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 #define FACTORY_UNKNOWN_LBA (0xffffffff - 34) 76 static int validate_gpt_header(gpt_header *gpt_h, lbaint_t lba, 77 lbaint_t lastlba) 78 { 79 uint32_t crc32_backup = 0; 80 uint32_t calc_crc32; 81 82 /* Check the GPT header signature */ 83 if (le64_to_cpu(gpt_h->signature) != GPT_HEADER_SIGNATURE) { 84 if (le64_to_cpu(gpt_h->signature) != 0) 85 printf("%s signature is wrong: 0x%llX != 0x%llX\n", 86 "GUID Partition Table Header", 87 le64_to_cpu(gpt_h->signature), 88 GPT_HEADER_SIGNATURE); 89 return -1; 90 } 91 92 /* Check the GUID Partition Table CRC */ 93 memcpy(&crc32_backup, &gpt_h->header_crc32, sizeof(crc32_backup)); 94 memset(&gpt_h->header_crc32, 0, sizeof(gpt_h->header_crc32)); 95 96 calc_crc32 = efi_crc32((const unsigned char *)gpt_h, 97 le32_to_cpu(gpt_h->header_size)); 98 99 memcpy(&gpt_h->header_crc32, &crc32_backup, sizeof(crc32_backup)); 100 101 if (calc_crc32 != le32_to_cpu(crc32_backup)) { 102 printf("%s CRC is wrong: 0x%x != 0x%x\n", 103 "GUID Partition Table Header", 104 le32_to_cpu(crc32_backup), calc_crc32); 105 return -1; 106 } 107 108 /* 109 * Check that the my_lba entry points to the LBA that contains the GPT 110 */ 111 if (le64_to_cpu(gpt_h->my_lba) != lba) { 112 printf("GPT: my_lba incorrect: %llX != " LBAF "\n", 113 le64_to_cpu(gpt_h->my_lba), 114 lba); 115 return -1; 116 } 117 118 /* 119 * Check that the first_usable_lba and that the last_usable_lba are 120 * within the disk. 121 */ 122 if (le64_to_cpu(gpt_h->first_usable_lba) > lastlba) { 123 printf("GPT: first_usable_lba incorrect: %llX > " LBAF "\n", 124 le64_to_cpu(gpt_h->first_usable_lba), lastlba); 125 return -1; 126 } 127 if (le64_to_cpu(gpt_h->last_usable_lba) > lastlba) { 128 if (le64_to_cpu(gpt_h->last_usable_lba) == FACTORY_UNKNOWN_LBA) { 129 #ifdef CONFIG_SPL_BUILD 130 printf("GPT: SPL workaround factory last_usable_lba\n"); 131 gpt_h->last_usable_lba = lastlba - 34; 132 return 0; 133 #else 134 printf("GPT: last_usable_lba need repair\n"); 135 return 0; 136 #endif 137 } 138 printf("GPT: last_usable_lba incorrect: %llX > " LBAF "\n", 139 le64_to_cpu(gpt_h->last_usable_lba), lastlba); 140 return -1; 141 } 142 143 debug("GPT: first_usable_lba: %llX last_usable_lba: %llX last lba: " 144 LBAF "\n", le64_to_cpu(gpt_h->first_usable_lba), 145 le64_to_cpu(gpt_h->last_usable_lba), lastlba); 146 147 return 0; 148 } 149 150 static int validate_gpt_entries(gpt_header *gpt_h, gpt_entry *gpt_e) 151 { 152 uint32_t calc_crc32; 153 154 /* Check the GUID Partition Table Entry Array CRC */ 155 calc_crc32 = efi_crc32((const unsigned char *)gpt_e, 156 le32_to_cpu(gpt_h->num_partition_entries) * 157 le32_to_cpu(gpt_h->sizeof_partition_entry)); 158 159 if (calc_crc32 != le32_to_cpu(gpt_h->partition_entry_array_crc32)) { 160 printf("%s: 0x%x != 0x%x\n", 161 "GUID Partition Table Entry Array CRC is wrong", 162 le32_to_cpu(gpt_h->partition_entry_array_crc32), 163 calc_crc32); 164 return -1; 165 } 166 167 return 0; 168 } 169 170 static void prepare_backup_gpt_header(gpt_header *gpt_h) 171 { 172 uint32_t calc_crc32; 173 uint64_t val; 174 175 /* recalculate the values for the Backup GPT Header */ 176 val = le64_to_cpu(gpt_h->my_lba); 177 gpt_h->my_lba = gpt_h->alternate_lba; 178 gpt_h->alternate_lba = cpu_to_le64(val); 179 gpt_h->partition_entry_lba = 180 cpu_to_le64(le64_to_cpu(gpt_h->last_usable_lba) + 1); 181 gpt_h->header_crc32 = 0; 182 183 calc_crc32 = efi_crc32((const unsigned char *)gpt_h, 184 le32_to_cpu(gpt_h->header_size)); 185 gpt_h->header_crc32 = cpu_to_le32(calc_crc32); 186 } 187 188 #if CONFIG_IS_ENABLED(EFI_PARTITION) 189 /* 190 * Public Functions (include/part.h) 191 */ 192 193 /* 194 * UUID is displayed as 32 hexadecimal digits, in 5 groups, 195 * separated by hyphens, in the form 8-4-4-4-12 for a total of 36 characters 196 */ 197 int get_disk_guid(struct blk_desc * dev_desc, char *guid) 198 { 199 ALLOC_CACHE_ALIGN_BUFFER_PAD(gpt_header, gpt_head, 1, dev_desc->rawblksz); 200 gpt_entry *gpt_pte = NULL; 201 unsigned char *guid_bin; 202 203 /* This function validates AND fills in the GPT header and PTE */ 204 if (is_gpt_valid(dev_desc, GPT_PRIMARY_PARTITION_TABLE_LBA, 205 gpt_head, &gpt_pte) != 1) { 206 printf("%s: *** ERROR: Invalid GPT ***\n", __func__); 207 if (is_gpt_valid(dev_desc, dev_desc->rawlba - 1, 208 gpt_head, &gpt_pte) != 1) { 209 printf("%s: *** ERROR: Invalid Backup GPT ***\n", 210 __func__); 211 return -EINVAL; 212 } else { 213 printf("%s: *** Using Backup GPT ***\n", 214 __func__); 215 } 216 } 217 218 guid_bin = gpt_head->disk_guid.b; 219 uuid_bin_to_str(guid_bin, guid, UUID_STR_FORMAT_GUID); 220 221 return 0; 222 } 223 224 void part_print_efi(struct blk_desc *dev_desc) 225 { 226 ALLOC_CACHE_ALIGN_BUFFER_PAD(gpt_header, gpt_head, 1, dev_desc->rawblksz); 227 gpt_entry *gpt_pte = NULL; 228 int i = 0; 229 char uuid[UUID_STR_LEN + 1]; 230 