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>
21 #include <linux/ctype.h>
23 DECLARE_GLOBAL_DATA_PTR
;
25 #ifdef HAVE_BLOCK_DEVICE
27 * efi_crc32() - EFI version of crc32 function
28 * @buf: buffer to calculate crc32 of
29 * @len - length of buf
31 * Description: Returns EFI-style CRC32 value for @buf
33 static inline u32
efi_crc32(const void *buf
, u32 len
)
35 return crc32(0, buf
, len
);
39 * Private function prototypes
42 static int pmbr_part_valid(struct partition
*part
);
43 static int is_pmbr_valid(legacy_mbr
* mbr
);
44 static int is_gpt_valid(struct blk_desc
*dev_desc
, u64 lba
,
45 gpt_header
*pgpt_head
, gpt_entry
**pgpt_pte
);
46 static gpt_entry
*alloc_read_gpt_entries(struct blk_desc
*dev_desc
,
47 gpt_header
*pgpt_head
);
48 static int is_pte_valid(gpt_entry
* pte
);
50 static char *print_efiname(gpt_entry
*pte
)
52 static char name
[PARTNAME_SZ
+ 1];
54 for (i
= 0; i
< PARTNAME_SZ
; i
++) {
56 c
= pte
->partition_name
[i
] & 0xff;
57 c
= (c
&& !isprint(c
)) ? '.' : c
;
60 name
[PARTNAME_SZ
] = 0;
64 static efi_guid_t system_guid
= PARTITION_SYSTEM_GUID
;
66 static inline int is_bootable(gpt_entry
*p
)
68 return p
->attributes
.fields
.legacy_bios_bootable
||
69 !memcmp(&(p
->partition_type_guid
), &system_guid
,
73 static int validate_gpt_header(gpt_header
*gpt_h
, lbaint_t lba
,
76 uint32_t crc32_backup
= 0;
79 /* Check the GPT header signature */
80 if (le64_to_cpu(gpt_h
->signature
) != GPT_HEADER_SIGNATURE
) {
81 printf("%s signature is wrong: 0x%llX != 0x%llX\n",
82 "GUID Partition Table Header",
83 le64_to_cpu(gpt_h
->signature
),
84 GPT_HEADER_SIGNATURE
);
88 /* Check the GUID Partition Table CRC */
89 memcpy(&crc32_backup
, &gpt_h
->header_crc32
, sizeof(crc32_backup
));
90 memset(&gpt_h
->header_crc32
, 0, sizeof(gpt_h
->header_crc32
));
92 calc_crc32
= efi_crc32((const unsigned char *)gpt_h
,
93 le32_to_cpu(gpt_h
->header_size
));
95 memcpy(&gpt_h
->header_crc32
, &crc32_backup
, sizeof(crc32_backup
));
97 if (calc_crc32
!= le32_to_cpu(crc32_backup
)) {
98 printf("%s CRC is wrong: 0x%x != 0x%x\n",
99 "GUID Partition Table Header",
100 le32_to_cpu(crc32_backup
), calc_crc32
);
105 * Check that the my_lba entry points to the LBA that contains the GPT
107 if (le64_to_cpu(gpt_h
->my_lba
) != lba
) {
108 printf("GPT: my_lba incorrect: %llX != " LBAF
"\n",
109 le64_to_cpu(gpt_h
->my_lba
),
115 * Check that the first_usable_lba and that the last_usable_lba are
118 if (le64_to_cpu(gpt_h
->first_usable_lba
) > lastlba
) {
119 printf("GPT: first_usable_lba incorrect: %llX > " LBAF
"\n",
120 le64_to_cpu(gpt_h
->first_usable_lba
), lastlba
);
123 if (le64_to_cpu(gpt_h
->last_usable_lba
) > lastlba
) {
124 printf("GPT: last_usable_lba incorrect: %llX > " LBAF
"\n",
125 le64_to_cpu(gpt_h
->last_usable_lba
), lastlba
);
129 debug("GPT: first_usable_lba: %llX last_usable_lba: %llX last lba: "
