2 * Copyright (C) 2008 RuggedCom, Inc.
3 * Richard Retanubun <RichardRetanubun@RuggedCom.com>
5 * SPDX-License-Identifier: GPL-2.0+
10 * when CONFIG_SYS_64BIT_LBA is not defined, lbaint_t is 32 bits; this
11 * limits the maximum size of addressable storage to < 2 Terra Bytes
13 #include <asm/unaligned.h>
22 #include <linux/compiler.h>
23 #include <linux/ctype.h>
25 DECLARE_GLOBAL_DATA_PTR
;
27 #ifdef HAVE_BLOCK_DEVICE
29 * efi_crc32() - EFI version of crc32 function
30 * @buf: buffer to calculate crc32 of
31 * @len - length of buf
33 * Description: Returns EFI-style CRC32 value for @buf
35 static inline u32
efi_crc32(const void *buf
, u32 len
)
37 return crc32(0, buf
, len
);
41 * Private function prototypes
44 static int pmbr_part_valid(struct partition
*part
);
45 static int is_pmbr_valid(legacy_mbr
* mbr
);
46 static int is_gpt_valid(struct blk_desc
*dev_desc
, u64 lba
,
47 gpt_header
*pgpt_head
, gpt_entry
**pgpt_pte
);
48 static gpt_entry
*alloc_read_gpt_entries(struct blk_desc
*dev_desc
,
49 gpt_header
*pgpt_head
);
50 static int is_pte_valid(gpt_entry
* pte
);
52 static char *print_efiname(gpt_entry
*pte
)
54 static char name
[PARTNAME_SZ
+ 1];
56 for (i
= 0; i
< PARTNAME_SZ
; i
++) {
58 c
= pte
->partition_name
[i
] & 0xff;
59 c
= (c
&& !isprint(c
)) ? '.' : c
;
62 name
[PARTNAME_SZ
] = 0;
66 static efi_guid_t system_guid
= PARTITION_SYSTEM_GUID
;
68 static inline int is_bootable(gpt_entry
*p
)
70 return p
->attributes
.fields
.legacy_bios_bootable
||
71 !memcmp(&(p
->partition_type_guid
), &system_guid
,
75 static int validate_gpt_header(gpt_header
*gpt_h
, lbaint_t lba
,
78 uint32_t crc32_backup
= 0;
81 /* Check the GPT header signature */
82 if (le64_to_cpu(gpt_h
->signature
) != GPT_HEADER_SIGNATURE
) {
83 printf("%s signature is wrong: 0x%llX != 0x%llX\n",
84 "GUID Partition Table Header",
85 le64_to_cpu(gpt_h
->signature
),
86 GPT_HEADER_SIGNATURE
);
90 /* Check the GUID Partition Table CRC */
91 memcpy(&crc32_backup
, &gpt_h
->header_crc32
, sizeof(crc32_backup
));
92 memset(&gpt_h
->header_crc32
, 0, sizeof(gpt_h
->header_crc32
));
94 calc_crc32
= efi_crc32((const unsigned char *)gpt_h
,
95 le32_to_cpu(gpt_h
->header_size
));
97 memcpy(&gpt_h
->header_crc32
, &crc32_backup
, sizeof(crc32_backup
));
99 if (calc_crc32
!= le32_to_cpu(crc32_backup
)) {
100 printf("%s CRC is wrong: 0x%x != 0x%x\n",
101 "GUID Partition Table Header",
102 le32_to_cpu(crc32_backup
), calc_crc32
);
107 * Check that the my_lba entry points to the LBA that contains the GPT
109 if (le64_to_cpu(gpt_h
->my_lba
) != lba
) {
110 printf("GPT: my_lba incorrect: %llX != " LBAF
"\n",
111 le64_to_cpu(gpt_h
->my_lba
),
117 * Check that the first_usable_lba and that the last_usable_lba are
120 if (le64_to_cpu(gpt_h
->first_usable_lba
) > lastlba
) {
121 printf("GPT: first_usable_lba incorrect: %llX > " LBAF
"\n",
122 le64_to_cpu(gpt_h
->first_usable_lba
), lastlba
);
125 if (le64_to_cpu(gpt_h
->last_usable_lba
) > lastlba
) {
126 printf("GPT: last_usable_lba incorrect: %llX > " LBAF
"\n",
127 le64_to_cpu(gpt_h
->last_usable_lba
), lastlba
);
131 debug("GPT: first_usable_lba: %llX last_usable_lba: %llX last lba: "
