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
38 #include <linux/ctype.h>
40 #if defined(CONFIG_CMD_IDE) || \
41 defined(CONFIG_CMD_SATA) || \
42 defined(CONFIG_CMD_SCSI) || \
43 defined(CONFIG_CMD_USB) || \
44 defined(CONFIG_MMC) || \
45 defined(CONFIG_SYSTEMACE)
47 /* Convert char[2] in little endian format to the host format integer
49 static inline unsigned short le16_to_int(unsigned char *le16
)
51 return ((le16
[1] << 8) + le16
[0]);
54 /* Convert char[4] in little endian format to the host format integer
56 static inline unsigned long le32_to_int(unsigned char *le32
)
58 return ((le32
[3] << 24) + (le32
[2] << 16) + (le32
[1] << 8) + le32
[0]);
61 /* Convert char[8] in little endian format to the host format integer
63 static inline unsigned long long le64_to_int(unsigned char *le64
)
65 return (((unsigned long long)le64
[7] << 56) +
66 ((unsigned long long)le64
[6] << 48) +
67 ((unsigned long long)le64
[5] << 40) +
68 ((unsigned long long)le64
[4] << 32) +
69 ((unsigned long long)le64
[3] << 24) +
70 ((unsigned long long)le64
[2] << 16) +
71 ((unsigned long long)le64
[1] << 8) +
72 (unsigned long long)le64
[0]);
76 * efi_crc32() - EFI version of crc32 function
77 * @buf: buffer to calculate crc32 of
78 * @len - length of buf
80 * Description: Returns EFI-style CRC32 value for @buf
82 static inline unsigned long efi_crc32(const void *buf
, unsigned long len
)
84 return crc32(0, buf
, len
);
88 * Private function prototypes
91 static int pmbr_part_valid(struct partition
*part
);
92 static int is_pmbr_valid(legacy_mbr
* mbr
);
94 static int is_gpt_valid(block_dev_desc_t
* dev_desc
, unsigned long long lba
,
95 gpt_header
* pgpt_head
, gpt_entry
** pgpt_pte
);
97 static gpt_entry
*alloc_read_gpt_entries(block_dev_desc_t
* dev_desc
,
98 gpt_header
* pgpt_head
);
100 static int is_pte_valid(gpt_entry
* pte
);
102 static char *print_efiname(gpt_entry
*pte
)
104 static char name
[PARTNAME_SZ
+ 1];
106 for (i
= 0; i
< PARTNAME_SZ
; i
++) {
108 c
= pte
->partition_name
[i
] & 0xff;
109 c
= (c
&& !isprint(c
)) ? '.' : c
;
112 name
[PARTNAME_SZ
] = 0;
117 * Public Functions (include/part.h)
120 void print_part_efi(block_dev_desc_t
* dev_desc
)
122 ALLOC_CACHE_ALIGN_BUFFER(gpt_header
, gpt_head
, 1);
123 gpt_entry
*gpt_pte
= NULL
;
127 printf("%s: Invalid Argument(s)\n", __func__
);
130 /* This function validates AND fills in the GPT header and PTE */
131 if (is_gpt_valid(dev_desc
, GPT_PRIMARY_PARTITION_TABLE_LBA
,
132 gpt_head
, &gpt_pte
) != 1) {
133 printf("%s: *** ERROR: Invalid GPT ***\n", __func__
);
137 debug("%s: gpt-entry at %p\n", __func__
, gpt_pte
);
139 printf("Part\tName\t\t\tStart LBA\tEnd LBA\n");
140 for (i
= 0; i
< le32_to_int(gpt_head
->num_partition_entries
); i
++) {
141 /* Stop at the first non valid PTE */
142 if (!is_pte_valid(&gpt_pte
[i
]))
145 printf("%3d\t%-18s\t0x%08llX\t0x%08llX\n", (i
+ 1),
146 print_efiname(&gpt_pte
[i
]),
147 le64_to_int(gpt_pte
[i
].starting_lba
),
148 le64_to_int(gpt_pte
[i
].ending_lba
));
151 /* Remember to free pte */
156 #ifdef CONFIG_PARTITION_UUIDS
157 static void uuid_string(unsigned char *uuid
, char *str
)
159 static const u8 le
[16] = {3, 2, 1, 0, 5, 4, 7, 6, 8, 9, 10, 11,
163 for (i
= 0; i
< 16; i
++) {
164 sprintf(str
, "%02x", uuid
[le
[i
]]);
178 int get_partition_info_efi(block_dev_desc_t
* dev_desc
, int part
,
179 disk_partition_t
* info
)
181 ALLOC_CACHE_ALIGN_BUFFER(gpt_header
, gpt_head
, 1);
182 gpt_entry
*gpt_pte
= NULL
;
184 /* "part" argument must be at least 1 */
185 if (!dev_desc
|| !info
|| part
< 1) {
186 printf("%s: Invalid Argument(s)\n", __func__
);
190 /* This function validates AND fills in the GPT header and PTE */
