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 #ifdef CONFIG_HAVE_BLOCK_DEVICE
33 /* GUID for basic data partitons */
34 #if CONFIG_IS_ENABLED(EFI_PARTITION)
35 static const efi_guid_t partition_basic_data_guid
= PARTITION_BASIC_DATA_GUID
;
39 * efi_crc32() - EFI version of crc32 function
40 * @buf: buffer to calculate crc32 of
41 * @len - length of buf
43 * Description: Returns EFI-style CRC32 value for @buf
45 static inline u32
efi_crc32(const void *buf
, u32 len
)
47 return crc32(0, buf
, len
);
51 * Private function prototypes
54 static int pmbr_part_valid(struct partition
*part
);
55 static int is_pmbr_valid(legacy_mbr
* mbr
);
56 static int is_gpt_valid(struct blk_desc
*dev_desc
, u64 lba
,
57 gpt_header
*pgpt_head
, gpt_entry
**pgpt_pte
);
58 static gpt_entry
*alloc_read_gpt_entries(struct blk_desc
*dev_desc
,
59 gpt_header
*pgpt_head
);
60 static int is_pte_valid(gpt_entry
* pte
);
61 static int find_valid_gpt(struct blk_desc
*dev_desc
, gpt_header
*gpt_head
,
62 gpt_entry
**pgpt_pte
);
64 static char *print_efiname(gpt_entry
*pte
)
66 static char name
[PARTNAME_SZ
+ 1];
68 for (i
= 0; i
< PARTNAME_SZ
; i
++) {
70 c
= pte
->partition_name
[i
] & 0xff;
71 c
= (c
&& !isprint(c
)) ? '.' : c
;
74 name
[PARTNAME_SZ
] = 0;
78 static const efi_guid_t system_guid
= PARTITION_SYSTEM_GUID
;
80 static int get_bootable(gpt_entry
*p
)
84 if (!memcmp(&p
->partition_type_guid
, &system_guid
, sizeof(efi_guid_t
)))
85 ret
|= PART_EFI_SYSTEM_PARTITION
;
86 if (p
->attributes
.fields
.legacy_bios_bootable
)
91 static int validate_gpt_header(gpt_header
*gpt_h
, lbaint_t lba
,
94 uint32_t crc32_backup
= 0;
97 /* Check the GPT header signature */
98 if (le64_to_cpu(gpt_h
->signature
) != GPT_HEADER_SIGNATURE_UBOOT
) {
99 printf("%s signature is wrong: 0x%llX != 0x%llX\n",
100 "GUID Partition Table Header",
101 le64_to_cpu(gpt_h
->signature
),
102 GPT_HEADER_SIGNATURE_UBOOT
);
106 /* Check the GUID Partition Table CRC */
107 memcpy(&crc32_backup
, &gpt_h
->header_crc32
, sizeof(crc32_backup
));
108 memset(&gpt_h
->header_crc32
, 0, sizeof(gpt_h
->header_crc32
));
110 calc_crc32
= efi_crc32((const unsigned char *)gpt_h
,
111 le32_to_cpu(gpt_h
->header_size
));
113 memcpy(&gpt_h
->header_crc32
, &crc32_backup
, sizeof(crc32_backup
));
115 if (calc_crc32
!= le32_to_cpu(crc32_backup
)) {
116 printf("%s CRC is wrong: 0x%x != 0x%x\n",
117 "GUID Partition Table Header",
118 le32_to_cpu(crc32_backup
), calc_crc32
);
123 * Check that the my_lba entry points to the LBA that contains the GPT
125 if (le64_to_cpu(gpt_h
->my_lba
) != lba
) {
126 printf("GPT: my_lba incorrect: %llX != " LBAF
"\n",
127 le64_to_cpu(gpt_h
->my_lba
),
133 * Check that the first_usable_lba and that the last_usable_lba are
136 if (le64_to_cpu(gpt_h
->first_usable_lba
) > lastlba
) {
137 printf("GPT: first_usable_lba incorrect: %llX > " LBAF
"\n",
138 le64_to_cpu(gpt_h
->first_usable_lba
), lastlba
);
141 if (le64_to_cpu(gpt_h
->last_usable_lba
) > lastlba
) {
142 printf("GPT: last_usable_lba incorrect: %llX > " LBAF
"\n",
143 le64_to_cpu(gpt_h
->last_usable_lba
), lastlba
);
147 debug("GPT: first_usable_lba: %llX last_usable_lba: %llX last lba: "
148 LBAF
"\n", le64_to_cpu(gpt_h
->first_usable_lba
),
149 le64_to_cpu(gpt_h
->last_usable_lba
), lastlba
);
154 static int validate_gpt_entries(gpt_header
*gpt_h
, gpt_entry
*gpt_e
)
158 /* Check the GUID Partition Table Entry Array CRC */
159 calc_crc32
= efi_crc32((const unsigned char *)gpt_e
,
160 le32_to_cpu(gpt_h
->num_partition_entries
) *
161 le32_to_cpu(gpt_h
->sizeof_partition_entry
));
163 if (calc_crc32
!= le32_to_cpu(gpt_h
