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 <dm/ofnode.h>
27 #include <linux/compiler.h>
28 #include <linux/ctype.h>
29 #include <u-boot/crc.h>
31 /* GUID for basic data partitons */
32 #if CONFIG_IS_ENABLED(EFI_PARTITION)
33 static const efi_guid_t partition_basic_data_guid = PARTITION_BASIC_DATA_GUID;
37 * efi_crc32() - EFI version of crc32 function
38 * @buf: buffer to calculate crc32 of
39 * @len - length of buf
41 * Description: Returns EFI-style CRC32 value for @buf
43 static inline u32 efi_crc32(const void *buf, u32 len)
45 return crc32(0, buf, len);
49 * Private function prototypes
52 static int pmbr_part_valid(struct partition *part);
53 static int is_pmbr_valid(legacy_mbr * mbr);
54 static int is_gpt_valid(struct blk_desc *dev_desc, u64 lba,
55 gpt_header *pgpt_head, gpt_entry **pgpt_pte);
56 static gpt_entry *alloc_read_gpt_entries(struct blk_desc *dev_desc,
57 gpt_header *pgpt_head);
58 static int is_pte_valid(gpt_entry * pte);
59 static int find_valid_gpt(struct blk_desc *dev_desc, gpt_header *gpt_head,
60 gpt_entry **pgpt_pte);
62 static char *print_efiname(gpt_entry *pte)
64 static char name[PARTNAME_SZ + 1];
66 for (i = 0; i < PARTNAME_SZ; i++) {
68 c = pte->partition_name[i] & 0xff;
69 c = (c && !isprint(c)) ? '.' : c;
72 name[PARTNAME_SZ] = 0;
76 static const efi_guid_t system_guid = PARTITION_SYSTEM_GUID;
78 static int get_bootable(gpt_entry *p)
82 if (!memcmp(&p->partition_type_guid, &system_guid, sizeof(efi_guid_t)))
83 ret |= PART_EFI_SYSTEM_PARTITION;
84 if (p->attributes.fields.legacy_bios_bootable)
89 static int validate_gpt_header(gpt_header *gpt_h, lbaint_t lba,
92 uint32_t crc32_backup = 0;
95 /* Check the GPT header signature */
96 if (le64_to_cpu(gpt_h->signature) != GPT_HEADER_SIGNATURE_UBOOT) {
97 printf("%s signature is wrong: 0x%llX != 0x%llX\n",
98 "GUID Partition Table Header",
99 le64_to_cpu(gpt_h->signature),
100 GPT_HEADER_SIGNATURE_UBOOT);
104 /* Check the GUID Partition Table CRC */
105 memcpy(&crc32_backup, &gpt_h->header_crc32, sizeof(crc32_backup));
106 memset(&gpt_h->header_crc32, 0, sizeof(gpt_h->header_crc32));
108 calc_crc32 = efi_crc32((const unsigned char *)gpt_h,
109 le32_to_cpu(gpt_h->header_size));
111 memcpy(&gpt_h->header_crc32, &crc32_backup, sizeof(crc32_backup));
113 if (calc_crc32 != le32_to_cpu(crc32_backup)) {
114 printf("%s CRC is wrong: 0x%x != 0x%x\n",
115 "GUID Partition Table Header",
116 le32_to_cpu(crc32_backup), calc_crc32);
121 * Check that the my_lba entry points to the LBA that contains the GPT
123 if (le64_to_cpu(gpt_h->my_lba) != lba) {
124 printf("GPT: my_lba incorrect: %llX != " LBAF "\n",
125 le64_to_cpu(gpt_h->my_lba),
131 * Check that the first_usable_lba and that the last_usable_lba are
134 if (le64_to_cpu(gpt_h->first_usable_lba) > lastlba) {
135 printf("GPT: first_usable_lba incorrect: %llX > " LBAF "\n",
136 le64_to_cpu(gpt_h->first_usable_lba), lastlba);
139 if (le64_to_cpu(gpt_h->last_usable_lba) > lastlba) {
140 printf("GPT: last_usable_lba incorrect: %llX > " LBAF "\n",
141 le64_to_cpu(gpt_h->last_usable_lba), lastlba);
145 debug("GPT: first_usable_lba: %llX last_usable_lba: %llX last lba: "
146 LBAF "\n", le64_to_cpu(gpt_h->first_usable_lba),
147 le64_to_cpu(gpt_h->last_usable_lba), lastlba);
152 static int validate_gpt_entries(gpt_header *gpt_h, gpt_entry *gpt_e)
156 /* Check the GUID Partition Table Entry Array CRC */
157 calc_crc32 = efi_crc32((const unsigned char *)gpt_e,
158 le32_to_cpu(gpt_h->num_partition_entries) *
159 le32_to_cpu(gpt_h->sizeof_partition_entry));
161 if (calc_crc32 != le32_to_cpu(gpt_h->partition_entry_array_crc32)) {
162 printf("%s: 0x%x != 0x%x\n",
163 "GUID Partition Table Entry Array CRC is wrong",
164 le32_to_cpu(gpt_h->partition_entry_array_crc32),
172 static void prepare_backup_gpt_header(gpt_header *gpt_h)
