offset, i, size); 687 } 688 689 return 0; 690 } 691 692 static uint32_t partition_entries_offset(struct blk_desc *dev_desc) 693 { 694 uint32_t offset_blks = 2; 695 uint32_t __maybe_unused offset_bytes; 696 int __maybe_unused config_offset; 697 698 #if defined(CONFIG_EFI_PARTITION_ENTRIES_OFF) 699 /* 700 * Some architectures require their SPL loader at a fixed 701 * address within the first 16KB of the disk. To avoid an 702 * overlap with the partition entries of the EFI partition 703 * table, the first safe offset (in bytes, from the start of 704 * the disk) for the entries can be set in 705 * CONFIG_EFI_PARTITION_ENTRIES_OFF. 706 */ 707 offset_bytes = 708 PAD_TO_BLOCKSIZE(CONFIG_EFI_PARTITION_ENTRIES_OFF, dev_desc); 709 offset_blks = offset_bytes / dev_desc->blksz; 710 #endif 711 712 #if defined(CONFIG_OF_CONTROL) 713 /* 714 * Allow the offset of the first partition entires (in bytes 715 * from the start of the device) to be specified as a property 716 * of the device tree '/config' node. 717 */ 718 config_offset = fdtdec_get_config_int(gd->fdt_blob, 719 "u-boot,efi-partition-entries-offset", 720 -EINVAL); 721 if (config_offset != -EINVAL) { 722 offset_bytes = PAD_TO_BLOCKSIZE(config_offset, dev_desc); 723 offset_blks = offset_bytes / dev_desc->blksz; 724 } 725 #endif 726 727 debug("efi: partition entries offset (in blocks): %d\n", offset_blks); 728 729 /* 730 * The earliest LBA this can be at is LBA#2 (i.e. right behind 731 * the (protective) MBR and the GPT header. 732 */ 733 if (offset_blks < 2) 734 offset_blks = 2; 735 736 return offset_blks; 737 } 738 739 int gpt_fill_header(struct blk_desc *dev_desc, gpt_header *gpt_h, 740 char *str_guid, int parts_count) 741 { 742 gpt_h->signature = cpu_to_le64(GPT_HEADER_SIGNATURE); 743 gpt_h->revision = cpu_to_le32(GPT_HEADER_REVISION_V1); 744 gpt_h->header_size = cpu_to_le32(sizeof(gpt_header)); 745 gpt_h->my_lba = cpu_to_le64(1); 746 gpt_h->alternate_lba = cpu_to_le64(dev_desc->lba - 1); 747 gpt_h->last_usable_lba = cpu_to_le64(dev_desc->lba - 34); 748 gpt_h->partition_entry_lba = 749 cpu_to_le64(partition_entries_offset(dev_desc)); 750 gpt_h->first_usable_lba = 751 cpu_to_le64(le64_to_cpu(gpt_h->partition_entry_lba) + 32); 752 gpt_h->num_partition_entries = cpu_to_le32(GPT_ENTRY_NUMBERS); 753 gpt_h->sizeof_partition_entry = cpu_to_le32(sizeof(gpt_entry)); 754 gpt_h->header_crc32 = 0; 755 gpt_h->partition_entry_array_crc32 = 0; 756 757 if (uuid_str_to_bin(str_guid, gpt_h->disk_guid.b, UUID_STR_FORMAT_GUID)) 758 return -1; 759 760 return 0; 761 } 762 763 int gpt_restore(struct blk_desc *dev_desc, char *str_disk_guid, 764 disk_partition_t *partitions, int parts_count) 765 { 766 gpt_header *gpt_h; 767 gpt_entry *gpt_e; 768 int ret, size; 769 770 size = PAD_TO_BLOCKSIZE(sizeof(gpt_header), dev_desc); 771 gpt_h = malloc_cache_aligned(size); 772 if (gpt_h == NULL) { 773 printf("%s: calloc failed!\n", __func__); 774 return -1; 775 } 776 memset(gpt_h, 0, size); 777 778 size = PAD_TO_BLOCKSIZE(GPT_ENTRY_NUMBERS * sizeof(gpt_entry), 779 dev_desc); 780 gpt_e = malloc_cache_aligned(size); 781 if (gpt_e == NULL) { 782 printf("%s: calloc failed!