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
12 #include <asm/unaligned.h>
21 #include <linux/compiler.h>
22 #include <linux/ctype.h>
24 DECLARE_GLOBAL_DATA_PTR;
27 * GUID for basic data partions.
29 static const efi_guid_t partition_basic_data_guid = PARTITION_BASIC_DATA_GUID;
31 #ifdef CONFIG_HAVE_BLOCK_DEVICE
33 * efi_crc32() - EFI version of crc32 function
34 * @buf: buffer to calculate crc32 of
35 * @len - length of buf
37 * Description: Returns EFI-style CRC32 value for @buf
39 static inline u32 efi_crc32(const void *buf, u32 len)
41 return crc32(0, buf, len);
45 * Private function prototypes
48 static int pmbr_part_valid(struct partition *part);
49 static int is_pmbr_valid(legacy_mbr * mbr);
50 static int is_gpt_valid(struct blk_desc *dev_desc, u64 lba,
51 gpt_header *pgpt_head, gpt_entry **pgpt_pte);
52 static gpt_entry *alloc_read_gpt_entries(struct blk_desc *dev_desc,
53 gpt_header *pgpt_head);
54 static int is_pte_valid(gpt_entry * pte);
56 static char *print_efiname(gpt_entry *pte)
58 static char name[PARTNAME_SZ + 1];
60 for (i = 0; i < PARTNAME_SZ; i++) {
62 c = pte->partition_name[i] & 0xff;
63 c = (c && !isprint(c)) ? '.' : c;
66 name[PARTNAME_SZ] = 0;
70 static efi_guid_t system_guid = PARTITION_SYSTEM_GUID;
72 static inline int is_bootable(gpt_entry *p)
74 return p->attributes.fields.legacy_bios_bootable ||
75 !memcmp(&(p->partition_type_guid), &system_guid,
79 static int validate_gpt_header(gpt_header *gpt_h, lbaint_t lba,
82 uint32_t crc32_backup = 0;
85 /* Check the GPT header signature */
86 if (le64_to_cpu(gpt_h->signature) != GPT_HEADER_SIGNATURE) {
87 printf("%s signature is wrong: 0x%llX != 0x%llX\n",
88 "GUID Partition Table Header",
89 le64_to_cpu(gpt_h->signature),
90 GPT_HEADER_SIGNATURE);
94 /* Check the GUID Partition Table CRC */
95 memcpy(&crc32_backup, &gpt_h->header_crc32, sizeof(crc32_backup));
96 memset(&gpt_h->header_crc32, 0, sizeof(gpt_h->header_crc32));
98 calc_crc32 = efi_crc32((const unsigned char *)gpt_h,
99 le32_to_cpu(gpt_h->header_size));
101 memcpy(&gpt_h->header_crc32, &crc32_backup, sizeof(crc32_backup));
103 if (calc_crc32 != le32_to_cpu(crc32_backup)) {
104 printf("%s CRC is wrong: 0x%x != 0x%x\n",
105 "GUID Partition Table Header",
106 le32_to_cpu(crc32_backup), calc_crc32);
111 * Check that the my_lba entry points to the LBA that contains the GPT
113 if (le64_to_cpu(gpt_h->my_lba) != lba) {
114 printf("GPT: my_lba incorrect: %llX != " LBAF "\n",
115 le64_to_cpu(gpt_h->my_lba),
121 * Check that the first_usable_lba and that the last_usable_lba are
124 if (le64_to_cpu(gpt_h->first_usable_lba) > lastlba) {
125 printf("GPT: first_usable_lba incorrect: %llX > " LBAF "\n",
126 le64_to_cpu(gpt_h->first_usable_lba), lastlba);
129 if (le64_to_cpu(gpt_h->last_usable_lba) > lastlba) {
130 printf("GPT: last_usable_lba incorrect: %llX > " LBAF "\n",
131 le64_to_cpu(gpt_h->last_usable_lba), lastlba);
135 debug("GPT: first_usable_lba: %llX last_usable_lba: %llX last lba: "
136 LBAF "\n", le64_to_cpu(gpt_h->first_usable_lba),
