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
);
55 static char *print_efiname(gpt_entry
*pte
)
57 static char name
[PARTNAME_SZ
+ 1];
59 for (i
= 0; i
< PARTNAME_SZ
; i
++) {
61 c
= pte
->partition_name
[i
] & 0xff;
62 c
= (c
&& !isprint(c
)) ? '.' : c
;
65 name
[PARTNAME_SZ
] = 0;
69 static const efi_guid_t system_guid
= PARTITION_SYSTEM_GUID
;
71 static inline int is_bootable(gpt_entry
*p
)
73 return p
->attributes
.fields
.legacy_bios_bootable
||
74 !memcmp(&(p
->partition_type_guid
), &system_guid
,
78 static int validate_gpt_header(gpt_header
*gpt_h
, lbaint_t lba
,
81 uint32_t crc32_backup
= 0;
84 /* Check the GPT header signature */
85 if (le64_to_cpu(gpt_h
->signature
) != GPT_HEADER_SIGNATURE_UBOOT
) {
86 printf("%s signature is wrong: 0x%llX != 0x%llX\n",
87 "GUID Partition Table Header",
88 le64_to_cpu(gpt_h
->signature
),
89 GPT_HEADER_SIGNATURE_UBOOT
);
93 /* Check the GUID Partition Table CRC */
94 memcpy(&crc32_backup
, &gpt_h
->header_crc32
, sizeof(crc32_backup
));
95 memset(&gpt_h
->header_crc32
, 0, sizeof(gpt_h
->header_crc32
));
97 calc_crc32
= efi_crc32((const unsigned char *)gpt_h
,
98 le32_to_cpu(gpt_h
->header_size
));
100 memcpy(&gpt_h
->header_crc32
, &crc32_backup
, sizeof(crc32_backup
));
102 if (calc_crc32
!= le32_to_cpu(crc32_backup
)) {
103 printf("%s CRC is wrong: 0x%x != 0x%x\n",
104 "GUID Partition Table Header",
105 le32_to_cpu(crc32_backup
), calc_crc32
);
110 * Check that the my_lba entry points to the LBA that contains the GPT
112 if (le64_to_cpu(gpt_h
->my_lba
) != lba
) {
113 printf("GPT: my_lba incorrect: %llX != " LBAF
"\n",
114 le64_to_cpu(gpt_h
->my_lba
),
120 * Check that the first_usable_lba and that the last_usable_lba are
123 if (le64_to_cpu(gpt_h
->first_usable_lba
) > lastlba
) {
124 printf("GPT: first_usable_lba incorrect: %llX > " LBAF
"\n",
125 le64_to_cpu(gpt_h
->first_usable_lba
), lastlba
);
128 if (le64_to_cpu(gpt_h
->last_usable_lba
) > lastlba
) {
129 printf("GPT: last_usable_lba incorrect: %llX > " LBAF
"\n",
130 le64_to_cpu(gpt_h
->last_usable_lba
), lastlba
);
134 debug("GPT: first_usable_lba: %llX last_usable_lba: %llX last lba: "
135 LBAF
"\n", le64_to_cpu(gpt_h
->first_usable_lba
),
136 le64_to_cpu(gpt_h
->last_usable_lba
), lastlba
);
141 static int validate_gpt_entries(gpt_header
*gpt_h
, gpt_entry
*gpt_e
)
145 /* Check the GUID Partition Table Entry Array CRC */
146 calc_crc32
= efi_crc32((const unsigned char *)gpt_e
,
147 le32_to_cpu(gpt_h
->num_partition_entries
) *
148 le32_to_cpu(gpt_h
->sizeof_partition_entry
));
150 if (calc_crc32
!= le32_to_cpu(gpt_h
->partition_entry_array_crc32
)) {
151 printf("%s: 0x%x != 0x%x\n",
152 "GUID Partition Table Entry Array CRC is wrong",
153 le32_to_cpu(gpt_h
->partition_entry_array_crc32
),
161 static void prepare_backup_gpt_header(gpt_header
*gpt_h
)
166 /* recalculate the values for the Backup GPT Header */
167 val
= le64_to_cpu(gpt_h
->my_lba
);
168 gpt_h
->my_lba
= gpt_h
->alternate_lba
;
169 gpt_h
->alternate_lba
= cpu_to_le64(val
);
170 gpt_h
->partition_entry_lba
=
171 cpu_to_le64(le64_to_cpu(gpt_h
->last_usable_lba
) + 1);
172 gpt_h
->header_crc32
= 0;
174 calc_crc32
= efi_crc32((const unsigned char *)gpt_h
,
175 le32_to_cpu(gpt_h
