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;
26 #ifdef CONFIG_HAVE_BLOCK_DEVICE
28 * efi_crc32() - EFI version of crc32 function
29 * @buf: buffer to calculate crc32 of
30 * @len - length of buf
32 * Description: Returns EFI-style CRC32 value for @buf
34 static inline u32 efi_crc32(const void *buf, u32 len)
36 return crc32(0, buf, len);
40 * Private function prototypes
43 static int pmbr_part_valid(struct partition *part);
44 static int is_pmbr_valid(legacy_mbr * mbr);
45 static int is_gpt_valid(struct blk_desc *dev_desc, u64 lba,
46 gpt_header *pgpt_head, gpt_entry **pgpt_pte);
47 static gpt_entry *alloc_read_gpt_entries(struct blk_desc *dev_desc,
48 gpt_header *pgpt_head);
49 static int is_pte_valid(gpt_entry * pte);
51 static char *print_efiname(gpt_entry *pte)
53 static char name[PARTNAME_SZ + 1];
55 for (i = 0; i < PARTNAME_SZ; i++) {
57 c = pte->partition_name[i] & 0xff;
58 c = (c && !isprint(c)) ? '.' : c;
61 name[PARTNAME_SZ] = 0;
65 static efi_guid_t system_guid = PARTITION_SYSTEM_GUID;
67 static inline int is_bootable(gpt_entry *p)
69 return p->attributes.fields.legacy_bios_bootable ||
70 !memcmp(&(p->partition_type_guid), &system_guid,
74 static int validate_gpt_header(gpt_header *gpt_h, lbaint_t lba,
77 uint32_t crc32_backup = 0;
80 /* Check the GPT header signature */
81 if (le64_to_cpu(gpt_h->signature) != GPT_HEADER_SIGNATURE) {
82 printf("%s signature is wrong: 0x%llX != 0x%llX\n",
83 "GUID Partition Table Header",
84 le64_to_cpu(gpt_h->signature),
85 GPT_HEADER_SIGNATURE);
89 /* Check the GUID Partition Table CRC */
90 memcpy(&crc32_backup, &gpt_h->header_crc32, sizeof(crc32_backup));
91 memset(&gpt_h->header_crc32, 0, sizeof(gpt_h->header_crc32));
93 calc_crc32 = efi_crc32((const unsigned char *)gpt_h,
94 le32_to_cpu(gpt_h->header_size));
96 memcpy(&gpt_h->header_crc32, &crc32_backup, sizeof(crc32_backup));
98 if (calc_crc32 != le32_to_cpu(crc32_backup)) {
99 printf("%s CRC is wrong: 0x%x != 0x%x\n",
100 "GUID Partition Table Header",
101 le32_to_cpu(crc32_backup), calc_crc32);
106 * Check that the my_lba entry points to the LBA that contains the GPT
108 if (le64_to_cpu(gpt_h->my_lba) != lba) {
109 printf("GPT: my_lba incorrect: %llX != " LBAF "\n",
110 le64_to_cpu(gpt_h->my_lba),
116 * Check that the first_usable_lba and that the last_usable_lba are
119 if (le64_to_cpu(gpt_h->first_usable_lba) > lastlba) {
120 printf("GPT: first_usable_lba incorrect: %llX > " LBAF "\n",
121 le64_to_cpu(gpt_h->first_usable_lba), lastlba);
124 if (le64_to_cpu(gpt_h->last_usable_lba) > lastlba) {
125 printf("GPT: last_usable_lba incorrect: %llX > " LBAF "\n",
126 le64_to_cpu(gpt_h->last_usable_lba), lastlba);
130 debug("GPT: first_usable_lba: %llX last_usable_lba: %llX last lba: "
131 LBAF "\n", le64_to_cpu(gpt_h->first_usable_lba),
132 le64_to_cpu(gpt_h->last_usable_lba), lastlba);
137 static int validate_gpt_entries(gpt_header *gpt_h, gpt_entry *gpt_e)
141 /* Check the GUID Partition Table Entry Array CRC */