137 le64_to_cpu(gpt_h->last_usable_lba), lastlba);
142 static int validate_gpt_entries(gpt_header *gpt_h, gpt_entry *gpt_e)
146 /* Check the GUID Partition Table Entry Array CRC */
147 calc_crc32 = efi_crc32((const unsigned char *)gpt_e,
148 le32_to_cpu(gpt_h->num_partition_entries) *
149 le32_to_cpu(gpt_h->sizeof_partition_entry));
151 if (calc_crc32 != le32_to_cpu(gpt_h->partition_entry_array_crc32)) {
152 printf("%s: 0x%x != 0x%x\n",
153 "GUID Partition Table Entry Array CRC is wrong",
154 le32_to_cpu(gpt_h->partition_entry_array_crc32),
162 static void prepare_backup_gpt_header(gpt_header *gpt_h)
167 /* recalculate the values for the Backup GPT Header */
168 val = le64_to_cpu(gpt_h->my_lba);
169 gpt_h->my_lba = gpt_h->alternate_lba;
170 gpt_h->alternate_lba = cpu_to_le64(val);
171 gpt_h->partition_entry_lba =
172 cpu_to_le64(le64_to_cpu(gpt_h->last_usable_lba) + 1);
173 gpt_h->header_crc32 = 0;
175 calc_crc32 = efi_crc32((const unsigned char *)gpt_h,
176 le32_to_cpu(gpt_h->header_size));
177 gpt_h->header_crc32 = cpu_to_le32(calc_crc32);
180 #if CONFIG_IS_ENABLED(EFI_PARTITION)
182 * Public Functions (include/part.h)
186 * UUID is displayed as 32 hexadecimal digits, in 5 groups,
187 * separated by hyphens, in the form 8-4-4-4-12 for a total of 36 characters
189 int get_disk_guid(struct blk_desc * dev_desc, char *guid)
191 ALLOC_CACHE_ALIGN_BUFFER_PAD(gpt_header, gpt_head, 1, dev_desc->blksz);
192 gpt_entry *gpt_pte = NULL;
193 unsigned char *guid_bin;
195 /* This function validates AND fills in the GPT header and PTE */
196 if (is_gpt_valid(dev_desc, GPT_PRIMARY_PARTITION_TABLE_LBA,
197 gpt_head, &gpt_pte) != 1) {
198 printf("%s: *** ERROR: Invalid GPT ***\n", __func__);
199 if (is_gpt_valid(dev_desc, dev_desc->lba - 1,
200 gpt_head, &gpt_pte) != 1) {
201 printf("%s: *** ERROR: Invalid Backup GPT ***\n",
205 printf("%s: *** Using Backup GPT ***\n",
210 guid_bin = gpt_head->disk_guid.b;
211 uuid_bin_to_str(guid_bin, guid, UUID_STR_FORMAT_GUID);
216 void part_print_efi(struct blk_desc *dev_desc)
218 ALLOC_CACHE_ALIGN_BUFFER_PAD(gpt_header, gpt_head, 1, dev_desc->blksz);
219 gpt_entry *gpt_pte = NULL;
221 char uuid[UUID_STR_LEN + 1];
222 unsigned char *uuid_bin;
224 /* This function validates AND fills in the GPT header and PTE */
225 if (is_gpt_valid(dev_desc, GPT_PRIMARY_PARTITION_TABLE_LBA,
226 gpt_head, &gpt_pte) != 1) {
227 printf("%s: *** ERROR: Invalid GPT ***\n", __func__);
228 if (is_gpt_valid(dev_desc, (dev_desc->lba - 1),
229 gpt_head, &gpt_pte) != 1) {
230 printf("%s: *** ERROR: Invalid Backup GPT ***\n",
234 printf("%s: *** Using Backup GPT ***\n",
239 debug("%s: gpt-entry at %p\n", __func__, gpt_pte);
241 printf("Part\tStart LBA\tEnd LBA\t\tName\n");
242 printf("\tAttributes\n");
243 printf("\tType GUID\n");
244 printf("\tPartition GUID\n");
246 for (i = 0; i < le32_to_cpu(gpt_head->num_partition_entries); i++) {
247 /* Stop at the first non valid PTE */
248 if (!is_pte_valid(&gpt_pte[i]))
251 printf("%3d\t0x%08llx\t0x%08llx\t\"%s\"\n", (i + 1),
252 le64_to_cpu(gpt_pte[i].starting_lba),