132 LBAF
"\n", le64_to_cpu(gpt_h
->first_usable_lba
),
133 le64_to_cpu(gpt_h
->last_usable_lba
), lastlba
);
138 static int validate_gpt_entries(gpt_header
*gpt_h
, gpt_entry
*gpt_e
)
142 /* Check the GUID Partition Table Entry Array CRC */
143 calc_crc32
= efi_crc32((const unsigned char *)gpt_e
,
144 le32_to_cpu(gpt_h
->num_partition_entries
) *
145 le32_to_cpu(gpt_h
->sizeof_partition_entry
));
147 if (calc_crc32
!= le32_to_cpu(gpt_h
->partition_entry_array_crc32
)) {
148 printf("%s: 0x%x != 0x%x\n",
149 "GUID Partition Table Entry Array CRC is wrong",
150 le32_to_cpu(gpt_h
->partition_entry_array_crc32
),
158 static void prepare_backup_gpt_header(gpt_header
*gpt_h
)
163 /* recalculate the values for the Backup GPT Header */
164 val
= le64_to_cpu(gpt_h
->my_lba
);
165 gpt_h
->my_lba
= gpt_h
->alternate_lba
;
166 gpt_h
->alternate_lba
= cpu_to_le64(val
);
167 gpt_h
->partition_entry_lba
=
168 cpu_to_le64(le64_to_cpu(gpt_h
->last_usable_lba
) + 1);
169 gpt_h
->header_crc32
= 0;
171 calc_crc32
= efi_crc32((const unsigned char *)gpt_h
,
172 le32_to_cpu(gpt_h
->header_size
));
173 gpt_h
->header_crc32
= cpu_to_le32(calc_crc32
);
176 #if CONFIG_IS_ENABLED(EFI_PARTITION)
178 * Public Functions (include/part.h)
182 * UUID is displayed as 32 hexadecimal digits, in 5 groups,
183 * separated by hyphens, in the form 8-4-4-4-12 for a total of 36 characters
185 int get_disk_guid(struct blk_desc
* dev_desc
, char *guid
)
187 ALLOC_CACHE_ALIGN_BUFFER_PAD(gpt_header
, gpt_head
, 1, dev_desc
->blksz
);
188 gpt_entry
*gpt_pte
= NULL
;
189 unsigned char *guid_bin
;
191 /* This function validates AND fills in the GPT header and PTE */
192 if (is_gpt_valid(dev_desc
, GPT_PRIMARY_PARTITION_TABLE_LBA
,
193 gpt_head
, &gpt_pte
) != 1) {
194 printf("%s: *** ERROR: Invalid GPT ***\n", __func__
);
195 if (is_gpt_valid(dev_desc
, dev_desc
->lba
- 1,
196 gpt_head
, &gpt_pte
) != 1) {
197 printf("%s: *** ERROR: Invalid Backup GPT ***\n",
201 printf("%s: *** Using Backup GPT ***\n",
206 guid_bin
= gpt_head
->disk_guid
.b
;
207 uuid_bin_to_str(guid_bin
, guid
, UUID_STR_FORMAT_GUID
);
212 void part_print_efi(struct blk_desc
*dev_desc
)
214 ALLOC_CACHE_ALIGN_BUFFER_PAD(gpt_header
, gpt_head
, 1, dev_desc
->blksz
);
215 gpt_entry
*gpt_pte
= NULL
;
217 char uuid
[UUID_STR_LEN
+ 1];
218 unsigned char *uuid_bin
;
220 /* This function validates AND fills in the GPT header and PTE */
221 if (is_gpt_valid(dev_desc
, GPT_PRIMARY_PARTITION_TABLE_LBA
,
222 gpt_head
, &gpt_pte
) != 1) {
223 printf("%s: *** ERROR: Invalid GPT ***\n", __func__
);
224 if (is_gpt_valid(dev_desc
, (dev_desc
->lba
- 1),
225 gpt_head
, &gpt_pte
) != 1) {
226 printf("%s: *** ERROR: Invalid Backup GPT ***\n",
230 printf("%s: *** Using Backup GPT ***\n",
235 debug("%s: gpt-entry at %p\n", __func__
, gpt_pte
);
237 printf("Part\tStart LBA\tEnd LBA\t\tName\n");
238 printf("\tAttributes\n");
239 printf("\tType GUID\n");
240 printf("\tPartition GUID\n");
242 for (i
= 0; i
< le32_to_cpu(gpt_head
->num_partition_entries
); i
++) {
243 /* Stop at the first non valid PTE */
244 if (!is_pte_valid(&gpt_pte
[i
]))
