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
16 #include <asm/cache.h>
17 #include <asm/unaligned.h>
24 #include <linux/compiler.h>
25 #include <linux/ctype.h>
26 #include <u-boot/crc.h>
28 DECLARE_GLOBAL_DATA_PTR;
31 * GUID for basic data partions.
33 static const efi_guid_t partition_basic_data_guid = PARTITION_BASIC_DATA_GUID;
35 #ifdef CONFIG_HAVE_BLOCK_DEVICE
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;
222 char uuid[UUID_STR_LEN + 1];
223 unsigned char *uuid_bin;
225 /* This function validates AND fills in the GPT header and PTE */
226 if (find_valid_gpt(dev_desc, gpt_head, &gpt_pte) != 1)
229 debug("%s: gpt-entry at %p\n", __func__, gpt_pte);
231 printf("Part\tStart LBA\tEnd LBA\t\tName\n");
232 printf("\tAttributes\n");
233 printf("\tType GUID\n");
234 printf("\tPartition GUID\n");
236 for (i = 0; i < le32_to_cpu(gpt_head->num_partition_entries); i++) {
237 /* Stop at the first non valid PTE */
238 if (!is_pte_valid(&gpt_pte[i]))
241 printf("%3d\t0x%08llx\t0x%08llx\t\"%s\"\n", (i + 1),
242 le64_to_cpu(gpt_pte[i].starting_lba),
243 le64_to_cpu(gpt_pte[i].ending_lba),
244 print_efiname(&gpt_pte[i]));
245 printf("\tattrs:\t0x%016llx\n", gpt_pte[i].attributes.raw);
246 uuid_bin = (unsigned char *)gpt_pte[i].partition_type_guid.b;
247 uuid_bin_to_str(uuid_bin, uuid, UUID_STR_FORMAT_GUID);
248 printf("\ttype:\t%s\n", uuid);
249 #ifdef CONFIG_PARTITION_TYPE_GUID
250 if (!uuid_guid_get_str(uuid_bin, uuid))
251 printf("\ttype:\t%s\n", uuid);
253 uuid_bin = (unsigned char *)gpt_pte[i].unique_partition_guid.b;
254 uuid_bin_to_str(uuid_bin, uuid, UUID_STR_FORMAT_GUID);
255 printf("\tguid:\t%s\n", uuid);
258 /* Remember to free pte */
263 int part_get_info_efi(struct blk_desc *dev_desc, int part,
264 struct disk_partition *info)
266 ALLOC_CACHE_ALIGN_BUFFER_PAD(gpt_header, gpt_head, 1, dev_desc->blksz);
267 gpt_entry *gpt_pte = NULL;
269 /* "part" argument must be at least 1 */
271 printf("%s: Invalid Argument(s)\n", __func__);
275 /* This function validates AND fills in the GPT header and PTE */
276 if (find_valid_gpt(dev_desc, gpt_head, &gpt_pte) != 1)
279 if (part > le32_to_cpu(gpt_head->num_partition_entries) ||
280 !is_pte_valid(&gpt_pte[part - 1])) {
281 debug("%s: *** ERROR: Invalid partition number %d ***\n",
287 /* The 'lbaint_t' casting may limit the maximum disk size to 2 TB */
288 info->start = (lbaint_t)le64_to_cpu(gpt_pte[part - 1].starting_lba);
289 /* The ending LBA is inclusive, to calculate size, add 1 to it */
290 info->size = (lbaint_t)le64_to_cpu(gpt_pte[part - 1].ending_lba) + 1
292 info->blksz = dev_desc->blksz;
294 snprintf((char *)info->name, sizeof(info->name), "%s",
295 print_efiname(&gpt_pte[part - 1]));
296 strcpy((char *)info->type, "U-Boot");
297 info->bootable = get_bootable(&gpt_pte[part - 1]);
298 #if CONFIG_IS_ENABLED(PARTITION_UUIDS)
299 uuid_bin_to_str(gpt_pte[part - 1].unique_partition_guid.b, info->uuid,
300 UUID_STR_FORMAT_GUID);
302 #ifdef CONFIG_PARTITION_TYPE_GUID
303 uuid_bin_to_str(gpt_pte[part - 1].partition_type_guid.b,
304 info->type_guid, UUID_STR_FORMAT_GUID);
307 debug("%s: start 0x" LBAF ", size 0x" LBAF ", name %s\n", __func__,
308 info->start, info->size, info->name);
310 /* Remember to free pte */
315 static int part_test_efi(struct blk_desc *dev_desc)
317 ALLOC_CACHE_ALIGN_BUFFER_PAD(legacy_mbr, legacymbr, 1, dev_desc->blksz);
319 /* Read legacy MBR from block 0 and validate it */
320 if ((blk_dread(dev_desc, 0, 1, (ulong *)legacymbr) != 1)