142 calc_crc32 = efi_crc32((const unsigned char *)gpt_e,
143 le32_to_cpu(gpt_h->num_partition_entries) *
144 le32_to_cpu(gpt_h->sizeof_partition_entry));
146 if (calc_crc32 != le32_to_cpu(gpt_h->partition_entry_array_crc32)) {
147 printf("%s: 0x%x != 0x%x\n",
148 "GUID Partition Table Entry Array CRC is wrong",
149 le32_to_cpu(gpt_h->partition_entry_array_crc32),
157 static void prepare_backup_gpt_header(gpt_header *gpt_h)
162 /* recalculate the values for the Backup GPT Header */
163 val = le64_to_cpu(gpt_h->my_lba);
164 gpt_h->my_lba = gpt_h->alternate_lba;
165 gpt_h->alternate_lba = cpu_to_le64(val);
166 gpt_h->partition_entry_lba =
167 cpu_to_le64(le64_to_cpu(gpt_h->last_usable_lba) + 1);
168 gpt_h->header_crc32 = 0;
170 calc_crc32 = efi_crc32((const unsigned char *)gpt_h,
171 le32_to_cpu(gpt_h->header_size));
172 gpt_h->header_crc32 = cpu_to_le32(calc_crc32);
175 #if CONFIG_IS_ENABLED(EFI_PARTITION)
177 * Public Functions (include/part.h)
181 * UUID is displayed as 32 hexadecimal digits, in 5 groups,
182 * separated by hyphens, in the form 8-4-4-4-12 for a total of 36 characters
184 int get_disk_guid(struct blk_desc * dev_desc, char *guid)
186 ALLOC_CACHE_ALIGN_BUFFER_PAD(gpt_header, gpt_head, 1, dev_desc->blksz);
187 gpt_entry *gpt_pte = NULL;
188 unsigned char *guid_bin;
190 /* This function validates AND fills in the GPT header and PTE */
191 if (is_gpt_valid(dev_desc, GPT_PRIMARY_PARTITION_TABLE_LBA,
192 gpt_head, &gpt_pte) != 1) {
193 printf("%s: *** ERROR: Invalid GPT ***\n", __func__);
194 if (is_gpt_valid(dev_desc, dev_desc->lba - 1,
195 gpt_head, &gpt_pte) != 1) {
196 printf("%s: *** ERROR: Invalid Backup GPT ***\n",
200 printf("%s: *** Using Backup GPT ***\n",
205 guid_bin = gpt_head->disk_guid.b;
206 uuid_bin_to_str(guid_bin, guid, UUID_STR_FORMAT_GUID);
211 void part_print_efi(struct blk_desc *dev_desc)
213 ALLOC_CACHE_ALIGN_BUFFER_PAD(gpt_header, gpt_head, 1, dev_desc->blksz);
214 gpt_entry *gpt_pte = NULL;
216 char uuid[UUID_STR_LEN + 1];
217 unsigned char *uuid_bin;
219 /* This function validates AND fills in the GPT header and PTE */
220 if (is_gpt_valid(dev_desc, GPT_PRIMARY_PARTITION_TABLE_LBA,
221 gpt_head, &gpt_pte) != 1) {
222 printf("%s: *** ERROR: Invalid GPT ***\n", __func__);
223 if (is_gpt_valid(dev_desc, (dev_desc->lba - 1),
224 gpt_head, &gpt_pte) != 1) {
225 printf("%s: *** ERROR: Invalid Backup GPT ***\n",
229 printf("%s: *** Using Backup GPT ***\n",
234 debug("%s: gpt-entry at %p\n", __func__, gpt_pte);
236 printf("Part\tStart LBA\tEnd LBA\t\tName\n");
237 printf("\tAttributes\n");
238 printf("\tType GUID\n");
239 printf("\tPartition GUID\n");
241 for (i = 0; i < le32_to_cpu(gpt_head->num_partition_entries); i++) {
242 /* Stop at the first non valid PTE */
243 if (!is_pte_valid(&gpt_pte[i]))
246 printf("%3d\t0x%08llx\t0x%08llx\t\"%s\"\n", (i + 1),
247 le64_to_cpu(gpt_pte[i].starting_lba),
248 le64_to_cpu(gpt_pte[i].ending_lba),
249 print_efiname(&gpt_pte[i]));
250 printf("\tattrs:\t0x%016llx\n", gpt_pte[i].attributes.raw);
