2 * Copyright (C) 2008 RuggedCom, Inc.
3 * Richard Retanubun <RichardRetanubun@RuggedCom.com>
5 * SPDX-License-Identifier: GPL-2.0+
10 * when CONFIG_SYS_64BIT_LBA is not defined, lbaint_t is 32 bits; this
11 * limits the maximum size of addressable storage to < 2 Terra Bytes
13 #include <asm/unaligned.h>
22 #include <linux/compiler.h>
23 #include <linux/ctype.h>
25 DECLARE_GLOBAL_DATA_PTR
;
27 #ifdef HAVE_BLOCK_DEVICE
29 * efi_crc32() - EFI version of crc32 function
30 * @buf: buffer to calculate crc32 of
31 * @len - length of buf
33 * Description: Returns EFI-style CRC32 value for @buf
35 static inline u32
efi_crc32(const void *buf
, u32 len
)
37 return crc32(0, buf
, len
);
41 * Private function prototypes
44 static int pmbr_part_valid(struct partition
*part
);
45 static int is_pmbr_valid(legacy_mbr
* mbr
);
46 static int is_gpt_valid(struct blk_desc
*dev_desc
, u64 lba
,
47 gpt_header
*pgpt_head
, gpt_entry
**pgpt_pte
);
48 static gpt_entry
*alloc_read_gpt_entries(struct blk_desc
*dev_desc
,
49 gpt_header
*pgpt_head
);
50 static int is_pte_valid(gpt_entry
* pte
);
52 static char *print_efiname(gpt_entry
*pte
)
54 static char name
[PARTNAME_SZ
+ 1];
56 for (i
= 0; i
< PARTNAME_SZ
; i
++) {
58 c
= pte
->partition_name
[i
] & 0xff;
59 c
= (c
&& !isprint(c
)) ? '.' : c
;
62 name
[PARTNAME_SZ
] = 0;
66 static efi_guid_t system_guid
= PARTITION_SYSTEM_GUID
;
68 static inline int is_bootable(gpt_entry
*p
)
70 return p
->attributes
.fields
.legacy_bios_bootable
||
71 !memcmp(&(p
->partition_type_guid
), &system_guid
,
75 static int validate_gpt_header(gpt_header
*gpt_h
, lbaint_t lba
,
78 uint32_t crc32_backup
= 0;
81 /* Check the GPT header signature */
82 if (le64_to_cpu(gpt_h
->signature
) != GPT_HEADER_SIGNATURE
) {
83 printf("%s signature is wrong: 0x%llX != 0x%llX\n",
84 "GUID Partition Table Header",
85 le64_to_cpu(gpt_h
->signature
),
86 GPT_HEADER_SIGNATURE
);
90 /* Check the GUID Partition Table CRC */
91 memcpy(&crc32_backup
, &gpt_h
->header_crc32
, sizeof(crc32_backup
));
92 memset(&gpt_h
->header_crc32
, 0, sizeof(gpt_h
->header_crc32
));
94 calc_crc32
= efi_crc32((const unsigned char *)gpt_h
,
95 le32_to_cpu(gpt_h
->header_size
));
97 memcpy(&gpt_h
->header_crc32
, &crc32_backup
, sizeof(crc32_backup
));
99 if (calc_crc32
!= le32_to_cpu(crc32_backup
)) {
100 printf("%s CRC is wrong: 0x%x != 0x%x\n",
101 "GUID Partition Table Header",
102 le32_to_cpu(crc32_backup
), calc_crc32
);
107 * Check that the my_lba entry points to the LBA that contains the GPT
109 if (le64_to_cpu(gpt_h
->my_lba
) != lba
) {
110 printf("GPT: my_lba incorrect: %llX != " LBAF
"\n",
111 le64_to_cpu(gpt_h
->my_lba
),
117 * Check that the first_usable_lba and that the last_usable_lba are
120 if (le64_to_cpu(gpt_h
->first_usable_lba
) > lastlba
) {
121 printf("GPT: first_usable_lba incorrect: %llX > " LBAF
"\n",
122 le64_to_cpu(gpt_h
->first_usable_lba
), lastlba
);
125 if (le64_to_cpu(gpt_h
->last_usable_lba
) > lastlba
) {
126 printf("GPT: last_usable_lba incorrect: %llX > " LBAF
"\n",
127 le64_to_cpu(gpt_h
->last_usable_lba
), lastlba
);