->partition_entry_array_crc32
)) {
164 printf("%s: 0x%x != 0x%x\n",
165 "GUID Partition Table Entry Array CRC is wrong",
166 le32_to_cpu(gpt_h
->partition_entry_array_crc32
),
174 static void prepare_backup_gpt_header(gpt_header
*gpt_h
)
179 /* recalculate the values for the Backup GPT Header */
180 val
= le64_to_cpu(gpt_h
->my_lba
);
181 gpt_h
->my_lba
= gpt_h
->alternate_lba
;
182 gpt_h
->alternate_lba
= cpu_to_le64(val
);
183 gpt_h
->partition_entry_lba
=
184 cpu_to_le64(le64_to_cpu(gpt_h
->last_usable_lba
) + 1);
185 gpt_h
->header_crc32
= 0;
187 calc_crc32
= efi_crc32((const unsigned char *)gpt_h
,
188 le32_to_cpu(gpt_h
->header_size
));
189 gpt_h
->header_crc32
= cpu_to_le32(calc_crc32
);
192 #if CONFIG_IS_ENABLED(EFI_PARTITION)
194 * Public Functions (include/part.h)
198 * UUID is displayed as 32 hexadecimal digits, in 5 groups,
199 * separated by hyphens, in the form 8-4-4-4-12 for a total of 36 characters
201 int get_disk_guid(struct blk_desc
* dev_desc
, char *guid
)
203 ALLOC_CACHE_ALIGN_BUFFER_PAD(gpt_header
, gpt_head
, 1, dev_desc
->blksz
);
204 gpt_entry
*gpt_pte
= NULL
;
205 unsigned char *guid_bin
;
207 /* This function validates AND fills in the GPT header and PTE */
208 if (find_valid_gpt(dev_desc
, gpt_head
, &gpt_pte
) != 1)
211 guid_bin
= gpt_head
->disk_guid
.b
;
212 uuid_bin_to_str(guid_bin
, guid
, UUID_STR_FORMAT_GUID
);
214 /* Remember to free pte */
219 void part_print_efi(struct blk_desc
*dev_desc
)
221 ALLOC_CACHE_ALIGN_BUFFER_PAD(gpt_header
, gpt_head
, 1, dev_desc
->blksz
);
222 gpt_entry
*gpt_pte
= NULL
;
224 char uuid
[UUID_STR_LEN
+ 1];
225 unsigned char *uuid_bin
;
227 /* This function validates AND fills in the GPT header and PTE */
228 if (find_valid_gpt(dev_desc
, gpt_head
, &gpt_pte
) != 1)
231 debug("%s: gpt-entry at %p\n", __func__
, gpt_pte
);
233 printf("Part\tStart LBA\tEnd LBA\t\tName\n");
234 printf("\tAttributes\n");
235 printf("\tType GUID\n");
236 printf("\tPartition GUID\n");
238 for (i
= 0; i
< le32_to_cpu(gpt_head
->num_partition_entries
); i
++) {
239 /* Skip invalid PTE */
240 if (!is_pte_valid(&gpt_pte
[i
]))
243 printf("%3d\t0x%08llx\t0x%08llx\t\"%s\"\n", (i
+ 1),
244 le64_to_cpu(gpt_pte
[i
].starting_lba
),
245 le64_to_cpu(gpt_pte
[i
].ending_lba
),
246 print_efiname(&gpt_pte
[i
]));
247 printf("\tattrs:\t0x%016llx\n", gpt_pte
[i
].attributes
.raw
);
248 uuid_bin
= (unsigned char *)gpt_pte
[i
].partition_type_guid
.b
;
249 uuid_bin_to_str(uuid_bin
, uuid
, UUID_STR_FORMAT_GUID
);
250 printf("\ttype:\t%s\n", uuid
);
251 if (CONFIG_IS_ENABLED(PARTITION_TYPE_GUID
)) {
252 const char *type
= uuid_guid_get_str(uuid_bin
);
254 printf("\ttype:\t%s\n", type
);
256 uuid_bin
= (unsigned char *)gpt_pte
[i
].unique_partition_guid
.b
;
257 uuid_bin_to_str(uuid_bin
, uuid
, UUID_STR_FORMAT_GUID
);
258 printf("\tguid:\t%s\n", uuid
);
261 /* Remember to free pte */
266 int part_get_info_efi(struct blk_desc
*dev_desc
, int part
,
267 struct disk_partition
*info
)
269 ALLOC_CACHE_ALIGN_BUFFER_PAD(gpt_header
, gpt_head
, 1, dev_desc
->blksz
);
270 gpt_entry
*gpt_pte
= NULL
;
272 /* "part" argument must be at least 1 */
274 printf("%s: Invalid Argument(s)\n", __func__
);
278 /* This function validates AND fills in the GPT header and PTE */
279 if (find_valid_gpt(dev_desc
, gpt_head
, &gpt_pte
) != 1)
282 if (part
> le32_to_cpu(gpt_head
->num_partition_entries
) ||
283 !is_pte_valid(&gpt_pte
[part
- 1])) {
284 debug("%s: *** ERROR: Invalid partition number %d ***\n",
290 /* The 'lbaint_t' casting may limit the maximum disk size to 2 TB */
291 info
->start
= (lbaint_t
)le64_to_cpu(gpt_pte
[part
- 1].starting_lba
