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>
20 #include <linux/compiler.h>
21 #include <linux/ctype.h>
23 DECLARE_GLOBAL_DATA_PTR;
26 * GUID for basic data partions.
28 static const efi_guid_t partition_basic_data_guid = PARTITION_BASIC_DATA_GUID;
30 #ifdef CONFIG_HAVE_BLOCK_DEVICE
32 * efi_crc32() - EFI version of crc32 function
33 * @buf: buffer to calculate crc32 of
34 * @len - length of buf
36 * Description: Returns EFI-style CRC32 value for @buf
38 static inline u32 efi_crc32(const void *buf, u32 len)
40 return crc32(0, buf, len);
44 * Private function prototypes
47 static int pmbr_part_valid(struct partition *part);
48 static int is_pmbr_valid(legacy_mbr * mbr);
49 static int is_gpt_valid(struct blk_desc *dev_desc, u64 lba,
50 gpt_header *pgpt_head, gpt_entry **pgpt_pte);
51 static gpt_entry *alloc_read_gpt_entries(struct blk_desc *dev_desc,
52 gpt_header *pgpt_head);
53 static int is_pte_valid(gpt_entry * pte);
55 static char *print_efiname(gpt_entry *pte)
57 static char name[PARTNAME_SZ + 1];
59 for (i = 0; i < PARTNAME_SZ; i++) {
61 c = pte->partition_name[i] & 0xff;
62 c = (c && !isprint(c)) ? '.' : c;
65 name[PARTNAME_SZ] = 0;
69 static efi_guid_t system_guid = PARTITION_SYSTEM_GUID;
71 static inline int is_bootable(gpt_entry *p)
73 return p->attributes.fields.legacy_bios_bootable ||
74 !memcmp(&(p->partition_type_guid), &system_guid,
78 static int validate_gpt_header(gpt_header *gpt_h, lbaint_t lba,
81 uint32_t crc32_backup = 0;
84 /* Check the GPT header signature */
85 if (le64_to_cpu(gpt_h->signature) != GPT_HEADER_SIGNATURE_UBOOT) {
86 printf("%s signature is wrong: 0x%llX != 0x%llX\n",
87 "GUID Partition Table Header",
88 le64_to_cpu(gpt_h->signature),
89 GPT_HEADER_SIGNATURE_UBOOT);
93 /* Check the GUID Partition Table CRC */
94 memcpy(&crc32_backup, &gpt_h->header_crc32, sizeof(crc32_backup));
95 memset(&gpt_h->header_crc32, 0, sizeof(gpt_h->header_crc32));
97 calc_crc32 = efi_crc32((const unsigned char *)gpt_h,
98 le32_to_cpu(gpt_h->header_size));
100 memcpy(&gpt_h->header_crc32, &crc32_backup, sizeof(crc32_backup));
102 if (calc_crc32 != le32_to_cpu(crc32_backup)) {
103 printf("%s CRC is wrong: 0x%x != 0x%x\n",
104 "GUID Partition Table Header",
105 le32_to_cpu(crc32_backup), calc_crc32);
110 * Check that the my_lba entry points to the LBA that contains the GPT
112 if (le64_to_cpu(gpt_h->my_lba) != lba) {
113 printf("GPT: my_lba incorrect: %llX != " LBAF "\n",
114 le64_to_cpu(gpt_h->my_lba),
120 * Check that the first_usable_lba and that the last_usable_lba are
123 if (le64_to_cpu(gpt_h->first_usable_lba) > lastlba) {
124 printf("GPT: first_usable_lba incorrect: %llX > " LBAF "\n",
125 le64_to_cpu(gpt_h->first_usable_lba), lastlba);
128 if (le64_to_cpu(gpt_h->last_usable_lba) > lastlba) {
129 printf("GPT: last_usable_lba incorrect: %llX > " LBAF "\n",
130 le64_to_cpu(gpt_h->last_usable_lba), lastlba);
134 debug("GPT: first_usable_lba: %llX last_usable_lba: %llX last lba: "
135 LBAF "\n", le64_to_cpu(gpt_h->first_usable_lba),
136 le64_to_cpu(gpt_h->last_usable_lba), lastlba);
