2 * Copyright (C) 2008 RuggedCom, Inc.
3 * Richard Retanubun <RichardRetanubun@RuggedCom.com>
5 * See file CREDITS for list of people who contributed to this
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License as
10 * published by the Free Software Foundation; either version 2 of
11 * the License, or (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
25 * Problems with CONFIG_SYS_64BIT_LBA:
27 * struct disk_partition.start in include/part.h is sized as ulong.
28 * When CONFIG_SYS_64BIT_LBA is activated, lbaint_t changes from ulong to uint64_t.
29 * For now, it is cast back to ulong at assignment.
31 * This limits the maximum size of addressable storage to < 2 Terra Bytes
39 #if (defined(CONFIG_CMD_IDE) || \
40 defined(CONFIG_CMD_SATA) || \
41 defined(CONFIG_CMD_SCSI) || \
42 defined(CONFIG_CMD_USB) || \
43 defined(CONFIG_MMC) || \
44 defined(CONFIG_SYSTEMACE) ) && defined(CONFIG_EFI_PARTITION)
46 /* Convert char[2] in little endian format to the host format integer
48 static inline unsigned short le16_to_int(unsigned char *le16
)
50 return ((le16
[1] << 8) + le16
[0]);
53 /* Convert char[4] in little endian format to the host format integer
55 static inline unsigned long le32_to_int(unsigned char *le32
)
57 return ((le32
[3] << 24) + (le32
[2] << 16) + (le32
[1] << 8) + le32
[0]);
60 /* Convert char[8] in little endian format to the host format integer
62 static inline unsigned long long le64_to_int(unsigned char *le64
)
64 return (((unsigned long long)le64
[7] << 56) +
65 ((unsigned long long)le64
[6] << 48) +
66 ((unsigned long long)le64
[5] << 40) +
67 ((unsigned long long)le64
[4] << 32) +
68 ((unsigned long long)le64
[3] << 24) +
69 ((unsigned long long)le64
[2] << 16) +
70 ((unsigned long long)le64
[1] << 8) +
71 (unsigned long long)le64
[0]);
75 * efi_crc32() - EFI version of crc32 function
76 * @buf: buffer to calculate crc32 of
77 * @len - length of buf
79 * Description: Returns EFI-style CRC32 value for @buf
81 static inline unsigned long efi_crc32(const void *buf
, unsigned long len
)
83 return crc32(0, buf
, len
);
87 * Private function prototypes
90 static int pmbr_part_valid(struct partition
*part
);
91 static int is_pmbr_valid(legacy_mbr
* mbr
);
93 static int is_gpt_valid(block_dev_desc_t
* dev_desc
, unsigned long long lba
,
94 gpt_header
* pgpt_head
, gpt_entry
** pgpt_pte
);
96 static gpt_entry
*alloc_read_gpt_entries(block_dev_desc_t
* dev_desc
,
97 gpt_header
* pgpt_head
);
99 static int is_pte_valid(gpt_entry
* pte
);
102 * Public Functions (include/part.h)
105 void print_part_efi(block_dev_desc_t
* dev_desc
)
108 gpt_entry
**pgpt_pte
= NULL
;
112 printf("%s: Invalid Argument(s)\n", __FUNCTION__
);
115 /* This function validates AND fills in the GPT header and PTE */
116 if (is_gpt_valid(dev_desc
, GPT_PRIMARY_PARTITION_TABLE_LBA
,
117 &(gpt_head
), pgpt_pte
) != 1) {
118 printf("%s: *** ERROR: Invalid GPT ***\n", __FUNCTION__
);
122 debug("%s: gpt-entry at 0x%08X\n", __FUNCTION__
, (unsigned int)*pgpt_pte
);
124 printf("Part Start LBA End LBA\n");
125 for (i
= 0; i
< le32_to_int(gpt_head
.num_partition_entries
); i
++) {
127 if (is_pte_valid(&(*pgpt_pte
)[i
])) {
128 printf("%s%d 0x%llX 0x%llX\n", GPT_ENTRY_NAME
,
130 le64_to_int((*pgpt_pte
)[i
].starting_lba
),
131 le64_to_int((*pgpt_pte
)[i
].ending_lba
));
133 break; /* Stop at the first non valid PTE */
137 /* Remember to free pte */
138 if (*pgpt_pte
!= NULL
) {
139 debug("%s: Freeing pgpt_pte\n", __FUNCTION__
);
145 int get_partition_info_efi(block_dev_desc_t
* dev_desc
, int part
,
146 disk_partition_t
* info
)
149 gpt_entry
**pgpt_pte
= NULL
;
151 /* "part" argument must be at least 1 */