253 le64_to_cpu(gpt_pte[i].ending_lba),
254 print_efiname(&gpt_pte[i]));
255 printf("\tattrs:\t0x%016llx\n", gpt_pte[i].attributes.raw);
256 uuid_bin = (unsigned char *)gpt_pte[i].partition_type_guid.b;
257 uuid_bin_to_str(uuid_bin, uuid, UUID_STR_FORMAT_GUID);
258 printf("\ttype:\t%s\n", uuid);
259 #ifdef CONFIG_PARTITION_TYPE_GUID
260 if (!uuid_guid_get_str(uuid_bin, uuid))
261 printf("\ttype:\t%s\n", uuid);
263 uuid_bin = (unsigned char *)gpt_pte[i].unique_partition_guid.b;
264 uuid_bin_to_str(uuid_bin, uuid, UUID_STR_FORMAT_GUID);
265 printf("\tguid:\t%s\n", uuid);
268 /* Remember to free pte */
273 int part_get_info_efi(struct blk_desc *dev_desc, int part,
274 disk_partition_t *info)
276 ALLOC_CACHE_ALIGN_BUFFER_PAD(gpt_header, gpt_head, 1, dev_desc->blksz);
277 gpt_entry *gpt_pte = NULL;
279 /* "part" argument must be at least 1 */
281 printf("%s: Invalid Argument(s)\n", __func__);
285 /* This function validates AND fills in the GPT header and PTE */
286 if (is_gpt_valid(dev_desc, GPT_PRIMARY_PARTITION_TABLE_LBA,
287 gpt_head, &gpt_pte) != 1) {
288 printf("%s: *** ERROR: Invalid GPT ***\n", __func__);
289 if (is_gpt_valid(dev_desc, (dev_desc->lba - 1),
290 gpt_head, &gpt_pte) != 1) {
291 printf("%s: *** ERROR: Invalid Backup GPT ***\n",
295 printf("%s: *** Using Backup GPT ***\n",
300 if (part > le32_to_cpu(gpt_head->num_partition_entries) ||
301 !is_pte_valid(&gpt_pte[part - 1])) {
302 debug("%s: *** ERROR: Invalid partition number %d ***\n",
308 /* The 'lbaint_t' casting may limit the maximum disk size to 2 TB */
309 info->start = (lbaint_t)le64_to_cpu(gpt_pte[part - 1].starting_lba);
310 /* The ending LBA is inclusive, to calculate size, add 1 to it */
311 info->size = (lbaint_t)le64_to_cpu(gpt_pte[part - 1].ending_lba) + 1
313 info->blksz = dev_desc->blksz;
315 sprintf((char *)info->name, "%s",
316 print_efiname(&gpt_pte[part - 1]));
317 strcpy((char *)info->type, "U-Boot");
318 info->bootable = is_bootable(&gpt_pte[part - 1]);
319 #if CONFIG_IS_ENABLED(PARTITION_UUIDS)
320 uuid_bin_to_str(gpt_pte[part - 1].unique_partition_guid.b, info->uuid,
321 UUID_STR_FORMAT_GUID);
323 #ifdef CONFIG_PARTITION_TYPE_GUID
324 uuid_bin_to_str(gpt_pte[part - 1].partition_type_guid.b,
325 info->type_guid, UUID_STR_FORMAT_GUID);
328 debug("%s: start 0x" LBAF ", size 0x" LBAF ", name %s\n", __func__,
329 info->start, info->size, info->name);
331 /* Remember to free pte */
336 static int part_test_efi(struct blk_desc *dev_desc)
338 ALLOC_CACHE_ALIGN_BUFFER_PAD(legacy_mbr, legacymbr, 1, dev_desc->blksz);
340 /* Read legacy MBR from block 0 and validate it */
341 if ((blk_dread(dev_desc, 0, 1, (ulong *)legacymbr) != 1)
342 || (is_pmbr_valid(legacymbr) != 1)) {
349 * set_protective_mbr(): Set the EFI protective MBR
350 * @param dev_desc - block device descriptor
352 * @return - zero on success, otherwise error
354 static int set_protective_mbr(struct blk_desc *dev_desc)
356 /* Setup the Protective MBR */
357 ALLOC_CACHE_ALIGN_BUFFER_PAD(legacy_mbr, p_mbr, 1, dev_desc->blksz);