unsigned char *uuid_bin; 231 int sector; 232 233 /* This function validates AND fills in the GPT header and PTE */ 234 if (is_gpt_valid(dev_desc, GPT_PRIMARY_PARTITION_TABLE_LBA, 235 gpt_head, &gpt_pte) != 1) { 236 printf("%s: *** ERROR: Invalid GPT ***\n", __func__); 237 if (is_gpt_valid(dev_desc, (dev_desc->rawlba - 1), 238 gpt_head, &gpt_pte) != 1) { 239 printf("%s: *** ERROR: Invalid Backup GPT ***\n", 240 __func__); 241 return; 242 } else { 243 printf("%s: *** Using Backup GPT ***\n", 244 __func__); 245 } 246 } 247 248 debug("%s: gpt-entry at %p\n", __func__, gpt_pte); 249 250 printf("Part\tStart LBA\tEnd LBA\t\tName\n"); 251 printf("\tAttributes\n"); 252 printf("\tType GUID\n"); 253 printf("\tPartition GUID\n"); 254 255 sector = dev_desc->rawblksz / dev_desc->blksz; 256 for (i = 0; i < le32_to_cpu(gpt_head->num_partition_entries); i++) { 257 /* Stop at the first non valid PTE */ 258 if (!is_pte_valid(&gpt_pte[i])) 259 break; 260 261 printf("%3d\t0x%08llx\t0x%08llx\t\"%s\"\n", (i + 1), 262 le64_to_cpu(gpt_pte[i].starting_lba * sector), 263 le64_to_cpu(gpt_pte[i].ending_lba * sector + sector - 1), 264 print_efiname(&gpt_pte[i])); 265 printf("\tattrs:\t0x%016llx\n", gpt_pte[i].attributes.raw); 266 uuid_bin = (unsigned char *)gpt_pte[i].partition_type_guid.b; 267 uuid_bin_to_str(uuid_bin, uuid, UUID_STR_FORMAT_GUID); 268 printf("\ttype:\t%s\n", uuid); 269 #ifdef CONFIG_PARTITION_TYPE_GUID 270 if (!uuid_guid_get_str(uuid_bin, uuid)) 271 printf("\ttype:\t%s\n", uuid); 272 #endif 273 uuid_bin = (unsigned char *)gpt_pte[i].unique_partition_guid.b; 274 uuid_bin_to_str(uuid_bin, uuid, UUID_STR_FORMAT_GUID); 275 printf("\tguid:\t%s\n", uuid); 276 } 277 278 /* Remember to free pte */ 279 free(gpt_pte); 280 return; 281 } 282 283 int part_get_info_efi(struct blk_desc *dev_desc, int part, 284 disk_partition_t *info) 285 { 286 static gpt_entry *gpt_pte = NULL; 287 static gpt_header *gpt_head = NULL; 288 int sector, b_gpt_nsec = 0x22; 289 290 if (!dev_desc->rawblksz || !dev_desc->rawlba) { 291 dev_desc->rawblksz = dev_desc->blksz; 292 dev_desc->rawlba = dev_desc->lba; 293 } 294 295 if (dev_desc->rawblksz == 4096) 296 b_gpt_nsec = 6; 297 298 if (!gpt_head) 299 gpt_head = memalign(ARCH_DMA_MINALIGN, dev_desc->rawblksz); 300 301 /* 302 * We suppose different dev have different size, eg. emmc vs sd 303 * free the pte first if exist and then will malloc and init a new one. 304 */ 305 if (gpt_head && (gpt_head->last_usable_lba + b_gpt_nsec) != dev_desc->rawlba) { 306 if (dev_desc->rawblksz == 4096) { 307 /* realloc gpt header buffer */ 308 free(gpt_head); 309 gpt_head = memalign(ARCH_DMA_MINALIGN, dev_desc->rawblksz); 310 } 311 if (gpt_pte) 312 free(gpt_pte); 313 gpt_pte = NULL; 314 } 315 316 /* "part" argument must be at least 1 */ 317 if (part < 1) { 318 printf("%s: Invalid Argument(s)\n", __func__); 319 return -1; 320 } 321 322 /* This function validates AND fills in the GPT header and PTE */ 323 if (is_gpt_valid(dev_desc, GPT_PRIMARY_PARTITION_TABLE_LBA, 324 gpt_head, &gpt_pte) != 1) { 325 printf("%s: *** ERROR: Invalid GPT ***\n", __func__); 326 if (is_gpt_valid(dev_desc, (dev_desc->rawlba - 1), 327 gpt_head, &gpt_pte) != 1) { 328 printf("%s: *** ERROR: Invalid Backup GPT ***\n", 329 __func__); 330 return -1; 331 } else { 332 printf("%s: *** Using Backup GPT ***\n", 333 __func__); 334 } 335 } 336 337 if (part > le32_to_cpu(gpt_head->num_partition_entries) || 338 !is_pte_valid(&gpt_pte[part - 1])) { 339 debug("%s: *** ERROR: Invalid partition number %d ***\n", 340 __func__, part); 341 return -1; 342 } 343 344 sector = dev_desc->rawblksz / dev_desc->blksz; 345 /* The 'lbaint_t' casting may limit the maximum disk size to 2 TB */ 346 info->start = (lbaint_t)le64_to_cpu(gpt_pte[part - 1].starting_lba); 347 /* The ending LBA is inclusive, to calculate size, add 1 to it */ 348 info->size = (lbaint_t)le64_to_cpu(gpt_pte[part - 1].ending_lba) + 1 349 - info->start; 350 info->start *= sector; 351 info->size *= sector; 352 353 info->blksz = dev_desc->blksz; 354 355 sprintf((char *)info->name, "%s", 356 print_efiname(&gpt_pte[part - 1])); 357 strcpy((char *)info->type, "U-Boot"); 358 info->bootable = is_bootable(&gpt_pte[part - 1]); 359 #if CONFIG_IS_ENABLED(PARTITION_UUIDS) 360 uuid_bin_to_str(gpt_pte[part - 1].unique_partition_guid.b, info->uuid, 361 UUID_STR_FORMAT_GUID); 362 #endif 363 #ifdef CONFIG_PARTITION_TYPE_GUID 364 uuid_bin_to_str(gpt_pte[part - 1].partition_type_guid.b, 365 info->type_guid, UUID_STR_FORMAT_GUID); 366 #endif 367 368 debug("%s: start 0x" LBAF ", size 0x" LBAF ", name %s\n", __func__, 369 info->start, info->size, info->name); 370 371 return 0; 372 } 373 374 #ifdef CONFIG_RKIMG_BOOTLOADER 375 #if defined(CONFIG_SPL_KERNEL_BOOT) || !defined(CONFIG_SPL_BUILD) 376 static void gpt_entry_modify(struct blk_desc *dev_desc, 377 gpt_entry *gpt_pte, 378 gpt_header *gpt_head) 379 { 380 