);
292 /* The ending LBA is inclusive, to calculate size, add 1 to it */
293 info
->size
= (lbaint_t
)le64_to_cpu(gpt_pte
[part
- 1].ending_lba
) + 1
295 info
->blksz
= dev_desc
->blksz
;
297 snprintf((char *)info
->name
, sizeof(info
->name
), "%s",
298 print_efiname(&gpt_pte
[part
- 1]));
299 strcpy((char *)info
->type
, "U-Boot");
300 info
->bootable
= get_bootable(&gpt_pte
[part
- 1]);
301 #if CONFIG_IS_ENABLED(PARTITION_UUIDS)
302 uuid_bin_to_str(gpt_pte
[part
- 1].unique_partition_guid
.b
, info
->uuid
,
303 UUID_STR_FORMAT_GUID
);
305 #ifdef CONFIG_PARTITION_TYPE_GUID
306 uuid_bin_to_str(gpt_pte
[part
- 1].partition_type_guid
.b
,
307 info
->type_guid
, UUID_STR_FORMAT_GUID
);
310 debug("%s: start 0x" LBAF
", size 0x" LBAF
", name %s\n", __func__
,
311 info
->start
, info
->size
, info
->name
);
313 /* Remember to free pte */
318 static int part_test_efi(struct blk_desc
*dev_desc
)
320 ALLOC_CACHE_ALIGN_BUFFER_PAD(legacy_mbr
, legacymbr
, 1, dev_desc
->blksz
);
322 /* Read legacy MBR from block 0 and validate it */
323 if ((blk_dread(dev_desc
, 0, 1, (ulong
*)legacymbr
) != 1)
324 || (is_pmbr_valid(legacymbr
) != 1)) {
331 * set_protective_mbr(): Set the EFI protective MBR
332 * @param dev_desc - block device descriptor
334 * @return - zero on success, otherwise error
336 static int set_protective_mbr(struct blk_desc
*dev_desc
)
338 /* Setup the Protective MBR */
339 ALLOC_CACHE_ALIGN_BUFFER_PAD(legacy_mbr
, p_mbr
, 1, dev_desc
->blksz
);
341 printf("%s: calloc failed!\n", __func__
);
345 /* Read MBR to backup boot code if it exists */
346 if (blk_dread(dev_desc
, 0, 1, p_mbr
) != 1) {
347 pr_err("** Can't read from device %d **\n", dev_desc
->devnum
);
351 /* Clear all data in MBR except of backed up boot code */
352 memset((char *)p_mbr
+ MSDOS_MBR_BOOT_CODE_SIZE
, 0, sizeof(*p_mbr
) -
353 MSDOS_MBR_BOOT_CODE_SIZE
);
355 /* Append signature */
356 p_mbr
->signature
= MSDOS_MBR_SIGNATURE
;
357 p_mbr
->partition_record
[0].sys_ind
= EFI_PMBR_OSTYPE_EFI_GPT
;
358 p_mbr
->partition_record
[0].start_sect
= 1;
359 p_mbr
->partition_record
[0].nr_sects
= (u32
) dev_desc
->lba
- 1;
361 /* Write MBR sector to the MMC device */
362 if (blk_dwrite(dev_desc
, 0, 1, p_mbr
) != 1) {
363 printf("** Can't write to device %d **\n",
371 int write_gpt_table(struct blk_desc
*dev_desc
,
372 gpt_header
*gpt_h
, gpt_entry
*gpt_e
)
374 const int pte_blk_cnt
= BLOCK_CNT((gpt_h
->num_partition_entries
375 * sizeof(gpt_entry
)), dev_desc
);
378 debug("max lba: %x\n", (u32
) dev_desc
->lba
);
379 /* Setup the Protective MBR */
380 if (set_protective_mbr(dev_desc
) < 0)
383 /* Generate CRC for the Primary GPT Header */
384 calc_crc32
= efi_crc32((const unsigned char *)gpt_e
,
385 le32_to_cpu(gpt_h
->num_partition_entries
) *
386 le32_to_cpu(gpt_h
->sizeof_partition_entry
));
387 gpt_h
->partition_entry_array_crc32
= cpu_to_le32(calc_crc32
);
389 calc_crc32
= efi_crc32((const unsigned char *)gpt_h
,
390 le32_to_cpu(gpt_h
->header_size
));
391 gpt_h
->header_crc32
= cpu_to_le32(calc_crc32
);
393 /* Write the First GPT to the block right after the Legacy MBR */
394 if (blk_dwrite(dev_desc
, 1, 1, gpt_h
) != 1)
397 if (blk_dwrite(dev_desc
, le64_to_cpu(gpt_h
->partition_entry_lba
),
398 pte_blk_cnt
, gpt_e
) != pte_blk_cnt
)
401 prepare_backup_gpt_header(gpt_h
);
403 if (blk_dwrite(dev_desc
, (lbaint_t
)le64_to_cpu(gpt_h
->last_usable_lba
)
404 + 1, pte_blk_cnt
, gpt_e
) != pte_blk_cnt
)
407 if (blk_dwrite(dev_desc
, (lbaint_t
)le64_to_cpu(gpt_h
->my_lba
), 1,
411 debug("GPT successfully written to block device!\n");
415 printf("** Can't write to device %d **\n", dev_desc