359 printf("%s: calloc failed!\n", __func__);
363 /* Read MBR to backup boot code if it exists */
364 if (blk_dread(dev_desc, 0, 1, p_mbr) != 1) {
365 pr_err("** Can't read from device %d **\n", dev_desc->devnum);
369 /* Clear all data in MBR except of backed up boot code */
370 memset((char *)p_mbr + MSDOS_MBR_BOOT_CODE_SIZE, 0, sizeof(*p_mbr) -
371 MSDOS_MBR_BOOT_CODE_SIZE);
373 /* Append signature */
374 p_mbr->signature = MSDOS_MBR_SIGNATURE;
375 p_mbr->partition_record[0].sys_ind = EFI_PMBR_OSTYPE_EFI_GPT;
376 p_mbr->partition_record[0].start_sect = 1;
377 p_mbr->partition_record[0].nr_sects = (u32) dev_desc->lba - 1;
379 /* Write MBR sector to the MMC device */
380 if (blk_dwrite(dev_desc, 0, 1, p_mbr) != 1) {
381 printf("** Can't write to device %d **\n",
389 int write_gpt_table(struct blk_desc *dev_desc,
390 gpt_header *gpt_h, gpt_entry *gpt_e)
392 const int pte_blk_cnt = BLOCK_CNT((gpt_h->num_partition_entries
393 * sizeof(gpt_entry)), dev_desc);
396 debug("max lba: %x\n", (u32) dev_desc->lba);
397 /* Setup the Protective MBR */
398 if (set_protective_mbr(dev_desc) < 0)
401 /* Generate CRC for the Primary GPT Header */
402 calc_crc32 = efi_crc32((const unsigned char *)gpt_e,
403 le32_to_cpu(gpt_h->num_partition_entries) *
404 le32_to_cpu(gpt_h->sizeof_partition_entry));
405 gpt_h->partition_entry_array_crc32 = cpu_to_le32(calc_crc32);
407 calc_crc32 = efi_crc32((const unsigned char *)gpt_h,
408 le32_to_cpu(gpt_h->header_size));
409 gpt_h->header_crc32 = cpu_to_le32(calc_crc32);
411 /* Write the First GPT to the block right after the Legacy MBR */
412 if (blk_dwrite(dev_desc, 1, 1, gpt_h) != 1)
415 if (blk_dwrite(dev_desc, le64_to_cpu(gpt_h->partition_entry_lba),
416 pte_blk_cnt, gpt_e) != pte_blk_cnt)
419 prepare_backup_gpt_header(gpt_h);
421 if (blk_dwrite(dev_desc, (lbaint_t)le64_to_cpu(gpt_h->last_usable_lba)
422 + 1, pte_blk_cnt, gpt_e) != pte_blk_cnt)
425 if (blk_dwrite(dev_desc, (lbaint_t)le64_to_cpu(gpt_h->my_lba), 1,
429 debug("GPT successfully written to block device!\n");
433 printf("** Can't write to device %d **\n", dev_desc->devnum);
437 int gpt_fill_pte(struct blk_desc *dev_desc,
438 gpt_header *gpt_h, gpt_entry *gpt_e,
439 disk_partition_t *partitions, int parts)
441 lbaint_t offset = (lbaint_t)le64_to_cpu(gpt_h->first_usable_lba);
442 lbaint_t last_usable_lba = (lbaint_t)
443 le64_to_cpu(gpt_h->last_usable_lba);
445 size_t efiname_len, dosname_len;
446 #if CONFIG_IS_ENABLED(PARTITION_UUIDS)
448 unsigned char *bin_uuid;
450 #ifdef CONFIG_PARTITION_TYPE_GUID
452 unsigned char *bin_type_guid;
454 size_t hdr_start = gpt_h->my_lba;
455 size_t hdr_end = hdr_start + 1;
457 size_t pte_start = gpt_h->partition_entry_lba;
458 size_t pte_end = pte_start +
459 gpt_h->num_partition_entries * gpt_h->sizeof_partition_entry /
462 for (i = 0; i < parts; i++) {
463 /* partition starting lba */
464 lbaint_t start = partitions[i].start;
465 lbaint_t size = partitions[i].size;
468 offset = start + size;
475 * If our partition overlaps with either the GPT
476 * header, or the partition entry, reject it.