251 uuid_bin = (unsigned char *)gpt_pte[i].partition_type_guid.b;
252 uuid_bin_to_str(uuid_bin, uuid, UUID_STR_FORMAT_GUID);
253 printf("\ttype:\t%s\n", uuid);
254 #ifdef CONFIG_PARTITION_TYPE_GUID
255 if (!uuid_guid_get_str(uuid_bin, uuid))
256 printf("\ttype:\t%s\n", uuid);
258 uuid_bin = (unsigned char *)gpt_pte[i].unique_partition_guid.b;
259 uuid_bin_to_str(uuid_bin, uuid, UUID_STR_FORMAT_GUID);
260 printf("\tguid:\t%s\n", uuid);
263 /* Remember to free pte */
268 int part_get_info_efi(struct blk_desc *dev_desc, int part,
269 disk_partition_t *info)
271 ALLOC_CACHE_ALIGN_BUFFER_PAD(gpt_header, gpt_head, 1, dev_desc->blksz);
272 gpt_entry *gpt_pte = NULL;
274 /* "part" argument must be at least 1 */
276 printf("%s: Invalid Argument(s)\n", __func__);
280 /* This function validates AND fills in the GPT header and PTE */
281 if (is_gpt_valid(dev_desc, GPT_PRIMARY_PARTITION_TABLE_LBA,
282 gpt_head, &gpt_pte) != 1) {
283 printf("%s: *** ERROR: Invalid GPT ***\n", __func__);
284 if (is_gpt_valid(dev_desc, (dev_desc->lba - 1),
285 gpt_head, &gpt_pte) != 1) {
286 printf("%s: *** ERROR: Invalid Backup GPT ***\n",
290 printf("%s: *** Using Backup GPT ***\n",
295 if (part > le32_to_cpu(gpt_head->num_partition_entries) ||
296 !is_pte_valid(&gpt_pte[part - 1])) {
297 debug("%s: *** ERROR: Invalid partition number %d ***\n",
303 /* The 'lbaint_t' casting may limit the maximum disk size to 2 TB */
304 info->start = (lbaint_t)le64_to_cpu(gpt_pte[part - 1].starting_lba);
305 /* The ending LBA is inclusive, to calculate size, add 1 to it */
306 info->size = (lbaint_t)le64_to_cpu(gpt_pte[part - 1].ending_lba) + 1
308 info->blksz = dev_desc->blksz;
310 sprintf((char *)info->name, "%s",
311 print_efiname(&gpt_pte[part - 1]));
312 strcpy((char *)info->type, "U-Boot");
313 info->bootable = is_bootable(&gpt_pte[part - 1]);
314 #if CONFIG_IS_ENABLED(PARTITION_UUIDS)
315 uuid_bin_to_str(gpt_pte[part - 1].unique_partition_guid.b, info->uuid,
316 UUID_STR_FORMAT_GUID);
318 #ifdef CONFIG_PARTITION_TYPE_GUID
319 uuid_bin_to_str(gpt_pte[part - 1].partition_type_guid.b,
320 info->type_guid, UUID_STR_FORMAT_GUID);
323 debug("%s: start 0x" LBAF ", size 0x" LBAF ", name %s\n", __func__,
324 info->start, info->size, info->name);
326 /* Remember to free pte */
331 static int part_test_efi(struct blk_desc *dev_desc)
333 ALLOC_CACHE_ALIGN_BUFFER_PAD(legacy_mbr, legacymbr, 1, dev_desc->blksz);
335 /* Read legacy MBR from block 0 and validate it */
336 if ((blk_dread(dev_desc, 0, 1, (ulong *)legacymbr) != 1)
337 || (is_pmbr_valid(legacymbr) != 1)) {
344 * set_protective_mbr(): Set the EFI protective MBR
345 * @param dev_desc - block device descriptor
347 * @return - zero on success, otherwise error
349 static int set_protective_mbr(struct blk_desc *dev_desc)
351 /* Setup the Protective MBR */
352 ALLOC_CACHE_ALIGN_BUFFER_PAD(legacy_mbr, p_mbr, 1, dev_desc->blksz);
354 printf("%s: calloc failed!\n", __func__);
358 /* Read MBR to backup boot code if it exists */
