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 <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 log_debug("%s signature is wrong: %#llX != %#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 log_debug("%s: CRC is wrong: %#x != %#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 log_debug("GPT: my_lba incorrect: %llX != " LBAF "\n",
125 le64_to_cpu(gpt_h->my_lba), lba);
130 * Check that the first_usable_lba and that the last_usable_lba are
133 if (le64_to_cpu(gpt_h->first_usable_lba) > lastlba) {
134 log_debug("GPT: first_usable_lba incorrect: %llX > " LBAF "\n",
135 le64_to_cpu(gpt_h->first_usable_lba), lastlba);
138 if (le64_to_cpu(gpt_h->last_usable_lba) > lastlba) {
139 log_debug("GPT: last_usable_lba incorrect: %llX > " LBAF "\n",
140 le64_to_cpu(gpt_h->last_usable_lba), lastlba);
144 debug("GPT: first_usable_lba: %llX last_usable_lba: %llX last lba: "
145 LBAF "\n", le64_to_cpu(gpt_h->first_usable_lba),
146 le64_to_cpu(gpt_h->last_usable_lba), lastlba);
151 static int validate_gpt_entries(gpt_header *gpt_h, gpt_entry *gpt_e)
155 /* Check the GUID Partition Table Entry Array CRC */
156 calc_crc32 = efi_crc32((const unsigned char *)gpt_e,
157 le32_to_cpu(gpt_h->num_partition_entries) *
158 le32_to_cpu(gpt_h->sizeof_partition_entry));
160 if (calc_crc32 != le32_to_cpu(gpt_h->partition_entry_array_crc32)) {
161 log_debug("%s: %#x != %#x\n",
162 "GUID Partition Table Entry Array CRC is wrong",
163 le32_to_cpu(gpt_h->partition_entry_array_crc32),
171 static void prepare_backup_gpt_header(gpt_header *gpt_h)
176 /* recalculate the values for the Backup GPT Header */
177 val = le64_to_cpu(gpt_h->my_lba);
178 gpt_h->my_lba = gpt_h->alternate_lba;
179 gpt_h->alternate_lba = cpu_to_le64(val);
180 gpt_h->partition_entry_lba =
181 cpu_to_le64(le64_to_cpu(gpt_h->last_usable_lba) + 1);
182 gpt_h->header_crc32 = 0;
184 calc_crc32 = efi_crc32((const unsigned char *)gpt_h,
185 le32_to_cpu(gpt_h->header_size));
186 gpt_h->header_crc32 = cpu_to_le32(calc_crc32);
189 #if CONFIG_IS_ENABLED(EFI_PARTITION)
191 * Public Functions (include/part.h)
195 * UUID is displayed as 32 hexadecimal digits, in 5 groups,
196 * separated by hyphens, in the form 8-4-4-4-12 for a total of 36 characters
198 int get_disk_guid(struct blk_desc * dev_desc, char *guid)
200 ALLOC_CACHE_ALIGN_BUFFER_PAD(gpt_header, gpt_head, 1, dev_desc->blksz);
201 gpt_entry *gpt_pte = NULL;
202 unsigned char *guid_bin;
204 /* This function validates AND fills in the GPT header and PTE */
205 if (find_valid_gpt(dev_desc, gpt_head, &gpt_pte) != 1)
208 guid_bin = gpt_head->disk_guid.b;
209 uuid_bin_to_str(guid_bin, guid, UUID_STR_FORMAT_GUID);
211 /* Remember to free pte */
216 void part_print_efi(struct blk_desc *dev_desc)
218 ALLOC_CACHE_ALIGN_BUFFER_PAD(gpt_header, gpt_head, 1, dev_desc->blksz);
219 gpt_entry *gpt_pte = NULL;
223 /* This function validates AND fills in the GPT header and PTE */
224 if (find_valid_gpt(dev_desc, gpt_head, &gpt_pte) != 1)
227 debug("%s: gpt-entry at %p\n", __func__, gpt_pte);
229 printf("Part\tStart LBA\tEnd LBA\t\tName\n");
230 printf("\tAttributes\n");
231 printf("\tType GUID\n");
232 printf("\tPartition GUID\n");
234 for (i = 0; i < le32_to_cpu(gpt_head->num_partition_entries); i++) {
235 /* Skip invalid PTE */
