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 <linux/compiler.h>
27 #include <linux/ctype.h>
28 #include <u-boot/crc.h>
30 DECLARE_GLOBAL_DATA_PTR;
33 * GUID for basic data partions.
35 static const efi_guid_t partition_basic_data_guid = PARTITION_BASIC_DATA_GUID;
37 #ifdef CONFIG_HAVE_BLOCK_DEVICE
39 * efi_crc32() - EFI version of crc32 function
40 * @buf: buffer to calculate crc32 of
41 * @len - length of buf
43 * Description: Returns EFI-style CRC32 value for @buf
45 static inline u32 efi_crc32(const void *buf, u32 len)
47 return crc32(0, buf, len);
51 * Private function prototypes
54 static int pmbr_part_valid(struct partition *part);
55 static int is_pmbr_valid(legacy_mbr * mbr);
56 static int is_gpt_valid(struct blk_desc *dev_desc, u64 lba,
57 gpt_header *pgpt_head, gpt_entry **pgpt_pte);
58 static gpt_entry *alloc_read_gpt_entries(struct blk_desc *dev_desc,
59 gpt_header *pgpt_head);
60 static int is_pte_valid(gpt_entry * pte);
61 static int find_valid_gpt(struct blk_desc *dev_desc, gpt_header *gpt_head,
62 gpt_entry **pgpt_pte);
64 static char *print_efiname(gpt_entry *pte)
66 static char name[PARTNAME_SZ + 1];
68 for (i = 0; i < PARTNAME_SZ; i++) {
70 c = pte->partition_name[i] & 0xff;
71 c = (c && !isprint(c)) ? '.' : c;
74 name[PARTNAME_SZ] = 0;
78 static const efi_guid_t system_guid = PARTITION_SYSTEM_GUID;
80 static int get_bootable(gpt_entry *p)
84 if (!memcmp(&p->partition_type_guid, &system_guid, sizeof(efi_guid_t)))
85 ret |= PART_EFI_SYSTEM_PARTITION;
86 if (p->attributes.fields.legacy_bios_bootable)
91 static int validate_gpt_header(gpt_header *gpt_h, lbaint_t lba,
94 uint32_t crc32_backup = 0;
97 /* Check the GPT header signature */
98 if (le64_to_cpu(gpt_h->signature) != GPT_HEADER_SIGNATURE_UBOOT) {
99 printf("%s signature is wrong: 0x%llX != 0x%llX\n",
100 "GUID Partition Table Header",
101 le64_to_cpu(gpt_h->signature),
102 GPT_HEADER_SIGNATURE_UBOOT);
106 /* Check the GUID Partition Table CRC */
107 memcpy(&crc32_backup, &gpt_h->header_crc32, sizeof(crc32_backup));
108 memset(&gpt_h->header_crc32, 0, sizeof(gpt_h->header_crc32));
110 calc_crc32 = efi_crc32((const unsigned char *)gpt_h,
111 le32_to_cpu(gpt_h->header_size));
113 memcpy(&gpt_h->header_crc32, &crc32_backup, sizeof(crc32_backup));
115 if (calc_crc32 != le32_to_cpu(crc32_backup)) {
116 printf("%s CRC is wrong: 0x%x != 0x%x\n",
117 "GUID Partition Table Header",
118 le32_to_cpu(crc32_backup), calc_crc32);
123 * Check that the my_lba entry points to the LBA that contains the GPT
125 if (le64_to_cpu(gpt_h->my_lba) != lba) {
126 printf("GPT: my_lba incorrect: %llX != " LBAF "\n",
127 le64_to_cpu(gpt_h->my_lba),
133 * Check that the first_usable_lba and that the last_usable_lba are
136 if (le64_to_cpu(gpt_h->first_usable_lba) > lastlba) {
137 printf("GPT: first_usable_lba incorrect: %llX > " LBAF "\n",
138 le64_to_cpu(gpt_h->first_usable_lba), lastlba);