247 printf("%3d\t0x%08llx\t0x%08llx\t\"%s\"\n", (i
+ 1),
248 le64_to_cpu(gpt_pte
[i
].starting_lba
),
249 le64_to_cpu(gpt_pte
[i
].ending_lba
),
250 print_efiname(&gpt_pte
[i
]));
251 printf("\tattrs:\t0x%016llx\n", gpt_pte
[i
].attributes
.raw
);
252 uuid_bin
= (unsigned char *)gpt_pte
[i
].partition_type_guid
.b
;
253 uuid_bin_to_str(uuid_bin
, uuid
, UUID_STR_FORMAT_GUID
);
254 printf("\ttype:\t%s\n", uuid
);
255 #ifdef CONFIG_PARTITION_TYPE_GUID
256 if (!uuid_guid_get_str(uuid_bin
, uuid
))
257 printf("\ttype:\t%s\n", uuid
);
259 uuid_bin
= (unsigned char *)gpt_pte
[i
].unique_partition_guid
.b
;
260 uuid_bin_to_str(uuid_bin
, uuid
, UUID_STR_FORMAT_GUID
);
261 printf("\tguid:\t%s\n", uuid
);
264 /* Remember to free pte */
269 int part_get_info_efi(struct blk_desc
*dev_desc
, int part
,
270 disk_partition_t
*info
)
272 ALLOC_CACHE_ALIGN_BUFFER_PAD(gpt_header
, gpt_head
, 1, dev_desc
->blksz
);
273 gpt_entry
*gpt_pte
= NULL
;
275 /* "part" argument must be at least 1 */
277 printf("%s: Invalid Argument(s)\n", __func__
);
281 /* This function validates AND fills in the GPT header and PTE */
282 if (is_gpt_valid(dev_desc
, GPT_PRIMARY_PARTITION_TABLE_LBA
,
283 gpt_head
, &gpt_pte
) != 1) {
284 printf("%s: *** ERROR: Invalid GPT ***\n", __func__
);
285 if (is_gpt_valid(dev_desc
, (dev_desc
->lba
- 1),
286 gpt_head
, &gpt_pte
) != 1) {
287 printf("%s: *** ERROR: Invalid Backup GPT ***\n",
291 printf("%s: *** Using Backup GPT ***\n",
296 if (part
> le32_to_cpu(gpt_head
->num_partition_entries
) ||
297 !is_pte_valid(&gpt_pte
[part
- 1])) {
298 debug("%s: *** ERROR: Invalid partition number %d ***\n",
304 /* The 'lbaint_t' casting may limit the maximum disk size to 2 TB */
305 info
->start
= (lbaint_t
)le64_to_cpu(gpt_pte
[part
- 1].starting_lba
);
306 /* The ending LBA is inclusive, to calculate size, add 1 to it */
307 info
->size
= (lbaint_t
)le64_to_cpu(gpt_pte
[part
- 1].ending_lba
) + 1
309 info
->blksz
= dev_desc
->blksz
;
311 sprintf((char *)info
->name
, "%s",
312 print_efiname(&gpt_pte
[part
- 1]));
313 strcpy((char *)info
->type
, "U-Boot");
314 info
->bootable
= is_bootable(&gpt_pte
[part
- 1]);
315 #if CONFIG_IS_ENABLED(PARTITION_UUIDS)
316 uuid_bin_to_str(gpt_pte
[part
- 1].unique_partition_guid
.b
, info
->uuid
,
317 UUID_STR_FORMAT_GUID
);
319 #ifdef CONFIG_PARTITION_TYPE_GUID
320 uuid_bin_to_str(gpt_pte
[part
- 1].partition_type_guid
.b
,
321 info
->type_guid
, UUID_STR_FORMAT_GUID
);
324 debug("%s: start 0x" LBAF
", size 0x" LBAF
", name %s\n", __func__
,
325 info
->start
, info
->size
, info
->name
);
327 /* Remember to free pte */
332 static int part_test_efi(struct blk_desc
*dev_desc
)
334 ALLOC_CACHE_ALIGN_BUFFER_PAD(legacy_mbr
, legacymbr
, 1, dev_desc
->blksz
);
336 /* Read legacy MBR from block 0 and validate it */
337 if ((blk_dread(dev_desc
, 0, 1, (ulong
*)legacymbr
) != 1)
338 || (is_pmbr_valid(legacymbr
) != 1)) {
345 * set_protective_mbr(): Set the EFI protective MBR
346 * @param dev_desc - block device descriptor
348 * @return - zero on success, otherwise error
350 static int set_protective_mbr(struct blk_desc
*dev_desc
)
352 /* Setup the Protective MBR */
