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 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;
32 #ifdef CONFIG_HAVE_BLOCK_DEVICE
34 /* GUID for basic data partitons */
35 #if CONFIG_IS_ENABLED(EFI_PARTITION)
36 static const efi_guid_t partition_basic_data_guid = PARTITION_BASIC_DATA_GUID;
40 * efi_crc32() - EFI version of crc32 function
41 * @buf: buffer to calculate crc32 of
42 * @len - length of buf
44 * Description: Returns EFI-style CRC32 value for @buf
46 static inline u32 efi_crc32(const void *buf, u32 len)
48 return crc32(0, buf, len);
52 * Private function prototypes
55 static int pmbr_part_valid(struct partition *part);
56 static int is_pmbr_valid(legacy_mbr * mbr);
57 static int is_gpt_valid(struct blk_desc *dev_desc, u64 lba,
58 gpt_header *pgpt_head, gpt_entry **pgpt_pte);
59 static gpt_entry *alloc_read_gpt_entries(struct blk_desc *dev_desc,
60 gpt_header *pgpt_head);
61 static int is_pte_valid(gpt_entry * pte);
62 static int find_valid_gpt(struct blk_desc *dev_desc, gpt_header *gpt_head,
63 gpt_entry **pgpt_pte);
65 static char *print_efiname(gpt_entry *pte)
67 static char name[PARTNAME_SZ + 1];
69 for (i = 0; i < PARTNAME_SZ; i++) {
71 c = pte->partition_name[i] & 0xff;
72 c = (c && !isprint(c)) ? '.' : c;
75 name[PARTNAME_SZ] = 0;
79 static const efi_guid_t system_guid = PARTITION_SYSTEM_GUID;
81 static int get_bootable(gpt_entry *p)
85 if (!memcmp(&p->partition_type_guid, &system_guid, sizeof(efi_guid_t)))
86 ret |= PART_EFI_SYSTEM_PARTITION;
87 if (p->attributes.fields.legacy_bios_bootable)
92 static int validate_gpt_header(gpt_header *gpt_h, lbaint_t lba,
95 uint32_t crc32_backup = 0;
98 /* Check the GPT header signature */
99 if (le64_to_cpu(gpt_h->signature) != GPT_HEADER_SIGNATURE_UBOOT) {
100 printf("%s signature is wrong: 0x%llX != 0x%llX\n",
101 "GUID Partition Table Header",
102 le64_to_cpu(gpt_h->signature),
103 GPT_HEADER_SIGNATURE_UBOOT);
107 /* Check the GUID Partition Table CRC */
108 memcpy(&crc32_backup, &gpt_h->header_crc32, sizeof(crc32_backup));
109 memset(&gpt_h->header_crc32, 0, sizeof(gpt_h->header_crc32));
111 calc_crc32 = efi_crc32((const unsigned char *)gpt_h,
112 le32_to_cpu(gpt_h->header_size));
114 memcpy(&gpt_h->header_crc32, &crc32_backup, sizeof(crc32_backup));
116 if (calc_crc32 != le32_to_cpu(crc32_backup)) {
117 printf("%s CRC is wrong: 0x%x != 0x%x\n",
118 "GUID Partition Table Header",
119 le32_to_cpu(crc32_backup), calc_crc32);
124 * Check that the my_lba entry points to the LBA that contains the GPT
126 if (le64_to_cpu(gpt_h->my_lba) != lba) {
127 printf("GPT: my_lba incorrect: %llX != " LBAF "\n",
128 le64_to_cpu(gpt_h->my_lba),
134 * Check that the first_usable_lba and that the last_usable_lba are
137 if (le64_to_cpu(gpt_h->first_usable_lba) > lastlba) {
138 printf("GPT: first_usable_lba incorrect: %llX > " LBAF "\n",
139 le64_to_cpu(gpt_h->first_usable_lba), lastlba);
142 if (le64_to_cpu(gpt_h->last_usable_lba) > lastlba) {
143 printf("GPT: last_usable_lba incorrect: %llX > " LBAF "\n",
144 le64_to_cpu(gpt_h->last_usable_lba), lastlba);
148 debug("GPT: first_usable_lba: %llX last_usable_lba: %llX last lba: "
149 LBAF "\n", le64_to_cpu(gpt_h->first_usable_lba),
150 le64_to_cpu(gpt_h->last_usable_lba), lastlba);
155 static int validate_gpt_entries(gpt_header *gpt_h, gpt_entry *gpt_e)
159 /* Check the GUID Partition Table Entry Array CRC */
160 calc_crc32 = efi_crc32((const unsigned char *)gpt_e,
161 le32_to_cpu(gpt_h->num_partition_entries) *
162 le32_to_cpu(gpt_h->sizeof_partition_entry));