321 || (is_pmbr_valid(legacymbr) != 1)) {
328 * set_protective_mbr(): Set the EFI protective MBR
329 * @param dev_desc - block device descriptor
331 * @return - zero on success, otherwise error
333 static int set_protective_mbr(struct blk_desc *dev_desc)
335 /* Setup the Protective MBR */
336 ALLOC_CACHE_ALIGN_BUFFER_PAD(legacy_mbr, p_mbr, 1, dev_desc->blksz);
338 printf("%s: calloc failed!\n", __func__);
342 /* Read MBR to backup boot code if it exists */
343 if (blk_dread(dev_desc, 0, 1, p_mbr) != 1) {
344 pr_err("** Can't read from device %d **\n", dev_desc->devnum);
348 /* Clear all data in MBR except of backed up boot code */
349 memset((char *)p_mbr + MSDOS_MBR_BOOT_CODE_SIZE, 0, sizeof(*p_mbr) -
350 MSDOS_MBR_BOOT_CODE_SIZE);
352 /* Append signature */
353 p_mbr->signature = MSDOS_MBR_SIGNATURE;
354 p_mbr->partition_record[0].sys_ind = EFI_PMBR_OSTYPE_EFI_GPT;
355 p_mbr->partition_record[0].start_sect = 1;
356 p_mbr->partition_record[0].nr_sects = (u32) dev_desc->lba - 1;
358 /* Write MBR sector to the MMC device */
359 if (blk_dwrite(dev_desc, 0, 1, p_mbr) != 1) {
360 printf("** Can't write to device %d **\n",
368 int write_gpt_table(struct blk_desc *dev_desc,
369 gpt_header *gpt_h, gpt_entry *gpt_e)
371 const int pte_blk_cnt = BLOCK_CNT((gpt_h->num_partition_entries
372 * sizeof(gpt_entry)), dev_desc);
375 debug("max lba: %x\n", (u32) dev_desc->lba);
376 /* Setup the Protective MBR */
377 if (set_protective_mbr(dev_desc) < 0)
380 /* Generate CRC for the Primary GPT Header */
381 calc_crc32 = efi_crc32((const unsigned char *)gpt_e,
382 le32_to_cpu(gpt_h->num_partition_entries) *
383 le32_to_cpu(gpt_h->sizeof_partition_entry));
384 gpt_h->partition_entry_array_crc32 = cpu_to_le32(calc_crc32);
386 calc_crc32 = efi_crc32((const unsigned char *)gpt_h,
387 le32_to_cpu(gpt_h->header_size));
388 gpt_h->header_crc32 = cpu_to_le32(calc_crc32);
390 /* Write the First GPT to the block right after the Legacy MBR */
391 if (blk_dwrite(dev_desc, 1, 1, gpt_h) != 1)
394 if (blk_dwrite(dev_desc, le64_to_cpu(gpt_h->partition_entry_lba),
395 pte_blk_cnt, gpt_e) != pte_blk_cnt)
398 prepare_backup_gpt_header(gpt_h);
400 if (blk_dwrite(dev_desc, (lbaint_t)le64_to_cpu(gpt_h->last_usable_lba)
401 + 1, pte_blk_cnt, gpt_e) != pte_blk_cnt)
404 if (blk_dwrite(dev_desc, (lbaint_t)le64_to_cpu(gpt_h->my_lba), 1,
408 debug("GPT successfully written to block device!\n");
412 printf("** Can't write to device %d **\n", dev_desc->devnum);
416 int gpt_fill_pte(struct blk_desc *dev_desc,
417 gpt_header *gpt_h, gpt_entry *gpt_e,
418 struct disk_partition *partitions, int parts)
420 lbaint_t offset = (lbaint_t)le64_to_cpu(gpt_h->first_usable_lba);
421 lbaint_t last_usable_lba = (lbaint_t)
422 le64_to_cpu(gpt_h->last_usable_lba);
424 size_t efiname_len, dosname_len;
425 #if CONFIG_IS_ENABLED(PARTITION_UUIDS)
427 unsigned char *bin_uuid;
429 #ifdef CONFIG_PARTITION_TYPE_GUID
431 unsigned char *bin_type_guid;
433 size_t hdr_start = gpt_h->my_lba;
434 size_t hdr_end = hdr_start + 1;
436 size_t pte_start = gpt_h->partition_entry_lba;
437 size_t pte_end = pte_start +
438 gpt_h->num_partition_entries * gpt_h->sizeof_partition_entry /
441 for (i = 0; i < parts; i++) {
442 /* partition starting lba */
443 lbaint_t start = partitions[i].start;
444 lbaint_t size = partitions[i].size;
447 offset = start + size;
454 * If our partition overlaps with either the GPT
455 * header, or the partition entry, reject it.