353 ALLOC_CACHE_ALIGN_BUFFER_PAD(legacy_mbr
, p_mbr
, 1, dev_desc
->blksz
);
354 memset(p_mbr
, 0, sizeof(*p_mbr
));
357 printf("%s: calloc failed!\n", __func__
);
361 /* Read MBR to backup boot code if it exists */
362 if (blk_dread(dev_desc
, 0, 1, p_mbr
) != 1) {
363 pr_err("** Can't read from device %d **\n", dev_desc
->devnum
);
367 /* Append signature */
368 p_mbr
->signature
= MSDOS_MBR_SIGNATURE
;
369 p_mbr
->partition_record
[0].sys_ind
= EFI_PMBR_OSTYPE_EFI_GPT
;
370 p_mbr
->partition_record
[0].start_sect
= 1;
371 p_mbr
->partition_record
[0].nr_sects
= (u32
) dev_desc
->lba
- 1;
373 /* Write MBR sector to the MMC device */
374 if (blk_dwrite(dev_desc
, 0, 1, p_mbr
) != 1) {
375 printf("** Can't write to device %d **\n",
383 int write_gpt_table(struct blk_desc
*dev_desc
,
384 gpt_header
*gpt_h
, gpt_entry
*gpt_e
)
386 const int pte_blk_cnt
= BLOCK_CNT((gpt_h
->num_partition_entries
387 * sizeof(gpt_entry
)), dev_desc
);
390 debug("max lba: %x\n", (u32
) dev_desc
->lba
);
391 /* Setup the Protective MBR */
392 if (set_protective_mbr(dev_desc
) < 0)
395 /* Generate CRC for the Primary GPT Header */
396 calc_crc32
= efi_crc32((const unsigned char *)gpt_e
,
397 le32_to_cpu(gpt_h
->num_partition_entries
) *
398 le32_to_cpu(gpt_h
->sizeof_partition_entry
));
399 gpt_h
->partition_entry_array_crc32
= cpu_to_le32(calc_crc32
);
401 calc_crc32
= efi_crc32((const unsigned char *)gpt_h
,
402 le32_to_cpu(gpt_h
->header_size
));
403 gpt_h
->header_crc32
= cpu_to_le32(calc_crc32
);
405 /* Write the First GPT to the block right after the Legacy MBR */
406 if (blk_dwrite(dev_desc
, 1, 1, gpt_h
) != 1)
409 if (blk_dwrite(dev_desc
, le64_to_cpu(gpt_h
->partition_entry_lba
),
410 pte_blk_cnt
, gpt_e
) != pte_blk_cnt
)
413 prepare_backup_gpt_header(gpt_h
);
415 if (blk_dwrite(dev_desc
, (lbaint_t
)le64_to_cpu(gpt_h
->last_usable_lba
)
416 + 1, pte_blk_cnt
, gpt_e
) != pte_blk_cnt
)
419 if (blk_dwrite(dev_desc
, (lbaint_t
)le64_to_cpu(gpt_h
->my_lba
), 1,
423 debug("GPT successfully written to block device!\n");
427 printf("** Can't write to device %d **\n", dev_desc
->devnum
);
431 int gpt_fill_pte(struct blk_desc
*dev_desc
,
432 gpt_header
*gpt_h
, gpt_entry
*gpt_e
,
433 disk_partition_t
*partitions
, int parts
)
435 lbaint_t offset
= (lbaint_t
)le64_to_cpu(gpt_h
->first_usable_lba
);
436 lbaint_t last_usable_lba
= (lbaint_t
)
437 le64_to_cpu(gpt_h
->last_usable_lba
);
439 size_t efiname_len
, dosname_len
;
440 #if CONFIG_IS_ENABLED(PARTITION_UUIDS)
442 unsigned char *bin_uuid
;
444 #ifdef CONFIG_PARTITION_TYPE_GUID
446 unsigned char *bin_type_guid
;
448 size_t hdr_start
= gpt_h
->my_lba
;
449 size_t hdr_end
= hdr_start
+ 1;
451 size_t pte_start
= gpt_h
->partition_entry_lba
;
452 size_t pte_end
= pte_start
+
453 gpt_h
->num_partition_entries
* gpt_h
->sizeof_partition_entry
/
456 for (i
= 0; i
< parts
; i
++) {
457 /* partition starting lba */
458 lbaint_t start
= partitions
[i
].start
;
459 lbaint_t size
= partitions
[i
].size
;
462 offset
= start
+ size
;
469 * If our partition overlaps with either the GPT
470 * header, or the partition entry, reject it.
