1 // SPDX-License-Identifier: GPL-2.0+
3 * Copyright (C) 2008 RuggedCom, Inc.
4 * Richard Retanubun <RichardRetanubun@RuggedCom.com>
9 * when CONFIG_SYS_64BIT_LBA is not defined, lbaint_t is 32 bits; this
10 * limits the maximum size of addressable storage to < 2 Terra Bytes
12 #include <asm/unaligned.h>
20 #include <linux/compiler.h>
21 #include <linux/ctype.h>
23 DECLARE_GLOBAL_DATA_PTR;
26 * GUID for basic data partions.
28 static const efi_guid_t partition_basic_data_guid = PARTITION_BASIC_DATA_GUID;
30 #ifdef CONFIG_HAVE_BLOCK_DEVICE
32 * efi_crc32() - EFI version of crc32 function
33 * @buf: buffer to calculate crc32 of
34 * @len - length of buf
36 * Description: Returns EFI-style CRC32 value for @buf
38 static inline u32 efi_crc32(const void *buf, u32 len)
40 return crc32(0, buf, len);
44 * Private function prototypes
47 static int pmbr_part_valid(struct partition *part);
48 static int is_pmbr_valid(legacy_mbr * mbr);
49 static int is_gpt_valid(struct blk_desc *dev_desc, u64 lba,
50 gpt_header *pgpt_head, gpt_entry **pgpt_pte);
51 static gpt_entry *alloc_read_gpt_entries(struct blk_desc *dev_desc,
52 gpt_header *pgpt_head);
53 static int is_pte_valid(gpt_entry * pte);
54 static int find_valid_gpt(struct blk_desc *dev_desc, gpt_header *gpt_head,
55 gpt_entry **pgpt_pte);
57 static char *print_efiname(gpt_entry *pte)
59 static char name[PARTNAME_SZ + 1];
61 for (i = 0; i < PARTNAME_SZ; i++) {
63 c = pte->partition_name[i] & 0xff;
64 c = (c && !isprint(c)) ? '.' : c;
67 name[PARTNAME_SZ] = 0;
71 static const efi_guid_t system_guid = PARTITION_SYSTEM_GUID;
73 static inline int is_bootable(gpt_entry *p)
75 return p->attributes.fields.legacy_bios_bootable ||
76 !memcmp(&(p->partition_type_guid), &system_guid,
80 static int validate_gpt_header(gpt_header *gpt_h, lbaint_t lba,
83 uint32_t crc32_backup = 0;
86 /* Check the GPT header signature */
87 if (le64_to_cpu(gpt_h->signature) != GPT_HEADER_SIGNATURE_UBOOT) {
88 printf("%s signature is wrong: 0x%llX != 0x%llX\n",
89 "GUID Partition Table Header",
90 le64_to_cpu(gpt_h->signature),
91 GPT_HEADER_SIGNATURE_UBOOT);
95 /* Check the GUID Partition Table CRC */
96 memcpy(&crc32_backup, &gpt_h->header_crc32, sizeof(crc32_backup));
97 memset(&gpt_h->header_crc32, 0, sizeof(gpt_h->header_crc32));
99 calc_crc32 = efi_crc32((const unsigned char *)gpt_h,
100 le32_to_cpu(gpt_h->header_size));
102 memcpy(&gpt_h->header_crc32, &crc32_backup, sizeof(crc32_backup));
104 if (calc_crc32 != le32_to_cpu(crc32_backup)) {
105 printf("%s CRC is wrong: 0x%x != 0x%x\n",
106 "GUID Partition Table Header",
107 le32_to_cpu(crc32_backup), calc_crc32);
112 * Check that the my_lba entry points to the LBA that contains the GPT
114 if (le64_to_cpu(gpt_h->my_lba) != lba) {
115 printf("GPT: my_lba incorrect: %llX != " LBAF "\n",
116 le64_to_cpu(gpt_h->my_lba),
122 * Check that the first_usable_lba and that the last_usable_lba are
125 if (le64_to_cpu(gpt_h->first_usable_lba) > lastlba) {
126 printf("GPT: first_usable_lba incorrect: %llX > " LBAF "\n",
127 le64_to_cpu(gpt_h->first_usable_lba), lastlba);
130 if (le64_to_cpu(gpt_h->last_usable_lba) > lastlba) {
131 printf("GPT: last_usable_lba incorrect: %llX > " LBAF "\n",
132 le64_to_cpu(gpt_h->last_usable_lba), lastlba);
136 debug("GPT: first_usable_lba: %llX last_usable_lba: %llX last lba: "
137 LBAF "\n", le64_to_cpu(gpt_h->first_usable_lba),
138 le64_to_cpu(gpt_h->last_usable_lba), lastlba);
143 static int validate_gpt_entries(gpt_header *gpt_h, gpt_entry *gpt_e)
147 /* Check the GUID Partition Table Entry Array CRC */