130 LBAF
"\n", le64_to_cpu(gpt_h
->first_usable_lba
),
131 le64_to_cpu(gpt_h
->last_usable_lba
), lastlba
);
136 static int validate_gpt_entries(gpt_header
*gpt_h
, gpt_entry
*gpt_e
)
140 /* Check the GUID Partition Table Entry Array CRC */
141 calc_crc32
= efi_crc32((const unsigned char *)gpt_e
,
142 le32_to_cpu(gpt_h
->num_partition_entries
) *
143 le32_to_cpu(gpt_h
->sizeof_partition_entry
));
145 if (calc_crc32
!= le32_to_cpu(gpt_h
->partition_entry_array_crc32
)) {
146 printf("%s: 0x%x != 0x%x\n",
147 "GUID Partition Table Entry Array CRC is wrong",
148 le32_to_cpu(gpt_h
->partition_entry_array_crc32
),
156 static void prepare_backup_gpt_header(gpt_header
*gpt_h
)
161 /* recalculate the values for the Backup GPT Header */
162 val
= le64_to_cpu(gpt_h
->my_lba
);
163 gpt_h
->my_lba
= gpt_h
->alternate_lba
;
164 gpt_h
->alternate_lba
= cpu_to_le64(val
);
165 gpt_h
->partition_entry_lba
=
166 cpu_to_le64(le64_to_cpu(gpt_h
->last_usable_lba
) + 1);
167 gpt_h
->header_crc32
= 0;
169 calc_crc32
= efi_crc32((const unsigned char *)gpt_h
,
170 le32_to_cpu(gpt_h
->header_size
));
171 gpt_h
->header_crc32
= cpu_to_le32(calc_crc32
);
174 #ifdef CONFIG_EFI_PARTITION
176 * Public Functions (include/part.h)
179 void part_print_efi(struct blk_desc
*dev_desc
)
181 ALLOC_CACHE_ALIGN_BUFFER_PAD(gpt_header
, gpt_head
, 1, dev_desc
->blksz
);
182 gpt_entry
*gpt_pte
= NULL
;
185 unsigned char *uuid_bin
;
187 /* This function validates AND fills in the GPT header and PTE */
188 if (is_gpt_valid(dev_desc
, GPT_PRIMARY_PARTITION_TABLE_LBA
,
189 gpt_head
, &gpt_pte
) != 1) {
190 printf("%s: *** ERROR: Invalid GPT ***\n", __func__
);
191 if (is_gpt_valid(dev_desc
, (dev_desc
->lba
- 1),
192 gpt_head
, &gpt_pte
) != 1) {
193 printf("%s: *** ERROR: Invalid Backup GPT ***\n",
197 printf("%s: *** Using Backup GPT ***\n",
202 debug("%s: gpt-entry at %p\n", __func__
, gpt_pte
);
204 printf("Part\tStart LBA\tEnd LBA\t\tName\n");
205 printf("\tAttributes\n");
206 printf("\tType GUID\n");
207 printf("\tPartition GUID\n");
209 for (i
= 0; i
< le32_to_cpu(gpt_head
->num_partition_entries
); i
++) {
210 /* Stop at the first non valid PTE */
211 if (!is_pte_valid(&gpt_pte
[i
]))
214 printf("%3d\t0x%08llx\t0x%08llx\t\"%s\"\n", (i
+ 1),
215 le64_to_cpu(gpt_pte
[i
].starting_lba
),
216 le64_to_cpu(gpt_pte
[i
].ending_lba
),
217 print_efiname(&gpt_pte
[i
]));
218 printf("\tattrs:\t0x%016llx\n", gpt_pte
[i
].attributes
.raw
);
219 uuid_bin
= (unsigned char *)gpt_pte
[i
].partition_type_guid
.b
;
220 uuid_bin_to_str(uuid_bin
, uuid
, UUID_STR_FORMAT_GUID
);
221 printf("\ttype:\t%s\n", uuid
);
222 #ifdef CONFIG_PARTITION_TYPE_GUID
223 if (!uuid_guid_get_str(uuid_bin
, uuid
))
224 printf("\ttype:\t%s\n", uuid
);
226 uuid_bin
= (unsigned char *)gpt_pte
[i
].unique_partition_guid
.b
;
227 uuid_bin_to_str(uuid_bin
, uuid
, UUID_STR_FORMAT_GUID
);
