1 // SPDX-License-Identifier: GPL-2.0+
3 * Copyright (C) 2008 RuggedCom, Inc.
4 * Richard Retanubun <RichardRetanubun@RuggedCom.com>
9 * when CONFIG_SYS_64BIT_LBA is not defined, lbaint_t is 32 bits; this
10 * limits the maximum size of addressable storage to < 2 Terra Bytes
13 #include <asm/cache.h>
14 #include <asm/unaligned.h>
22 #include <linux/compiler.h>
23 #include <linux/ctype.h>
24 #include <u-boot/crc.h>
26 DECLARE_GLOBAL_DATA_PTR;
29 * GUID for basic data partions.
31 static const efi_guid_t partition_basic_data_guid = PARTITION_BASIC_DATA_GUID;
33 #ifdef CONFIG_HAVE_BLOCK_DEVICE
35 * efi_crc32() - EFI version of crc32 function
36 * @buf: buffer to calculate crc32 of
37 * @len - length of buf
39 * Description: Returns EFI-style CRC32 value for @buf
41 static inline u32 efi_crc32(const void *buf, u32 len)
43 return crc32(0, buf, len);
47 * Private function prototypes
50 static int pmbr_part_valid(struct partition *part);
51 static int is_pmbr_valid(legacy_mbr * mbr);
52 static int is_gpt_valid(struct blk_desc *dev_desc, u64 lba,
53 gpt_header *pgpt_head, gpt_entry **pgpt_pte);
54 static gpt_entry *alloc_read_gpt_entries(struct blk_desc *dev_desc,
55 gpt_header *pgpt_head);
56 static int is_pte_valid(gpt_entry * pte);
57 static int find_valid_gpt(struct blk_desc *dev_desc, gpt_header *gpt_head,
58 gpt_entry **pgpt_pte);
60 static char *print_efiname(gpt_entry *pte)
62 static char name[PARTNAME_SZ + 1];
64 for (i = 0; i < PARTNAME_SZ; i++) {
66 c = pte->partition_name[i] & 0xff;
67 c = (c && !isprint(c)) ? '.' : c;
70 name[PARTNAME_SZ] = 0;
74 static const efi_guid_t system_guid = PARTITION_SYSTEM_GUID;
76 static int get_bootable(gpt_entry *p)
80 if (!memcmp(&p->partition_type_guid, &system_guid, sizeof(efi_guid_t)))
81 ret |= PART_EFI_SYSTEM_PARTITION;
82 if (p->attributes.fields.legacy_bios_bootable)
87 static int validate_gpt_header(gpt_header *gpt_h, lbaint_t lba,
90 uint32_t crc32_backup = 0;
93 /* Check the GPT header signature */
94 if (le64_to_cpu(gpt_h->signature) != GPT_HEADER_SIGNATURE_UBOOT) {
95 printf("%s signature is wrong: 0x%llX != 0x%llX\n",
96 "GUID Partition Table Header",
97 le64_to_cpu(gpt_h->signature),
98 GPT_HEADER_SIGNATURE_UBOOT);
102 /* Check the GUID Partition Table CRC */
103 memcpy(&crc32_backup, &gpt_h->header_crc32, sizeof(crc32_backup));
104 memset(&gpt_h->header_crc32, 0, sizeof(gpt_h->header_crc32));
106 calc_crc32 = efi_crc32((const unsigned char *)gpt_h,
107 le32_to_cpu(gpt_h->header_size));
109 memcpy(&gpt_h->header_crc32, &crc32_backup, sizeof(crc32_backup));
111 if (calc_crc32 != le32_to_cpu(crc32_backup)) {
112 printf("%s CRC is wrong: 0x%x != 0x%x\n",
113 "GUID Partition Table Header",
114 le32_to_cpu(crc32_backup), calc_crc32);
119 * Check that the my_lba entry points to the LBA that contains the GPT
121 if (le64_to_cpu(gpt_h->my_lba) != lba) {
122 printf("GPT: my_lba incorrect: %llX != " LBAF "\n",
123 le64_to_cpu(gpt_h->my_lba),
129 * Check that the first_usable_lba and that the last_usable_lba are
132 if (le64_to_cpu(gpt_h->first_usable_lba) > lastlba) {
133 printf("GPT: first_usable_lba incorrect: %llX > " LBAF "\n",
134 le64_to_cpu(gpt_h->first_usable_lba), lastlba);
137 if (le64_to_cpu(gpt_h->last_usable_lba) > lastlba) {
138 printf("GPT: last_usable_lba incorrect: %llX > " LBAF "\n",
139 le64_to_cpu(gpt_h->last_usable_lba), lastlba);