int i; 381 uint32_t calc_crc32; 382 383 for (i = 0; i < gpt_head->num_partition_entries; i++) { 384 if (!is_pte_valid(&gpt_pte[i])) 385 break; 386 } 387 if (dev_desc->rawblksz == 4096) { 388 if (gpt_pte[i - 1].ending_lba <= (dev_desc->rawlba - 6)) 389 return; 390 gpt_pte[i - 1].ending_lba = dev_desc->rawlba - 6; 391 } else { 392 if (gpt_pte[i - 1].ending_lba <= (dev_desc->rawlba - 0x22)) 393 return; 394 /* The last partition size need align to 4KB, here align to 32KB. */ 395 gpt_pte[i - 1].ending_lba = dev_desc->rawlba - 0x41; 396 } 397 calc_crc32 = efi_crc32((const unsigned char *)gpt_pte, 398 le32_to_cpu(gpt_head->num_partition_entries) * 399 le32_to_cpu(gpt_head->sizeof_partition_entry)); 400 gpt_head->partition_entry_array_crc32 = calc_crc32; 401 } 402 403 static int part_efi_repair(struct blk_desc *dev_desc, gpt_entry *gpt_pte, 404 gpt_header *gpt_head, int head_gpt_valid, 405 int backup_gpt_valid) 406 { 407 uint32_t calc_crc32; 408 size_t count = 0, blk_cnt; 409 lbaint_t blk; 410 int sector = dev_desc->rawblksz / dev_desc->blksz; 411 412 if (head_gpt_valid == 1 && backup_gpt_valid == 1) { 413 return 0; 414 } else if (head_gpt_valid == 0 && backup_gpt_valid == 0) { 415 return -1; 416 } else if (head_gpt_valid == 1 && backup_gpt_valid == 0) { 417 gpt_head->header_crc32 = 0; 418 gpt_head->my_lba = dev_desc->rawlba - 1; 419 gpt_head->alternate_lba = 1; 420 if (sector == 8) { 421 gpt_head->partition_entry_lba = dev_desc->rawlba - 5; 422 gpt_head->last_usable_lba = cpu_to_le64(dev_desc->rawlba - 6); 423 } else { 424 gpt_head->partition_entry_lba = dev_desc->rawlba - 0x21; 425 gpt_head->last_usable_lba = cpu_to_le64(dev_desc->rawlba - 34); 426 } 427 gpt_entry_modify(dev_desc, gpt_pte, gpt_head); 428 calc_crc32 = efi_crc32((const unsigned char *)gpt_head, 429 le32_to_cpu(gpt_head->header_size)); 430 gpt_head->header_crc32 = calc_crc32; 431 blk = le64_to_cpu(dev_desc->rawlba - 1); 432 if (blk_dwrite(dev_desc, blk * sector, sector, gpt_head) != sector) { 433 printf("*** ERROR: Can't write GPT header ***\n"); 434 return -1; 435 } 436 count = le32_to_cpu(gpt_head->num_partition_entries) * 437 le32_to_cpu(gpt_head->sizeof_partition_entry); 438 blk = le64_to_cpu(gpt_head->partition_entry_lba); 439 blk_cnt = BLOCK_CNT(count, dev_desc); 440 if (blk_dwrite(dev_desc, blk * sector, (lbaint_t)blk_cnt, gpt_pte) != 441 blk_cnt) { 442 printf("*** ERROR: Can't write entry partitions ***\n"); 443 return -1; 444 } 445 printf("Repair the backup gpt table OK!\n"); 446 } else if (head_gpt_valid == 0 && backup_gpt_valid == 1) { 447 gpt_head->header_crc32 = 0; 448 gpt_head->my_lba = 1; 449 gpt_head->alternate_lba = dev_desc->rawlba - 1; 450 gpt_head->partition_entry_lba = 0x2; 451 if (sector == 8) { 452 gpt_head->last_usable_lba = cpu_to_le64(dev_desc->rawlba - 6); 453 } else { 454 gpt_head->last_usable_lba = cpu_to_le64(dev_desc->rawlba - 34); 455 } 456 gpt_entry_modify(dev_desc, gpt_pte, gpt_head); 457 calc_crc32 = efi_crc32((const unsigned char *)gpt_head, 458 le32_to_cpu(gpt_head->header_size)); 459 gpt_head->header_crc32 = calc_crc32; 460 if (blk_dwrite(dev_desc, 1 * sector, sector, gpt_head) != sector) { 461 printf("*** ERROR: Can't write GPT header ***\n"); 462 return -1; 463 } 464 count = le32_to_cpu(gpt_head->num_partition_entries) * 465 le32_to_cpu(gpt_head->sizeof_partition_entry); 466 blk = le64_to_cpu(gpt_head->partition_entry_lba); 467 blk_cnt = BLOCK_CNT(count, dev_desc); 468 if (blk_dwrite(dev_desc, blk * sector, (lbaint_t)blk_cnt, gpt_pte) != 469 blk_cnt) { 470 printf("*** ERROR: Can't write entry partitions ***\n"); 471 return -1; 472 } 473 printf("Repair the Primary gpt table OK!\n"); 474 } 475 476 return 0; 477 } 478 #endif 479 #endif 480 481 static int part_test_efi(struct blk_desc *dev_desc) 482 { 483 int ret = 0; 484 485 if (!dev_desc->rawblksz || !dev_desc->rawlba) { 486 dev_desc->rawblksz = dev_desc->blksz; 487 dev_desc->rawlba = dev_desc->lba; 488 } 489 490 ALLOC_CACHE_ALIGN_BUFFER_PAD(legacy_mbr, legacymbr, 1, dev_desc->rawblksz); 491 492 /* Read legacy MBR from block 0 and validate it */ 493 if ((blk_dread(dev_desc, 0, 1, (ulong *)legacymbr) != 1) 494 || (is_pmbr_valid(legacymbr) != 1)) { 495 return -1; 496 } 497 #ifdef CONFIG_RKIMG_BOOTLOADER 498 #if defined(CONFIG_SPL_KERNEL_BOOT) || !defined(CONFIG_SPL_BUILD) 499 gpt_entry *h_gpt_pte = NULL; 500 gpt_header *h_gpt_head = NULL; 501 gpt_entry *b_gpt_pte = NULL; 502 gpt_header *b_gpt_head = NULL; 503 int head_gpt_valid = 0; 504 int backup_gpt_valid = 0; 505 506 if (!h_gpt_head) 507 h_gpt_head = memalign(ARCH_DMA_MINALIGN, dev_desc->rawblksz); 508 if (!b_gpt_head) 509 b_gpt_head = memalign(ARCH_DMA_MINALIGN, dev_desc->rawblksz); 510 511 head_gpt_valid = is_gpt_valid(dev_desc, GPT_PRIMARY_PARTITION_TABLE_LBA, 512 h_gpt_head, &h_gpt_pte); 513 backup_gpt_valid = is_gpt_valid(dev_desc, (dev_desc->rawlba - 1), 514 b_gpt_head, &b_gpt_pte); 515 516 if ((head_gpt_valid == 1) && 517 (le64_to_cpu(h_gpt_head->last_usable_lba) 518 == FACTORY_UNKNOWN_LBA)) { 519 if (part_efi_repair(dev_desc, h_gpt_pte, h_gpt_head, 520 0, 1)) 521 printf("Primary GPT repair fail!