1 // SPDX-License-Identifier: GPL-2.0+
3 * Copyright (C) 2008 RuggedCom, Inc.
4 * Richard Retanubun <RichardRetanubun@RuggedCom.com>
9 * when CONFIG_SYS_64BIT_LBA is not defined, lbaint_t is 32 bits; this
10 * limits the maximum size of addressable storage to < 2 tebibytes
17 #include <asm/cache.h>
18 #include <asm/global_data.h>
19 #include <asm/unaligned.h>
26 #include <dm/ofnode.h>
27 #include <linux/compiler.h>
28 #include <linux/ctype.h>
29 #include <u-boot/crc.h>
31 /* GUID for basic data partitons */
32 #if CONFIG_IS_ENABLED(EFI_PARTITION)
33 static const efi_guid_t partition_basic_data_guid
= PARTITION_BASIC_DATA_GUID
;
37 * efi_crc32() - EFI version of crc32 function
38 * @buf: buffer to calculate crc32 of
39 * @len - length of buf
41 * Description: Returns EFI-style CRC32 value for @buf
43 static inline u32
efi_crc32(const void *buf
, u32 len
)
45 return crc32(0, buf
, len
);
49 * Private function prototypes
52 static int pmbr_part_valid(struct partition
*part
);
53 static int is_pmbr_valid(legacy_mbr
* mbr
);
54 static int is_gpt_valid(struct blk_desc
*desc
, u64 lba
, gpt_header
*pgpt_head
,
55 gpt_entry
**pgpt_pte
);
56 static gpt_entry
*alloc_read_gpt_entries(struct blk_desc
*desc
,
57 gpt_header
*pgpt_head
);
58 static int is_pte_valid(gpt_entry
* pte
);
59 static int find_valid_gpt(struct blk_desc
*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
*desc
, char *guid
)
200 ALLOC_CACHE_ALIGN_BUFFER_PAD(gpt_header
, gpt_head
, 1, 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(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
*desc
)
218 ALLOC_CACHE_ALIGN_BUFFER_PAD(gpt_header
, gpt_head
, 1, 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(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
*desc
, int part
,
259 struct disk_partition
*info
)
261 ALLOC_CACHE_ALIGN_BUFFER_PAD(gpt_header
, gpt_head
, 1, 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(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
= 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
*desc
)
311 ALLOC_CACHE_ALIGN_BUFFER_PAD(legacy_mbr
, legacymbr
, 1, desc
->blksz
);
313 /* Read legacy MBR from block 0 and validate it */
314 if ((blk_dread(desc
, 0, 1, (ulong
*)legacymbr
) != 1)
315 || (is_pmbr_valid(legacymbr
) != 1)) {
322 * set_protective_mbr(): Set the EFI protective MBR
323 * @param desc - block device descriptor
325 * Return: - zero on success, otherwise error
327 static int set_protective_mbr(struct blk_desc
*desc
)
329 /* Setup the Protective MBR */
330 ALLOC_CACHE_ALIGN_BUFFER_PAD(legacy_mbr
, p_mbr
, 1, desc
->blksz
);
332 log_debug("calloc failed!\n");