472 if (((start
< hdr_end
&& hdr_start
< (start
+ size
)) ||
473 (start
< pte_end
&& pte_start
< (start
+ size
)))) {
474 printf("Partition overlap\n");
478 gpt_e
[i
].starting_lba
= cpu_to_le64(start
);
480 if (offset
> (last_usable_lba
+ 1)) {
481 printf("Partitions layout exceds disk size\n");
484 /* partition ending lba */
485 if ((i
== parts
- 1) && (size
== 0))
486 /* extend the last partition to maximuim */
487 gpt_e
[i
].ending_lba
= gpt_h
->last_usable_lba
;
489 gpt_e
[i
].ending_lba
= cpu_to_le64(offset
- 1);
491 #ifdef CONFIG_PARTITION_TYPE_GUID
492 str_type_guid
= partitions
[i
].type_guid
;
493 bin_type_guid
= gpt_e
[i
].partition_type_guid
.b
;
494 if (strlen(str_type_guid
)) {
495 if (uuid_str_to_bin(str_type_guid
, bin_type_guid
,
496 UUID_STR_FORMAT_GUID
)) {
497 printf("Partition no. %d: invalid type guid: %s\n",
502 /* default partition type GUID */
503 memcpy(bin_type_guid
,
504 &PARTITION_BASIC_DATA_GUID
, 16);
507 /* partition type GUID */
508 memcpy(gpt_e
[i
].partition_type_guid
.b
,
509 &PARTITION_BASIC_DATA_GUID
, 16);
512 #if CONFIG_IS_ENABLED(PARTITION_UUIDS)
513 str_uuid
= partitions
[i
].uuid
;
514 bin_uuid
= gpt_e
[i
].unique_partition_guid
.b
;
516 if (uuid_str_to_bin(str_uuid
, bin_uuid
, UUID_STR_FORMAT_GUID
)) {
517 printf("Partition no. %d: invalid guid: %s\n",
523 /* partition attributes */
524 memset(&gpt_e
[i
].attributes
, 0,
525 sizeof(gpt_entry_attributes
));
527 if (partitions
[i
].bootable
)
528 gpt_e
[i
].attributes
.fields
.legacy_bios_bootable
= 1;
531 efiname_len
= sizeof(gpt_e
[i
].partition_name
)
532 / sizeof(efi_char16_t
);
533 dosname_len
= sizeof(partitions
[i
].name
);
535 memset(gpt_e
[i
].partition_name
, 0,
536 sizeof(gpt_e
[i
].partition_name
));
538 for (k
= 0; k
< min(dosname_len
, efiname_len
); k
++)
539 gpt_e
[i
].partition_name
[k
] =
540 (efi_char16_t
)(partitions
[i
].name
[k
]);
542 debug("%s: name: %s offset[%d]: 0x" LBAF
543 " size[%d]: 0x" LBAF
"\n",
544 __func__
, partitions
[i
].name
, i
,
551 static uint32_t partition_entries_offset(struct blk_desc
*dev_desc
)
553 uint32_t offset_blks
= 2;
554 uint32_t __maybe_unused offset_bytes
;
555 int __maybe_unused config_offset
;
557 #if defined(CONFIG_EFI_PARTITION_ENTRIES_OFF)
559 * Some architectures require their SPL loader at a fixed
560 * address within the first 16KB of the disk. To avoid an
561 * overlap with the partition entries of the EFI partition
562 * table, the first safe offset (in bytes, from the start of
563 * the disk) for the entries can be set in
564 * CONFIG_EFI_PARTITION_ENTRIES_OFF.
567 PAD_TO_BLOCKSIZE(CONFIG_EFI_PARTITION_ENTRIES_OFF
, dev_desc
);
568 offset_blks
= offset_bytes
/ dev_desc
->blksz
;
571 #if defined(CONFIG_OF_CONTROL)
573 * Allow the offset of the first partition entires (in bytes
574 * from the start of the device) to be specified as a property
575 * of the device tree '/config' node.
577 config_offset
= fdtdec_get_config_int(gd
->fdt_blob
,
578 "u-boot,efi-partition-entries-offset",
580 if (config_offset
!= -EINVAL
) {
581 offset_bytes
= PAD_TO_BLOCKSIZE(config_offset
, dev_desc
);
582 offset_blks
= offset_bytes
/ dev_desc
->blksz
;
586 debug("efi: partition entries offset (in blocks): %d\n", offset_blks
);
589 * The earliest LBA this can be at is LBA#2 (i.e. right behind
590 * the (protective) MBR and the GPT header.