191 if (is_gpt_valid(dev_desc
, GPT_PRIMARY_PARTITION_TABLE_LBA
,
192 gpt_head
, &gpt_pte
) != 1) {
193 printf("%s: *** ERROR: Invalid GPT ***\n", __func__
);
197 if (part
> le32_to_int(gpt_head
->num_partition_entries
) ||
198 !is_pte_valid(&gpt_pte
[part
- 1])) {
199 printf("%s: *** ERROR: Invalid partition number %d ***\n",
204 /* The ulong casting limits the maximum disk size to 2 TB */
205 info
->start
= (ulong
) le64_to_int(gpt_pte
[part
- 1].starting_lba
);
206 /* The ending LBA is inclusive, to calculate size, add 1 to it */
207 info
->size
= ((ulong
)le64_to_int(gpt_pte
[part
- 1].ending_lba
) + 1)
209 info
->blksz
= GPT_BLOCK_SIZE
;
211 sprintf((char *)info
->name
, "%s",
212 print_efiname(&gpt_pte
[part
- 1]));
213 sprintf((char *)info
->type
, "U-Boot");
214 #ifdef CONFIG_PARTITION_UUIDS
215 uuid_string(gpt_pte
[part
- 1].unique_partition_guid
.b
, info
->uuid
);
218 debug("%s: start 0x%lX, size 0x%lX, name %s", __func__
,
219 info
->start
, info
->size
, info
->name
);
221 /* Remember to free pte */
226 int test_part_efi(block_dev_desc_t
* dev_desc
)
228 ALLOC_CACHE_ALIGN_BUFFER(legacy_mbr
, legacymbr
, 1);
230 /* Read legacy MBR from block 0 and validate it */
231 if ((dev_desc
->block_read(dev_desc
->dev
, 0, 1, (ulong
*)legacymbr
) != 1)
232 || (is_pmbr_valid(legacymbr
) != 1)) {
242 * pmbr_part_valid(): Check for EFI partition signature
244 * Returns: 1 if EFI GPT partition type is found.
246 static int pmbr_part_valid(struct partition
*part
)
248 if (part
->sys_ind
== EFI_PMBR_OSTYPE_EFI_GPT
&&
249 le32_to_int(part
->start_sect
) == 1UL) {
257 * is_pmbr_valid(): test Protective MBR for validity
259 * Returns: 1 if PMBR is valid, 0 otherwise.
260 * Validity depends on two things:
261 * 1) MSDOS signature is in the last two bytes of the MBR
262 * 2) One partition of type 0xEE is found, checked by pmbr_part_valid()
264 static int is_pmbr_valid(legacy_mbr
* mbr
)
268 if (!mbr
|| le16_to_int(mbr
->signature
) != MSDOS_MBR_SIGNATURE
) {
272 for (i
= 0; i
< 4; i
++) {
273 if (pmbr_part_valid(&mbr
->partition_record
[i
])) {
281 * is_gpt_valid() - tests one GPT header and PTEs for validity
283 * lba is the logical block address of the GPT header to test
284 * gpt is a GPT header ptr, filled on return.
285 * ptes is a PTEs ptr, filled on return.
287 * Description: returns 1 if valid, 0 on error.
288 * If valid, returns pointers to PTEs.
290 static int is_gpt_valid(block_dev_desc_t
* dev_desc
, unsigned long long lba
,
291 gpt_header
* pgpt_head
, gpt_entry
** pgpt_pte
)
293 unsigned char crc32_backup
[4] = { 0 };
294 unsigned long calc_crc32
;
295 unsigned long long lastlba
;
297 if (!dev_desc
|| !pgpt_head
) {
298 printf("%s: Invalid Argument(s)\n", __func__
);
302 /* Read GPT Header from device */
303 if (dev_desc
->block_read(dev_desc
->dev
, lba
, 1, pgpt_head
) != 1) {
304 printf("*** ERROR: Can't read GPT header ***\n");
308 /* Check the GPT header signature */
309 if (le64_to_int(pgpt_head
->signature
) != GPT_HEADER_SIGNATURE
) {
310 printf("GUID Partition Table Header signature is wrong:"
311 "0x%llX != 0x%llX\n",
312 (unsigned long long)le64_to_int(pgpt_head
->signature
),
313 (unsigned long long)GPT_HEADER_SIGNATURE
);
317 /* Check the GUID Partition Table CRC */
318 memcpy(crc32_backup
, pgpt_head
->header_crc32
, sizeof(crc32_backup
));
319 memset(pgpt_head
->header_crc32
, 0, sizeof(pgpt_head
->header_crc32
));
321 calc_crc32
= efi_crc32((const unsigned char *)pgpt_head
,
322 le32_to_int(pgpt_head
->header_size
));
324 memcpy(pgpt_head
->header_crc32
, crc32_backup
, sizeof(crc32_backup
));
326 if (calc_crc32
!= le32_to_int(crc32_backup