141 static int validate_gpt_entries(gpt_header *gpt_h, gpt_entry *gpt_e)
145 /* Check the GUID Partition Table Entry Array CRC */
146 calc_crc32 = efi_crc32((const unsigned char *)gpt_e,
147 le32_to_cpu(gpt_h->num_partition_entries) *
148 le32_to_cpu(gpt_h->sizeof_partition_entry));
150 if (calc_crc32 != le32_to_cpu(gpt_h->partition_entry_array_crc32)) {
151 printf("%s: 0x%x != 0x%x\n",
152 "GUID Partition Table Entry Array CRC is wrong",
153 le32_to_cpu(gpt_h->partition_entry_array_crc32),
161 static void prepare_backup_gpt_header(gpt_header *gpt_h)
166 /* recalculate the values for the Backup GPT Header */
167 val = le64_to_cpu(gpt_h->my_lba);
168 gpt_h->my_lba = gpt_h->alternate_lba;
169 gpt_h->alternate_lba = cpu_to_le64(val);
170 gpt_h->partition_entry_lba =
171 cpu_to_le64(le64_to_cpu(gpt_h->last_usable_lba) + 1);
172 gpt_h->header_crc32 = 0;
174 calc_crc32 = efi_crc32((const unsigned char *)gpt_h,
175 le32_to_cpu(gpt_h->header_size));
176 gpt_h->header_crc32 = cpu_to_le32(calc_crc32);
179 #if CONFIG_IS_ENABLED(EFI_PARTITION)
181 * Public Functions (include/part.h)
185 * UUID is displayed as 32 hexadecimal digits, in 5 groups,
186 * separated by hyphens, in the form 8-4-4-4-12 for a total of 36 characters
188 int get_disk_guid(struct blk_desc * dev_desc, char *guid)
190 ALLOC_CACHE_ALIGN_BUFFER_PAD(gpt_header, gpt_head, 1, dev_desc->blksz);
191 gpt_entry *gpt_pte = NULL;
192 unsigned char *guid_bin;
194 /* This function validates AND fills in the GPT header and PTE */
195 if (is_gpt_valid(dev_desc, GPT_PRIMARY_PARTITION_TABLE_LBA,
196 gpt_head, &gpt_pte) != 1) {
197 printf("%s: *** ERROR: Invalid GPT ***\n", __func__);
198 if (is_gpt_valid(dev_desc, dev_desc->lba - 1,
199 gpt_head, &gpt_pte) != 1) {
200 printf("%s: *** ERROR: Invalid Backup GPT ***\n",
204 printf("%s: *** Using Backup GPT ***\n",
209 guid_bin = gpt_head->disk_guid.b;
210 uuid_bin_to_str(guid_bin, guid, UUID_STR_FORMAT_GUID);
215 void part_print_efi(struct blk_desc *dev_desc)
217 ALLOC_CACHE_ALIGN_BUFFER_PAD(gpt_header, gpt_head, 1, dev_desc->blksz);
218 gpt_entry *gpt_pte = NULL;
220 char uuid[UUID_STR_LEN + 1];
221 unsigned char *uuid_bin;
223 /* This function validates AND fills in the GPT header and PTE */
224 if (is_gpt_valid(dev_desc, GPT_PRIMARY_PARTITION_TABLE_LBA,
225 gpt_head, &gpt_pte) != 1) {
226 printf("%s: *** ERROR: Invalid GPT ***\n", __func__);
227 if (is_gpt_valid(dev_desc, (dev_desc->lba - 1),
228 gpt_head, &gpt_pte) != 1) {
229 printf("%s: *** ERROR: Invalid Backup GPT ***\n",
233 printf("%s: *** Using Backup GPT ***\n",
238 debug("%s: gpt-entry at %p\n", __func__, gpt_pte);
240 printf("Part\tStart LBA\tEnd LBA\t\tName\n");
241 printf("\tAttributes\n");
242 printf("\tType GUID\n");
243 printf("\tPartition GUID\n");
245 for (i = 0; i < le32_to_cpu(gpt_head->num_partition_entries); i++) {
246 /* Stop at the first non valid PTE */
247 if (!is_pte_valid(&gpt_pte[i]))
250 printf("%3d\t0x%08llx\t0x%08llx\t\"%s\"\n", (i + 1),
251 le64_to_cpu(gpt_pte[i].starting_lba),