131 debug("GPT: first_usable_lba: %llX last_usable_lba: %llX last lba: "
132 LBAF
"\n", le64_to_cpu(gpt_h
->first_usable_lba
),
133 le64_to_cpu(gpt_h
->last_usable_lba
), lastlba
);
138 static int validate_gpt_entries(gpt_header
*gpt_h
, gpt_entry
*gpt_e
)
142 /* Check the GUID Partition Table Entry Array CRC */
143 calc_crc32
= efi_crc32((const unsigned char *)gpt_e
,
144 le32_to_cpu(gpt_h
->num_partition_entries
) *
145 le32_to_cpu(gpt_h
->sizeof_partition_entry
));
147 if (calc_crc32
!= le32_to_cpu(gpt_h
->partition_entry_array_crc32
)) {
148 printf("%s: 0x%x != 0x%x\n",
149 "GUID Partition Table Entry Array CRC is wrong",
150 le32_to_cpu(gpt_h
->partition_entry_array_crc32
),
158 static void prepare_backup_gpt_header(gpt_header
*gpt_h
)
163 /* recalculate the values for the Backup GPT Header */
164 val
= le64_to_cpu(gpt_h
->my_lba
);
165 gpt_h
->my_lba
= gpt_h
->alternate_lba
;
166 gpt_h
->alternate_lba
= cpu_to_le64(val
);
167 gpt_h
->partition_entry_lba
=
168 cpu_to_le64(le64_to_cpu(gpt_h
->last_usable_lba
) + 1);
169 gpt_h
->header_crc32
= 0;
171 calc_crc32
= efi_crc32((const unsigned char *)gpt_h
,
172 le32_to_cpu(gpt_h
->header_size
));
173 gpt_h
->header_crc32
= cpu_to_le32(calc_crc32
);
176 #if CONFIG_IS_ENABLED(EFI_PARTITION)
178 * Public Functions (include/part.h)
181 void part_print_efi(struct blk_desc
*dev_desc
)
183 ALLOC_CACHE_ALIGN_BUFFER_PAD(gpt_header
, gpt_head
, 1, dev_desc
->blksz
);
184 gpt_entry
*gpt_pte
= NULL
;
187 unsigned char *uuid_bin
;
189 /* This function validates AND fills in the GPT header and PTE */
190 if (is_gpt_valid(dev_desc
, GPT_PRIMARY_PARTITION_TABLE_LBA
,
191 gpt_head
, &gpt_pte
) != 1) {
192 printf("%s: *** ERROR: Invalid GPT ***\n", __func__
);
193 if (is_gpt_valid(dev_desc
, (dev_desc
->lba
- 1),
194 gpt_head
, &gpt_pte
) != 1) {
195 printf("%s: *** ERROR: Invalid Backup GPT ***\n",
199 printf("%s: *** Using Backup GPT ***\n",
204 debug("%s: gpt-entry at %p\n", __func__
, gpt_pte
);
206 printf("Part\tStart LBA\tEnd LBA\t\tName\n");
207 printf("\tAttributes\n");
208 printf("\tType GUID\n");
209 printf("\tPartition GUID\n");
211 for (i
= 0; i
< le32_to_cpu(gpt_head
->num_partition_entries
); i
++) {
212 /* Stop at the first non valid PTE */
213 if (!is_pte_valid(&gpt_pte
[i
]))
216 printf("%3d\t0x%08llx\t0x%08llx\t\"%s\"\n", (i
+ 1),
217 le64_to_cpu(gpt_pte
[i
].starting_lba
),
218 le64_to_cpu(gpt_pte
[i
].ending_lba
),
219 print_efiname(&gpt_pte
[i
]));
220 printf("\tattrs:\t0x%016llx\n", gpt_pte
[i
].attributes
.raw
);
221 uuid_bin
= (unsigned char *)gpt_pte
[i
].partition_type_guid
.b
;
222 uuid_bin_to_str(uuid_bin
, uuid
, UUID_STR_FORMAT_GUID
);
223 printf("\ttype:\t%s\n", uuid
);
224 #ifdef CONFIG_PARTITION_TYPE_GUID
225 if (!uuid_guid_get_str(uuid_bin
, uuid
))
226 printf("\ttype:\t%s\n", uuid
);
228 uuid_bin
= (unsigned char *)gpt_pte
[i
].unique_partition_guid
.b
;
229 uuid_bin_to_str(uuid_bin
, uuid
, UUID_STR_FORMAT_GUID
);
230 printf("\tguid:\t%s\n", uuid
);
233 /* Remember to free pte */
238 int part_get_info_efi(struct blk_desc
*dev_desc
, int part
,
239 disk_partition_t
*info
)
241 ALLOC_CACHE_ALIGN_BUFFER_PAD(gpt_header