457 if (((start < hdr_end && hdr_start < (start + size)) ||
458 (start < pte_end && pte_start < (start + size)))) {
459 printf("Partition overlap\n");
463 gpt_e[i].starting_lba = cpu_to_le64(start);
465 if (offset > (last_usable_lba + 1)) {
466 printf("Partitions layout exceds disk size\n");
469 /* partition ending lba */
470 if ((i == parts - 1) && (size == 0))
471 /* extend the last partition to maximuim */
472 gpt_e[i].ending_lba = gpt_h->last_usable_lba;
474 gpt_e[i].ending_lba = cpu_to_le64(offset - 1);
476 #ifdef CONFIG_PARTITION_TYPE_GUID
477 str_type_guid = partitions[i].type_guid;
478 bin_type_guid = gpt_e[i].partition_type_guid.b;
479 if (strlen(str_type_guid)) {
480 if (uuid_str_to_bin(str_type_guid, bin_type_guid,
481 UUID_STR_FORMAT_GUID)) {
482 printf("Partition no. %d: invalid type guid: %s\n",
487 /* default partition type GUID */
488 memcpy(bin_type_guid,
489 &partition_basic_data_guid, 16);
492 /* partition type GUID */
493 memcpy(gpt_e[i].partition_type_guid.b,
494 &partition_basic_data_guid, 16);
497 #if CONFIG_IS_ENABLED(PARTITION_UUIDS)
498 str_uuid = partitions[i].uuid;
499 bin_uuid = gpt_e[i].unique_partition_guid.b;
501 if (uuid_str_to_bin(str_uuid, bin_uuid, UUID_STR_FORMAT_GUID)) {
502 printf("Partition no. %d: invalid guid: %s\n",
508 /* partition attributes */
509 memset(&gpt_e[i].attributes, 0,
510 sizeof(gpt_entry_attributes));
512 if (partitions[i].bootable & PART_BOOTABLE)
513 gpt_e[i].attributes.fields.legacy_bios_bootable = 1;
516 efiname_len = sizeof(gpt_e[i].partition_name)
517 / sizeof(efi_char16_t);
518 dosname_len = sizeof(partitions[i].name);
520 memset(gpt_e[i].partition_name, 0,
521 sizeof(gpt_e[i].partition_name));
523 for (k = 0; k < min(dosname_len, efiname_len); k++)
524 gpt_e[i].partition_name[k] =
525 (efi_char16_t)(partitions[i].name[k]);
527 debug("%s: name: %s offset[%d]: 0x" LBAF
528 " size[%d]: 0x" LBAF "\n",
529 __func__, partitions[i].name, i,
536 static uint32_t partition_entries_offset(struct blk_desc *dev_desc)
538 uint32_t offset_blks = 2;
539 uint32_t __maybe_unused offset_bytes;
540 int __maybe_unused config_offset;
542 #if defined(CONFIG_EFI_PARTITION_ENTRIES_OFF)
544 * Some architectures require their SPL loader at a fixed
545 * address within the first 16KB of the disk. To avoid an
546 * overlap with the partition entries of the EFI partition
547 * table, the first safe offset (in bytes, from the start of
548 * the disk) for the entries can be set in
549 * CONFIG_EFI_PARTITION_ENTRIES_OFF.