141 if (le64_to_cpu(gpt_h->last_usable_lba) > lastlba) {
142 printf("GPT: last_usable_lba incorrect: %llX > " LBAF "\n",
143 le64_to_cpu(gpt_h->last_usable_lba), lastlba);
147 debug("GPT: first_usable_lba: %llX last_usable_lba: %llX last lba: "
148 LBAF "\n", le64_to_cpu(gpt_h->first_usable_lba),
149 le64_to_cpu(gpt_h->last_usable_lba), lastlba);
154 static int validate_gpt_entries(gpt_header *gpt_h, gpt_entry *gpt_e)
158 /* Check the GUID Partition Table Entry Array CRC */
159 calc_crc32 = efi_crc32((const unsigned char *)gpt_e,
160 le32_to_cpu(gpt_h->num_partition_entries) *
161 le32_to_cpu(gpt_h->sizeof_partition_entry));
163 if (calc_crc32 != le32_to_cpu(gpt_h->partition_entry_array_crc32)) {
164 printf("%s: 0x%x != 0x%x\n",
165 "GUID Partition Table Entry Array CRC is wrong",
166 le32_to_cpu(gpt_h->partition_entry_array_crc32),
174 static void prepare_backup_gpt_header(gpt_header *gpt_h)
179 /* recalculate the values for the Backup GPT Header */
180 val = le64_to_cpu(gpt_h->my_lba);
181 gpt_h->my_lba = gpt_h->alternate_lba;
182 gpt_h->alternate_lba = cpu_to_le64(val);
183 gpt_h->partition_entry_lba =
184 cpu_to_le64(le64_to_cpu(gpt_h->last_usable_lba) + 1);
185 gpt_h->header_crc32 = 0;
187 calc_crc32 = efi_crc32((const unsigned char *)gpt_h,
188 le32_to_cpu(gpt_h->header_size));
189 gpt_h->header_crc32 = cpu_to_le32(calc_crc32);
192 #if CONFIG_IS_ENABLED(EFI_PARTITION)
194 * Public Functions (include/part.h)
198 * UUID is displayed as 32 hexadecimal digits, in 5 groups,
199 * separated by hyphens, in the form 8-4-4-4-12 for a total of 36 characters
201 int get_disk_guid(struct blk_desc * dev_desc, char *guid)
203 ALLOC_CACHE_ALIGN_BUFFER_PAD(gpt_header, gpt_head, 1, dev_desc->blksz);
204 gpt_entry *gpt_pte = NULL;
205 unsigned char *guid_bin;
207 /* This function validates AND fills in the GPT header and PTE */
208 if (find_valid_gpt(dev_desc, gpt_head, &gpt_pte) != 1)
211 guid_bin = gpt_head->disk_guid.b;
212 uuid_bin_to_str(guid_bin, guid, UUID_STR_FORMAT_GUID);
214 /* Remember to free pte */
219 void part_print_efi(struct blk_desc *dev_desc)
221 ALLOC_CACHE_ALIGN_BUFFER_PAD(gpt_header, gpt_head, 1, dev_desc->blksz);
222 gpt_entry *gpt_pte = NULL;
224 char uuid[UUID_STR_LEN + 1];
225 unsigned char *uuid_bin;
227 /* This function validates AND fills in the GPT header and PTE */
228 if (find_valid_gpt(dev_desc, gpt_head, &gpt_pte) != 1)
231 debug("%s: gpt-entry at %p\n", __func__, gpt_pte);
233 printf("Part\tStart LBA\tEnd LBA\t\tName\n");
234 printf("\tAttributes\n");
235 printf("\tType GUID\n");
236 printf("\tPartition GUID\n");
238 for (i = 0; i < le32_to_cpu(gpt_head->num_partition_entries); i++) {
239 /* Stop at the first non valid PTE */
240 if (!is_pte_valid(&gpt_pte[i]))
243 printf("%3d\t0x%08llx\t0x%08llx\t\"%s\"\n", (i + 1),
244 le64_to_cpu(gpt_pte[i].starting_lba),
245 le64_to_cpu(gpt_pte[i].ending_lba),
246 print_efiname(&gpt_pte[i]));