->header_size
));
176 gpt_h
->header_crc32
= cpu_to_le32(calc_crc32
);
179 #if CONFIG_IS_ENABLED(EFI_PARTITION)
181 * Public Functions (include/part.h)
185 * UUID is displayed as 32 hexadecimal digits, in 5 groups,
186 * separated by hyphens, in the form 8-4-4-4-12 for a total of 36 characters
188 int get_disk_guid(struct blk_desc
* dev_desc
, char *guid
)
190 ALLOC_CACHE_ALIGN_BUFFER_PAD(gpt_header
, gpt_head
, 1, dev_desc
->blksz
);
191 gpt_entry
*gpt_pte
= NULL
;
192 unsigned char *guid_bin
;
194 /* This function validates AND fills in the GPT header and PTE */
195 if (is_gpt_valid(dev_desc
, GPT_PRIMARY_PARTITION_TABLE_LBA
,
196 gpt_head
, &gpt_pte
) != 1) {
197 printf("%s: *** ERROR: Invalid GPT ***\n", __func__
);
198 if (is_gpt_valid(dev_desc
, dev_desc
->lba
- 1,
199 gpt_head
, &gpt_pte
) != 1) {
200 printf("%s: *** ERROR: Invalid Backup GPT ***\n",
204 printf("%s: *** Using Backup GPT ***\n",
209 guid_bin
= gpt_head
->disk_guid
.b
;
210 uuid_bin_to_str(guid_bin
, guid
, UUID_STR_FORMAT_GUID
);
212 /* Remember to free pte */
217 void part_print_efi(struct blk_desc
*dev_desc
)
219 ALLOC_CACHE_ALIGN_BUFFER_PAD(gpt_header
, gpt_head
, 1, dev_desc
->blksz
);
220 gpt_entry
*gpt_pte
= NULL
;
222 char uuid
[UUID_STR_LEN
+ 1];
223 unsigned char *uuid_bin
;
225 /* This function validates AND fills in the GPT header and PTE */
226 if (is_gpt_valid(dev_desc
, GPT_PRIMARY_PARTITION_TABLE_LBA
,
227 gpt_head
, &gpt_pte
) != 1) {
228 printf("%s: *** ERROR: Invalid GPT ***\n", __func__
);
229 if (is_gpt_valid(dev_desc
, (dev_desc
->lba
- 1),
230 gpt_head
, &gpt_pte
) != 1) {
231 printf("%s: *** ERROR: Invalid Backup GPT ***\n",
235 printf("%s: *** Using Backup GPT ***\n",
240 debug("%s: gpt-entry at %p\n", __func__
, gpt_pte
);
242 printf("Part\tStart LBA\tEnd LBA\t\tName\n");
243 printf("\tAttributes\n");
244 printf("\tType GUID\n");
245 printf("\tPartition GUID\n");
247 for (i
= 0; i
< le32_to_cpu(gpt_head
->num_partition_entries
); i
++) {
248 /* Stop at the first non valid PTE */
249 if (!is_pte_valid(&gpt_pte
[i
]))
252 printf("%3d\t0x%08llx\t0x%08llx\t\"%s\"\n", (i
+ 1),
253 le64_to_cpu(gpt_pte
[i
].starting_lba
),
254 le64_to_cpu(gpt_pte
[i
].ending_lba
),
255 print_efiname(&gpt_pte
[i
]));
256 printf("\tattrs:\t0x%016llx\n", gpt_pte
[i
].attributes
.raw
);
257 uuid_bin
= (unsigned char *)gpt_pte
[i
].partition_type_guid
.b
;
258 uuid_bin_to_str(uuid_bin
, uuid
, UUID_STR_FORMAT_GUID
);
259 printf("\ttype:\t%s\n", uuid
);
260 #ifdef CONFIG_PARTITION_TYPE_GUID
261 if (!uuid_guid_get_str(uuid_bin
, uuid
))
262 printf("\ttype:\t%s\n", uuid
);
264 uuid_bin
= (unsigned char *)gpt_pte
[i
].unique_partition_guid
.b
;
265 uuid_bin_to_str(uuid_bin
, uuid
, UUID_STR_FORMAT_GUID
);
266 printf("\tguid:\t%s\n", uuid
);
269 /* Remember to free pte */
274 int part_get_info_efi(struct blk_desc
*dev_desc
, int part
,
275 disk_partition_t
*info
)
277 ALLOC_CACHE_ALIGN_BUFFER_PAD(gpt_header
, gpt_head
, 1, dev_desc
->blksz
);
278 gpt_entry
*gpt_pte
= NULL
;
280 /* "part" argument must be at least 1 */
282 printf("%s: Invalid Argument(s)\n", __func__
);
286 /* This function validates AND fills in the GPT header and PTE */
287 if (is_gpt_valid(dev_desc