164 if (calc_crc32 != le32_to_cpu(gpt_h->partition_entry_array_crc32)) {
165 printf("%s: 0x%x != 0x%x\n",
166 "GUID Partition Table Entry Array CRC is wrong",
167 le32_to_cpu(gpt_h->partition_entry_array_crc32),
175 static void prepare_backup_gpt_header(gpt_header *gpt_h)
180 /* recalculate the values for the Backup GPT Header */
181 val = le64_to_cpu(gpt_h->my_lba);
182 gpt_h->my_lba = gpt_h->alternate_lba;
183 gpt_h->alternate_lba = cpu_to_le64(val);
184 gpt_h->partition_entry_lba =
185 cpu_to_le64(le64_to_cpu(gpt_h->last_usable_lba) + 1);
186 gpt_h->header_crc32 = 0;
188 calc_crc32 = efi_crc32((const unsigned char *)gpt_h,
189 le32_to_cpu(gpt_h->header_size));
190 gpt_h->header_crc32 = cpu_to_le32(calc_crc32);
193 #if CONFIG_IS_ENABLED(EFI_PARTITION)
195 * Public Functions (include/part.h)
199 * UUID is displayed as 32 hexadecimal digits, in 5 groups,
200 * separated by hyphens, in the form 8-4-4-4-12 for a total of 36 characters
202 int get_disk_guid(struct blk_desc * dev_desc, char *guid)
204 ALLOC_CACHE_ALIGN_BUFFER_PAD(gpt_header, gpt_head, 1, dev_desc->blksz);
205 gpt_entry *gpt_pte = NULL;
206 unsigned char *guid_bin;
208 /* This function validates AND fills in the GPT header and PTE */
209 if (find_valid_gpt(dev_desc, gpt_head, &gpt_pte) != 1)
212 guid_bin = gpt_head->disk_guid.b;
213 uuid_bin_to_str(guid_bin, guid, UUID_STR_FORMAT_GUID);
215 /* Remember to free pte */
220 void part_print_efi(struct blk_desc *dev_desc)
222 ALLOC_CACHE_ALIGN_BUFFER_PAD(gpt_header, gpt_head, 1, dev_desc->blksz);
223 gpt_entry *gpt_pte = NULL;
225 char uuid[UUID_STR_LEN + 1];
226 unsigned char *uuid_bin;
228 /* This function validates AND fills in the GPT header and PTE */
229 if (find_valid_gpt(dev_desc, gpt_head, &gpt_pte) != 1)
232 debug("%s: gpt-entry at %p\n", __func__, gpt_pte);
234 printf("Part\tStart LBA\tEnd LBA\t\tName\n");
235 printf("\tAttributes\n");
236 printf("\tType GUID\n");
237 printf("\tPartition GUID\n");
239 for (i = 0; i < le32_to_cpu(gpt_head->num_partition_entries); i++) {
240 /* Stop at the first non valid PTE */
241 if (!is_pte_valid(&gpt_pte[i]))
244 printf("%3d\t0x%08llx\t0x%08llx\t\"%s\"\n", (i + 1),
245 le64_to_cpu(gpt_pte[i].starting_lba),
246 le64_to_cpu(gpt_pte[i].ending_lba),
247 print_efiname(&gpt_pte[i]));
248 printf("\tattrs:\t0x%016llx\n", gpt_pte[i].attributes.raw);
249 uuid_bin = (unsigned char *)gpt_pte[i].partition_type_guid.b;
250 uuid_bin_to_str(uuid_bin, uuid, UUID_STR_FORMAT_GUID);
251 printf("\ttype:\t%s\n", uuid);
252 if (CONFIG_IS_ENABLED(PARTITION_TYPE_GUID)) {
253 const char *type = uuid_guid_get_str(uuid_bin);
255 printf("\ttype:\t%s\n", type);
257 uuid_bin = (unsigned char *)gpt_pte[i].unique_partition_guid.b;
258 uuid_bin_to_str(uuid_bin, uuid, UUID_STR_FORMAT_GUID);
259 printf("\tguid:\t%s\n", uuid);
262 /* Remember to free pte */
267 int part_get_info_efi(struct blk_desc *dev_desc, int part,
268 struct disk_partition *info)
270 ALLOC_CACHE_ALIGN_BUFFER_PAD(gpt_header, gpt_head, 1, dev_desc->blksz);
271 gpt_entry *gpt_pte = NULL;
273 /* "part" argument must be at least 1 */
275 printf("%s: Invalid Argument(s)\n", __func__);
279 /* This function validates AND fills in the GPT header and PTE */
280 if (find_valid_gpt(dev_desc, gpt_head, &gpt_pte) != 1)
283 if (part > le32_to_cpu(gpt_head->num_partition_entries) ||
284 !is_pte_valid(&gpt_pte[part - 1])) {
285 debug("%s: *** ERROR: Invalid partition number %d ***\n",
291 /* The 'lbaint_t' casting may limit the maximum disk size to 2 TB */