359 if (blk_dread(dev_desc, 0, 1, p_mbr) != 1) {
360 pr_err("** Can't read from device %d **\n", dev_desc->devnum);
364 /* Clear all data in MBR except of backed up boot code */
365 memset((char *)p_mbr + MSDOS_MBR_BOOT_CODE_SIZE, 0, sizeof(*p_mbr) -
366 MSDOS_MBR_BOOT_CODE_SIZE);
368 /* Append signature */
369 p_mbr->signature = MSDOS_MBR_SIGNATURE;
370 p_mbr->partition_record[0].sys_ind = EFI_PMBR_OSTYPE_EFI_GPT;
371 p_mbr->partition_record[0].start_sect = 1;
372 p_mbr->partition_record[0].nr_sects = (u32) dev_desc->lba - 1;
374 /* Write MBR sector to the MMC device */
375 if (blk_dwrite(dev_desc, 0, 1, p_mbr) != 1) {
376 printf("** Can't write to device %d **\n",
384 int write_gpt_table(struct blk_desc *dev_desc,
385 gpt_header *gpt_h, gpt_entry *gpt_e)
387 const int pte_blk_cnt = BLOCK_CNT((gpt_h->num_partition_entries
388 * sizeof(gpt_entry)), dev_desc);
391 debug("max lba: %x\n", (u32) dev_desc->lba);
392 /* Setup the Protective MBR */
393 if (set_protective_mbr(dev_desc) < 0)
396 /* Generate CRC for the Primary GPT Header */
397 calc_crc32 = efi_crc32((const unsigned char *)gpt_e,
398 le32_to_cpu(gpt_h->num_partition_entries) *
399 le32_to_cpu(gpt_h->sizeof_partition_entry));
400 gpt_h->partition_entry_array_crc32 = cpu_to_le32(calc_crc32);
402 calc_crc32 = efi_crc32((const unsigned char *)gpt_h,
403 le32_to_cpu(gpt_h->header_size));
404 gpt_h->header_crc32 = cpu_to_le32(calc_crc32);
406 /* Write the First GPT to the block right after the Legacy MBR */
407 if (blk_dwrite(dev_desc, 1, 1, gpt_h) != 1)
410 if (blk_dwrite(dev_desc, le64_to_cpu(gpt_h->partition_entry_lba),
411 pte_blk_cnt, gpt_e) != pte_blk_cnt)
414 prepare_backup_gpt_header(gpt_h);
416 if (blk_dwrite(dev_desc, (lbaint_t)le64_to_cpu(gpt_h->last_usable_lba)
417 + 1, pte_blk_cnt, gpt_e) != pte_blk_cnt)
420 if (blk_dwrite(dev_desc, (lbaint_t)le64_to_cpu(gpt_h->my_lba), 1,
424 debug("GPT successfully written to block device!\n");
428 printf("** Can't write to device %d **\n", dev_desc->devnum);
432 int gpt_fill_pte(struct blk_desc *dev_desc,
433 gpt_header *gpt_h, gpt_entry *gpt_e,
434 disk_partition_t *partitions, int parts)
436 lbaint_t offset = (lbaint_t)le64_to_cpu(gpt_h->first_usable_lba);
437 lbaint_t last_usable_lba = (lbaint_t)
438 le64_to_cpu(gpt_h->last_usable_lba);
440 size_t efiname_len, dosname_len;
441 #if CONFIG_IS_ENABLED(PARTITION_UUIDS)
443 unsigned char *bin_uuid;
445 #ifdef CONFIG_PARTITION_TYPE_GUID
447 unsigned char *bin_type_guid;
449 size_t hdr_start = gpt_h->my_lba;
450 size_t hdr_end = hdr_start + 1;
452 size_t pte_start = gpt_h->partition_entry_lba;
453 size_t pte_end = pte_start +
454 gpt_h->num_partition_entries * gpt_h->sizeof_partition_entry /
457 for (i = 0; i < parts; i++) {
458 /* partition starting lba */
459 lbaint_t start = partitions[i].start;
460 lbaint_t size = partitions[i].size;
463 offset = start + size;
470 * If our partition overlaps with either the GPT
471 * header, or the partition entry, reject it.