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);
150 static int validate_gpt_entries(gpt_header *gpt_h, gpt_entry *gpt_e)
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));
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),
170 static void prepare_backup_gpt_header(gpt_header *gpt_h)
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;
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);
188 #if CONFIG_IS_ENABLED(EFI_PARTITION)
190 * Public Functions (include/part.h)
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
197 int get_disk_guid(struct blk_desc * dev_desc, char *guid)
199 ALLOC_CACHE_ALIGN_BUFFER_PAD(gpt_header, gpt_head, 1, dev_desc->blksz);
200 gpt_entry *gpt_pte = NULL;
201 unsigned char *guid_bin;
203 /* This function validates AND fills in the GPT header and PTE */
204 if (find_valid_gpt(dev_desc, gpt_head, &gpt_pte) != 1)
207 guid_bin = gpt_head->disk_guid.b;
208 uuid_bin_to_str(guid_bin, guid, UUID_STR_FORMAT_GUID);
210 /* Remember to free pte */
215 void part_print_efi(struct blk_desc *dev_desc)
217 ALLOC_CACHE_ALIGN_BUFFER_PAD(gpt_header, gpt_head, 1, dev_desc->blksz);
218 gpt_entry *gpt_pte = NULL;
220 char uuid[UUID_STR_LEN + 1];
221 unsigned char *uuid_bin;
223 /* This function validates AND fills in the GPT header and PTE */
224 if (find_valid_gpt(dev_desc, gpt_head, &gpt_pte) != 1)
227 debug("%s: gpt-entry at %p\n", __func__, gpt_pte);
229 printf("Part\tStart LBA\tEnd LBA\t\tName\n");
230 printf("\tAttributes\n");
231 printf("\tType GUID\n");
232 printf("\tPartition GUID\n");
234 for (i = 0; i < le32_to_cpu(gpt_head->num_partition_entries); i++) {
235 /* Stop at the first non valid PTE */
236 if (!is_pte_valid(&gpt_pte[i]))
239 printf("%3d\t0x%08llx\t0x%08llx\t\"%s\"\n", (i + 1),
240 le64_to_cpu(gpt_pte[i].starting_lba),
241 le64_to_cpu(gpt_pte[i].ending_lba),
242 print_efiname(&gpt_pte[i]));
243 printf("\tattrs:\t0x%016llx\n", gpt_pte[i].attributes.raw);
244 uuid_bin = (unsigned char *)gpt_pte[i].partition_type_guid.b;
245 uuid_bin_to_str(uuid_bin, uuid, UUID_STR_FORMAT_GUID);
246 printf("\ttype:\t%s\n", uuid);
247 #ifdef CONFIG_PARTITION_TYPE_GUID
248 if (!uuid_guid_get_str(uuid_bin, uuid))
249 printf("\ttype:\t%s\n", uuid);
251 uuid_bin = (unsigned char *)gpt_pte[i].unique_partition_guid.b;
252 uuid_bin_to_str(uuid_bin, uuid, UUID_STR_FORMAT_GUID);
253 printf("\tguid:\t%s\n", uuid);
256 /* Remember to free pte */
261 int part_get_info_efi(struct blk_desc *dev_desc, int part,
262 struct disk_partition *info)
264 ALLOC_CACHE_ALIGN_BUFFER_PAD(gpt_header, gpt_head, 1, dev_desc->blksz);
265 gpt_entry *gpt_pte = NULL;
267 /* "part" argument must be at least 1 */
269 printf("%s: Invalid Argument(s)\n", __func__);
273 /* This function validates AND fills in the GPT header and PTE */
274 if (find_valid_gpt(dev_desc, gpt_head, &gpt_pte) != 1)
277 if (part > le32_to_cpu(gpt_head->num_partition_entries) ||
278 !is_pte_valid(&gpt_pte[part - 1])) {
279 debug("%s: *** ERROR: Invalid partition number %d ***\n",
285 /* The 'lbaint_t' casting may limit the maximum disk size to 2 TB */
286 info->start = (lbaint_t)le64_to_cpu(gpt_pte[part - 1].starting_lba);
287 /* The ending LBA is inclusive, to calculate size, add 1 to it */
288 info->size = (lbaint_t)le64_to_cpu(gpt_pte[part - 1].ending_lba) + 1
290 info->blksz = dev_desc->blksz;
292 snprintf((char *)info->name, sizeof(info->name), "%s",