292 info->start = (lbaint_t)le64_to_cpu(gpt_pte[part - 1].starting_lba);
293 /* The ending LBA is inclusive, to calculate size, add 1 to it */
294 info->size = (lbaint_t)le64_to_cpu(gpt_pte[part - 1].ending_lba) + 1
296 info->blksz = dev_desc->blksz;
298 snprintf((char *)info->name, sizeof(info->name), "%s",
299 print_efiname(&gpt_pte[part - 1]));
300 strcpy((char *)info->type, "U-Boot");
301 info->bootable = get_bootable(&gpt_pte[part - 1]);
302 #if CONFIG_IS_ENABLED(PARTITION_UUIDS)
303 uuid_bin_to_str(gpt_pte[part - 1].unique_partition_guid.b, info->uuid,
304 UUID_STR_FORMAT_GUID);
306 #ifdef CONFIG_PARTITION_TYPE_GUID
307 uuid_bin_to_str(gpt_pte[part - 1].partition_type_guid.b,
308 info->type_guid, UUID_STR_FORMAT_GUID);
311 debug("%s: start 0x" LBAF ", size 0x" LBAF ", name %s\n", __func__,
312 info->start, info->size, info->name);
314 /* Remember to free pte */
319 static int part_test_efi(struct blk_desc *dev_desc)
321 ALLOC_CACHE_ALIGN_BUFFER_PAD(legacy_mbr, legacymbr, 1, dev_desc->blksz);
323 /* Read legacy MBR from block 0 and validate it */
324 if ((blk_dread(dev_desc, 0, 1, (ulong *)legacymbr) != 1)
325 || (is_pmbr_valid(legacymbr) != 1)) {
332 * set_protective_mbr(): Set the EFI protective MBR
333 * @param dev_desc - block device descriptor
335 * @return - zero on success, otherwise error
337 static int set_protective_mbr(struct blk_desc *dev_desc)
339 /* Setup the Protective MBR */
340 ALLOC_CACHE_ALIGN_BUFFER_PAD(legacy_mbr, p_mbr, 1, dev_desc->blksz);
342 printf("%s: calloc failed!\n", __func__);
346 /* Read MBR to backup boot code if it exists */
347 if (blk_dread(dev_desc, 0, 1, p_mbr) != 1) {
348 pr_err("** Can't read from device %d **\n", dev_desc->devnum);
352 /* Clear all data in MBR except of backed up boot code */
353 memset((char *)p_mbr + MSDOS_MBR_BOOT_CODE_SIZE, 0, sizeof(*p_mbr) -
354 MSDOS_MBR_BOOT_CODE_SIZE);
356 /* Append signature */
357 p_mbr->signature = MSDOS_MBR_SIGNATURE;
358 p_mbr->partition_record[0].sys_ind = EFI_PMBR_OSTYPE_EFI_GPT;
359 p_mbr->partition_record[0].start_sect = 1;
360 p_mbr->partition_record[0].nr_sects = (u32) dev_desc->lba - 1;
362 /* Write MBR sector to the MMC device */
363 if (blk_dwrite(dev_desc, 0, 1, p_mbr) != 1) {
364 printf("** Can't write to device %d **\n",
372 int write_gpt_table(struct blk_desc *dev_desc,
373 gpt_header *gpt_h, gpt_entry *gpt_e)
375 const int pte_blk_cnt = BLOCK_CNT((gpt_h->num_partition_entries
376 * sizeof(gpt_entry)), dev_desc);
379 debug("max lba: %x\n", (u32) dev_desc->lba);
380 /* Setup the Protective MBR */
381 if (set_protective_mbr(dev_desc) < 0)
384 /* Generate CRC for the Primary GPT Header */
385 calc_crc32 = efi_crc32((const unsigned char *)gpt_e,
386 le32_to_cpu(gpt_h->num_partition_entries) *
387 le32_to_cpu(gpt_h->sizeof_partition_entry));
388 gpt_h->partition_entry_array_crc32 = cpu_to_le32(calc_crc32);
390 calc_crc32 = efi_crc32((const unsigned char *)gpt_h,
391 le32_to_cpu(gpt_h->header_size));
392 gpt_h->header_crc32 = cpu_to_le32(calc_crc32);
394 /* Write the First GPT to the block right after the Legacy MBR */
395 if (blk_dwrite(dev_desc, 1, 1, gpt_h) != 1)
398 if (blk_dwrite(dev_desc, le64_to_cpu(gpt_h->partition_entry_lba),
399 pte_blk_cnt, gpt_e) != pte_blk_cnt)
402 prepare_backup_gpt_header(gpt_h);
404 if (blk_dwrite(dev_desc, (lbaint_t)le64_to_cpu(gpt_h->last_usable_lba)
405 + 1, pte_blk_cnt, gpt_e) != pte_blk_cnt)
408 if (blk_dwrite(dev_desc, (lbaint_t)le64_to_cpu(gpt_h->my_lba), 1,
412 debug("GPT successfully written to block device!\n");