\n"); 522 /* Force repair backup GPT for factory or ota upgrade. */ 523 backup_gpt_valid = 0; 524 } 525 526 if (head_gpt_valid == 1 && backup_gpt_valid == 0) { 527 if (part_efi_repair(dev_desc, h_gpt_pte, h_gpt_head, 528 head_gpt_valid, backup_gpt_valid)) 529 printf("Backup GPT repair fail!\n"); 530 } else if (head_gpt_valid == 0 && backup_gpt_valid == 1) { 531 if (part_efi_repair(dev_desc, b_gpt_pte, b_gpt_head, 532 head_gpt_valid, backup_gpt_valid)) 533 printf("Primary GPT repair fail!\n"); 534 } else if (head_gpt_valid == 0 && backup_gpt_valid == 0) { 535 ret = -1; 536 } 537 538 free(h_gpt_pte); 539 h_gpt_pte = NULL; 540 free(h_gpt_head); 541 h_gpt_head = NULL; 542 free(b_gpt_pte); 543 b_gpt_pte = NULL; 544 free(b_gpt_head); 545 b_gpt_head = NULL; 546 #endif 547 #endif 548 return ret; 549 } 550 551 /** 552 * set_protective_mbr(): Set the EFI protective MBR 553 * @param dev_desc - block device descriptor 554 * 555 * @return - zero on success, otherwise error 556 */ 557 static int set_protective_mbr(struct blk_desc *dev_desc) 558 { 559 /* Setup the Protective MBR */ 560 ALLOC_CACHE_ALIGN_BUFFER_PAD(legacy_mbr, p_mbr, 1, dev_desc->rawblksz); 561 memset(p_mbr, 0, dev_desc->rawblksz); 562 563 if (p_mbr == NULL) { 564 printf("%s: calloc failed!\n", __func__); 565 return -1; 566 } 567 568 /* Read MBR to backup boot code if it exists */ 569 if (blk_dread(dev_desc, 0, 1, p_mbr) != 1) { 570 pr_err("** Can't read from device %d **\n", dev_desc->devnum); 571 return -1; 572 } 573 574 /* Append signature */ 575 p_mbr->signature = MSDOS_MBR_SIGNATURE; 576 p_mbr->partition_record[0].sys_ind = EFI_PMBR_OSTYPE_EFI_GPT; 577 p_mbr->partition_record[0].start_sect = 1; 578 p_mbr->partition_record[0].nr_sects = (u32) dev_desc->rawlba - 1; 579 580 /* Write MBR sector to the MMC device */ 581 if (blk_dwrite(dev_desc, 0, 1, p_mbr) != 1) { 582 printf("** Can't write to device %d **\n", 583 dev_desc->devnum); 584 return -1; 585 } 586 587 return 0; 588 } 589 590 int write_gpt_table(struct blk_desc *dev_desc, 591 gpt_header *gpt_h, gpt_entry *gpt_e) 592 { 593 const int pte_blk_cnt = BLOCK_CNT((gpt_h->num_partition_entries 594 * sizeof(gpt_entry)), dev_desc); 595 u32 calc_crc32, sector; 596 597 sector = dev_desc->rawblksz / dev_desc->blksz; 598 599 debug("max lba: %x\n", (u32) dev_desc->rawlba); 600 /* Setup the Protective MBR */ 601 if (set_protective_mbr(dev_desc) < 0) 602 goto err; 603 604 /* Generate CRC for the Primary GPT Header */ 605 calc_crc32 = efi_crc32((const unsigned char *)gpt_e, 606 le32_to_cpu(gpt_h->num_partition_entries) * 607 le32_to_cpu(gpt_h->sizeof_partition_entry)); 608 gpt_h->partition_entry_array_crc32 = cpu_to_le32(calc_crc32); 609 610 calc_crc32 = efi_crc32((const unsigned char *)gpt_h, 611 le32_to_cpu(gpt_h->header_size)); 612 gpt_h->header_crc32 = cpu_to_le32(calc_crc32); 613 614 /* Write the First GPT to the block right after the Legacy MBR */ 615 if (blk_dwrite(dev_desc, 1 * sector, sector, gpt_h) != sector) 616 goto err; 617 618 if (blk_dwrite(dev_desc, le64_to_cpu(gpt_h->partition_entry_lba * sector), 619 pte_blk_cnt, gpt_e) != pte_blk_cnt) 620 goto err; 621 622 prepare_backup_gpt_header(gpt_h); 623 624 if (blk_dwrite(dev_desc, (lbaint_t)(le64_to_cpu(gpt_h->last_usable_lba) 625 + 1) * sector, pte_blk_cnt, gpt_e) != pte_blk_cnt) 626 goto err; 627 628 if (blk_dwrite(dev_desc, (lbaint_t)le64_to_cpu(gpt_h->my_lba) * sector, 1, 629 gpt_h) != 1) 630 goto err; 631 632 debug("GPT successfully written to block device!\n"); 633 return 0; 634 635 err: 636 printf("** Can't write to device %d **\n", dev_desc->devnum); 637 return -1; 638 } 639 640 int gpt_fill_pte(struct blk_desc *dev_desc, 641 gpt_header *gpt_h, gpt_entry *gpt_e, 642 disk_partition_t *partitions, int parts) 643 { 644 lbaint_t offset = (lbaint_t)le64_to_cpu(gpt_h->first_usable_lba); 645 lbaint_t last_usable_lba = (lbaint_t) 646 le64_to_cpu(gpt_h->last_usable_lba); 647 int i, k; 648 size_t efiname_len, dosname_len; 649 #if CONFIG_IS_ENABLED(PARTITION_UUIDS) 650 char *str_uuid; 651 unsigned char *bin_uuid; 652 #endif 653 #ifdef CONFIG_PARTITION_TYPE_GUID 654 char *str_type_guid; 655 unsigned char *bin_type_guid; 656 #endif 657 size_t hdr_start = gpt_h->my_lba; 658 size_t hdr_end = hdr_start + 1; 659 660 size_t pte_start = gpt_h->partition_entry_lba; 661 size_t pte_end = pte_start + 662 gpt_h->num_partition_entries * gpt_h->sizeof_partition_entry / 663 dev_desc->rawblksz; 664 665 for (i = 0; i < parts; i++) { 666 /* partition starting lba */ 667 lbaint_t start = partitions[i].start; 668 lbaint_t size = partitions[i].size; 669 670 if (start) { 671 offset = start + size; 672 } else { 673 start = offset; 