, GPT_PRIMARY_PARTITION_TABLE_LBA
,
288 gpt_head
, &gpt_pte
) != 1) {
289 printf("%s: *** ERROR: Invalid GPT ***\n", __func__
);
290 if (is_gpt_valid(dev_desc
, (dev_desc
->lba
- 1),
291 gpt_head
, &gpt_pte
) != 1) {
292 printf("%s: *** ERROR: Invalid Backup GPT ***\n",
296 printf("%s: *** Using Backup GPT ***\n",
301 if (part
> le32_to_cpu(gpt_head
->num_partition_entries
) ||
302 !is_pte_valid(&gpt_pte
[part
- 1])) {
303 debug("%s: *** ERROR: Invalid partition number %d ***\n",
309 /* The 'lbaint_t' casting may limit the maximum disk size to 2 TB */
310 info
->start
= (lbaint_t
)le64_to_cpu(gpt_pte
[part
- 1].starting_lba
);
311 /* The ending LBA is inclusive, to calculate size, add 1 to it */
312 info
->size
= (lbaint_t
)le64_to_cpu(gpt_pte
[part
- 1].ending_lba
) + 1
314 info
->blksz
= dev_desc
->blksz
;
316 sprintf((char *)info
->name
, "%s",
317 print_efiname(&gpt_pte
[part
- 1]));
318 strcpy((char *)info
->type
, "U-Boot");
319 info
->bootable
= is_bootable(&gpt_pte
[part
- 1]);
320 #if CONFIG_IS_ENABLED(PARTITION_UUIDS)
321 uuid_bin_to_str(gpt_pte
[part
- 1].unique_partition_guid
.b
, info
->uuid
,
322 UUID_STR_FORMAT_GUID
);
324 #ifdef CONFIG_PARTITION_TYPE_GUID
325 uuid_bin_to_str(gpt_pte
[part
- 1].partition_type_guid
.b
,
326 info
->type_guid
, UUID_STR_FORMAT_GUID
);
329 debug("%s: start 0x" LBAF
", size 0x" LBAF
", name %s\n", __func__
,
330 info
->start
, info
->size
, info
->name
);
332 /* Remember to free pte */
337 static int part_test_efi(struct blk_desc
*dev_desc
)
339 ALLOC_CACHE_ALIGN_BUFFER_PAD(legacy_mbr
, legacymbr
, 1, dev_desc
->blksz
);
341 /* Read legacy MBR from block 0 and validate it */
342 if ((blk_dread(dev_desc
, 0, 1, (ulong
*)legacymbr
) != 1)
343 || (is_pmbr_valid(legacymbr
) != 1)) {
350 * set_protective_mbr(): Set the EFI protective MBR
351 * @param dev_desc - block device descriptor
353 * @return - zero on success, otherwise error
355 static int set_protective_mbr(struct blk_desc
*dev_desc
)
357 /* Setup the Protective MBR */
358 ALLOC_CACHE_ALIGN_BUFFER_PAD(legacy_mbr
, p_mbr
, 1, dev_desc
->blksz
);
360 printf("%s: calloc failed!\n", __func__
);
364 /* Read MBR to backup boot code if it exists */
365 if (blk_dread(dev_desc
, 0, 1, p_mbr
) != 1) {
366 pr_err("** Can't read from device %d **\n", dev_desc
->devnum
);
370 /* Clear all data in MBR except of backed up boot code */
371 memset((char *)p_mbr
+ MSDOS_MBR_BOOT_CODE_SIZE
, 0, sizeof(*p_mbr
) -
372 MSDOS_MBR_BOOT_CODE_SIZE
);
374 /* Append signature */
375 p_mbr
->signature
= MSDOS_MBR_SIGNATURE
;
376 p_mbr
->partition_record
[0].sys_ind
= EFI_PMBR_OSTYPE_EFI_GPT
;
377 p_mbr
->partition_record
[0].start_sect
= 1;
378 p_mbr
->partition_record
[0].nr_sects
= (u32
) dev_desc
->lba
- 1;
380 /* Write MBR sector to the MMC device */
381 if (blk_dwrite(dev_desc
, 0, 1, p_mbr
) != 1) {
382 printf("** Can't write to device %d **\n",
390 int write_gpt_table(struct blk_desc
*dev_desc
,
391 gpt_header
*gpt_h
, gpt_entry
*gpt_e
)
393 const int pte_blk_cnt
= BLOCK_CNT((gpt_h
->num_partition_entries
394 * sizeof(gpt_entry
)), dev_desc
);
397 debug("max lba: %x\n", (u32
) dev_desc
->lba
);
398 /* Setup the Protective MBR */
399 if (set_protective_mbr(dev_desc
) < 0)