, gpt_head
, 1, dev_desc
->blksz
);
242 gpt_entry
*gpt_pte
= NULL
;
244 /* "part" argument must be at least 1 */
246 printf("%s: Invalid Argument(s)\n", __func__
);
250 /* This function validates AND fills in the GPT header and PTE */
251 if (is_gpt_valid(dev_desc
, GPT_PRIMARY_PARTITION_TABLE_LBA
,
252 gpt_head
, &gpt_pte
) != 1) {
253 printf("%s: *** ERROR: Invalid GPT ***\n", __func__
);
254 if (is_gpt_valid(dev_desc
, (dev_desc
->lba
- 1),
255 gpt_head
, &gpt_pte
) != 1) {
256 printf("%s: *** ERROR: Invalid Backup GPT ***\n",
260 printf("%s: *** Using Backup GPT ***\n",
265 if (part
> le32_to_cpu(gpt_head
->num_partition_entries
) ||
266 !is_pte_valid(&gpt_pte
[part
- 1])) {
267 debug("%s: *** ERROR: Invalid partition number %d ***\n",
273 /* The 'lbaint_t' casting may limit the maximum disk size to 2 TB */
274 info
->start
= (lbaint_t
)le64_to_cpu(gpt_pte
[part
- 1].starting_lba
);
275 /* The ending LBA is inclusive, to calculate size, add 1 to it */
276 info
->size
= (lbaint_t
)le64_to_cpu(gpt_pte
[part
- 1].ending_lba
) + 1
278 info
->blksz
= dev_desc
->blksz
;
280 sprintf((char *)info
->name
, "%s",
281 print_efiname(&gpt_pte
[part
- 1]));
282 strcpy((char *)info
->type
, "U-Boot");
283 info
->bootable
= is_bootable(&gpt_pte
[part
- 1]);
284 #if CONFIG_IS_ENABLED(PARTITION_UUIDS)
285 uuid_bin_to_str(gpt_pte
[part
- 1].unique_partition_guid
.b
, info
->uuid
,
286 UUID_STR_FORMAT_GUID
);
288 #ifdef CONFIG_PARTITION_TYPE_GUID
289 uuid_bin_to_str(gpt_pte
[part
- 1].partition_type_guid
.b
,
290 info
->type_guid
, UUID_STR_FORMAT_GUID
);
293 debug("%s: start 0x" LBAF
", size 0x" LBAF
", name %s\n", __func__
,
294 info
->start
, info
->size
, info
->name
);
296 /* Remember to free pte */
301 static int part_test_efi(struct blk_desc
*dev_desc
)
303 ALLOC_CACHE_ALIGN_BUFFER_PAD(legacy_mbr
, legacymbr
, 1, dev_desc
->blksz
);
305 /* Read legacy MBR from block 0 and validate it */
306 if ((blk_dread(dev_desc
, 0, 1, (ulong
*)legacymbr
) != 1)
307 || (is_pmbr_valid(legacymbr
) != 1)) {
314 * set_protective_mbr(): Set the EFI protective MBR
315 * @param dev_desc - block device descriptor
317 * @return - zero on success, otherwise error
319 static int set_protective_mbr(struct blk_desc
*dev_desc
)
321 /* Setup the Protective MBR */
322 ALLOC_CACHE_ALIGN_BUFFER(legacy_mbr
, p_mbr
, 1);
323 memset(p_mbr
, 0, sizeof(*p_mbr
));
326 printf("%s: calloc failed!\n", __func__
);
330 /* Read MBR to backup boot code if it exists */
331 if (blk_dread(dev_desc
, 0, 1, p_mbr
) != 1) {
332 error("** Can't read from device %d **\n", dev_desc
->devnum
);
336 /* Append signature */
337 p_mbr
->signature
= MSDOS_MBR_SIGNATURE
;
338 p_mbr
->partition_record
[0].sys_ind
= EFI_PMBR_OSTYPE_EFI_GPT
;
339 p_mbr
->partition_record
[0].start_sect
= 1;
340 p_mbr
->partition_record
[0].nr_sects
= (u32
) dev_desc
->lba
- 1;
342 /* Write MBR sector to the MMC device */
343 if (blk_dwrite(dev_desc
, 0, 1, p_mbr
) != 1) {
344 printf("** Can't write to device %d **\n",
352 int write_gpt_table(struct blk_desc
*dev_desc
,
353 gpt_header
*gpt_h
, gpt_entry
*gpt_e
)