336 /* Read MBR to backup boot code if it exists */
337 if (blk_dread(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
)desc
->lba
- 1;
353 /* Write MBR sector to the MMC device */
354 if (blk_dwrite(desc
, 0, 1, p_mbr
) != 1) {
355 log_debug("** Can't write to device %d **\n", desc
->devnum
);
362 int write_gpt_table(struct blk_desc
*desc
, gpt_header
*gpt_h
, gpt_entry
*gpt_e
)
364 const int pte_blk_cnt
= BLOCK_CNT((gpt_h
->num_partition_entries
365 * sizeof(gpt_entry
)), desc
);
368 debug("max lba: %x\n", (u32
)desc
->lba
);
369 /* Setup the Protective MBR */
370 if (set_protective_mbr(desc
) < 0)
373 /* Generate CRC for the Primary GPT Header */
374 calc_crc32
= efi_crc32((const unsigned char *)gpt_e
,
375 le32_to_cpu(gpt_h
->num_partition_entries
) *
376 le32_to_cpu(gpt_h
->sizeof_partition_entry
));
377 gpt_h
->partition_entry_array_crc32
= cpu_to_le32(calc_crc32
);
379 calc_crc32
= efi_crc32((const unsigned char *)gpt_h
,
380 le32_to_cpu(gpt_h
->header_size
));
381 gpt_h
->header_crc32
= cpu_to_le32(calc_crc32
);
383 /* Write the First GPT to the block right after the Legacy MBR */
384 if (blk_dwrite(desc
, 1, 1, gpt_h
) != 1)
387 if (blk_dwrite(desc
, le64_to_cpu(gpt_h
->partition_entry_lba
),
388 pte_blk_cnt
, gpt_e
) != pte_blk_cnt
)
391 prepare_backup_gpt_header(gpt_h
);
393 if (blk_dwrite(desc
, (lbaint_t
)le64_to_cpu(gpt_h
->last_usable_lba
)
394 + 1, pte_blk_cnt
, gpt_e
) != pte_blk_cnt
)
397 if (blk_dwrite(desc
, (lbaint_t
)le64_to_cpu(gpt_h
->my_lba
), 1,
401 debug("GPT successfully written to block device!\n");
405 log_debug("** Can't write to device %d **\n", desc
->devnum
);
409 int gpt_fill_pte(struct blk_desc
*desc
,
410 gpt_header
*gpt_h
, gpt_entry
*gpt_e
,
411 struct disk_partition
*partitions
, int parts
)
413 lbaint_t offset
= (lbaint_t
)le64_to_cpu(gpt_h
->first_usable_lba
);
414 lbaint_t last_usable_lba
= (lbaint_t
)
415 le64_to_cpu(gpt_h
->last_usable_lba
);
417 size_t efiname_len
, dosname_len
;
418 #if CONFIG_IS_ENABLED(PARTITION_UUIDS)
420 unsigned char *bin_uuid
;
422 #ifdef CONFIG_PARTITION_TYPE_GUID
424 unsigned char *bin_type_guid
;
426 size_t hdr_start
= gpt_h
->my_lba
;
427 size_t hdr_end
= hdr_start
+ 1;
429 size_t pte_start
= gpt_h
->partition_entry_lba
;
430 size_t pte_end
= pte_start
+
431 gpt_h
->num_partition_entries
* gpt_h
->sizeof_partition_entry
/
434 for (i
= 0; i
< parts
; i
++) {
435 /* partition starting lba */
436 lbaint_t start
= partitions
[i
].start
;
437 lbaint_t size
= partitions
[i
].size
;
440 offset
= start
+ size
;
447 * If our partition overlaps with either the GPT
448 * header, or the partition entry, reject it.