177 /* recalculate the values for the Backup GPT Header */
178 val = le64_to_cpu(gpt_h->my_lba);
179 gpt_h->my_lba = gpt_h->alternate_lba;
180 gpt_h->alternate_lba = cpu_to_le64(val);
181 gpt_h->partition_entry_lba =
182 cpu_to_le64(le64_to_cpu(gpt_h->last_usable_lba) + 1);
183 gpt_h->header_crc32 = 0;
185 calc_crc32 = efi_crc32((const unsigned char *)gpt_h,
186 le32_to_cpu(gpt_h->header_size));
187 gpt_h->header_crc32 = cpu_to_le32(calc_crc32);
190 #if CONFIG_IS_ENABLED(EFI_PARTITION)
192 * Public Functions (include/part.h)
196 * UUID is displayed as 32 hexadecimal digits, in 5 groups,
197 * separated by hyphens, in the form 8-4-4-4-12 for a total of 36 characters
199 int get_disk_guid(struct blk_desc * dev_desc, char *guid)
201 ALLOC_CACHE_ALIGN_BUFFER_PAD(gpt_header, gpt_head, 1, dev_desc->blksz);
202 gpt_entry *gpt_pte = NULL;
203 unsigned char *guid_bin;
205 /* This function validates AND fills in the GPT header and PTE */
206 if (find_valid_gpt(dev_desc, gpt_head, &gpt_pte) != 1)
209 guid_bin = gpt_head->disk_guid.b;
210 uuid_bin_to_str(guid_bin, guid, UUID_STR_FORMAT_GUID);
212 /* Remember to free pte */
217 void part_print_efi(struct blk_desc *dev_desc)
219 ALLOC_CACHE_ALIGN_BUFFER_PAD(gpt_header, gpt_head, 1, dev_desc->blksz);
220 gpt_entry *gpt_pte = NULL;
224 /* This function validates AND fills in the GPT header and PTE */
225 if (find_valid_gpt(dev_desc, gpt_head, &gpt_pte) != 1)
228 debug("%s: gpt-entry at %p\n", __func__, gpt_pte);
230 printf("Part\tStart LBA\tEnd LBA\t\tName\n");
231 printf("\tAttributes\n");
232 printf("\tType GUID\n");
233 printf("\tPartition GUID\n");
235 for (i = 0; i < le32_to_cpu(gpt_head->num_partition_entries); i++) {
236 /* Skip invalid PTE */
237 if (!is_pte_valid(&gpt_pte[i]))
240 printf("%3d\t0x%08llx\t0x%08llx\t\"%s\"\n", (i + 1),
241 le64_to_cpu(gpt_pte[i].starting_lba),
242 le64_to_cpu(gpt_pte[i].ending_lba),
243 print_efiname(&gpt_pte[i]));
244 printf("\tattrs:\t0x%016llx\n", gpt_pte[i].attributes.raw);
245 uuid = (unsigned char *)gpt_pte[i].partition_type_guid.b;
246 if (CONFIG_IS_ENABLED(PARTITION_TYPE_GUID))
247 printf("\ttype:\t%pUl\n\t\t(%pUs)\n", uuid, uuid);
249 printf("\ttype:\t%pUl\n", uuid);
250 uuid = (unsigned char *)gpt_pte[i].unique_partition_guid.b;
251 printf("\tguid:\t%pUl\n", uuid);
254 /* Remember to free pte */
259 int part_get_info_efi(struct blk_desc *dev_desc, int part,
260 struct disk_partition *info)
262 ALLOC_CACHE_ALIGN_BUFFER_PAD(gpt_header, gpt_head, 1, dev_desc->blksz);
263 gpt_entry *gpt_pte = NULL;
265 /* "part" argument must be at least 1 */
267 log_debug("Invalid Argument(s)\n");
271 /* This function validates AND fills in the GPT header and PTE */
272 if (find_valid_gpt(dev_desc, gpt_head, &gpt_pte) != 1)
275 if (part > le32_to_cpu(gpt_head->num_partition_entries) ||
276 !is_pte_valid(&gpt_pte[part - 1])) {
277 log_debug("*** ERROR: Invalid partition number %d ***\n", part);
282 /* The 'lbaint_t' casting may limit the maximum disk size to 2 TB */
283 info->start = (lbaint_t)le64_to_cpu(gpt_pte[part - 1].starting_lba);
284 /* The ending LBA is inclusive, to calculate size, add 1 to it */
285 info->size = (lbaint_t)le64_to_cpu(gpt_pte[part - 1].ending_lba) + 1
287 info->blksz = dev_desc->blksz;
289 snprintf((char *)info->name, sizeof(info->name), "%s",
290 print_efiname(&gpt_pte[part - 1]));
291 strcpy((char *)info->type, "U-Boot");
292 info->bootable = get_bootable(&gpt_pte[part - 1]);
293 #if CONFIG_IS_ENABLED(PARTITION_UUIDS)
294 uuid_bin_to_str(gpt_pte[part - 1].unique_partition_guid.b, info->uuid,
295 UUID_STR_FORMAT_GUID);
297 #ifdef CONFIG_PARTITION_TYPE_GUID
298 uuid_bin_to_str(gpt_pte[part - 1].partition_type_guid.b,
299 info->type_guid, UUID_STR_FORMAT_GUID);