355 const int pte_blk_cnt
= BLOCK_CNT((gpt_h
->num_partition_entries
356 * sizeof(gpt_entry
)), dev_desc
);
359 debug("max lba: %x\n", (u32
) dev_desc
->lba
);
360 /* Setup the Protective MBR */
361 if (set_protective_mbr(dev_desc
) < 0)
364 /* Generate CRC for the Primary GPT Header */
365 calc_crc32
= efi_crc32((const unsigned char *)gpt_e
,
366 le32_to_cpu(gpt_h
->num_partition_entries
) *
367 le32_to_cpu(gpt_h
->sizeof_partition_entry
));
368 gpt_h
->partition_entry_array_crc32
= cpu_to_le32(calc_crc32
);
370 calc_crc32
= efi_crc32((const unsigned char *)gpt_h
,
371 le32_to_cpu(gpt_h
->header_size
));
372 gpt_h
->header_crc32
= cpu_to_le32(calc_crc32
);
374 /* Write the First GPT to the block right after the Legacy MBR */
375 if (blk_dwrite(dev_desc
, 1, 1, gpt_h
) != 1)
378 if (blk_dwrite(dev_desc
, le64_to_cpu(gpt_h
->partition_entry_lba
),
379 pte_blk_cnt
, gpt_e
) != pte_blk_cnt
)
382 prepare_backup_gpt_header(gpt_h
);
384 if (blk_dwrite(dev_desc
, (lbaint_t
)le64_to_cpu(gpt_h
->last_usable_lba
)
385 + 1, pte_blk_cnt
, gpt_e
) != pte_blk_cnt
)
388 if (blk_dwrite(dev_desc
, (lbaint_t
)le64_to_cpu(gpt_h
->my_lba
), 1,
392 debug("GPT successfully written to block device!\n");
396 printf("** Can't write to device %d **\n", dev_desc
->devnum
);
400 int gpt_fill_pte(gpt_header
*gpt_h
, gpt_entry
*gpt_e
,
401 disk_partition_t
*partitions
, int parts
)
403 lbaint_t offset
= (lbaint_t
)le64_to_cpu(gpt_h
->first_usable_lba
);
405 lbaint_t last_usable_lba
= (lbaint_t
)
406 le64_to_cpu(gpt_h
->last_usable_lba
);
408 size_t efiname_len
, dosname_len
;
409 #if CONFIG_IS_ENABLED(PARTITION_UUIDS)
411 unsigned char *bin_uuid
;
413 #ifdef CONFIG_PARTITION_TYPE_GUID
415 unsigned char *bin_type_guid
;
418 for (i
= 0; i
< parts
; i
++) {
419 /* partition starting lba */
420 start
= partitions
[i
].start
;
421 if (start
&& (start
< offset
)) {
422 printf("Partition overlap\n");
426 gpt_e
[i
].starting_lba
= cpu_to_le64(start
);
427 offset
= start
+ partitions
[i
].size
;
429 gpt_e
[i
].starting_lba
= cpu_to_le64(offset
);
430 offset
+= partitions
[i
].size
;
432 if (offset
> (last_usable_lba
+ 1)) {
433 printf("Partitions layout exceds disk size\n");
436 /* partition ending lba */
437 if ((i
== parts
- 1) && (partitions
[i
].size
== 0))
438 /* extend the last partition to maximuim */
439 gpt_e
[i
].ending_lba
= gpt_h
->last_usable_lba
;
441 gpt_e
[i
].ending_lba
= cpu_to_le64(offset
- 1);
443 #ifdef CONFIG_PARTITION_TYPE_GUID
444 str_type_guid
= partitions
[i
].type_guid
;
445 bin_type_guid
= gpt_e
[i
].partition_type_guid
.b
;
446 if (strlen(str_type_guid
)) {
447 if (uuid_str_to_bin(str_type_guid
, bin_type_guid
,
448 UUID_STR_FORMAT_GUID
)) {
449 printf("Partition no. %d: invalid type guid: %s\n",
454 /* default partition type GUID */
455 memcpy(bin_type_guid
,
456 &PARTITION_BASIC_DATA_GUID
, 16);
459 /* partition type GUID */
460 memcpy(gpt_e
[i
].partition_type_guid
.b
,
461 &PARTITION_BASIC_DATA_GUID
, 16);
464 #if CONFIG_IS_ENABLED(PARTITION_UUIDS)
465 str_uuid
= partitions
[i
].uuid
;
466 bin_uuid
= gpt_e
[i
].unique_partition_guid
.b
;