148 calc_crc32 = efi_crc32((const unsigned char *)gpt_e,
149 le32_to_cpu(gpt_h->num_partition_entries) *
150 le32_to_cpu(gpt_h->sizeof_partition_entry));
152 if (calc_crc32 != le32_to_cpu(gpt_h->partition_entry_array_crc32)) {
153 printf("%s: 0x%x != 0x%x\n",
154 "GUID Partition Table Entry Array CRC is wrong",
155 le32_to_cpu(gpt_h->partition_entry_array_crc32),
163 static void prepare_backup_gpt_header(gpt_header *gpt_h)
168 /* recalculate the values for the Backup GPT Header */
169 val = le64_to_cpu(gpt_h->my_lba);
170 gpt_h->my_lba = gpt_h->alternate_lba;
171 gpt_h->alternate_lba = cpu_to_le64(val);
172 gpt_h->partition_entry_lba =
173 cpu_to_le64(le64_to_cpu(gpt_h->last_usable_lba) + 1);
174 gpt_h->header_crc32 = 0;
176 calc_crc32 = efi_crc32((const unsigned char *)gpt_h,
177 le32_to_cpu(gpt_h->header_size));
178 gpt_h->header_crc32 = cpu_to_le32(calc_crc32);
181 #if CONFIG_IS_ENABLED(EFI_PARTITION)
183 * Public Functions (include/part.h)
187 * UUID is displayed as 32 hexadecimal digits, in 5 groups,
188 * separated by hyphens, in the form 8-4-4-4-12 for a total of 36 characters
190 int get_disk_guid(struct blk_desc * dev_desc, char *guid)
192 ALLOC_CACHE_ALIGN_BUFFER_PAD(gpt_header, gpt_head, 1, dev_desc->blksz);
193 gpt_entry *gpt_pte = NULL;
194 unsigned char *guid_bin;
196 /* This function validates AND fills in the GPT header and PTE */
197 if (find_valid_gpt(dev_desc, gpt_head, &gpt_pte) != 1)
200 guid_bin = gpt_head->disk_guid.b;
201 uuid_bin_to_str(guid_bin, guid, UUID_STR_FORMAT_GUID);
203 /* Remember to free pte */
208 void part_print_efi(struct blk_desc *dev_desc)
210 ALLOC_CACHE_ALIGN_BUFFER_PAD(gpt_header, gpt_head, 1, dev_desc->blksz);
211 gpt_entry *gpt_pte = NULL;
213 char uuid[UUID_STR_LEN + 1];
214 unsigned char *uuid_bin;
216 /* This function validates AND fills in the GPT header and PTE */
217 if (find_valid_gpt(dev_desc, gpt_head, &gpt_pte) != 1)
220 debug("%s: gpt-entry at %p\n", __func__, gpt_pte);
222 printf("Part\tStart LBA\tEnd LBA\t\tName\n");
223 printf("\tAttributes\n");
224 printf("\tType GUID\n");
225 printf("\tPartition GUID\n");
227 for (i = 0; i < le32_to_cpu(gpt_head->num_partition_entries); i++) {
228 /* Stop at the first non valid PTE */
229 if (!is_pte_valid(&gpt_pte[i]))
232 printf("%3d\t0x%08llx\t0x%08llx\t\"%s\"\n", (i + 1),
233 le64_to_cpu(gpt_pte[i].starting_lba),
234 le64_to_cpu(gpt_pte[i].ending_lba),
235 print_efiname(&gpt_pte[i]));
236 printf("\tattrs:\t0x%016llx\n", gpt_pte[i].attributes.raw);
237 uuid_bin = (unsigned char *)gpt_pte[i].partition_type_guid.b;
238 uuid_bin_to_str(uuid_bin, uuid, UUID_STR_FORMAT_GUID);
239 printf("\ttype:\t%s\n", uuid);
240 #ifdef CONFIG_PARTITION_TYPE_GUID
241 if (!uuid_guid_get_str(uuid_bin, uuid))
242 printf("\ttype:\t%s\n", uuid);
244 uuid_bin = (unsigned char *)gpt_pte[i].unique_partition_guid.b;
245 uuid_bin_to_str(uuid_bin, uuid, UUID_STR_FORMAT_GUID);
246 printf("\tguid:\t%s\n", uuid);
249 /* Remember to free pte */
254 int part_get_info_efi(struct blk_desc *dev_desc, int part,
255 disk_partition_t *info)
257 ALLOC_CACHE_ALIGN_BUFFER_PAD(gpt_header, gpt_head, 1, dev_desc->blksz);
258 gpt_entry *gpt_pte = NULL;
260 /* "part" argument must be at least 1 */
262 printf("%s: Invalid Argument(s)\n", __func__);
266 /* This function validates AND fills in the GPT header and PTE */
267 if (find_valid_gpt(dev_desc, gpt_head, &gpt_pte) != 1)
270 if (part > le32_to_cpu(gpt_head->num_partition_entries) ||
271 !is_pte_valid(&gpt_pte[part - 1])) {
272 debug("%s: *** ERROR: Invalid partition number %d ***\n",