450 if (((start
< hdr_end
&& hdr_start
< (start
+ size
)) ||
451 (start
< pte_end
&& pte_start
< (start
+ size
)))) {
452 log_debug("Partition overlap\n");
456 gpt_e
[i
].starting_lba
= cpu_to_le64(start
);
458 if (offset
> (last_usable_lba
+ 1)) {
459 log_debug("Partitions layout exceeds disk size\n");
462 /* partition ending lba */
463 if ((i
== parts
- 1) && (size
== 0))
464 /* extend the last partition to maximuim */
465 gpt_e
[i
].ending_lba
= gpt_h
->last_usable_lba
;
467 gpt_e
[i
].ending_lba
= cpu_to_le64(offset
- 1);
469 #ifdef CONFIG_PARTITION_TYPE_GUID
470 str_type_guid
= partitions
[i
].type_guid
;
471 bin_type_guid
= gpt_e
[i
].partition_type_guid
.b
;
472 if (strlen(str_type_guid
)) {
473 if (uuid_str_to_bin(str_type_guid
, bin_type_guid
,
474 UUID_STR_FORMAT_GUID
)) {
475 log_debug("Partition no. %d: invalid type guid: %s\n",
480 /* default partition type GUID */
481 memcpy(bin_type_guid
,
482 &partition_basic_data_guid
, 16);
485 /* partition type GUID */
486 memcpy(gpt_e
[i
].partition_type_guid
.b
,
487 &partition_basic_data_guid
, 16);
490 #if CONFIG_IS_ENABLED(PARTITION_UUIDS)
491 str_uuid
= partitions
[i
].uuid
;
492 bin_uuid
= gpt_e
[i
].unique_partition_guid
.b
;
494 if (uuid_str_to_bin(str_uuid
, bin_uuid
, UUID_STR_FORMAT_GUID
)) {
495 log_debug("Partition no. %d: invalid guid: %s\n",
501 /* partition attributes */
502 memset(&gpt_e
[i
].attributes
, 0,
503 sizeof(gpt_entry_attributes
));
505 if (partitions
[i
].bootable
& PART_BOOTABLE
)
506 gpt_e
[i
].attributes
.fields
.legacy_bios_bootable
= 1;
509 efiname_len
= sizeof(gpt_e
[i
].partition_name
)
510 / sizeof(efi_char16_t
);
511 dosname_len
= sizeof(partitions
[i
].name
);
513 memset(gpt_e
[i
].partition_name
, 0,
514 sizeof(gpt_e
[i
].partition_name
));
516 for (k
= 0; k
< min(dosname_len
, efiname_len
); k
++)
517 gpt_e
[i
].partition_name
[k
] =
518 (efi_char16_t
)(partitions
[i
].name
[k
]);
520 debug("%s: name: %s offset[%d]: 0x" LBAF
521 " size[%d]: 0x" LBAF
"\n",
522 __func__
, partitions
[i
].name
, i
,
529 static uint32_t partition_entries_offset(struct blk_desc
*desc
)
531 uint32_t offset_blks
= 2;
532 uint32_t __maybe_unused offset_bytes
;
533 int __maybe_unused config_offset
;
535 #if defined(CONFIG_EFI_PARTITION_ENTRIES_OFF)
537 * Some architectures require their SPL loader at a fixed
538 * address within the first 16KB of the disk. To avoid an
539 * overlap with the partition entries of the EFI partition
540 * table, the first safe offset (in bytes, from the start of
541 * the disk) for the entries can be set in
542 * CONFIG_EFI_PARTITION_ENTRIES_OFF.
545 PAD_TO_BLOCKSIZE(CONFIG_EFI_PARTITION_ENTRIES_OFF
, desc
);
546 offset_blks
= offset_bytes
/ desc
->blksz
;
549 #if defined(CONFIG_OF_CONTROL)
551 * Allow the offset of the first partition entires (in bytes
552 * from the start of the device) to be specified as a property
553 * of the device tree '/config' node.
555 config_offset
= ofnode_conf_read_int(
556 "u-boot,efi-partition-entries-offset", -EINVAL
);
557 if (config_offset
!= -EINVAL
) {
558 offset_bytes
= PAD_TO_BLOCKSIZE(config_offset
, desc
);
559 offset_blks
= offset_bytes
/ desc
->blksz
;
563 debug("efi: partition entries offset (in blocks): %d\n", offset_blks
);
566 * The earliest LBA this can be at is LBA#2 (i.e. right behind
567 * the (protective) MBR and the GPT header.