302 log_debug("start 0x" LBAF ", size 0x" LBAF ", name %s\n", info->start,
303 info->size, info->name);
305 /* Remember to free pte */
310 static int part_test_efi(struct blk_desc *dev_desc)
312 ALLOC_CACHE_ALIGN_BUFFER_PAD(legacy_mbr, legacymbr, 1, dev_desc->blksz);
314 /* Read legacy MBR from block 0 and validate it */
315 if ((blk_dread(dev_desc, 0, 1, (ulong *)legacymbr) != 1)
316 || (is_pmbr_valid(legacymbr) != 1)) {
323 * set_protective_mbr(): Set the EFI protective MBR
324 * @param dev_desc - block device descriptor
326 * Return: - zero on success, otherwise error
328 static int set_protective_mbr(struct blk_desc *dev_desc)
330 /* Setup the Protective MBR */
331 ALLOC_CACHE_ALIGN_BUFFER_PAD(legacy_mbr, p_mbr, 1, dev_desc->blksz);
333 printf("%s: calloc failed!\n", __func__);
337 /* Read MBR to backup boot code if it exists */
338 if (blk_dread(dev_desc, 0, 1, p_mbr) != 1) {
339 pr_err("** Can't read from device %d **\n", dev_desc->devnum);
343 /* Clear all data in MBR except of backed up boot code */
344 memset((char *)p_mbr + MSDOS_MBR_BOOT_CODE_SIZE, 0, sizeof(*p_mbr) -
345 MSDOS_MBR_BOOT_CODE_SIZE);
347 /* Append signature */
348 p_mbr->signature = MSDOS_MBR_SIGNATURE;
349 p_mbr->partition_record[0].sys_ind = EFI_PMBR_OSTYPE_EFI_GPT;
350 p_mbr->partition_record[0].start_sect = 1;
351 p_mbr->partition_record[0].nr_sects = (u32) dev_desc->lba - 1;
353 /* Write MBR sector to the MMC device */
354 if (blk_dwrite(dev_desc, 0, 1, p_mbr) != 1) {
355 printf("** Can't write to device %d **\n",
363 int write_gpt_table(struct blk_desc *dev_desc,
364 gpt_header *gpt_h, gpt_entry *gpt_e)
366 const int pte_blk_cnt = BLOCK_CNT((gpt_h->num_partition_entries
367 * sizeof(gpt_entry)), dev_desc);
370 debug("max lba: %x\n", (u32) dev_desc->lba);
371 /* Setup the Protective MBR */
372 if (set_protective_mbr(dev_desc) < 0)
375 /* Generate CRC for the Primary GPT Header */
376 calc_crc32 = efi_crc32((const unsigned char *)gpt_e,
377 le32_to_cpu(gpt_h->num_partition_entries) *
378 le32_to_cpu(gpt_h->sizeof_partition_entry));
379 gpt_h->partition_entry_array_crc32 = cpu_to_le32(calc_crc32);
381 calc_crc32 = efi_crc32((const unsigned char *)gpt_h,
382 le32_to_cpu(gpt_h->header_size));
383 gpt_h->header_crc32 = cpu_to_le32(calc_crc32);
385 /* Write the First GPT to the block right after the Legacy MBR */
386 if (blk_dwrite(dev_desc, 1, 1, gpt_h) != 1)
389 if (blk_dwrite(dev_desc, le64_to_cpu(gpt_h->partition_entry_lba),
390 pte_blk_cnt, gpt_e) != pte_blk_cnt)
393 prepare_backup_gpt_header(gpt_h);
395 if (blk_dwrite(dev_desc, (lbaint_t)le64_to_cpu(gpt_h->last_usable_lba)
396 + 1, pte_blk_cnt, gpt_e) != pte_blk_cnt)
399 if (blk_dwrite(dev_desc, (lbaint_t)le64_to_cpu(gpt_h->my_lba), 1,
403 debug("GPT successfully written to block device!\n");
407 printf("** Can't write to device %d **\n", dev_desc->devnum);
411 int gpt_fill_pte(struct blk_desc *dev_desc,
412 gpt_header *gpt_h, gpt_entry *gpt_e,
413 struct disk_partition *partitions, int parts)
415 lbaint_t offset = (lbaint_t)le64_to_cpu(gpt_h->first_usable_lba);
416 lbaint_t last_usable_lba = (lbaint_t)
417 le64_to_cpu(gpt_h->last_usable_lba);
419 size_t efiname_len, dosname_len;
420 #if CONFIG_IS_ENABLED(PARTITION_UUIDS)
422 unsigned char *bin_uuid;
424 #ifdef CONFIG_PARTITION_TYPE_GUID
426 unsigned char *bin_type_guid;
428 size_t hdr_start = gpt_h->my_lba;
429 size_t hdr_end = hdr_start + 1;
431 size_t pte_start = gpt_h->partition_entry_lba;
432 size_t pte_end = pte_start +
433 gpt_h->num_partition_entries * gpt_h->sizeof_partition_entry /
436 for (i = 0; i < parts; i++) {
437 /* partition starting lba */
438 lbaint_t start = partitions[i].start;
439 lbaint_t size = partitions[i].size;
442 offset = start + size;
449 * If our partition overlaps with either the GPT
450 * header, or the partition entry, reject it.