252 le64_to_cpu(gpt_pte[i].ending_lba),
253 print_efiname(&gpt_pte[i]));
254 printf("\tattrs:\t0x%016llx\n", gpt_pte[i].attributes.raw);
255 uuid_bin = (unsigned char *)gpt_pte[i].partition_type_guid.b;
256 uuid_bin_to_str(uuid_bin, uuid, UUID_STR_FORMAT_GUID);
257 printf("\ttype:\t%s\n", uuid);
258 #ifdef CONFIG_PARTITION_TYPE_GUID
259 if (!uuid_guid_get_str(uuid_bin, uuid))
260 printf("\ttype:\t%s\n", uuid);
262 uuid_bin = (unsigned char *)gpt_pte[i].unique_partition_guid.b;
263 uuid_bin_to_str(uuid_bin, uuid, UUID_STR_FORMAT_GUID);
264 printf("\tguid:\t%s\n", uuid);
267 /* Remember to free pte */
272 int part_get_info_efi(struct blk_desc *dev_desc, int part,
273 disk_partition_t *info)
275 ALLOC_CACHE_ALIGN_BUFFER_PAD(gpt_header, gpt_head, 1, dev_desc->blksz);
276 gpt_entry *gpt_pte = NULL;
278 /* "part" argument must be at least 1 */
280 printf("%s: Invalid Argument(s)\n", __func__);
284 /* This function validates AND fills in the GPT header and PTE */
285 if (is_gpt_valid(dev_desc, GPT_PRIMARY_PARTITION_TABLE_LBA,
286 gpt_head, &gpt_pte) != 1) {
287 printf("%s: *** ERROR: Invalid GPT ***\n", __func__);
288 if (is_gpt_valid(dev_desc, (dev_desc->lba - 1),
289 gpt_head, &gpt_pte) != 1) {
290 printf("%s: *** ERROR: Invalid Backup GPT ***\n",
294 printf("%s: *** Using Backup GPT ***\n",
299 if (part > le32_to_cpu(gpt_head->num_partition_entries) ||
300 !is_pte_valid(&gpt_pte[part - 1])) {
301 debug("%s: *** ERROR: Invalid partition number %d ***\n",
307 /* The 'lbaint_t' casting may limit the maximum disk size to 2 TB */
308 info->start = (lbaint_t)le64_to_cpu(gpt_pte[part - 1].starting_lba);
309 /* The ending LBA is inclusive, to calculate size, add 1 to it */
310 info->size = (lbaint_t)le64_to_cpu(gpt_pte[part - 1].ending_lba) + 1
312 info->blksz = dev_desc->blksz;
314 sprintf((char *)info->name, "%s",
315 print_efiname(&gpt_pte[part - 1]));
316 strcpy((char *)info->type, "U-Boot");
317 info->bootable = is_bootable(&gpt_pte[part - 1]);
318 #if CONFIG_IS_ENABLED(PARTITION_UUIDS)
319 uuid_bin_to_str(gpt_pte[part - 1].unique_partition_guid.b, info->uuid,
320 UUID_STR_FORMAT_GUID);
322 #ifdef CONFIG_PARTITION_TYPE_GUID
323 uuid_bin_to_str(gpt_pte[part - 1].partition_type_guid.b,
324 info->type_guid, UUID_STR_FORMAT_GUID);
327 debug("%s: start 0x" LBAF ", size 0x" LBAF ", name %s\n", __func__,
328 info->start, info->size, info->name);
330 /* Remember to free pte */
335 static int part_test_efi(struct blk_desc *dev_desc)
337 ALLOC_CACHE_ALIGN_BUFFER_PAD(legacy_mbr, legacymbr, 1, dev_desc->blksz);
339 /* Read legacy MBR from block 0 and validate it */
340 if ((blk_dread(dev_desc, 0, 1, (ulong *)legacymbr) != 1)
341 || (is_pmbr_valid(legacymbr) != 1)) {
348 * set_protective_mbr(): Set the EFI protective MBR
349 * @param dev_desc - block device descriptor
351 * @return - zero on success, otherwise error
353 static int set_protective_mbr(struct blk_desc *dev_desc)
355 /* Setup the Protective MBR */
356 ALLOC_CACHE_ALIGN_BUFFER_PAD(legacy_mbr, p_mbr, 1, dev_desc->blksz);
358 printf("%s: calloc failed!\n", __func__);