278 /* The 'lbaint_t' casting may limit the maximum disk size to 2 TB */
279 info->start = (lbaint_t)le64_to_cpu(gpt_pte[part - 1].starting_lba);
280 /* The ending LBA is inclusive, to calculate size, add 1 to it */
281 info->size = (lbaint_t)le64_to_cpu(gpt_pte[part - 1].ending_lba) + 1
283 info->blksz = dev_desc->blksz;
285 snprintf((char *)info->name, sizeof(info->name), "%s",
286 print_efiname(&gpt_pte[part - 1]));
287 strcpy((char *)info->type, "U-Boot");
288 info->bootable = is_bootable(&gpt_pte[part - 1]);
289 #if CONFIG_IS_ENABLED(PARTITION_UUIDS)
290 uuid_bin_to_str(gpt_pte[part - 1].unique_partition_guid.b, info->uuid,
291 UUID_STR_FORMAT_GUID);
293 #ifdef CONFIG_PARTITION_TYPE_GUID
294 uuid_bin_to_str(gpt_pte[part - 1].partition_type_guid.b,
295 info->type_guid, UUID_STR_FORMAT_GUID);
298 debug("%s: start 0x" LBAF ", size 0x" LBAF ", name %s\n", __func__,
299 info->start, info->size, info->name);
301 /* Remember to free pte */
306 static int part_test_efi(struct blk_desc *dev_desc)
308 ALLOC_CACHE_ALIGN_BUFFER_PAD(legacy_mbr, legacymbr, 1, dev_desc->blksz);
310 /* Read legacy MBR from block 0 and validate it */
311 if ((blk_dread(dev_desc, 0, 1, (ulong *)legacymbr) != 1)
312 || (is_pmbr_valid(legacymbr) != 1)) {
319 * set_protective_mbr(): Set the EFI protective MBR
320 * @param dev_desc - block device descriptor
322 * @return - zero on success, otherwise error
324 static int set_protective_mbr(struct blk_desc *dev_desc)
326 /* Setup the Protective MBR */
327 ALLOC_CACHE_ALIGN_BUFFER_PAD(legacy_mbr, p_mbr, 1, dev_desc->blksz);
329 printf("%s: calloc failed!\n", __func__);
333 /* Read MBR to backup boot code if it exists */
334 if (blk_dread(dev_desc, 0, 1, p_mbr) != 1) {
335 pr_err("** Can't read from device %d **\n", dev_desc->devnum);
339 /* Clear all data in MBR except of backed up boot code */
340 memset((char *)p_mbr + MSDOS_MBR_BOOT_CODE_SIZE, 0, sizeof(*p_mbr) -
341 MSDOS_MBR_BOOT_CODE_SIZE);
343 /* Append signature */
344 p_mbr->signature = MSDOS_MBR_SIGNATURE;
345 p_mbr->partition_record[0].sys_ind = EFI_PMBR_OSTYPE_EFI_GPT;
346 p_mbr->partition_record[0].start_sect = 1;
347 p_mbr->partition_record[0].nr_sects = (u32) dev_desc->lba - 1;
349 /* Write MBR sector to the MMC device */
350 if (blk_dwrite(dev_desc, 0, 1, p_mbr) != 1) {
351 printf("** Can't write to device %d **\n",
359 int write_gpt_table(struct blk_desc *dev_desc,
360 gpt_header *gpt_h, gpt_entry *gpt_e)
362 const int pte_blk_cnt = BLOCK_CNT((gpt_h->num_partition_entries
363 * sizeof(gpt_entry)), dev_desc);
366 debug("max lba: %x\n", (u32) dev_desc->lba);
367 /* Setup the Protective MBR */
368 if (set_protective_mbr(dev_desc) < 0)
371 /* Generate CRC for the Primary GPT Header */
372 calc_crc32 = efi_crc32((const unsigned char *)gpt_e,
373 le32_to_cpu(gpt_h->num_partition_entries) *
374 le32_to_cpu(gpt_h->sizeof_partition_entry));
375 gpt_h->partition_entry_array_crc32 = cpu_to_le32(calc_crc32);
377 calc_crc32 = efi_crc32((const unsigned char *)gpt_h,
378 le32_to_cpu(gpt_h->header_size));
379 gpt_h->header_crc32 = cpu_to_le32(calc_crc32);
381 /* Write the First GPT to the block right after the Legacy MBR */
382 if (blk_dwrite(dev_desc, 1, 1, gpt_h) != 1)
385 if (blk_dwrite(dev_desc, le64_to_cpu(gpt_h->partition_entry_lba),
386 pte_blk_cnt, gpt_e) != pte_blk_cnt)
389 prepare_backup_gpt_header(gpt_h);
391 if (blk_dwrite(dev_desc, (lbaint_t)le64_to_cpu(gpt_h->last_usable_lba)
392 + 1, pte_blk_cnt, gpt_e) != pte_blk_cnt)
395 if (blk_dwrite(dev_desc, (lbaint_t)le64_to_cpu(gpt_h->my_lba), 1,