\n", __func__); 783 free(gpt_h); 784 return -1; 785 } 786 memset(gpt_e, 0, size); 787 788 /* Generate Primary GPT header (LBA1) */ 789 ret = gpt_fill_header(dev_desc, gpt_h, str_disk_guid, parts_count); 790 if (ret) 791 goto err; 792 793 /* Generate partition entries */ 794 ret = gpt_fill_pte(dev_desc, gpt_h, gpt_e, partitions, parts_count); 795 if (ret) 796 goto err; 797 798 /* Write GPT partition table */ 799 ret = write_gpt_table(dev_desc, gpt_h, gpt_e); 800 801 err: 802 free(gpt_e); 803 free(gpt_h); 804 return ret; 805 } 806 807 static void gpt_convert_efi_name_to_char(char *s, efi_char16_t *es, int n) 808 { 809 char *ess = (char *)es; 810 int i, j; 811 812 memset(s, '\0', n); 813 814 for (i = 0, j = 0; j < n; i += 2, j++) { 815 s[j] = ess[i]; 816 if (!ess[i]) 817 return; 818 } 819 } 820 821 int gpt_verify_headers(struct blk_desc *dev_desc, gpt_header *gpt_head, 822 gpt_entry **gpt_pte) 823 { 824 /* 825 * This function validates AND 826 * fills in the GPT header and PTE 827 */ 828 if (is_gpt_valid(dev_desc, 829 GPT_PRIMARY_PARTITION_TABLE_LBA, 830 gpt_head, gpt_pte) != 1) { 831 printf("%s: *** ERROR: Invalid GPT ***\n", 832 __func__); 833 return -1; 834 } 835 if (is_gpt_valid(dev_desc, (dev_desc->lba - 1), 836 gpt_head, gpt_pte) != 1) { 837 printf("%s: *** ERROR: Invalid Backup GPT ***\n", 838 __func__); 839 return -1; 840 } 841 842 return 0; 843 } 844 845 int gpt_verify_partitions(struct blk_desc *dev_desc, 846 disk_partition_t *partitions, int parts, 847 gpt_header *gpt_head, gpt_entry **gpt_pte) 848 { 849 char efi_str[PARTNAME_SZ + 1]; 850 u64 gpt_part_size; 851 gpt_entry *gpt_e; 852 int ret, i; 853 854 ret = gpt_verify_headers(dev_desc, gpt_head, gpt_pte); 855 if (ret) 856 return ret; 857 858 gpt_e = *gpt_pte; 859 860 for (i = 0; i < parts; i++) { 861 if (i == gpt_head->num_partition_entries) { 862 pr_err("More partitions than allowed!\n"); 863 return -1; 864 } 865 866 /* Check if GPT and ENV partition names match */ 867 gpt_convert_efi_name_to_char(efi_str, gpt_e[i].partition_name, 868 PARTNAME_SZ + 1); 869 870 debug("%s: part: %2d name - GPT: %16s, ENV: %16s ", 871 __func__, i, efi_str, partitions[i].name); 872 873 if (strncmp(efi_str, (char *)partitions[i].name, 874 sizeof(partitions->name))) { 875 pr_err("Partition name: %s does not match %s!\n", 876 efi_str, (char *)partitions[i].name); 877 return -1; 878 } 879 880 /* Check if GPT and ENV sizes match */ 881 gpt_part_size = le64_to_cpu(gpt_e[i].ending_lba) - 882 le64_to_cpu(gpt_e[i].starting_lba) + 1; 883 debug("size(LBA) - GPT: %8llu, ENV: %8llu ", 884 (unsigned long long)gpt_part_size, 885 (unsigned long long)partitions[i].size); 886 887 if (le64_to_cpu(gpt_part_size) != partitions[i].size) { 888 /* We do not check the extend partition size */ 889 if ((i == parts - 1) && (partitions[i].size == 0)) 890 continue; 891 892 pr_err("Partition %s size: %llu does not match %llu!\n", 893 efi_str, (unsigned long long)gpt_part_size, 894 (unsigned long long)partitions[i].size); 895 return -1; 896 } 897 898 /* 899 * Start address is optional - check only if provided 900 * in '$partition' variable 901 */ 902 if (!partitions[i].start) { 903 debug("\n"); 904 continue; 905 } 906 907 /* Check if GPT and ENV start LBAs match */ 908 debug("start LBA - GPT: %8llu, ENV: %8llu\n", 909 le64_to_cpu(gpt_e[i].starting_lba), 910 (unsigned long long)partitions[i].start); 911 912 if (le64_to_cpu(gpt_e[i].starting_lba) != partitions[i].start) { 913 pr_err("Partition %s start: %llu does not match %llu!