362 /* Read MBR to backup boot code if it exists */
363 if (blk_dread(dev_desc, 0, 1, p_mbr) != 1) {
364 pr_err("** Can't read from device %d **\n", dev_desc->devnum);
368 /* Clear all data in MBR except of backed up boot code */
369 memset((char *)p_mbr + MSDOS_MBR_BOOT_CODE_SIZE, 0, sizeof(*p_mbr) -
370 MSDOS_MBR_BOOT_CODE_SIZE);
372 /* Append signature */
373 p_mbr->signature = MSDOS_MBR_SIGNATURE;
374 p_mbr->partition_record[0].sys_ind = EFI_PMBR_OSTYPE_EFI_GPT;
375 p_mbr->partition_record[0].start_sect = 1;
376 p_mbr->partition_record[0].nr_sects = (u32) dev_desc->lba - 1;
378 /* Write MBR sector to the MMC device */
379 if (blk_dwrite(dev_desc, 0, 1, p_mbr) != 1) {
380 printf("** Can't write to device %d **\n",
388 int write_gpt_table(struct blk_desc *dev_desc,
389 gpt_header *gpt_h, gpt_entry *gpt_e)
391 const int pte_blk_cnt = BLOCK_CNT((gpt_h->num_partition_entries
392 * sizeof(gpt_entry)), dev_desc);
395 debug("max lba: %x\n", (u32) dev_desc->lba);
396 /* Setup the Protective MBR */
397 if (set_protective_mbr(dev_desc) < 0)
400 /* Generate CRC for the Primary GPT Header */
401 calc_crc32 = efi_crc32((const unsigned char *)gpt_e,
402 le32_to_cpu(gpt_h->num_partition_entries) *
403 le32_to_cpu(gpt_h->sizeof_partition_entry));
404 gpt_h->partition_entry_array_crc32 = cpu_to_le32(calc_crc32);
406 calc_crc32 = efi_crc32((const unsigned char *)gpt_h,
407 le32_to_cpu(gpt_h->header_size));
408 gpt_h->header_crc32 = cpu_to_le32(calc_crc32);
410 /* Write the First GPT to the block right after the Legacy MBR */
411 if (blk_dwrite(dev_desc, 1, 1, gpt_h) != 1)
414 if (blk_dwrite(dev_desc, le64_to_cpu(gpt_h->partition_entry_lba),
415 pte_blk_cnt, gpt_e) != pte_blk_cnt)
418 prepare_backup_gpt_header(gpt_h);
420 if (blk_dwrite(dev_desc, (lbaint_t)le64_to_cpu(gpt_h->last_usable_lba)
421 + 1, pte_blk_cnt, gpt_e) != pte_blk_cnt)
424 if (blk_dwrite(dev_desc, (lbaint_t)le64_to_cpu(gpt_h->my_lba), 1,
428 debug("GPT successfully written to block device!\n");
432 printf("** Can't write to device %d **\n", dev_desc->devnum);
436 int gpt_fill_pte(struct blk_desc *dev_desc,
437 gpt_header *gpt_h, gpt_entry *gpt_e,
438 disk_partition_t *partitions, int parts)
440 lbaint_t offset = (lbaint_t)le64_to_cpu(gpt_h->first_usable_lba);
441 lbaint_t last_usable_lba = (lbaint_t)
442 le64_to_cpu(gpt_h->last_usable_lba);
444 size_t efiname_len, dosname_len;
445 #if CONFIG_IS_ENABLED(PARTITION_UUIDS)
447 unsigned char *bin_uuid;
449 #ifdef CONFIG_PARTITION_TYPE_GUID
451 unsigned char *bin_type_guid;
453 size_t hdr_start = gpt_h->my_lba;
454 size_t hdr_end = hdr_start + 1;
456 size_t pte_start = gpt_h->partition_entry_lba;
457 size_t pte_end = pte_start +
458 gpt_h->num_partition_entries * gpt_h->sizeof_partition_entry /
461 for (i = 0; i < parts; i++) {
462 /* partition starting lba */
463 lbaint_t start = partitions[i].start;
464 lbaint_t size = partitions[i].size;
467 offset = start + size;
474 * If our partition overlaps with either the GPT
475 * header, or the partition entry, reject it.
