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)
48 * efi_crc32() - EFI version of crc32 function
49 * @buf: buffer to calculate crc32 of
50 * @len - length of buf
52 * Description: Returns EFI-style CRC32 value for @buf
54 static inline u32 efi_crc32(const void *buf, u32 len)
56 return crc32(0, buf, len);
60 * Private function prototypes
63 static int pmbr_part_valid(struct partition *part);
64 static int is_pmbr_valid(legacy_mbr * mbr);
66 static int is_gpt_valid(block_dev_desc_t * dev_desc, unsigned long long lba,
67 gpt_header * pgpt_head, gpt_entry ** pgpt_pte);
69 static gpt_entry *alloc_read_gpt_entries(block_dev_desc_t * dev_desc,
70 gpt_header * pgpt_head);
72 static int is_pte_valid(gpt_entry * pte);
74 static char *print_efiname(gpt_entry *pte)
76 static char name[PARTNAME_SZ + 1];
78 for (i = 0; i < PARTNAME_SZ; i++) {
80 c = pte->partition_name[i] & 0xff;
81 c = (c && !isprint(c)) ? '.' : c;
84 name[PARTNAME_SZ] = 0;
88 static void uuid_string(unsigned char *uuid, char *str)
90 static const u8 le[16] = {3, 2, 1, 0, 5, 4, 7, 6, 8, 9, 10, 11,
94 for (i = 0; i < 16; i++) {
95 sprintf(str, "%02x", uuid[le[i]]);
108 static efi_guid_t system_guid = PARTITION_SYSTEM_GUID;
110 static inline int is_bootable(gpt_entry *p)
112 return p->attributes.fields.legacy_bios_bootable ||
113 !memcmp(&(p->partition_type_guid), &system_guid,
118 * Public Functions (include/part.h)
121 void print_part_efi(block_dev_desc_t * dev_desc)
123 ALLOC_CACHE_ALIGN_BUFFER(gpt_header, gpt_head, 1);
124 gpt_entry *gpt_pte = NULL;
129 printf("%s: Invalid Argument(s)\n", __func__);
132 /* This function validates AND fills in the GPT header and PTE */
133 if (is_gpt_valid(dev_desc, GPT_PRIMARY_PARTITION_TABLE_LBA,
134 gpt_head, &gpt_pte) != 1) {
135 printf("%s: *** ERROR: Invalid GPT ***\n", __func__);
139 debug("%s: gpt-entry at %p\n", __func__, gpt_pte);
141 printf("Part\tStart LBA\tEnd LBA\t\tName\n");
142 printf("\tAttributes\n");
143 printf("\tType UUID\n");
144 printf("\tPartition UUID\n");
146 for (i = 0; i < le32_to_cpu(gpt_head->num_partition_entries); i++) {
147 /* Stop at the first non valid PTE */
148 if (!is_pte_valid(&gpt_pte[i]))
151 printf("%3d\t0x%08llx\t0x%08llx\t\"%s\"\n", (i + 1),
152 le64_to_cpu(gpt_pte[i].starting_lba),
153 le64_to_cpu(gpt_pte[i].ending_lba),
154 print_efiname(&gpt_pte[i]));
155 printf("\tattrs:\t0x%016llx\n", gpt_pte[i].attributes.raw);
156 uuid_string(gpt_pte[i].partition_type_guid.b, uuid);
157 printf("\ttype:\t%s\n", uuid);
158 uuid_string(gpt_pte[i].unique_partition_guid.b, uuid);
159 printf("\tuuid:\t%s\n", uuid);
162 /* Remember to free pte */
167 int get_partition_info_efi(block_dev_desc_t * dev_desc, int part,
168 disk_partition_t * info)
170 ALLOC_CACHE_ALIGN_BUFFER(gpt_header, gpt_head, 1);
171 gpt_entry *gpt_pte = NULL;
173 /* "part" argument must be at least 1 */
174 if (!dev_desc || !info || part < 1) {
175 printf("%s: Invalid Argument(s)\n", __func__);
179 /* This function validates AND fills in the GPT header and PTE */
180 if (is_gpt_valid(dev_desc, GPT_PRIMARY_PARTITION_TABLE_LBA,
181 gpt_head, &gpt_pte) != 1) {
182 printf("%s: *** ERROR: Invalid GPT ***\n", __func__);
186 if (part > le32_to_cpu(gpt_head->num_partition_entries) ||
187 !is_pte_valid(&gpt_pte[part - 1])) {
188 printf("%s: *** ERROR: Invalid partition number %d ***\n",
