1 // SPDX-License-Identifier: GPL-2.0+
3 * Copyright (C) 2008 RuggedCom, Inc.
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 tebibytes
17 #include <asm/cache.h>
18 #include <asm/global_data.h>
19 #include <asm/unaligned.h>
26 #include <dm/ofnode.h>
27 #include <linux/compiler.h>
28 #include <linux/ctype.h>
29 #include <u-boot/crc.h>
31 /* GUID for basic data partitons */
32 #if CONFIG_IS_ENABLED(EFI_PARTITION)
33 static const efi_guid_t partition_basic_data_guid = PARTITION_BASIC_DATA_GUID;
37 * efi_crc32() - EFI version of crc32 function
38 * @buf: buffer to calculate crc32 of
39 * @len - length of buf
41 * Description: Returns EFI-style CRC32 value for @buf
43 static inline u32 efi_crc32(const void *buf, u32 len)
45 return crc32(0, buf, len);
49 * Private function prototypes
52 static int pmbr_part_valid(struct partition *part);
53 static int is_pmbr_valid(legacy_mbr * mbr);
54 static int is_gpt_valid(struct blk_desc *dev_desc, u64 lba,
55 gpt_header *pgpt_head, gpt_entry **pgpt_pte);
56 static gpt_entry *alloc_read_gpt_entries(struct blk_desc *dev_desc,
57 gpt_header *pgpt_head);
58 static int is_pte_valid(gpt_entry * pte);
59 static int find_valid_gpt(struct blk_desc *dev_desc, gpt_header *gpt_head,
60 gpt_entry **pgpt_pte);
62 static char *print_efiname(gpt_entry *pte)
64 static char name[PARTNAME_SZ + 1];
66 for (i = 0; i < PARTNAME_SZ; i++) {
68 c = pte->partition_name[i] & 0xff;
69 c = (c && !isprint(c)) ? '.' : c;
72 name[PARTNAME_SZ] = 0;
76 static const efi_guid_t system_guid = PARTITION_SYSTEM_GUID;
78 static int get_bootable(gpt_entry *p)
82 if (!memcmp(&p->partition_type_guid, &system_guid, sizeof(efi_guid_t)))
83 ret |= PART_EFI_SYSTEM_PARTITION;
84 if (p->attributes.fields.legacy_bios_bootable)
89 static int validate_gpt_header(gpt_header *gpt_h, lbaint_t lba,
92 uint32_t crc32_backup = 0;
95 /* Check the GPT header signature */
96 if (le64_to_cpu(gpt_h->signature) != GPT_HEADER_SIGNATURE_UBOOT) {
97 printf("%s signature is wrong: 0x%llX != 0x%llX\n",
98 "GUID Partition Table Header",
99 le64_to_cpu(gpt_h->signature),
100 GPT_HEADER_SIGNATURE_UBOOT);
104 /* Check the GUID Partition Table CRC */
105 memcpy(&crc32_backup, &gpt_h->header_crc32, sizeof(crc32_backup));
106 memset(&gpt_h->header_crc32, 0, sizeof(gpt_h->header_crc32));
108 calc_crc32 = efi_crc32((const unsigned char *)gpt_h,
109 le32_to_cpu(gpt_h->header_size));
111 memcpy(&gpt_h->header_crc32, &crc32_backup, sizeof(crc32_backup));
113 if (calc_crc32 != le32_to_cpu(crc32_backup)) {
114 printf("%s CRC is wrong: 0x%x != 0x%x\n",
115 "GUID Partition Table Header",
116 le32_to_cpu(crc32_backup), calc_crc32);
121 * Check that the my_lba entry points to the LBA that contains the GPT
123 if (le64_to_cpu(gpt_h->my_lba) != lba) {
124 printf("GPT: my_lba incorrect: %llX != " LBAF "\n",
125 le64_to_cpu(gpt_h->my_lba),
131 * Check that the first_usable_lba and that the last_usable_lba are
134 if (le64_to_cpu(gpt_h->first_usable_lba) > lastlba) {
135 printf("GPT: first_usable_lba incorrect: %llX > " LBAF "\n",
136 le64_to_cpu(gpt_h->first_usable_lba), lastlba);
139 if (le64_to_cpu(gpt_h->last_usable_lba) > lastlba) {
140 printf("GPT: last_usable_lba incorrect: %llX > " LBAF "\n",
141 le64_to_cpu(gpt_h->last_usable_lba), lastlba);
145 debug("GPT: first_usable_lba: %llX last_usable_lba: %llX last lba: "
146 LBAF "\n", le64_to_cpu(gpt_h->first_usable_lba),
147 le64_to_cpu(gpt_h->last_usable_lba), lastlba);
152 static int validate_gpt_entries(gpt_header *gpt_h, gpt_entry *gpt_e)
156 /* Check the GUID Partition Table Entry Array CRC */
157 calc_crc32 = efi_crc32((const unsigned char *)gpt_e,
158 le32_to_cpu(gpt_h->num_partition_entries) *
159 le32_to_cpu(gpt_h->sizeof_partition_entry));
161 if (calc_crc32 != le32_to_cpu(gpt_h->partition_entry_array_crc32)) {
162 printf("%s: 0x%x != 0x%x\n",