236 if (!is_pte_valid(&gpt_pte[i]))
239 printf("%3d\t0x%08llx\t0x%08llx\t\"%s\"\n", (i + 1),
240 le64_to_cpu(gpt_pte[i].starting_lba),
241 le64_to_cpu(gpt_pte[i].ending_lba),
242 print_efiname(&gpt_pte[i]));
243 printf("\tattrs:\t0x%016llx\n", gpt_pte[i].attributes.raw);
244 uuid = (unsigned char *)gpt_pte[i].partition_type_guid.b;
245 if (IS_ENABLED(CONFIG_PARTITION_TYPE_GUID))
246 printf("\ttype:\t%pUl\n\t\t(%pUs)\n", uuid, uuid);
248 printf("\ttype:\t%pUl\n", uuid);
249 uuid = (unsigned char *)gpt_pte[i].unique_partition_guid.b;
250 printf("\tguid:\t%pUl\n", uuid);
253 /* Remember to free pte */
258 int part_get_info_efi(struct blk_desc *dev_desc, int part,
259 struct disk_partition *info)
261 ALLOC_CACHE_ALIGN_BUFFER_PAD(gpt_header, gpt_head, 1, dev_desc->blksz);
262 gpt_entry *gpt_pte = NULL;
264 /* "part" argument must be at least 1 */
266 log_debug("Invalid Argument(s)\n");
270 /* This function validates AND fills in the GPT header and PTE */
271 if (find_valid_gpt(dev_desc, gpt_head, &gpt_pte) != 1)
274 if (part > le32_to_cpu(gpt_head->num_partition_entries) ||
275 !is_pte_valid(&gpt_pte[part - 1])) {
276 log_debug("Invalid partition number %d\n", part);
281 /* The 'lbaint_t' casting may limit the maximum disk size to 2 TB */
282 info->start = (lbaint_t)le64_to_cpu(gpt_pte[part - 1].starting_lba);
283 /* The ending LBA is inclusive, to calculate size, add 1 to it */
284 info->size = (lbaint_t)le64_to_cpu(gpt_pte[part - 1].ending_lba) + 1
286 info->blksz = dev_desc->blksz;
288 snprintf((char *)info->name, sizeof(info->name), "%s",
289 print_efiname(&gpt_pte[part - 1]));
290 strcpy((char *)info->type, "U-Boot");
291 info->bootable = get_bootable(&gpt_pte[part - 1]);
292 #if CONFIG_IS_ENABLED(PARTITION_UUIDS)
293 uuid_bin_to_str(gpt_pte[part - 1].unique_partition_guid.b, info->uuid,
294 UUID_STR_FORMAT_GUID);
296 #ifdef CONFIG_PARTITION_TYPE_GUID
297 uuid_bin_to_str(gpt_pte[part - 1].partition_type_guid.b,
298 info->type_guid, UUID_STR_FORMAT_GUID);
301 log_debug("start 0x" LBAF ", size 0x" LBAF ", name %s\n", info->start,
302 info->size, info->name);
304 /* Remember to free pte */
309 static int part_test_efi(struct blk_desc *dev_desc)
311 ALLOC_CACHE_ALIGN_BUFFER_PAD(legacy_mbr, legacymbr, 1, dev_desc->blksz);
313 /* Read legacy MBR from block 0 and validate it */
314 if ((blk_dread(dev_desc, 0, 1, (ulong *)legacymbr) != 1)
315 || (is_pmbr_valid(legacymbr) != 1)) {
322 * set_protective_mbr(): Set the EFI protective MBR
323 * @param dev_desc - block device descriptor
325 * Return: - zero on success, otherwise error
327 static int set_protective_mbr(struct blk_desc *dev_desc)
329 /* Setup the Protective MBR */
330 ALLOC_CACHE_ALIGN_BUFFER_PAD(legacy_mbr, p_mbr, 1, dev_desc->blksz);
332 log_debug("calloc failed!\n");
336 /* Read MBR to backup boot code if it exists */
337 if (blk_dread(dev_desc, 0, 1, p_mbr) != 1) {
338 log_debug("** Can't read from device %d **\n",
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 log_debug("** Can't write to device %d **\n", dev_desc->devnum);
362 int write_gpt_table(struct blk_desc *dev_desc,
363 gpt_header *gpt_h, gpt_entry *gpt_e)
365 const int pte_blk_cnt = BLOCK_CNT((gpt_h->num_partition_entries
366 * sizeof(gpt_entry)), dev_desc);
369 debug("max lba: %x\n", (u32) dev_desc->lba);