416 printf("** Can't write to device %d **\n", dev_desc->devnum);
420 int gpt_fill_pte(struct blk_desc *dev_desc,
421 gpt_header *gpt_h, gpt_entry *gpt_e,
422 struct disk_partition *partitions, int parts)
424 lbaint_t offset = (lbaint_t)le64_to_cpu(gpt_h->first_usable_lba);
425 lbaint_t last_usable_lba = (lbaint_t)
426 le64_to_cpu(gpt_h->last_usable_lba);
428 size_t efiname_len, dosname_len;
429 #if CONFIG_IS_ENABLED(PARTITION_UUIDS)
431 unsigned char *bin_uuid;
433 #ifdef CONFIG_PARTITION_TYPE_GUID
435 unsigned char *bin_type_guid;
437 size_t hdr_start = gpt_h->my_lba;
438 size_t hdr_end = hdr_start + 1;
440 size_t pte_start = gpt_h->partition_entry_lba;
441 size_t pte_end = pte_start +
442 gpt_h->num_partition_entries * gpt_h->sizeof_partition_entry /
445 for (i = 0; i < parts; i++) {
446 /* partition starting lba */
447 lbaint_t start = partitions[i].start;
448 lbaint_t size = partitions[i].size;
451 offset = start + size;
458 * If our partition overlaps with either the GPT
459 * header, or the partition entry, reject it.
461 if (((start < hdr_end && hdr_start < (start + size)) ||
462 (start < pte_end && pte_start < (start + size)))) {
463 printf("Partition overlap\n");
467 gpt_e[i].starting_lba = cpu_to_le64(start);
469 if (offset > (last_usable_lba + 1)) {
470 printf("Partitions layout exceds disk size\n");
473 /* partition ending lba */
474 if ((i == parts - 1) && (size == 0))
475 /* extend the last partition to maximuim */
476 gpt_e[i].ending_lba = gpt_h->last_usable_lba;
478 gpt_e[i].ending_lba = cpu_to_le64(offset - 1);
480 #ifdef CONFIG_PARTITION_TYPE_GUID
481 str_type_guid = partitions[i].type_guid;
482 bin_type_guid = gpt_e[i].partition_type_guid.b;
483 if (strlen(str_type_guid)) {
484 if (uuid_str_to_bin(str_type_guid, bin_type_guid,
485 UUID_STR_FORMAT_GUID)) {
486 printf("Partition no. %d: invalid type guid: %s\n",
491 /* default partition type GUID */
492 memcpy(bin_type_guid,
493 &partition_basic_data_guid, 16);
496 /* partition type GUID */
497 memcpy(gpt_e[i].partition_type_guid.b,
498 &partition_basic_data_guid, 16);
501 #if CONFIG_IS_ENABLED(PARTITION_UUIDS)
502 str_uuid = partitions[i].uuid;
503 bin_uuid = gpt_e[i].unique_partition_guid.b;
505 if (uuid_str_to_bin(str_uuid, bin_uuid, UUID_STR_FORMAT_GUID)) {
506 printf("Partition no. %d: invalid guid: %s\n",
512 /* partition attributes */
513 memset(&gpt_e[i].attributes, 0,
514 sizeof(gpt_entry_attributes));
516 if (partitions[i].bootable & PART_BOOTABLE)
517 gpt_e[i].attributes.fields.legacy_bios_bootable = 1;
520 efiname_len = sizeof(gpt_e[i].partition_name)
521 / sizeof(efi_char16_t);
522 dosname_len = sizeof(partitions[i].name);
524 memset(gpt_e[i].partition_name, 0,
525 sizeof(gpt_e[i].partition_name));
527 for (k = 0; k < min(dosname_len, efiname_len); k++)
528 gpt_e[i].partition_name[k] =
529 (efi_char16_t)(partitions[i].name[k]);
531 debug("%s: name: %s offset[%d]: 0x" LBAF
532 " size[%d]: 0x" LBAF "\n",
533 __func__, partitions[i].name, i,
540 static uint32_t partition_entries_offset(struct blk_desc *dev_desc)
542 uint32_t offset_blks = 2;
543 uint32_t __maybe_unused offset_bytes;
544 int __maybe_unused config_offset;
546 #if defined(CONFIG_EFI_PARTITION_ENTRIES_OFF)
548 * Some architectures require their SPL loader at a fixed
549 * address within the first 16KB of the disk. To avoid an
550 * overlap with the partition entries of the EFI partition
551 * table, the first safe offset (in bytes, from the start of
552 * the disk) for the entries can be set in
553 * CONFIG_EFI_PARTITION_ENTRIES_OFF.