575 int gpt_fill_header(struct blk_desc
*desc
, gpt_header
*gpt_h
, char *str_guid
,
578 gpt_h
->signature
= cpu_to_le64(GPT_HEADER_SIGNATURE_UBOOT
);
579 gpt_h
->revision
= cpu_to_le32(GPT_HEADER_REVISION_V1
);
580 gpt_h
->header_size
= cpu_to_le32(sizeof(gpt_header
));
581 gpt_h
->my_lba
= cpu_to_le64(1);
582 gpt_h
->alternate_lba
= cpu_to_le64(desc
->lba
- 1);
583 gpt_h
->last_usable_lba
= cpu_to_le64(desc
->lba
- 34);
584 gpt_h
->partition_entry_lba
=
585 cpu_to_le64(partition_entries_offset(desc
));
586 gpt_h
->first_usable_lba
=
587 cpu_to_le64(le64_to_cpu(gpt_h
->partition_entry_lba
) + 32);
588 gpt_h
->num_partition_entries
= cpu_to_le32(GPT_ENTRY_NUMBERS
);
589 gpt_h
->sizeof_partition_entry
= cpu_to_le32(sizeof(gpt_entry
));
590 gpt_h
->header_crc32
= 0;
591 gpt_h
->partition_entry_array_crc32
= 0;
593 if (uuid_str_to_bin(str_guid
, gpt_h
->disk_guid
.b
, UUID_STR_FORMAT_GUID
))
599 int gpt_restore(struct blk_desc
*desc
, char *str_disk_guid
,
600 struct disk_partition
*partitions
, int parts_count
)
606 size
= PAD_TO_BLOCKSIZE(sizeof(gpt_header
), desc
);
607 gpt_h
= malloc_cache_aligned(size
);
609 log_debug("calloc failed!\n");
612 memset(gpt_h
, 0, size
);
614 size
= PAD_TO_BLOCKSIZE(GPT_ENTRY_NUMBERS
* sizeof(gpt_entry
),
616 gpt_e
= malloc_cache_aligned(size
);
618 log_debug("calloc failed!\n");
622 memset(gpt_e
, 0, size
);
624 /* Generate Primary GPT header (LBA1) */
625 ret
= gpt_fill_header(desc
, gpt_h
, str_disk_guid
, parts_count
);
629 /* Generate partition entries */
630 ret
= gpt_fill_pte(desc
, gpt_h
, gpt_e
, partitions
, parts_count
);
634 /* Write GPT partition table */
635 ret
= write_gpt_table(desc
, gpt_h
, gpt_e
);
644 * gpt_convert_efi_name_to_char() - convert u16 string to char string
646 * TODO: this conversion only supports ANSI characters
649 * @es: u16 string to be converted
650 * @n: size of target buffer
652 static void gpt_convert_efi_name_to_char(char *s
, void *es
, int n
)
659 for (i
= 0, j
= 0; j
< n
; i
+= 2, j
++) {
666 int gpt_verify_headers(struct blk_desc
*desc
, gpt_header
*gpt_head
,
670 * This function validates AND
671 * fills in the GPT header and PTE
673 if (is_gpt_valid(desc
,
674 GPT_PRIMARY_PARTITION_TABLE_LBA
,
675 gpt_head
, gpt_pte
) != 1) {
676 log_debug("Invalid GPT\n");
680 /* Free pte before allocating again */
684 * Check that the alternate_lba entry points to the last LBA
686 if (le64_to_cpu(gpt_head
->alternate_lba
) != (desc
->lba
- 1)) {
687 log_debug("Misplaced Backup GPT\n");
691 if (is_gpt_valid(desc
, (desc
->lba
- 1),
692 gpt_head
, gpt_pte
) != 1) {
693 log_debug("Invalid Backup GPT\n");
700 static void restore_primary_gpt_header(gpt_header
*gpt_h
, struct blk_desc
*desc
)
705 /* recalculate the values for the Primary GPT Header */
706 val
= le64_to_cpu(gpt_h
->my_lba
);
707 gpt_h
->my_lba
= gpt_h
->alternate_lba
;
708 gpt_h
->alternate_lba