370 /* Setup the Protective MBR */
371 if (set_protective_mbr(dev_desc) < 0)
374 /* Generate CRC for the Primary GPT Header */
375 calc_crc32 = efi_crc32((const unsigned char *)gpt_e,
376 le32_to_cpu(gpt_h->num_partition_entries) *
377 le32_to_cpu(gpt_h->sizeof_partition_entry));
378 gpt_h->partition_entry_array_crc32 = cpu_to_le32(calc_crc32);
380 calc_crc32 = efi_crc32((const unsigned char *)gpt_h,
381 le32_to_cpu(gpt_h->header_size));
382 gpt_h->header_crc32 = cpu_to_le32(calc_crc32);
384 /* Write the First GPT to the block right after the Legacy MBR */
385 if (blk_dwrite(dev_desc, 1, 1, gpt_h) != 1)
388 if (blk_dwrite(dev_desc, le64_to_cpu(gpt_h->partition_entry_lba),
389 pte_blk_cnt, gpt_e) != pte_blk_cnt)
392 prepare_backup_gpt_header(gpt_h);
394 if (blk_dwrite(dev_desc, (lbaint_t)le64_to_cpu(gpt_h->last_usable_lba)
395 + 1, pte_blk_cnt, gpt_e) != pte_blk_cnt)
398 if (blk_dwrite(dev_desc, (lbaint_t)le64_to_cpu(gpt_h->my_lba), 1,
402 debug("GPT successfully written to block device!\n");
406 log_debug("** Can't write to device %d **\n", dev_desc->devnum);
410 int gpt_fill_pte(struct blk_desc *dev_desc,
411 gpt_header *gpt_h, gpt_entry *gpt_e,
412 struct disk_partition *partitions, int parts)
414 lbaint_t offset = (lbaint_t)le64_to_cpu(gpt_h->first_usable_lba);
415 lbaint_t last_usable_lba = (lbaint_t)
416 le64_to_cpu(gpt_h->last_usable_lba);
418 size_t efiname_len, dosname_len;
419 #if CONFIG_IS_ENABLED(PARTITION_UUIDS)
421 unsigned char *bin_uuid;
423 #ifdef CONFIG_PARTITION_TYPE_GUID
425 unsigned char *bin_type_guid;
427 size_t hdr_start = gpt_h->my_lba;
428 size_t hdr_end = hdr_start + 1;
430 size_t pte_start = gpt_h->partition_entry_lba;
431 size_t pte_end = pte_start +
432 gpt_h->num_partition_entries * gpt_h->sizeof_partition_entry /
435 for (i = 0; i < parts; i++) {
436 /* partition starting lba */
437 lbaint_t start = partitions[i].start;
438 lbaint_t size = partitions[i].size;
441 offset = start + size;
448 * If our partition overlaps with either the GPT
449 * header, or the partition entry, reject it.
451 if (((start < hdr_end && hdr_start < (start + size)) ||
452 (start < pte_end && pte_start < (start + size)))) {
453 log_debug("Partition overlap\n");
457 gpt_e[i].starting_lba = cpu_to_le64(start);
459 if (offset > (last_usable_lba + 1)) {
460 log_debug("Partitions layout exceeds disk size\n");
463 /* partition ending lba */
464 if ((i == parts - 1) && (size == 0))
465 /* extend the last partition to maximuim */
466 gpt_e[i].ending_lba = gpt_h->last_usable_lba;
468 gpt_e[i].ending_lba = cpu_to_le64(offset - 1);
470 #ifdef CONFIG_PARTITION_TYPE_GUID
471 str_type_guid = partitions[i].type_guid;
472 bin_type_guid = gpt_e[i].partition_type_guid.b;
473 if (strlen(str_type_guid)) {
474 if (uuid_str_to_bin(str_type_guid, bin_type_guid,
475 UUID_STR_FORMAT_GUID)) {
476 log_debug("Partition no. %d: invalid type guid: %s\n",
481 /* default partition type GUID */
482 memcpy(bin_type_guid,
483 &partition_basic_data_guid, 16);
486 /* partition type GUID */
487 memcpy(gpt_e[i].partition_type_guid.b,
488 &partition_basic_data_guid, 16);
491 #if CONFIG_IS_ENABLED(PARTITION_UUIDS)
492 str_uuid = partitions[i].uuid;
493 bin_uuid = gpt_e[i].unique_partition_guid.b;