247 printf("\tattrs:\t0x%016llx\n", gpt_pte[i].attributes.raw);
248 uuid_bin = (unsigned char *)gpt_pte[i].partition_type_guid.b;
249 uuid_bin_to_str(uuid_bin, uuid, UUID_STR_FORMAT_GUID);
250 printf("\ttype:\t%s\n", uuid);
251 if (CONFIG_IS_ENABLED(PARTITION_TYPE_GUID)) {
252 const char *type = uuid_guid_get_str(uuid_bin);
254 printf("\ttype:\t%s\n", type);
256 uuid_bin = (unsigned char *)gpt_pte[i].unique_partition_guid.b;
257 uuid_bin_to_str(uuid_bin, uuid, UUID_STR_FORMAT_GUID);
258 printf("\tguid:\t%s\n", uuid);
261 /* Remember to free pte */
266 int part_get_info_efi(struct blk_desc *dev_desc, int part,
267 struct disk_partition *info)
269 ALLOC_CACHE_ALIGN_BUFFER_PAD(gpt_header, gpt_head, 1, dev_desc->blksz);
270 gpt_entry *gpt_pte = NULL;
272 /* "part" argument must be at least 1 */
274 printf("%s: Invalid Argument(s)\n", __func__);
278 /* This function validates AND fills in the GPT header and PTE */
279 if (find_valid_gpt(dev_desc, gpt_head, &gpt_pte) != 1)
282 if (part > le32_to_cpu(gpt_head->num_partition_entries) ||
283 !is_pte_valid(&gpt_pte[part - 1])) {
284 debug("%s: *** ERROR: Invalid partition number %d ***\n",
290 /* The 'lbaint_t' casting may limit the maximum disk size to 2 TB */
291 info->start = (lbaint_t)le64_to_cpu(gpt_pte[part - 1].starting_lba);
292 /* The ending LBA is inclusive, to calculate size, add 1 to it */
293 info->size = (lbaint_t)le64_to_cpu(gpt_pte[part - 1].ending_lba) + 1
295 info->blksz = dev_desc->blksz;
297 snprintf((char *)info->name, sizeof(info->name), "%s",
298 print_efiname(&gpt_pte[part - 1]));
299 strcpy((char *)info->type, "U-Boot");
300 info->bootable = get_bootable(&gpt_pte[part - 1]);
301 #if CONFIG_IS_ENABLED(PARTITION_UUIDS)
302 uuid_bin_to_str(gpt_pte[part - 1].unique_partition_guid.b, info->uuid,
303 UUID_STR_FORMAT_GUID);
305 #ifdef CONFIG_PARTITION_TYPE_GUID
306 uuid_bin_to_str(gpt_pte[part - 1].partition_type_guid.b,
307 info->type_guid, UUID_STR_FORMAT_GUID);
310 debug("%s: start 0x" LBAF ", size 0x" LBAF ", name %s\n", __func__,
311 info->start, info->size, info->name);
313 /* Remember to free pte */
318 static int part_test_efi(struct blk_desc *dev_desc)
320 ALLOC_CACHE_ALIGN_BUFFER_PAD(legacy_mbr, legacymbr, 1, dev_desc->blksz);
322 /* Read legacy MBR from block 0 and validate it */
323 if ((blk_dread(dev_desc, 0, 1, (ulong *)legacymbr) != 1)
324 || (is_pmbr_valid(legacymbr) != 1)) {
331 * set_protective_mbr(): Set the EFI protective MBR
332 * @param dev_desc - block device descriptor
334 * @return - zero on success, otherwise error
336 static int set_protective_mbr(struct blk_desc *dev_desc)
338 /* Setup the Protective MBR */
339 ALLOC_CACHE_ALIGN_BUFFER_PAD(legacy_mbr, p_mbr, 1, dev_desc->blksz);
341 printf("%s: calloc failed!\n", __func__);
345 /* Read MBR to backup boot code if it exists */
346 if (blk_dread(dev_desc, 0, 1, p_mbr) != 1) {