473 if (((start < hdr_end && hdr_start < (start + size)) ||
474 (start < pte_end && pte_start < (start + size)))) {
475 printf("Partition overlap\n");
479 gpt_e[i].starting_lba = cpu_to_le64(start);
481 if (offset > (last_usable_lba + 1)) {
482 printf("Partitions layout exceds disk size\n");
485 /* partition ending lba */
486 if ((i == parts - 1) && (size == 0))
487 /* extend the last partition to maximuim */
488 gpt_e[i].ending_lba = gpt_h->last_usable_lba;
490 gpt_e[i].ending_lba = cpu_to_le64(offset - 1);
492 #ifdef CONFIG_PARTITION_TYPE_GUID
493 str_type_guid = partitions[i].type_guid;
494 bin_type_guid = gpt_e[i].partition_type_guid.b;
495 if (strlen(str_type_guid)) {
496 if (uuid_str_to_bin(str_type_guid, bin_type_guid,
497 UUID_STR_FORMAT_GUID)) {
498 printf("Partition no. %d: invalid type guid: %s\n",
503 /* default partition type GUID */
504 memcpy(bin_type_guid,
505 &PARTITION_BASIC_DATA_GUID, 16);
508 /* partition type GUID */
509 memcpy(gpt_e[i].partition_type_guid.b,
510 &PARTITION_BASIC_DATA_GUID, 16);
513 #if CONFIG_IS_ENABLED(PARTITION_UUIDS)
514 str_uuid = partitions[i].uuid;
515 bin_uuid = gpt_e[i].unique_partition_guid.b;
517 if (uuid_str_to_bin(str_uuid, bin_uuid, UUID_STR_FORMAT_GUID)) {
518 printf("Partition no. %d: invalid guid: %s\n",
524 /* partition attributes */
525 memset(&gpt_e[i].attributes, 0,
526 sizeof(gpt_entry_attributes));
528 if (partitions[i].bootable)
529 gpt_e[i].attributes.fields.legacy_bios_bootable = 1;
532 efiname_len = sizeof(gpt_e[i].partition_name)
533 / sizeof(efi_char16_t);
534 dosname_len = sizeof(partitions[i].name);
536 memset(gpt_e[i].partition_name, 0,
537 sizeof(gpt_e[i].partition_name));
539 for (k = 0; k < min(dosname_len, efiname_len); k++)
540 gpt_e[i].partition_name[k] =
541 (efi_char16_t)(partitions[i].name[k]);
543 debug("%s: name: %s offset[%d]: 0x" LBAF
544 " size[%d]: 0x" LBAF "\n",
545 __func__, partitions[i].name, i,
552 static uint32_t partition_entries_offset(struct blk_desc *dev_desc)
554 uint32_t offset_blks = 2;
555 uint32_t __maybe_unused offset_bytes;
556 int __maybe_unused config_offset;
558 #if defined(CONFIG_EFI_PARTITION_ENTRIES_OFF)
560 * Some architectures require their SPL loader at a fixed
561 * address within the first 16KB of the disk. To avoid an
562 * overlap with the partition entries of the EFI partition
563 * table, the first safe offset (in bytes, from the start of
564 * the disk) for the entries can be set in
565 * CONFIG_EFI_PARTITION_ENTRIES_OFF.
568 PAD_TO_BLOCKSIZE(CONFIG_EFI_PARTITION_ENTRIES_OFF, dev_desc);
569 offset_blks = offset_bytes / dev_desc->blksz;
572 #if defined(CONFIG_OF_CONTROL)
574 * Allow the offset of the first partition entires (in bytes
575 * from the start of the device) to be specified as a property
576 * of the device tree '/config' node.
578 config_offset = fdtdec_get_config_int(gd->fdt_blob,
579 "u-boot,efi-partition-entries-offset",
581 if (config_offset != -EINVAL) {
582 offset_bytes = PAD_TO_BLOCKSIZE(config_offset, dev_desc);
583 offset_blks = offset_bytes / dev_desc->blksz;
587 debug("efi: partition entries offset (in blocks): %d\n", offset_blks);
590 * The earliest LBA this can be at is LBA#2 (i.e. right behind
591 * the (protective) MBR and the GPT header.
599 int gpt_fill_header(struct blk_desc *dev_desc, gpt_header *gpt_h,
600 char *str_guid, int parts_count)
602 gpt_h->signature = cpu_to_le64(GPT_HEADER_SIGNATURE);
603 gpt_h->revision = cpu_to_le32(GPT_HEADER_REVISION_V1);
604 gpt_h->header_size = cpu_to_le32(sizeof(gpt_header));