228 printf("\tguid:\t%s\n", uuid
);
231 /* Remember to free pte */
236 int part_get_info_efi(struct blk_desc
*dev_desc
, int part
,
237 disk_partition_t
*info
)
239 ALLOC_CACHE_ALIGN_BUFFER_PAD(gpt_header
, gpt_head
, 1, dev_desc
->blksz
);
240 gpt_entry
*gpt_pte
= NULL
;
242 /* "part" argument must be at least 1 */
244 printf("%s: Invalid Argument(s)\n", __func__
);
248 /* This function validates AND fills in the GPT header and PTE */
249 if (is_gpt_valid(dev_desc
, GPT_PRIMARY_PARTITION_TABLE_LBA
,
250 gpt_head
, &gpt_pte
) != 1) {
251 printf("%s: *** ERROR: Invalid GPT ***\n", __func__
);
252 if (is_gpt_valid(dev_desc
, (dev_desc
->lba
- 1),
253 gpt_head
, &gpt_pte
) != 1) {
254 printf("%s: *** ERROR: Invalid Backup GPT ***\n",
258 printf("%s: *** Using Backup GPT ***\n",
263 if (part
> le32_to_cpu(gpt_head
->num_partition_entries
) ||
264 !is_pte_valid(&gpt_pte
[part
- 1])) {
265 debug("%s: *** ERROR: Invalid partition number %d ***\n",
271 /* The 'lbaint_t' casting may limit the maximum disk size to 2 TB */
272 info
->start
= (lbaint_t
)le64_to_cpu(gpt_pte
[part
- 1].starting_lba
);
273 /* The ending LBA is inclusive, to calculate size, add 1 to it */
274 info
->size
= (lbaint_t
)le64_to_cpu(gpt_pte
[part
- 1].ending_lba
) + 1
276 info
->blksz
= dev_desc
->blksz
;
278 sprintf((char *)info
->name
, "%s",
279 print_efiname(&gpt_pte
[part
- 1]));
280 strcpy((char *)info
->type
, "U-Boot");
281 info
->bootable
= is_bootable(&gpt_pte
[part
- 1]);
282 #ifdef CONFIG_PARTITION_UUIDS
283 uuid_bin_to_str(gpt_pte
[part
- 1].unique_partition_guid
.b
, info
->uuid
,
284 UUID_STR_FORMAT_GUID
);
286 #ifdef CONFIG_PARTITION_TYPE_GUID
287 uuid_bin_to_str(gpt_pte
[part
- 1].partition_type_guid
.b
,
288 info
->type_guid
, UUID_STR_FORMAT_GUID
);
291 debug("%s: start 0x" LBAF
", size 0x" LBAF
", name %s\n", __func__
,
292 info
->start
, info
->size
, info
->name
);
294 /* Remember to free pte */
299 static int part_test_efi(struct blk_desc
*dev_desc
)
301 ALLOC_CACHE_ALIGN_BUFFER_PAD(legacy_mbr
, legacymbr
, 1, dev_desc
->blksz
);
303 /* Read legacy MBR from block 0 and validate it */
304 if ((blk_dread(dev_desc
, 0, 1, (ulong
*)legacymbr
) != 1)
305 || (is_pmbr_valid(legacymbr
) != 1)) {
312 * set_protective_mbr(): Set the EFI protective MBR
313 * @param dev_desc - block device descriptor
315 * @return - zero on success, otherwise error
317 static int set_protective_mbr(struct blk_desc
*dev_desc
)
319 /* Setup the Protective MBR */
320 ALLOC_CACHE_ALIGN_BUFFER(legacy_mbr
, p_mbr
, 1);
321 memset(p_mbr
, 0, sizeof(*p_mbr
));
324 printf("%s: calloc failed!\n", __func__
);
327 /* Append signature */
328 p_mbr
->signature
= MSDOS_MBR_SIGNATURE
;
329 p_mbr
->partition_record
[0].sys_ind
= EFI_PMBR_OSTYPE_EFI_GPT
;
330 p_mbr
->partition_record
[0].start_sect
= 1;
331 p_mbr
->partition_record
[0].nr_sects
= (u32
) dev_desc