452 if (((start < hdr_end && hdr_start < (start + size)) ||
453 (start < pte_end && pte_start < (start + size)))) {
454 printf("Partition overlap\n");
458 gpt_e[i].starting_lba = cpu_to_le64(start);
460 if (offset > (last_usable_lba + 1)) {
461 printf("Partitions layout exceds disk size\n");
464 /* partition ending lba */
465 if ((i == parts - 1) && (size == 0))
466 /* extend the last partition to maximuim */
467 gpt_e[i].ending_lba = gpt_h->last_usable_lba;
469 gpt_e[i].ending_lba = cpu_to_le64(offset - 1);
471 #ifdef CONFIG_PARTITION_TYPE_GUID
472 str_type_guid = partitions[i].type_guid;
473 bin_type_guid = gpt_e[i].partition_type_guid.b;
474 if (strlen(str_type_guid)) {
475 if (uuid_str_to_bin(str_type_guid, bin_type_guid,
476 UUID_STR_FORMAT_GUID)) {
477 printf("Partition no. %d: invalid type guid: %s\n",
482 /* default partition type GUID */
483 memcpy(bin_type_guid,
484 &partition_basic_data_guid, 16);
487 /* partition type GUID */
488 memcpy(gpt_e[i].partition_type_guid.b,
489 &partition_basic_data_guid, 16);
492 #if CONFIG_IS_ENABLED(PARTITION_UUIDS)
493 str_uuid = partitions[i].uuid;
494 bin_uuid = gpt_e[i].unique_partition_guid.b;
496 if (uuid_str_to_bin(str_uuid, bin_uuid, UUID_STR_FORMAT_GUID)) {
497 printf("Partition no. %d: invalid guid: %s\n",
503 /* partition attributes */
504 memset(&gpt_e[i].attributes, 0,
505 sizeof(gpt_entry_attributes));
507 if (partitions[i].bootable & PART_BOOTABLE)
508 gpt_e[i].attributes.fields.legacy_bios_bootable = 1;
511 efiname_len = sizeof(gpt_e[i].partition_name)
512 / sizeof(efi_char16_t);
513 dosname_len = sizeof(partitions[i].name);
515 memset(gpt_e[i].partition_name, 0,
516 sizeof(gpt_e[i].partition_name));
518 for (k = 0; k < min(dosname_len, efiname_len); k++)
519 gpt_e[i].partition_name[k] =
520 (efi_char16_t)(partitions[i].name[k]);
522 debug("%s: name: %s offset[%d]: 0x" LBAF
523 " size[%d]: 0x" LBAF "\n",
524 __func__, partitions[i].name, i,
531 static uint32_t partition_entries_offset(struct blk_desc *dev_desc)
533 uint32_t offset_blks = 2;
534 uint32_t __maybe_unused offset_bytes;
535 int __maybe_unused config_offset;
537 #if defined(CONFIG_EFI_PARTITION_ENTRIES_OFF)
539 * Some architectures require their SPL loader at a fixed
540 * address within the first 16KB of the disk. To avoid an
541 * overlap with the partition entries of the EFI partition
542 * table, the first safe offset (in bytes, from the start of
543 * the disk) for the entries can be set in
544 * CONFIG_EFI_PARTITION_ENTRIES_OFF.
547 PAD_TO_BLOCKSIZE(CONFIG_EFI_PARTITION_ENTRIES_OFF, dev_desc);
548 offset_blks = offset_bytes / dev_desc->blksz;
551 #if defined(CONFIG_OF_CONTROL)
553 * Allow the offset of the first partition entires (in bytes
554 * from the start of the device) to be specified as a property
555 * of the device tree '/config' node.