598 int gpt_fill_header(struct blk_desc
*dev_desc
, gpt_header
*gpt_h
,
599 char *str_guid
, int parts_count
)
601 gpt_h
->signature
= cpu_to_le64(GPT_HEADER_SIGNATURE
);
602 gpt_h
->revision
= cpu_to_le32(GPT_HEADER_REVISION_V1
);
603 gpt_h
->header_size
= cpu_to_le32(sizeof(gpt_header
));
604 gpt_h
->my_lba
= cpu_to_le64(1);
605 gpt_h
->alternate_lba
= cpu_to_le64(dev_desc
->lba
- 1);
606 gpt_h
->last_usable_lba
= cpu_to_le64(dev_desc
->lba
- 34);
607 gpt_h
->partition_entry_lba
=
608 cpu_to_le64(partition_entries_offset(dev_desc
));
609 gpt_h
->first_usable_lba
=
610 cpu_to_le64(le64_to_cpu(gpt_h
->partition_entry_lba
) + 32);
611 gpt_h
->num_partition_entries
= cpu_to_le32(GPT_ENTRY_NUMBERS
);
612 gpt_h
->sizeof_partition_entry
= cpu_to_le32(sizeof(gpt_entry
));
613 gpt_h
->header_crc32
= 0;
614 gpt_h
->partition_entry_array_crc32
= 0;
616 if (uuid_str_to_bin(str_guid
, gpt_h
->disk_guid
.b
, UUID_STR_FORMAT_GUID
))
622 int gpt_restore(struct blk_desc
*dev_desc
, char *str_disk_guid
,
623 disk_partition_t
*partitions
, int parts_count
)
629 size
= PAD_TO_BLOCKSIZE(sizeof(gpt_header
), dev_desc
);
630 gpt_h
= malloc_cache_aligned(size
);
632 printf("%s: calloc failed!\n", __func__
);
635 memset(gpt_h
, 0, size
);
637 size
= PAD_TO_BLOCKSIZE(GPT_ENTRY_NUMBERS
* sizeof(gpt_entry
),
639 gpt_e
= malloc_cache_aligned(size
);
641 printf("%s: calloc failed!\n", __func__
);
645 memset(gpt_e
, 0, size
);
647 /* Generate Primary GPT header (LBA1) */
648 ret
= gpt_fill_header(dev_desc
, gpt_h
, str_disk_guid
, parts_count
);
652 /* Generate partition entries */
653 ret
= gpt_fill_pte(dev_desc
, gpt_h
, gpt_e
, partitions
, parts_count
);
657 /* Write GPT partition table */
658 ret
= write_gpt_table(dev_desc
, gpt_h
, gpt_e
);
666 static void gpt_convert_efi_name_to_char(char *s
, efi_char16_t
*es
, int n
)
668 char *ess
= (char *)es
;
673 for (i
= 0, j
= 0; j
< n
; i
+= 2, j
++) {
680 int gpt_verify_headers(struct blk_desc
*dev_desc
, gpt_header
*gpt_head
,
684 * This function validates AND
685 * fills in the GPT header and PTE
687 if (is_gpt_valid(dev_desc
,
688 GPT_PRIMARY_PARTITION_TABLE_LBA
,
689 gpt_head
, gpt_pte
) != 1) {
690 printf("%s: *** ERROR: Invalid GPT ***\n",
694 if (is_gpt_valid(dev_desc
, (dev_desc
->lba
- 1),
695 gpt_head
, gpt_pte
) != 1) {
696 printf("%s: *** ERROR: Invalid Backup GPT ***\n",
704 int gpt_verify_partitions(struct blk_desc
*dev_desc
,
705 disk_partition_t
*partitions
, int parts
,
706 gpt_header
*gpt_head
, gpt_entry
**gpt_pte
)
708 char efi_str
[PARTNAME_SZ
+ 1];
713 ret
= gpt_verify_headers(dev_desc
, gpt_head
, gpt_pte
);
719 for (i
= 0; i
< parts
; i
++) {
720 if (i
== gpt_head
->num_partition_entries
) {
721 pr_err("More partitions than allowed!\n");
725 /* Check if GPT and ENV partition names match */
726 gpt_convert_efi_name_to_char(efi_str
, gpt_e
[i
].partition_name
,
729 debug("%s: part: %2d name - GPT: %16s, ENV: %16s ",
730 __func__
, i
, efi_str
, partitions
[i
].name
);
732 if (strncmp(efi_str
, (char *)partitions
[i
].name
,
733 sizeof(partitions
->name
))) {
734 pr_err("Partition name: %s does not match %s!\n",
735 efi_str
, (char *)partitions
[i
].name
);
739 /* Check if GPT and ENV sizes match */
740 gpt_part_size
= le64_to_cpu(gpt_e
[i
].ending_lba
) -
741 le64_to_cpu(gpt_e
[i
].starting_lba
) + 1;
742 debug("size(LBA) - GPT: %8llu, ENV: %8llu ",
743 (unsigned long long)gpt_part_size
,
744 (unsigned long long)partitions
[i
].size
);
746 if (le64_to_cpu(gpt_part_size
) != partitions
[i
].size
) {
747 /* We do not check the extend partition size */
748 if ((i
== parts
- 1) && (partitions
[i
].size
== 0))
751 pr_err("Partition %s size: %llu does not match %llu!\n",