152 if (!dev_desc
|| !info
|| part
< 1) {
153 printf("%s: Invalid Argument(s)\n", __FUNCTION__
);
157 /* This function validates AND fills in the GPT header and PTE */
158 if (is_gpt_valid(dev_desc
, GPT_PRIMARY_PARTITION_TABLE_LBA
,
159 &(gpt_head
), pgpt_pte
) != 1) {
160 printf("%s: *** ERROR: Invalid GPT ***\n", __FUNCTION__
);
164 /* The ulong casting limits the maximum disk size to 2 TB */
165 info
->start
= (ulong
) le64_to_int((*pgpt_pte
)[part
- 1].starting_lba
);
166 /* The ending LBA is inclusive, to calculate size, add 1 to it */
167 info
->size
= ((ulong
)le64_to_int((*pgpt_pte
)[part
- 1].ending_lba
) + 1)
169 info
->blksz
= GPT_BLOCK_SIZE
;
171 sprintf((char *)info
->name
, "%s%d\n", GPT_ENTRY_NAME
, part
);
172 sprintf((char *)info
->type
, "U-Boot");
174 debug("%s: start 0x%lX, size 0x%lX, name %s", __FUNCTION__
,
175 info
->start
, info
->size
, info
->name
);
177 /* Remember to free pte */
178 if (*pgpt_pte
!= NULL
) {
179 debug("%s: Freeing pgpt_pte\n", __FUNCTION__
);
185 int test_part_efi(block_dev_desc_t
* dev_desc
)
187 legacy_mbr legacymbr
;
189 /* Read legacy MBR from block 0 and validate it */
190 if ((dev_desc
->block_read(dev_desc
->dev
, 0, 1, (ulong
*) & legacymbr
) != 1)
191 || (is_pmbr_valid(&legacymbr
) != 1)) {
201 * pmbr_part_valid(): Check for EFI partition signature
203 * Returns: 1 if EFI GPT partition type is found.
205 static int pmbr_part_valid(struct partition
*part
)
207 if (part
->sys_ind
== EFI_PMBR_OSTYPE_EFI_GPT
&&
208 le32_to_int(part
->start_sect
) == 1UL) {
216 * is_pmbr_valid(): test Protective MBR for validity
218 * Returns: 1 if PMBR is valid, 0 otherwise.
219 * Validity depends on two things:
220 * 1) MSDOS signature is in the last two bytes of the MBR
221 * 2) One partition of type 0xEE is found, checked by pmbr_part_valid()
223 static int is_pmbr_valid(legacy_mbr
* mbr
)
227 if (!mbr
|| le16_to_int(mbr
->signature
) != MSDOS_MBR_SIGNATURE
) {
231 for (i
= 0; i
< 4; i
++) {
232 if (pmbr_part_valid(&mbr
->partition_record
[i
])) {
240 * is_gpt_valid() - tests one GPT header and PTEs for validity
242 * lba is the logical block address of the GPT header to test
243 * gpt is a GPT header ptr, filled on return.
244 * ptes is a PTEs ptr, filled on return.
246 * Description: returns 1 if valid, 0 on error.
247 * If valid, returns pointers to PTEs.
249 static int is_gpt_valid(block_dev_desc_t
* dev_desc
, unsigned long long lba
,
250 gpt_header
* pgpt_head
, gpt_entry
** pgpt_pte
)
252 unsigned char crc32_backup
[4] = { 0 };
253 unsigned long calc_crc32
;
254 unsigned long long lastlba
;
256 if (!dev_desc
|| !pgpt_head
) {
257 printf("%s: Invalid Argument(s)\n", __FUNCTION__
);
261 /* Read GPT Header from device */
262 if (dev_desc
->block_read(dev_desc
->dev
, lba
, 1, pgpt_head
) != 1) {
263 printf("*** ERROR: Can't read GPT header ***\n");
267 /* Check the GPT header signature */
268 if (le64_to_int(pgpt_head
->signature
) != GPT_HEADER_SIGNATURE
) {
269 printf("GUID Partition Table Header signature is wrong:"
270 "0x%llX != 0x%llX\n",
271 (unsigned long long)le64_to_int(pgpt_head
->signature
),
272 (unsigned long long)GPT_HEADER_SIGNATURE
);
276 /* Check the GUID Partition Table CRC */
277 memcpy(crc32_backup
, pgpt_head
->header_crc32
, sizeof(crc32_backup
));
278 memset(pgpt_head
->header_crc32
, 0, sizeof(pgpt_head
->header_crc32
));
280 calc_crc32
= efi_crc32((const unsigned char *)pgpt_head
,
281 le32_to_int(pgpt_head
->header_size
));
283 memcpy(pgpt_head
->header_crc32
, crc32_backup
, sizeof(crc32_backup
));
285 if (calc_crc32
!= le32_to_int(crc32_backup
)) {
286 printf("GUID Partition Table Header CRC is wrong:"