478 if (((start < hdr_end && hdr_start < (start + size)) ||
479 (start < pte_end && pte_start < (start + size)))) {
480 printf("Partition overlap\n");
484 gpt_e[i].starting_lba = cpu_to_le64(start);
486 if (offset > (last_usable_lba + 1)) {
487 printf("Partitions layout exceds disk size\n");
490 /* partition ending lba */
491 if ((i == parts - 1) && (size == 0))
492 /* extend the last partition to maximuim */
493 gpt_e[i].ending_lba = gpt_h->last_usable_lba;
495 gpt_e[i].ending_lba = cpu_to_le64(offset - 1);
497 #ifdef CONFIG_PARTITION_TYPE_GUID
498 str_type_guid = partitions[i].type_guid;
499 bin_type_guid = gpt_e[i].partition_type_guid.b;
500 if (strlen(str_type_guid)) {
501 if (uuid_str_to_bin(str_type_guid, bin_type_guid,
502 UUID_STR_FORMAT_GUID)) {
503 printf("Partition no. %d: invalid type guid: %s\n",
508 /* default partition type GUID */
509 memcpy(bin_type_guid,
510 &partition_basic_data_guid, 16);
513 /* partition type GUID */
514 memcpy(gpt_e[i].partition_type_guid.b,
515 &partition_basic_data_guid, 16);
518 #if CONFIG_IS_ENABLED(PARTITION_UUIDS)
519 str_uuid = partitions[i].uuid;
520 bin_uuid = gpt_e[i].unique_partition_guid.b;
522 if (uuid_str_to_bin(str_uuid, bin_uuid, UUID_STR_FORMAT_GUID)) {
523 printf("Partition no. %d: invalid guid: %s\n",
529 /* partition attributes */
530 memset(&gpt_e[i].attributes, 0,
531 sizeof(gpt_entry_attributes));
533 if (partitions[i].bootable)
534 gpt_e[i].attributes.fields.legacy_bios_bootable = 1;
537 efiname_len = sizeof(gpt_e[i].partition_name)
538 / sizeof(efi_char16_t);
539 dosname_len = sizeof(partitions[i].name);
541 memset(gpt_e[i].partition_name, 0,
542 sizeof(gpt_e[i].partition_name));
544 for (k = 0; k < min(dosname_len, efiname_len); k++)
545 gpt_e[i].partition_name[k] =
546 (efi_char16_t)(partitions[i].name[k]);
548 debug("%s: name: %s offset[%d]: 0x" LBAF
549 " size[%d]: 0x" LBAF "\n",
550 __func__, partitions[i].name, i,
557 static uint32_t partition_entries_offset(struct blk_desc *dev_desc)
559 uint32_t offset_blks = 2;
560 uint32_t __maybe_unused offset_bytes;
561 int __maybe_unused config_offset;
563 #if defined(CONFIG_EFI_PARTITION_ENTRIES_OFF)
565 * Some architectures require their SPL loader at a fixed
566 * address within the first 16KB of the disk. To avoid an
567 * overlap with the partition entries of the EFI partition
568 * table, the first safe offset (in bytes, from the start of
569 * the disk) for the entries can be set in
570 * CONFIG_EFI_PARTITION_ENTRIES_OFF.
573 PAD_TO_BLOCKSIZE(CONFIG_EFI_PARTITION_ENTRIES_OFF, dev_desc);
574 offset_blks = offset_bytes / dev_desc->blksz;
577 #if defined(CONFIG_OF_CONTROL)
579 * Allow the offset of the first partition entires (in bytes
580 * from the start of the device) to be specified as a property
581 * of the device tree '/config' node.
583 config_offset = fdtdec_get_config_int(gd->fdt_blob,
584 "u-boot,efi-partition-entries-offset",
586 if (config_offset != -EINVAL) {
587 offset_bytes = PAD_TO_BLOCKSIZE(config_offset, dev_desc);
588 offset_blks = offset_bytes / dev_desc->blksz;
592 debug("efi: partition entries offset (in blocks): %d\n", offset_blks);
595 * The earliest LBA this can be at is LBA#2 (i.e. right behind
596 * the (protective) MBR and the GPT header.
604 int gpt_fill_header(struct blk_desc *dev_desc, gpt_header *gpt_h,
605 char *str_guid, int parts_count)
607 gpt_h->signature = cpu_to_le64(GPT_HEADER_SIGNATURE);
608 gpt_h->revision = cpu_to_le32(GPT_HEADER_REVISION_V1);
609 gpt_h->header_size = cpu_to_le32(sizeof(gpt_header));