752 efi_str
, (unsigned long long)gpt_part_size
,
753 (unsigned long long)partitions
[i
].size
);
758 * Start address is optional - check only if provided
759 * in '$partition' variable
761 if (!partitions
[i
].start
) {
766 /* Check if GPT and ENV start LBAs match */
767 debug("start LBA - GPT: %8llu, ENV: %8llu\n",
768 le64_to_cpu(gpt_e
[i
].starting_lba
),
769 (unsigned long long)partitions
[i
].start
);
771 if (le64_to_cpu(gpt_e
[i
].starting_lba
) != partitions
[i
].start
) {
772 pr_err("Partition %s start: %llu does not match %llu!\n",
773 efi_str
, le64_to_cpu(gpt_e
[i
].starting_lba
),
774 (unsigned long long)partitions
[i
].start
);
782 int is_valid_gpt_buf(struct blk_desc
*dev_desc
, void *buf
)
787 /* determine start of GPT Header in the buffer */
788 gpt_h
= buf
+ (GPT_PRIMARY_PARTITION_TABLE_LBA
*
790 if (validate_gpt_header(gpt_h
, GPT_PRIMARY_PARTITION_TABLE_LBA
,
794 /* determine start of GPT Entries in the buffer */
795 gpt_e
= buf
+ (le64_to_cpu(gpt_h
->partition_entry_lba
) *
797 if (validate_gpt_entries(gpt_h
, gpt_e
))
803 int write_mbr_and_gpt_partitions(struct blk_desc
*dev_desc
, void *buf
)
811 if (is_valid_gpt_buf(dev_desc
, buf
))
814 /* determine start of GPT Header in the buffer */
815 gpt_h
= buf
+ (GPT_PRIMARY_PARTITION_TABLE_LBA
*
818 /* determine start of GPT Entries in the buffer */
819 gpt_e
= buf
+ (le64_to_cpu(gpt_h
->partition_entry_lba
) *
821 gpt_e_blk_cnt
= BLOCK_CNT((le32_to_cpu(gpt_h
->num_partition_entries
) *
822 le32_to_cpu(gpt_h
->sizeof_partition_entry
)),
826 lba
= 0; /* MBR is always at 0 */
827 cnt
= 1; /* MBR (1 block) */
828 if (blk_dwrite(dev_desc
, lba
, cnt
, buf
) != cnt
) {
829 printf("%s: failed writing '%s' (%d blks at 0x" LBAF
")\n",
830 __func__
, "MBR", cnt
, lba
);
834 /* write Primary GPT */
835 lba
= GPT_PRIMARY_PARTITION_TABLE_LBA
;
836 cnt
= 1; /* GPT Header (1 block) */
837 if (blk_dwrite(dev_desc
, lba
, cnt
, gpt_h
) != cnt
) {
838 printf("%s: failed writing '%s' (%d blks at 0x" LBAF
")\n",
839 __func__
, "Primary GPT Header", cnt
, lba
);
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__
, "Primary GPT Entries", cnt
, lba
);
851 prepare_backup_gpt_header(gpt_h
);
853 /* write Backup GPT */
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__
, "Backup GPT Entries", cnt
, lba
);
862 lba
= le64_to_cpu(gpt_h
->my_lba
);
863 cnt
= 1; /* GPT Header (1 block) */
864 if (blk_dwrite(dev_desc
, lba
, cnt
, gpt_h
) != cnt
) {
865 printf("%s: failed writing '%s' (%d blks at 0x" LBAF
")\n",
866 __func__
, "Backup GPT Header", cnt
, lba
);
878 * pmbr_part_valid(): Check for EFI partition signature
880 * Returns: 1 if EFI GPT partition type is found.
882 static int pmbr_part_valid(struct partition
*part
)
884 if (part
->sys_ind
== EFI_PMBR_OSTYPE_EFI_GPT
&&
885 get_unaligned_le32(&part
->start_sect
) == 1UL) {
893 * is_pmbr_valid(): test Protective MBR for validity
895 * Returns: 1 if PMBR is valid, 0 otherwise.
896 * Validity depends on two things:
897 * 1) MSDOS signature is in the last two bytes of the MBR
898 * 2) One partition of type 0xEE is found, checked by pmbr_part_valid()
900 static int is_pmbr_valid(legacy_mbr
* mbr
)
904 if (!mbr
|| le16_to_cpu(mbr
->signature
) != MSDOS_MBR_SIGNATURE
)
907 for (i
= 0; i
< 4; i
++) {
908 if (pmbr_part_valid(&mbr
->partition_record
[i
])) {
916 * is_gpt_valid() - tests one GPT header and PTEs for validity
918 * lba is the logical block address of the GPT header to test
919 * gpt is a GPT header ptr, filled on return.
920 * ptes is a PTEs ptr, filled on return.
922 * Description: returns 1 if valid, 0 on error.
923 * If valid, returns pointers to PTEs.