293 print_efiname(&gpt_pte[part - 1]));
294 strcpy((char *)info->type, "U-Boot");
295 info->bootable = get_bootable(&gpt_pte[part - 1]);
296 #if CONFIG_IS_ENABLED(PARTITION_UUIDS)
297 uuid_bin_to_str(gpt_pte[part - 1].unique_partition_guid.b, info->uuid,
298 UUID_STR_FORMAT_GUID);
300 #ifdef CONFIG_PARTITION_TYPE_GUID
301 uuid_bin_to_str(gpt_pte[part - 1].partition_type_guid.b,
302 info->type_guid, UUID_STR_FORMAT_GUID);
305 debug("%s: start 0x" LBAF ", size 0x" LBAF ", name %s\n", __func__,
306 info->start, info->size, info->name);
308 /* Remember to free pte */
313 static int part_test_efi(struct blk_desc *dev_desc)
315 ALLOC_CACHE_ALIGN_BUFFER_PAD(legacy_mbr, legacymbr, 1, dev_desc->blksz);
317 /* Read legacy MBR from block 0 and validate it */
318 if ((blk_dread(dev_desc, 0, 1, (ulong *)legacymbr) != 1)
319 || (is_pmbr_valid(legacymbr) != 1)) {
326 * set_protective_mbr(): Set the EFI protective MBR
327 * @param dev_desc - block device descriptor
329 * @return - zero on success, otherwise error
331 static int set_protective_mbr(struct blk_desc *dev_desc)
333 /* Setup the Protective MBR */
334 ALLOC_CACHE_ALIGN_BUFFER_PAD(legacy_mbr, p_mbr, 1, dev_desc->blksz);
336 printf("%s: calloc failed!\n", __func__);
340 /* Read MBR to backup boot code if it exists */
341 if (blk_dread(dev_desc, 0, 1, p_mbr) != 1) {
342 pr_err("** Can't read from device %d **\n", dev_desc->devnum);
346 /* Clear all data in MBR except of backed up boot code */
347 memset((char *)p_mbr + MSDOS_MBR_BOOT_CODE_SIZE, 0, sizeof(*p_mbr) -
348 MSDOS_MBR_BOOT_CODE_SIZE);
350 /* Append signature */
351 p_mbr->signature = MSDOS_MBR_SIGNATURE;
352 p_mbr->partition_record[0].sys_ind = EFI_PMBR_OSTYPE_EFI_GPT;
353 p_mbr->partition_record[0].start_sect = 1;
354 p_mbr->partition_record[0].nr_sects = (u32) dev_desc->lba - 1;
356 /* Write MBR sector to the MMC device */
357 if (blk_dwrite(dev_desc, 0, 1, p_mbr) != 1) {
358 printf("** Can't write to device %d **\n",
366 int write_gpt_table(struct blk_desc *dev_desc,
367 gpt_header *gpt_h, gpt_entry *gpt_e)
369 const int pte_blk_cnt = BLOCK_CNT((gpt_h->num_partition_entries
370 * sizeof(gpt_entry)), dev_desc);
373 debug("max lba: %x\n", (u32) dev_desc->lba);
374 /* Setup the Protective MBR */
375 if (set_protective_mbr(dev_desc) < 0)
378 /* Generate CRC for the Primary GPT Header */
379 calc_crc32 = efi_crc32((const unsigned char *)gpt_e,
380 le32_to_cpu(gpt_h->num_partition_entries) *
381 le32_to_cpu(gpt_h->sizeof_partition_entry));
382 gpt_h->partition_entry_array_crc32 = cpu_to_le32(calc_crc32);
384 calc_crc32 = efi_crc32((const unsigned char *)gpt_h,
385 le32_to_cpu(gpt_h->header_size));
386 gpt_h->header_crc32 = cpu_to_le32(calc_crc32);
388 /* Write the First GPT to the block right after the Legacy MBR */
389 if (blk_dwrite(dev_desc, 1, 1, gpt_h) != 1)
392 if (blk_dwrite(dev_desc, le64_to_cpu(gpt_h->partition_entry_lba),
393 pte_blk_cnt, gpt_e) != pte_blk_cnt)
396 prepare_backup_gpt_header(gpt_h);
398 if (blk_dwrite(dev_desc, (lbaint_t)le64_to_cpu(gpt_h->last_usable_lba)
399 + 1, pte_blk_cnt, gpt_e) != pte_blk_cnt)
402 if (blk_dwrite(dev_desc, (lbaint_t)le64_to_cpu(gpt_h->my_lba), 1,
406 debug("GPT successfully written to block device!\n");
410 printf("** Can't write to device %d **\n", dev_desc->devnum);
414 int gpt_fill_pte(struct blk_desc *dev_desc,
415 gpt_header *gpt_h, gpt_entry *gpt_e,