605 gpt_h->my_lba = cpu_to_le64(1);
606 gpt_h->alternate_lba = cpu_to_le64(dev_desc->lba - 1);
607 gpt_h->last_usable_lba = cpu_to_le64(dev_desc->lba - 34);
608 gpt_h->partition_entry_lba =
609 cpu_to_le64(partition_entries_offset(dev_desc));
610 gpt_h->first_usable_lba =
611 cpu_to_le64(le64_to_cpu(gpt_h->partition_entry_lba) + 32);
612 gpt_h->num_partition_entries = cpu_to_le32(GPT_ENTRY_NUMBERS);
613 gpt_h->sizeof_partition_entry = cpu_to_le32(sizeof(gpt_entry));
614 gpt_h->header_crc32 = 0;
615 gpt_h->partition_entry_array_crc32 = 0;
617 if (uuid_str_to_bin(str_guid, gpt_h->disk_guid.b, UUID_STR_FORMAT_GUID))
623 int gpt_restore(struct blk_desc *dev_desc, char *str_disk_guid,
624 disk_partition_t *partitions, int parts_count)
630 size = PAD_TO_BLOCKSIZE(sizeof(gpt_header), dev_desc);
631 gpt_h = malloc_cache_aligned(size);
633 printf("%s: calloc failed!\n", __func__);
636 memset(gpt_h, 0, size);
638 size = PAD_TO_BLOCKSIZE(GPT_ENTRY_NUMBERS * sizeof(gpt_entry),
640 gpt_e = malloc_cache_aligned(size);
642 printf("%s: calloc failed!\n", __func__);
646 memset(gpt_e, 0, size);
648 /* Generate Primary GPT header (LBA1) */
649 ret = gpt_fill_header(dev_desc, gpt_h, str_disk_guid, parts_count);
653 /* Generate partition entries */
654 ret = gpt_fill_pte(dev_desc, gpt_h, gpt_e, partitions, parts_count);
658 /* Write GPT partition table */
659 ret = write_gpt_table(dev_desc, gpt_h, gpt_e);
667 static void gpt_convert_efi_name_to_char(char *s, efi_char16_t *es, int n)
669 char *ess = (char *)es;
674 for (i = 0, j = 0; j < n; i += 2, j++) {
681 int gpt_verify_headers(struct blk_desc *dev_desc, gpt_header *gpt_head,
685 * This function validates AND
686 * fills in the GPT header and PTE
688 if (is_gpt_valid(dev_desc,
689 GPT_PRIMARY_PARTITION_TABLE_LBA,
690 gpt_head, gpt_pte) != 1) {
691 printf("%s: *** ERROR: Invalid GPT ***\n",
695 if (is_gpt_valid(dev_desc, (dev_desc->lba - 1),
696 gpt_head, gpt_pte) != 1) {
697 printf("%s: *** ERROR: Invalid Backup GPT ***\n",
705 int gpt_verify_partitions(struct blk_desc *dev_desc,
706 disk_partition_t *partitions, int parts,
707 gpt_header *gpt_head, gpt_entry **gpt_pte)
709 char efi_str[PARTNAME_SZ + 1];
714 ret = gpt_verify_headers(dev_desc, gpt_head, gpt_pte);
720 for (i = 0; i < parts; i++) {
721 if (i == gpt_head->num_partition_entries) {
722 pr_err("More partitions than allowed!\n");
726 /* Check if GPT and ENV partition names match */
727 gpt_convert_efi_name_to_char(efi_str, gpt_e[i].partition_name,
730 debug("%s: part: %2d name - GPT: %16s, ENV: %16s ",
731 __func__, i, efi_str, partitions[i].name);
733 if (strncmp(efi_str, (char *)partitions[i].name,
734 sizeof(partitions->name))) {
735 pr_err("Partition name: %s does not match %s!\n",
736 efi_str, (char *)partitions[i].name);
740 /* Check if GPT and ENV sizes match */
741 gpt_part_size = le64_to_cpu(gpt_e[i].ending_lba) -
742 le64_to_cpu(gpt_e[i].starting_lba) + 1;
743 debug("size(LBA) - GPT: %8llu, ENV: %8llu ",
744 (unsigned long long)gpt_part_size,
745 (unsigned long long)partitions[i].size);
747 if (le64_to_cpu(gpt_part_size) != partitions[i].size) {
748 /* We do not check the extend partition size */
749 if ((i == parts - 1) && (partitions[i].size == 0))
752 pr_err("Partition %s size: %llu does not match %llu!\n",
753 efi_str, (unsigned long long)gpt_part_size,
754 (unsigned long long)partitions[i].size);
759 * Start address is optional - check only if provided
760 * in '$partition' variable
762 if (!partitions[i].start) {
767 /* Check if GPT and ENV start LBAs match */