163 "GUID Partition Table Entry Array CRC is wrong",
164 le32_to_cpu(gpt_h->partition_entry_array_crc32),
172 static void prepare_backup_gpt_header(gpt_header *gpt_h)
177 /* recalculate the values for the Backup GPT Header */
178 val = le64_to_cpu(gpt_h->my_lba);
179 gpt_h->my_lba = gpt_h->alternate_lba;
180 gpt_h->alternate_lba = cpu_to_le64(val);
181 gpt_h->partition_entry_lba =
182 cpu_to_le64(le64_to_cpu(gpt_h->last_usable_lba) + 1);
183 gpt_h->header_crc32 = 0;
185 calc_crc32 = efi_crc32((const unsigned char *)gpt_h,
186 le32_to_cpu(gpt_h->header_size));
187 gpt_h->header_crc32 = cpu_to_le32(calc_crc32);
190 #if CONFIG_IS_ENABLED(EFI_PARTITION)
192 * Public Functions (include/part.h)
196 * UUID is displayed as 32 hexadecimal digits, in 5 groups,
197 * separated by hyphens, in the form 8-4-4-4-12 for a total of 36 characters
199 int get_disk_guid(struct blk_desc * dev_desc, char *guid)
201 ALLOC_CACHE_ALIGN_BUFFER_PAD(gpt_header, gpt_head, 1, dev_desc->blksz);
202 gpt_entry *gpt_pte = NULL;
203 unsigned char *guid_bin;
205 /* This function validates AND fills in the GPT header and PTE */
206 if (find_valid_gpt(dev_desc, gpt_head, &gpt_pte) != 1)
209 guid_bin = gpt_head->disk_guid.b;
210 uuid_bin_to_str(guid_bin, guid, UUID_STR_FORMAT_GUID);
212 /* Remember to free pte */
217 void part_print_efi(struct blk_desc *dev_desc)
219 ALLOC_CACHE_ALIGN_BUFFER_PAD(gpt_header, gpt_head, 1, dev_desc->blksz);
220 gpt_entry *gpt_pte = NULL;
224 /* This function validates AND fills in the GPT header and PTE */
225 if (find_valid_gpt(dev_desc, gpt_head, &gpt_pte) != 1)
228 debug("%s: gpt-entry at %p\n", __func__, gpt_pte);
230 printf("Part\tStart LBA\tEnd LBA\t\tName\n");
231 printf("\tAttributes\n");
232 printf("\tType GUID\n");
233 printf("\tPartition GUID\n");
235 for (i = 0; i < le32_to_cpu(gpt_head->num_partition_entries); i++) {
236 /* Skip invalid PTE */
237 if (!is_pte_valid(&gpt_pte[i]))
240 printf("%3d\t0x%08llx\t0x%08llx\t\"%s\"\n", (i + 1),
241 le64_to_cpu(gpt_pte[i].starting_lba),
242 le64_to_cpu(gpt_pte[i].ending_lba),
243 print_efiname(&gpt_pte[i]));
244 printf("\tattrs:\t0x%016llx\n", gpt_pte[i].attributes.raw);
245 uuid = (unsigned char *)gpt_pte[i].partition_type_guid.b;
246 if (CONFIG_IS_ENABLED(PARTITION_TYPE_GUID))
247 printf("\ttype:\t%pUl\n\t\t(%pUs)\n", uuid, uuid);
249 printf("\ttype:\t%pUl\n", uuid);
250 uuid = (unsigned char *)gpt_pte[i].unique_partition_guid.b;
251 printf("\tguid:\t%pUl\n", uuid);
254 /* Remember to free pte */
259 int part_get_info_efi(struct blk_desc *dev_desc, int part,
260 struct disk_partition *info)
262 ALLOC_CACHE_ALIGN_BUFFER_PAD(gpt_header, gpt_head, 1, dev_desc->blksz);
263 gpt_entry *gpt_pte = NULL;
265 /* "part" argument must be at least 1 */
267 printf("%s: Invalid Argument(s)\n", __func__);
271 /* This function validates AND fills in the GPT header and PTE */
272 if (find_valid_gpt(dev_desc, gpt_head, &gpt_pte) != 1)
275 if (part > le32_to_cpu(gpt_head->num_partition_entries) ||
276 !is_pte_valid(&gpt_pte[part - 1])) {
277 debug("%s: *** ERROR: Invalid partition number %d ***\n",
283 /* The 'lbaint_t' casting may limit the maximum disk size to 2 TB */
284 info->start = (lbaint_t)le64_to_cpu(gpt_pte[part - 1].starting_lba);
285 /* The ending LBA is inclusive, to calculate size, add 1 to it */
286 info->size = (lbaint_t)le64_to_cpu(gpt_pte[part - 1].ending_lba) + 1
288 info->blksz = dev_desc->blksz;
290 snprintf((char *)info->name, sizeof(info->name), "%s",
291 print_efiname(&gpt_pte[part - 1]));
292 strcpy((char *)info->type, "U-Boot");
293 info->bootable = get_bootable(&gpt_pte[part - 1]);
294 #if CONFIG_IS_ENABLED(PARTITION_UUIDS)
295 uuid_bin_to_str(gpt_pte[part - 1].unique_partition_guid.b, info->uuid,
296 UUID_STR_FORMAT_GUID);
298 #ifdef CONFIG_PARTITION_TYPE_GUID
299 uuid_bin_to_str(gpt_pte[part - 1].partition_type_guid.b,