193 /* The ulong casting limits the maximum disk size to 2 TB */
194 info->start = (u64)le64_to_cpu(gpt_pte[part - 1].starting_lba);
195 /* The ending LBA is inclusive, to calculate size, add 1 to it */
196 info->size = ((u64)le64_to_cpu(gpt_pte[part - 1].ending_lba) + 1)
198 info->blksz = GPT_BLOCK_SIZE;
200 sprintf((char *)info->name, "%s",
201 print_efiname(&gpt_pte[part - 1]));
202 sprintf((char *)info->type, "U-Boot");
203 info->bootable = is_bootable(&gpt_pte[part - 1]);
204 #ifdef CONFIG_PARTITION_UUIDS
205 uuid_string(gpt_pte[part - 1].unique_partition_guid.b, info->uuid);
208 debug("%s: start 0x%lX, size 0x%lX, name %s", __func__,
209 info->start, info->size, info->name);
211 /* Remember to free pte */
216 int test_part_efi(block_dev_desc_t * dev_desc)
218 ALLOC_CACHE_ALIGN_BUFFER(legacy_mbr, legacymbr, 1);
220 /* Read legacy MBR from block 0 and validate it */
221 if ((dev_desc->block_read(dev_desc->dev, 0, 1, (ulong *)legacymbr) != 1)
222 || (is_pmbr_valid(legacymbr) != 1)) {
232 * pmbr_part_valid(): Check for EFI partition signature
234 * Returns: 1 if EFI GPT partition type is found.
236 static int pmbr_part_valid(struct partition *part)
238 if (part->sys_ind == EFI_PMBR_OSTYPE_EFI_GPT &&
239 le32_to_cpu(part->start_sect) == 1UL) {
247 * is_pmbr_valid(): test Protective MBR for validity
249 * Returns: 1 if PMBR is valid, 0 otherwise.
250 * Validity depends on two things:
251 * 1) MSDOS signature is in the last two bytes of the MBR
252 * 2) One partition of type 0xEE is found, checked by pmbr_part_valid()
254 static int is_pmbr_valid(legacy_mbr * mbr)
258 if (!mbr || le16_to_cpu(mbr->signature) != MSDOS_MBR_SIGNATURE)
261 for (i = 0; i < 4; i++) {
262 if (pmbr_part_valid(&mbr->partition_record[i])) {
270 * is_gpt_valid() - tests one GPT header and PTEs for validity
272 * lba is the logical block address of the GPT header to test
273 * gpt is a GPT header ptr, filled on return.
274 * ptes is a PTEs ptr, filled on return.
276 * Description: returns 1 if valid, 0 on error.
277 * If valid, returns pointers to PTEs.
279 static int is_gpt_valid(block_dev_desc_t * dev_desc, unsigned long long lba,
280 gpt_header * pgpt_head, gpt_entry ** pgpt_pte)
282 u32 crc32_backup = 0;
284 unsigned long long lastlba;
286 if (!dev_desc || !pgpt_head) {
287 printf("%s: Invalid Argument(s)\n", __func__);
291 /* Read GPT Header from device */
292 if (dev_desc->block_read(dev_desc->dev, lba, 1, pgpt_head) != 1) {
293 printf("*** ERROR: Can't read GPT header ***\n");
297 /* Check the GPT header signature */
298 if (le64_to_cpu(pgpt_head->signature) != GPT_HEADER_SIGNATURE) {
299 printf("GUID Partition Table Header signature is wrong:"
300 "0x%llX != 0x%llX\n",
301 le64_to_cpu(pgpt_head->signature),
302 GPT_HEADER_SIGNATURE);
306 /* Check the GUID Partition Table CRC */
307 memcpy(&crc32_backup, &pgpt_head->header_crc32, sizeof(crc32_backup));
308 memset(&pgpt_head->header_crc32, 0, sizeof(pgpt_head->header_crc32));
310 calc_crc32 = efi_crc32((const unsigned char *)pgpt_head,
311 le32_to_cpu(pgpt_head->header_size));
313 memcpy(&pgpt_head->header_crc32, &crc32_backup, sizeof(crc32_backup));
315 if (calc_crc32 != le32_to_cpu(crc32_backup)) {
316 printf("GUID Partition Table Header CRC is wrong:"
318 le32_to_cpu(crc32_backup), calc_crc32);
322 /* Check that the my_lba entry points to the LBA that contains the GPT */