674 offset += size; 675 } 676 677 /* 678 * If our partition overlaps with either the GPT 679 * header, or the partition entry, reject it. 680 */ 681 if (((start < hdr_end && hdr_start < (start + size)) || 682 (start < pte_end && pte_start < (start + size)))) { 683 printf("Partition overlap\n"); 684 return -1; 685 } 686 687 gpt_e[i].starting_lba = cpu_to_le64(start); 688 689 if (offset > (last_usable_lba + 1)) { 690 printf("Partitions layout exceds disk size\n"); 691 return -1; 692 } 693 /* partition ending lba */ 694 if ((i == parts - 1) && (size == 0)) 695 /* extend the last partition to maximuim */ 696 gpt_e[i].ending_lba = gpt_h->last_usable_lba; 697 else 698 gpt_e[i].ending_lba = cpu_to_le64(offset - 1); 699 700 #ifdef CONFIG_PARTITION_TYPE_GUID 701 str_type_guid = partitions[i].type_guid; 702 bin_type_guid = gpt_e[i].partition_type_guid.b; 703 if (strlen(str_type_guid)) { 704 if (uuid_str_to_bin(str_type_guid, bin_type_guid, 705 UUID_STR_FORMAT_GUID)) { 706 printf("Partition no. %d: invalid type guid: %s\n", 707 i, str_type_guid); 708 return -1; 709 } 710 } else { 711 /* default partition type GUID */ 712 memcpy(bin_type_guid, 713 &PARTITION_BASIC_DATA_GUID, 16); 714 } 715 #else 716 /* partition type GUID */ 717 memcpy(gpt_e[i].partition_type_guid.b, 718 &PARTITION_BASIC_DATA_GUID, 16); 719 #endif 720 721 #if CONFIG_IS_ENABLED(PARTITION_UUIDS) 722 str_uuid = partitions[i].uuid; 723 bin_uuid = gpt_e[i].unique_partition_guid.b; 724 725 if (uuid_str_to_bin(str_uuid, bin_uuid, UUID_STR_FORMAT_GUID)) { 726 printf("Partition no. %d: invalid guid: %s\n", 727 i, str_uuid); 728 return -1; 729 } 730 #endif 731 732 /* partition attributes */ 733 memset(&gpt_e[i].attributes, 0, 734 sizeof(gpt_entry_attributes)); 735 736 if (partitions[i].bootable) 737 gpt_e[i].attributes.fields.legacy_bios_bootable = 1; 738 739 /* partition name */ 740 efiname_len = sizeof(gpt_e[i].partition_name) 741 / sizeof(efi_char16_t); 742 dosname_len = sizeof(partitions[i].name); 743 744 memset(gpt_e[i].partition_name, 0, 745 sizeof(gpt_e[i].partition_name)); 746 747 for (k = 0; k < min(dosname_len, efiname_len); k++) 748 gpt_e[i].partition_name[k] = 749 (efi_char16_t)(partitions[i].name[k]); 750 751 debug("%s: name: %s offset[%d]: 0x" LBAF 752 " size[%d]: 0x" LBAF "\n", 753 __func__, partitions[i].name, i, 754 offset, i, size); 755 } 756 757 return 0; 758 } 759 760 static uint32_t partition_entries_offset(struct blk_desc *dev_desc) 761 { 762 uint32_t offset_blks = 2; 763 uint32_t __maybe_unused offset_bytes; 764 int __maybe_unused config_offset; 765 766 #if defined(CONFIG_EFI_PARTITION_ENTRIES_OFF) 767 /* 768 * Some architectures require their SPL loader at a fixed 769 * address within the first 16KB of the disk. To avoid an 770 * overlap with the partition entries of the EFI partition 771 * table, the first safe offset (in bytes, from the start of 772 * the disk) for the entries can be set in 773 * CONFIG_EFI_PARTITION_ENTRIES_OFF. 774 */ 775 offset_bytes = PAD_SIZE(CONFIG_EFI_PARTITION_ENTRIES_OFF, dev_desc->rawblksz); 776 offset_blks = offset_bytes / dev_desc->rawblksz; 777 #endif 778 779 #if defined(CONFIG_OF_CONTROL) 780 /* 781 * Allow the offset of the first partition entires (in bytes 782 * from the start of the device) to be specified as a property 783 * of the device tree '/config' node. 784 */ 785 config_offset = fdtdec_get_config_int(gd->fdt_blob, 786 "u-boot,efi-partition-entries-offset", 787 -EINVAL); 788 if (config_offset != -EINVAL) { 789 offset_bytes = PAD_SIZE(config_offset, dev_desc->rawblksz); 790 offset_blks = offset_bytes / dev_desc->rawblksz; 791 } 792 #endif 793 794 debug("efi: partition entries offset (in blocks): %d\n", offset_blks); 795 796 /* 797 * The earliest LBA this can be at is LBA#2 (i.e. right behind 798 * the (protective) MBR and the GPT header. 799 */ 800 if (offset_blks < 2) 801 offset_blks = 2; 802 803 return offset_blks; 804 } 805 806 int gpt_fill_header(struct blk_desc *dev_desc, gpt_header *gpt_h, 807 char *str_guid, int parts_count) 808 { 809 gpt_h->signature = cpu_to_le64(GPT_HEADER_SIGNATURE); 810 gpt_h->revision = cpu_to_le32(GPT_HEADER_REVISION_V1); 811 gpt_h->header_size = cpu_to_le32(sizeof(gpt_header)); 812 gpt_h->my_lba = cpu_to_le64(1); 813 gpt_h->alternate_lba = cpu_to_le64(dev_desc->rawlba - 1); 814 gpt_h->partition_entry_lba = 815 cpu_to_le64(partition_entries_offset(dev_desc)); 816 if (dev_desc->rawblksz == 4096) { 817 gpt_h->last_usable_lba = cpu_to_le64(dev_desc->rawlba - 6); 818 gpt_h->first_usable_lba = 819 cpu_to_le64(le64_to_cpu(gpt_h->partition_entry_lba) + 4); 820 } else { 821 gpt_h->last_usable_lba = cpu_to_le64(dev_desc->rawlba - 34); 822 gpt_h->first_usable_lba = 823 cpu_to_le64(le64_to_cpu(gpt_h->partition_entry_lba) + 32); 824 } 825 gpt_h->num_partition_entries = cpu_to_le32(GPT_ENTRY_NUMBERS); 826 gpt_h->sizeof_partition_entry = cpu_to_le32(sizeof(gpt_entry)); 827 gpt_h->header_crc32 = 0; 828 gpt_h->partition_entry_array_crc32 = 0; 829 830 if (uuid_str_to_bin(str_guid, gpt_h->disk_guid.b, UUID_STR_FORMAT_GUID)) 831 return -1; 832 833 return 0; 834 } 835 836 int gpt_restore(struct blk_desc *dev_desc, char *str_disk_guid, 837 disk_partition_t *partitions, int parts_count) 838 { 839 gpt_header *gpt_h; 840 gpt_entry *gpt_e; 841 int ret, size; 842 843 size = PAD_SIZE(sizeof(gpt_header), dev_desc->rawblksz); 844 gpt_h = malloc_cache_aligned(size); 845 if (gpt_h == NULL) { 846 printf("%s: calloc failed!