399 debug("GPT successfully written to block device!\n");
403 printf("** Can't write to device %d **\n", dev_desc->devnum);
407 int gpt_fill_pte(struct blk_desc *dev_desc,
408 gpt_header *gpt_h, gpt_entry *gpt_e,
409 disk_partition_t *partitions, int parts)
411 lbaint_t offset = (lbaint_t)le64_to_cpu(gpt_h->first_usable_lba);
412 lbaint_t last_usable_lba = (lbaint_t)
413 le64_to_cpu(gpt_h->last_usable_lba);
415 size_t efiname_len, dosname_len;
416 #if CONFIG_IS_ENABLED(PARTITION_UUIDS)
418 unsigned char *bin_uuid;
420 #ifdef CONFIG_PARTITION_TYPE_GUID
422 unsigned char *bin_type_guid;
424 size_t hdr_start = gpt_h->my_lba;
425 size_t hdr_end = hdr_start + 1;
427 size_t pte_start = gpt_h->partition_entry_lba;
428 size_t pte_end = pte_start +
429 gpt_h->num_partition_entries * gpt_h->sizeof_partition_entry /
432 for (i = 0; i < parts; i++) {
433 /* partition starting lba */
434 lbaint_t start = partitions[i].start;
435 lbaint_t size = partitions[i].size;
438 offset = start + size;
445 * If our partition overlaps with either the GPT
446 * header, or the partition entry, reject it.
448 if (((start < hdr_end && hdr_start < (start + size)) ||
449 (start < pte_end && pte_start < (start + size)))) {
450 printf("Partition overlap\n");
454 gpt_e[i].starting_lba = cpu_to_le64(start);
456 if (offset > (last_usable_lba + 1)) {
457 printf("Partitions layout exceds disk size\n");
460 /* partition ending lba */
461 if ((i == parts - 1) && (size == 0))
462 /* extend the last partition to maximuim */
463 gpt_e[i].ending_lba = gpt_h->last_usable_lba;
465 gpt_e[i].ending_lba = cpu_to_le64(offset - 1);
467 #ifdef CONFIG_PARTITION_TYPE_GUID
468 str_type_guid = partitions[i].type_guid;
469 bin_type_guid = gpt_e[i].partition_type_guid.b;
470 if (strlen(str_type_guid)) {
471 if (uuid_str_to_bin(str_type_guid, bin_type_guid,
472 UUID_STR_FORMAT_GUID)) {
473 printf("Partition no. %d: invalid type guid: %s\n",
478 /* default partition type GUID */
479 memcpy(bin_type_guid,
480 &partition_basic_data_guid, 16);
483 /* partition type GUID */
484 memcpy(gpt_e[i].partition_type_guid.b,
485 &partition_basic_data_guid, 16);
488 #if CONFIG_IS_ENABLED(PARTITION_UUIDS)
489 str_uuid = partitions[i].uuid;
490 bin_uuid = gpt_e[i].unique_partition_guid.b;
492 if (uuid_str_to_bin(str_uuid, bin_uuid, UUID_STR_FORMAT_GUID)) {
493 printf("Partition no. %d: invalid guid: %s\n",
499 /* partition attributes */
500 memset(&gpt_e[i].attributes, 0,
501 sizeof(gpt_entry_attributes));
503 if (partitions[i].bootable)
504 gpt_e[i].attributes.fields.legacy_bios_bootable = 1;
507 efiname_len = sizeof(gpt_e[i].partition_name)
508 / sizeof(efi_char16_t);
509 dosname_len = sizeof(partitions[i].name);
511 memset(gpt_e[i].partition_name, 0,
512 sizeof(gpt_e[i].partition_name));
514 for (k = 0; k < min(dosname_len, efiname_len); k++)
515 gpt_e[i].partition_name[k] =
516 (efi_char16_t)(partitions[i].name[k]);
518 debug("%s: name: %s offset[%d]: 0x" LBAF
519 " size[%d]: 0x" LBAF "\n",
520 __func__, partitions[i].name, i,
527 static uint32_t partition_entries_offset(struct blk_desc *dev_desc)
529 uint32_t offset_blks = 2;
530 uint32_t __maybe_unused offset_bytes;
531 int __maybe_unused config_offset;
533 #if defined(CONFIG_EFI_PARTITION_ENTRIES_OFF)
535 * Some architectures require their SPL loader at a fixed
536 * address within the first 16KB of the disk. To avoid an
537 * overlap with the partition entries of the EFI partition
538 * table, the first safe offset (in bytes, from the start of
539 * the disk) for the entries can be set in
540 * CONFIG_EFI_PARTITION_ENTRIES_OFF.