347 pr_err("** Can't read from device %d **\n", dev_desc->devnum);
351 /* Clear all data in MBR except of backed up boot code */
352 memset((char *)p_mbr + MSDOS_MBR_BOOT_CODE_SIZE, 0, sizeof(*p_mbr) -
353 MSDOS_MBR_BOOT_CODE_SIZE);
355 /* Append signature */
356 p_mbr->signature = MSDOS_MBR_SIGNATURE;
357 p_mbr->partition_record[0].sys_ind = EFI_PMBR_OSTYPE_EFI_GPT;
358 p_mbr->partition_record[0].start_sect = 1;
359 p_mbr->partition_record[0].nr_sects = (u32) dev_desc->lba - 1;
361 /* Write MBR sector to the MMC device */
362 if (blk_dwrite(dev_desc, 0, 1, p_mbr) != 1) {
363 printf("** Can't write to device %d **\n",
371 int write_gpt_table(struct blk_desc *dev_desc,
372 gpt_header *gpt_h, gpt_entry *gpt_e)
374 const int pte_blk_cnt = BLOCK_CNT((gpt_h->num_partition_entries
375 * sizeof(gpt_entry)), dev_desc);
378 debug("max lba: %x\n", (u32) dev_desc->lba);
379 /* Setup the Protective MBR */
380 if (set_protective_mbr(dev_desc) < 0)
383 /* Generate CRC for the Primary GPT Header */
384 calc_crc32 = efi_crc32((const unsigned char *)gpt_e,
385 le32_to_cpu(gpt_h->num_partition_entries) *
386 le32_to_cpu(gpt_h->sizeof_partition_entry));
387 gpt_h->partition_entry_array_crc32 = cpu_to_le32(calc_crc32);
389 calc_crc32 = efi_crc32((const unsigned char *)gpt_h,
390 le32_to_cpu(gpt_h->header_size));
391 gpt_h->header_crc32 = cpu_to_le32(calc_crc32);
393 /* Write the First GPT to the block right after the Legacy MBR */
394 if (blk_dwrite(dev_desc, 1, 1, gpt_h) != 1)
397 if (blk_dwrite(dev_desc, le64_to_cpu(gpt_h->partition_entry_lba),
398 pte_blk_cnt, gpt_e) != pte_blk_cnt)
401 prepare_backup_gpt_header(gpt_h);
403 if (blk_dwrite(dev_desc, (lbaint_t)le64_to_cpu(gpt_h->last_usable_lba)
404 + 1, pte_blk_cnt, gpt_e) != pte_blk_cnt)
407 if (blk_dwrite(dev_desc, (lbaint_t)le64_to_cpu(gpt_h->my_lba), 1,
411 debug("GPT successfully written to block device!\n");
415 printf("** Can't write to device %d **\n", dev_desc->devnum);
419 int gpt_fill_pte(struct blk_desc *dev_desc,
420 gpt_header *gpt_h, gpt_entry *gpt_e,
421 struct disk_partition *partitions, int parts)
423 lbaint_t offset = (lbaint_t)le64_to_cpu(gpt_h->first_usable_lba);
424 lbaint_t last_usable_lba = (lbaint_t)
425 le64_to_cpu(gpt_h->last_usable_lba);
427 size_t efiname_len, dosname_len;
428 #if CONFIG_IS_ENABLED(PARTITION_UUIDS)
430 unsigned char *bin_uuid;
432 #ifdef CONFIG_PARTITION_TYPE_GUID
434 unsigned char *bin_type_guid;
436 size_t hdr_start = gpt_h->my_lba;
437 size_t hdr_end = hdr_start + 1;
439 size_t pte_start = gpt_h->partition_entry_lba;
440 size_t pte_end = pte_start +
441 gpt_h->num_partition_entries * gpt_h->sizeof_partition_entry /
444 for (i = 0; i < parts; i++) {
445 /* partition starting lba */
446 lbaint_t start = partitions[i].start;
447 lbaint_t size = partitions[i].size;
450 offset = start + size;
457 * If our partition overlaps with either the GPT
458 * header, or the partition entry, reject it.