495 if (uuid_str_to_bin(str_uuid, bin_uuid, UUID_STR_FORMAT_GUID)) {
496 log_debug("Partition no. %d: invalid guid: %s\n",
502 /* partition attributes */
503 memset(&gpt_e[i].attributes, 0,
504 sizeof(gpt_entry_attributes));
506 if (partitions[i].bootable & PART_BOOTABLE)
507 gpt_e[i].attributes.fields.legacy_bios_bootable = 1;
510 efiname_len = sizeof(gpt_e[i].partition_name)
511 / sizeof(efi_char16_t);
512 dosname_len = sizeof(partitions[i].name);
514 memset(gpt_e[i].partition_name, 0,
515 sizeof(gpt_e[i].partition_name));
517 for (k = 0; k < min(dosname_len, efiname_len); k++)
518 gpt_e[i].partition_name[k] =
519 (efi_char16_t)(partitions[i].name[k]);
521 debug("%s: name: %s offset[%d]: 0x" LBAF
522 " size[%d]: 0x" LBAF "\n",
523 __func__, partitions[i].name, i,
530 static uint32_t partition_entries_offset(struct blk_desc *dev_desc)
532 uint32_t offset_blks = 2;
533 uint32_t __maybe_unused offset_bytes;
534 int __maybe_unused config_offset;
536 #if defined(CONFIG_EFI_PARTITION_ENTRIES_OFF)
538 * Some architectures require their SPL loader at a fixed
539 * address within the first 16KB of the disk. To avoid an
540 * overlap with the partition entries of the EFI partition
541 * table, the first safe offset (in bytes, from the start of
542 * the disk) for the entries can be set in
543 * CONFIG_EFI_PARTITION_ENTRIES_OFF.
546 PAD_TO_BLOCKSIZE(CONFIG_EFI_PARTITION_ENTRIES_OFF, dev_desc);
547 offset_blks = offset_bytes / dev_desc->blksz;
550 #if defined(CONFIG_OF_CONTROL)
552 * Allow the offset of the first partition entires (in bytes
553 * from the start of the device) to be specified as a property
554 * of the device tree '/config' node.
556 config_offset = ofnode_conf_read_int(
557 "u-boot,efi-partition-entries-offset", -EINVAL);
558 if (config_offset != -EINVAL) {
559 offset_bytes = PAD_TO_BLOCKSIZE(config_offset, dev_desc);
560 offset_blks = offset_bytes / dev_desc->blksz;
564 debug("efi: partition entries offset (in blocks): %d\n", offset_blks);
567 * The earliest LBA this can be at is LBA#2 (i.e. right behind
568 * the (protective) MBR and the GPT header.
576 int gpt_fill_header(struct blk_desc *dev_desc, gpt_header *gpt_h,
577 char *str_guid, int parts_count)
579 gpt_h->signature = cpu_to_le64(GPT_HEADER_SIGNATURE_UBOOT);
580 gpt_h->revision = cpu_to_le32(GPT_HEADER_REVISION_V1);
581 gpt_h->header_size = cpu_to_le32(sizeof(gpt_header));
582 gpt_h->my_lba = cpu_to_le64(1);
583 gpt_h->alternate_lba = cpu_to_le64(dev_desc->lba - 1);
584 gpt_h->last_usable_lba = cpu_to_le64(dev_desc->lba - 34);
585 gpt_h->partition_entry_lba =
586 cpu_to_le64(partition_entries_offset(dev_desc));
587 gpt_h->first_usable_lba =
588 cpu_to_le64(le64_to_cpu(gpt_h->partition_entry_lba) + 32);
589 gpt_h->num_partition_entries = cpu_to_le32(GPT_ENTRY_NUMBERS);
590 gpt_h->sizeof_partition_entry = cpu_to_le32(sizeof(gpt_entry));
591 gpt_h->header_crc32 = 0;
592 gpt_h->partition_entry_array_crc32 = 0;
594 if (uuid_str_to_bin(str_guid, gpt_h->disk_guid.b, UUID_STR_FORMAT_GUID))
600 int gpt_restore(struct blk_desc *dev_desc, char *str_disk_guid,
601 struct disk_partition *partitions, int parts_count)
607 size = PAD_TO_BLOCKSIZE(sizeof(gpt_header), dev_desc);
608 gpt_h = malloc_cache_aligned(size);
610 log_debug("calloc failed!\n");
613 memset(gpt_h, 0, size);