323 if (le64_to_cpu(pgpt_head->my_lba) != lba) {
324 printf("GPT: my_lba incorrect: %llX != %llX\n",
325 le64_to_cpu(pgpt_head->my_lba),
330 /* Check the first_usable_lba and last_usable_lba are within the disk. */
331 lastlba = (unsigned long long)dev_desc->lba;
332 if (le64_to_cpu(pgpt_head->first_usable_lba) > lastlba) {
333 printf("GPT: first_usable_lba incorrect: %llX > %llX\n",
334 le64_to_cpu(pgpt_head->first_usable_lba), lastlba);
337 if (le64_to_cpu(pgpt_head->last_usable_lba) > lastlba) {
338 printf("GPT: last_usable_lba incorrect: %llX > %llX\n",
339 (u64) le64_to_cpu(pgpt_head->last_usable_lba), lastlba);
343 debug("GPT: first_usable_lba: %llX last_usable_lba %llX last lba %llX\n",
344 le64_to_cpu(pgpt_head->first_usable_lba),
345 le64_to_cpu(pgpt_head->last_usable_lba), lastlba);
347 /* Read and allocate Partition Table Entries */
348 *pgpt_pte = alloc_read_gpt_entries(dev_desc, pgpt_head);
349 if (*pgpt_pte == NULL) {
350 printf("GPT: Failed to allocate memory for PTE\n");
354 /* Check the GUID Partition Table Entry Array CRC */
355 calc_crc32 = efi_crc32((const unsigned char *)*pgpt_pte,
356 le32_to_cpu(pgpt_head->num_partition_entries) *
357 le32_to_cpu(pgpt_head->sizeof_partition_entry));
359 if (calc_crc32 != le32_to_cpu(pgpt_head->partition_entry_array_crc32)) {
360 printf("GUID Partition Table Entry Array CRC is wrong:"
362 le32_to_cpu(pgpt_head->partition_entry_array_crc32),
369 /* We're done, all's well */
374 * alloc_read_gpt_entries(): reads partition entries from disk
378 * Description: Returns ptes on success, NULL on error.
379 * Allocates space for PTEs based on information found in @gpt.
380 * Notes: remember to free pte when you're done!
382 static gpt_entry *alloc_read_gpt_entries(block_dev_desc_t * dev_desc,
383 gpt_header * pgpt_head)
386 gpt_entry *pte = NULL;
388 if (!dev_desc || !pgpt_head) {
389 printf("%s: Invalid Argument(s)\n", __func__);
393 count = le32_to_cpu(pgpt_head->num_partition_entries) *
394 le32_to_cpu(pgpt_head->sizeof_partition_entry);
396 debug("%s: count = %u * %u = %zu\n", __func__,
397 (u32) le32_to_cpu(pgpt_head->num_partition_entries),
398 (u32) le32_to_cpu(pgpt_head->sizeof_partition_entry), count);
400 /* Allocate memory for PTE, remember to FREE */
402 pte = memalign(ARCH_DMA_MINALIGN, count);
405 if (count == 0 || pte == NULL) {
406 printf("%s: ERROR: Can't allocate 0x%zX "
407 "bytes for GPT Entries\n",
412 /* Read GPT Entries from device */
413 if (dev_desc->block_read (dev_desc->dev,
414 le64_to_cpu(pgpt_head->partition_entry_lba),
415 (lbaint_t) (count / GPT_BLOCK_SIZE), pte)
416 != (count / GPT_BLOCK_SIZE)) {
418 printf("*** ERROR: Can't read GPT Entries ***\n");
426 * is_pte_valid(): validates a single Partition Table Entry
427 * @gpt_entry - Pointer to a single Partition Table Entry
429 * Description: returns 1 if valid, 0 on error.
431 static int is_pte_valid(gpt_entry * pte)
433 efi_guid_t unused_guid;
436 printf("%s: Invalid Argument(s)\n", __func__);
440 /* Only one validation for now:
441 * The GUID Partition Type != Unused Entry (ALL-ZERO)
443 memset(unused_guid.b, 0, sizeof(unused_guid.b));
445 if (memcmp(pte->partition_type_guid.b, unused_guid.b,
446 sizeof(unused_guid.b)) == 0) {
448 debug("%s: Found an unused PTE GUID at 0x%08X\n", __func__,
449 (unsigned int)(uintptr_t)pte);