300 info->type_guid, UUID_STR_FORMAT_GUID);
303 debug("%s: start 0x" LBAF ", size 0x" LBAF ", name %s\n", __func__,
304 info->start, info->size, info->name);
306 /* Remember to free pte */
311 static int part_test_efi(struct blk_desc *dev_desc)
313 ALLOC_CACHE_ALIGN_BUFFER_PAD(legacy_mbr, legacymbr, 1, dev_desc->blksz);
315 /* Read legacy MBR from block 0 and validate it */
316 if ((blk_dread(dev_desc, 0, 1, (ulong *)legacymbr) != 1)
317 || (is_pmbr_valid(legacymbr) != 1)) {
324 * set_protective_mbr(): Set the EFI protective MBR
325 * @param dev_desc - block device descriptor
327 * Return: - zero on success, otherwise error
329 static int set_protective_mbr(struct blk_desc *dev_desc)
331 /* Setup the Protective MBR */
332 ALLOC_CACHE_ALIGN_BUFFER_PAD(legacy_mbr, p_mbr, 1, dev_desc->blksz);
334 printf("%s: calloc failed!\n", __func__);
338 /* Read MBR to backup boot code if it exists */
339 if (blk_dread(dev_desc, 0, 1, p_mbr) != 1) {
340 pr_err("** Can't read from device %d **\n", dev_desc->devnum);
344 /* Clear all data in MBR except of backed up boot code */
345 memset((char *)p_mbr + MSDOS_MBR_BOOT_CODE_SIZE, 0, sizeof(*p_mbr) -
346 MSDOS_MBR_BOOT_CODE_SIZE);
348 /* Append signature */
349 p_mbr->signature = MSDOS_MBR_SIGNATURE;
350 p_mbr->partition_record[0].sys_ind = EFI_PMBR_OSTYPE_EFI_GPT;
351 p_mbr->partition_record[0].start_sect = 1;
352 p_mbr->partition_record[0].nr_sects = (u32) dev_desc->lba - 1;
354 /* Write MBR sector to the MMC device */
355 if (blk_dwrite(dev_desc, 0, 1, p_mbr) != 1) {
356 printf("** Can't write to device %d **\n",
364 int write_gpt_table(struct blk_desc *dev_desc,
365 gpt_header *gpt_h, gpt_entry *gpt_e)
367 const int pte_blk_cnt = BLOCK_CNT((gpt_h->num_partition_entries
368 * sizeof(gpt_entry)), dev_desc);
371 debug("max lba: %x\n", (u32) dev_desc->lba);
372 /* Setup the Protective MBR */
373 if (set_protective_mbr(dev_desc) < 0)
376 /* Generate CRC for the Primary GPT Header */
377 calc_crc32 = efi_crc32((const unsigned char *)gpt_e,
378 le32_to_cpu(gpt_h->num_partition_entries) *
379 le32_to_cpu(gpt_h->sizeof_partition_entry));
380 gpt_h->partition_entry_array_crc32 = cpu_to_le32(calc_crc32);
382 calc_crc32 = efi_crc32((const unsigned char *)gpt_h,
383 le32_to_cpu(gpt_h->header_size));
384 gpt_h->header_crc32 = cpu_to_le32(calc_crc32);
386 /* Write the First GPT to the block right after the Legacy MBR */
387 if (blk_dwrite(dev_desc, 1, 1, gpt_h) != 1)
390 if (blk_dwrite(dev_desc, le64_to_cpu(gpt_h->partition_entry_lba),
391 pte_blk_cnt, gpt_e) != pte_blk_cnt)
394 prepare_backup_gpt_header(gpt_h);
396 if (blk_dwrite(dev_desc, (lbaint_t)le64_to_cpu(gpt_h->last_usable_lba)
397 + 1, pte_blk_cnt, gpt_e) != pte_blk_cnt)
400 if (blk_dwrite(dev_desc, (lbaint_t)le64_to_cpu(gpt_h->my_lba), 1,
404 debug("GPT successfully written to block device!\n");
408 printf("** Can't write to device %d **\n", dev_desc->devnum);
412 int gpt_fill_pte(struct blk_desc *dev_desc,
413 gpt_header *gpt_h, gpt_entry *gpt_e,
414 struct disk_partition *partitions, int parts)
416 lbaint_t offset = (lbaint_t)le64_to_cpu(gpt_h->first_usable_lba);
417 lbaint_t last_usable_lba = (lbaint_t)
418 le64_to_cpu(gpt_h->last_usable_lba);
420 size_t efiname_len, dosname_len;
421 #if CONFIG_IS_ENABLED(PARTITION_UUIDS)
423 unsigned char *bin_uuid;
425 #ifdef CONFIG_PARTITION_TYPE_GUID
427 unsigned char *bin_type_guid;
429 size_t hdr_start = gpt_h->my_lba;
430 size_t hdr_end = hdr_start + 1;
432 size_t pte_start = gpt_h->partition_entry_lba;
433 size_t pte_end = pte_start +
434 gpt_h->num_partition_entries * gpt_h->sizeof_partition_entry /
437 for (i = 0; i < parts; i++) {
438 /* partition starting lba */
439 lbaint_t start = partitions[i].start;
440 lbaint_t size = partitions[i].size;
443 offset = start + size;
450 * If our partition overlaps with either the GPT
451 * header, or the partition entry, reject it.