768 debug("start LBA - GPT: %8llu, ENV: %8llu\n",
769 le64_to_cpu(gpt_e[i].starting_lba),
770 (unsigned long long)partitions[i].start);
772 if (le64_to_cpu(gpt_e[i].starting_lba) != partitions[i].start) {
773 pr_err("Partition %s start: %llu does not match %llu!\n",
774 efi_str, le64_to_cpu(gpt_e[i].starting_lba),
775 (unsigned long long)partitions[i].start);
783 int is_valid_gpt_buf(struct blk_desc *dev_desc, void *buf)
788 /* determine start of GPT Header in the buffer */
789 gpt_h = buf + (GPT_PRIMARY_PARTITION_TABLE_LBA *
791 if (validate_gpt_header(gpt_h, GPT_PRIMARY_PARTITION_TABLE_LBA,
795 /* determine start of GPT Entries in the buffer */
796 gpt_e = buf + (le64_to_cpu(gpt_h->partition_entry_lba) *
798 if (validate_gpt_entries(gpt_h, gpt_e))
804 int write_mbr_and_gpt_partitions(struct blk_desc *dev_desc, void *buf)
812 if (is_valid_gpt_buf(dev_desc, buf))
815 /* determine start of GPT Header in the buffer */
816 gpt_h = buf + (GPT_PRIMARY_PARTITION_TABLE_LBA *
819 /* determine start of GPT Entries in the buffer */
820 gpt_e = buf + (le64_to_cpu(gpt_h->partition_entry_lba) *
822 gpt_e_blk_cnt = BLOCK_CNT((le32_to_cpu(gpt_h->num_partition_entries) *
823 le32_to_cpu(gpt_h->sizeof_partition_entry)),
827 lba = 0; /* MBR is always at 0 */
828 cnt = 1; /* MBR (1 block) */
829 if (blk_dwrite(dev_desc, lba, cnt, buf) != cnt) {
830 printf("%s: failed writing '%s' (%d blks at 0x" LBAF ")\n",
831 __func__, "MBR", cnt, lba);
835 /* write Primary GPT */
836 lba = GPT_PRIMARY_PARTITION_TABLE_LBA;
837 cnt = 1; /* GPT Header (1 block) */
838 if (blk_dwrite(dev_desc, lba, cnt, gpt_h) != cnt) {
839 printf("%s: failed writing '%s' (%d blks at 0x" LBAF ")\n",
840 __func__, "Primary GPT Header", cnt, lba);
844 lba = le64_to_cpu(gpt_h->partition_entry_lba);
846 if (blk_dwrite(dev_desc, lba, cnt, gpt_e) != cnt) {
847 printf("%s: failed writing '%s' (%d blks at 0x" LBAF ")\n",
848 __func__, "Primary GPT Entries", cnt, lba);
852 prepare_backup_gpt_header(gpt_h);
854 /* write Backup GPT */
855 lba = le64_to_cpu(gpt_h->partition_entry_lba);
857 if (blk_dwrite(dev_desc, lba, cnt, gpt_e) != cnt) {
858 printf("%s: failed writing '%s' (%d blks at 0x" LBAF ")\n",
859 __func__, "Backup GPT Entries", cnt, lba);
863 lba = le64_to_cpu(gpt_h->my_lba);
864 cnt = 1; /* GPT Header (1 block) */
865 if (blk_dwrite(dev_desc, lba, cnt, gpt_h) != cnt) {
866 printf("%s: failed writing '%s' (%d blks at 0x" LBAF ")\n",
867 __func__, "Backup GPT Header", cnt, lba);
879 * pmbr_part_valid(): Check for EFI partition signature
881 * Returns: 1 if EFI GPT partition type is found.
883 static int pmbr_part_valid(struct partition *part)
885 if (part->sys_ind == EFI_PMBR_OSTYPE_EFI_GPT &&
886 get_unaligned_le32(&part->start_sect) == 1UL) {
894 * is_pmbr_valid(): test Protective MBR for validity
896 * Returns: 1 if PMBR is valid, 0 otherwise.
897 * Validity depends on two things:
898 * 1) MSDOS signature is in the last two bytes of the MBR
899 * 2) One partition of type 0xEE is found, checked by pmbr_part_valid()
901 static int is_pmbr_valid(legacy_mbr * mbr)
905 if (!mbr || le16_to_cpu(mbr->signature) != MSDOS_MBR_SIGNATURE)
908 for (i = 0; i < 4; i++) {
909 if (pmbr_part_valid(&mbr->partition_record[i])) {
917 * is_gpt_valid() - tests one GPT header and PTEs for validity
919 * lba is the logical block address of the GPT header to test
920 * gpt is a GPT header ptr, filled on return.
921 * ptes is a PTEs ptr, filled on return.
923 * Description: returns 1 if valid, 0 on error.
924 * If valid, returns pointers to PTEs.