)) {
327 printf("GUID Partition Table Header CRC is wrong:"
328 "0x%08lX != 0x%08lX\n",
329 le32_to_int(crc32_backup
), calc_crc32
);
333 /* Check that the my_lba entry points to the LBA that contains the GPT */
334 if (le64_to_int(pgpt_head
->my_lba
) != lba
) {
335 printf("GPT: my_lba incorrect: %llX != %llX\n",
336 (unsigned long long)le64_to_int(pgpt_head
->my_lba
),
337 (unsigned long long)lba
);
341 /* Check the first_usable_lba and last_usable_lba are within the disk. */
342 lastlba
= (unsigned long long)dev_desc
->lba
;
343 if (le64_to_int(pgpt_head
->first_usable_lba
) > lastlba
) {
344 printf("GPT: first_usable_lba incorrect: %llX > %llX\n",
345 le64_to_int(pgpt_head
->first_usable_lba
), lastlba
);
348 if (le64_to_int(pgpt_head
->last_usable_lba
) > lastlba
) {
349 printf("GPT: last_usable_lba incorrect: %llX > %llX\n",
350 le64_to_int(pgpt_head
->last_usable_lba
), lastlba
);
354 debug("GPT: first_usable_lba: %llX last_usable_lba %llX last lba %llX\n",
355 le64_to_int(pgpt_head
->first_usable_lba
),
356 le64_to_int(pgpt_head
->last_usable_lba
), lastlba
);
358 /* Read and allocate Partition Table Entries */
359 *pgpt_pte
= alloc_read_gpt_entries(dev_desc
, pgpt_head
);
360 if (*pgpt_pte
== NULL
) {
361 printf("GPT: Failed to allocate memory for PTE\n");
365 /* Check the GUID Partition Table Entry Array CRC */
366 calc_crc32
= efi_crc32((const unsigned char *)*pgpt_pte
,
367 le32_to_int(pgpt_head
->num_partition_entries
) *
368 le32_to_int(pgpt_head
->sizeof_partition_entry
));
370 if (calc_crc32
!= le32_to_int(pgpt_head
->partition_entry_array_crc32
)) {
371 printf("GUID Partition Table Entry Array CRC is wrong:"
372 "0x%08lX != 0x%08lX\n",
373 le32_to_int(pgpt_head
->partition_entry_array_crc32
),
380 /* We're done, all's well */
385 * alloc_read_gpt_entries(): reads partition entries from disk
389 * Description: Returns ptes on success, NULL on error.
390 * Allocates space for PTEs based on information found in @gpt.
391 * Notes: remember to free pte when you're done!
393 static gpt_entry
*alloc_read_gpt_entries(block_dev_desc_t
* dev_desc
,
394 gpt_header
* pgpt_head
)
397 gpt_entry
*pte
= NULL
;
399 if (!dev_desc
|| !pgpt_head
) {
400 printf("%s: Invalid Argument(s)\n", __func__
);
404 count
= le32_to_int(pgpt_head
->num_partition_entries
) *
405 le32_to_int(pgpt_head
->sizeof_partition_entry
);
407 debug("%s: count = %lu * %lu = %u\n", __func__
,
408 le32_to_int(pgpt_head
->num_partition_entries
),
409 le32_to_int(pgpt_head
->sizeof_partition_entry
), count
);
411 /* Allocate memory for PTE, remember to FREE */
413 pte
= memalign(ARCH_DMA_MINALIGN
, count
);
416 if (count
== 0 || pte
== NULL
) {
417 printf("%s: ERROR: Can't allocate 0x%X bytes for GPT Entries\n",
422 /* Read GPT Entries from device */
423 if (dev_desc
->block_read (dev_desc
->dev
,
424 (unsigned long)le64_to_int(pgpt_head
->partition_entry_lba
),
425 (lbaint_t
) (count
/ GPT_BLOCK_SIZE
), pte
)
426 != (count
/ GPT_BLOCK_SIZE
)) {
428 printf("*** ERROR: Can't read GPT Entries ***\n");
436 * is_pte_valid(): validates a single Partition Table Entry
437 * @gpt_entry - Pointer to a single Partition Table Entry
439 * Description: returns 1 if valid, 0 on error.
441 static int is_pte_valid(gpt_entry
* pte
)
443 efi_guid_t unused_guid
;
446 printf("%s: Invalid Argument(s)\n", __func__
);
450 /* Only one validation for now:
451 * The GUID Partition Type != Unused Entry (ALL-ZERO)
453 memset(unused_guid
.b
, 0, sizeof(unused_guid
.b
));
455 if (memcmp(pte
->partition_type_guid
.b
, unused_guid
.b
,
456 sizeof(unused_guid
.b
)) == 0) {
458 debug("%s: Found an unused PTE GUID at 0x%08X\n", __func__
,