453 if (((start < hdr_end && hdr_start < (start + size)) ||
454 (start < pte_end && pte_start < (start + size)))) {
455 printf("Partition overlap\n");
459 gpt_e[i].starting_lba = cpu_to_le64(start);
461 if (offset > (last_usable_lba + 1)) {
462 printf("Partitions layout exceds disk size\n");
465 /* partition ending lba */
466 if ((i == parts - 1) && (size == 0))
467 /* extend the last partition to maximuim */
468 gpt_e[i].ending_lba = gpt_h->last_usable_lba;
470 gpt_e[i].ending_lba = cpu_to_le64(offset - 1);
472 #ifdef CONFIG_PARTITION_TYPE_GUID
473 str_type_guid = partitions[i].type_guid;
474 bin_type_guid = gpt_e[i].partition_type_guid.b;
475 if (strlen(str_type_guid)) {
476 if (uuid_str_to_bin(str_type_guid, bin_type_guid,
477 UUID_STR_FORMAT_GUID)) {
478 printf("Partition no. %d: invalid type guid: %s\n",
483 /* default partition type GUID */
484 memcpy(bin_type_guid,
485 &partition_basic_data_guid, 16);
488 /* partition type GUID */
489 memcpy(gpt_e[i].partition_type_guid.b,
490 &partition_basic_data_guid, 16);
493 #if CONFIG_IS_ENABLED(PARTITION_UUIDS)
494 str_uuid = partitions[i].uuid;
495 bin_uuid = gpt_e[i].unique_partition_guid.b;
497 if (uuid_str_to_bin(str_uuid, bin_uuid, UUID_STR_FORMAT_GUID)) {
498 printf("Partition no. %d: invalid guid: %s\n",
504 /* partition attributes */
505 memset(&gpt_e[i].attributes, 0,
506 sizeof(gpt_entry_attributes));
508 if (partitions[i].bootable & PART_BOOTABLE)
509 gpt_e[i].attributes.fields.legacy_bios_bootable = 1;
512 efiname_len = sizeof(gpt_e[i].partition_name)
513 / sizeof(efi_char16_t);
514 dosname_len = sizeof(partitions[i].name);
516 memset(gpt_e[i].partition_name, 0,
517 sizeof(gpt_e[i].partition_name));
519 for (k = 0; k < min(dosname_len, efiname_len); k++)
520 gpt_e[i].partition_name[k] =
521 (efi_char16_t)(partitions[i].name[k]);
523 debug("%s: name: %s offset[%d]: 0x" LBAF
524 " size[%d]: 0x" LBAF "\n",
525 __func__, partitions[i].name, i,
532 static uint32_t partition_entries_offset(struct blk_desc *dev_desc)
534 uint32_t offset_blks = 2;
535 uint32_t __maybe_unused offset_bytes;
536 int __maybe_unused config_offset;
538 #if defined(CONFIG_EFI_PARTITION_ENTRIES_OFF)
540 * Some architectures require their SPL loader at a fixed
541 * address within the first 16KB of the disk. To avoid an
542 * overlap with the partition entries of the EFI partition
543 * table, the first safe offset (in bytes, from the start of
544 * the disk) for the entries can be set in
545 * CONFIG_EFI_PARTITION_ENTRIES_OFF.
548 PAD_TO_BLOCKSIZE(CONFIG_EFI_PARTITION_ENTRIES_OFF, dev_desc);
549 offset_blks = offset_bytes / dev_desc->blksz;
552 #if defined(CONFIG_OF_CONTROL)
554 * Allow the offset of the first partition entires (in bytes
555 * from the start of the device) to be specified as a property
556 * of the device tree '/config' node.