615 size = PAD_TO_BLOCKSIZE(GPT_ENTRY_NUMBERS * sizeof(gpt_entry),
617 gpt_e = malloc_cache_aligned(size);
619 log_debug("calloc failed!\n");
623 memset(gpt_e, 0, size);
625 /* Generate Primary GPT header (LBA1) */
626 ret = gpt_fill_header(dev_desc, gpt_h, str_disk_guid, parts_count);
630 /* Generate partition entries */
631 ret = gpt_fill_pte(dev_desc, gpt_h, gpt_e, partitions, parts_count);
635 /* Write GPT partition table */
636 ret = write_gpt_table(dev_desc, gpt_h, gpt_e);
645 * gpt_convert_efi_name_to_char() - convert u16 string to char string
647 * TODO: this conversion only supports ANSI characters
650 * @es: u16 string to be converted
651 * @n: size of target buffer
653 static void gpt_convert_efi_name_to_char(char *s, void *es, int n)
660 for (i = 0, j = 0; j < n; i += 2, j++) {
667 int gpt_verify_headers(struct blk_desc *dev_desc, gpt_header *gpt_head,
671 * This function validates AND
672 * fills in the GPT header and PTE
674 if (is_gpt_valid(dev_desc,
675 GPT_PRIMARY_PARTITION_TABLE_LBA,
676 gpt_head, gpt_pte) != 1) {
677 log_debug("Invalid GPT\n");
681 /* Free pte before allocating again */
685 * Check that the alternate_lba entry points to the last LBA
687 if (le64_to_cpu(gpt_head->alternate_lba) != (dev_desc->lba - 1)) {
688 log_debug("Misplaced Backup GPT\n");
692 if (is_gpt_valid(dev_desc, (dev_desc->lba - 1),
693 gpt_head, gpt_pte) != 1) {
694 log_debug("Invalid Backup GPT\n");
701 static void restore_primary_gpt_header(gpt_header *gpt_h, struct blk_desc *dev_desc)
706 /* recalculate the values for the Primary GPT Header */
707 val = le64_to_cpu(gpt_h->my_lba);
708 gpt_h->my_lba = gpt_h->alternate_lba;
709 gpt_h->alternate_lba = cpu_to_le64(val);
710 gpt_h->partition_entry_lba = cpu_to_le64(partition_entries_offset(dev_desc));
712 gpt_h->header_crc32 = 0;
714 calc_crc32 = efi_crc32((const unsigned char *)gpt_h,
715 le32_to_cpu(gpt_h->header_size));
716 gpt_h->header_crc32 = cpu_to_le32(calc_crc32);
719 static int write_one_gpt_table(struct blk_desc *dev_desc,
720 gpt_header *gpt_h, gpt_entry *gpt_e)
722 const int pte_blk_cnt = BLOCK_CNT((gpt_h->num_partition_entries
723 * sizeof(gpt_entry)), dev_desc);
727 start = le64_to_cpu(gpt_h->my_lba);
728 if (blk_dwrite(dev_desc, start, 1, gpt_h) != 1) {
733 start = le64_to_cpu(gpt_h->partition_entry_lba);
734 if (blk_dwrite(dev_desc, start, pte_blk_cnt, gpt_e) != pte_blk_cnt) {
743 int gpt_repair_headers(struct blk_desc *dev_desc)
745 ALLOC_CACHE_ALIGN_BUFFER_PAD(gpt_header, gpt_h1, 1, dev_desc->blksz);
746 ALLOC_CACHE_ALIGN_BUFFER_PAD(gpt_header, gpt_h2, 1, dev_desc->blksz);
747 gpt_entry *gpt_e1 = NULL, *gpt_e2 = NULL;
748 int is_gpt1_valid, is_gpt2_valid;
751 is_gpt1_valid = is_gpt_valid(dev_desc, GPT_PRIMARY_PARTITION_TABLE_LBA,
753 is_gpt2_valid = is_gpt_valid(dev_desc, dev_desc->lba - 1,
756 if (is_gpt1_valid && is_gpt2_valid) {
761 if (is_gpt1_valid && !is_gpt2_valid) {
762 prepare_backup_gpt_header(gpt_h1);
763 ret = write_one_gpt_table(dev_desc, gpt_h1, gpt_e1);
767 if (!is_gpt1_valid && is_gpt2_valid) {
768 restore_primary_gpt_header(gpt_h2, dev_desc);
769 ret = write_one_gpt_table(dev_desc, gpt_h2, gpt_e2);
773 if (!is_gpt1_valid && !is_gpt2_valid) {
787 int gpt_verify_partitions(struct blk_desc *dev_desc,
788 struct disk_partition *partitions, int parts,