416 struct disk_partition *partitions, int parts)
418 lbaint_t offset = (lbaint_t)le64_to_cpu(gpt_h->first_usable_lba);
419 lbaint_t last_usable_lba = (lbaint_t)
420 le64_to_cpu(gpt_h->last_usable_lba);
422 size_t efiname_len, dosname_len;
423 #if CONFIG_IS_ENABLED(PARTITION_UUIDS)
425 unsigned char *bin_uuid;
427 #ifdef CONFIG_PARTITION_TYPE_GUID
429 unsigned char *bin_type_guid;
431 size_t hdr_start = gpt_h->my_lba;
432 size_t hdr_end = hdr_start + 1;
434 size_t pte_start = gpt_h->partition_entry_lba;
435 size_t pte_end = pte_start +
436 gpt_h->num_partition_entries * gpt_h->sizeof_partition_entry /
439 for (i = 0; i < parts; i++) {
440 /* partition starting lba */
441 lbaint_t start = partitions[i].start;
442 lbaint_t size = partitions[i].size;
445 offset = start + size;
452 * If our partition overlaps with either the GPT
453 * header, or the partition entry, reject it.
455 if (((start < hdr_end && hdr_start < (start + size)) ||
456 (start < pte_end && pte_start < (start + size)))) {
457 printf("Partition overlap\n");
461 gpt_e[i].starting_lba = cpu_to_le64(start);
463 if (offset > (last_usable_lba + 1)) {
464 printf("Partitions layout exceds disk size\n");
467 /* partition ending lba */
468 if ((i == parts - 1) && (size == 0))
469 /* extend the last partition to maximuim */
470 gpt_e[i].ending_lba = gpt_h->last_usable_lba;
472 gpt_e[i].ending_lba = cpu_to_le64(offset - 1);
474 #ifdef CONFIG_PARTITION_TYPE_GUID
475 str_type_guid = partitions[i].type_guid;
476 bin_type_guid = gpt_e[i].partition_type_guid.b;
477 if (strlen(str_type_guid)) {
478 if (uuid_str_to_bin(str_type_guid, bin_type_guid,
479 UUID_STR_FORMAT_GUID)) {
480 printf("Partition no. %d: invalid type guid: %s\n",
485 /* default partition type GUID */
486 memcpy(bin_type_guid,
487 &partition_basic_data_guid, 16);
490 /* partition type GUID */
491 memcpy(gpt_e[i].partition_type_guid.b,
492 &partition_basic_data_guid, 16);
495 #if CONFIG_IS_ENABLED(PARTITION_UUIDS)
496 str_uuid = partitions[i].uuid;
497 bin_uuid = gpt_e[i].unique_partition_guid.b;
499 if (uuid_str_to_bin(str_uuid, bin_uuid, UUID_STR_FORMAT_GUID)) {
500 printf("Partition no. %d: invalid guid: %s\n",
506 /* partition attributes */
507 memset(&gpt_e[i].attributes, 0,
508 sizeof(gpt_entry_attributes));
510 if (partitions[i].bootable & PART_BOOTABLE)
511 gpt_e[i].attributes.fields.legacy_bios_bootable = 1;
514 efiname_len = sizeof(gpt_e[i].partition_name)
515 / sizeof(efi_char16_t);
516 dosname_len = sizeof(partitions[i].name);
518 memset(gpt_e[i].partition_name, 0,
519 sizeof(gpt_e[i].partition_name));
521 for (k = 0; k < min(dosname_len, efiname_len); k++)
522 gpt_e[i].partition_name[k] =
523 (efi_char16_t)(partitions[i].name[k]);
525 debug("%s: name: %s offset[%d]: 0x" LBAF
526 " size[%d]: 0x" LBAF "\n",
527 __func__, partitions[i].name, i,
534 static uint32_t partition_entries_offset(struct blk_desc *dev_desc)
536 uint32_t offset_blks = 2;
537 uint32_t __maybe_unused offset_bytes;
538 int __maybe_unused config_offset;
540 #if defined(CONFIG_EFI_PARTITION_ENTRIES_OFF)
542 * Some architectures require their SPL loader at a fixed
543 * address within the first 16KB of the disk. To avoid an
544 * overlap with the partition entries of the EFI partition
545 * table, the first safe offset (in bytes, from the start of
546 * the disk) for the entries can be set in
547 * CONFIG_EFI_PARTITION_ENTRIES_OFF.