468 if (uuid_str_to_bin(str_uuid
, bin_uuid
, UUID_STR_FORMAT_GUID
)) {
469 printf("Partition no. %d: invalid guid: %s\n",
475 /* partition attributes */
476 memset(&gpt_e
[i
].attributes
, 0,
477 sizeof(gpt_entry_attributes
));
479 if (partitions
[i
].bootable
)
480 gpt_e
[i
].attributes
.fields
.legacy_bios_bootable
= 1;
483 efiname_len
= sizeof(gpt_e
[i
].partition_name
)
484 / sizeof(efi_char16_t
);
485 dosname_len
= sizeof(partitions
[i
].name
);
487 memset(gpt_e
[i
].partition_name
, 0,
488 sizeof(gpt_e
[i
].partition_name
));
490 for (k
= 0; k
< min(dosname_len
, efiname_len
); k
++)
491 gpt_e
[i
].partition_name
[k
] =
492 (efi_char16_t
)(partitions
[i
].name
[k
]);
494 debug("%s: name: %s offset[%d]: 0x" LBAF
495 " size[%d]: 0x" LBAF
"\n",
496 __func__
, partitions
[i
].name
, i
,
497 offset
, i
, partitions
[i
].size
);
503 static uint32_t partition_entries_offset(struct blk_desc
*dev_desc
)
505 uint32_t offset_blks
= 2;
506 int __maybe_unused config_offset
;
508 #if defined(CONFIG_EFI_PARTITION_ENTRIES_OFF)
510 * Some architectures require their SPL loader at a fixed
511 * address within the first 16KB of the disk. To avoid an
512 * overlap with the partition entries of the EFI partition
513 * table, the first safe offset (in bytes, from the start of
514 * the disk) for the entries can be set in
515 * CONFIG_EFI_PARTITION_ENTRIES_OFF.
518 PAD_TO_BLOCKSIZE(CONFIG_EFI_PARTITION_ENTRIES_OFF
, dev_desc
);
521 #if defined(CONFIG_OF_CONTROL)
523 * Allow the offset of the first partition entires (in bytes
524 * from the start of the device) to be specified as a property
525 * of the device tree '/config' node.
527 config_offset
= fdtdec_get_config_int(gd
->fdt_blob
,
528 "u-boot,efi-partition-entries-offset",
530 if (config_offset
!= -EINVAL
)
531 offset_blks
= PAD_TO_BLOCKSIZE(config_offset
, dev_desc
);
534 debug("efi: partition entries offset (in blocks): %d\n", offset_blks
);
537 * The earliest LBA this can be at is LBA#2 (i.e. right behind
538 * the (protective) MBR and the GPT header.
546 int gpt_fill_header(struct blk_desc
*dev_desc
, gpt_header
*gpt_h
,
547 char *str_guid
, int parts_count
)
549 gpt_h
->signature
= cpu_to_le64(GPT_HEADER_SIGNATURE
);
550 gpt_h
->revision
= cpu_to_le32(GPT_HEADER_REVISION_V1
);
551 gpt_h
->header_size
= cpu_to_le32(sizeof(gpt_header
));
552 gpt_h
->my_lba
= cpu_to_le64(1);
553 gpt_h
->alternate_lba
= cpu_to_le64(dev_desc
->lba
- 1);
554 gpt_h
->last_usable_lba
= cpu_to_le64(dev_desc
->lba
- 34);
555 gpt_h
->partition_entry_lba
=
556 cpu_to_le64(partition_entries_offset(dev_desc
));
557 gpt_h
->first_usable_lba
=
558 cpu_to_le64(le64_to_cpu(gpt_h
->partition_entry_lba
) + 32);
559 gpt_h
->num_partition_entries
= cpu_to_le32(GPT_ENTRY_NUMBERS
);
560 gpt_h
->sizeof_partition_entry
= cpu_to_le32(sizeof(gpt_entry
));
561 gpt_h
->header_crc32
= 0;
562 gpt_h
->partition_entry_array_crc32
= 0;
564 if (uuid_str_to_bin(str_guid
, gpt_h
->disk_guid
.b
, UUID_STR_FORMAT_GUID
))
570 int gpt_restore(struct blk_desc
*dev_desc
, char *str_disk_guid
,
571 disk_partition_t
*partitions
, int parts_count
)
575 gpt_header
*gpt_h