926 static int is_gpt_valid(struct blk_desc *dev_desc, u64 lba,
927 gpt_header *pgpt_head, gpt_entry **pgpt_pte)
929 /* Confirm valid arguments prior to allocation. */
930 if (!dev_desc || !pgpt_head) {
931 printf("%s: Invalid Argument(s)\n", __func__);
935 ALLOC_CACHE_ALIGN_BUFFER_PAD(legacy_mbr, mbr, 1, dev_desc->blksz);
937 /* Read MBR Header from device */
938 if (blk_dread(dev_desc, 0, 1, (ulong *)mbr) != 1) {
939 printf("*** ERROR: Can't read MBR header ***\n");
943 /* Read GPT Header from device */
944 if (blk_dread(dev_desc, (lbaint_t)lba, 1, pgpt_head) != 1) {
945 printf("*** ERROR: Can't read GPT header ***\n");
949 if (validate_gpt_header(pgpt_head, (lbaint_t)lba, dev_desc->lba))
952 if (dev_desc->sig_type == SIG_TYPE_NONE) {
953 efi_guid_t empty = {};
954 if (memcmp(&pgpt_head->disk_guid, &empty, sizeof(empty))) {
955 dev_desc->sig_type = SIG_TYPE_GUID;
956 memcpy(&dev_desc->guid_sig, &pgpt_head->disk_guid,
958 } else if (mbr->unique_mbr_signature != 0) {
959 dev_desc->sig_type = SIG_TYPE_MBR;
960 dev_desc->mbr_sig = mbr->unique_mbr_signature;
964 /* Read and allocate Partition Table Entries */
965 *pgpt_pte = alloc_read_gpt_entries(dev_desc, pgpt_head);
966 if (*pgpt_pte == NULL) {
967 printf("GPT: Failed to allocate memory for PTE\n");
971 if (validate_gpt_entries(pgpt_head, *pgpt_pte)) {
976 /* We're done, all's well */
981 * alloc_read_gpt_entries(): reads partition entries from disk
985 * Description: Returns ptes on success, NULL on error.
986 * Allocates space for PTEs based on information found in @gpt.
987 * Notes: remember to free pte when you're done!
989 static gpt_entry *alloc_read_gpt_entries(struct blk_desc *dev_desc,
990 gpt_header *pgpt_head)
992 size_t count = 0, blk_cnt;
994 gpt_entry *pte = NULL;
996 if (!dev_desc || !pgpt_head) {
997 printf("%s: Invalid Argument(s)\n", __func__);
1001 count = le32_to_cpu(pgpt_head->num_partition_entries) *
1002 le32_to_cpu(pgpt_head->sizeof_partition_entry);
1004 debug("%s: count = %u * %u = %lu\n", __func__,
1005 (u32) le32_to_cpu(pgpt_head->num_partition_entries),
1006 (u32) le32_to_cpu(pgpt_head->sizeof_partition_entry),
1009 /* Allocate memory for PTE, remember to FREE */
1011 pte = memalign(ARCH_DMA_MINALIGN,
1012 PAD_TO_BLOCKSIZE(count, dev_desc));
1015 if (count == 0 || pte == NULL) {
1016 printf("%s: ERROR: Can't allocate %#lX bytes for GPT Entries\n",
1017 __func__, (ulong)count);
1021 /* Read GPT Entries from device */
1022 blk = le64_to_cpu(pgpt_head->partition_entry_lba);
1023 blk_cnt = BLOCK_CNT(count, dev_desc);
1024 if (blk_dread(dev_desc, blk, (lbaint_t)blk_cnt, pte) != blk_cnt) {
1025 printf("*** ERROR: Can't read GPT Entries ***\n");
1033 * is_pte_valid(): validates a single Partition Table Entry
1034 * @gpt_entry - Pointer to a single Partition Table Entry
1036 * Description: returns 1 if valid, 0 on error.
1038 static int is_pte_valid(gpt_entry * pte)
1040 efi_guid_t unused_guid;
1043 printf("%s: Invalid Argument(s)\n", __func__);
1047 /* Only one validation for now:
1048 * The GUID Partition Type != Unused Entry (ALL-ZERO)
1050 memset(unused_guid.b, 0, sizeof(unused_guid.b));
1052 if (memcmp(pte->partition_type_guid.b, unused_guid.b,
1053 sizeof(unused_guid.b)) == 0) {
1055 debug("%s: Found an unused PTE GUID at 0x%08X\n", __func__,
1056 (unsigned int)(uintptr_t)pte);
1065 * Add an 'a_' prefix so it comes before 'dos' in the linker list. We need to
1066 * check EFI first, since a DOS partition is often used as a 'protective MBR'
1069 U_BOOT_PART_TYPE(a_efi) = {
1071 .part_type = PART_TYPE_EFI,
1072 .max_entries = GPT_ENTRY_NUMBERS,
1073 .get_info = part_get_info_ptr(part_get_info_efi),
1074 .print = part_print_ptr(part_print_efi),
1075 .test = part_test_efi,