558 config_offset = ofnode_conf_read_int(
559 "u-boot,efi-partition-entries-offset", -EINVAL);
560 if (config_offset != -EINVAL) {
561 offset_bytes = PAD_TO_BLOCKSIZE(config_offset, dev_desc);
562 offset_blks = offset_bytes / dev_desc->blksz;
566 debug("efi: partition entries offset (in blocks): %d\n", offset_blks);
569 * The earliest LBA this can be at is LBA#2 (i.e. right behind
570 * the (protective) MBR and the GPT header.
578 int gpt_fill_header(struct blk_desc *dev_desc, gpt_header *gpt_h,
579 char *str_guid, int parts_count)
581 gpt_h->signature = cpu_to_le64(GPT_HEADER_SIGNATURE_UBOOT);
582 gpt_h->revision = cpu_to_le32(GPT_HEADER_REVISION_V1);
583 gpt_h->header_size = cpu_to_le32(sizeof(gpt_header));
584 gpt_h->my_lba = cpu_to_le64(1);
585 gpt_h->alternate_lba = cpu_to_le64(dev_desc->lba - 1);
586 gpt_h->last_usable_lba = cpu_to_le64(dev_desc->lba - 34);
587 gpt_h->partition_entry_lba =
588 cpu_to_le64(partition_entries_offset(dev_desc));
589 gpt_h->first_usable_lba =
590 cpu_to_le64(le64_to_cpu(gpt_h->partition_entry_lba) + 32);
591 gpt_h->num_partition_entries = cpu_to_le32(GPT_ENTRY_NUMBERS);
592 gpt_h->sizeof_partition_entry = cpu_to_le32(sizeof(gpt_entry));
593 gpt_h->header_crc32 = 0;
594 gpt_h->partition_entry_array_crc32 = 0;
596 if (uuid_str_to_bin(str_guid, gpt_h->disk_guid.b, UUID_STR_FORMAT_GUID))
602 int gpt_restore(struct blk_desc *dev_desc, char *str_disk_guid,
603 struct disk_partition *partitions, int parts_count)
609 size = PAD_TO_BLOCKSIZE(sizeof(gpt_header), dev_desc);
610 gpt_h = malloc_cache_aligned(size);
612 printf("%s: calloc failed!\n", __func__);
615 memset(gpt_h, 0, size);
617 size = PAD_TO_BLOCKSIZE(GPT_ENTRY_NUMBERS * sizeof(gpt_entry),
619 gpt_e = malloc_cache_aligned(size);
621 printf("%s: calloc failed!\n", __func__);
625 memset(gpt_e, 0, size);
627 /* Generate Primary GPT header (LBA1) */
628 ret = gpt_fill_header(dev_desc, gpt_h, str_disk_guid, parts_count);
632 /* Generate partition entries */
633 ret = gpt_fill_pte(dev_desc, gpt_h, gpt_e, partitions, parts_count);
637 /* Write GPT partition table */
638 ret = write_gpt_table(dev_desc, gpt_h, gpt_e);
647 * gpt_convert_efi_name_to_char() - convert u16 string to char string
649 * TODO: this conversion only supports ANSI characters
652 * @es: u16 string to be converted
653 * @n: size of target buffer
655 static void gpt_convert_efi_name_to_char(char *s, void *es, int n)
662 for (i = 0, j = 0; j < n; i += 2, j++) {
669 int gpt_verify_headers(struct blk_desc *dev_desc, gpt_header *gpt_head,
673 * This function validates AND
674 * fills in the GPT header and PTE
676 if (is_gpt_valid(dev_desc,
677 GPT_PRIMARY_PARTITION_TABLE_LBA,
678 gpt_head, gpt_pte) != 1) {
679 printf("%s: *** ERROR: Invalid GPT ***\n",
684 /* Free pte before allocating again */
688 * Check that the alternate_lba entry points to the last LBA
690 if (le64_to_cpu(gpt_head->alternate_lba) != (dev_desc->lba - 1)) {
691 printf("%s: *** ERROR: Misplaced Backup GPT ***\n",
696 if (is_gpt_valid(dev_desc, (dev_desc->lba - 1),
697 gpt_head, gpt_pte) != 1) {
698 printf("%s: *** ERROR: Invalid Backup GPT ***\n",
706 static void restore_primary_gpt_header(gpt_header *gpt_h, struct blk_desc *dev_desc)
711 /* recalculate the values for the Primary GPT Header */
712 val = le64_to_cpu(gpt_h->my_lba);
713 gpt_h->my_lba = gpt_h->alternate_lba;
714 gpt_h->alternate_lba = cpu_to_le64(val);
715 gpt_h->partition_entry_lba = cpu_to_le64(partition_entries_offset(dev_desc));
717 gpt_h->header_crc32 = 0;
719 calc_crc32 = efi_crc32((const unsigned char *)gpt_h,
720 le32_to_cpu(gpt_h->header_size));
721 gpt_h->header_crc32 = cpu_to_le32(calc_crc32);
724 static int write_one_gpt_table(struct blk_desc *dev_desc,
725 gpt_header *gpt_h, gpt_entry *gpt_e)
727 const int pte_blk_cnt = BLOCK_CNT((gpt_h->num_partition_entries
728 * sizeof(gpt_entry)), dev_desc);