->lba
- 1;
333 /* Write MBR sector to the MMC device */
334 if (blk_dwrite(dev_desc
, 0, 1, p_mbr
) != 1) {
335 printf("** Can't write to device %d **\n",
343 int write_gpt_table(struct blk_desc
*dev_desc
,
344 gpt_header
*gpt_h
, gpt_entry
*gpt_e
)
346 const int pte_blk_cnt
= BLOCK_CNT((gpt_h
->num_partition_entries
347 * sizeof(gpt_entry
)), dev_desc
);
350 debug("max lba: %x\n", (u32
) dev_desc
->lba
);
351 /* Setup the Protective MBR */
352 if (set_protective_mbr(dev_desc
) < 0)
355 /* Generate CRC for the Primary GPT Header */
356 calc_crc32
= efi_crc32((const unsigned char *)gpt_e
,
357 le32_to_cpu(gpt_h
->num_partition_entries
) *
358 le32_to_cpu(gpt_h
->sizeof_partition_entry
));
359 gpt_h
->partition_entry_array_crc32
= cpu_to_le32(calc_crc32
);
361 calc_crc32
= efi_crc32((const unsigned char *)gpt_h
,
362 le32_to_cpu(gpt_h
->header_size
));
363 gpt_h
->header_crc32
= cpu_to_le32(calc_crc32
);
365 /* Write the First GPT to the block right after the Legacy MBR */
366 if (blk_dwrite(dev_desc
, 1, 1, gpt_h
) != 1)
369 if (blk_dwrite(dev_desc
, 2, pte_blk_cnt
, gpt_e
)
373 prepare_backup_gpt_header(gpt_h
);
375 if (blk_dwrite(dev_desc
, (lbaint_t
)le64_to_cpu(gpt_h
->last_usable_lba
)
376 + 1, pte_blk_cnt
, gpt_e
) != pte_blk_cnt
)
379 if (blk_dwrite(dev_desc
, (lbaint_t
)le64_to_cpu(gpt_h
->my_lba
), 1,
383 debug("GPT successfully written to block device!\n");
387 printf("** Can't write to device %d **\n", dev_desc
->devnum
);
391 int gpt_fill_pte(gpt_header
*gpt_h
, gpt_entry
*gpt_e
,
392 disk_partition_t
*partitions
, int parts
)
394 lbaint_t offset
= (lbaint_t
)le64_to_cpu(gpt_h
->first_usable_lba
);
396 lbaint_t last_usable_lba
= (lbaint_t
)
397 le64_to_cpu(gpt_h
->last_usable_lba
);
399 size_t efiname_len
, dosname_len
;
400 #ifdef CONFIG_PARTITION_UUIDS
402 unsigned char *bin_uuid
;
404 #ifdef CONFIG_PARTITION_TYPE_GUID
406 unsigned char *bin_type_guid
;
409 for (i
= 0; i
< parts
; i
++) {
410 /* partition starting lba */
411 start
= partitions
[i
].start
;
412 if (start
&& (start
< offset
)) {
413 printf("Partition overlap\n");
417 gpt_e
[i
].starting_lba
= cpu_to_le64(start
);
418 offset
= start
+ partitions
[i
].size
;
420 gpt_e
[i
].starting_lba
= cpu_to_le64(offset
);
421 offset
+= partitions
[i
].size
;
423 if (offset
> (last_usable_lba
+ 1)) {
424 printf("Partitions layout exceds disk size\n");
427 /* partition ending lba */
428 if ((i
== parts
- 1) && (partitions
[i
].size
== 0))
429 /* extend the last partition to maximuim */
430 gpt_e
[i
].ending_lba
= gpt_h
->last_usable_lba
;
432 gpt_e
[i
].ending_lba
= cpu_to_le64(offset
- 1);
434 #ifdef CONFIG_PARTITION_TYPE_GUID
435 str_type_guid
= partitions
[i
].type_guid
;
436 bin_type_guid
= gpt_e
[i
].partition_type_guid
.b
;
437 if (strlen(str_type_guid
)) {
438 if (uuid_str_to_bin(str_type_guid
, bin_type_guid
,
439 UUID_STR_FORMAT_GUID
)) {