556 PAD_TO_BLOCKSIZE(CONFIG_EFI_PARTITION_ENTRIES_OFF, dev_desc);
557 offset_blks = offset_bytes / dev_desc->blksz;
560 #if defined(CONFIG_OF_CONTROL)
562 * Allow the offset of the first partition entires (in bytes
563 * from the start of the device) to be specified as a property
564 * of the device tree '/config' node.
566 config_offset = fdtdec_get_config_int(gd->fdt_blob,
567 "u-boot,efi-partition-entries-offset",
569 if (config_offset != -EINVAL) {
570 offset_bytes = PAD_TO_BLOCKSIZE(config_offset, dev_desc);
571 offset_blks = offset_bytes / dev_desc->blksz;
575 debug("efi: partition entries offset (in blocks): %d\n", offset_blks);
578 * The earliest LBA this can be at is LBA#2 (i.e. right behind
579 * the (protective) MBR and the GPT header.
587 int gpt_fill_header(struct blk_desc *dev_desc, gpt_header *gpt_h,
588 char *str_guid, int parts_count)
590 gpt_h->signature = cpu_to_le64(GPT_HEADER_SIGNATURE_UBOOT);
591 gpt_h->revision = cpu_to_le32(GPT_HEADER_REVISION_V1);
592 gpt_h->header_size = cpu_to_le32(sizeof(gpt_header));
593 gpt_h->my_lba = cpu_to_le64(1);
594 gpt_h->alternate_lba = cpu_to_le64(dev_desc->lba - 1);
595 gpt_h->last_usable_lba = cpu_to_le64(dev_desc->lba - 34);
596 gpt_h->partition_entry_lba =
597 cpu_to_le64(partition_entries_offset(dev_desc));
598 gpt_h->first_usable_lba =
599 cpu_to_le64(le64_to_cpu(gpt_h->partition_entry_lba) + 32);
600 gpt_h->num_partition_entries = cpu_to_le32(GPT_ENTRY_NUMBERS);
601 gpt_h->sizeof_partition_entry = cpu_to_le32(sizeof(gpt_entry));
602 gpt_h->header_crc32 = 0;
603 gpt_h->partition_entry_array_crc32 = 0;
605 if (uuid_str_to_bin(str_guid, gpt_h->disk_guid.b, UUID_STR_FORMAT_GUID))
611 int gpt_restore(struct blk_desc *dev_desc, char *str_disk_guid,
612 struct disk_partition *partitions, int parts_count)
618 size = PAD_TO_BLOCKSIZE(sizeof(gpt_header), dev_desc);
619 gpt_h = malloc_cache_aligned(size);
621 printf("%s: calloc failed!\n", __func__);
624 memset(gpt_h, 0, size);
626 size = PAD_TO_BLOCKSIZE(GPT_ENTRY_NUMBERS * sizeof(gpt_entry),
628 gpt_e = malloc_cache_aligned(size);
630 printf("%s: calloc failed!\n", __func__);
634 memset(gpt_e, 0, size);
636 /* Generate Primary GPT header (LBA1) */
637 ret = gpt_fill_header(dev_desc, gpt_h, str_disk_guid, parts_count);
641 /* Generate partition entries */
642 ret = gpt_fill_pte(dev_desc, gpt_h, gpt_e, partitions, parts_count);
646 /* Write GPT partition table */
647 ret = write_gpt_table(dev_desc, gpt_h, gpt_e);
656 * gpt_convert_efi_name_to_char() - convert u16 string to char string
658 * TODO: this conversion only supports ANSI characters
661 * @es: u16 string to be converted
662 * @n: size of target buffer
664 static void gpt_convert_efi_name_to_char(char *s, void *es, int n)
671 for (i = 0, j = 0; j < n; i += 2, j++) {
678 int gpt_verify_headers(struct blk_desc *dev_desc, gpt_header *gpt_head,
682 * This function validates AND
683 * fills in the GPT header and PTE
685 if (is_gpt_valid(dev_desc,
686 GPT_PRIMARY_PARTITION_TABLE_LBA,
687 gpt_head, gpt_pte) != 1) {
688 printf("%s: *** ERROR: Invalid GPT ***\n",
693 /* Free pte before allocating again */
697 * Check that the alternate_lba entry points to the last LBA
699 if (le64_to_cpu(gpt_head->alternate_lba) != (dev_desc->lba - 1)) {
700 printf("%s: *** ERROR: Misplaced Backup GPT ***\n",
705 if (is_gpt_valid(dev_desc, (dev_desc->lba - 1),
706 gpt_head, gpt_pte) != 1) {