550 PAD_TO_BLOCKSIZE(CONFIG_EFI_PARTITION_ENTRIES_OFF, dev_desc);
551 offset_blks = offset_bytes / dev_desc->blksz;
554 #if defined(CONFIG_OF_CONTROL)
556 * Allow the offset of the first partition entires (in bytes
557 * from the start of the device) to be specified as a property
558 * of the device tree '/config' node.
560 config_offset = fdtdec_get_config_int(gd->fdt_blob,
561 "u-boot,efi-partition-entries-offset",
563 if (config_offset != -EINVAL) {
564 offset_bytes = PAD_TO_BLOCKSIZE(config_offset, dev_desc);
565 offset_blks = offset_bytes / dev_desc->blksz;
569 debug("efi: partition entries offset (in blocks): %d\n", offset_blks);
572 * The earliest LBA this can be at is LBA#2 (i.e. right behind
573 * the (protective) MBR and the GPT header.
581 int gpt_fill_header(struct blk_desc *dev_desc, gpt_header *gpt_h,
582 char *str_guid, int parts_count)
584 gpt_h->signature = cpu_to_le64(GPT_HEADER_SIGNATURE_UBOOT);
585 gpt_h->revision = cpu_to_le32(GPT_HEADER_REVISION_V1);
586 gpt_h->header_size = cpu_to_le32(sizeof(gpt_header));
587 gpt_h->my_lba = cpu_to_le64(1);
588 gpt_h->alternate_lba = cpu_to_le64(dev_desc->lba - 1);
589 gpt_h->last_usable_lba = cpu_to_le64(dev_desc->lba - 34);
590 gpt_h->partition_entry_lba =
591 cpu_to_le64(partition_entries_offset(dev_desc));
592 gpt_h->first_usable_lba =
593 cpu_to_le64(le64_to_cpu(gpt_h->partition_entry_lba) + 32);
594 gpt_h->num_partition_entries = cpu_to_le32(GPT_ENTRY_NUMBERS);
595 gpt_h->sizeof_partition_entry = cpu_to_le32(sizeof(gpt_entry));
596 gpt_h->header_crc32 = 0;
597 gpt_h->partition_entry_array_crc32 = 0;
599 if (uuid_str_to_bin(str_guid, gpt_h->disk_guid.b, UUID_STR_FORMAT_GUID))
605 int gpt_restore(struct blk_desc *dev_desc, char *str_disk_guid,
606 struct disk_partition *partitions, int parts_count)
612 size = PAD_TO_BLOCKSIZE(sizeof(gpt_header), dev_desc);
613 gpt_h = malloc_cache_aligned(size);
615 printf("%s: calloc failed!\n", __func__);
618 memset(gpt_h, 0, size);
620 size = PAD_TO_BLOCKSIZE(GPT_ENTRY_NUMBERS * sizeof(gpt_entry),
622 gpt_e = malloc_cache_aligned(size);
624 printf("%s: calloc failed!\n", __func__);
628 memset(gpt_e, 0, size);
630 /* Generate Primary GPT header (LBA1) */
631 ret = gpt_fill_header(dev_desc, gpt_h, str_disk_guid, parts_count);
635 /* Generate partition entries */
636 ret = gpt_fill_pte(dev_desc, gpt_h, gpt_e, partitions, parts_count);
640 /* Write GPT partition table */
641 ret = write_gpt_table(dev_desc, gpt_h, gpt_e);
650 * gpt_convert_efi_name_to_char() - convert u16 string to char string
652 * TODO: this conversion only supports ANSI characters
655 * @es: u16 string to be converted
656 * @n: size of target buffer
658 static void gpt_convert_efi_name_to_char(char *s, void *es, int n)
665 for (i = 0, j = 0; j < n; i += 2, j++) {
672 int gpt_verify_headers(struct blk_desc *dev_desc, gpt_header *gpt_head,
676 * This function validates AND
677 * fills in the GPT header and PTE
679 if (is_gpt_valid(dev_desc,
680 GPT_PRIMARY_PARTITION_TABLE_LBA,
681 gpt_head, gpt_pte) != 1) {
682 printf("%s: *** ERROR: Invalid GPT ***\n",
687 /* Free pte before allocating again */
690 if (is_gpt_valid(dev_desc, (dev_desc->lba - 1),
691 gpt_head, gpt_pte) != 1) {
692 printf("%s: *** ERROR: Invalid Backup GPT ***\n",
700 int gpt_verify_partitions(struct blk_desc *dev_desc,
701 struct disk_partition *partitions, int parts,