287 "0x%08lX != 0x%08lX\n",
288 le32_to_int(crc32_backup
), calc_crc32
);
292 /* Check that the my_lba entry points to the LBA that contains the GPT */
293 if (le64_to_int(pgpt_head
->my_lba
) != lba
) {
294 printf("GPT: my_lba incorrect: %llX != %llX\n",
295 (unsigned long long)le64_to_int(pgpt_head
->my_lba
),
296 (unsigned long long)lba
);
300 /* Check the first_usable_lba and last_usable_lba are within the disk. */
301 lastlba
= (unsigned long long)dev_desc
->lba
;
302 if (le64_to_int(pgpt_head
->first_usable_lba
) > lastlba
) {
303 printf("GPT: first_usable_lba incorrect: %llX > %llX\n",
304 le64_to_int(pgpt_head
->first_usable_lba
), lastlba
);
307 if (le64_to_int(pgpt_head
->last_usable_lba
) > lastlba
) {
308 printf("GPT: last_usable_lba incorrect: %llX > %llX\n",
309 le64_to_int(pgpt_head
->last_usable_lba
), lastlba
);
313 debug("GPT: first_usable_lba: %llX last_usable_lba %llX last lba %llX\n",
314 le64_to_int(pgpt_head
->first_usable_lba
),
315 le64_to_int(pgpt_head
->last_usable_lba
), lastlba
);
317 /* Read and allocate Partition Table Entries */
318 *pgpt_pte
= alloc_read_gpt_entries(dev_desc
, pgpt_head
);
319 if (*pgpt_pte
== NULL
) {
320 printf("GPT: Failed to allocate memory for PTE\n");
324 /* Check the GUID Partition Table Entry Array CRC */
325 calc_crc32
= efi_crc32((const unsigned char *)*pgpt_pte
,
326 le32_to_int(pgpt_head
->num_partition_entries
) *
327 le32_to_int(pgpt_head
->sizeof_partition_entry
));
329 if (calc_crc32
!= le32_to_int(pgpt_head
->partition_entry_array_crc32
)) {
330 printf("GUID Partition Table Entry Array CRC is wrong:"
331 "0x%08lX != 0x%08lX\n",
332 le32_to_int(pgpt_head
->partition_entry_array_crc32
),
335 if (*pgpt_pte
!= NULL
) {
341 /* We're done, all's well */
346 * alloc_read_gpt_entries(): reads partition entries from disk
350 * Description: Returns ptes on success, NULL on error.
351 * Allocates space for PTEs based on information found in @gpt.
352 * Notes: remember to free pte when you're done!
354 static gpt_entry
*alloc_read_gpt_entries(block_dev_desc_t
* dev_desc
,
355 gpt_header
* pgpt_head
)
358 gpt_entry
*pte
= NULL
;
360 if (!dev_desc
|| !pgpt_head
) {
361 printf("%s: Invalid Argument(s)\n", __FUNCTION__
);
365 count
= le32_to_int(pgpt_head
->num_partition_entries
) *
366 le32_to_int(pgpt_head
->sizeof_partition_entry
);
368 debug("%s: count = %lu * %lu = %u\n", __FUNCTION__
,
369 le32_to_int(pgpt_head
->num_partition_entries
),
370 le32_to_int(pgpt_head
->sizeof_partition_entry
), count
);
372 /* Allocate memory for PTE, remember to FREE */
377 if (count
== 0 || pte
== NULL
) {
378 printf("%s: ERROR: Can't allocate 0x%X bytes for GPT Entries\n",
379 __FUNCTION__
, count
);
383 /* Read GPT Entries from device */
384 if (dev_desc
->block_read (dev_desc
->dev
,
385 (unsigned long)le64_to_int(pgpt_head
->partition_entry_lba
),
386 (lbaint_t
) (count
/ GPT_BLOCK_SIZE
), pte
)
387 != (count
/ GPT_BLOCK_SIZE
)) {
389 printf("*** ERROR: Can't read GPT Entries ***\n");
397 * is_pte_valid(): validates a single Partition Table Entry
398 * @gpt_entry - Pointer to a single Partition Table Entry
400 * Description: returns 1 if valid, 0 on error.
402 static int is_pte_valid(gpt_entry
* pte
)
404 efi_guid_t unused_guid
;
407 printf("%s: Invalid Argument(s)\n", __FUNCTION__
);
411 /* Only one validation for now:
412 * The GUID Partition Type != Unused Entry (ALL-ZERO)
414 memset(unused_guid
.b
, 0, sizeof(unused_guid
.b
));
416 if (memcmp(pte
->partition_type_guid
.b
, unused_guid
.b
,
417 sizeof(unused_guid
.b
)) == 0) {
419 debug("%s: Found an unused PTE GUID at 0x%08X\n", __FUNCTION__
,