= cpu_to_le64(val
);
709 gpt_h
->partition_entry_lba
= cpu_to_le64(partition_entries_offset(desc
));
711 gpt_h
->header_crc32
= 0;
713 calc_crc32
= efi_crc32((const unsigned char *)gpt_h
,
714 le32_to_cpu(gpt_h
->header_size
));
715 gpt_h
->header_crc32
= cpu_to_le32(calc_crc32
);
718 static int write_one_gpt_table(struct blk_desc
*desc
, gpt_header
*gpt_h
,
721 const int pte_blk_cnt
= BLOCK_CNT((gpt_h
->num_partition_entries
722 * sizeof(gpt_entry
)), desc
);
726 start
= le64_to_cpu(gpt_h
->my_lba
);
727 if (blk_dwrite(desc
, start
, 1, gpt_h
) != 1) {
732 start
= le64_to_cpu(gpt_h
->partition_entry_lba
);
733 if (blk_dwrite(desc
, start
, pte_blk_cnt
, gpt_e
) != pte_blk_cnt
) {
742 int gpt_repair_headers(struct blk_desc
*desc
)
744 ALLOC_CACHE_ALIGN_BUFFER_PAD(gpt_header
, gpt_h1
, 1, desc
->blksz
);
745 ALLOC_CACHE_ALIGN_BUFFER_PAD(gpt_header
, gpt_h2
, 1, desc
->blksz
);
746 gpt_entry
*gpt_e1
= NULL
, *gpt_e2
= NULL
;
747 int is_gpt1_valid
, is_gpt2_valid
;
750 is_gpt1_valid
= is_gpt_valid(desc
, GPT_PRIMARY_PARTITION_TABLE_LBA
,
752 is_gpt2_valid
= is_gpt_valid(desc
, desc
->lba
- 1,
755 if (is_gpt1_valid
&& is_gpt2_valid
) {
760 if (is_gpt1_valid
&& !is_gpt2_valid
) {
761 prepare_backup_gpt_header(gpt_h1
);
762 ret
= write_one_gpt_table(desc
, gpt_h1
, gpt_e1
);
766 if (!is_gpt1_valid
&& is_gpt2_valid
) {
767 restore_primary_gpt_header(gpt_h2
, desc
);
768 ret
= write_one_gpt_table(desc
, gpt_h2
, gpt_e2
);
772 if (!is_gpt1_valid
&& !is_gpt2_valid
) {
786 int gpt_verify_partitions(struct blk_desc
*desc
,
787 struct disk_partition
*partitions
, int parts
,
788 gpt_header
*gpt_head
, gpt_entry
**gpt_pte
)
790 char efi_str
[PARTNAME_SZ
+ 1];
795 ret
= gpt_verify_headers(desc
, gpt_head
, gpt_pte
);
801 for (i
= 0; i
< parts
; i
++) {
802 if (i
== gpt_head
->num_partition_entries
) {
803 pr_err("More partitions than allowed!\n");
807 /* Check if GPT and ENV partition names match */
808 gpt_convert_efi_name_to_char(efi_str
, gpt_e
[i
].partition_name
,
811 debug("%s: part: %2d name - GPT: %16s, ENV: %16s ",
812 __func__
, i
, efi_str
, partitions
[i
].name
);
814 if (strncmp(efi_str
, (char *)partitions
[i
].name
,
815 sizeof(partitions
->name
))) {
816 pr_err("Partition name: %s does not match %s!\n",
817 efi_str
, (char *)partitions
[i
].name
);
821 /* Check if GPT and ENV sizes match */
822 gpt_part_size
= le64_to_cpu(gpt_e
[i
].ending_lba
) -
823 le64_to_cpu(gpt_e
[i
].starting_lba
) + 1;
824 debug("size(LBA) - GPT: %8llu, ENV: %8llu ",
825 (unsigned long long)gpt_part_size
,
826 (unsigned long long)partitions
[i
].size
);
828 if (le64_to_cpu(gpt_part_size
) != partitions
[i
].size
) {
829 /* We do not check the extend partition size */
830 if ((i
== parts
- 1) && (partitions
[i
].size
== 0))
833 pr_err("Partition %s size: %llu does not match %llu!\n",
834 efi_str
, (unsigned long long)gpt_part_size