\n", __func__); 847 return -1; 848 } 849 memset(gpt_h, 0, size); 850 851 size = PAD_SIZE(GPT_ENTRY_NUMBERS * sizeof(gpt_entry), dev_desc->rawblksz); 852 gpt_e = malloc_cache_aligned(size); 853 if (gpt_e == NULL) { 854 printf("%s: calloc failed!\n", __func__); 855 free(gpt_h); 856 return -1; 857 } 858 memset(gpt_e, 0, size); 859 860 /* Generate Primary GPT header (LBA1) */ 861 ret = gpt_fill_header(dev_desc, gpt_h, str_disk_guid, parts_count); 862 if (ret) 863 goto err; 864 865 /* Generate partition entries */ 866 ret = gpt_fill_pte(dev_desc, gpt_h, gpt_e, partitions, parts_count); 867 if (ret) 868 goto err; 869 870 /* Write GPT partition table */ 871 ret = write_gpt_table(dev_desc, gpt_h, gpt_e); 872 873 err: 874 free(gpt_e); 875 free(gpt_h); 876 return ret; 877 } 878 879 /** 880 * gpt_convert_efi_name_to_char() - convert u16 string to char string 881 * 882 * TODO: this conversion only supports ANSI characters 883 * 884 * @s: target buffer 885 * @es: u16 string to be converted 886 * @n: size of target buffer 887 */ 888 static void gpt_convert_efi_name_to_char(char *s, void *es, int n) 889 { 890 char *ess = es; 891 int i, j; 892 893 memset(s, '\0', n); 894 895 for (i = 0, j = 0; j < n; i += 2, j++) { 896 s[j] = ess[i]; 897 if (!ess[i]) 898 return; 899 } 900 } 901 902 int gpt_verify_headers(struct blk_desc *dev_desc, gpt_header *gpt_head, 903 gpt_entry **gpt_pte) 904 { 905 /* 906 * This function validates AND 907 * fills in the GPT header and PTE 908 */ 909 if (is_gpt_valid(dev_desc, 910 GPT_PRIMARY_PARTITION_TABLE_LBA, 911 gpt_head, gpt_pte) != 1) { 912 printf("%s: *** ERROR: Invalid GPT ***\n", 913 __func__); 914 return -1; 915 } 916 if (is_gpt_valid(dev_desc, (dev_desc->rawlba - 1), 917 gpt_head, gpt_pte) != 1) { 918 printf("%s: *** ERROR: Invalid Backup GPT ***\n", 919 __func__); 920 return -1; 921 } 922 923 return 0; 924 } 925 926 int gpt_verify_partitions(struct blk_desc *dev_desc, 927 disk_partition_t *partitions, int parts, 928 gpt_header *gpt_head, gpt_entry **gpt_pte) 929 { 930 char efi_str[PARTNAME_SZ + 1]; 931 u64 gpt_part_size; 932 gpt_entry *gpt_e; 933 int ret, i; 934 935 ret = gpt_verify_headers(dev_desc, gpt_head, gpt_pte); 936 if (ret) 937 return ret; 938 939 gpt_e = *gpt_pte; 940 941 for (i = 0; i < parts; i++) { 942 if (i == gpt_head->num_partition_entries) { 943 pr_err("More partitions than allowed!\n"); 944 return -1; 945 } 946 947 /* Check if GPT and ENV partition names match */ 948 gpt_convert_efi_name_to_char(efi_str, gpt_e[i].partition_name, 949 PARTNAME_SZ + 1); 950 951 debug("%s: part: %2d name - GPT: %16s, ENV: %16s ", 952 __func__, i, efi_str, partitions[i].name); 953 954 if (strncmp(efi_str, (char *)partitions[i].name, 955 sizeof(partitions->name))) { 956 pr_err("Partition name: %s does not match %s!\n", 957 efi_str, (char *)partitions[i].name); 958 return -1; 959 } 960 961 /* Check if GPT and ENV sizes match */ 962 gpt_part_size = le64_to_cpu(gpt_e[i].ending_lba) - 963 le64_to_cpu(gpt_e[i].starting_lba) + 1; 964 debug("size(LBA) - GPT: %8llu, ENV: %8llu ", 965 (unsigned long long)gpt_part_size, 966 (unsigned long long)partitions[i].size); 967 968 if (le64_to_cpu(gpt_part_size) != partitions[i].size) { 969 /* We do not check the extend partition size */ 970 if ((i == parts - 1) && (partitions[i].size == 0)) 971 continue; 972 973 pr_err("Partition %s size: %llu does not match %llu!\n", 974 efi_str, (unsigned long long)gpt_part_size, 975 (unsigned long long)partitions[i].size); 976 return -1; 977 } 978 979 /* 980 * Start address is optional - check only if provided 981 * in '$partition' variable 982 */ 983 if (!partitions[i].start) { 984 debug("\n"); 985 continue; 986 } 987 988 /* Check if GPT and ENV start LBAs match */ 989 debug("start LBA - GPT: %8llu, ENV: %8llu\n", 990 le64_to_cpu(gpt_e[i].starting_lba), 991 (unsigned long long)partitions[i].start); 992 993 if (le64_to_cpu(gpt_e[i].starting_lba) != partitions[i].start) { 994 pr_err("Partition %s start: %llu does not match %llu!