->devnum
);
419 int gpt_fill_pte(struct blk_desc
*dev_desc
,
420 gpt_header
*gpt_h
, gpt_entry
*gpt_e
,
421 struct disk_partition
*partitions
, int parts
)
423 lbaint_t offset
= (lbaint_t
)le64_to_cpu(gpt_h
->first_usable_lba
);
424 lbaint_t last_usable_lba
= (lbaint_t
)
425 le64_to_cpu(gpt_h
->last_usable_lba
);
427 size_t efiname_len
, dosname_len
;
428 #if CONFIG_IS_ENABLED(PARTITION_UUIDS)
430 unsigned char *bin_uuid
;
432 #ifdef CONFIG_PARTITION_TYPE_GUID
434 unsigned char *bin_type_guid
;
436 size_t hdr_start
= gpt_h
->my_lba
;
437 size_t hdr_end
= hdr_start
+ 1;
439 size_t pte_start
= gpt_h
->partition_entry_lba
;
440 size_t pte_end
= pte_start
+
441 gpt_h
->num_partition_entries
* gpt_h
->sizeof_partition_entry
/
444 for (i
= 0; i
< parts
; i
++) {
445 /* partition starting lba */
446 lbaint_t start
= partitions
[i
].start
;
447 lbaint_t size
= partitions
[i
].size
;
450 offset
= start
+ size
;
457 * If our partition overlaps with either the GPT
458 * header, or the partition entry, reject it.
460 if (((start
< hdr_end
&& hdr_start
< (start
+ size
)) ||
461 (start
< pte_end
&& pte_start
< (start
+ size
)))) {
462 printf("Partition overlap\n");
466 gpt_e
[i
].starting_lba
= cpu_to_le64(start
);
468 if (offset
> (last_usable_lba
+ 1)) {
469 printf("Partitions layout exceds disk size\n");
472 /* partition ending lba */
473 if ((i
== parts
- 1) && (size
== 0))
474 /* extend the last partition to maximuim */
475 gpt_e
[i
].ending_lba
= gpt_h
->last_usable_lba
;
477 gpt_e
[i
].ending_lba
= cpu_to_le64(offset
- 1);
479 #ifdef CONFIG_PARTITION_TYPE_GUID
480 str_type_guid
= partitions
[i
].type_guid
;
481 bin_type_guid
= gpt_e
[i
].partition_type_guid
.b
;
482 if (strlen(str_type_guid
)) {
483 if (uuid_str_to_bin(str_type_guid
, bin_type_guid
,
484 UUID_STR_FORMAT_GUID
)) {
485 printf("Partition no. %d: invalid type guid: %s\n",
490 /* default partition type GUID */
491 memcpy(bin_type_guid
,
492 &partition_basic_data_guid
, 16);
495 /* partition type GUID */
496 memcpy(gpt_e
[i
].partition_type_guid
.b
,
497 &partition_basic_data_guid
, 16);
500 #if CONFIG_IS_ENABLED(PARTITION_UUIDS)
501 str_uuid
= partitions
[i
].uuid
;
502 bin_uuid
= gpt_e
[i
].unique_partition_guid
.b
;
504 if (uuid_str_to_bin(str_uuid
, bin_uuid
, UUID_STR_FORMAT_GUID
)) {
505 printf("Partition no. %d: invalid guid: %s\n",
511 /* partition attributes */
512 memset(&gpt_e
[i
].attributes
, 0,
513 sizeof(gpt_entry_attributes
));
515 if (partitions
[i
].bootable
& PART_BOOTABLE
)
516 gpt_e
[i
].attributes
.fields
.legacy_bios_bootable
= 1;
519 efiname_len
= sizeof(gpt_e
[i
].partition_name
)
520 / sizeof(efi_char16_t
);
521 dosname_len
= sizeof(partitions
[i
].name
);
523 memset(gpt_e
[i
].partition_name
, 0,
524 sizeof(gpt_e
[i
].partition_name
));
526 for (k
= 0; k
< min(dosname_len
, efiname_len
); k
++)
527 gpt_e
[i
].partition_name
[k
] =
528 (efi_char16_t
)(partitions
[i
].name
[k
]);
530 debug("%s: name: %s offset[%d]: 0x" LBAF
531 " size[%d]: 0x" LBAF
"\n",
532 __func__
, partitions
[i
].name
, i
,
539 static uint32_t partition_entries_offset(struct blk_desc
*dev_desc
)
541 uint32_t offset_blks
= 2;
542 uint32_t __maybe_unused offset_bytes
;
543 int __maybe_unused config_offset
;
545 #if defined(CONFIG_EFI_PARTITION_ENTRIES_OFF)
547 * Some architectures require their SPL loader at a fixed
548 * address within the first 16KB of the disk. To avoid an
549 * overlap with the partition entries of the EFI partition
550 * table, the first safe offset (in bytes, from the start of
551 * the disk) for the entries can be set in
552 * CONFIG_EFI_PARTITION_ENTRIES_OFF.