402 /* Generate CRC for the Primary GPT Header */
403 calc_crc32
= efi_crc32((const unsigned char *)gpt_e
,
404 le32_to_cpu(gpt_h
->num_partition_entries
) *
405 le32_to_cpu(gpt_h
->sizeof_partition_entry
));
406 gpt_h
->partition_entry_array_crc32
= cpu_to_le32(calc_crc32
);
408 calc_crc32
= efi_crc32((const unsigned char *)gpt_h
,
409 le32_to_cpu(gpt_h
->header_size
));
410 gpt_h
->header_crc32
= cpu_to_le32(calc_crc32
);
412 /* Write the First GPT to the block right after the Legacy MBR */
413 if (blk_dwrite(dev_desc
, 1, 1, gpt_h
) != 1)
416 if (blk_dwrite(dev_desc
, le64_to_cpu(gpt_h
->partition_entry_lba
),
417 pte_blk_cnt
, gpt_e
) != pte_blk_cnt
)
420 prepare_backup_gpt_header(gpt_h
);
422 if (blk_dwrite(dev_desc
, (lbaint_t
)le64_to_cpu(gpt_h
->last_usable_lba
)
423 + 1, pte_blk_cnt
, gpt_e
) != pte_blk_cnt
)
426 if (blk_dwrite(dev_desc
, (lbaint_t
)le64_to_cpu(gpt_h
->my_lba
), 1,
430 debug("GPT successfully written to block device!\n");
434 printf("** Can't write to device %d **\n", dev_desc
->devnum
);
438 int gpt_fill_pte(struct blk_desc
*dev_desc
,
439 gpt_header
*gpt_h
, gpt_entry
*gpt_e
,
440 disk_partition_t
*partitions
, int parts
)
442 lbaint_t offset
= (lbaint_t
)le64_to_cpu(gpt_h
->first_usable_lba
);
443 lbaint_t last_usable_lba
= (lbaint_t
)
444 le64_to_cpu(gpt_h
->last_usable_lba
);
446 size_t efiname_len
, dosname_len
;
447 #if CONFIG_IS_ENABLED(PARTITION_UUIDS)
449 unsigned char *bin_uuid
;
451 #ifdef CONFIG_PARTITION_TYPE_GUID
453 unsigned char *bin_type_guid
;
455 size_t hdr_start
= gpt_h
->my_lba
;
456 size_t hdr_end
= hdr_start
+ 1;
458 size_t pte_start
= gpt_h
->partition_entry_lba
;
459 size_t pte_end
= pte_start
+
460 gpt_h
->num_partition_entries
* gpt_h
->sizeof_partition_entry
/
463 for (i
= 0; i
< parts
; i
++) {
464 /* partition starting lba */
465 lbaint_t start
= partitions
[i
].start
;
466 lbaint_t size
= partitions
[i
].size
;
469 offset
= start
+ size
;
476 * If our partition overlaps with either the GPT
477 * header, or the partition entry, reject it.
479 if (((start
< hdr_end
&& hdr_start
< (start
+ size
)) ||
480 (start
< pte_end
&& pte_start
< (start
+ size
)))) {
481 printf("Partition overlap\n");
485 gpt_e
[i
].starting_lba
= cpu_to_le64(start
);
487 if (offset
> (last_usable_lba
+ 1)) {
488 printf("Partitions layout exceds disk size\n");
491 /* partition ending lba */
492 if ((i
== parts
- 1) && (size
== 0))
493 /* extend the last partition to maximuim */
494 gpt_e
[i
].ending_lba
= gpt_h
->last_usable_lba
;
496 gpt_e
[i
].ending_lba
= cpu_to_le64(offset
- 1);
498 #ifdef CONFIG_PARTITION_TYPE_GUID
499 str_type_guid
= partitions
[i
].type_guid
;
500 bin_type_guid
= gpt_e
[i
].partition_type_guid
.b
;
501 if (strlen(str_type_guid
)) {
502 if (uuid_str_to_bin(str_type_guid
, bin_type_guid
,
503 UUID_STR_FORMAT_GUID
)) {
504 printf("Partition no. %d: invalid type guid: %s\n",
509 /* default partition type GUID */
510 memcpy(bin_type_guid
,
511 &partition_basic_data_guid
, 16);
514 /* partition type GUID */
515 memcpy(gpt_e
[i
].partition_type_guid
.b
,
516 &partition_basic_data_guid
, 16);
519 #if CONFIG_IS_ENABLED(PARTITION_UUIDS)
520 str_uuid
= partitions
[i
].uuid
;
521 bin_uuid
= gpt_e
[i
].unique_partition_guid
.b
;