707 printf("%s: *** ERROR: Invalid Backup GPT ***\n",
715 int gpt_verify_partitions(struct blk_desc *dev_desc,
716 struct disk_partition *partitions, int parts,
717 gpt_header *gpt_head, gpt_entry **gpt_pte)
719 char efi_str[PARTNAME_SZ + 1];
724 ret = gpt_verify_headers(dev_desc, gpt_head, gpt_pte);
730 for (i = 0; i < parts; i++) {
731 if (i == gpt_head->num_partition_entries) {
732 pr_err("More partitions than allowed!\n");
736 /* Check if GPT and ENV partition names match */
737 gpt_convert_efi_name_to_char(efi_str, gpt_e[i].partition_name,
740 debug("%s: part: %2d name - GPT: %16s, ENV: %16s ",
741 __func__, i, efi_str, partitions[i].name);
743 if (strncmp(efi_str, (char *)partitions[i].name,
744 sizeof(partitions->name))) {
745 pr_err("Partition name: %s does not match %s!\n",
746 efi_str, (char *)partitions[i].name);
750 /* Check if GPT and ENV sizes match */
751 gpt_part_size = le64_to_cpu(gpt_e[i].ending_lba) -
752 le64_to_cpu(gpt_e[i].starting_lba) + 1;
753 debug("size(LBA) - GPT: %8llu, ENV: %8llu ",
754 (unsigned long long)gpt_part_size,
755 (unsigned long long)partitions[i].size);
757 if (le64_to_cpu(gpt_part_size) != partitions[i].size) {
758 /* We do not check the extend partition size */
759 if ((i == parts - 1) && (partitions[i].size == 0))
762 pr_err("Partition %s size: %llu does not match %llu!\n",
763 efi_str, (unsigned long long)gpt_part_size,
764 (unsigned long long)partitions[i].size);
769 * Start address is optional - check only if provided
770 * in '$partition' variable
772 if (!partitions[i].start) {
777 /* Check if GPT and ENV start LBAs match */
778 debug("start LBA - GPT: %8llu, ENV: %8llu\n",
779 le64_to_cpu(gpt_e[i].starting_lba),
780 (unsigned long long)partitions[i].start);
782 if (le64_to_cpu(gpt_e[i].starting_lba) != partitions[i].start) {
783 pr_err("Partition %s start: %llu does not match %llu!\n",
784 efi_str, le64_to_cpu(gpt_e[i].starting_lba),
785 (unsigned long long)partitions[i].start);
793 int is_valid_gpt_buf(struct blk_desc *dev_desc, void *buf)
798 /* determine start of GPT Header in the buffer */
799 gpt_h = buf + (GPT_PRIMARY_PARTITION_TABLE_LBA *
801 if (validate_gpt_header(gpt_h, GPT_PRIMARY_PARTITION_TABLE_LBA,
805 /* determine start of GPT Entries in the buffer */
806 gpt_e = buf + (le64_to_cpu(gpt_h->partition_entry_lba) *
808 if (validate_gpt_entries(gpt_h, gpt_e))
814 int write_mbr_and_gpt_partitions(struct blk_desc *dev_desc, void *buf)
822 if (is_valid_gpt_buf(dev_desc, buf))
825 /* determine start of GPT Header in the buffer */
826 gpt_h = buf + (GPT_PRIMARY_PARTITION_TABLE_LBA *
829 /* determine start of GPT Entries in the buffer */
830 gpt_e = buf + (le64_to_cpu(gpt_h->partition_entry_lba) *
832 gpt_e_blk_cnt = BLOCK_CNT((le32_to_cpu(gpt_h->num_partition_entries) *
833 le32_to_cpu(gpt_h->sizeof_partition_entry)),
837 lba = 0; /* MBR is always at 0 */
838 cnt = 1; /* MBR (1 block) */
839 if (blk_dwrite(dev_desc, lba, cnt, buf) != cnt) {
840 printf("%s: failed writing '%s' (%d blks at 0x" LBAF ")\n",
841 __func__, "MBR", cnt, lba);
845 /* write Primary GPT */
846 lba = GPT_PRIMARY_PARTITION_TABLE_LBA;
847 cnt = 1; /* GPT Header (1 block) */
848 if (blk_dwrite(dev_desc, lba, cnt, gpt_h) != cnt) {
849 printf("%s: failed writing '%s' (%d blks at 0x" LBAF ")\n",
850 __func__, "Primary GPT Header", cnt, lba);
854 lba = le64_to_cpu(gpt_h->partition_entry_lba);
856 if (blk_dwrite(dev_desc, lba, cnt, gpt_e) != cnt) {