732 start = le64_to_cpu(gpt_h->my_lba);
733 if (blk_dwrite(dev_desc, start, 1, gpt_h) != 1) {
738 start = le64_to_cpu(gpt_h->partition_entry_lba);
739 if (blk_dwrite(dev_desc, start, pte_blk_cnt, gpt_e) != pte_blk_cnt) {
748 int gpt_repair_headers(struct blk_desc *dev_desc)
750 ALLOC_CACHE_ALIGN_BUFFER_PAD(gpt_header, gpt_h1, 1, dev_desc->blksz);
751 ALLOC_CACHE_ALIGN_BUFFER_PAD(gpt_header, gpt_h2, 1, dev_desc->blksz);
752 gpt_entry *gpt_e1 = NULL, *gpt_e2 = NULL;
753 int is_gpt1_valid, is_gpt2_valid;
756 is_gpt1_valid = is_gpt_valid(dev_desc, GPT_PRIMARY_PARTITION_TABLE_LBA,
758 is_gpt2_valid = is_gpt_valid(dev_desc, dev_desc->lba - 1,
761 if (is_gpt1_valid && is_gpt2_valid) {
766 if (is_gpt1_valid && !is_gpt2_valid) {
767 prepare_backup_gpt_header(gpt_h1);
768 ret = write_one_gpt_table(dev_desc, gpt_h1, gpt_e1);
772 if (!is_gpt1_valid && is_gpt2_valid) {
773 restore_primary_gpt_header(gpt_h2, dev_desc);
774 ret = write_one_gpt_table(dev_desc, gpt_h2, gpt_e2);
778 if (!is_gpt1_valid && !is_gpt2_valid) {
792 int gpt_verify_partitions(struct blk_desc *dev_desc,
793 struct disk_partition *partitions, int parts,
794 gpt_header *gpt_head, gpt_entry **gpt_pte)
796 char efi_str[PARTNAME_SZ + 1];
801 ret = gpt_verify_headers(dev_desc, gpt_head, gpt_pte);
807 for (i = 0; i < parts; i++) {
808 if (i == gpt_head->num_partition_entries) {
809 pr_err("More partitions than allowed!\n");
813 /* Check if GPT and ENV partition names match */
814 gpt_convert_efi_name_to_char(efi_str, gpt_e[i].partition_name,
817 debug("%s: part: %2d name - GPT: %16s, ENV: %16s ",
818 __func__, i, efi_str, partitions[i].name);
820 if (strncmp(efi_str, (char *)partitions[i].name,
821 sizeof(partitions->name))) {
822 pr_err("Partition name: %s does not match %s!\n",
823 efi_str, (char *)partitions[i].name);
827 /* Check if GPT and ENV sizes match */
828 gpt_part_size = le64_to_cpu(gpt_e[i].ending_lba) -
829 le64_to_cpu(gpt_e[i].starting_lba) + 1;
830 debug("size(LBA) - GPT: %8llu, ENV: %8llu ",
831 (unsigned long long)gpt_part_size,
832 (unsigned long long)partitions[i].size);
834 if (le64_to_cpu(gpt_part_size) != partitions[i].size) {
835 /* We do not check the extend partition size */
836 if ((i == parts - 1) && (partitions[i].size == 0))
839 pr_err("Partition %s size: %llu does not match %llu!\n",
840 efi_str, (unsigned long long)gpt_part_size,
841 (unsigned long long)partitions[i].size);
846 * Start address is optional - check only if provided
847 * in '$partition' variable
849 if (!partitions[i].start) {
854 /* Check if GPT and ENV start LBAs match */
855 debug("start LBA - GPT: %8llu, ENV: %8llu\n",
856 le64_to_cpu(gpt_e[i].starting_lba),
857 (unsigned long long)partitions[i].start);
859 if (le64_to_cpu(gpt_e[i].starting_lba) != partitions[i].start) {
860 pr_err("Partition %s start: %llu does not match %llu!\n",
861 efi_str, le64_to_cpu(gpt_e[i].starting_lba),
862 (unsigned long long)partitions[i].start);
870 int is_valid_gpt_buf(struct blk_desc *dev_desc, void *buf)
875 /* determine start of GPT Header in the buffer */
876 gpt_h = buf + (GPT_PRIMARY_PARTITION_TABLE_LBA *
878 if (validate_gpt_header(gpt_h, GPT_PRIMARY_PARTITION_TABLE_LBA,
882 /* determine start of GPT Entries in the buffer */
883 gpt_e = buf + (le64_to_cpu(gpt_h->partition_entry_lba) *
885 if (validate_gpt_entries(gpt_h, gpt_e))
891 int write_mbr_and_gpt_partitions(struct blk_desc *dev_desc, void *buf)
899 if (is_valid_gpt_buf(dev_desc, buf))
902 /* determine start of GPT Header in the buffer */
903 gpt_h = buf + (GPT_PRIMARY_PARTITION_TABLE_LBA *
906 /* determine start of GPT Entries in the buffer */
907 gpt_e = buf + (le64_to_cpu(gpt_h->partition_entry_lba) *
909 gpt_e_blk_cnt = BLOCK_CNT((le32_to_cpu(gpt_h->num_partition_entries) *
910 le32_to_cpu(gpt_h->sizeof_partition_entry)),
914 lba = 0; /* MBR is always at 0 */
915 cnt = 1; /* MBR (1 block) */
916 if (blk_dwrite(dev_desc, lba, cnt, buf) != cnt) {