557 config_offset = ofnode_conf_read_int(
558 "u-boot,efi-partition-entries-offset", -EINVAL);
559 if (config_offset != -EINVAL) {
560 offset_bytes = PAD_TO_BLOCKSIZE(config_offset, dev_desc);
561 offset_blks = offset_bytes / dev_desc->blksz;
565 debug("efi: partition entries offset (in blocks): %d\n", offset_blks);
568 * The earliest LBA this can be at is LBA#2 (i.e. right behind
569 * the (protective) MBR and the GPT header.
577 int gpt_fill_header(struct blk_desc *dev_desc, gpt_header *gpt_h,
578 char *str_guid, int parts_count)
580 gpt_h->signature = cpu_to_le64(GPT_HEADER_SIGNATURE_UBOOT);
581 gpt_h->revision = cpu_to_le32(GPT_HEADER_REVISION_V1);
582 gpt_h->header_size = cpu_to_le32(sizeof(gpt_header));
583 gpt_h->my_lba = cpu_to_le64(1);
584 gpt_h->alternate_lba = cpu_to_le64(dev_desc->lba - 1);
585 gpt_h->last_usable_lba = cpu_to_le64(dev_desc->lba - 34);
586 gpt_h->partition_entry_lba =
587 cpu_to_le64(partition_entries_offset(dev_desc));
588 gpt_h->first_usable_lba =
589 cpu_to_le64(le64_to_cpu(gpt_h->partition_entry_lba) + 32);
590 gpt_h->num_partition_entries = cpu_to_le32(GPT_ENTRY_NUMBERS);
591 gpt_h->sizeof_partition_entry = cpu_to_le32(sizeof(gpt_entry));
592 gpt_h->header_crc32 = 0;
593 gpt_h->partition_entry_array_crc32 = 0;
595 if (uuid_str_to_bin(str_guid, gpt_h->disk_guid.b, UUID_STR_FORMAT_GUID))
601 int gpt_restore(struct blk_desc *dev_desc, char *str_disk_guid,
602 struct disk_partition *partitions, int parts_count)
608 size = PAD_TO_BLOCKSIZE(sizeof(gpt_header), dev_desc);
609 gpt_h = malloc_cache_aligned(size);
611 printf("%s: calloc failed!\n", __func__);
614 memset(gpt_h, 0, size);
616 size = PAD_TO_BLOCKSIZE(GPT_ENTRY_NUMBERS * sizeof(gpt_entry),
618 gpt_e = malloc_cache_aligned(size);
620 printf("%s: calloc failed!\n", __func__);
624 memset(gpt_e, 0, size);
626 /* Generate Primary GPT header (LBA1) */
627 ret = gpt_fill_header(dev_desc, gpt_h, str_disk_guid, parts_count);
631 /* Generate partition entries */
632 ret = gpt_fill_pte(dev_desc, gpt_h, gpt_e, partitions, parts_count);
636 /* Write GPT partition table */
637 ret = write_gpt_table(dev_desc, gpt_h, gpt_e);
646 * gpt_convert_efi_name_to_char() - convert u16 string to char string
648 * TODO: this conversion only supports ANSI characters
651 * @es: u16 string to be converted
652 * @n: size of target buffer
654 static void gpt_convert_efi_name_to_char(char *s, void *es, int n)
661 for (i = 0, j = 0; j < n; i += 2, j++) {
668 int gpt_verify_headers(struct blk_desc *dev_desc, gpt_header *gpt_head,
672 * This function validates AND
673 * fills in the GPT header and PTE
675 if (is_gpt_valid(dev_desc,
676 GPT_PRIMARY_PARTITION_TABLE_LBA,
677 gpt_head, gpt_pte) != 1) {
678 printf("%s: *** ERROR: Invalid GPT ***\n",
683 /* Free pte before allocating again */
687 * Check that the alternate_lba entry points to the last LBA
689 if (le64_to_cpu(gpt_head->alternate_lba) != (dev_desc->lba - 1)) {
690 printf("%s: *** ERROR: Misplaced Backup 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 static void restore_primary_gpt_header(gpt_header *gpt_h, struct blk_desc *dev_desc)
710 /* recalculate the values for the Primary GPT Header */
711 val = le64_to_cpu(gpt_h->my_lba);
712 gpt_h->my_lba = gpt_h->alternate_lba;
713 gpt_h->alternate_lba = cpu_to_le64(val);
714 gpt_h->partition_entry_lba = cpu_to_le64(partition_entries_offset(dev_desc));
716 gpt_h->header_crc32 = 0;
718 calc_crc32 = efi_crc32((const unsigned char *)gpt_h,
719 le32_to_cpu(gpt_h->header_size));
720 gpt_h->header_crc32 = cpu_to_le32(calc_crc32);
723 static int write_one_gpt_table(struct blk_desc *dev_desc,
724 gpt_header *gpt_h, gpt_entry *gpt_e)
726 const int pte_blk_cnt = BLOCK_CNT((gpt_h->num_partition_entries
727 * sizeof(gpt_entry)), dev_desc);
731 start = le64_to_cpu(gpt_h->my_lba);
732 if (blk_dwrite(dev_desc, start, 1, gpt_h) != 1) {