\n", 914 efi_str, le64_to_cpu(gpt_e[i].starting_lba), 915 (unsigned long long)partitions[i].start); 916 return -1; 917 } 918 } 919 920 return 0; 921 } 922 923 int is_valid_gpt_buf(struct blk_desc *dev_desc, void *buf) 924 { 925 gpt_header *gpt_h; 926 gpt_entry *gpt_e; 927 928 /* determine start of GPT Header in the buffer */ 929 gpt_h = buf + (GPT_PRIMARY_PARTITION_TABLE_LBA * 930 dev_desc->blksz); 931 932 if ((le64_to_cpu(gpt_h->alternate_lba) + 1) 933 != cpu_to_le64(dev_desc->lba)) { 934 printf("%s: failed checking '%s'\n", __func__, 935 "invalid GPT Disk Size"); 936 return -1; 937 } 938 939 if (validate_gpt_header(gpt_h, GPT_PRIMARY_PARTITION_TABLE_LBA, 940 dev_desc->lba)) 941 return -1; 942 943 /* determine start of GPT Entries in the buffer */ 944 gpt_e = buf + (le64_to_cpu(gpt_h->partition_entry_lba) * 945 dev_desc->blksz); 946 if (validate_gpt_entries(gpt_h, gpt_e)) 947 return -1; 948 949 return 0; 950 } 951 952 int write_mbr_and_gpt_partitions(struct blk_desc *dev_desc, void *buf) 953 { 954 gpt_header *gpt_h; 955 gpt_entry *gpt_e; 956 int gpt_e_blk_cnt; 957 lbaint_t lba; 958 int cnt; 959 960 if (is_valid_gpt_buf(dev_desc, buf)) 961 return -1; 962 963 /* determine start of GPT Header in the buffer */ 964 gpt_h = buf + (GPT_PRIMARY_PARTITION_TABLE_LBA * 965 dev_desc->blksz); 966 967 /* determine start of GPT Entries in the buffer */ 968 gpt_e = buf + (le64_to_cpu(gpt_h->partition_entry_lba) * 969 dev_desc->blksz); 970 gpt_e_blk_cnt = BLOCK_CNT((le32_to_cpu(gpt_h->num_partition_entries) * 971 le32_to_cpu(gpt_h->sizeof_partition_entry)), 972 dev_desc); 973 974 /* write MBR */ 975 lba = 0; /* MBR is always at 0 */ 976 cnt = 1; /* MBR (1 block) */ 977 if (blk_dwrite(dev_desc, lba, cnt, buf) != cnt) { 978 printf("%s: failed writing '%s' (%d blks at 0x" LBAF ")\n", 979 __func__, "MBR", cnt, lba); 980 return 1; 981 } 982 983 /* write Primary GPT */ 984 lba = GPT_PRIMARY_PARTITION_TABLE_LBA; 985 cnt = 1; /* GPT Header (1 block) */ 986 if (blk_dwrite(dev_desc, lba, cnt, gpt_h) != cnt) { 987 printf("%s: failed writing '%s' (%d blks at 0x" LBAF ")\n", 988 __func__, "Primary GPT Header", cnt, lba); 989 return 1; 990 } 991 992 lba = le64_to_cpu(gpt_h->partition_entry_lba); 993 cnt = gpt_e_blk_cnt; 994 if (blk_dwrite(dev_desc, lba, cnt, gpt_e) != cnt) { 995 printf("%s: failed writing '%s' (%d blks at 0x" LBAF ")\n", 996 __func__, "Primary GPT Entries", cnt, lba); 997 return 1; 998 } 999 1000 prepare_backup_gpt_header(gpt_h); 1001 1002 /* write Backup GPT */ 1003 lba = le64_to_cpu(gpt_h->partition_entry_lba); 1004 cnt = gpt_e_blk_cnt; 1005 if (blk_dwrite(dev_desc, lba, cnt, gpt_e) != cnt) { 1006 printf("%s: failed writing '%s' (%d blks at 0x" LBAF ")\n", 1007 __func__, "Backup GPT Entries", cnt, lba); 1008 return 1; 1009 } 1010 1011 lba = le64_to_cpu(gpt_h->my_lba); 1012 cnt = 1; /* GPT Header (1 block) */ 1013 if (blk_dwrite(dev_desc, lba, cnt, gpt_h) != cnt) { 1014 printf("%s: failed writing '%s' (%d blks at 0x" LBAF ")\n", 1015 __func__, "Backup GPT Header", cnt, lba); 1016 return 1; 1017 } 1018 1019 return 0; 1020 } 1021 #endif 1022 1023 /* 1024 * Private functions 1025 */ 1026 /* 1027 * pmbr_part_valid(): Check for EFI partition signature 1028 * 1029 * Returns: 1 if EFI GPT partition type is found. 