702 gpt_header *gpt_head, gpt_entry **gpt_pte)
704 char efi_str[PARTNAME_SZ + 1];
709 ret = gpt_verify_headers(dev_desc, gpt_head, gpt_pte);
715 for (i = 0; i < parts; i++) {
716 if (i == gpt_head->num_partition_entries) {
717 pr_err("More partitions than allowed!\n");
721 /* Check if GPT and ENV partition names match */
722 gpt_convert_efi_name_to_char(efi_str, gpt_e[i].partition_name,
725 debug("%s: part: %2d name - GPT: %16s, ENV: %16s ",
726 __func__, i, efi_str, partitions[i].name);
728 if (strncmp(efi_str, (char *)partitions[i].name,
729 sizeof(partitions->name))) {
730 pr_err("Partition name: %s does not match %s!\n",
731 efi_str, (char *)partitions[i].name);
735 /* Check if GPT and ENV sizes match */
736 gpt_part_size = le64_to_cpu(gpt_e[i].ending_lba) -
737 le64_to_cpu(gpt_e[i].starting_lba) + 1;
738 debug("size(LBA) - GPT: %8llu, ENV: %8llu ",
739 (unsigned long long)gpt_part_size,
740 (unsigned long long)partitions[i].size);
742 if (le64_to_cpu(gpt_part_size) != partitions[i].size) {
743 /* We do not check the extend partition size */
744 if ((i == parts - 1) && (partitions[i].size == 0))
747 pr_err("Partition %s size: %llu does not match %llu!\n",
748 efi_str, (unsigned long long)gpt_part_size,
749 (unsigned long long)partitions[i].size);
754 * Start address is optional - check only if provided
755 * in '$partition' variable
757 if (!partitions[i].start) {
762 /* Check if GPT and ENV start LBAs match */
763 debug("start LBA - GPT: %8llu, ENV: %8llu\n",
764 le64_to_cpu(gpt_e[i].starting_lba),
765 (unsigned long long)partitions[i].start);
767 if (le64_to_cpu(gpt_e[i].starting_lba) != partitions[i].start) {
768 pr_err("Partition %s start: %llu does not match %llu!\n",
769 efi_str, le64_to_cpu(gpt_e[i].starting_lba),
770 (unsigned long long)partitions[i].start);
778 int is_valid_gpt_buf(struct blk_desc *dev_desc, void *buf)
783 /* determine start of GPT Header in the buffer */
784 gpt_h = buf + (GPT_PRIMARY_PARTITION_TABLE_LBA *
786 if (validate_gpt_header(gpt_h, GPT_PRIMARY_PARTITION_TABLE_LBA,
790 /* determine start of GPT Entries in the buffer */
791 gpt_e = buf + (le64_to_cpu(gpt_h->partition_entry_lba) *
793 if (validate_gpt_entries(gpt_h, gpt_e))
799 int write_mbr_and_gpt_partitions(struct blk_desc *dev_desc, void *buf)
807 if (is_valid_gpt_buf(dev_desc, buf))
810 /* determine start of GPT Header in the buffer */
811 gpt_h = buf + (GPT_PRIMARY_PARTITION_TABLE_LBA *
814 /* determine start of GPT Entries in the buffer */
815 gpt_e = buf + (le64_to_cpu(gpt_h->partition_entry_lba) *
817 gpt_e_blk_cnt = BLOCK_CNT((le32_to_cpu(gpt_h->num_partition_entries) *
818 le32_to_cpu(gpt_h->sizeof_partition_entry)),
822 lba = 0; /* MBR is always at 0 */
823 cnt = 1; /* MBR (1 block) */
824 if (blk_dwrite(dev_desc, lba, cnt, buf) != cnt) {
825 printf("%s: failed writing '%s' (%d blks at 0x" LBAF ")\n",
826 __func__, "MBR", cnt, lba);
830 /* write Primary GPT */
831 lba = GPT_PRIMARY_PARTITION_TABLE_LBA;
832 cnt = 1; /* GPT Header (1 block) */
833 if (blk_dwrite(dev_desc, lba, cnt, gpt_h) != cnt) {
834 printf("%s: failed writing '%s' (%d blks at 0x" LBAF ")\n",
835 __func__, "Primary GPT Header", cnt, lba);
839 lba = le64_to_cpu(gpt_h->partition_entry_lba);
841 if (blk_dwrite(dev_desc, lba, cnt, gpt_e) != cnt) {
842 printf("%s: failed writing '%s' (%d blks at 0x" LBAF ")\n",