555 PAD_TO_BLOCKSIZE(CONFIG_EFI_PARTITION_ENTRIES_OFF
, dev_desc
);
556 offset_blks
= offset_bytes
/ dev_desc
->blksz
;
559 #if defined(CONFIG_OF_CONTROL)
561 * Allow the offset of the first partition entires (in bytes
562 * from the start of the device) to be specified as a property
563 * of the device tree '/config' node.
565 config_offset
= ofnode_conf_read_int(
566 "u-boot,efi-partition-entries-offset", -EINVAL
);
567 if (config_offset
!= -EINVAL
) {
568 offset_bytes
= PAD_TO_BLOCKSIZE(config_offset
, dev_desc
);
569 offset_blks
= offset_bytes
/ dev_desc
->blksz
;
573 debug("efi: partition entries offset (in blocks): %d\n", offset_blks
);
576 * The earliest LBA this can be at is LBA#2 (i.e. right behind
577 * the (protective) MBR and the GPT header.
585 int gpt_fill_header(struct blk_desc
*dev_desc
, gpt_header
*gpt_h
,
586 char *str_guid
, int parts_count
)
588 gpt_h
->signature
= cpu_to_le64(GPT_HEADER_SIGNATURE_UBOOT
);
589 gpt_h
->revision
= cpu_to_le32(GPT_HEADER_REVISION_V1
);
590 gpt_h
->header_size
= cpu_to_le32(sizeof(gpt_header
));
591 gpt_h
->my_lba
= cpu_to_le64(1);
592 gpt_h
->alternate_lba
= cpu_to_le64(dev_desc
->lba
- 1);
593 gpt_h
->last_usable_lba
= cpu_to_le64(dev_desc
->lba
- 34);
594 gpt_h
->partition_entry_lba
=
595 cpu_to_le64(partition_entries_offset(dev_desc
));
596 gpt_h
->first_usable_lba
=
597 cpu_to_le64(le64_to_cpu(gpt_h
->partition_entry_lba
) + 32);
598 gpt_h
->num_partition_entries
= cpu_to_le32(GPT_ENTRY_NUMBERS
);
599 gpt_h
->sizeof_partition_entry
= cpu_to_le32(sizeof(gpt_entry
));
600 gpt_h
->header_crc32
= 0;
601 gpt_h
->partition_entry_array_crc32
= 0;
603 if (uuid_str_to_bin(str_guid
, gpt_h
->disk_guid
.b
, UUID_STR_FORMAT_GUID
))
609 int gpt_restore(struct blk_desc
*dev_desc
, char *str_disk_guid
,
610 struct disk_partition
*partitions
, int parts_count
)
616 size
= PAD_TO_BLOCKSIZE(sizeof(gpt_header
), dev_desc
);
617 gpt_h
= malloc_cache_aligned(size
);
619 printf("%s: calloc failed!\n", __func__
);
622 memset(gpt_h
, 0, size
);
624 size
= PAD_TO_BLOCKSIZE(GPT_ENTRY_NUMBERS
* sizeof(gpt_entry
),
626 gpt_e
= malloc_cache_aligned(size
);
628 printf("%s: calloc failed!\n", __func__
);
632 memset(gpt_e
, 0, size
);
634 /* Generate Primary GPT header (LBA1) */
635 ret
= gpt_fill_header(dev_desc
, gpt_h
, str_disk_guid
, parts_count
);
639 /* Generate partition entries */
640 ret
= gpt_fill_pte(dev_desc
, gpt_h
, gpt_e
, partitions
, parts_count
);
644 /* Write GPT partition table */
645 ret
= write_gpt_table(dev_desc
, gpt_h
, gpt_e
);
654 * gpt_convert_efi_name_to_char() - convert u16 string to char string
656 * TODO: this conversion only supports ANSI characters
659 * @es: u16 string to be converted
660 * @n: size of target buffer
662 static void gpt_convert_efi_name_to_char(char *s
, void *es
, int n
)
669 for (i
= 0, j
= 0; j
< n
; i
+= 2, j
++) {
676 int gpt_verify_headers(struct blk_desc
*dev_desc
, gpt_header
*gpt_head
,
680 * This function validates AND
681 * fills in the GPT header and PTE
683 if (is_gpt_valid(dev_desc
,
684 GPT_PRIMARY_PARTITION_TABLE_LBA
,
685 gpt_head
, gpt_pte
) != 1) {
686 printf("%s: *** ERROR: Invalid GPT ***\n",
691 /* Free pte before allocating again */
695 * Check that the alternate_lba entry points to the last LBA
697 if (le64_to_cpu(gpt_head
->alternate_lba
) != (dev_desc
->lba
- 1)) {
698 printf("%s: *** ERROR: Misplaced Backup GPT ***\n",
703 if (is_gpt_valid(dev_desc
, (dev_desc
->lba
- 1),
704 gpt_head
, gpt_pte
) != 1) {
705 printf("%s: *** ERROR: Invalid Backup GPT ***\n",