,
835 (unsigned long long)partitions
[i
].size
);
840 * Start address is optional - check only if provided
841 * in '$partition' variable
843 if (!partitions
[i
].start
) {
848 /* Check if GPT and ENV start LBAs match */
849 debug("start LBA - GPT: %8llu, ENV: %8llu\n",
850 le64_to_cpu(gpt_e
[i
].starting_lba
),
851 (unsigned long long)partitions
[i
].start
);
853 if (le64_to_cpu(gpt_e
[i
].starting_lba
) != partitions
[i
].start
) {
854 pr_err("Partition %s start: %llu does not match %llu!\n",
855 efi_str
, le64_to_cpu(gpt_e
[i
].starting_lba
),
856 (unsigned long long)partitions
[i
].start
);
864 int is_valid_gpt_buf(struct blk_desc
*desc
, void *buf
)
869 /* determine start of GPT Header in the buffer */
870 gpt_h
= buf
+ (GPT_PRIMARY_PARTITION_TABLE_LBA
* desc
->blksz
);
871 if (validate_gpt_header(gpt_h
, GPT_PRIMARY_PARTITION_TABLE_LBA
,
875 /* determine start of GPT Entries in the buffer */
876 gpt_e
= buf
+ (le64_to_cpu(gpt_h
->partition_entry_lba
) *
878 if (validate_gpt_entries(gpt_h
, gpt_e
))
884 int write_mbr_and_gpt_partitions(struct blk_desc
*desc
, void *buf
)
892 if (is_valid_gpt_buf(desc
, buf
))
895 /* determine start of GPT Header in the buffer */
896 gpt_h
= buf
+ (GPT_PRIMARY_PARTITION_TABLE_LBA
* desc
->blksz
);
898 /* determine start of GPT Entries in the buffer */
899 gpt_e
= buf
+ (le64_to_cpu(gpt_h
->partition_entry_lba
) * desc
->blksz
);
900 gpt_e_blk_cnt
= BLOCK_CNT((le32_to_cpu(gpt_h
->num_partition_entries
) *
901 le32_to_cpu(gpt_h
->sizeof_partition_entry
)),
905 lba
= 0; /* MBR is always at 0 */
906 cnt
= 1; /* MBR (1 block) */
907 if (blk_dwrite(desc
, lba
, cnt
, buf
) != cnt
) {
908 log_debug("failed writing '%s' (%d blks at 0x" LBAF
")\n",
913 /* write Primary GPT */
914 lba
= GPT_PRIMARY_PARTITION_TABLE_LBA
;
915 cnt
= 1; /* GPT Header (1 block) */
916 if (blk_dwrite(desc
, lba
, cnt
, gpt_h
) != cnt
) {
917 log_debug("failed writing '%s' (%d blks at 0x" LBAF
")\n",
918 "Primary GPT Header", cnt
, lba
);
922 lba
= le64_to_cpu(gpt_h
->partition_entry_lba
);
924 if (blk_dwrite(desc
, lba
, cnt
, gpt_e
) != cnt
) {
925 log_debug("failed writing '%s' (%d blks at 0x" LBAF
")\n",
926 "Primary GPT Entries", cnt
, lba
);
930 prepare_backup_gpt_header(gpt_h
);
932 /* write Backup GPT */
933 lba
= le64_to_cpu(gpt_h
->partition_entry_lba
);
935 if (blk_dwrite(desc
, lba
, cnt
, gpt_e
) != cnt
) {
936 log_debug("failed writing '%s' (%d blks at 0x" LBAF
")\n",
937 "Backup GPT Entries", cnt
, lba
);
941 lba
= le64_to_cpu(gpt_h
->my_lba
);
942 cnt
= 1; /* GPT Header (1 block) */
943 if (blk_dwrite(desc
, lba
, cnt
, gpt_h
) != cnt
) {
944 log_debug("failed writing '%s' (%d blks at 0x" LBAF
")\n",
945 "Backup GPT Header", cnt
, lba
);
949 /* Update the partition table entries*/
960 * pmbr_part_valid(): Check for EFI partition signature
962 * Returns: 1 if EFI GPT partition type is found.