737 start = le64_to_cpu(gpt_h->partition_entry_lba);
738 if (blk_dwrite(dev_desc, start, pte_blk_cnt, gpt_e) != pte_blk_cnt) {
747 int gpt_repair_headers(struct blk_desc *dev_desc)
749 ALLOC_CACHE_ALIGN_BUFFER_PAD(gpt_header, gpt_h1, 1, dev_desc->blksz);
750 ALLOC_CACHE_ALIGN_BUFFER_PAD(gpt_header, gpt_h2, 1, dev_desc->blksz);
751 gpt_entry *gpt_e1 = NULL, *gpt_e2 = NULL;
752 int is_gpt1_valid, is_gpt2_valid;
755 is_gpt1_valid = is_gpt_valid(dev_desc, GPT_PRIMARY_PARTITION_TABLE_LBA,
757 is_gpt2_valid = is_gpt_valid(dev_desc, dev_desc->lba - 1,
760 if (is_gpt1_valid && is_gpt2_valid) {
765 if (is_gpt1_valid && !is_gpt2_valid) {
766 prepare_backup_gpt_header(gpt_h1);
767 ret = write_one_gpt_table(dev_desc, gpt_h1, gpt_e1);
771 if (!is_gpt1_valid && is_gpt2_valid) {
772 restore_primary_gpt_header(gpt_h2, dev_desc);
773 ret = write_one_gpt_table(dev_desc, gpt_h2, gpt_e2);
777 if (!is_gpt1_valid && !is_gpt2_valid) {
791 int gpt_verify_partitions(struct blk_desc *dev_desc,
792 struct disk_partition *partitions, int parts,
793 gpt_header *gpt_head, gpt_entry **gpt_pte)
795 char efi_str[PARTNAME_SZ + 1];
800 ret = gpt_verify_headers(dev_desc, gpt_head, gpt_pte);
806 for (i = 0; i < parts; i++) {
807 if (i == gpt_head->num_partition_entries) {
808 pr_err("More partitions than allowed!\n");
812 /* Check if GPT and ENV partition names match */
813 gpt_convert_efi_name_to_char(efi_str, gpt_e[i].partition_name,
816 debug("%s: part: %2d name - GPT: %16s, ENV: %16s ",
817 __func__, i, efi_str, partitions[i].name);
819 if (strncmp(efi_str, (char *)partitions[i].name,
820 sizeof(partitions->name))) {
821 pr_err("Partition name: %s does not match %s!\n",
822 efi_str, (char *)partitions[i].name);
826 /* Check if GPT and ENV sizes match */
827 gpt_part_size = le64_to_cpu(gpt_e[i].ending_lba) -
828 le64_to_cpu(gpt_e[i].starting_lba) + 1;
829 debug("size(LBA) - GPT: %8llu, ENV: %8llu ",
830 (unsigned long long)gpt_part_size,
831 (unsigned long long)partitions[i].size);
833 if (le64_to_cpu(gpt_part_size) != partitions[i].size) {
834 /* We do not check the extend partition size */
835 if ((i == parts - 1) && (partitions[i].size == 0))
838 pr_err("Partition %s size: %llu does not match %llu!\n",
839 efi_str, (unsigned long long)gpt_part_size,
840 (unsigned long long)partitions[i].size);
845 * Start address is optional - check only if provided
846 * in '$partition' variable
848 if (!partitions[i].start) {
853 /* Check if GPT and ENV start LBAs match */
854 debug("start LBA - GPT: %8llu, ENV: %8llu\n",
855 le64_to_cpu(gpt_e[i].starting_lba),
856 (unsigned long long)partitions[i].start);
858 if (le64_to_cpu(gpt_e[i].starting_lba) != partitions[i].start) {
859 pr_err("Partition %s start: %llu does not match %llu!\n",
860 efi_str, le64_to_cpu(gpt_e[i].starting_lba),
861 (unsigned long long)partitions[i].start);
869 int is_valid_gpt_buf(struct blk_desc *dev_desc, void *buf)
874 /* determine start of GPT Header in the buffer */
875 gpt_h = buf + (GPT_PRIMARY_PARTITION_TABLE_LBA *
877 if (validate_gpt_header(gpt_h, GPT_PRIMARY_PARTITION_TABLE_LBA,
881 /* determine start of GPT Entries in the buffer */
882 gpt_e = buf + (le64_to_cpu(gpt_h->partition_entry_lba) *
884 if (validate_gpt_entries(gpt_h, gpt_e))
890 int write_mbr_and_gpt_partitions(struct blk_desc *dev_desc, void *buf)
898 if (is_valid_gpt_buf(dev_desc, buf))
901 /* determine start of GPT Header in the buffer */
902 gpt_h = buf + (GPT_PRIMARY_PARTITION_TABLE_LBA *
905 /* determine start of GPT Entries in the buffer */
906 gpt_e = buf + (le64_to_cpu(gpt_h->partition_entry_lba) *
908 gpt_e_blk_cnt = BLOCK_CNT((le32_to_cpu(gpt_h->num_partition_entries) *
909 le32_to_cpu(gpt_h->sizeof_partition_entry)),
913 lba = 0; /* MBR is always at 0 */
914 cnt = 1; /* MBR (1 block) */
915 if (blk_dwrite(dev_desc, lba, cnt, buf) != cnt) {