460 if (((start < hdr_end && hdr_start < (start + size)) ||
461 (start < pte_end && pte_start < (start + size)))) {
462 printf("Partition overlap\n");
466 gpt_e[i].starting_lba = cpu_to_le64(start);
468 if (offset > (last_usable_lba + 1)) {
469 printf("Partitions layout exceds disk size\n");
472 /* partition ending lba */
473 if ((i == parts - 1) && (size == 0))
474 /* extend the last partition to maximuim */
475 gpt_e[i].ending_lba = gpt_h->last_usable_lba;
477 gpt_e[i].ending_lba = cpu_to_le64(offset - 1);
479 #ifdef CONFIG_PARTITION_TYPE_GUID
480 str_type_guid = partitions[i].type_guid;
481 bin_type_guid = gpt_e[i].partition_type_guid.b;
482 if (strlen(str_type_guid)) {
483 if (uuid_str_to_bin(str_type_guid, bin_type_guid,
484 UUID_STR_FORMAT_GUID)) {
485 printf("Partition no. %d: invalid type guid: %s\n",
490 /* default partition type GUID */
491 memcpy(bin_type_guid,
492 &partition_basic_data_guid, 16);
495 /* partition type GUID */
496 memcpy(gpt_e[i].partition_type_guid.b,
497 &partition_basic_data_guid, 16);
500 #if CONFIG_IS_ENABLED(PARTITION_UUIDS)
501 str_uuid = partitions[i].uuid;
502 bin_uuid = gpt_e[i].unique_partition_guid.b;
504 if (uuid_str_to_bin(str_uuid, bin_uuid, UUID_STR_FORMAT_GUID)) {
505 printf("Partition no. %d: invalid guid: %s\n",
511 /* partition attributes */
512 memset(&gpt_e[i].attributes, 0,
513 sizeof(gpt_entry_attributes));
515 if (partitions[i].bootable & PART_BOOTABLE)
516 gpt_e[i].attributes.fields.legacy_bios_bootable = 1;
519 efiname_len = sizeof(gpt_e[i].partition_name)
520 / sizeof(efi_char16_t);
521 dosname_len = sizeof(partitions[i].name);
523 memset(gpt_e[i].partition_name, 0,
524 sizeof(gpt_e[i].partition_name));
526 for (k = 0; k < min(dosname_len, efiname_len); k++)
527 gpt_e[i].partition_name[k] =
528 (efi_char16_t)(partitions[i].name[k]);
530 debug("%s: name: %s offset[%d]: 0x" LBAF
531 " size[%d]: 0x" LBAF "\n",
532 __func__, partitions[i].name, i,
539 static uint32_t partition_entries_offset(struct blk_desc *dev_desc)
541 uint32_t offset_blks = 2;
542 uint32_t __maybe_unused offset_bytes;
543 int __maybe_unused config_offset;
545 #if defined(CONFIG_EFI_PARTITION_ENTRIES_OFF)
547 * Some architectures require their SPL loader at a fixed
548 * address within the first 16KB of the disk. To avoid an
549 * overlap with the partition entries of the EFI partition
550 * table, the first safe offset (in bytes, from the start of
551 * the disk) for the entries can be set in
552 * CONFIG_EFI_PARTITION_ENTRIES_OFF.