857 printf("%s: failed writing '%s' (%d blks at 0x" LBAF ")\n",
858 __func__, "Primary GPT Entries", cnt, lba);
862 prepare_backup_gpt_header(gpt_h);
864 /* write Backup GPT */
865 lba = le64_to_cpu(gpt_h->partition_entry_lba);
867 if (blk_dwrite(dev_desc, lba, cnt, gpt_e) != cnt) {
868 printf("%s: failed writing '%s' (%d blks at 0x" LBAF ")\n",
869 __func__, "Backup GPT Entries", cnt, lba);
873 lba = le64_to_cpu(gpt_h->my_lba);
874 cnt = 1; /* GPT Header (1 block) */
875 if (blk_dwrite(dev_desc, lba, cnt, gpt_h) != cnt) {
876 printf("%s: failed writing '%s' (%d blks at 0x" LBAF ")\n",
877 __func__, "Backup GPT Header", cnt, lba);
881 /* Update the partition table entries*/
892 * pmbr_part_valid(): Check for EFI partition signature
894 * Returns: 1 if EFI GPT partition type is found.
896 static int pmbr_part_valid(struct partition *part)
898 if (part->sys_ind == EFI_PMBR_OSTYPE_EFI_GPT &&
899 get_unaligned_le32(&part->start_sect) == 1UL) {
907 * is_pmbr_valid(): test Protective MBR for validity
909 * Returns: 1 if PMBR is valid, 0 otherwise.
910 * Validity depends on two things:
911 * 1) MSDOS signature is in the last two bytes of the MBR
912 * 2) One partition of type 0xEE is found, checked by pmbr_part_valid()
914 static int is_pmbr_valid(legacy_mbr * mbr)
918 if (!mbr || le16_to_cpu(mbr->signature) != MSDOS_MBR_SIGNATURE)
921 for (i = 0; i < 4; i++) {
922 if (pmbr_part_valid(&mbr->partition_record[i])) {
930 * is_gpt_valid() - tests one GPT header and PTEs for validity
932 * lba is the logical block address of the GPT header to test
933 * gpt is a GPT header ptr, filled on return.
934 * ptes is a PTEs ptr, filled on return.
936 * Description: returns 1 if valid, 0 on error, 2 if ignored header
937 * If valid, returns pointers to PTEs.
939 static int is_gpt_valid(struct blk_desc *dev_desc, u64 lba,
940 gpt_header *pgpt_head, gpt_entry **pgpt_pte)
942 /* Confirm valid arguments prior to allocation. */
943 if (!dev_desc || !pgpt_head) {
944 printf("%s: Invalid Argument(s)\n", __func__);
948 ALLOC_CACHE_ALIGN_BUFFER_PAD(legacy_mbr, mbr, 1, dev_desc->blksz);
950 /* Read MBR Header from device */
951 if (blk_dread(dev_desc, 0, 1, (ulong *)mbr) != 1) {
952 printf("*** ERROR: Can't read MBR header ***\n");
956 /* Read GPT Header from device */
957 if (blk_dread(dev_desc, (lbaint_t)lba, 1, pgpt_head) != 1) {
958 printf("*** ERROR: Can't read GPT header ***\n");
962 /* Invalid but nothing to yell about. */
963 if (le64_to_cpu(pgpt_head->signature) == GPT_HEADER_CHROMEOS_IGNORE) {
964 debug("ChromeOS 'IGNOREME' GPT header found and ignored\n");
968 if (validate_gpt_header(pgpt_head, (lbaint_t)lba, dev_desc->lba))
971 if (dev_desc->sig_type == SIG_TYPE_NONE) {
972 efi_guid_t empty = {};
973 if (memcmp(&pgpt_head->disk_guid, &empty, sizeof(empty))) {
974 dev_desc->sig_type = SIG_TYPE_GUID;
975 memcpy(&dev_desc->guid_sig, &pgpt_head->disk_guid,
977 } else if (mbr->unique_mbr_signature != 0) {
978 dev_desc->sig_type = SIG_TYPE_MBR;
979 dev_desc->mbr_sig = mbr->unique_mbr_signature;
983 /* Read and allocate Partition Table Entries */
984 *pgpt_pte = alloc_read_gpt_entries(dev_desc, pgpt_head);
985 if (*pgpt_pte == NULL) {
986 printf("GPT: Failed to allocate memory for PTE\n");
990 if (validate_gpt_entries(pgpt_head, *pgpt_pte)) {
995 /* We're done, all's well */
1000 * find_valid_gpt() - finds a valid GPT header and PTEs
1002 * gpt is a GPT header ptr, filled on return.