552 PAD_TO_BLOCKSIZE(CONFIG_EFI_PARTITION_ENTRIES_OFF, dev_desc);
553 offset_blks = offset_bytes / dev_desc->blksz;
556 #if defined(CONFIG_OF_CONTROL)
558 * Allow the offset of the first partition entires (in bytes
559 * from the start of the device) to be specified as a property
560 * of the device tree '/config' node.
562 config_offset = fdtdec_get_config_int(gd->fdt_blob,
563 "u-boot,efi-partition-entries-offset",
565 if (config_offset != -EINVAL) {
566 offset_bytes = PAD_TO_BLOCKSIZE(config_offset, dev_desc);
567 offset_blks = offset_bytes / dev_desc->blksz;
571 debug("efi: partition entries offset (in blocks): %d\n", offset_blks);
574 * The earliest LBA this can be at is LBA#2 (i.e. right behind
575 * the (protective) MBR and the GPT header.
583 int gpt_fill_header(struct blk_desc *dev_desc, gpt_header *gpt_h,
584 char *str_guid, int parts_count)
586 gpt_h->signature = cpu_to_le64(GPT_HEADER_SIGNATURE_UBOOT);
587 gpt_h->revision = cpu_to_le32(GPT_HEADER_REVISION_V1);
588 gpt_h->header_size = cpu_to_le32(sizeof(gpt_header));
589 gpt_h->my_lba = cpu_to_le64(1);
590 gpt_h->alternate_lba = cpu_to_le64(dev_desc->lba - 1);
591 gpt_h->last_usable_lba = cpu_to_le64(dev_desc->lba - 34);
592 gpt_h->partition_entry_lba =
593 cpu_to_le64(partition_entries_offset(dev_desc));
594 gpt_h->first_usable_lba =
595 cpu_to_le64(le64_to_cpu(gpt_h->partition_entry_lba) + 32);
596 gpt_h->num_partition_entries = cpu_to_le32(GPT_ENTRY_NUMBERS);
597 gpt_h->sizeof_partition_entry = cpu_to_le32(sizeof(gpt_entry));
598 gpt_h->header_crc32 = 0;
599 gpt_h->partition_entry_array_crc32 = 0;
601 if (uuid_str_to_bin(str_guid, gpt_h->disk_guid.b, UUID_STR_FORMAT_GUID))
607 int gpt_restore(struct blk_desc *dev_desc, char *str_disk_guid,
608 struct disk_partition *partitions, int parts_count)
614 size = PAD_TO_BLOCKSIZE(sizeof(gpt_header), dev_desc);
615 gpt_h = malloc_cache_aligned(size);
617 printf("%s: calloc failed!\n", __func__);
620 memset(gpt_h, 0, size);
622 size = PAD_TO_BLOCKSIZE(GPT_ENTRY_NUMBERS * sizeof(gpt_entry),
624 gpt_e = malloc_cache_aligned(size);
626 printf("%s: calloc failed!\n", __func__);
630 memset(gpt_e, 0, size);
632 /* Generate Primary GPT header (LBA1) */
633 ret = gpt_fill_header(dev_desc, gpt_h, str_disk_guid, parts_count);
637 /* Generate partition entries */
638 ret = gpt_fill_pte(dev_desc, gpt_h, gpt_e, partitions, parts_count);
642 /* Write GPT partition table */
643 ret = write_gpt_table(dev_desc, gpt_h, gpt_e);
652 * gpt_convert_efi_name_to_char() - convert u16 string to char string
654 * TODO: this conversion only supports ANSI characters
657 * @es: u16 string to be converted
658 * @n: size of target buffer
660 static void gpt_convert_efi_name_to_char(char *s, void *es, int n)
667 for (i = 0, j = 0; j < n; i += 2, j++) {
674 int gpt_verify_headers(struct blk_desc *dev_desc, gpt_header *gpt_head,
678 * This function validates AND
679 * fills in the GPT header and PTE
681 if (is_gpt_valid(dev_desc,
682 GPT_PRIMARY_PARTITION_TABLE_LBA,
683 gpt_head, gpt_pte) != 1) {
684 printf("%s: *** ERROR: Invalid GPT ***\n",
689 /* Free pte before allocating again */
692 if (is_gpt_valid(dev_desc, (dev_desc->lba - 1),
693 gpt_head, gpt_pte) != 1) {
694 printf("%s: *** ERROR: Invalid Backup GPT ***\n",
702 int gpt_verify_partitions(struct blk_desc *dev_desc,
703 struct disk_partition *partitions, int parts,
704 gpt_header *gpt_head, gpt_entry **gpt_pte)
706 char efi_str[PARTNAME_SZ + 1];
711 ret = gpt_verify_headers(dev_desc, gpt_head, gpt_pte);
717 for (i = 0; i < parts; i++) {
718 if (i == gpt_head->num_partition_entries) {
719 pr_err("More partitions than allowed!\n");
723 /* Check if GPT and ENV partition names match */