916 printf("%s: failed writing '%s' (%d blks at 0x" LBAF ")\n",
917 __func__, "MBR", cnt, lba);
921 /* write Primary GPT */
922 lba = GPT_PRIMARY_PARTITION_TABLE_LBA;
923 cnt = 1; /* GPT Header (1 block) */
924 if (blk_dwrite(dev_desc, lba, cnt, gpt_h) != cnt) {
925 printf("%s: failed writing '%s' (%d blks at 0x" LBAF ")\n",
926 __func__, "Primary GPT Header", cnt, lba);
930 lba = le64_to_cpu(gpt_h->partition_entry_lba);
932 if (blk_dwrite(dev_desc, lba, cnt, gpt_e) != cnt) {
933 printf("%s: failed writing '%s' (%d blks at 0x" LBAF ")\n",
934 __func__, "Primary GPT Entries", cnt, lba);
938 prepare_backup_gpt_header(gpt_h);
940 /* write Backup GPT */
941 lba = le64_to_cpu(gpt_h->partition_entry_lba);
943 if (blk_dwrite(dev_desc, lba, cnt, gpt_e) != cnt) {
944 printf("%s: failed writing '%s' (%d blks at 0x" LBAF ")\n",
945 __func__, "Backup GPT Entries", cnt, lba);
949 lba = le64_to_cpu(gpt_h->my_lba);
950 cnt = 1; /* GPT Header (1 block) */
951 if (blk_dwrite(dev_desc, lba, cnt, gpt_h) != cnt) {
952 printf("%s: failed writing '%s' (%d blks at 0x" LBAF ")\n",
953 __func__, "Backup GPT Header", cnt, lba);
957 /* Update the partition table entries*/
968 * pmbr_part_valid(): Check for EFI partition signature
970 * Returns: 1 if EFI GPT partition type is found.
972 static int pmbr_part_valid(struct partition *part)
974 if (part->sys_ind == EFI_PMBR_OSTYPE_EFI_GPT &&
975 get_unaligned_le32(&part->start_sect) == 1UL) {
983 * is_pmbr_valid(): test Protective MBR for validity
985 * Returns: 1 if PMBR is valid, 0 otherwise.
986 * Validity depends on two things:
987 * 1) MSDOS signature is in the last two bytes of the MBR
988 * 2) One partition of type 0xEE is found, checked by pmbr_part_valid()
990 static int is_pmbr_valid(legacy_mbr * mbr)
994 if (!mbr || le16_to_cpu(mbr->signature) != MSDOS_MBR_SIGNATURE)
997 for (i = 0; i < 4; i++) {
998 if (pmbr_part_valid(&mbr->partition_record[i])) {
1006 * is_gpt_valid() - tests one GPT header and PTEs for validity
1008 * lba is the logical block address of the GPT header to test
1009 * gpt is a GPT header ptr, filled on return.
1010 * ptes is a PTEs ptr, filled on return.
1012 * Description: returns 1 if valid, 0 on error, 2 if ignored header
1013 * If valid, returns pointers to PTEs.
1015 static int is_gpt_valid(struct blk_desc *dev_desc, u64 lba,
1016 gpt_header *pgpt_head, gpt_entry **pgpt_pte)
1018 /* Confirm valid arguments prior to allocation. */
1019 if (!dev_desc || !pgpt_head) {
1020 printf("%s: Invalid Argument(s)\n", __func__);
1024 ALLOC_CACHE_ALIGN_BUFFER_PAD(legacy_mbr, mbr, 1, dev_desc->blksz);
1026 /* Read MBR Header from device */
1027 if (blk_dread(dev_desc, 0, 1, (ulong *)mbr) != 1) {
1028 printf("*** ERROR: Can't read MBR header ***\n");
1032 /* Read GPT Header from device */
1033 if (blk_dread(dev_desc, (lbaint_t)lba, 1, pgpt_head) != 1) {
1034 printf("*** ERROR: Can't read GPT header ***\n");
1038 /* Invalid but nothing to yell about. */
1039 if (le64_to_cpu(pgpt_head->signature) == GPT_HEADER_CHROMEOS_IGNORE) {
1040 debug("ChromeOS 'IGNOREME' GPT header found and ignored\n");
1044 if (validate_gpt_header(pgpt_head, (lbaint_t)lba, dev_desc->lba))
1047 if (dev_desc->sig_type == SIG_TYPE_NONE) {
1048 efi_guid_t empty = {};
1049 if (memcmp(&pgpt_head->disk_guid, &empty, sizeof(empty))) {
1050 dev_desc->sig_type = SIG_TYPE_GUID;
1051 memcpy(&dev_desc->guid_sig, &pgpt_head->disk_guid,
1053 } else if (mbr->unique_mbr_signature != 0) {
1054 dev_desc->sig_type = SIG_TYPE_MBR;
1055 dev_desc->mbr_sig = mbr->unique_mbr_signature;
1059 /* Read and allocate Partition Table Entries */
1060 *pgpt_pte = alloc_read_gpt_entries(dev_desc, pgpt_head);
1064 if (validate_gpt_entries(pgpt_head, *pgpt_pte)) {
1069 /* We're done, all's well */
1074 * find_valid_gpt() - finds a valid GPT header and PTEs
1076 * gpt is a GPT header ptr, filled on return.