610 gpt_h->my_lba = cpu_to_le64(1);
611 gpt_h->alternate_lba = cpu_to_le64(dev_desc->lba - 1);
612 gpt_h->last_usable_lba = cpu_to_le64(dev_desc->lba - 34);
613 gpt_h->partition_entry_lba =
614 cpu_to_le64(partition_entries_offset(dev_desc));
615 gpt_h->first_usable_lba =
616 cpu_to_le64(le64_to_cpu(gpt_h->partition_entry_lba) + 32);
617 gpt_h->num_partition_entries = cpu_to_le32(GPT_ENTRY_NUMBERS);
618 gpt_h->sizeof_partition_entry = cpu_to_le32(sizeof(gpt_entry));
619 gpt_h->header_crc32 = 0;
620 gpt_h->partition_entry_array_crc32 = 0;
622 if (uuid_str_to_bin(str_guid, gpt_h->disk_guid.b, UUID_STR_FORMAT_GUID))
628 int gpt_restore(struct blk_desc *dev_desc, char *str_disk_guid,
629 disk_partition_t *partitions, int parts_count)
635 size = PAD_TO_BLOCKSIZE(sizeof(gpt_header), dev_desc);
636 gpt_h = malloc_cache_aligned(size);
638 printf("%s: calloc failed!\n", __func__);
641 memset(gpt_h, 0, size);
643 size = PAD_TO_BLOCKSIZE(GPT_ENTRY_NUMBERS * sizeof(gpt_entry),
645 gpt_e = malloc_cache_aligned(size);
647 printf("%s: calloc failed!\n", __func__);
651 memset(gpt_e, 0, size);
653 /* Generate Primary GPT header (LBA1) */
654 ret = gpt_fill_header(dev_desc, gpt_h, str_disk_guid, parts_count);
658 /* Generate partition entries */
659 ret = gpt_fill_pte(dev_desc, gpt_h, gpt_e, partitions, parts_count);
663 /* Write GPT partition table */
664 ret = write_gpt_table(dev_desc, gpt_h, gpt_e);
672 static void gpt_convert_efi_name_to_char(char *s, efi_char16_t *es, int n)
674 char *ess = (char *)es;
679 for (i = 0, j = 0; j < n; i += 2, j++) {
686 int gpt_verify_headers(struct blk_desc *dev_desc, gpt_header *gpt_head,
690 * This function validates AND
691 * fills in the GPT header and PTE
693 if (is_gpt_valid(dev_desc,
694 GPT_PRIMARY_PARTITION_TABLE_LBA,
695 gpt_head, gpt_pte) != 1) {
696 printf("%s: *** ERROR: Invalid GPT ***\n",
700 if (is_gpt_valid(dev_desc, (dev_desc->lba - 1),
701 gpt_head, gpt_pte) != 1) {
702 printf("%s: *** ERROR: Invalid Backup GPT ***\n",
710 int gpt_verify_partitions(struct blk_desc *dev_desc,
711 disk_partition_t *partitions, int parts,
712 gpt_header *gpt_head, gpt_entry **gpt_pte)
714 char efi_str[PARTNAME_SZ + 1];
719 ret = gpt_verify_headers(dev_desc, gpt_head, gpt_pte);
725 for (i = 0; i < parts; i++) {
726 if (i == gpt_head->num_partition_entries) {
727 pr_err("More partitions than allowed!\n");
731 /* Check if GPT and ENV partition names match */
732 gpt_convert_efi_name_to_char(efi_str, gpt_e[i].partition_name,
735 debug("%s: part: %2d name - GPT: %16s, ENV: %16s ",
736 __func__, i, efi_str, partitions[i].name);
738 if (strncmp(efi_str, (char *)partitions[i].name,
739 sizeof(partitions->name))) {
740 pr_err("Partition name: %s does not match %s!\n",
741 efi_str, (char *)partitions[i].name);
745 /* Check if GPT and ENV sizes match */
746 gpt_part_size = le64_to_cpu(gpt_e[i].ending_lba) -
747 le64_to_cpu(gpt_e[i].starting_lba) + 1;
748 debug("size(LBA) - GPT: %8llu, ENV: %8llu ",
749 (unsigned long long)gpt_part_size,
750 (unsigned long long)partitions[i].size);
752 if (le64_to_cpu(gpt_part_size) != partitions[i].size) {
753 /* We do not check the extend partition size */
754 if ((i == parts - 1) && (partitions[i].size == 0))
757 pr_err("Partition %s size: %llu does not match %llu!\n",
758 efi_str, (unsigned long long)gpt_part_size,
759 (unsigned long long)partitions[i].size);
764 * Start address is optional - check only if provided
765 * in '$partition' variable
767 if (!partitions[i].start) {
772 /* Check if GPT and ENV start LBAs match */