724 gpt_convert_efi_name_to_char(efi_str, gpt_e[i].partition_name,
727 debug("%s: part: %2d name - GPT: %16s, ENV: %16s ",
728 __func__, i, efi_str, partitions[i].name);
730 if (strncmp(efi_str, (char *)partitions[i].name,
731 sizeof(partitions->name))) {
732 pr_err("Partition name: %s does not match %s!\n",
733 efi_str, (char *)partitions[i].name);
737 /* Check if GPT and ENV sizes match */
738 gpt_part_size = le64_to_cpu(gpt_e[i].ending_lba) -
739 le64_to_cpu(gpt_e[i].starting_lba) + 1;
740 debug("size(LBA) - GPT: %8llu, ENV: %8llu ",
741 (unsigned long long)gpt_part_size,
742 (unsigned long long)partitions[i].size);
744 if (le64_to_cpu(gpt_part_size) != partitions[i].size) {
745 /* We do not check the extend partition size */
746 if ((i == parts - 1) && (partitions[i].size == 0))
749 pr_err("Partition %s size: %llu does not match %llu!\n",
750 efi_str, (unsigned long long)gpt_part_size,
751 (unsigned long long)partitions[i].size);
756 * Start address is optional - check only if provided
757 * in '$partition' variable
759 if (!partitions[i].start) {
764 /* Check if GPT and ENV start LBAs match */
765 debug("start LBA - GPT: %8llu, ENV: %8llu\n",
766 le64_to_cpu(gpt_e[i].starting_lba),
767 (unsigned long long)partitions[i].start);
769 if (le64_to_cpu(gpt_e[i].starting_lba) != partitions[i].start) {
770 pr_err("Partition %s start: %llu does not match %llu!\n",
771 efi_str, le64_to_cpu(gpt_e[i].starting_lba),
772 (unsigned long long)partitions[i].start);
780 int is_valid_gpt_buf(struct blk_desc *dev_desc, void *buf)
785 /* determine start of GPT Header in the buffer */
786 gpt_h = buf + (GPT_PRIMARY_PARTITION_TABLE_LBA *
788 if (validate_gpt_header(gpt_h, GPT_PRIMARY_PARTITION_TABLE_LBA,
792 /* determine start of GPT Entries in the buffer */
793 gpt_e = buf + (le64_to_cpu(gpt_h->partition_entry_lba) *
795 if (validate_gpt_entries(gpt_h, gpt_e))
801 int write_mbr_and_gpt_partitions(struct blk_desc *dev_desc, void *buf)
809 if (is_valid_gpt_buf(dev_desc, buf))
812 /* determine start of GPT Header in the buffer */
813 gpt_h = buf + (GPT_PRIMARY_PARTITION_TABLE_LBA *
816 /* determine start of GPT Entries in the buffer */
817 gpt_e = buf + (le64_to_cpu(gpt_h->partition_entry_lba) *
819 gpt_e_blk_cnt = BLOCK_CNT((le32_to_cpu(gpt_h->num_partition_entries) *
820 le32_to_cpu(gpt_h->sizeof_partition_entry)),
824 lba = 0; /* MBR is always at 0 */
825 cnt = 1; /* MBR (1 block) */
826 if (blk_dwrite(dev_desc, lba, cnt, buf) != cnt) {
827 printf("%s: failed writing '%s' (%d blks at 0x" LBAF ")\n",
828 __func__, "MBR", cnt, lba);
832 /* write Primary GPT */
833 lba = GPT_PRIMARY_PARTITION_TABLE_LBA;
834 cnt = 1; /* GPT Header (1 block) */
835 if (blk_dwrite(dev_desc, lba, cnt, gpt_h) != cnt) {
836 printf("%s: failed writing '%s' (%d blks at 0x" LBAF ")\n",
837 __func__, "Primary GPT Header", cnt, lba);
841 lba = le64_to_cpu(gpt_h->partition_entry_lba);
843 if (blk_dwrite(dev_desc, lba, cnt, gpt_e) != cnt) {
844 printf("%s: failed writing '%s' (%d blks at 0x" LBAF ")\n",
845 __func__, "Primary GPT Entries", cnt, lba);
849 prepare_backup_gpt_header(gpt_h);
851 /* write Backup GPT */
852 lba = le64_to_cpu(gpt_h->partition_entry_lba);
854 if (blk_dwrite(dev_desc, lba, cnt, gpt_e) != cnt) {
855 printf("%s: failed writing '%s' (%d blks at 0x" LBAF ")\n",
856 __func__, "Backup GPT Entries", cnt, lba);
860 lba = le64_to_cpu(gpt_h->my_lba);
861 cnt = 1; /* GPT Header (1 block) */
862 if (blk_dwrite(dev_desc, lba, cnt, gpt_h) != cnt) {
863 printf("%s: failed writing '%s' (%d blks at 0x" LBAF ")\n",
864 __func__, "Backup GPT Header", cnt, lba);
876 * pmbr_part_valid(): Check for EFI partition signature
878 * Returns: 1 if EFI GPT partition type is found.