964 static int pmbr_part_valid(struct partition
*part
)
966 if (part
->sys_ind
== EFI_PMBR_OSTYPE_EFI_GPT
&&
967 get_unaligned_le32(&part
->start_sect
) == 1UL) {
975 * is_pmbr_valid(): test Protective MBR for validity
977 * Returns: 1 if PMBR is valid, 0 otherwise.
978 * Validity depends on two things:
979 * 1) MSDOS signature is in the last two bytes of the MBR
980 * 2) One partition of type 0xEE is found, checked by pmbr_part_valid()
982 static int is_pmbr_valid(legacy_mbr
* mbr
)
986 if (!mbr
|| le16_to_cpu(mbr
->signature
) != MSDOS_MBR_SIGNATURE
)
989 for (i
= 0; i
< 4; i
++) {
990 if (pmbr_part_valid(&mbr
->partition_record
[i
])) {
998 * is_gpt_valid() - tests one GPT header and PTEs for validity
1000 * lba is the logical block address of the GPT header to test
1001 * gpt is a GPT header ptr, filled on return.
1002 * ptes is a PTEs ptr, filled on return.
1004 * Description: returns 1 if valid, 0 on error, 2 if ignored header
1005 * If valid, returns pointers to PTEs.
1007 static int is_gpt_valid(struct blk_desc
*desc
, u64 lba
, gpt_header
*pgpt_head
,
1008 gpt_entry
**pgpt_pte
)
1010 /* Confirm valid arguments prior to allocation. */
1011 if (!desc
|| !pgpt_head
) {
1012 log_debug("Invalid Argument(s)\n");
1016 ALLOC_CACHE_ALIGN_BUFFER_PAD(legacy_mbr
, mbr
, 1, desc
->blksz
);
1018 /* Read MBR Header from device */
1019 if (blk_dread(desc
, 0, 1, (ulong
*)mbr
) != 1) {
1020 log_debug("Can't read MBR header\n");
1024 /* Read GPT Header from device */
1025 if (blk_dread(desc
, (lbaint_t
)lba
, 1, pgpt_head
) != 1) {
1026 log_debug("Can't read GPT header\n");
1030 /* Invalid but nothing to yell about. */
1031 if (le64_to_cpu(pgpt_head
->signature
) == GPT_HEADER_CHROMEOS_IGNORE
) {
1032 log_debug("ChromeOS 'IGNOREME' GPT header found and ignored\n");
1036 if (validate_gpt_header(pgpt_head
, (lbaint_t
)lba
, desc
->lba
))
1039 if (desc
->sig_type
== SIG_TYPE_NONE
) {
1040 efi_guid_t empty
= {};
1041 if (memcmp(&pgpt_head
->disk_guid
, &empty
, sizeof(empty
))) {
1042 desc
->sig_type
= SIG_TYPE_GUID
;
1043 memcpy(&desc
->guid_sig
, &pgpt_head
->disk_guid
,
1045 } else if (mbr
->unique_mbr_signature
!= 0) {
1046 desc
->sig_type
= SIG_TYPE_MBR
;
1047 desc
->mbr_sig
= mbr
->unique_mbr_signature
;
1051 /* Read and allocate Partition Table Entries */
1052 *pgpt_pte
= alloc_read_gpt_entries(desc
, pgpt_head
);
1056 if (validate_gpt_entries(pgpt_head
, *pgpt_pte
)) {
1061 /* We're done, all's well */
1066 * find_valid_gpt() - finds a valid GPT header and PTEs
1068 * gpt is a GPT header ptr, filled on return.