1077 * ptes is a PTEs ptr, filled on return.
1079 * Description: returns 1 if found a valid gpt, 0 on error.
1080 * If valid, returns pointers to PTEs.
1082 static int find_valid_gpt(struct blk_desc *dev_desc, gpt_header *gpt_head,
1083 gpt_entry **pgpt_pte)
1087 r = is_gpt_valid(dev_desc, GPT_PRIMARY_PARTITION_TABLE_LBA, gpt_head,
1092 printf("%s: *** ERROR: Invalid GPT ***\n", __func__);
1094 if (is_gpt_valid(dev_desc, (dev_desc->lba - 1), gpt_head,
1096 printf("%s: *** ERROR: Invalid Backup GPT ***\n",
1101 printf("%s: *** Using Backup GPT ***\n",
1108 * alloc_read_gpt_entries(): reads partition entries from disk
1112 * Description: Returns ptes on success, NULL on error.
1113 * Allocates space for PTEs based on information found in @gpt.
1114 * Notes: remember to free pte when you're done!
1116 static gpt_entry *alloc_read_gpt_entries(struct blk_desc *dev_desc,
1117 gpt_header *pgpt_head)
1119 size_t count = 0, blk_cnt;
1121 gpt_entry *pte = NULL;
1123 if (!dev_desc || !pgpt_head) {
1124 printf("%s: Invalid Argument(s)\n", __func__);
1128 count = le32_to_cpu(pgpt_head->num_partition_entries) *
1129 le32_to_cpu(pgpt_head->sizeof_partition_entry);
1131 debug("%s: count = %u * %u = %lu\n", __func__,
1132 (u32) le32_to_cpu(pgpt_head->num_partition_entries),
1133 (u32) le32_to_cpu(pgpt_head->sizeof_partition_entry),
1136 /* Allocate memory for PTE, remember to FREE */
1138 pte = memalign(ARCH_DMA_MINALIGN,
1139 PAD_TO_BLOCKSIZE(count, dev_desc));
1142 if (count == 0 || pte == NULL) {
1143 printf("%s: ERROR: Can't allocate %#lX bytes for GPT Entries\n",
1144 __func__, (ulong)count);
1148 /* Read GPT Entries from device */
1149 blk = le64_to_cpu(pgpt_head->partition_entry_lba);
1150 blk_cnt = BLOCK_CNT(count, dev_desc);
1151 if (blk_dread(dev_desc, blk, (lbaint_t)blk_cnt, pte) != blk_cnt) {
1152 printf("*** ERROR: Can't read GPT Entries ***\n");
1160 * is_pte_valid(): validates a single Partition Table Entry
1161 * @gpt_entry - Pointer to a single Partition Table Entry
1163 * Description: returns 1 if valid, 0 on error.
1165 static int is_pte_valid(gpt_entry * pte)
1167 efi_guid_t unused_guid;
1170 printf("%s: Invalid Argument(s)\n", __func__);
1174 /* Only one validation for now:
1175 * The GUID Partition Type != Unused Entry (ALL-ZERO)
1177 memset(unused_guid.b, 0, sizeof(unused_guid.b));
1179 if (memcmp(pte->partition_type_guid.b, unused_guid.b,
1180 sizeof(unused_guid.b)) == 0) {
1182 debug("%s: Found an unused PTE GUID at 0x%08X\n", __func__,
1183 (unsigned int)(uintptr_t)pte);
1192 * Add an 'a_' prefix so it comes before 'dos' in the linker list. We need to
1193 * check EFI first, since a DOS partition is often used as a 'protective MBR'
1196 U_BOOT_PART_TYPE(a_efi) = {
1198 .part_type = PART_TYPE_EFI,
1199 .max_entries = GPT_ENTRY_NUMBERS,
1200 .get_info = part_get_info_ptr(part_get_info_efi),
1201 .print = part_print_ptr(part_print_efi),
1202 .test = part_test_efi,