543 PAD_TO_BLOCKSIZE(CONFIG_EFI_PARTITION_ENTRIES_OFF, dev_desc);
544 offset_blks = offset_bytes / dev_desc->blksz;
547 #if defined(CONFIG_OF_CONTROL)
549 * Allow the offset of the first partition entires (in bytes
550 * from the start of the device) to be specified as a property
551 * of the device tree '/config' node.
553 config_offset = fdtdec_get_config_int(gd->fdt_blob,
554 "u-boot,efi-partition-entries-offset",
556 if (config_offset != -EINVAL) {
557 offset_bytes = PAD_TO_BLOCKSIZE(config_offset, dev_desc);
558 offset_blks = offset_bytes / dev_desc->blksz;
562 debug("efi: partition entries offset (in blocks): %d\n", offset_blks);
565 * The earliest LBA this can be at is LBA#2 (i.e. right behind
566 * the (protective) MBR and the GPT header.
574 int gpt_fill_header(struct blk_desc *dev_desc, gpt_header *gpt_h,
575 char *str_guid, int parts_count)
577 gpt_h->signature = cpu_to_le64(GPT_HEADER_SIGNATURE_UBOOT);
578 gpt_h->revision = cpu_to_le32(GPT_HEADER_REVISION_V1);
579 gpt_h->header_size = cpu_to_le32(sizeof(gpt_header));
580 gpt_h->my_lba = cpu_to_le64(1);
581 gpt_h->alternate_lba = cpu_to_le64(dev_desc->lba - 1);
582 gpt_h->last_usable_lba = cpu_to_le64(dev_desc->lba - 34);
583 gpt_h->partition_entry_lba =
584 cpu_to_le64(partition_entries_offset(dev_desc));
585 gpt_h->first_usable_lba =
586 cpu_to_le64(le64_to_cpu(gpt_h->partition_entry_lba) + 32);
587 gpt_h->num_partition_entries = cpu_to_le32(GPT_ENTRY_NUMBERS);
588 gpt_h->sizeof_partition_entry = cpu_to_le32(sizeof(gpt_entry));
589 gpt_h->header_crc32 = 0;
590 gpt_h->partition_entry_array_crc32 = 0;
592 if (uuid_str_to_bin(str_guid, gpt_h->disk_guid.b, UUID_STR_FORMAT_GUID))
598 int gpt_restore(struct blk_desc *dev_desc, char *str_disk_guid,
599 disk_partition_t *partitions, int parts_count)
605 size = PAD_TO_BLOCKSIZE(sizeof(gpt_header), dev_desc);
606 gpt_h = malloc_cache_aligned(size);
608 printf("%s: calloc failed!\n", __func__);
611 memset(gpt_h, 0, size);
613 size = PAD_TO_BLOCKSIZE(GPT_ENTRY_NUMBERS * sizeof(gpt_entry),
615 gpt_e = malloc_cache_aligned(size);
617 printf("%s: calloc failed!\n", __func__);
621 memset(gpt_e, 0, size);
623 /* Generate Primary GPT header (LBA1) */
624 ret = gpt_fill_header(dev_desc, gpt_h, str_disk_guid, parts_count);
628 /* Generate partition entries */
629 ret = gpt_fill_pte(dev_desc, gpt_h, gpt_e, partitions, parts_count);
633 /* Write GPT partition table */
634 ret = write_gpt_table(dev_desc, gpt_h, gpt_e);
643 * gpt_convert_efi_name_to_char() - convert u16 string to char string
645 * TODO: this conversion only supports ANSI characters
648 * @es: u16 string to be converted
649 * @n: size of target buffer
651 static void gpt_convert_efi_name_to_char(char *s, void *es, int n)
658 for (i = 0, j = 0; j < n; i += 2, j++) {
665 int gpt_verify_headers(struct blk_desc *dev_desc, gpt_header *gpt_head,
669 * This function validates AND
670 * fills in the GPT header and PTE
672 if (is_gpt_valid(dev_desc,
673 GPT_PRIMARY_PARTITION_TABLE_LBA,
674 gpt_head, gpt_pte) != 1) {
675 printf("%s: *** ERROR: Invalid GPT ***\n",
680 /* Free pte before allocating again */
683 if (is_gpt_valid(dev_desc, (dev_desc->lba - 1),
684 gpt_head, gpt_pte) != 1) {
685 printf("%s: *** ERROR: Invalid Backup GPT ***\n",
693 int gpt_verify_partitions(struct blk_desc *dev_desc,
694 disk_partition_t *partitions, int parts,