880 static int pmbr_part_valid(struct partition *part)
882 if (part->sys_ind == EFI_PMBR_OSTYPE_EFI_GPT &&
883 get_unaligned_le32(&part->start_sect) == 1UL) {
891 * is_pmbr_valid(): test Protective MBR for validity
893 * Returns: 1 if PMBR is valid, 0 otherwise.
894 * Validity depends on two things:
895 * 1) MSDOS signature is in the last two bytes of the MBR
896 * 2) One partition of type 0xEE is found, checked by pmbr_part_valid()
898 static int is_pmbr_valid(legacy_mbr * mbr)
902 if (!mbr || le16_to_cpu(mbr->signature) != MSDOS_MBR_SIGNATURE)
905 for (i = 0; i < 4; i++) {
906 if (pmbr_part_valid(&mbr->partition_record[i])) {
914 * is_gpt_valid() - tests one GPT header and PTEs for validity
916 * lba is the logical block address of the GPT header to test
917 * gpt is a GPT header ptr, filled on return.
918 * ptes is a PTEs ptr, filled on return.
920 * Description: returns 1 if valid, 0 on error, 2 if ignored header
921 * If valid, returns pointers to PTEs.
923 static int is_gpt_valid(struct blk_desc *dev_desc, u64 lba,
924 gpt_header *pgpt_head, gpt_entry **pgpt_pte)
926 /* Confirm valid arguments prior to allocation. */
927 if (!dev_desc || !pgpt_head) {
928 printf("%s: Invalid Argument(s)\n", __func__);
932 ALLOC_CACHE_ALIGN_BUFFER_PAD(legacy_mbr, mbr, 1, dev_desc->blksz);
934 /* Read MBR Header from device */
935 if (blk_dread(dev_desc, 0, 1, (ulong *)mbr) != 1) {
936 printf("*** ERROR: Can't read MBR header ***\n");
940 /* Read GPT Header from device */
941 if (blk_dread(dev_desc, (lbaint_t)lba, 1, pgpt_head) != 1) {
942 printf("*** ERROR: Can't read GPT header ***\n");
946 /* Invalid but nothing to yell about. */
947 if (le64_to_cpu(pgpt_head->signature) == GPT_HEADER_CHROMEOS_IGNORE) {
948 debug("ChromeOS 'IGNOREME' GPT header found and ignored\n");
952 if (validate_gpt_header(pgpt_head, (lbaint_t)lba, dev_desc->lba))
955 if (dev_desc->sig_type == SIG_TYPE_NONE) {
956 efi_guid_t empty = {};
957 if (memcmp(&pgpt_head->disk_guid, &empty, sizeof(empty))) {
958 dev_desc->sig_type = SIG_TYPE_GUID;
959 memcpy(&dev_desc->guid_sig, &pgpt_head->disk_guid,
961 } else if (mbr->unique_mbr_signature != 0) {
962 dev_desc->sig_type = SIG_TYPE_MBR;
963 dev_desc->mbr_sig = mbr->unique_mbr_signature;
967 /* Read and allocate Partition Table Entries */
968 *pgpt_pte = alloc_read_gpt_entries(dev_desc, pgpt_head);
969 if (*pgpt_pte == NULL) {
970 printf("GPT: Failed to allocate memory for PTE\n");
974 if (validate_gpt_entries(pgpt_head, *pgpt_pte)) {
979 /* We're done, all's well */
984 * find_valid_gpt() - finds a valid GPT header and PTEs
986 * gpt is a GPT header ptr, filled on return.