789 gpt_header *gpt_head, gpt_entry **gpt_pte)
791 char efi_str[PARTNAME_SZ + 1];
796 ret = gpt_verify_headers(dev_desc, gpt_head, gpt_pte);
802 for (i = 0; i < parts; i++) {
803 if (i == gpt_head->num_partition_entries) {
804 pr_err("More partitions than allowed!\n");
808 /* Check if GPT and ENV partition names match */
809 gpt_convert_efi_name_to_char(efi_str, gpt_e[i].partition_name,
812 debug("%s: part: %2d name - GPT: %16s, ENV: %16s ",
813 __func__, i, efi_str, partitions[i].name);
815 if (strncmp(efi_str, (char *)partitions[i].name,
816 sizeof(partitions->name))) {
817 pr_err("Partition name: %s does not match %s!\n",
818 efi_str, (char *)partitions[i].name);
822 /* Check if GPT and ENV sizes match */
823 gpt_part_size = le64_to_cpu(gpt_e[i].ending_lba) -
824 le64_to_cpu(gpt_e[i].starting_lba) + 1;
825 debug("size(LBA) - GPT: %8llu, ENV: %8llu ",
826 (unsigned long long)gpt_part_size,
827 (unsigned long long)partitions[i].size);
829 if (le64_to_cpu(gpt_part_size) != partitions[i].size) {
830 /* We do not check the extend partition size */
831 if ((i == parts - 1) && (partitions[i].size == 0))
834 pr_err("Partition %s size: %llu does not match %llu!\n",
835 efi_str, (unsigned long long)gpt_part_size,
836 (unsigned long long)partitions[i].size);
841 * Start address is optional - check only if provided
842 * in '$partition' variable
844 if (!partitions[i].start) {
849 /* Check if GPT and ENV start LBAs match */
850 debug("start LBA - GPT: %8llu, ENV: %8llu\n",
851 le64_to_cpu(gpt_e[i].starting_lba),
852 (unsigned long long)partitions[i].start);
854 if (le64_to_cpu(gpt_e[i].starting_lba) != partitions[i].start) {
855 pr_err("Partition %s start: %llu does not match %llu!\n",
856 efi_str, le64_to_cpu(gpt_e[i].starting_lba),
857 (unsigned long long)partitions[i].start);
865 int is_valid_gpt_buf(struct blk_desc *dev_desc, void *buf)
870 /* determine start of GPT Header in the buffer */
871 gpt_h = buf + (GPT_PRIMARY_PARTITION_TABLE_LBA *
873 if (validate_gpt_header(gpt_h, GPT_PRIMARY_PARTITION_TABLE_LBA,
877 /* determine start of GPT Entries in the buffer */
878 gpt_e = buf + (le64_to_cpu(gpt_h->partition_entry_lba) *
880 if (validate_gpt_entries(gpt_h, gpt_e))
886 int write_mbr_and_gpt_partitions(struct blk_desc *dev_desc, void *buf)
894 if (is_valid_gpt_buf(dev_desc, buf))
897 /* determine start of GPT Header in the buffer */
898 gpt_h = buf + (GPT_PRIMARY_PARTITION_TABLE_LBA *
901 /* determine start of GPT Entries in the buffer */
902 gpt_e = buf + (le64_to_cpu(gpt_h->partition_entry_lba) *
904 gpt_e_blk_cnt = BLOCK_CNT((le32_to_cpu(gpt_h->num_partition_entries) *
905 le32_to_cpu(gpt_h->sizeof_partition_entry)),
909 lba = 0; /* MBR is always at 0 */
910 cnt = 1; /* MBR (1 block) */
911 if (blk_dwrite(dev_desc, lba, cnt, buf) != cnt) {
912 log_debug("failed writing '%s' (%d blks at 0x" LBAF ")\n",
917 /* write Primary GPT */
918 lba = GPT_PRIMARY_PARTITION_TABLE_LBA;
919 cnt = 1; /* GPT Header (1 block) */
920 if (blk_dwrite(dev_desc, lba, cnt, gpt_h) != cnt) {
921 log_debug("failed writing '%s' (%d blks at 0x" LBAF ")\n",
922 "Primary GPT Header", cnt, lba);
926 lba = le64_to_cpu(gpt_h->partition_entry_lba);
928 if (blk_dwrite(dev_desc, lba, cnt, gpt_e) != cnt) {
929 log_debug("failed writing '%s' (%d blks at 0x" LBAF ")\n",