477 if (((start < hdr_end && hdr_start < (start + size)) ||
478 (start < pte_end && pte_start < (start + size)))) {
479 printf("Partition overlap\n");
483 gpt_e[i].starting_lba = cpu_to_le64(start);
485 if (offset > (last_usable_lba + 1)) {
486 printf("Partitions layout exceds disk size\n");
489 /* partition ending lba */
490 if ((i == parts - 1) && (size == 0))
491 /* extend the last partition to maximuim */
492 gpt_e[i].ending_lba = gpt_h->last_usable_lba;
494 gpt_e[i].ending_lba = cpu_to_le64(offset - 1);
496 #ifdef CONFIG_PARTITION_TYPE_GUID
497 str_type_guid = partitions[i].type_guid;
498 bin_type_guid = gpt_e[i].partition_type_guid.b;
499 if (strlen(str_type_guid)) {
500 if (uuid_str_to_bin(str_type_guid, bin_type_guid,
501 UUID_STR_FORMAT_GUID)) {
502 printf("Partition no. %d: invalid type guid: %s\n",
507 /* default partition type GUID */
508 memcpy(bin_type_guid,
509 &partition_basic_data_guid, 16);
512 /* partition type GUID */
513 memcpy(gpt_e[i].partition_type_guid.b,
514 &partition_basic_data_guid, 16);
517 #if CONFIG_IS_ENABLED(PARTITION_UUIDS)
518 str_uuid = partitions[i].uuid;
519 bin_uuid = gpt_e[i].unique_partition_guid.b;
521 if (uuid_str_to_bin(str_uuid, bin_uuid, UUID_STR_FORMAT_GUID)) {
522 printf("Partition no. %d: invalid guid: %s\n",
528 /* partition attributes */
529 memset(&gpt_e[i].attributes, 0,
530 sizeof(gpt_entry_attributes));
532 if (partitions[i].bootable)
533 gpt_e[i].attributes.fields.legacy_bios_bootable = 1;
536 efiname_len = sizeof(gpt_e[i].partition_name)
537 / sizeof(efi_char16_t);
538 dosname_len = sizeof(partitions[i].name);
540 memset(gpt_e[i].partition_name, 0,
541 sizeof(gpt_e[i].partition_name));
543 for (k = 0; k < min(dosname_len, efiname_len); k++)
544 gpt_e[i].partition_name[k] =
545 (efi_char16_t)(partitions[i].name[k]);
547 debug("%s: name: %s offset[%d]: 0x" LBAF
548 " size[%d]: 0x" LBAF "\n",
549 __func__, partitions[i].name, i,
556 static uint32_t partition_entries_offset(struct blk_desc *dev_desc)
558 uint32_t offset_blks = 2;
559 uint32_t __maybe_unused offset_bytes;
560 int __maybe_unused config_offset;
562 #if defined(CONFIG_EFI_PARTITION_ENTRIES_OFF)
564 * Some architectures require their SPL loader at a fixed
565 * address within the first 16KB of the disk. To avoid an
566 * overlap with the partition entries of the EFI partition
567 * table, the first safe offset (in bytes, from the start of
568 * the disk) for the entries can be set in
569 * CONFIG_EFI_PARTITION_ENTRIES_OFF.
572 PAD_TO_BLOCKSIZE(CONFIG_EFI_PARTITION_ENTRIES_OFF, dev_desc);
573 offset_blks = offset_bytes / dev_desc->blksz;
576 #if defined(CONFIG_OF_CONTROL)
578 * Allow the offset of the first partition entires (in bytes
579 * from the start of the device) to be specified as a property
580 * of the device tree '/config' node.
582 config_offset = fdtdec_get_config_int(gd->fdt_blob,
583 "u-boot,efi-partition-entries-offset",
585 if (config_offset != -EINVAL) {
586 offset_bytes = PAD_TO_BLOCKSIZE(config_offset, dev_desc);
587 offset_blks = offset_bytes / dev_desc->blksz;
591 debug("efi: partition entries offset (in blocks): %d\n", offset_blks);
594 * The earliest LBA this can be at is LBA#2 (i.e. right behind
595 * the (protective) MBR and the GPT header.
603 int gpt_fill_header(struct blk_desc *dev_desc, gpt_header *gpt_h,
604 char *str_guid, int parts_count)
606 gpt_h->signature = cpu_to_le64(GPT_HEADER_SIGNATURE_UBOOT);
607 gpt_h->revision = cpu_to_le32(GPT_HEADER_REVISION_V1);
608 gpt_h->header_size = cpu_to_le32(sizeof(gpt_header));