987 * ptes is a PTEs ptr, filled on return.
989 * Description: returns 1 if found a valid gpt, 0 on error.
990 * If valid, returns pointers to PTEs.
992 static int find_valid_gpt(struct blk_desc *dev_desc, gpt_header *gpt_head,
993 gpt_entry **pgpt_pte)
997 r = is_gpt_valid(dev_desc, GPT_PRIMARY_PARTITION_TABLE_LBA, gpt_head,
1002 printf("%s: *** ERROR: Invalid GPT ***\n", __func__);
1004 if (is_gpt_valid(dev_desc, (dev_desc->lba - 1), gpt_head,
1006 printf("%s: *** ERROR: Invalid Backup GPT ***\n",
1011 printf("%s: *** Using Backup GPT ***\n",
1018 * alloc_read_gpt_entries(): reads partition entries from disk
1022 * Description: Returns ptes on success, NULL on error.
1023 * Allocates space for PTEs based on information found in @gpt.
1024 * Notes: remember to free pte when you're done!
1026 static gpt_entry *alloc_read_gpt_entries(struct blk_desc *dev_desc,
1027 gpt_header *pgpt_head)
1029 size_t count = 0, blk_cnt;
1031 gpt_entry *pte = NULL;
1033 if (!dev_desc || !pgpt_head) {
1034 printf("%s: Invalid Argument(s)\n", __func__);
1038 count = le32_to_cpu(pgpt_head->num_partition_entries) *
1039 le32_to_cpu(pgpt_head->sizeof_partition_entry);
1041 debug("%s: count = %u * %u = %lu\n", __func__,
1042 (u32) le32_to_cpu(pgpt_head->num_partition_entries),
1043 (u32) le32_to_cpu(pgpt_head->sizeof_partition_entry),
1046 /* Allocate memory for PTE, remember to FREE */
1048 pte = memalign(ARCH_DMA_MINALIGN,
1049 PAD_TO_BLOCKSIZE(count, dev_desc));
1052 if (count == 0 || pte == NULL) {
1053 printf("%s: ERROR: Can't allocate %#lX bytes for GPT Entries\n",
1054 __func__, (ulong)count);
1058 /* Read GPT Entries from device */
1059 blk = le64_to_cpu(pgpt_head->partition_entry_lba);
1060 blk_cnt = BLOCK_CNT(count, dev_desc);
1061 if (blk_dread(dev_desc, blk, (lbaint_t)blk_cnt, pte) != blk_cnt) {
1062 printf("*** ERROR: Can't read GPT Entries ***\n");
1070 * is_pte_valid(): validates a single Partition Table Entry
1071 * @gpt_entry - Pointer to a single Partition Table Entry
1073 * Description: returns 1 if valid, 0 on error.
1075 static int is_pte_valid(gpt_entry * pte)
1077 efi_guid_t unused_guid;
1080 printf("%s: Invalid Argument(s)\n", __func__);
1084 /* Only one validation for now:
1085 * The GUID Partition Type != Unused Entry (ALL-ZERO)
1087 memset(unused_guid.b, 0, sizeof(unused_guid.b));
1089 if (memcmp(pte->partition_type_guid.b, unused_guid.b,
1090 sizeof(unused_guid.b)) == 0) {
1092 debug("%s: Found an unused PTE GUID at 0x%08X\n", __func__,
1093 (unsigned int)(uintptr_t)pte);
1102 * Add an 'a_' prefix so it comes before 'dos' in the linker list. We need to
1103 * check EFI first, since a DOS partition is often used as a 'protective MBR'
1106 U_BOOT_PART_TYPE(a_efi) = {
1108 .part_type = PART_TYPE_EFI,
1109 .max_entries = GPT_ENTRY_NUMBERS,
1110 .get_info = part_get_info_ptr(part_get_info_efi),
1111 .print = part_print_ptr(part_print_efi),
1112 .test = part_test_efi,