773 debug("start LBA - GPT: %8llu, ENV: %8llu\n",
774 le64_to_cpu(gpt_e[i].starting_lba),
775 (unsigned long long)partitions[i].start);
777 if (le64_to_cpu(gpt_e[i].starting_lba) != partitions[i].start) {
778 pr_err("Partition %s start: %llu does not match %llu!\n",
779 efi_str, le64_to_cpu(gpt_e[i].starting_lba),
780 (unsigned long long)partitions[i].start);
788 int is_valid_gpt_buf(struct blk_desc *dev_desc, void *buf)
793 /* determine start of GPT Header in the buffer */
794 gpt_h = buf + (GPT_PRIMARY_PARTITION_TABLE_LBA *
796 if (validate_gpt_header(gpt_h, GPT_PRIMARY_PARTITION_TABLE_LBA,
800 /* determine start of GPT Entries in the buffer */
801 gpt_e = buf + (le64_to_cpu(gpt_h->partition_entry_lba) *
803 if (validate_gpt_entries(gpt_h, gpt_e))
809 int write_mbr_and_gpt_partitions(struct blk_desc *dev_desc, void *buf)
817 if (is_valid_gpt_buf(dev_desc, buf))
820 /* determine start of GPT Header in the buffer */
821 gpt_h = buf + (GPT_PRIMARY_PARTITION_TABLE_LBA *
824 /* determine start of GPT Entries in the buffer */
825 gpt_e = buf + (le64_to_cpu(gpt_h->partition_entry_lba) *
827 gpt_e_blk_cnt = BLOCK_CNT((le32_to_cpu(gpt_h->num_partition_entries) *
828 le32_to_cpu(gpt_h->sizeof_partition_entry)),
832 lba = 0; /* MBR is always at 0 */
833 cnt = 1; /* MBR (1 block) */
834 if (blk_dwrite(dev_desc, lba, cnt, buf) != cnt) {
835 printf("%s: failed writing '%s' (%d blks at 0x" LBAF ")\n",
836 __func__, "MBR", cnt, lba);
840 /* write Primary GPT */
841 lba = GPT_PRIMARY_PARTITION_TABLE_LBA;
842 cnt = 1; /* GPT Header (1 block) */
843 if (blk_dwrite(dev_desc, lba, cnt, gpt_h) != cnt) {
844 printf("%s: failed writing '%s' (%d blks at 0x" LBAF ")\n",
845 __func__, "Primary GPT Header", cnt, lba);
849 lba = le64_to_cpu(gpt_h->partition_entry_lba);
851 if (blk_dwrite(dev_desc, lba, cnt, gpt_e) != cnt) {
852 printf("%s: failed writing '%s' (%d blks at 0x" LBAF ")\n",
853 __func__, "Primary GPT Entries", cnt, lba);
857 prepare_backup_gpt_header(gpt_h);
859 /* write Backup GPT */
860 lba = le64_to_cpu(gpt_h->partition_entry_lba);
862 if (blk_dwrite(dev_desc, lba, cnt, gpt_e) != cnt) {
863 printf("%s: failed writing '%s' (%d blks at 0x" LBAF ")\n",
864 __func__, "Backup GPT Entries", cnt, lba);
868 lba = le64_to_cpu(gpt_h->my_lba);
869 cnt = 1; /* GPT Header (1 block) */
870 if (blk_dwrite(dev_desc, lba, cnt, gpt_h) != cnt) {
871 printf("%s: failed writing '%s' (%d blks at 0x" LBAF ")\n",
872 __func__, "Backup GPT Header", cnt, lba);
884 * pmbr_part_valid(): Check for EFI partition signature
886 * Returns: 1 if EFI GPT partition type is found.
888 static int pmbr_part_valid(struct partition *part)
890 if (part->sys_ind == EFI_PMBR_OSTYPE_EFI_GPT &&
891 get_unaligned_le32(&part->start_sect) == 1UL) {
899 * is_pmbr_valid(): test Protective MBR for validity
901 * Returns: 1 if PMBR is valid, 0 otherwise.
902 * Validity depends on two things:
903 * 1) MSDOS signature is in the last two bytes of the MBR
904 * 2) One partition of type 0xEE is found, checked by pmbr_part_valid()
906 static int is_pmbr_valid(legacy_mbr * mbr)
910 if (!mbr || le16_to_cpu(mbr->signature) != MSDOS_MBR_SIGNATURE)
913 for (i = 0; i < 4; i++) {
914 if (pmbr_part_valid(&mbr->partition_record[i])) {
922 * is_gpt_valid() - tests one GPT header and PTEs for validity
924 * lba is the logical block address of the GPT header to test
925 * gpt is a GPT header ptr, filled on return.
926 * ptes is a PTEs ptr, filled on return.
928 * Description: returns 1 if valid, 0 on error.
929 * If valid, returns pointers to PTEs.