917 printf("%s: failed writing '%s' (%d blks at 0x" LBAF ")\n",
918 __func__, "MBR", cnt, lba);
922 /* write Primary GPT */
923 lba = GPT_PRIMARY_PARTITION_TABLE_LBA;
924 cnt = 1; /* GPT Header (1 block) */
925 if (blk_dwrite(dev_desc, lba, cnt, gpt_h) != cnt) {
926 printf("%s: failed writing '%s' (%d blks at 0x" LBAF ")\n",
927 __func__, "Primary GPT Header", cnt, lba);
931 lba = le64_to_cpu(gpt_h->partition_entry_lba);
933 if (blk_dwrite(dev_desc, lba, cnt, gpt_e) != cnt) {
934 printf("%s: failed writing '%s' (%d blks at 0x" LBAF ")\n",
935 __func__, "Primary GPT Entries", cnt, lba);
939 prepare_backup_gpt_header(gpt_h);
941 /* write Backup GPT */
942 lba = le64_to_cpu(gpt_h->partition_entry_lba);
944 if (blk_dwrite(dev_desc, lba, cnt, gpt_e) != cnt) {
945 printf("%s: failed writing '%s' (%d blks at 0x" LBAF ")\n",
946 __func__, "Backup GPT Entries", cnt, lba);
950 lba = le64_to_cpu(gpt_h->my_lba);
951 cnt = 1; /* GPT Header (1 block) */
952 if (blk_dwrite(dev_desc, lba, cnt, gpt_h) != cnt) {
953 printf("%s: failed writing '%s' (%d blks at 0x" LBAF ")\n",
954 __func__, "Backup GPT Header", cnt, lba);
958 /* Update the partition table entries*/
969 * pmbr_part_valid(): Check for EFI partition signature
971 * Returns: 1 if EFI GPT partition type is found.
973 static int pmbr_part_valid(struct partition *part)
975 if (part->sys_ind == EFI_PMBR_OSTYPE_EFI_GPT &&
976 get_unaligned_le32(&part->start_sect) == 1UL) {
984 * is_pmbr_valid(): test Protective MBR for validity
986 * Returns: 1 if PMBR is valid, 0 otherwise.
987 * Validity depends on two things:
988 * 1) MSDOS signature is in the last two bytes of the MBR
989 * 2) One partition of type 0xEE is found, checked by pmbr_part_valid()
991 static int is_pmbr_valid(legacy_mbr * mbr)
995 if (!mbr || le16_to_cpu(mbr->signature) != MSDOS_MBR_SIGNATURE)
998 for (i = 0; i < 4; i++) {
999 if (pmbr_part_valid(&mbr->partition_record[i])) {
1007 * is_gpt_valid() - tests one GPT header and PTEs for validity
1009 * lba is the logical block address of the GPT header to test
1010 * gpt is a GPT header ptr, filled on return.
1011 * ptes is a PTEs ptr, filled on return.
1013 * Description: returns 1 if valid, 0 on error, 2 if ignored header
1014 * If valid, returns pointers to PTEs.
1016 static int is_gpt_valid(struct blk_desc *dev_desc, u64 lba,
1017 gpt_header *pgpt_head, gpt_entry **pgpt_pte)
1019 /* Confirm valid arguments prior to allocation. */
1020 if (!dev_desc || !pgpt_head) {
1021 printf("%s: Invalid Argument(s)\n", __func__);
1025 ALLOC_CACHE_ALIGN_BUFFER_PAD(legacy_mbr, mbr, 1, dev_desc->blksz);
1027 /* Read MBR Header from device */
1028 if (blk_dread(dev_desc, 0, 1, (ulong *)mbr) != 1) {
1029 printf("*** ERROR: Can't read MBR header ***\n");
1033 /* Read GPT Header from device */
1034 if (blk_dread(dev_desc, (lbaint_t)lba, 1, pgpt_head) != 1) {
1035 printf("*** ERROR: Can't read GPT header ***\n");
1039 /* Invalid but nothing to yell about. */
1040 if (le64_to_cpu(pgpt_head->signature) == GPT_HEADER_CHROMEOS_IGNORE) {
1041 debug("ChromeOS 'IGNOREME' GPT header found and ignored\n");
1045 if (validate_gpt_header(pgpt_head, (lbaint_t)lba, dev_desc->lba))
1048 if (dev_desc->sig_type == SIG_TYPE_NONE) {
1049 efi_guid_t empty = {};
1050 if (memcmp(&pgpt_head->disk_guid, &empty, sizeof(empty))) {
1051 dev_desc->sig_type = SIG_TYPE_GUID;
1052 memcpy(&dev_desc->guid_sig, &pgpt_head->disk_guid,
1054 } else if (mbr->unique_mbr_signature != 0) {
1055 dev_desc->sig_type = SIG_TYPE_MBR;
1056 dev_desc->mbr_sig = mbr->unique_mbr_signature;
1060 /* Read and allocate Partition Table Entries */
1061 *pgpt_pte = alloc_read_gpt_entries(dev_desc, pgpt_head);
1065 if (validate_gpt_entries(pgpt_head, *pgpt_pte)) {
1070 /* We're done, all's well */
1075 * find_valid_gpt() - finds a valid GPT header and PTEs
1077 * gpt is a GPT header ptr, filled on return.