\n", 995 efi_str, le64_to_cpu(gpt_e[i].starting_lba), 996 (unsigned long long)partitions[i].start); 997 return -1; 998 } 999 } 1000 1001 return 0; 1002 } 1003 1004 int is_valid_gpt_buf(struct blk_desc *dev_desc, void *buf) 1005 { 1006 gpt_header *gpt_h; 1007 gpt_entry *gpt_e; 1008 1009 /* determine start of GPT Header in the buffer */ 1010 gpt_h = buf + (GPT_PRIMARY_PARTITION_TABLE_LBA * 1011 dev_desc->rawblksz); 1012 1013 if ((le64_to_cpu(gpt_h->alternate_lba) + 1) 1014 != cpu_to_le64(dev_desc->rawlba) && 1015 le64_to_cpu(gpt_h->last_usable_lba) != FACTORY_UNKNOWN_LBA) { 1016 printf("%s: failed checking '%s'\n", __func__, 1017 "invalid GPT Disk Size"); 1018 return -1; 1019 } 1020 1021 if (validate_gpt_header(gpt_h, GPT_PRIMARY_PARTITION_TABLE_LBA, 1022 dev_desc->rawlba)) 1023 return -1; 1024 1025 /* determine start of GPT Entries in the buffer */ 1026 gpt_e = buf + (le64_to_cpu(gpt_h->partition_entry_lba) * 1027 dev_desc->rawblksz); 1028 if (validate_gpt_entries(gpt_h, gpt_e)) 1029 return -1; 1030 1031 return 0; 1032 } 1033 1034 int write_mbr_and_gpt_partitions(struct blk_desc *dev_desc, void *buf) 1035 { 1036 gpt_header *gpt_h; 1037 gpt_entry *gpt_e; 1038 int gpt_e_blk_cnt; 1039 lbaint_t lba; 1040 int cnt; 1041 1042 if (!dev_desc->rawblksz || !dev_desc->rawlba) { 1043 dev_desc->rawblksz = dev_desc->blksz; 1044 dev_desc->rawlba = dev_desc->lba; 1045 } 1046 1047 if (is_valid_gpt_buf(dev_desc, buf)) 1048 return -1; 1049 1050 /* determine start of GPT Header in the buffer */ 1051 gpt_h = buf + (GPT_PRIMARY_PARTITION_TABLE_LBA * 1052 dev_desc->rawblksz); 1053 1054 /* determine start of GPT Entries in the buffer */ 1055 gpt_e = buf + (le64_to_cpu(gpt_h->partition_entry_lba) * 1056 dev_desc->rawblksz); 1057 gpt_e_blk_cnt = BLOCK_CNT((le32_to_cpu(gpt_h->num_partition_entries) * 1058 le32_to_cpu(gpt_h->sizeof_partition_entry)), 1059 dev_desc); 1060 1061 /* write MBR */ 1062 lba = 0; /* MBR is always at 0 */ 1063 cnt = 1; /* MBR (1 block) */ 1064 if (blk_dwrite(dev_desc, lba, cnt, buf) != cnt) { 1065 printf("%s: failed writing '%s' (%d blks at 0x" LBAF ")\n", 1066 __func__, "MBR", cnt, lba); 1067 return 1; 1068 } 1069 1070 /* write Primary GPT */ 1071 lba = GPT_PRIMARY_PARTITION_TABLE_LBA; 1072 cnt = 1; /* GPT Header (1 block) */ 1073 if (blk_dwrite(dev_desc, lba, cnt, gpt_h) != cnt) { 1074 printf("%s: failed writing '%s' (%d blks at 0x" LBAF ")\n", 1075 __func__, "Primary GPT Header", cnt, lba); 1076 return 1; 1077 } 1078 1079 lba = le64_to_cpu(gpt_h->partition_entry_lba); 1080 cnt = gpt_e_blk_cnt; 1081 if (blk_dwrite(dev_desc, lba, cnt, gpt_e) != cnt) { 1082 printf("%s: failed writing '%s' (%d blks at 0x" LBAF ")\n", 1083 __func__, "Primary GPT Entries", cnt, lba); 1084 return 1; 1085 } 1086 1087 prepare_backup_gpt_header(gpt_h); 1088 1089 /* write Backup GPT */ 1090 lba = le64_to_cpu(gpt_h->partition_entry_lba); 1091 cnt = gpt_e_blk_cnt; 1092 if (blk_dwrite(dev_desc, lba, cnt, gpt_e) != cnt) { 1093 printf("%s: failed writing '%s' (%d blks at 0x" LBAF ")\n", 1094 __func__, "Backup GPT Entries", cnt, lba); 1095 return 1; 1096 } 1097 1098 lba = le64_to_cpu(gpt_h->my_lba); 1099 cnt = 1; /* GPT Header (1 block) */ 1100 if (blk_dwrite(dev_desc, lba, cnt, gpt_h) != cnt) { 1101 printf("%s: failed writing '%s' (%d blks at 0x" LBAF ")\n", 1102 __func__, "Backup GPT Header", cnt, lba); 1103 return 1; 1104 } 1105 1106 return 0; 1107 } 1108 #endif 1109 1110 /* 1111 * Private functions 1112 */ 1113 /* 1114 * pmbr_part_valid(): Check for EFI partition signature 1115 * 1116 * Returns: 1 if EFI GPT partition type is found. 1117 */ 1118 static int pmbr_part_valid(struct partition *part) 1119 { 1120 if (part->sys_ind == EFI_PMBR_OSTYPE_EFI_GPT && 1121 get_unaligned_le32(&part->start_sect) == 1UL) { 1122 return 1; 1123 } 1124 1125 return 0; 1126 } 1127 1128 /* 1129 * is_pmbr_valid(): test Protective MBR for validity 1130 * 1131 * Returns: 1 if PMBR is valid, 0 otherwise. 1132 * Validity depends on two things: 1133 * 1) MSDOS signature is in the last two bytes of the MBR 1134 * 2) One partition of type 0xEE is found, checked by pmbr_part_valid() 1135 */ 1136 static int is_pmbr_valid(legacy_mbr * mbr) 1137 { 1138 int i = 0; 1139 1140 #ifdef CONFIG_ARCH_ROCKCHIP 1141 /* 1142 * In sd-update card, we use RKPARM partition in bootloader to load 1143 * firmware, and use MS-DOS partition in recovery to update system. 1144 * Now, we want to use gpt in bootloader and abandon the RKPARM 1145 * partition. So in new sd-update card, we write the MS-DOS partition 1146 * table and gpt to sd card. Then we must return 1 directly when test 1147 * the mbr sector otherwise the gpt is unavailable. 1148 */ 1149 return 1; 1150 #endif 1151 1152 if (!mbr || le16_to_cpu(mbr->signature) != MSDOS_MBR_SIGNATURE) 1153 return 0; 1154 1155 for (i = 0; i < 4; i++) { 1156 if (pmbr_part_valid(&mbr->partition_record[i])) { 1157 return 1; 1158 } 1159 } 1160 return 0; 1161 } 1162 1163 /** 1164 * is_gpt_valid() - tests one GPT header and PTEs for validity 1165 * 1166 * lba is the logical block address of the GPT header to test 1167 * gpt is a GPT header ptr, filled on return. 1168 * ptes is a PTEs ptr, filled on return. 1169 * 1170 * Description: returns 1 if valid, 0 on error. 