843 __func__, "Primary GPT Entries", cnt, lba);
847 prepare_backup_gpt_header(gpt_h);
849 /* write Backup GPT */
850 lba = le64_to_cpu(gpt_h->partition_entry_lba);
852 if (blk_dwrite(dev_desc, lba, cnt, gpt_e) != cnt) {
853 printf("%s: failed writing '%s' (%d blks at 0x" LBAF ")\n",
854 __func__, "Backup GPT Entries", cnt, lba);
858 lba = le64_to_cpu(gpt_h->my_lba);
859 cnt = 1; /* GPT Header (1 block) */
860 if (blk_dwrite(dev_desc, lba, cnt, gpt_h) != cnt) {
861 printf("%s: failed writing '%s' (%d blks at 0x" LBAF ")\n",
862 __func__, "Backup GPT Header", cnt, lba);
874 * pmbr_part_valid(): Check for EFI partition signature
876 * Returns: 1 if EFI GPT partition type is found.
878 static int pmbr_part_valid(struct partition *part)
880 if (part->sys_ind == EFI_PMBR_OSTYPE_EFI_GPT &&
881 get_unaligned_le32(&part->start_sect) == 1UL) {
889 * is_pmbr_valid(): test Protective MBR for validity
891 * Returns: 1 if PMBR is valid, 0 otherwise.
892 * Validity depends on two things:
893 * 1) MSDOS signature is in the last two bytes of the MBR
894 * 2) One partition of type 0xEE is found, checked by pmbr_part_valid()
896 static int is_pmbr_valid(legacy_mbr * mbr)
900 if (!mbr || le16_to_cpu(mbr->signature) != MSDOS_MBR_SIGNATURE)
903 for (i = 0; i < 4; i++) {
904 if (pmbr_part_valid(&mbr->partition_record[i])) {
912 * is_gpt_valid() - tests one GPT header and PTEs for validity
914 * lba is the logical block address of the GPT header to test
915 * gpt is a GPT header ptr, filled on return.
916 * ptes is a PTEs ptr, filled on return.
918 * Description: returns 1 if valid, 0 on error, 2 if ignored header
919 * If valid, returns pointers to PTEs.
921 static int is_gpt_valid(struct blk_desc *dev_desc, u64 lba,
922 gpt_header *pgpt_head, gpt_entry **pgpt_pte)
924 /* Confirm valid arguments prior to allocation. */
925 if (!dev_desc || !pgpt_head) {
926 printf("%s: Invalid Argument(s)\n", __func__);
930 ALLOC_CACHE_ALIGN_BUFFER_PAD(legacy_mbr, mbr, 1, dev_desc->blksz);
932 /* Read MBR Header from device */
933 if (blk_dread(dev_desc, 0, 1, (ulong *)mbr) != 1) {
934 printf("*** ERROR: Can't read MBR header ***\n");
938 /* Read GPT Header from device */
939 if (blk_dread(dev_desc, (lbaint_t)lba, 1, pgpt_head) != 1) {
940 printf("*** ERROR: Can't read GPT header ***\n");
944 /* Invalid but nothing to yell about. */
945 if (le64_to_cpu(pgpt_head->signature) == GPT_HEADER_CHROMEOS_IGNORE) {
946 debug("ChromeOS 'IGNOREME' GPT header found and ignored\n");
950 if (validate_gpt_header(pgpt_head, (lbaint_t)lba, dev_desc->lba))
953 if (dev_desc->sig_type == SIG_TYPE_NONE) {
954 efi_guid_t empty = {};
955 if (memcmp(&pgpt_head->disk_guid, &empty, sizeof(empty))) {
956 dev_desc->sig_type = SIG_TYPE_GUID;
957 memcpy(&dev_desc->guid_sig, &pgpt_head->disk_guid,
959 } else if (mbr->unique_mbr_signature != 0) {
960 dev_desc->sig_type = SIG_TYPE_MBR;
961 dev_desc->mbr_sig = mbr->unique_mbr_signature;
965 /* Read and allocate Partition Table Entries */
966 *pgpt_pte = alloc_read_gpt_entries(dev_desc, pgpt_head);
967 if (*pgpt_pte == NULL) {
968 printf("GPT: Failed to allocate memory for PTE\n");
972 if (validate_gpt_entries(pgpt_head, *pgpt_pte)) {
977 /* We're done, all's well */
982 * find_valid_gpt() - finds a valid GPT header and PTEs
984 * gpt is a GPT header ptr, filled on return.