695 gpt_header *gpt_head, gpt_entry **gpt_pte)
697 char efi_str[PARTNAME_SZ + 1];
702 ret = gpt_verify_headers(dev_desc, gpt_head, gpt_pte);
708 for (i = 0; i < parts; i++) {
709 if (i == gpt_head->num_partition_entries) {
710 pr_err("More partitions than allowed!\n");
714 /* Check if GPT and ENV partition names match */
715 gpt_convert_efi_name_to_char(efi_str, gpt_e[i].partition_name,
718 debug("%s: part: %2d name - GPT: %16s, ENV: %16s ",
719 __func__, i, efi_str, partitions[i].name);
721 if (strncmp(efi_str, (char *)partitions[i].name,
722 sizeof(partitions->name))) {
723 pr_err("Partition name: %s does not match %s!\n",
724 efi_str, (char *)partitions[i].name);
728 /* Check if GPT and ENV sizes match */
729 gpt_part_size = le64_to_cpu(gpt_e[i].ending_lba) -
730 le64_to_cpu(gpt_e[i].starting_lba) + 1;
731 debug("size(LBA) - GPT: %8llu, ENV: %8llu ",
732 (unsigned long long)gpt_part_size,
733 (unsigned long long)partitions[i].size);
735 if (le64_to_cpu(gpt_part_size) != partitions[i].size) {
736 /* We do not check the extend partition size */
737 if ((i == parts - 1) && (partitions[i].size == 0))
740 pr_err("Partition %s size: %llu does not match %llu!\n",
741 efi_str, (unsigned long long)gpt_part_size,
742 (unsigned long long)partitions[i].size);
747 * Start address is optional - check only if provided
748 * in '$partition' variable
750 if (!partitions[i].start) {
755 /* Check if GPT and ENV start LBAs match */
756 debug("start LBA - GPT: %8llu, ENV: %8llu\n",
757 le64_to_cpu(gpt_e[i].starting_lba),
758 (unsigned long long)partitions[i].start);
760 if (le64_to_cpu(gpt_e[i].starting_lba) != partitions[i].start) {
761 pr_err("Partition %s start: %llu does not match %llu!\n",
762 efi_str, le64_to_cpu(gpt_e[i].starting_lba),
763 (unsigned long long)partitions[i].start);
771 int is_valid_gpt_buf(struct blk_desc *dev_desc, void *buf)
776 /* determine start of GPT Header in the buffer */
777 gpt_h = buf + (GPT_PRIMARY_PARTITION_TABLE_LBA *
779 if (validate_gpt_header(gpt_h, GPT_PRIMARY_PARTITION_TABLE_LBA,
783 /* determine start of GPT Entries in the buffer */
784 gpt_e = buf + (le64_to_cpu(gpt_h->partition_entry_lba) *
786 if (validate_gpt_entries(gpt_h, gpt_e))
792 int write_mbr_and_gpt_partitions(struct blk_desc *dev_desc, void *buf)
800 if (is_valid_gpt_buf(dev_desc, buf))
803 /* determine start of GPT Header in the buffer */
804 gpt_h = buf + (GPT_PRIMARY_PARTITION_TABLE_LBA *
807 /* determine start of GPT Entries in the buffer */
808 gpt_e = buf + (le64_to_cpu(gpt_h->partition_entry_lba) *
810 gpt_e_blk_cnt = BLOCK_CNT((le32_to_cpu(gpt_h->num_partition_entries) *
811 le32_to_cpu(gpt_h->sizeof_partition_entry)),
815 lba = 0; /* MBR is always at 0 */
816 cnt = 1; /* MBR (1 block) */
817 if (blk_dwrite(dev_desc, lba, cnt, buf) != cnt) {
818 printf("%s: failed writing '%s' (%d blks at 0x" LBAF ")\n",
819 __func__, "MBR", cnt, lba);
823 /* write Primary GPT */
824 lba = GPT_PRIMARY_PARTITION_TABLE_LBA;
825 cnt = 1; /* GPT Header (1 block) */
826 if (blk_dwrite(dev_desc, lba, cnt, gpt_h) != cnt) {
827 printf("%s: failed writing '%s' (%d blks at 0x" LBAF ")\n",
828 __func__, "Primary GPT Header", cnt, lba);
832 lba = le64_to_cpu(gpt_h->partition_entry_lba);
834 if (blk_dwrite(dev_desc, lba, cnt, gpt_e) != cnt) {
835 printf("%s: failed writing '%s' (%d blks at 0x" LBAF ")\n",