440 printf("Partition no. %d: invalid type guid: %s\n",
445 /* default partition type GUID */
446 memcpy(bin_type_guid
,
447 &PARTITION_BASIC_DATA_GUID
, 16);
450 /* partition type GUID */
451 memcpy(gpt_e
[i
].partition_type_guid
.b
,
452 &PARTITION_BASIC_DATA_GUID
, 16);
455 #ifdef CONFIG_PARTITION_UUIDS
456 str_uuid
= partitions
[i
].uuid
;
457 bin_uuid
= gpt_e
[i
].unique_partition_guid
.b
;
459 if (uuid_str_to_bin(str_uuid
, bin_uuid
, UUID_STR_FORMAT_STD
)) {
460 printf("Partition no. %d: invalid guid: %s\n",
466 /* partition attributes */
467 memset(&gpt_e
[i
].attributes
, 0,
468 sizeof(gpt_entry_attributes
));
470 if (partitions
[i
].bootable
)
471 gpt_e
[i
].attributes
.fields
.legacy_bios_bootable
= 1;
474 efiname_len
= sizeof(gpt_e
[i
].partition_name
)
475 / sizeof(efi_char16_t
);
476 dosname_len
= sizeof(partitions
[i
].name
);
478 memset(gpt_e
[i
].partition_name
, 0,
479 sizeof(gpt_e
[i
].partition_name
));
481 for (k
= 0; k
< min(dosname_len
, efiname_len
); k
++)
482 gpt_e
[i
].partition_name
[k
] =
483 (efi_char16_t
)(partitions
[i
].name
[k
]);
485 debug("%s: name: %s offset[%d]: 0x" LBAF
486 " size[%d]: 0x" LBAF
"\n",
487 __func__
, partitions
[i
].name
, i
,
488 offset
, i
, partitions
[i
].size
);
494 int gpt_fill_header(struct blk_desc
*dev_desc
, gpt_header
*gpt_h
,
495 char *str_guid
, int parts_count
)
497 gpt_h
->signature
= cpu_to_le64(GPT_HEADER_SIGNATURE
);
498 gpt_h
->revision
= cpu_to_le32(GPT_HEADER_REVISION_V1
);
499 gpt_h
->header_size
= cpu_to_le32(sizeof(gpt_header
));
500 gpt_h
->my_lba
= cpu_to_le64(1);
501 gpt_h
->alternate_lba
= cpu_to_le64(dev_desc
->lba
- 1);
502 gpt_h
->first_usable_lba
= cpu_to_le64(34);
503 gpt_h
->last_usable_lba
= cpu_to_le64(dev_desc
->lba
- 34);
504 gpt_h
->partition_entry_lba
= cpu_to_le64(2);
505 gpt_h
->num_partition_entries
= cpu_to_le32(GPT_ENTRY_NUMBERS
);
506 gpt_h
->sizeof_partition_entry
= cpu_to_le32(sizeof(gpt_entry
));
507 gpt_h
->header_crc32
= 0;
508 gpt_h
->partition_entry_array_crc32
= 0;
510 if (uuid_str_to_bin(str_guid
, gpt_h
->disk_guid
.b
, UUID_STR_FORMAT_GUID
))
516 int gpt_restore(struct blk_desc
*dev_desc
, char *str_disk_guid
,
517 disk_partition_t
*partitions
, int parts_count
)
521 gpt_header
*gpt_h
= calloc(1, PAD_TO_BLOCKSIZE(sizeof(gpt_header
),
526 printf("%s: calloc failed!\n", __func__
);
530 gpt_e
= calloc(1, PAD_TO_BLOCKSIZE(GPT_ENTRY_NUMBERS
534 printf("%s: calloc failed!\n", __func__
);
539 /* Generate Primary GPT header (LBA1) */
540 ret
= gpt_fill_header(dev_desc
, gpt_h
, str_disk_guid
, parts_count
);
544 /* Generate partition entries */
545 ret
= gpt_fill_pte(gpt_h
, gpt_e
, partitions
, parts_count
);
549 /* Write GPT partition table */
550 ret
= write_gpt_table(dev_desc
, gpt_h
, gpt_e
);
558 static void gpt_convert_efi_name_to_char(char *s
, efi_char16_t
*es
, int n
)
560 char *ess
= (char *)es