713 int gpt_verify_partitions(struct blk_desc
*dev_desc
,
714 struct disk_partition
*partitions
, int parts
,
715 gpt_header
*gpt_head
, gpt_entry
**gpt_pte
)
717 char efi_str
[PARTNAME_SZ
+ 1];
722 ret
= gpt_verify_headers(dev_desc
, gpt_head
, gpt_pte
);
728 for (i
= 0; i
< parts
; i
++) {
729 if (i
== gpt_head
->num_partition_entries
) {
730 pr_err("More partitions than allowed!\n");
734 /* Check if GPT and ENV partition names match */
735 gpt_convert_efi_name_to_char(efi_str
, gpt_e
[i
].partition_name
,
738 debug("%s: part: %2d name - GPT: %16s, ENV: %16s ",
739 __func__
, i
, efi_str
, partitions
[i
].name
);
741 if (strncmp(efi_str
, (char *)partitions
[i
].name
,
742 sizeof(partitions
->name
))) {
743 pr_err("Partition name: %s does not match %s!\n",
744 efi_str
, (char *)partitions
[i
].name
);
748 /* Check if GPT and ENV sizes match */
749 gpt_part_size
= le64_to_cpu(gpt_e
[i
].ending_lba
) -
750 le64_to_cpu(gpt_e
[i
].starting_lba
) + 1;
751 debug("size(LBA) - GPT: %8llu, ENV: %8llu ",
752 (unsigned long long)gpt_part_size
,
753 (unsigned long long)partitions
[i
].size
);
755 if (le64_to_cpu(gpt_part_size
) != partitions
[i
].size
) {
756 /* We do not check the extend partition size */
757 if ((i
== parts
- 1) && (partitions
[i
].size
== 0))
760 pr_err("Partition %s size: %llu does not match %llu!\n",
761 efi_str
, (unsigned long long)gpt_part_size
,
762 (unsigned long long)partitions
[i
].size
);
767 * Start address is optional - check only if provided
768 * in '$partition' variable
770 if (!partitions
[i
].start
) {
775 /* Check if GPT and ENV start LBAs match */
776 debug("start LBA - GPT: %8llu, ENV: %8llu\n",
777 le64_to_cpu(gpt_e
[i
].starting_lba
),
778 (unsigned long long)partitions
[i
].start
);
780 if (le64_to_cpu(gpt_e
[i
].starting_lba
) != partitions
[i
].start
) {
781 pr_err("Partition %s start: %llu does not match %llu!\n",
782 efi_str
, le64_to_cpu(gpt_e
[i
].starting_lba
),
783 (unsigned long long)partitions
[i
].start
);
791 int is_valid_gpt_buf(struct blk_desc
*dev_desc
, void *buf
)
796 /* determine start of GPT Header in the buffer */
797 gpt_h
= buf
+ (GPT_PRIMARY_PARTITION_TABLE_LBA
*
799 if (validate_gpt_header(gpt_h
, GPT_PRIMARY_PARTITION_TABLE_LBA
,
803 /* determine start of GPT Entries in the buffer */
804 gpt_e
= buf
+ (le64_to_cpu(gpt_h
->partition_entry_lba
) *
806 if (validate_gpt_entries(gpt_h
, gpt_e
))
812 int write_mbr_and_gpt_partitions(struct blk_desc
*dev_desc
, void *buf
)
820 if (is_valid_gpt_buf(dev_desc
, buf
))
823 /* determine start of GPT Header in the buffer */
824 gpt_h
= buf
+ (GPT_PRIMARY_PARTITION_TABLE_LBA
*
827 /* determine start of GPT Entries in the buffer */
828 gpt_e
= buf
+ (le64_to_cpu(gpt_h
->partition_entry_lba
) *
830 gpt_e_blk_cnt
= BLOCK_CNT((le32_to_cpu(gpt_h
->num_partition_entries
) *
831 le32_to_cpu(gpt_h
->sizeof_partition_entry
)),
835 lba
= 0; /* MBR is always at 0 */
836 cnt
= 1; /* MBR (1 block) */
837 if (blk_dwrite(dev_desc
, lba
, cnt
, buf
) != cnt
) {
838 printf("%s: failed writing '%s' (%d blks at 0x" LBAF
")\n",
839 __func__
, "MBR", cnt
, lba
);
843 /* write Primary GPT */
844 lba
= GPT_PRIMARY_PARTITION_TABLE_LBA
;
845 cnt
= 1; /* GPT Header (1 block) */
846 if (blk_dwrite(dev_desc
, lba
, cnt
, gpt_h
) != cnt
) {
847 printf("%s: failed writing '%s' (%d blks at 0x" LBAF
")\n",
848 __func__
, "Primary GPT Header", cnt
, lba
);
852 lba
= le64_to_cpu(gpt_h
->partition_entry_lba
);
854 if (blk_dwrite(dev_desc
, lba
, cnt
, gpt_e
) != cnt