836 __func__, "Primary GPT Entries", cnt, lba);
840 prepare_backup_gpt_header(gpt_h);
842 /* write Backup GPT */
843 lba = le64_to_cpu(gpt_h->partition_entry_lba);
845 if (blk_dwrite(dev_desc, lba, cnt, gpt_e) != cnt) {
846 printf("%s: failed writing '%s' (%d blks at 0x" LBAF ")\n",
847 __func__, "Backup GPT Entries", cnt, lba);
851 lba = le64_to_cpu(gpt_h->my_lba);
852 cnt = 1; /* GPT Header (1 block) */
853 if (blk_dwrite(dev_desc, lba, cnt, gpt_h) != cnt) {
854 printf("%s: failed writing '%s' (%d blks at 0x" LBAF ")\n",
855 __func__, "Backup GPT Header", cnt, lba);
867 * pmbr_part_valid(): Check for EFI partition signature
869 * Returns: 1 if EFI GPT partition type is found.
871 static int pmbr_part_valid(struct partition *part)
873 if (part->sys_ind == EFI_PMBR_OSTYPE_EFI_GPT &&
874 get_unaligned_le32(&part->start_sect) == 1UL) {
882 * is_pmbr_valid(): test Protective MBR for validity
884 * Returns: 1 if PMBR is valid, 0 otherwise.
885 * Validity depends on two things:
886 * 1) MSDOS signature is in the last two bytes of the MBR
887 * 2) One partition of type 0xEE is found, checked by pmbr_part_valid()
889 static int is_pmbr_valid(legacy_mbr * mbr)
893 if (!mbr || le16_to_cpu(mbr->signature) != MSDOS_MBR_SIGNATURE)
896 for (i = 0; i < 4; i++) {
897 if (pmbr_part_valid(&mbr->partition_record[i])) {
905 * is_gpt_valid() - tests one GPT header and PTEs for validity
907 * lba is the logical block address of the GPT header to test
908 * gpt is a GPT header ptr, filled on return.
909 * ptes is a PTEs ptr, filled on return.
911 * Description: returns 1 if valid, 0 on error, 2 if ignored header
912 * If valid, returns pointers to PTEs.
914 static int is_gpt_valid(struct blk_desc *dev_desc, u64 lba,
915 gpt_header *pgpt_head, gpt_entry **pgpt_pte)
917 /* Confirm valid arguments prior to allocation. */
918 if (!dev_desc || !pgpt_head) {
919 printf("%s: Invalid Argument(s)\n", __func__);
923 ALLOC_CACHE_ALIGN_BUFFER_PAD(legacy_mbr, mbr, 1, dev_desc->blksz);
925 /* Read MBR Header from device */
926 if (blk_dread(dev_desc, 0, 1, (ulong *)mbr) != 1) {
927 printf("*** ERROR: Can't read MBR header ***\n");
931 /* Read GPT Header from device */
932 if (blk_dread(dev_desc, (lbaint_t)lba, 1, pgpt_head) != 1) {
933 printf("*** ERROR: Can't read GPT header ***\n");
937 /* Invalid but nothing to yell about. */
938 if (le64_to_cpu(pgpt_head->signature) == GPT_HEADER_CHROMEOS_IGNORE) {
939 debug("ChromeOS 'IGNOREME' GPT header found and ignored\n");
943 if (validate_gpt_header(pgpt_head, (lbaint_t)lba, dev_desc->lba))
946 if (dev_desc->sig_type == SIG_TYPE_NONE) {
947 efi_guid_t empty = {};
948 if (memcmp(&pgpt_head->disk_guid, &empty, sizeof(empty))) {
949 dev_desc->sig_type = SIG_TYPE_GUID;
950 memcpy(&dev_desc->guid_sig, &pgpt_head->disk_guid,
952 } else if (mbr->unique_mbr_signature != 0) {
953 dev_desc->sig_type = SIG_TYPE_MBR;
954 dev_desc->mbr_sig = mbr->unique_mbr_signature;
958 /* Read and allocate Partition Table Entries */
959 *pgpt_pte = alloc_read_gpt_entries(dev_desc, pgpt_head);
960 if (*pgpt_pte == NULL) {
961 printf("GPT: Failed to allocate memory for PTE\n");
965 if (validate_gpt_entries(pgpt_head, *pgpt_pte)) {
970 /* We're done, all's well */
975 * find_valid_gpt() - finds a valid GPT header and PTEs
977 * gpt is a GPT header ptr, filled on return.