;
565 for (i
= 0, j
= 0; j
< n
; i
+= 2, j
++) {
572 int gpt_verify_headers(struct blk_desc
*dev_desc
, gpt_header
*gpt_head
,
576 * This function validates AND
577 * fills in the GPT header and PTE
579 if (is_gpt_valid(dev_desc
,
580 GPT_PRIMARY_PARTITION_TABLE_LBA
,
581 gpt_head
, gpt_pte
) != 1) {
582 printf("%s: *** ERROR: Invalid GPT ***\n",
586 if (is_gpt_valid(dev_desc
, (dev_desc
->lba
- 1),
587 gpt_head
, gpt_pte
) != 1) {
588 printf("%s: *** ERROR: Invalid Backup GPT ***\n",
596 int gpt_verify_partitions(struct blk_desc
*dev_desc
,
597 disk_partition_t
*partitions
, int parts
,
598 gpt_header
*gpt_head
, gpt_entry
**gpt_pte
)
600 char efi_str
[PARTNAME_SZ
+ 1];
605 ret
= gpt_verify_headers(dev_desc
, gpt_head
, gpt_pte
);
611 for (i
= 0; i
< parts
; i
++) {
612 if (i
== gpt_head
->num_partition_entries
) {
613 error("More partitions than allowed!\n");
617 /* Check if GPT and ENV partition names match */
618 gpt_convert_efi_name_to_char(efi_str
, gpt_e
[i
].partition_name
,
621 debug("%s: part: %2d name - GPT: %16s, ENV: %16s ",
622 __func__
, i
, efi_str
, partitions
[i
].name
);
624 if (strncmp(efi_str
, (char *)partitions
[i
].name
,
625 sizeof(partitions
->name
))) {
626 error("Partition name: %s does not match %s!\n",
627 efi_str
, (char *)partitions
[i
].name
);
631 /* Check if GPT and ENV sizes match */
632 gpt_part_size
= le64_to_cpu(gpt_e
[i
].ending_lba
) -
633 le64_to_cpu(gpt_e
[i
].starting_lba
) + 1;
634 debug("size(LBA) - GPT: %8llu, ENV: %8llu ",
635 (unsigned long long)gpt_part_size
,
636 (unsigned long long)partitions
[i
].size
);
638 if (le64_to_cpu(gpt_part_size
) != partitions
[i
].size
) {
639 /* We do not check the extend partition size */
640 if ((i
== parts
- 1) && (partitions
[i
].size
== 0))
643 error("Partition %s size: %llu does not match %llu!\n",
644 efi_str
, (unsigned long long)gpt_part_size
,
645 (unsigned long long)partitions
[i
].size
);
650 * Start address is optional - check only if provided
651 * in '$partition' variable
653 if (!partitions
[i
].start
) {
658 /* Check if GPT and ENV start LBAs match */
659 debug("start LBA - GPT: %8llu, ENV: %8llu\n",
660 le64_to_cpu(gpt_e
[i
].starting_lba
),
661 (unsigned long long)partitions
[i
].start
);
663 if (le64_to_cpu(gpt_e
[i
].starting_lba
) != partitions
[i
].start
) {
664 error("Partition %s start: %llu does not match %llu!\n",
665 efi_str
, le64_to_cpu(gpt_e
[i
].starting_lba
),
666 (unsigned long long)partitions
[i
].start
);
674 int is_valid_gpt_buf(struct blk_desc
*dev_desc
, void *buf
)
679 /* determine start of GPT Header in the buffer */
680 gpt_h
= buf
+ (GPT_PRIMARY_PARTITION_TABLE_LBA
*
682 if (validate_gpt_header(gpt_h
, GPT_PRIMARY_PARTITION_TABLE_LBA
,
686 /* determine start of GPT Entries in the buffer */
687 gpt_e
= buf
+ (le64_to_cpu(gpt_h
->partition_entry_lba
) *
689 if (validate_gpt_entries(gpt_h