930 "Primary GPT Entries", cnt, lba);
934 prepare_backup_gpt_header(gpt_h);
936 /* write Backup GPT */
937 lba = le64_to_cpu(gpt_h->partition_entry_lba);
939 if (blk_dwrite(dev_desc, lba, cnt, gpt_e) != cnt) {
940 log_debug("failed writing '%s' (%d blks at 0x" LBAF ")\n",
941 "Backup GPT Entries", cnt, lba);
945 lba = le64_to_cpu(gpt_h->my_lba);
946 cnt = 1; /* GPT Header (1 block) */
947 if (blk_dwrite(dev_desc, lba, cnt, gpt_h) != cnt) {
948 log_debug("failed writing '%s' (%d blks at 0x" LBAF ")\n",
949 "Backup GPT Header", cnt, lba);
953 /* Update the partition table entries*/
964 * pmbr_part_valid(): Check for EFI partition signature
966 * Returns: 1 if EFI GPT partition type is found.
968 static int pmbr_part_valid(struct partition *part)
970 if (part->sys_ind == EFI_PMBR_OSTYPE_EFI_GPT &&
971 get_unaligned_le32(&part->start_sect) == 1UL) {
979 * is_pmbr_valid(): test Protective MBR for validity
981 * Returns: 1 if PMBR is valid, 0 otherwise.
982 * Validity depends on two things:
983 * 1) MSDOS signature is in the last two bytes of the MBR
984 * 2) One partition of type 0xEE is found, checked by pmbr_part_valid()
986 static int is_pmbr_valid(legacy_mbr * mbr)
990 if (!mbr || le16_to_cpu(mbr->signature) != MSDOS_MBR_SIGNATURE)
993 for (i = 0; i < 4; i++) {
994 if (pmbr_part_valid(&mbr->partition_record[i])) {
1002 * is_gpt_valid() - tests one GPT header and PTEs for validity
1004 * lba is the logical block address of the GPT header to test
1005 * gpt is a GPT header ptr, filled on return.
1006 * ptes is a PTEs ptr, filled on return.
1008 * Description: returns 1 if valid, 0 on error, 2 if ignored header
1009 * If valid, returns pointers to PTEs.
1011 static int is_gpt_valid(struct blk_desc *dev_desc, u64 lba,
1012 gpt_header *pgpt_head, gpt_entry **pgpt_pte)
1014 /* Confirm valid arguments prior to allocation. */
1015 if (!dev_desc || !pgpt_head) {
1016 log_debug("Invalid Argument(s)\n");
1020 ALLOC_CACHE_ALIGN_BUFFER_PAD(legacy_mbr, mbr, 1, dev_desc->blksz);
1022 /* Read MBR Header from device */
1023 if (blk_dread(dev_desc, 0, 1, (ulong *)mbr) != 1) {
1024 log_debug("Can't read MBR header\n");
1028 /* Read GPT Header from device */
1029 if (blk_dread(dev_desc, (lbaint_t)lba, 1, pgpt_head) != 1) {
1030 log_debug("Can't read GPT header\n");
1034 /* Invalid but nothing to yell about. */
1035 if (le64_to_cpu(pgpt_head->signature) == GPT_HEADER_CHROMEOS_IGNORE) {
1036 log_debug("ChromeOS 'IGNOREME' GPT header found and ignored\n");
1040 if (validate_gpt_header(pgpt_head, (lbaint_t)lba, dev_desc->lba))
1043 if (dev_desc->sig_type == SIG_TYPE_NONE) {
1044 efi_guid_t empty = {};
1045 if (memcmp(&pgpt_head->disk_guid, &empty, sizeof(empty))) {
1046 dev_desc->sig_type = SIG_TYPE_GUID;
1047 memcpy(&dev_desc->guid_sig, &pgpt_head->disk_guid,
1049 } else if (mbr->unique_mbr_signature != 0) {
1050 dev_desc->sig_type = SIG_TYPE_MBR;
1051 dev_desc->mbr_sig = mbr->unique_mbr_signature;
1055 /* Read and allocate Partition Table Entries */
1056 *pgpt_pte = alloc_read_gpt_entries(dev_desc, pgpt_head);
1060 if (validate_gpt_entries(pgpt_head, *pgpt_pte)) {
1065 /* We're done, all's well */
1070 * find_valid_gpt() - finds a valid GPT header and PTEs
1072 * gpt is a GPT header ptr, filled on return.