978 * ptes is a PTEs ptr, filled on return.
980 * Description: returns 1 if found a valid gpt, 0 on error.
981 * If valid, returns pointers to PTEs.
983 static int find_valid_gpt(struct blk_desc *dev_desc, gpt_header *gpt_head,
984 gpt_entry **pgpt_pte)
988 r = is_gpt_valid(dev_desc, GPT_PRIMARY_PARTITION_TABLE_LBA, gpt_head,
993 printf("%s: *** ERROR: Invalid GPT ***\n", __func__);
995 if (is_gpt_valid(dev_desc, (dev_desc->lba - 1), gpt_head,
997 printf("%s: *** ERROR: Invalid Backup GPT ***\n",
1002 printf("%s: *** Using Backup GPT ***\n",
1009 * alloc_read_gpt_entries(): reads partition entries from disk
1013 * Description: Returns ptes on success, NULL on error.
1014 * Allocates space for PTEs based on information found in @gpt.
1015 * Notes: remember to free pte when you're done!
1017 static gpt_entry *alloc_read_gpt_entries(struct blk_desc *dev_desc,
1018 gpt_header *pgpt_head)
1020 size_t count = 0, blk_cnt;
1022 gpt_entry *pte = NULL;
1024 if (!dev_desc || !pgpt_head) {
1025 printf("%s: Invalid Argument(s)\n", __func__);
1029 count = le32_to_cpu(pgpt_head->num_partition_entries) *
1030 le32_to_cpu(pgpt_head->sizeof_partition_entry);
1032 debug("%s: count = %u * %u = %lu\n", __func__,
1033 (u32) le32_to_cpu(pgpt_head->num_partition_entries),
1034 (u32) le32_to_cpu(pgpt_head->sizeof_partition_entry),
1037 /* Allocate memory for PTE, remember to FREE */
1039 pte = memalign(ARCH_DMA_MINALIGN,
1040 PAD_TO_BLOCKSIZE(count, dev_desc));
1043 if (count == 0 || pte == NULL) {
1044 printf("%s: ERROR: Can't allocate %#lX bytes for GPT Entries\n",
1045 __func__, (ulong)count);
1049 /* Read GPT Entries from device */
1050 blk = le64_to_cpu(pgpt_head->partition_entry_lba);
1051 blk_cnt = BLOCK_CNT(count, dev_desc);
1052 if (blk_dread(dev_desc, blk, (lbaint_t)blk_cnt, pte) != blk_cnt) {
1053 printf("*** ERROR: Can't read GPT Entries ***\n");
1061 * is_pte_valid(): validates a single Partition Table Entry
1062 * @gpt_entry - Pointer to a single Partition Table Entry
1064 * Description: returns 1 if valid, 0 on error.
1066 static int is_pte_valid(gpt_entry * pte)
1068 efi_guid_t unused_guid;
1071 printf("%s: Invalid Argument(s)\n", __func__);
1075 /* Only one validation for now:
1076 * The GUID Partition Type != Unused Entry (ALL-ZERO)
1078 memset(unused_guid.b, 0, sizeof(unused_guid.b));
1080 if (memcmp(pte->partition_type_guid.b, unused_guid.b,
1081 sizeof(unused_guid.b)) == 0) {
1083 debug("%s: Found an unused PTE GUID at 0x%08X\n", __func__,
1084 (unsigned int)(uintptr_t)pte);
1093 * Add an 'a_' prefix so it comes before 'dos' in the linker list. We need to
1094 * check EFI first, since a DOS partition is often used as a 'protective MBR'
1097 U_BOOT_PART_TYPE(a_efi) = {
1099 .part_type = PART_TYPE_EFI,
1100 .max_entries = GPT_ENTRY_NUMBERS,
1101 .get_info = part_get_info_ptr(part_get_info_efi),
1102 .print = part_print_ptr(part_print_efi),
1103 .test = part_test_efi,