1171 * If valid, returns pointers to PTEs. 1172 */ 1173 static int is_gpt_valid(struct blk_desc *dev_desc, u64 lba, 1174 gpt_header *pgpt_head, gpt_entry **pgpt_pte) 1175 { 1176 int sector; 1177 /* Confirm valid arguments prior to allocation. */ 1178 if (!dev_desc || !pgpt_head) { 1179 printf("%s: Invalid Argument(s)\n", __func__); 1180 return 0; 1181 } 1182 1183 /* Re-use pte if it's not NULL */ 1184 if (*pgpt_pte) 1185 return 1; 1186 1187 ALLOC_CACHE_ALIGN_BUFFER_PAD(legacy_mbr, mbr, 1, dev_desc->rawblksz); 1188 1189 sector = dev_desc->rawblksz / dev_desc->blksz; 1190 /* Read MBR Header from device */ 1191 if (blk_dread(dev_desc, 0, sector, (ulong *)mbr) != sector) { 1192 printf("*** ERROR: Can't read MBR header ***\n"); 1193 return 0; 1194 } 1195 1196 /* Read GPT Header from device */ 1197 if (blk_dread(dev_desc, (lbaint_t)lba * sector, sector, pgpt_head) != sector) { 1198 printf("*** ERROR: Can't read GPT header ***\n"); 1199 return 0; 1200 } 1201 1202 if (validate_gpt_header(pgpt_head, (lbaint_t)lba, dev_desc->rawlba)) 1203 return 0; 1204 1205 if (dev_desc->sig_type == SIG_TYPE_NONE) { 1206 efi_guid_t empty = {}; 1207 if (memcmp(&pgpt_head->disk_guid, &empty, sizeof(empty))) { 1208 dev_desc->sig_type = SIG_TYPE_GUID; 1209 memcpy(&dev_desc->guid_sig, &pgpt_head->disk_guid, 1210 sizeof(empty)); 1211 } else if (mbr->unique_mbr_signature != 0) { 1212 dev_desc->sig_type = SIG_TYPE_MBR; 1213 dev_desc->mbr_sig = mbr->unique_mbr_signature; 1214 } 1215 } 1216 1217 /* Read and allocate Partition Table Entries */ 1218 *pgpt_pte = alloc_read_gpt_entries(dev_desc, pgpt_head); 1219 if (*pgpt_pte == NULL) { 1220 printf("GPT: Failed to allocate memory for PTE\n"); 1221 return 0; 1222 } 1223 1224 if (validate_gpt_entries(pgpt_head, *pgpt_pte)) { 1225 free(*pgpt_pte); 1226 *pgpt_pte = NULL; 1227 return 0; 1228 } 1229 1230 /* We're done, all's well */ 1231 return 1; 1232 } 1233 1234 /** 1235 * alloc_read_gpt_entries(): reads partition entries from disk 1236 * @dev_desc 1237 * @gpt - GPT header 1238 * 1239 * Description: Returns ptes on success, NULL on error. 1240 * Allocates space for PTEs based on information found in @gpt. 1241 * Notes: remember to free pte when you're done! 1242 */ 1243 static gpt_entry *alloc_read_gpt_entries(struct blk_desc *dev_desc, 1244 gpt_header *pgpt_head) 1245 { 1246 size_t count = 0, blk_cnt; 1247 lbaint_t blk; 1248 gpt_entry *pte = NULL; 1249 1250 if (!dev_desc || !pgpt_head) { 1251 printf("%s: Invalid Argument(s)\n", __func__); 1252 return NULL; 1253 } 1254 1255 count = le32_to_cpu(pgpt_head->num_partition_entries) * 1256 le32_to_cpu(pgpt_head->sizeof_partition_entry); 1257 1258 debug("%s: count = %u * %u = %lu\n", __func__, 1259 (u32) le32_to_cpu(pgpt_head->num_partition_entries), 1260 (u32) le32_to_cpu(pgpt_head->sizeof_partition_entry), 1261 (ulong)count); 1262 1263 /* Allocate memory for PTE, remember to FREE */ 1264 if (count != 0) { 1265 pte = memalign(ARCH_DMA_MINALIGN, 1266 PAD_SIZE(count, dev_desc->rawblksz)); 1267 } 1268 1269 if (count == 0 || pte == NULL) { 1270 printf("%s: ERROR: Can't allocate %#lX bytes for GPT Entries\n", 1271 __func__, (ulong)count); 1272 return NULL; 1273 } 1274 1275 /* Read GPT Entries from device */ 1276 blk = le64_to_cpu(pgpt_head->partition_entry_lba); 1277 blk_cnt = BLOCK_CNT(count, dev_desc); 1278 if (blk_dread(dev_desc, blk * dev_desc->rawblksz / dev_desc->blksz, (lbaint_t)blk_cnt, pte) != blk_cnt) { 1279 printf("*** ERROR: Can't read GPT Entries ***\n"); 1280 free(pte); 1281 return NULL; 1282 } 1283 return pte; 1284 } 1285 1286 /** 1287 * is_pte_valid(): validates a single Partition Table Entry 1288 * @gpt_entry - Pointer to a single Partition Table Entry 1289 * 1290 * Description: returns 1 if valid, 0 on error. 1291 */ 1292 static int is_pte_valid(gpt_entry * pte) 1293 { 1294 efi_guid_t unused_guid; 1295 1296 if (!pte) { 1297 printf("%s: Invalid Argument(s)\n", __func__); 1298 return 0; 1299 } 1300 1301 /* Only one validation for now: 1302 * The GUID Partition Type != Unused Entry (ALL-ZERO) 1303 */ 1304 memset(unused_guid.b, 0, sizeof(unused_guid.b)); 1305 1306 if (memcmp(pte->partition_type_guid.b, unused_guid.b, 1307 sizeof(unused_guid.b)) == 0) { 1308 1309 debug("%s: Found an unused PTE GUID at 0x%08X\n", __func__, 1310 (unsigned int)(uintptr_t)pte); 1311 1312 return 0; 1313 } else { 1314 return 1; 1315 } 1316 } 1317 1318 /* 1319 * Add an 'a_' prefix so it comes before 'dos' in the linker list. We need to 1320 * check EFI first, since a DOS partition is often used as a 'protective MBR' 1321 * with EFI. 1322 */ 1323 U_BOOT_PART_TYPE(a_efi) = { 1324 .name = "EFI", 1325 .part_type = PART_TYPE_EFI, 1326 .max_entries = GPT_ENTRY_NUMBERS, 1327 .get_info = part_get_info_ptr(part_get_info_efi), 1328 .print = part_print_ptr(part_print_efi), 1329 .test = part_test_efi, 1330 }; 1331 #endif 1332