523 if (uuid_str_to_bin(str_uuid
, bin_uuid
, UUID_STR_FORMAT_GUID
)) {
524 printf("Partition no. %d: invalid guid: %s\n",
530 /* partition attributes */
531 memset(&gpt_e
[i
].attributes
, 0,
532 sizeof(gpt_entry_attributes
));
534 if (partitions
[i
].bootable
)
535 gpt_e
[i
].attributes
.fields
.legacy_bios_bootable
= 1;
538 efiname_len
= sizeof(gpt_e
[i
].partition_name
)
539 / sizeof(efi_char16_t
);
540 dosname_len
= sizeof(partitions
[i
].name
);
542 memset(gpt_e
[i
].partition_name
, 0,
543 sizeof(gpt_e
[i
].partition_name
));
545 for (k
= 0; k
< min(dosname_len
, efiname_len
); k
++)
546 gpt_e
[i
].partition_name
[k
] =
547 (efi_char16_t
)(partitions
[i
].name
[k
]);
549 debug("%s: name: %s offset[%d]: 0x" LBAF
550 " size[%d]: 0x" LBAF
"\n",
551 __func__
, partitions
[i
].name
, i
,
558 static uint32_t partition_entries_offset(struct blk_desc
*dev_desc
)
560 uint32_t offset_blks
= 2;
561 uint32_t __maybe_unused offset_bytes
;
562 int __maybe_unused config_offset
;
564 #if defined(CONFIG_EFI_PARTITION_ENTRIES_OFF)
566 * Some architectures require their SPL loader at a fixed
567 * address within the first 16KB of the disk. To avoid an
568 * overlap with the partition entries of the EFI partition
569 * table, the first safe offset (in bytes, from the start of
570 * the disk) for the entries can be set in
571 * CONFIG_EFI_PARTITION_ENTRIES_OFF.
574 PAD_TO_BLOCKSIZE(CONFIG_EFI_PARTITION_ENTRIES_OFF
, dev_desc
);
575 offset_blks
= offset_bytes
/ dev_desc
->blksz
;
578 #if defined(CONFIG_OF_CONTROL)
580 * Allow the offset of the first partition entires (in bytes
581 * from the start of the device) to be specified as a property
582 * of the device tree '/config' node.
584 config_offset
= fdtdec_get_config_int(gd
->fdt_blob
,
585 "u-boot,efi-partition-entries-offset",
587 if (config_offset
!= -EINVAL
) {
588 offset_bytes
= PAD_TO_BLOCKSIZE(config_offset
, dev_desc
);
589 offset_blks
= offset_bytes
/ dev_desc
->blksz
;
593 debug("efi: partition entries offset (in blocks): %d\n", offset_blks
);
596 * The earliest LBA this can be at is LBA#2 (i.e. right behind
597 * the (protective) MBR and the GPT header.
605 int gpt_fill_header(struct blk_desc
*dev_desc
, gpt_header
*gpt_h
,
606 char *str_guid
, int parts_count
)
608 gpt_h
->signature
= cpu_to_le64(GPT_HEADER_SIGNATURE_UBOOT
);
609 gpt_h
->revision
= cpu_to_le32(GPT_HEADER_REVISION_V1
);
610 gpt_h
->header_size
= cpu_to_le32(sizeof(gpt_header
));
611 gpt_h
->my_lba
= cpu_to_le64(1);
612 gpt_h
->alternate_lba
= cpu_to_le64(dev_desc
->lba
- 1);
613 gpt_h
->last_usable_lba
= cpu_to_le64(dev_desc
->lba
- 34);
614 gpt_h
->partition_entry_lba
=
615 cpu_to_le64(partition_entries_offset(dev_desc
));
616 gpt_h
->first_usable_lba
=
617 cpu_to_le64(le64_to_cpu(gpt_h
->partition_entry_lba
) + 32);
618 gpt_h
->num_partition_entries
= cpu_to_le32(GPT_ENTRY_NUMBERS
);
619 gpt_h
->sizeof_partition_entry
= cpu_to_le32(sizeof(gpt_entry
));
620 gpt_h
->header_crc32
= 0;
621 gpt_h
->partition_entry_array_crc32
= 0;
623 if (uuid_str_to_bin(str_guid
, gpt_h
->disk_guid
.b
, UUID_STR_FORMAT_GUID
))
629 int gpt_restore(struct blk_desc
*dev_desc
, char *str_disk_guid
,
630 disk_partition_t
*partitions
, int parts_count
)
636 size