1069 * ptes is a PTEs ptr, filled on return.
1071 * Description: returns 1 if found a valid gpt, 0 on error.
1072 * If valid, returns pointers to PTEs.
1074 static int find_valid_gpt(struct blk_desc
*desc
, gpt_header
*gpt_head
,
1075 gpt_entry
**pgpt_pte
)
1079 r
= is_gpt_valid(desc
, GPT_PRIMARY_PARTITION_TABLE_LBA
, gpt_head
,
1084 log_debug("Invalid GPT\n");
1086 if (is_gpt_valid(desc
, desc
->lba
- 1, gpt_head
, pgpt_pte
)
1088 log_debug("Invalid Backup GPT\n");
1092 log_debug(" Using Backup GPT\n");
1098 * alloc_read_gpt_entries(): reads partition entries from disk
1102 * Description: Returns ptes on success, NULL on error.
1103 * Allocates space for PTEs based on information found in @gpt.
1104 * Notes: remember to free pte when you're done!
1106 static gpt_entry
*alloc_read_gpt_entries(struct blk_desc
*desc
,
1107 gpt_header
*pgpt_head
)
1109 size_t count
= 0, blk_cnt
;
1111 gpt_entry
*pte
= NULL
;
1113 if (!desc
|| !pgpt_head
) {
1114 log_debug("Invalid Argument(s)\n");
1118 count
= le32_to_cpu(pgpt_head
->num_partition_entries
) *
1119 le32_to_cpu(pgpt_head
->sizeof_partition_entry
);
1121 log_debug("count = %u * %u = %lu\n",
1122 (u32
)le32_to_cpu(pgpt_head
->num_partition_entries
),
1123 (u32
)le32_to_cpu(pgpt_head
->sizeof_partition_entry
),
1126 /* Allocate memory for PTE, remember to FREE */
1128 pte
= memalign(ARCH_DMA_MINALIGN
,
1129 PAD_TO_BLOCKSIZE(count
, desc
));
1132 if (count
== 0 || pte
== NULL
) {
1133 log_debug("ERROR: Can't allocate %#lX bytes for GPT Entries\n",
1138 /* Read GPT Entries from device */
1139 blk
= le64_to_cpu(pgpt_head
->partition_entry_lba
);
1140 blk_cnt
= BLOCK_CNT(count
, desc
);
1141 if (blk_dread(desc
, blk
, (lbaint_t
)blk_cnt
, pte
) != blk_cnt
) {
1142 log_debug("Can't read GPT Entries\n");
1150 * is_pte_valid(): validates a single Partition Table Entry
1151 * @gpt_entry - Pointer to a single Partition Table Entry
1153 * Description: returns 1 if valid, 0 on error.
1155 static int is_pte_valid(gpt_entry
* pte
)
1157 efi_guid_t unused_guid
;
1160 log_debug("Invalid Argument(s)\n");
1164 /* Only one validation for now:
1165 * The GUID Partition Type != Unused Entry (ALL-ZERO)
1167 memset(unused_guid
.b
, 0, sizeof(unused_guid
.b
));
1169 if (memcmp(pte
->partition_type_guid
.b
, unused_guid
.b
,
1170 sizeof(unused_guid
.b
)) == 0) {
1172 log_debug("Found an unused PTE GUID at 0x%08X\n",
1173 (unsigned int)(uintptr_t)pte
);
1182 * Add an 'a_' prefix so it comes before 'dos' in the linker list. We need to
1183 * check EFI first, since a DOS partition is often used as a 'protective MBR'
1186 U_BOOT_PART_TYPE(a_efi
) = {
1188 .part_type
= PART_TYPE_EFI
,
1189 .max_entries
= GPT_ENTRY_NUMBERS
,
1190 .get_info
= part_get_info_ptr(part_get_info_efi
),
1191 .print
= part_print_ptr(part_print_efi
),
1192 .test
= part_test_efi
,