) {
855 printf("%s: failed writing '%s' (%d blks at 0x" LBAF
")\n",
856 __func__
, "Primary GPT Entries", cnt
, lba
);
860 prepare_backup_gpt_header(gpt_h
);
862 /* write Backup GPT */
863 lba
= le64_to_cpu(gpt_h
->partition_entry_lba
);
865 if (blk_dwrite(dev_desc
, lba
, cnt
, gpt_e
) != cnt
) {
866 printf("%s: failed writing '%s' (%d blks at 0x" LBAF
")\n",
867 __func__
, "Backup GPT Entries", cnt
, lba
);
871 lba
= le64_to_cpu(gpt_h
->my_lba
);
872 cnt
= 1; /* GPT Header (1 block) */
873 if (blk_dwrite(dev_desc
, lba
, cnt
, gpt_h
) != cnt
) {
874 printf("%s: failed writing '%s' (%d blks at 0x" LBAF
")\n",
875 __func__
, "Backup GPT Header", cnt
, lba
);
879 /* Update the partition table entries*/
890 * pmbr_part_valid(): Check for EFI partition signature
892 * Returns: 1 if EFI GPT partition type is found.
894 static int pmbr_part_valid(struct partition
*part
)
896 if (part
->sys_ind
== EFI_PMBR_OSTYPE_EFI_GPT
&&
897 get_unaligned_le32(&part
->start_sect
) == 1UL) {
905 * is_pmbr_valid(): test Protective MBR for validity
907 * Returns: 1 if PMBR is valid, 0 otherwise.
908 * Validity depends on two things:
909 * 1) MSDOS signature is in the last two bytes of the MBR
910 * 2) One partition of type 0xEE is found, checked by pmbr_part_valid()
912 static int is_pmbr_valid(legacy_mbr
* mbr
)
916 if (!mbr
|| le16_to_cpu(mbr
->signature
) != MSDOS_MBR_SIGNATURE
)
919 for (i
= 0; i
< 4; i
++) {
920 if (pmbr_part_valid(&mbr
->partition_record
[i
])) {
928 * is_gpt_valid() - tests one GPT header and PTEs for validity
930 * lba is the logical block address of the GPT header to test
931 * gpt is a GPT header ptr, filled on return.
932 * ptes is a PTEs ptr, filled on return.
934 * Description: returns 1 if valid, 0 on error, 2 if ignored header
935 * If valid, returns pointers to PTEs.
937 static int is_gpt_valid(struct blk_desc
*dev_desc
, u64 lba
,
938 gpt_header
*pgpt_head
, gpt_entry
**pgpt_pte
)
940 /* Confirm valid arguments prior to allocation. */
941 if (!dev_desc
|| !pgpt_head
) {
942 printf("%s: Invalid Argument(s)\n", __func__
);
946 ALLOC_CACHE_ALIGN_BUFFER_PAD(legacy_mbr
, mbr
, 1, dev_desc
->blksz
);
948 /* Read MBR Header from device */
949 if (blk_dread(dev_desc
, 0, 1, (ulong
*)mbr
) != 1) {
950 printf("*** ERROR: Can't read MBR header ***\n");
954 /* Read GPT Header from device */
955 if (blk_dread(dev_desc
, (lbaint_t
)lba
, 1, pgpt_head
) != 1) {
956 printf("*** ERROR: Can't read GPT header ***\n");
960 /* Invalid but nothing to yell about. */
961 if (le64_to_cpu(pgpt_head
->signature
) == GPT_HEADER_CHROMEOS_IGNORE
) {
962 debug("ChromeOS 'IGNOREME' GPT header found and ignored\n");
966 if (validate_gpt_header(pgpt_head
, (lbaint_t
)lba
, dev_desc
->lba
))
969 if (dev_desc
->sig_type
== SIG_TYPE_NONE
) {
970 efi_guid_t empty
= {};
971 if (memcmp(&pgpt_head
->disk_guid
, &empty
, sizeof(empty
))) {
972 dev_desc
->sig_type
= SIG_TYPE_GUID
;
973 memcpy(&dev_desc
->guid_sig
, &pgpt_head
->disk_guid
,
975 } else if (mbr
->unique_mbr_signature
!= 0) {
976 dev_desc
->sig_type
= SIG_TYPE_MBR
;
977 dev_desc
->mbr_sig
= mbr
->unique_mbr_signature
;
981 /* Read and allocate Partition Table Entries */
982 *pgpt_pte
= alloc_read_gpt_entries(dev_desc
, pgpt_head
);
983 if (*pgpt_pte
== NULL
) {
984 printf("GPT: Failed to allocate memory for PTE\n");
988 if (validate_gpt_entries(pgpt_head
, *pgpt_pte
)) {
993 /* We're done, all's well */
998 * find_valid_gpt() - finds a valid GPT header and PTEs
1000 * gpt is a GPT header ptr, filled on return.