609 gpt_h->my_lba = cpu_to_le64(1);
610 gpt_h->alternate_lba = cpu_to_le64(dev_desc->lba - 1);
611 gpt_h->last_usable_lba = cpu_to_le64(dev_desc->lba - 34);
612 gpt_h->partition_entry_lba =
613 cpu_to_le64(partition_entries_offset(dev_desc));
614 gpt_h->first_usable_lba =
615 cpu_to_le64(le64_to_cpu(gpt_h->partition_entry_lba) + 32);
616 gpt_h->num_partition_entries = cpu_to_le32(GPT_ENTRY_NUMBERS);
617 gpt_h->sizeof_partition_entry = cpu_to_le32(sizeof(gpt_entry));
618 gpt_h->header_crc32 = 0;
619 gpt_h->partition_entry_array_crc32 = 0;
621 if (uuid_str_to_bin(str_guid, gpt_h->disk_guid.b, UUID_STR_FORMAT_GUID))
627 int gpt_restore(struct blk_desc *dev_desc, char *str_disk_guid,
628 disk_partition_t *partitions, int parts_count)
634 size = PAD_TO_BLOCKSIZE(sizeof(gpt_header), dev_desc);
635 gpt_h = malloc_cache_aligned(size);
637 printf("%s: calloc failed!\n", __func__);
640 memset(gpt_h, 0, size);
642 size = PAD_TO_BLOCKSIZE(GPT_ENTRY_NUMBERS * sizeof(gpt_entry),
644 gpt_e = malloc_cache_aligned(size);
646 printf("%s: calloc failed!\n", __func__);
650 memset(gpt_e, 0, size);
652 /* Generate Primary GPT header (LBA1) */
653 ret = gpt_fill_header(dev_desc, gpt_h, str_disk_guid, parts_count);
657 /* Generate partition entries */
658 ret = gpt_fill_pte(dev_desc, gpt_h, gpt_e, partitions, parts_count);
662 /* Write GPT partition table */
663 ret = write_gpt_table(dev_desc, gpt_h, gpt_e);
671 static void gpt_convert_efi_name_to_char(char *s, efi_char16_t *es, int n)
673 char *ess = (char *)es;
678 for (i = 0, j = 0; j < n; i += 2, j++) {
685 int gpt_verify_headers(struct blk_desc *dev_desc, gpt_header *gpt_head,
689 * This function validates AND
690 * fills in the GPT header and PTE
692 if (is_gpt_valid(dev_desc,
693 GPT_PRIMARY_PARTITION_TABLE_LBA,
694 gpt_head, gpt_pte) != 1) {
695 printf("%s: *** ERROR: Invalid GPT ***\n",
699 if (is_gpt_valid(dev_desc, (dev_desc->lba - 1),
700 gpt_head, gpt_pte) != 1) {
701 printf("%s: *** ERROR: Invalid Backup GPT ***\n",
709 int gpt_verify_partitions(struct blk_desc *dev_desc,
710 disk_partition_t *partitions, int parts,
711 gpt_header *gpt_head, gpt_entry **gpt_pte)
713 char efi_str[PARTNAME_SZ + 1];
718 ret = gpt_verify_headers(dev_desc, gpt_head, gpt_pte);
724 for (i = 0; i < parts; i++) {
725 if (i == gpt_head->num_partition_entries) {
726 pr_err("More partitions than allowed!\n");
730 /* Check if GPT and ENV partition names match */
731 gpt_convert_efi_name_to_char(efi_str, gpt_e[i].partition_name,
734 debug("%s: part: %2d name - GPT: %16s, ENV: %16s ",
735 __func__, i, efi_str, partitions[i].name);
737 if (strncmp(efi_str, (char *)partitions[i].name,
738 sizeof(partitions->name))) {
739 pr_err("Partition name: %s does not match %s!\n",
740 efi_str, (char *)partitions[i].name);
744 /* Check if GPT and ENV sizes match */
745 gpt_part_size = le64_to_cpu(gpt_e[i].ending_lba) -
746 le64_to_cpu(gpt_e[i].starting_lba) + 1;
747 debug("size(LBA) - GPT: %8llu, ENV: %8llu ",
748 (unsigned long long)gpt_part_size,
749 (unsigned long long)partitions[i].size);
751 if (le64_to_cpu(gpt_part_size) != partitions[i].size) {
752 /* We do not check the extend partition size */
753 if ((i == parts - 1) && (partitions[i].size == 0))
756 pr_err("Partition %s size: %llu does not match %llu!\n",
757 efi_str, (unsigned long long)gpt_part_size,
758 (unsigned long long)partitions[i].size);
763 * Start address is optional - check only if provided
764 * in '$partition' variable
766 if (!partitions[i].start) {
771 /* Check if GPT and ENV start LBAs match */