= calloc(1, PAD_TO_BLOCKSIZE(sizeof(gpt_header
),
580 printf("%s: calloc failed!\n", __func__
);
584 gpt_e
= calloc(1, PAD_TO_BLOCKSIZE(GPT_ENTRY_NUMBERS
588 printf("%s: calloc failed!\n", __func__
);
593 /* Generate Primary GPT header (LBA1) */
594 ret
= gpt_fill_header(dev_desc
, gpt_h
, str_disk_guid
, parts_count
);
598 /* Generate partition entries */
599 ret
= gpt_fill_pte(gpt_h
, gpt_e
, partitions
, parts_count
);
603 /* Write GPT partition table */
604 ret
= write_gpt_table(dev_desc
, gpt_h
, gpt_e
);
612 static void gpt_convert_efi_name_to_char(char *s
, efi_char16_t
*es
, int n
)
614 char *ess
= (char *)es
;
619 for (i
= 0, j
= 0; j
< n
; i
+= 2, j
++) {
626 int gpt_verify_headers(struct blk_desc
*dev_desc
, gpt_header
*gpt_head
,
630 * This function validates AND
631 * fills in the GPT header and PTE
633 if (is_gpt_valid(dev_desc
,
634 GPT_PRIMARY_PARTITION_TABLE_LBA
,
635 gpt_head
, gpt_pte
) != 1) {
636 printf("%s: *** ERROR: Invalid GPT ***\n",
640 if (is_gpt_valid(dev_desc
, (dev_desc
->lba
- 1),
641 gpt_head
, gpt_pte
) != 1) {
642 printf("%s: *** ERROR: Invalid Backup GPT ***\n",
650 int gpt_verify_partitions(struct blk_desc
*dev_desc
,
651 disk_partition_t
*partitions
, int parts
,
652 gpt_header
*gpt_head
, gpt_entry
**gpt_pte
)
654 char efi_str
[PARTNAME_SZ
+ 1];
659 ret
= gpt_verify_headers(dev_desc
, gpt_head
, gpt_pte
);
665 for (i
= 0; i
< parts
; i
++) {
666 if (i
== gpt_head
->num_partition_entries
) {
667 error("More partitions than allowed!\n");
671 /* Check if GPT and ENV partition names match */
672 gpt_convert_efi_name_to_char(efi_str
, gpt_e
[i
].partition_name
,
675 debug("%s: part: %2d name - GPT: %16s, ENV: %16s ",
676 __func__
, i
, efi_str
, partitions
[i
].name
);
678 if (strncmp(efi_str
, (char *)partitions
[i
].name
,
679 sizeof(partitions
->name
))) {
680 error("Partition name: %s does not match %s!\n",
681 efi_str
, (char *)partitions
[i
].name
);
685 /* Check if GPT and ENV sizes match */
686 gpt_part_size
= le64_to_cpu(gpt_e
[i
].ending_lba
) -
687 le64_to_cpu(gpt_e
[i
].starting_lba
) + 1;
688 debug("size(LBA) - GPT: %8llu, ENV: %8llu ",
689 (unsigned long long)gpt_part_size
,
690 (unsigned long long)partitions
[i
].size
);
692 if (le64_to_cpu(gpt_part_size
) != partitions
[i
].size
) {
693 /* We do not check the extend partition size */
694 if ((i
== parts
- 1) && (partitions
[i
].size
== 0))
697 error("Partition %s size: %llu does not match %llu!\n",
698 efi_str
, (unsigned long long)gpt_part_size
,
699 (unsigned long long)partitions
[i
].size
);
704 * Start address is optional - check only if provided
705 * in '$partition' variable
707 if (!partitions
[i
].start
) {
712 /* Check if GPT and ENV start LBAs match */
713 debug("start LBA - GPT: %8llu, ENV: %8llu\n",
714 le64_to_cpu(gpt_e
[i
].starting_lba
),
715 (unsigned long long)partitions
[i
].start
);
717 if (le64_to_cpu(gpt_e
[i
].starting_lba
) != partitions
[i
].start
) {
718 error("Partition %s start: %llu does not match %llu!\n",
719 efi_str
, le64_to_cpu(gpt_e
[i
].starting_lba
),
720 (unsigned long long)partitions
[i
].start
);