555 PAD_TO_BLOCKSIZE(CONFIG_EFI_PARTITION_ENTRIES_OFF, dev_desc);
556 offset_blks = offset_bytes / dev_desc->blksz;
559 #if defined(CONFIG_OF_CONTROL)
561 * Allow the offset of the first partition entires (in bytes
562 * from the start of the device) to be specified as a property
563 * of the device tree '/config' node.
565 config_offset = fdtdec_get_config_int(gd->fdt_blob,
566 "u-boot,efi-partition-entries-offset",
568 if (config_offset != -EINVAL) {
569 offset_bytes = PAD_TO_BLOCKSIZE(config_offset, dev_desc);
570 offset_blks = offset_bytes / dev_desc->blksz;
574 debug("efi: partition entries offset (in blocks): %d\n", offset_blks);
577 * The earliest LBA this can be at is LBA#2 (i.e. right behind
578 * the (protective) MBR and the GPT header.
586 int gpt_fill_header(struct blk_desc *dev_desc, gpt_header *gpt_h,
587 char *str_guid, int parts_count)
589 gpt_h->signature = cpu_to_le64(GPT_HEADER_SIGNATURE_UBOOT);
590 gpt_h->revision = cpu_to_le32(GPT_HEADER_REVISION_V1);
591 gpt_h->header_size = cpu_to_le32(sizeof(gpt_header));
592 gpt_h->my_lba = cpu_to_le64(1);
593 gpt_h->alternate_lba = cpu_to_le64(dev_desc->lba - 1);
594 gpt_h->last_usable_lba = cpu_to_le64(dev_desc->lba - 34);
595 gpt_h->partition_entry_lba =
596 cpu_to_le64(partition_entries_offset(dev_desc));
597 gpt_h->first_usable_lba =
598 cpu_to_le64(le64_to_cpu(gpt_h->partition_entry_lba) + 32);
599 gpt_h->num_partition_entries = cpu_to_le32(GPT_ENTRY_NUMBERS);
600 gpt_h->sizeof_partition_entry = cpu_to_le32(sizeof(gpt_entry));
601 gpt_h->header_crc32 = 0;
602 gpt_h->partition_entry_array_crc32 = 0;
604 if (uuid_str_to_bin(str_guid, gpt_h->disk_guid.b, UUID_STR_FORMAT_GUID))
610 int gpt_restore(struct blk_desc *dev_desc, char *str_disk_guid,
611 struct disk_partition *partitions, int parts_count)
617 size = PAD_TO_BLOCKSIZE(sizeof(gpt_header), dev_desc);
618 gpt_h = malloc_cache_aligned(size);
620 printf("%s: calloc failed!\n", __func__);
623 memset(gpt_h, 0, size);
625 size = PAD_TO_BLOCKSIZE(GPT_ENTRY_NUMBERS * sizeof(gpt_entry),
627 gpt_e = malloc_cache_aligned(size);
629 printf("%s: calloc failed!\n", __func__);
633 memset(gpt_e, 0, size);
635 /* Generate Primary GPT header (LBA1) */
636 ret = gpt_fill_header(dev_desc, gpt_h, str_disk_guid, parts_count);
640 /* Generate partition entries */
641 ret = gpt_fill_pte(dev_desc, gpt_h, gpt_e, partitions, parts_count);
645 /* Write GPT partition table */
646 ret = write_gpt_table(dev_desc, gpt_h, gpt_e);
655 * gpt_convert_efi_name_to_char() - convert u16 string to char string
657 * TODO: this conversion only supports ANSI characters
660 * @es: u16 string to be converted
661 * @n: size of target buffer
663 static void gpt_convert_efi_name_to_char(char *s, void *es, int n)
670 for (i = 0, j = 0; j < n; i += 2, j++) {
677 int gpt_verify_headers(struct blk_desc *dev_desc, gpt_header *gpt_head,
681 * This function validates AND
682 * fills in the GPT header and PTE
684 if (is_gpt_valid(dev_desc,
685 GPT_PRIMARY_PARTITION_TABLE_LBA,
686 gpt_head, gpt_pte) != 1) {
687 printf("%s: *** ERROR: Invalid GPT ***\n",
692 /* Free pte before allocating again */
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 struct disk_partition *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);
871 /* Update the partition table entries*/
882 * pmbr_part_valid(): Check for EFI partition signature
884 * Returns: 1 if EFI GPT partition type is found.