772 debug("start LBA - GPT: %8llu, ENV: %8llu\n",
773 le64_to_cpu(gpt_e[i].starting_lba),
774 (unsigned long long)partitions[i].start);
776 if (le64_to_cpu(gpt_e[i].starting_lba) != partitions[i].start) {
777 pr_err("Partition %s start: %llu does not match %llu!\n",
778 efi_str, le64_to_cpu(gpt_e[i].starting_lba),
779 (unsigned long long)partitions[i].start);
787 int is_valid_gpt_buf(struct blk_desc *dev_desc, void *buf)
792 /* determine start of GPT Header in the buffer */
793 gpt_h = buf + (GPT_PRIMARY_PARTITION_TABLE_LBA *
795 if (validate_gpt_header(gpt_h, GPT_PRIMARY_PARTITION_TABLE_LBA,
799 /* determine start of GPT Entries in the buffer */
800 gpt_e = buf + (le64_to_cpu(gpt_h->partition_entry_lba) *
802 if (validate_gpt_entries(gpt_h, gpt_e))
808 int write_mbr_and_gpt_partitions(struct blk_desc *dev_desc, void *buf)
816 if (is_valid_gpt_buf(dev_desc, buf))
819 /* determine start of GPT Header in the buffer */
820 gpt_h = buf + (GPT_PRIMARY_PARTITION_TABLE_LBA *
823 /* determine start of GPT Entries in the buffer */
824 gpt_e = buf + (le64_to_cpu(gpt_h->partition_entry_lba) *
826 gpt_e_blk_cnt = BLOCK_CNT((le32_to_cpu(gpt_h->num_partition_entries) *
827 le32_to_cpu(gpt_h->sizeof_partition_entry)),
831 lba = 0; /* MBR is always at 0 */
832 cnt = 1; /* MBR (1 block) */
833 if (blk_dwrite(dev_desc, lba, cnt, buf) != cnt) {
834 printf("%s: failed writing '%s' (%d blks at 0x" LBAF ")\n",
835 __func__, "MBR", cnt, lba);
839 /* write Primary GPT */
840 lba = GPT_PRIMARY_PARTITION_TABLE_LBA;
841 cnt = 1; /* GPT Header (1 block) */
842 if (blk_dwrite(dev_desc, lba, cnt, gpt_h) != cnt) {
843 printf("%s: failed writing '%s' (%d blks at 0x" LBAF ")\n",
844 __func__, "Primary GPT Header", cnt, lba);
848 lba = le64_to_cpu(gpt_h->partition_entry_lba);
850 if (blk_dwrite(dev_desc, lba, cnt, gpt_e) != cnt) {
851 printf("%s: failed writing '%s' (%d blks at 0x" LBAF ")\n",
852 __func__, "Primary GPT Entries", cnt, lba);
856 prepare_backup_gpt_header(gpt_h);
858 /* write Backup GPT */
859 lba = le64_to_cpu(gpt_h->partition_entry_lba);
861 if (blk_dwrite(dev_desc, lba, cnt, gpt_e) != cnt) {
862 printf("%s: failed writing '%s' (%d blks at 0x" LBAF ")\n",
863 __func__, "Backup GPT Entries", cnt, lba);
867 lba = le64_to_cpu(gpt_h->my_lba);
868 cnt = 1; /* GPT Header (1 block) */
869 if (blk_dwrite(dev_desc, lba, cnt, gpt_h) != cnt) {
870 printf("%s: failed writing '%s' (%d blks at 0x" LBAF ")\n",
871 __func__, "Backup GPT Header", cnt, lba);
883 * pmbr_part_valid(): Check for EFI partition signature
885 * Returns: 1 if EFI GPT partition type is found.
887 static int pmbr_part_valid(struct partition *part)
889 if (part->sys_ind == EFI_PMBR_OSTYPE_EFI_GPT &&
890 get_unaligned_le32(&part->start_sect) == 1UL) {
898 * is_pmbr_valid(): test Protective MBR for validity
900 * Returns: 1 if PMBR is valid, 0 otherwise.
901 * Validity depends on two things:
902 * 1) MSDOS signature is in the last two bytes of the MBR
903 * 2) One partition of type 0xEE is found, checked by pmbr_part_valid()
905 static int is_pmbr_valid(legacy_mbr * mbr)
909 if (!mbr || le16_to_cpu(mbr->signature) != MSDOS_MBR_SIGNATURE)
912 for (i = 0; i < 4; i++) {
913 if (pmbr_part_valid(&mbr->partition_record[i])) {
921 * is_gpt_valid() - tests one GPT header and PTEs for validity
923 * lba is the logical block address of the GPT header to test
924 * gpt is a GPT header ptr, filled on return.
925 * ptes is a PTEs ptr, filled on return.
927 * Description: returns 1 if valid, 0 on error.
928 * If valid, returns pointers to PTEs.