728 int is_valid_gpt_buf(struct blk_desc
*dev_desc
, void *buf
)
733 /* determine start of GPT Header in the buffer */
734 gpt_h
= buf
+ (GPT_PRIMARY_PARTITION_TABLE_LBA
*
736 if (validate_gpt_header(gpt_h
, GPT_PRIMARY_PARTITION_TABLE_LBA
,
740 /* determine start of GPT Entries in the buffer */
741 gpt_e
= buf
+ (le64_to_cpu(gpt_h
->partition_entry_lba
) *
743 if (validate_gpt_entries(gpt_h
, gpt_e
))
749 int write_mbr_and_gpt_partitions(struct blk_desc
*dev_desc
, void *buf
)
757 if (is_valid_gpt_buf(dev_desc
, buf
))
760 /* determine start of GPT Header in the buffer */
761 gpt_h
= buf
+ (GPT_PRIMARY_PARTITION_TABLE_LBA
*
764 /* determine start of GPT Entries in the buffer */
765 gpt_e
= buf
+ (le64_to_cpu(gpt_h
->partition_entry_lba
) *
767 gpt_e_blk_cnt
= BLOCK_CNT((le32_to_cpu(gpt_h
->num_partition_entries
) *
768 le32_to_cpu(gpt_h
->sizeof_partition_entry
)),
772 lba
= 0; /* MBR is always at 0 */
773 cnt
= 1; /* MBR (1 block) */
774 if (blk_dwrite(dev_desc
, lba
, cnt
, buf
) != cnt
) {
775 printf("%s: failed writing '%s' (%d blks at 0x" LBAF
")\n",
776 __func__
, "MBR", cnt
, lba
);
780 /* write Primary GPT */
781 lba
= GPT_PRIMARY_PARTITION_TABLE_LBA
;
782 cnt
= 1; /* GPT Header (1 block) */
783 if (blk_dwrite(dev_desc
, lba
, cnt
, gpt_h
) != cnt
) {
784 printf("%s: failed writing '%s' (%d blks at 0x" LBAF
")\n",
785 __func__
, "Primary GPT Header", cnt
, lba
);
789 lba
= le64_to_cpu(gpt_h
->partition_entry_lba
);
791 if (blk_dwrite(dev_desc
, lba
, cnt
, gpt_e
) != cnt
) {
792 printf("%s: failed writing '%s' (%d blks at 0x" LBAF
")\n",
793 __func__
, "Primary GPT Entries", cnt
, lba
);
797 prepare_backup_gpt_header(gpt_h
);
799 /* write Backup GPT */
800 lba
= le64_to_cpu(gpt_h
->partition_entry_lba
);
802 if (blk_dwrite(dev_desc
, lba
, cnt
, gpt_e
) != cnt
) {
803 printf("%s: failed writing '%s' (%d blks at 0x" LBAF
")\n",
804 __func__
, "Backup GPT Entries", cnt
, lba
);
808 lba
= le64_to_cpu(gpt_h
->my_lba
);
809 cnt
= 1; /* GPT Header (1 block) */
810 if (blk_dwrite(dev_desc
, lba
, cnt
, gpt_h
) != cnt
) {
811 printf("%s: failed writing '%s' (%d blks at 0x" LBAF
")\n",
812 __func__
, "Backup GPT Header", cnt
, lba
);
824 * pmbr_part_valid(): Check for EFI partition signature
826 * Returns: 1 if EFI GPT partition type is found.
828 static int pmbr_part_valid(struct partition
*part
)
830 if (part
->sys_ind
== EFI_PMBR_OSTYPE_EFI_GPT
&&
831 get_unaligned_le32(&part
->start_sect
) == 1UL) {
839 * is_pmbr_valid(): test Protective MBR for validity
841 * Returns: 1 if PMBR is valid, 0 otherwise.
842 * Validity depends on two things:
843 * 1) MSDOS signature is in the last two bytes of the MBR
844 * 2) One partition of type 0xEE is found, checked by pmbr_part_valid()
846 static int is_pmbr_valid(legacy_mbr
* mbr
)
850 if (!mbr
|| le16_to_cpu(mbr
->signature
) != MSDOS_MBR_SIGNATURE
)
853 for (i
= 0; i
< 4; i
++) {
854 if (pmbr_part_valid(&mbr
->partition_record
[i
])) {
862 * is_gpt_valid() - tests one GPT header and PTEs for validity
864 * lba is the logical block address of the GPT header to test
865 * gpt is a GPT header ptr, filled on return.