886 static int pmbr_part_valid(struct partition *part)
888 if (part->sys_ind == EFI_PMBR_OSTYPE_EFI_GPT &&
889 get_unaligned_le32(&part->start_sect) == 1UL) {
897 * is_pmbr_valid(): test Protective MBR for validity
899 * Returns: 1 if PMBR is valid, 0 otherwise.
900 * Validity depends on two things:
901 * 1) MSDOS signature is in the last two bytes of the MBR
902 * 2) One partition of type 0xEE is found, checked by pmbr_part_valid()
904 static int is_pmbr_valid(legacy_mbr * mbr)
908 if (!mbr || le16_to_cpu(mbr->signature) != MSDOS_MBR_SIGNATURE)
911 for (i = 0; i < 4; i++) {
912 if (pmbr_part_valid(&mbr->partition_record[i])) {
920 * is_gpt_valid() - tests one GPT header and PTEs for validity
922 * lba is the logical block address of the GPT header to test
923 * gpt is a GPT header ptr, filled on return.
924 * ptes is a PTEs ptr, filled on return.
926 * Description: returns 1 if valid, 0 on error, 2 if ignored header
927 * If valid, returns pointers to PTEs.
929 static int is_gpt_valid(struct blk_desc *dev_desc, u64 lba,
930 gpt_header *pgpt_head, gpt_entry **pgpt_pte)
932 /* Confirm valid arguments prior to allocation. */
933 if (!dev_desc || !pgpt_head) {
934 printf("%s: Invalid Argument(s)\n", __func__);
938 ALLOC_CACHE_ALIGN_BUFFER_PAD(legacy_mbr, mbr, 1, dev_desc->blksz);
940 /* Read MBR Header from device */
941 if (blk_dread(dev_desc, 0, 1, (ulong *)mbr) != 1) {
942 printf("*** ERROR: Can't read MBR header ***\n");
946 /* Read GPT Header from device */
947 if (blk_dread(dev_desc, (lbaint_t)lba, 1, pgpt_head) != 1) {
948 printf("*** ERROR: Can't read GPT header ***\n");
952 /* Invalid but nothing to yell about. */
953 if (le64_to_cpu(pgpt_head->signature) == GPT_HEADER_CHROMEOS_IGNORE) {
954 debug("ChromeOS 'IGNOREME' GPT header found and ignored\n");
958 if (validate_gpt_header(pgpt_head, (lbaint_t)lba, dev_desc->lba))
961 if (dev_desc->sig_type == SIG_TYPE_NONE) {
962 efi_guid_t empty = {};
963 if (memcmp(&pgpt_head->disk_guid, &empty, sizeof(empty))) {
964 dev_desc->sig_type = SIG_TYPE_GUID;
965 memcpy(&dev_desc->guid_sig, &pgpt_head->disk_guid,
967 } else if (mbr->unique_mbr_signature != 0) {
968 dev_desc->sig_type = SIG_TYPE_MBR;
969 dev_desc->mbr_sig = mbr->unique_mbr_signature;
973 /* Read and allocate Partition Table Entries */
974 *pgpt_pte = alloc_read_gpt_entries(dev_desc, pgpt_head);
975 if (*pgpt_pte == NULL) {
976 printf("GPT: Failed to allocate memory for PTE\n");
980 if (validate_gpt_entries(pgpt_head, *pgpt_pte)) {
985 /* We're done, all's well */
990 * find_valid_gpt() - finds a valid GPT header and PTEs
992 * gpt is a GPT header ptr, filled on return.