931 static int is_gpt_valid(struct blk_desc *dev_desc, u64 lba,
932 gpt_header *pgpt_head, gpt_entry **pgpt_pte)
934 /* Confirm valid arguments prior to allocation. */
935 if (!dev_desc || !pgpt_head) {
936 printf("%s: Invalid Argument(s)\n", __func__);
940 ALLOC_CACHE_ALIGN_BUFFER_PAD(legacy_mbr, mbr, 1, dev_desc->blksz);
942 /* Read MBR Header from device */
943 if (blk_dread(dev_desc, 0, 1, (ulong *)mbr) != 1) {
944 printf("*** ERROR: Can't read MBR header ***\n");
948 /* Read GPT Header from device */
949 if (blk_dread(dev_desc, (lbaint_t)lba, 1, pgpt_head) != 1) {
950 printf("*** ERROR: Can't read GPT header ***\n");
954 if (validate_gpt_header(pgpt_head, (lbaint_t)lba, dev_desc->lba))
957 if (dev_desc->sig_type == SIG_TYPE_NONE) {
958 efi_guid_t empty = {};
959 if (memcmp(&pgpt_head->disk_guid, &empty, sizeof(empty))) {
960 dev_desc->sig_type = SIG_TYPE_GUID;
961 memcpy(&dev_desc->guid_sig, &pgpt_head->disk_guid,
963 } else if (mbr->unique_mbr_signature != 0) {
964 dev_desc->sig_type = SIG_TYPE_MBR;
965 dev_desc->mbr_sig = mbr->unique_mbr_signature;
969 /* Read and allocate Partition Table Entries */
970 *pgpt_pte = alloc_read_gpt_entries(dev_desc, pgpt_head);
971 if (*pgpt_pte == NULL) {
972 printf("GPT: Failed to allocate memory for PTE\n");
976 if (validate_gpt_entries(pgpt_head, *pgpt_pte)) {
981 /* We're done, all's well */
986 * alloc_read_gpt_entries(): reads partition entries from disk
990 * Description: Returns ptes on success, NULL on error.
991 * Allocates space for PTEs based on information found in @gpt.
992 * Notes: remember to free pte when you're done!
994 static gpt_entry *alloc_read_gpt_entries(struct blk_desc *dev_desc,
995 gpt_header *pgpt_head)
997 size_t count = 0, blk_cnt;
999 gpt_entry *pte = NULL;
1001 if (!dev_desc || !pgpt_head) {
1002 printf("%s: Invalid Argument(s)\n", __func__);
1006 count = le32_to_cpu(pgpt_head->num_partition_entries) *
1007 le32_to_cpu(pgpt_head->sizeof_partition_entry);
1009 debug("%s: count = %u * %u = %lu\n", __func__,
1010 (u32) le32_to_cpu(pgpt_head->num_partition_entries),
1011 (u32) le32_to_cpu(pgpt_head->sizeof_partition_entry),
1014 /* Allocate memory for PTE, remember to FREE */
1016 pte = memalign(ARCH_DMA_MINALIGN,
1017 PAD_TO_BLOCKSIZE(count, dev_desc));
1020 if (count == 0 || pte == NULL) {
1021 printf("%s: ERROR: Can't allocate %#lX bytes for GPT Entries\n",
1022 __func__, (ulong)count);
1026 /* Read GPT Entries from device */
1027 blk = le64_to_cpu(pgpt_head->partition_entry_lba);
1028 blk_cnt = BLOCK_CNT(count, dev_desc);
1029 if (blk_dread(dev_desc, blk, (lbaint_t)blk_cnt, pte) != blk_cnt) {
1030 printf("*** ERROR: Can't read GPT Entries ***\n");
1038 * is_pte_valid(): validates a single Partition Table Entry
1039 * @gpt_entry - Pointer to a single Partition Table Entry
1041 * Description: returns 1 if valid, 0 on error.
1043 static int is_pte_valid(gpt_entry * pte)
1045 efi_guid_t unused_guid;
1048 printf("%s: Invalid Argument(s)\n", __func__);
1052 /* Only one validation for now:
1053 * The GUID Partition Type != Unused Entry (ALL-ZERO)
1055 memset(unused_guid.b, 0, sizeof(unused_guid.b));
1057 if (memcmp(pte->partition_type_guid.b, unused_guid.b,
1058 sizeof(unused_guid.b)) == 0) {
1060 debug("%s: Found an unused PTE GUID at 0x%08X\n", __func__,
1061 (unsigned int)(uintptr_t)pte);
1070 * Add an 'a_' prefix so it comes before 'dos' in the linker list. We need to
1071 * check EFI first, since a DOS partition is often used as a 'protective MBR'
1074 U_BOOT_PART_TYPE(a_efi) = {
1076 .part_type = PART_TYPE_EFI,
1077 .max_entries = GPT_ENTRY_NUMBERS,
1078 .get_info = part_get_info_ptr(part_get_info_efi),
1079 .print = part_print_ptr(part_print_efi),
1080 .test = part_test_efi,