, gpt_e
))
695 int write_mbr_and_gpt_partitions(struct blk_desc
*dev_desc
, void *buf
)
703 if (is_valid_gpt_buf(dev_desc
, buf
))
706 /* determine start of GPT Header in the buffer */
707 gpt_h
= buf
+ (GPT_PRIMARY_PARTITION_TABLE_LBA
*
710 /* determine start of GPT Entries in the buffer */
711 gpt_e
= buf
+ (le64_to_cpu(gpt_h
->partition_entry_lba
) *
713 gpt_e_blk_cnt
= BLOCK_CNT((le32_to_cpu(gpt_h
->num_partition_entries
) *
714 le32_to_cpu(gpt_h
->sizeof_partition_entry
)),
718 lba
= 0; /* MBR is always at 0 */
719 cnt
= 1; /* MBR (1 block) */
720 if (blk_dwrite(dev_desc
, lba
, cnt
, buf
) != cnt
) {
721 printf("%s: failed writing '%s' (%d blks at 0x" LBAF
")\n",
722 __func__
, "MBR", cnt
, lba
);
726 /* write Primary GPT */
727 lba
= GPT_PRIMARY_PARTITION_TABLE_LBA
;
728 cnt
= 1; /* GPT Header (1 block) */
729 if (blk_dwrite(dev_desc
, lba
, cnt
, gpt_h
) != cnt
) {
730 printf("%s: failed writing '%s' (%d blks at 0x" LBAF
")\n",
731 __func__
, "Primary GPT Header", cnt
, lba
);
735 lba
= le64_to_cpu(gpt_h
->partition_entry_lba
);
737 if (blk_dwrite(dev_desc
, lba
, cnt
, gpt_e
) != cnt
) {
738 printf("%s: failed writing '%s' (%d blks at 0x" LBAF
")\n",
739 __func__
, "Primary GPT Entries", cnt
, lba
);
743 prepare_backup_gpt_header(gpt_h
);
745 /* write Backup GPT */
746 lba
= le64_to_cpu(gpt_h
->partition_entry_lba
);
748 if (blk_dwrite(dev_desc
, lba
, cnt
, gpt_e
) != cnt
) {
749 printf("%s: failed writing '%s' (%d blks at 0x" LBAF
")\n",
750 __func__
, "Backup GPT Entries", cnt
, lba
);
754 lba
= le64_to_cpu(gpt_h
->my_lba
);
755 cnt
= 1; /* GPT Header (1 block) */
756 if (blk_dwrite(dev_desc
, lba
, cnt
, gpt_h
) != cnt
) {
757 printf("%s: failed writing '%s' (%d blks at 0x" LBAF
")\n",
758 __func__
, "Backup GPT Header", cnt
, lba
);
770 * pmbr_part_valid(): Check for EFI partition signature
772 * Returns: 1 if EFI GPT partition type is found.
774 static int pmbr_part_valid(struct partition
*part
)
776 if (part
->sys_ind
== EFI_PMBR_OSTYPE_EFI_GPT
&&
777 get_unaligned_le32(&part
->start_sect
) == 1UL) {
785 * is_pmbr_valid(): test Protective MBR for validity
787 * Returns: 1 if PMBR is valid, 0 otherwise.
788 * Validity depends on two things:
789 * 1) MSDOS signature is in the last two bytes of the MBR
790 * 2) One partition of type 0xEE is found, checked by pmbr_part_valid()
792 static int is_pmbr_valid(legacy_mbr
* mbr
)
796 if (!mbr
|| le16_to_cpu(mbr
->signature
) != MSDOS_MBR_SIGNATURE
)
799 for (i
= 0; i
< 4; i
++) {
800 if (pmbr_part_valid(&mbr
->partition_record
[i
])) {
808 * is_gpt_valid() - tests one GPT header and PTEs for validity
810 * lba is the logical block address of the GPT header to test
811 * gpt is a GPT header ptr, filled on return.
812 * ptes is a PTEs ptr, filled on return.
814 * Description: returns 1 if valid, 0 on error.
815 * If valid, returns pointers to PTEs.