1003 * ptes is a PTEs ptr, filled on return.
1005 * Description: returns 1 if found a valid gpt, 0 on error.
1006 * If valid, returns pointers to PTEs.
1008 static int find_valid_gpt(struct blk_desc *dev_desc, gpt_header *gpt_head,
1009 gpt_entry **pgpt_pte)
1013 r = is_gpt_valid(dev_desc, GPT_PRIMARY_PARTITION_TABLE_LBA, gpt_head,
1018 printf("%s: *** ERROR: Invalid GPT ***\n", __func__);
1020 if (is_gpt_valid(dev_desc, (dev_desc->lba - 1), gpt_head,
1022 printf("%s: *** ERROR: Invalid Backup GPT ***\n",
1027 printf("%s: *** Using Backup GPT ***\n",
1034 * alloc_read_gpt_entries(): reads partition entries from disk
1038 * Description: Returns ptes on success, NULL on error.
1039 * Allocates space for PTEs based on information found in @gpt.
1040 * Notes: remember to free pte when you're done!
1042 static gpt_entry *alloc_read_gpt_entries(struct blk_desc *dev_desc,
1043 gpt_header *pgpt_head)
1045 size_t count = 0, blk_cnt;
1047 gpt_entry *pte = NULL;
1049 if (!dev_desc || !pgpt_head) {
1050 printf("%s: Invalid Argument(s)\n", __func__);
1054 count = le32_to_cpu(pgpt_head->num_partition_entries) *
1055 le32_to_cpu(pgpt_head->sizeof_partition_entry);
1057 debug("%s: count = %u * %u = %lu\n", __func__,
1058 (u32) le32_to_cpu(pgpt_head->num_partition_entries),
1059 (u32) le32_to_cpu(pgpt_head->sizeof_partition_entry),
1062 /* Allocate memory for PTE, remember to FREE */
1064 pte = memalign(ARCH_DMA_MINALIGN,
1065 PAD_TO_BLOCKSIZE(count, dev_desc));
1068 if (count == 0 || pte == NULL) {
1069 printf("%s: ERROR: Can't allocate %#lX bytes for GPT Entries\n",
1070 __func__, (ulong)count);
1074 /* Read GPT Entries from device */
1075 blk = le64_to_cpu(pgpt_head->partition_entry_lba);
1076 blk_cnt = BLOCK_CNT(count, dev_desc);
1077 if (blk_dread(dev_desc, blk, (lbaint_t)blk_cnt, pte) != blk_cnt) {
1078 printf("*** ERROR: Can't read GPT Entries ***\n");
1086 * is_pte_valid(): validates a single Partition Table Entry
1087 * @gpt_entry - Pointer to a single Partition Table Entry
1089 * Description: returns 1 if valid, 0 on error.
1091 static int is_pte_valid(gpt_entry * pte)
1093 efi_guid_t unused_guid;
1096 printf("%s: Invalid Argument(s)\n", __func__);
1100 /* Only one validation for now:
1101 * The GUID Partition Type != Unused Entry (ALL-ZERO)
1103 memset(unused_guid.b, 0, sizeof(unused_guid.b));
1105 if (memcmp(pte->partition_type_guid.b, unused_guid.b,
1106 sizeof(unused_guid.b)) == 0) {
1108 debug("%s: Found an unused PTE GUID at 0x%08X\n", __func__,
1109 (unsigned int)(uintptr_t)pte);
1118 * Add an 'a_' prefix so it comes before 'dos' in the linker list. We need to
1119 * check EFI first, since a DOS partition is often used as a 'protective MBR'
1122 U_BOOT_PART_TYPE(a_efi) = {
1124 .part_type = PART_TYPE_EFI,
1125 .max_entries = GPT_ENTRY_NUMBERS,
1126 .get_info = part_get_info_ptr(part_get_info_efi),
1127 .print = part_print_ptr(part_print_efi),
1128 .test = part_test_efi,
1130 #endif /* CONFIG_HAVE_BLOCK_DEVICE */