= PAD_TO_BLOCKSIZE(sizeof(gpt_header
), dev_desc
);
637 gpt_h
= malloc_cache_aligned(size
);
639 printf("%s: calloc failed!\n", __func__
);
642 memset(gpt_h
, 0, size
);
644 size
= PAD_TO_BLOCKSIZE(GPT_ENTRY_NUMBERS
* sizeof(gpt_entry
),
646 gpt_e
= malloc_cache_aligned(size
);
648 printf("%s: calloc failed!\n", __func__
);
652 memset(gpt_e
, 0, size
);
654 /* Generate Primary GPT header (LBA1) */
655 ret
= gpt_fill_header(dev_desc
, gpt_h
, str_disk_guid
, parts_count
);
659 /* Generate partition entries */
660 ret
= gpt_fill_pte(dev_desc
, gpt_h
, gpt_e
, partitions
, parts_count
);
664 /* Write GPT partition table */
665 ret
= write_gpt_table(dev_desc
, gpt_h
, gpt_e
);
673 static void gpt_convert_efi_name_to_char(char *s
, efi_char16_t
*es
, int n
)
675 char *ess
= (char *)es
;
680 for (i
= 0, j
= 0; j
< n
; i
+= 2, j
++) {
687 int gpt_verify_headers(struct blk_desc
*dev_desc
, gpt_header
*gpt_head
,
691 * This function validates AND
692 * fills in the GPT header and PTE
694 if (is_gpt_valid(dev_desc
,
695 GPT_PRIMARY_PARTITION_TABLE_LBA
,
696 gpt_head
, gpt_pte
) != 1) {
697 printf("%s: *** ERROR: Invalid GPT ***\n",
702 /* Free pte before allocating again */
705 if (is_gpt_valid(dev_desc
, (dev_desc
->lba
- 1),
706 gpt_head
, gpt_pte
) != 1) {
707 printf("%s: *** ERROR: Invalid Backup GPT ***\n",
715 int gpt_verify_partitions(struct blk_desc
*dev_desc
,
716 disk_partition_t
*partitions
, int parts
,
717 gpt_header
*gpt_head
, gpt_entry
**gpt_pte
)
719 char efi_str
[PARTNAME_SZ
+ 1];
724 ret
= gpt_verify_headers(dev_desc
, gpt_head
, gpt_pte
);
730 for (i
= 0; i
< parts
; i
++) {
731 if (i
== gpt_head
->num_partition_entries
) {
732 pr_err("More partitions than allowed!\n");
736 /* Check if GPT and ENV partition names match */
737 gpt_convert_efi_name_to_char(efi_str
, gpt_e
[i
].partition_name
,
740 debug("%s: part: %2d name - GPT: %16s, ENV: %16s ",
741 __func__
, i
, efi_str
, partitions
[i
].name
);
743 if (strncmp(efi_str
, (char *)partitions
[i
].name
,
744 sizeof(partitions
->name
))) {
745 pr_err("Partition name: %s does not match %s!\n",
746 efi_str
, (char *)partitions
[i
].name
);
750 /* Check if GPT and ENV sizes match */
751 gpt_part_size
= le64_to_cpu(gpt_e
[i
].ending_lba
) -
752 le64_to_cpu(gpt_e
[i
].starting_lba
) + 1;
753 debug("size(LBA) - GPT: %8llu, ENV: %8llu ",
754 (unsigned long long)gpt_part_size
,
755 (unsigned long long)partitions
[i
].size
);
757 if (le64_to_cpu(gpt_part_size
) != partitions
[i
].size
) {
758 /* We do not check the extend partition size */
759 if ((i
== parts
- 1) && (partitions
[i
].size
== 0))
762 pr_err("Partition %s size: %llu does not match %llu!\n",
763 efi_str
, (unsigned long long)gpt_part_size
,
764 (unsigned long long)partitions
[i
].size
);
769 * Start address is optional - check only if provided
770 * in '$partition' variable
772 if (!partitions
[i
].start
) {
777 /* Check if GPT and ENV start LBAs match */
778 debug("start LBA - GPT: %8llu, ENV: %8llu\n",
779 le64_to_cpu(gpt_e
[i
].starting_lba
),
780 (unsigned long long)partitions
[i
].start
);
782 if (le64_to_cpu(gpt_e
[i
].starting_lba
) != partitions
[i
].start
) {
783 pr_err("Partition %s start: %llu does not match %llu!\n",
784 efi_str