1073 * ptes is a PTEs ptr, filled on return.
1075 * Description: returns 1 if found a valid gpt, 0 on error.
1076 * If valid, returns pointers to PTEs.
1078 static int find_valid_gpt(struct blk_desc *dev_desc, gpt_header *gpt_head,
1079 gpt_entry **pgpt_pte)
1083 r = is_gpt_valid(dev_desc, GPT_PRIMARY_PARTITION_TABLE_LBA, gpt_head,
1088 log_debug("Invalid GPT\n");
1090 if (is_gpt_valid(dev_desc, (dev_desc->lba - 1), gpt_head,
1092 log_debug("Invalid Backup GPT\n");
1096 log_debug(" Using Backup GPT\n");
1102 * alloc_read_gpt_entries(): reads partition entries from disk
1106 * Description: Returns ptes on success, NULL on error.
1107 * Allocates space for PTEs based on information found in @gpt.
1108 * Notes: remember to free pte when you're done!
1110 static gpt_entry *alloc_read_gpt_entries(struct blk_desc *dev_desc,
1111 gpt_header *pgpt_head)
1113 size_t count = 0, blk_cnt;
1115 gpt_entry *pte = NULL;
1117 if (!dev_desc || !pgpt_head) {
1118 log_debug("Invalid Argument(s)\n");
1122 count = le32_to_cpu(pgpt_head->num_partition_entries) *
1123 le32_to_cpu(pgpt_head->sizeof_partition_entry);
1125 log_debug("count = %u * %u = %lu\n",
1126 (u32)le32_to_cpu(pgpt_head->num_partition_entries),
1127 (u32)le32_to_cpu(pgpt_head->sizeof_partition_entry),
1130 /* Allocate memory for PTE, remember to FREE */
1132 pte = memalign(ARCH_DMA_MINALIGN,
1133 PAD_TO_BLOCKSIZE(count, dev_desc));
1136 if (count == 0 || pte == NULL) {
1137 log_debug("ERROR: Can't allocate %#lX bytes for GPT Entries\n",
1142 /* Read GPT Entries from device */
1143 blk = le64_to_cpu(pgpt_head->partition_entry_lba);
1144 blk_cnt = BLOCK_CNT(count, dev_desc);
1145 if (blk_dread(dev_desc, blk, (lbaint_t)blk_cnt, pte) != blk_cnt) {
1146 log_debug("Can't read GPT Entries\n");
1154 * is_pte_valid(): validates a single Partition Table Entry
1155 * @gpt_entry - Pointer to a single Partition Table Entry
1157 * Description: returns 1 if valid, 0 on error.
1159 static int is_pte_valid(gpt_entry * pte)
1161 efi_guid_t unused_guid;
1164 log_debug("Invalid Argument(s)\n");
1168 /* Only one validation for now:
1169 * The GUID Partition Type != Unused Entry (ALL-ZERO)
1171 memset(unused_guid.b, 0, sizeof(unused_guid.b));
1173 if (memcmp(pte->partition_type_guid.b, unused_guid.b,
1174 sizeof(unused_guid.b)) == 0) {
1176 log_debug("Found an unused PTE GUID at 0x%08X\n",
1177 (unsigned int)(uintptr_t)pte);
1186 * Add an 'a_' prefix so it comes before 'dos' in the linker list. We need to
1187 * check EFI first, since a DOS partition is often used as a 'protective MBR'
1190 U_BOOT_PART_TYPE(a_efi) = {
1192 .part_type = PART_TYPE_EFI,
1193 .max_entries = GPT_ENTRY_NUMBERS,
1194 .get_info = part_get_info_ptr(part_get_info_efi),
1195 .print = part_print_ptr(part_print_efi),
1196 .test = part_test_efi,