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