, le64_to_cpu(gpt_e
[i
].starting_lba
),
785 (unsigned long long)partitions
[i
].start
);
793 int is_valid_gpt_buf(struct blk_desc
*dev_desc
, void *buf
)
798 /* determine start of GPT Header in the buffer */
799 gpt_h
= buf
+ (GPT_PRIMARY_PARTITION_TABLE_LBA
*
801 if (validate_gpt_header(gpt_h
, GPT_PRIMARY_PARTITION_TABLE_LBA
,
805 /* determine start of GPT Entries in the buffer */
806 gpt_e
= buf
+ (le64_to_cpu(gpt_h
->partition_entry_lba
) *
808 if (validate_gpt_entries(gpt_h
, gpt_e
))
814 int write_mbr_and_gpt_partitions(struct blk_desc
*dev_desc
, void *buf
)
822 if (is_valid_gpt_buf(dev_desc
, buf
))
825 /* determine start of GPT Header in the buffer */
826 gpt_h
= buf
+ (GPT_PRIMARY_PARTITION_TABLE_LBA
*
829 /* determine start of GPT Entries in the buffer */
830 gpt_e
= buf
+ (le64_to_cpu(gpt_h
->partition_entry_lba
) *
832 gpt_e_blk_cnt
= BLOCK_CNT((le32_to_cpu(gpt_h
->num_partition_entries
) *
833 le32_to_cpu(gpt_h
->sizeof_partition_entry
)),
837 lba
= 0; /* MBR is always at 0 */
838 cnt
= 1; /* MBR (1 block) */
839 if (blk_dwrite(dev_desc
, lba
, cnt
, buf
) != cnt
) {
840 printf("%s: failed writing '%s' (%d blks at 0x" LBAF
")\n",
841 __func__
, "MBR", cnt
, lba
);
845 /* write Primary GPT */
846 lba
= GPT_PRIMARY_PARTITION_TABLE_LBA
;
847 cnt
= 1; /* GPT Header (1 block) */
848 if (blk_dwrite(dev_desc
, lba
, cnt
, gpt_h
) != cnt
) {
849 printf("%s: failed writing '%s' (%d blks at 0x" LBAF
")\n",
850 __func__
, "Primary GPT Header", cnt
, lba
);
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__
, "Primary GPT Entries", cnt
, lba
);
862 prepare_backup_gpt_header(gpt_h
);
864 /* write Backup GPT */
865 lba
= le64_to_cpu(gpt_h
->partition_entry_lba
);
867 if (blk_dwrite(dev_desc
, lba
, cnt
, gpt_e
) != cnt
) {
868 printf("%s: failed writing '%s' (%d blks at 0x" LBAF
")\n",
869 __func__
, "Backup GPT Entries", cnt
, lba
);
873 lba
= le64_to_cpu(gpt_h
->my_lba
);
874 cnt
= 1; /* GPT Header (1 block) */
875 if (blk_dwrite(dev_desc
, lba
, cnt
, gpt_h
) != cnt
) {
876 printf("%s: failed writing '%s' (%d blks at 0x" LBAF
")\n",
877 __func__
, "Backup GPT Header", cnt
, lba
);
889 * pmbr_part_valid(): Check for EFI partition signature
891 * Returns: 1 if EFI GPT partition type is found.
893 static int pmbr_part_valid(struct partition
*part
)
895 if (part
->sys_ind
== EFI_PMBR_OSTYPE_EFI_GPT
&&
896 get_unaligned_le32(&part
->start_sect
) == 1UL) {
904 * is_pmbr_valid(): test Protective MBR for validity
906 * Returns: 1 if PMBR is valid, 0 otherwise.
907 * Validity depends on two things:
908 * 1) MSDOS signature is in the last two bytes of the MBR
909 * 2) One partition of type 0xEE is found, checked by pmbr_part_valid()
911 static int is_pmbr_valid(legacy_mbr
* mbr
)
915 if (!mbr
|| le16_to_cpu(mbr
->signature
) != MSDOS_MBR_SIGNATURE
)
918 for (i
= 0; i
< 4; i
++) {
919 if (pmbr_part_valid(&mbr
->partition_record
[i
])) {
927 * is_gpt_valid() - tests one GPT header and PTEs for validity
929 * lba is the logical block address of the GPT header to test
930 * gpt is a GPT header ptr, filled on return.
931 * ptes is a PTEs ptr, filled on return.
933 * Description: returns 1 if valid, 0 on error.
934 * If valid, returns pointers to PTEs.