925 static int is_gpt_valid(struct blk_desc
*dev_desc
, u64 lba
,
926 gpt_header
*pgpt_head
, gpt_entry
**pgpt_pte
)
928 /* Confirm valid arguments prior to allocation. */
929 if (!dev_desc
|| !pgpt_head
) {
930 printf("%s: Invalid Argument(s)\n", __func__
);
934 ALLOC_CACHE_ALIGN_BUFFER_PAD(legacy_mbr
, mbr
, 1, dev_desc
->blksz
);
936 /* Read MBR Header from device */
937 if (blk_dread(dev_desc
, 0, 1, (ulong
*)mbr
) != 1) {
938 printf("*** ERROR: Can't read MBR header ***\n");
942 /* Read GPT Header from device */
943 if (blk_dread(dev_desc
, (lbaint_t
)lba
, 1, pgpt_head
) != 1) {
944 printf("*** ERROR: Can't read GPT header ***\n");
948 if (validate_gpt_header(pgpt_head
, (lbaint_t
)lba
, dev_desc
->lba
))
951 if (dev_desc
->sig_type
== SIG_TYPE_NONE
) {
952 efi_guid_t empty
= {};
953 if (memcmp(&pgpt_head
->disk_guid
, &empty
, sizeof(empty
))) {
954 dev_desc
->sig_type
= SIG_TYPE_GUID
;
955 memcpy(&dev_desc
->guid_sig
, &pgpt_head
->disk_guid
,
957 } else if (mbr
->unique_mbr_signature
!= 0) {
958 dev_desc
->sig_type
= SIG_TYPE_MBR
;
959 dev_desc
->mbr_sig
= mbr
->unique_mbr_signature
;
963 /* Read and allocate Partition Table Entries */
964 *pgpt_pte
= alloc_read_gpt_entries(dev_desc
, pgpt_head
);
965 if (*pgpt_pte
== NULL
) {
966 printf("GPT: Failed to allocate memory for PTE\n");
970 if (validate_gpt_entries(pgpt_head
, *pgpt_pte
)) {
975 /* We're done, all's well */
980 * alloc_read_gpt_entries(): reads partition entries from disk
984 * Description: Returns ptes on success, NULL on error.
985 * Allocates space for PTEs based on information found in @gpt.
986 * Notes: remember to free pte when you're done!
988 static gpt_entry
*alloc_read_gpt_entries(struct blk_desc
*dev_desc
,
989 gpt_header
*pgpt_head
)
991 size_t count
= 0, blk_cnt
;
993 gpt_entry
*pte
= NULL
;
995 if (!dev_desc
|| !pgpt_head
) {
996 printf("%s: Invalid Argument(s)\n", __func__
);
1000 count
= le32_to_cpu(pgpt_head
->num_partition_entries
) *
1001 le32_to_cpu(pgpt_head
->sizeof_partition_entry
);
1003 debug("%s: count = %u * %u = %lu\n", __func__
,
1004 (u32
) le32_to_cpu(pgpt_head
->num_partition_entries
),
1005 (u32
) le32_to_cpu(pgpt_head
->sizeof_partition_entry
),
1008 /* Allocate memory for PTE, remember to FREE */
1010 pte
= memalign(ARCH_DMA_MINALIGN
,
1011 PAD_TO_BLOCKSIZE(count
, dev_desc
));
1014 if (count
== 0 || pte
== NULL
) {
1015 printf("%s: ERROR: Can't allocate %#lX bytes for GPT Entries\n",
1016 __func__
, (ulong
)count
);
1020 /* Read GPT Entries from device */
1021 blk
= le64_to_cpu(pgpt_head
->partition_entry_lba
);
1022 blk_cnt
= BLOCK_CNT(count
, dev_desc
);
1023 if (blk_dread(dev_desc
, blk
, (lbaint_t
)blk_cnt
, pte
) != blk_cnt
) {
1024 printf("*** ERROR: Can't read GPT Entries ***\n");
1032 * is_pte_valid(): validates a single Partition Table Entry
1033 * @gpt_entry - Pointer to a single Partition Table Entry
1035 * Description: returns 1 if valid, 0 on error.
1037 static int is_pte_valid(gpt_entry
* pte
)
1039 efi_guid_t unused_guid
;
1042 printf("%s: Invalid Argument(s)\n", __func__
);
1046 /* Only one validation for now:
1047 * The GUID Partition Type != Unused Entry (ALL-ZERO)
1049 memset(unused_guid
.b
, 0, sizeof(unused_guid
.b
));
1051 if (memcmp(pte
->partition_type_guid
.b
, unused_guid
.b
,
1052 sizeof(unused_guid
.b
)) == 0) {
1054 debug("%s: Found an unused PTE GUID at 0x%08X\n", __func__
,
1055 (unsigned int)(uintptr_t)pte
);
1064 * Add an 'a_' prefix so it comes before 'dos' in the linker list. We need to
1065 * check EFI first, since a DOS partition is often used as a 'protective MBR'
1068 U_BOOT_PART_TYPE(a_efi
) = {
1070 .part_type
= PART_TYPE_EFI
,
1071 .max_entries
= GPT_ENTRY_NUMBERS
,
1072 .get_info
= part_get_info_ptr(part_get_info_efi
),
1073 .print
= part_print_ptr(part_print_efi
),
1074 .test
= part_test_efi
,