985 * ptes is a PTEs ptr, filled on return.
987 * Description: returns 1 if found a valid gpt, 0 on error.
988 * If valid, returns pointers to PTEs.
990 static int find_valid_gpt(struct blk_desc *dev_desc, gpt_header *gpt_head,
991 gpt_entry **pgpt_pte)
995 r = is_gpt_valid(dev_desc, GPT_PRIMARY_PARTITION_TABLE_LBA, gpt_head,
1000 printf("%s: *** ERROR: Invalid GPT ***\n", __func__);
1002 if (is_gpt_valid(dev_desc, (dev_desc->lba - 1), gpt_head,
1004 printf("%s: *** ERROR: Invalid Backup GPT ***\n",
1009 printf("%s: *** Using Backup GPT ***\n",
1016 * alloc_read_gpt_entries(): reads partition entries from disk
1020 * Description: Returns ptes on success, NULL on error.
1021 * Allocates space for PTEs based on information found in @gpt.
1022 * Notes: remember to free pte when you're done!
1024 static gpt_entry *alloc_read_gpt_entries(struct blk_desc *dev_desc,
1025 gpt_header *pgpt_head)
1027 size_t count = 0, blk_cnt;
1029 gpt_entry *pte = NULL;
1031 if (!dev_desc || !pgpt_head) {
1032 printf("%s: Invalid Argument(s)\n", __func__);
1036 count = le32_to_cpu(pgpt_head->num_partition_entries) *
1037 le32_to_cpu(pgpt_head->sizeof_partition_entry);
1039 debug("%s: count = %u * %u = %lu\n", __func__,
1040 (u32) le32_to_cpu(pgpt_head->num_partition_entries),
1041 (u32) le32_to_cpu(pgpt_head->sizeof_partition_entry),
1044 /* Allocate memory for PTE, remember to FREE */
1046 pte = memalign(ARCH_DMA_MINALIGN,
1047 PAD_TO_BLOCKSIZE(count, dev_desc));
1050 if (count == 0 || pte == NULL) {
1051 printf("%s: ERROR: Can't allocate %#lX bytes for GPT Entries\n",
1052 __func__, (ulong)count);
1056 /* Read GPT Entries from device */
1057 blk = le64_to_cpu(pgpt_head->partition_entry_lba);
1058 blk_cnt = BLOCK_CNT(count, dev_desc);
1059 if (blk_dread(dev_desc, blk, (lbaint_t)blk_cnt, pte) != blk_cnt) {
1060 printf("*** ERROR: Can't read GPT Entries ***\n");
1068 * is_pte_valid(): validates a single Partition Table Entry
1069 * @gpt_entry - Pointer to a single Partition Table Entry
1071 * Description: returns 1 if valid, 0 on error.
1073 static int is_pte_valid(gpt_entry * pte)
1075 efi_guid_t unused_guid;
1078 printf("%s: Invalid Argument(s)\n", __func__);
1082 /* Only one validation for now:
1083 * The GUID Partition Type != Unused Entry (ALL-ZERO)
1085 memset(unused_guid.b, 0, sizeof(unused_guid.b));
1087 if (memcmp(pte->partition_type_guid.b, unused_guid.b,
1088 sizeof(unused_guid.b)) == 0) {
1090 debug("%s: Found an unused PTE GUID at 0x%08X\n", __func__,
1091 (unsigned int)(uintptr_t)pte);
1100 * Add an 'a_' prefix so it comes before 'dos' in the linker list. We need to
1101 * check EFI first, since a DOS partition is often used as a 'protective MBR'
1104 U_BOOT_PART_TYPE(a_efi) = {
1106 .part_type = PART_TYPE_EFI,
1107 .max_entries = GPT_ENTRY_NUMBERS,
1108 .get_info = part_get_info_ptr(part_get_info_efi),
1109 .print = part_print_ptr(part_print_efi),
1110 .test = part_test_efi,