1030 */ 1031 static int pmbr_part_valid(struct partition *part) 1032 { 1033 if (part->sys_ind == EFI_PMBR_OSTYPE_EFI_GPT && 1034 get_unaligned_le32(&part->start_sect) == 1UL) { 1035 return 1; 1036 } 1037 1038 return 0; 1039 } 1040 1041 /* 1042 * is_pmbr_valid(): test Protective MBR for validity 1043 * 1044 * Returns: 1 if PMBR is valid, 0 otherwise. 1045 * Validity depends on two things: 1046 * 1) MSDOS signature is in the last two bytes of the MBR 1047 * 2) One partition of type 0xEE is found, checked by pmbr_part_valid() 1048 */ 1049 static int is_pmbr_valid(legacy_mbr * mbr) 1050 { 1051 int i = 0; 1052 1053 if (!mbr || le16_to_cpu(mbr->signature) != MSDOS_MBR_SIGNATURE) 1054 return 0; 1055 1056 #ifdef CONFIG_ARCH_ROCKCHIP 1057 /* 1058 * In sd-update card, we use RKPARM partition in bootloader to load 1059 * firmware, and use MS-DOS partition in recovery to update system. 1060 * Now, we want to use gpt in bootloader and abandon the RKPARM 1061 * partition. So in new sd-update card, we write the MS-DOS partition 1062 * table and gpt to sd card. Then we must return 1 directly when test 1063 * the mbr sector otherwise the gpt is unavailable. 1064 */ 1065 return 1; 1066 #endif 1067 for (i = 0; i < 4; i++) { 1068 if (pmbr_part_valid(&mbr->partition_record[i])) { 1069 return 1; 1070 } 1071 } 1072 return 0; 1073 } 1074 1075 /** 1076 * is_gpt_valid() - tests one GPT header and PTEs for validity 1077 * 1078 * lba is the logical block address of the GPT header to test 1079 * gpt is a GPT header ptr, filled on return. 1080 * ptes is a PTEs ptr, filled on return. 1081 * 1082 * Description: returns 1 if valid, 0 on error. 1083 * If valid, returns pointers to PTEs. 1084 */ 1085 static int is_gpt_valid(struct blk_desc *dev_desc, u64 lba, 1086 gpt_header *pgpt_head, gpt_entry **pgpt_pte) 1087 { 1088 /* Confirm valid arguments prior to allocation. */ 1089 if (!dev_desc || !pgpt_head) { 1090 printf("%s: Invalid Argument(s)\n", __func__); 1091 return 0; 1092 } 1093 1094 /* Re-use pte if it's not NULL */ 1095 if (*pgpt_pte) 1096 return 1; 1097 1098 ALLOC_CACHE_ALIGN_BUFFER(legacy_mbr, mbr, dev_desc->blksz); 1099 1100 /* Read MBR Header from device */ 1101 if (blk_dread(dev_desc, 0, 1, (ulong *)mbr) != 1) { 1102 printf("*** ERROR: Can't read MBR header ***\n"); 1103 return 0; 1104 } 1105 1106 /* Read GPT Header from device */ 1107 if (blk_dread(dev_desc, (lbaint_t)lba, 1, pgpt_head) != 1) { 1108 printf("*** ERROR: Can't read GPT header ***\n"); 1109 return 0; 1110 } 1111 1112 if (validate_gpt_header(pgpt_head, (lbaint_t)lba, dev_desc->lba)) 1113 return 0; 1114 1115 if (dev_desc->sig_type == SIG_TYPE_NONE) { 1116 efi_guid_t empty = {}; 1117 if (memcmp(&pgpt_head->disk_guid, &empty, sizeof(empty))) { 1118 dev_desc->sig_type = SIG_TYPE_GUID; 1119 memcpy(&dev_desc->guid_sig, &pgpt_head->disk_guid, 1120 sizeof(empty)); 1121 } else if (mbr->unique_mbr_signature != 0) { 1122 dev_desc->sig_type = SIG_TYPE_MBR; 1123 dev_desc->mbr_sig = mbr->unique_mbr_signature; 1124 } 1125 } 1126 1127 /* Read and allocate Partition Table Entries */ 1128 *pgpt_pte = alloc_read_gpt_entries(dev_desc, pgpt_head); 1129 if (*pgpt_pte == NULL) { 1130 printf("GPT: Failed to allocate memory for PTE\n"); 1131 return 0; 1132 } 1133 1134 if (validate_gpt_entries(pgpt_head, *pgpt_pte)) { 1135 free(*pgpt_pte); 1136 *pgpt_pte = NULL; 1137 return 0; 1138 } 1139 1140 /* We're done, all's well */ 1141 return 1; 1142 } 1143 1144 /** 1145 * alloc_read_gpt_entries(): reads partition entries from disk 1146 * @dev_desc 1147 * @gpt - GPT header 1148 * 1149 * Description: Returns ptes on success, NULL on error. 1150 * Allocates space for PTEs based on information found in @gpt. 1151 * Notes: remember to free pte when you're done! 1152 */ 1153 static gpt_entry *alloc_read_gpt_entries(struct blk_desc *dev_desc, 1154 gpt_header *pgpt_head) 1155 { 1156 size_t count = 0, blk_cnt; 1157 lbaint_t blk; 1158 gpt_entry *pte = NULL; 1159 1160 if (!dev_desc || !pgpt_head) { 1161 printf("%s: Invalid Argument(s)\n", __func__); 1162 return NULL; 1163 } 1164 1165 count = le32_to_cpu(pgpt_head->num_partition_entries) * 1166 le32_to_cpu(pgpt_head->sizeof_partition_entry); 1167 1168 debug("%s: count = %u * %u = %lu\n", __func__, 1169 (u32) le32_to_cpu(pgpt_head->num_partition_entries), 1170 (u32) le32_to_cpu(pgpt_head->sizeof_partition_entry), 1171 (ulong)count); 1172 1173 /* Allocate memory for PTE, remember to FREE */ 1174 if (count != 0) { 1175 pte = memalign(ARCH_DMA_MINALIGN, 1176 PAD_TO_BLOCKSIZE(count, dev_desc)); 1177 } 1178 1179 if (count == 0 || pte == NULL) { 1180 printf("%s: ERROR: Can't allocate %#lX bytes for GPT Entries\n", 1181 __func__, (ulong)count); 1182 return NULL; 1183 } 1184 1185 /* Read GPT Entries from device */ 1186 blk = le64_to_cpu(pgpt_head->partition_entry_lba); 1187 blk_cnt = BLOCK_CNT(count, dev_desc); 1188 if (blk_dread(dev_desc, blk, (lbaint_t)blk_cnt, pte) != blk_cnt) { 1189 printf("*** ERROR: Can't read GPT Entries ***\n"); 1190 free(pte); 1191 return NULL; 1192 } 1193 return pte; 1194 } 1195 1196 /** 1197 * is_pte_valid(): validates a single Partition Table Entry 1198 * @gpt_entry - Pointer to a single Partition Table Entry 1199 * 1200 * Description: returns 1 if valid, 0 on error. 1201 */ 1202 static int is_pte_valid(gpt_entry * pte) 1203 { 1204 efi_guid_t unused_guid; 1205 1206 if (!pte) { 1207 printf("%s: Invalid Argument(s)\n", __func__); 1208 return 0; 1209 } 1210 1211 /* Only one validation for now: 1212 * The GUID Partition Type != Unused Entry (ALL-ZERO) 1213 */ 1214 memset(unused_guid.b, 0, sizeof(unused_guid.b)); 1215 1216 if (memcmp(pte->partition_type_guid.b, unused_guid.b, 1217 sizeof(unused_guid.b)) == 0) { 1218 1219 debug("%s: Found an unused PTE GUID at 0x%08X\n", __func__, 1220 (unsigned int)(uintptr_t)pte); 1221 1222 return 0; 1223 } else { 1224 return 1; 1225 } 1226 } 1227 1228 /* 1229 * Add an 'a_' prefix so it comes before 'dos' in the linker list. We need to 1230 * check EFI first, since a DOS partition is often used as a 'protective MBR' 1231 * with EFI. 1232 */ 1233 U_BOOT_PART_TYPE(a_efi) = { 1234 .name = "EFI", 1235 .part_type = PART_TYPE_EFI, 1236 .max_entries = GPT_ENTRY_NUMBERS, 1237 .get_info = part_get_info_ptr(part_get_info_efi), 1238 .print = part_print_ptr(part_print_efi), 1239 .test = part_test_efi, 1240 }; 1241 #endif 1242