993 * ptes is a PTEs ptr, filled on return.
995 * Description: returns 1 if found a valid gpt, 0 on error.
996 * If valid, returns pointers to PTEs.
998 static int find_valid_gpt(struct blk_desc *dev_desc, gpt_header *gpt_head,
999 gpt_entry **pgpt_pte)
1003 r = is_gpt_valid(dev_desc, GPT_PRIMARY_PARTITION_TABLE_LBA, gpt_head,
1008 printf("%s: *** ERROR: Invalid GPT ***\n", __func__);
1010 if (is_gpt_valid(dev_desc, (dev_desc->lba - 1), gpt_head,
1012 printf("%s: *** ERROR: Invalid Backup GPT ***\n",
1017 printf("%s: *** Using Backup GPT ***\n",
1024 * alloc_read_gpt_entries(): reads partition entries from disk
1028 * Description: Returns ptes on success, NULL on error.
1029 * Allocates space for PTEs based on information found in @gpt.
1030 * Notes: remember to free pte when you're done!
1032 static gpt_entry *alloc_read_gpt_entries(struct blk_desc *dev_desc,
1033 gpt_header *pgpt_head)
1035 size_t count = 0, blk_cnt;
1037 gpt_entry *pte = NULL;
1039 if (!dev_desc || !pgpt_head) {
1040 printf("%s: Invalid Argument(s)\n", __func__);
1044 count = le32_to_cpu(pgpt_head->num_partition_entries) *
1045 le32_to_cpu(pgpt_head->sizeof_partition_entry);
1047 debug("%s: count = %u * %u = %lu\n", __func__,
1048 (u32) le32_to_cpu(pgpt_head->num_partition_entries),
1049 (u32) le32_to_cpu(pgpt_head->sizeof_partition_entry),
1052 /* Allocate memory for PTE, remember to FREE */
1054 pte = memalign(ARCH_DMA_MINALIGN,
1055 PAD_TO_BLOCKSIZE(count, dev_desc));
1058 if (count == 0 || pte == NULL) {
1059 printf("%s: ERROR: Can't allocate %#lX bytes for GPT Entries\n",
1060 __func__, (ulong)count);
1064 /* Read GPT Entries from device */
1065 blk = le64_to_cpu(pgpt_head->partition_entry_lba);
1066 blk_cnt = BLOCK_CNT(count, dev_desc);
1067 if (blk_dread(dev_desc, blk, (lbaint_t)blk_cnt, pte) != blk_cnt) {
1068 printf("*** ERROR: Can't read GPT Entries ***\n");
1076 * is_pte_valid(): validates a single Partition Table Entry
1077 * @gpt_entry - Pointer to a single Partition Table Entry
1079 * Description: returns 1 if valid, 0 on error.
1081 static int is_pte_valid(gpt_entry * pte)
1083 efi_guid_t unused_guid;
1086 printf("%s: Invalid Argument(s)\n", __func__);
1090 /* Only one validation for now:
1091 * The GUID Partition Type != Unused Entry (ALL-ZERO)
1093 memset(unused_guid.b, 0, sizeof(unused_guid.b));
1095 if (memcmp(pte->partition_type_guid.b, unused_guid.b,
1096 sizeof(unused_guid.b)) == 0) {
1098 debug("%s: Found an unused PTE GUID at 0x%08X\n", __func__,
1099 (unsigned int)(uintptr_t)pte);
1108 * Add an 'a_' prefix so it comes before 'dos' in the linker list. We need to
1109 * check EFI first, since a DOS partition is often used as a 'protective MBR'
1112 U_BOOT_PART_TYPE(a_efi) = {
1114 .part_type = PART_TYPE_EFI,
1115 .max_entries = GPT_ENTRY_NUMBERS,
1116 .get_info = part_get_info_ptr(part_get_info_efi),
1117 .print = part_print_ptr(part_print_efi),
1118 .test = part_test_efi,