936 static int is_gpt_valid(struct blk_desc
*dev_desc
, u64 lba
,
937 gpt_header
*pgpt_head
, gpt_entry
**pgpt_pte
)
939 /* Confirm valid arguments prior to allocation. */
940 if (!dev_desc
|| !pgpt_head
) {
941 printf("%s: Invalid Argument(s)\n", __func__
);
945 ALLOC_CACHE_ALIGN_BUFFER_PAD(legacy_mbr
, mbr
, 1, dev_desc
->blksz
);
947 /* Read MBR Header from device */
948 if (blk_dread(dev_desc
, 0, 1, (ulong
*)mbr
) != 1) {
949 printf("*** ERROR: Can't read MBR header ***\n");
953 /* Read GPT Header from device */
954 if (blk_dread(dev_desc
, (lbaint_t
)lba
, 1, pgpt_head
) != 1) {
955 printf("*** ERROR: Can't read GPT header ***\n");
959 if (validate_gpt_header(pgpt_head
, (lbaint_t
)lba
, dev_desc
->lba
))
962 if (dev_desc
->sig_type
== SIG_TYPE_NONE
) {
963 efi_guid_t empty
= {};
964 if (memcmp(&pgpt_head
->disk_guid
, &empty
, sizeof(empty
))) {
965 dev_desc
->sig_type
= SIG_TYPE_GUID
;
966 memcpy(&dev_desc
->guid_sig
, &pgpt_head
->disk_guid
,
968 } else if (mbr
->unique_mbr_signature
!= 0) {
969 dev_desc
->sig_type
= SIG_TYPE_MBR
;
970 dev_desc
->mbr_sig
= mbr
->unique_mbr_signature
;
974 /* Read and allocate Partition Table Entries */
975 *pgpt_pte
= alloc_read_gpt_entries(dev_desc
, pgpt_head
);
976 if (*pgpt_pte
== NULL
) {
977 printf("GPT: Failed to allocate memory for PTE\n");
981 if (validate_gpt_entries(pgpt_head
, *pgpt_pte
)) {
986 /* We're done, all's well */
991 * alloc_read_gpt_entries(): reads partition entries from disk
995 * Description: Returns ptes on success, NULL on error.
996 * Allocates space for PTEs based on information found in @gpt.
997 * Notes: remember to free pte when you're done!
999 static gpt_entry
*alloc_read_gpt_entries(struct blk_desc
*dev_desc
,
1000 gpt_header
*pgpt_head
)
1002 size_t count
= 0, blk_cnt
;
1004 gpt_entry
*pte
= NULL
;
1006 if (!dev_desc
|| !pgpt_head
) {
1007 printf("%s: Invalid Argument(s)\n", __func__
);
1011 count
= le32_to_cpu(pgpt_head
->num_partition_entries
) *
1012 le32_to_cpu(pgpt_head
->sizeof_partition_entry
);
1014 debug("%s: count = %u * %u = %lu\n", __func__
,
1015 (u32
) le32_to_cpu(pgpt_head
->num_partition_entries
),
1016 (u32
) le32_to_cpu(pgpt_head
->sizeof_partition_entry
),
1019 /* Allocate memory for PTE, remember to FREE */
1021 pte
= memalign(ARCH_DMA_MINALIGN
,
1022 PAD_TO_BLOCKSIZE(count
, dev_desc
));
1025 if (count
== 0 || pte
== NULL
) {
1026 printf("%s: ERROR: Can't allocate %#lX bytes for GPT Entries\n",
1027 __func__
, (ulong
)count
);
1031 /* Read GPT Entries from device */
1032 blk
= le64_to_cpu(pgpt_head
->partition_entry_lba
);
1033 blk_cnt
= BLOCK_CNT(count
, dev_desc
);
1034 if (blk_dread(dev_desc
, blk
, (lbaint_t
)blk_cnt
, pte
) != blk_cnt
) {
1035 printf("*** ERROR: Can't read GPT Entries ***\n");
1043 * is_pte_valid(): validates a single Partition Table Entry
1044 * @gpt_entry - Pointer to a single Partition Table Entry
1046 * Description: returns 1 if valid, 0 on error.
1048 static int is_pte_valid(gpt_entry
* pte
)
1050 efi_guid_t unused_guid
;
1053 printf("%s: Invalid Argument(s)\n", __func__
);
1057 /* Only one validation for now:
1058 * The GUID Partition Type != Unused Entry (ALL-ZERO)
1060 memset(unused_guid
.b
, 0, sizeof(unused_guid
.b
));
1062 if (memcmp(pte
->partition_type_guid
.b
, unused_guid
.b
,
1063 sizeof(unused_guid
.b
)) == 0) {
1065 debug("%s: Found an unused PTE GUID at 0x%08X\n", __func__
,
1066 (unsigned int)(uintptr_t)pte
);
1075 * Add an 'a_' prefix so it comes before 'dos' in the linker list. We need to
1076 * check EFI first, since a DOS partition is often used as a 'protective MBR'
1079 U_BOOT_PART_TYPE(a_efi
) = {
1081 .part_type
= PART_TYPE_EFI
,
1082 .max_entries
= GPT_ENTRY_NUMBERS
,
1083 .get_info
= part_get_info_ptr(part_get_info_efi
),
1084 .print
= part_print_ptr(part_print_efi
),
1085 .test
= part_test_efi
,