817 static int is_gpt_valid(struct blk_desc
*dev_desc
, u64 lba
,
818 gpt_header
*pgpt_head
, gpt_entry
**pgpt_pte
)
820 if (!dev_desc
|| !pgpt_head
) {
821 printf("%s: Invalid Argument(s)\n", __func__
);
825 /* Read GPT Header from device */
826 if (blk_dread(dev_desc
, (lbaint_t
)lba
, 1, pgpt_head
) != 1) {
827 printf("*** ERROR: Can't read GPT header ***\n");
831 if (validate_gpt_header(pgpt_head
, (lbaint_t
)lba
, dev_desc
->lba
))
834 /* Read and allocate Partition Table Entries */
835 *pgpt_pte
= alloc_read_gpt_entries(dev_desc
, pgpt_head
);
836 if (*pgpt_pte
== NULL
) {
837 printf("GPT: Failed to allocate memory for PTE\n");
841 if (validate_gpt_entries(pgpt_head
, *pgpt_pte
)) {
846 /* We're done, all's well */
851 * alloc_read_gpt_entries(): reads partition entries from disk
855 * Description: Returns ptes on success, NULL on error.
856 * Allocates space for PTEs based on information found in @gpt.
857 * Notes: remember to free pte when you're done!
859 static gpt_entry
*alloc_read_gpt_entries(struct blk_desc
*dev_desc
,
860 gpt_header
*pgpt_head
)
862 size_t count
= 0, blk_cnt
;
864 gpt_entry
*pte
= NULL
;
866 if (!dev_desc
|| !pgpt_head
) {
867 printf("%s: Invalid Argument(s)\n", __func__
);
871 count
= le32_to_cpu(pgpt_head
->num_partition_entries
) *
872 le32_to_cpu(pgpt_head
->sizeof_partition_entry
);
874 debug("%s: count = %u * %u = %lu\n", __func__
,
875 (u32
) le32_to_cpu(pgpt_head
->num_partition_entries
),
876 (u32
) le32_to_cpu(pgpt_head
->sizeof_partition_entry
),
879 /* Allocate memory for PTE, remember to FREE */
881 pte
= memalign(ARCH_DMA_MINALIGN
,
882 PAD_TO_BLOCKSIZE(count
, dev_desc
));
885 if (count
== 0 || pte
== NULL
) {
886 printf("%s: ERROR: Can't allocate %#lX bytes for GPT Entries\n",
887 __func__
, (ulong
)count
);
891 /* Read GPT Entries from device */
892 blk
= le64_to_cpu(pgpt_head
->partition_entry_lba
);
893 blk_cnt
= BLOCK_CNT(count
, dev_desc
);
894 if (blk_dread(dev_desc
, blk
, (lbaint_t
)blk_cnt
, pte
) != blk_cnt
) {
895 printf("*** ERROR: Can't read GPT Entries ***\n");
903 * is_pte_valid(): validates a single Partition Table Entry
904 * @gpt_entry - Pointer to a single Partition Table Entry
906 * Description: returns 1 if valid, 0 on error.
908 static int is_pte_valid(gpt_entry
* pte
)
910 efi_guid_t unused_guid
;
913 printf("%s: Invalid Argument(s)\n", __func__
);
917 /* Only one validation for now:
918 * The GUID Partition Type != Unused Entry (ALL-ZERO)
920 memset(unused_guid
.b
, 0, sizeof(unused_guid
.b
));
922 if (memcmp(pte
->partition_type_guid
.b
, unused_guid
.b
,
923 sizeof(unused_guid
.b
)) == 0) {
925 debug("%s: Found an unused PTE GUID at 0x%08X\n", __func__
,
926 (unsigned int)(uintptr_t)pte
);
935 * Add an 'a_' prefix so it comes before 'dos' in the linker list. We need to
936 * check EFI first, since a DOS partition is often used as a 'protective MBR'
939 U_BOOT_PART_TYPE(a_efi
) = {
941 .part_type
= PART_TYPE_EFI
,
942 .max_entries
= GPT_ENTRY_NUMBERS
,
943 .get_info
= part_get_info_ptr(part_get_info_efi
),
944 .print
= part_print_ptr(part_print_efi
),
945 .test
= part_test_efi
,