866 * ptes is a PTEs ptr, filled on return.
868 * Description: returns 1 if valid, 0 on error.
869 * If valid, returns pointers to PTEs.
871 static int is_gpt_valid(struct blk_desc
*dev_desc
, u64 lba
,
872 gpt_header
*pgpt_head
, gpt_entry
**pgpt_pte
)
874 if (!dev_desc
|| !pgpt_head
) {
875 printf("%s: Invalid Argument(s)\n", __func__
);
879 /* Read GPT Header from device */
880 if (blk_dread(dev_desc
, (lbaint_t
)lba
, 1, pgpt_head
) != 1) {
881 printf("*** ERROR: Can't read GPT header ***\n");
885 if (validate_gpt_header(pgpt_head
, (lbaint_t
)lba
, dev_desc
->lba
))
888 /* Read and allocate Partition Table Entries */
889 *pgpt_pte
= alloc_read_gpt_entries(dev_desc
, pgpt_head
);
890 if (*pgpt_pte
== NULL
) {
891 printf("GPT: Failed to allocate memory for PTE\n");
895 if (validate_gpt_entries(pgpt_head
, *pgpt_pte
)) {
900 /* We're done, all's well */
905 * alloc_read_gpt_entries(): reads partition entries from disk
909 * Description: Returns ptes on success, NULL on error.
910 * Allocates space for PTEs based on information found in @gpt.
911 * Notes: remember to free pte when you're done!
913 static gpt_entry
*alloc_read_gpt_entries(struct blk_desc
*dev_desc
,
914 gpt_header
*pgpt_head
)
916 size_t count
= 0, blk_cnt
;
918 gpt_entry
*pte
= NULL
;
920 if (!dev_desc
|| !pgpt_head
) {
921 printf("%s: Invalid Argument(s)\n", __func__
);
925 count
= le32_to_cpu(pgpt_head
->num_partition_entries
) *
926 le32_to_cpu(pgpt_head
->sizeof_partition_entry
);
928 debug("%s: count = %u * %u = %lu\n", __func__
,
929 (u32
) le32_to_cpu(pgpt_head
->num_partition_entries
),
930 (u32
) le32_to_cpu(pgpt_head
->sizeof_partition_entry
),
933 /* Allocate memory for PTE, remember to FREE */
935 pte
= memalign(ARCH_DMA_MINALIGN
,
936 PAD_TO_BLOCKSIZE(count
, dev_desc
));
939 if (count
== 0 || pte
== NULL
) {
940 printf("%s: ERROR: Can't allocate %#lX bytes for GPT Entries\n",
941 __func__
, (ulong
)count
);
945 /* Read GPT Entries from device */
946 blk
= le64_to_cpu(pgpt_head
->partition_entry_lba
);
947 blk_cnt
= BLOCK_CNT(count
, dev_desc
);
948 if (blk_dread(dev_desc
, blk
, (lbaint_t
)blk_cnt
, pte
) != blk_cnt
) {
949 printf("*** ERROR: Can't read GPT Entries ***\n");
957 * is_pte_valid(): validates a single Partition Table Entry
958 * @gpt_entry - Pointer to a single Partition Table Entry
960 * Description: returns 1 if valid, 0 on error.
962 static int is_pte_valid(gpt_entry
* pte
)
964 efi_guid_t unused_guid
;
967 printf("%s: Invalid Argument(s)\n", __func__
);
971 /* Only one validation for now:
972 * The GUID Partition Type != Unused Entry (ALL-ZERO)
974 memset(unused_guid
.b
, 0, sizeof(unused_guid
.b
));
976 if (memcmp(pte
->partition_type_guid
.b
, unused_guid
.b
,
977 sizeof(unused_guid
.b
)) == 0) {
979 debug("%s: Found an unused PTE GUID at 0x%08X\n", __func__
,
980 (unsigned int)(uintptr_t)pte
);
989 * Add an 'a_' prefix so it comes before 'dos' in the linker list. We need to
990 * check EFI first, since a DOS partition is often used as a 'protective MBR'
993 U_BOOT_PART_TYPE(a_efi
) = {
995 .part_type
= PART_TYPE_EFI
,
996 .max_entries
= GPT_ENTRY_NUMBERS
,
997 .get_info
= part_get_info_ptr(part_get_info_efi
),
998 .print
= part_print_ptr(part_print_efi
),
999 .test
= part_test_efi
,