1078 * ptes is a PTEs ptr, filled on return.
1080 * Description: returns 1 if found a valid gpt, 0 on error.
1081 * If valid, returns pointers to PTEs.
1083 static int find_valid_gpt(struct blk_desc *dev_desc, gpt_header *gpt_head,
1084 gpt_entry **pgpt_pte)
1088 r = is_gpt_valid(dev_desc, GPT_PRIMARY_PARTITION_TABLE_LBA, gpt_head,
1093 printf("%s: *** ERROR: Invalid GPT ***\n", __func__);
1095 if (is_gpt_valid(dev_desc, (dev_desc->lba - 1), gpt_head,
1097 printf("%s: *** ERROR: Invalid Backup GPT ***\n",
1102 printf("%s: *** Using Backup GPT ***\n",
1109 * alloc_read_gpt_entries(): reads partition entries from disk
1113 * Description: Returns ptes on success, NULL on error.
1114 * Allocates space for PTEs based on information found in @gpt.
1115 * Notes: remember to free pte when you're done!
1117 static gpt_entry *alloc_read_gpt_entries(struct blk_desc *dev_desc,
1118 gpt_header *pgpt_head)
1120 size_t count = 0, blk_cnt;
1122 gpt_entry *pte = NULL;
1124 if (!dev_desc || !pgpt_head) {
1125 printf("%s: Invalid Argument(s)\n", __func__);
1129 count = le32_to_cpu(pgpt_head->num_partition_entries) *
1130 le32_to_cpu(pgpt_head->sizeof_partition_entry);
1132 debug("%s: count = %u * %u = %lu\n", __func__,
1133 (u32) le32_to_cpu(pgpt_head->num_partition_entries),
1134 (u32) le32_to_cpu(pgpt_head->sizeof_partition_entry),
1137 /* Allocate memory for PTE, remember to FREE */
1139 pte = memalign(ARCH_DMA_MINALIGN,
1140 PAD_TO_BLOCKSIZE(count, dev_desc));
1143 if (count == 0 || pte == NULL) {
1144 printf("%s: ERROR: Can't allocate %#lX bytes for GPT Entries\n",
1145 __func__, (ulong)count);
1149 /* Read GPT Entries from device */
1150 blk = le64_to_cpu(pgpt_head->partition_entry_lba);
1151 blk_cnt = BLOCK_CNT(count, dev_desc);
1152 if (blk_dread(dev_desc, blk, (lbaint_t)blk_cnt, pte) != blk_cnt) {
1153 printf("*** ERROR: Can't read GPT Entries ***\n");
1161 * is_pte_valid(): validates a single Partition Table Entry
1162 * @gpt_entry - Pointer to a single Partition Table Entry
1164 * Description: returns 1 if valid, 0 on error.
1166 static int is_pte_valid(gpt_entry * pte)
1168 efi_guid_t unused_guid;
1171 printf("%s: Invalid Argument(s)\n", __func__);
1175 /* Only one validation for now:
1176 * The GUID Partition Type != Unused Entry (ALL-ZERO)
1178 memset(unused_guid.b, 0, sizeof(unused_guid.b));
1180 if (memcmp(pte->partition_type_guid.b, unused_guid.b,
1181 sizeof(unused_guid.b)) == 0) {
1183 debug("%s: Found an unused PTE GUID at 0x%08X\n", __func__,
1184 (unsigned int)(uintptr_t)pte);
1193 * Add an 'a_' prefix so it comes before 'dos' in the linker list. We need to
1194 * check EFI first, since a DOS partition is often used as a 'protective MBR'
1197 U_BOOT_PART_TYPE(a_efi) = {
1199 .part_type = PART_TYPE_EFI,
1200 .max_entries = GPT_ENTRY_NUMBERS,
1201 .get_info = part_get_info_ptr(part_get_info_efi),
1202 .print = part_print_ptr(part_print_efi),
1203 .test = part_test_efi,