1001 * ptes is a PTEs ptr, filled on return.
1003 * Description: returns 1 if found a valid gpt, 0 on error.
1004 * If valid, returns pointers to PTEs.
1006 static int find_valid_gpt(struct blk_desc
*dev_desc
, gpt_header
*gpt_head
,
1007 gpt_entry
**pgpt_pte
)
1011 r
= is_gpt_valid(dev_desc
, GPT_PRIMARY_PARTITION_TABLE_LBA
, gpt_head
,
1016 printf("%s: *** ERROR: Invalid GPT ***\n", __func__
);
1018 if (is_gpt_valid(dev_desc
, (dev_desc
->lba
- 1), gpt_head
,
1020 printf("%s: *** ERROR: Invalid Backup GPT ***\n",
1025 printf("%s: *** Using Backup GPT ***\n",
1032 * alloc_read_gpt_entries(): reads partition entries from disk
1036 * Description: Returns ptes on success, NULL on error.
1037 * Allocates space for PTEs based on information found in @gpt.
1038 * Notes: remember to free pte when you're done!
1040 static gpt_entry
*alloc_read_gpt_entries(struct blk_desc
*dev_desc
,
1041 gpt_header
*pgpt_head
)
1043 size_t count
= 0, blk_cnt
;
1045 gpt_entry
*pte
= NULL
;
1047 if (!dev_desc
|| !pgpt_head
) {
1048 printf("%s: Invalid Argument(s)\n", __func__
);
1052 count
= le32_to_cpu(pgpt_head
->num_partition_entries
) *
1053 le32_to_cpu(pgpt_head
->sizeof_partition_entry
);
1055 debug("%s: count = %u * %u = %lu\n", __func__
,
1056 (u32
) le32_to_cpu(pgpt_head
->num_partition_entries
),
1057 (u32
) le32_to_cpu(pgpt_head
->sizeof_partition_entry
),
1060 /* Allocate memory for PTE, remember to FREE */
1062 pte
= memalign(ARCH_DMA_MINALIGN
,
1063 PAD_TO_BLOCKSIZE(count
, dev_desc
));
1066 if (count
== 0 || pte
== NULL
) {
1067 printf("%s: ERROR: Can't allocate %#lX bytes for GPT Entries\n",
1068 __func__
, (ulong
)count
);
1072 /* Read GPT Entries from device */
1073 blk
= le64_to_cpu(pgpt_head
->partition_entry_lba
);
1074 blk_cnt
= BLOCK_CNT(count
, dev_desc
);
1075 if (blk_dread(dev_desc
, blk
, (lbaint_t
)blk_cnt
, pte
) != blk_cnt
) {
1076 printf("*** ERROR: Can't read GPT Entries ***\n");
1084 * is_pte_valid(): validates a single Partition Table Entry
1085 * @gpt_entry - Pointer to a single Partition Table Entry
1087 * Description: returns 1 if valid, 0 on error.
1089 static int is_pte_valid(gpt_entry
* pte
)
1091 efi_guid_t unused_guid
;
1094 printf("%s: Invalid Argument(s)\n", __func__
);
1098 /* Only one validation for now:
1099 * The GUID Partition Type != Unused Entry (ALL-ZERO)
1101 memset(unused_guid
.b
, 0, sizeof(unused_guid
.b
));
1103 if (memcmp(pte
->partition_type_guid
.b
, unused_guid
.b
,
1104 sizeof(unused_guid
.b
)) == 0) {
1106 debug("%s: Found an unused PTE GUID at 0x%08X\n", __func__
,
1107 (unsigned int)(uintptr_t)pte
);
1116 * Add an 'a_' prefix so it comes before 'dos' in the linker list. We need to
1117 * check EFI first, since a DOS partition is often used as a 'protective MBR'
1120 U_BOOT_PART_TYPE(a_efi
) = {
1122 .part_type
= PART_TYPE_EFI
,
1123 .max_entries
= GPT_ENTRY_NUMBERS
,
1124 .get_info
= part_get_info_ptr(part_get_info_efi
),
1125 .print
= part_print_ptr(part_print_efi
),
1126 .test
= part_test_efi
,
1128 #endif /* CONFIG_HAVE_BLOCK_DEVICE */