930 static int is_gpt_valid(struct blk_desc *dev_desc, u64 lba,
931 gpt_header *pgpt_head, gpt_entry **pgpt_pte)
933 /* Confirm valid arguments prior to allocation. */
934 if (!dev_desc || !pgpt_head) {
935 printf("%s: Invalid Argument(s)\n", __func__);
939 ALLOC_CACHE_ALIGN_BUFFER_PAD(legacy_mbr, mbr, 1, dev_desc->blksz);
941 /* Read MBR Header from device */
942 if (blk_dread(dev_desc, 0, 1, (ulong *)mbr) != 1) {
943 printf("*** ERROR: Can't read MBR header ***\n");
947 /* Read GPT Header from device */
948 if (blk_dread(dev_desc, (lbaint_t)lba, 1, pgpt_head) != 1) {
949 printf("*** ERROR: Can't read GPT header ***\n");
953 if (validate_gpt_header(pgpt_head, (lbaint_t)lba, dev_desc->lba))
956 if (dev_desc->sig_type == SIG_TYPE_NONE) {
957 efi_guid_t empty = {};
958 if (memcmp(&pgpt_head->disk_guid, &empty, sizeof(empty))) {
959 dev_desc->sig_type = SIG_TYPE_GUID;
960 memcpy(&dev_desc->guid_sig, &pgpt_head->disk_guid,
962 } else if (mbr->unique_mbr_signature != 0) {
963 dev_desc->sig_type = SIG_TYPE_MBR;
964 dev_desc->mbr_sig = mbr->unique_mbr_signature;
968 /* Read and allocate Partition Table Entries */
969 *pgpt_pte = alloc_read_gpt_entries(dev_desc, pgpt_head);
970 if (*pgpt_pte == NULL) {
971 printf("GPT: Failed to allocate memory for PTE\n");
975 if (validate_gpt_entries(pgpt_head, *pgpt_pte)) {
980 /* We're done, all's well */
985 * alloc_read_gpt_entries(): reads partition entries from disk
989 * Description: Returns ptes on success, NULL on error.
990 * Allocates space for PTEs based on information found in @gpt.
991 * Notes: remember to free pte when you're done!
993 static gpt_entry *alloc_read_gpt_entries(struct blk_desc *dev_desc,
994 gpt_header *pgpt_head)
996 size_t count = 0, blk_cnt;
998 gpt_entry *pte = NULL;
1000 if (!dev_desc || !pgpt_head) {
1001 printf("%s: Invalid Argument(s)\n", __func__);
1005 count = le32_to_cpu(pgpt_head->num_partition_entries) *
1006 le32_to_cpu(pgpt_head->sizeof_partition_entry);
1008 debug("%s: count = %u * %u = %lu\n", __func__,
1009 (u32) le32_to_cpu(pgpt_head->num_partition_entries),
1010 (u32) le32_to_cpu(pgpt_head->sizeof_partition_entry),
1013 /* Allocate memory for PTE, remember to FREE */
1015 pte = memalign(ARCH_DMA_MINALIGN,
1016 PAD_TO_BLOCKSIZE(count, dev_desc));
1019 if (count == 0 || pte == NULL) {
1020 printf("%s: ERROR: Can't allocate %#lX bytes for GPT Entries\n",
1021 __func__, (ulong)count);
1025 /* Read GPT Entries from device */
1026 blk = le64_to_cpu(pgpt_head->partition_entry_lba);
1027 blk_cnt = BLOCK_CNT(count, dev_desc);
1028 if (blk_dread(dev_desc, blk, (lbaint_t)blk_cnt, pte) != blk_cnt) {
1029 printf("*** ERROR: Can't read GPT Entries ***\n");
1037 * is_pte_valid(): validates a single Partition Table Entry
1038 * @gpt_entry - Pointer to a single Partition Table Entry
1040 * Description: returns 1 if valid, 0 on error.
1042 static int is_pte_valid(gpt_entry * pte)
1044 efi_guid_t unused_guid;
1047 printf("%s: Invalid Argument(s)\n", __func__);
1051 /* Only one validation for now:
1052 * The GUID Partition Type != Unused Entry (ALL-ZERO)
1054 memset(unused_guid.b, 0, sizeof(unused_guid.b));
1056 if (memcmp(pte->partition_type_guid.b, unused_guid.b,
1057 sizeof(unused_guid.b)) == 0) {
1059 debug("%s: Found an unused PTE GUID at 0x%08X\n", __func__,
1060 (unsigned int)(uintptr_t)pte);
1069 * Add an 'a_' prefix so it comes before 'dos' in the linker list. We need to
1070 * check EFI first, since a DOS partition is often used as a 'protective MBR'
1073 U_BOOT_PART_TYPE(a_efi) = {
1075 .part_type = PART_TYPE_EFI,
1076 .max_entries = GPT_ENTRY_NUMBERS,
1077 .get_info = part_get_info_ptr(part_get_info_efi),
1078 .print = part_print_ptr(part_print_efi),
1079 .test = part_test_efi,