| /* |
| * Copyright (C) 2008 RuggedCom, Inc. |
| * Richard Retanubun <RichardRetanubun@RuggedCom.com> |
| * |
| * See file CREDITS for list of people who contributed to this |
| * project. |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public License as |
| * published by the Free Software Foundation; either version 2 of |
| * the License, or (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 59 Temple Place, Suite 330, Boston, |
| * MA 02111-1307 USA |
| */ |
| |
| /* |
| * Problems with CONFIG_SYS_64BIT_LBA: |
| * |
| * struct disk_partition.start in include/part.h is sized as ulong. |
| * When CONFIG_SYS_64BIT_LBA is activated, lbaint_t changes from ulong to uint64_t. |
| * For now, it is cast back to ulong at assignment. |
| * |
| * This limits the maximum size of addressable storage to < 2 Terra Bytes |
| */ |
| #include <common.h> |
| #include <command.h> |
| #include <ide.h> |
| #include <malloc.h> |
| #include "part_efi.h" |
| #include <linux/ctype.h> |
| |
| #if defined(CONFIG_CMD_IDE) || \ |
| defined(CONFIG_CMD_MG_DISK) || \ |
| defined(CONFIG_CMD_SATA) || \ |
| defined(CONFIG_CMD_SCSI) || \ |
| defined(CONFIG_CMD_USB) || \ |
| defined(CONFIG_MMC) || \ |
| defined(CONFIG_SYSTEMACE) |
| |
| /* Convert char[2] in little endian format to the host format integer |
| */ |
| static inline unsigned short le16_to_int(unsigned char *le16) |
| { |
| return ((le16[1] << 8) + le16[0]); |
| } |
| |
| /* Convert char[4] in little endian format to the host format integer |
| */ |
| static inline unsigned long le32_to_int(unsigned char *le32) |
| { |
| return ((le32[3] << 24) + (le32[2] << 16) + (le32[1] << 8) + le32[0]); |
| } |
| |
| /* Convert char[8] in little endian format to the host format integer |
| */ |
| static inline unsigned long long le64_to_int(unsigned char *le64) |
| { |
| return (((unsigned long long)le64[7] << 56) + |
| ((unsigned long long)le64[6] << 48) + |
| ((unsigned long long)le64[5] << 40) + |
| ((unsigned long long)le64[4] << 32) + |
| ((unsigned long long)le64[3] << 24) + |
| ((unsigned long long)le64[2] << 16) + |
| ((unsigned long long)le64[1] << 8) + |
| (unsigned long long)le64[0]); |
| } |
| |
| /** |
| * efi_crc32() - EFI version of crc32 function |
| * @buf: buffer to calculate crc32 of |
| * @len - length of buf |
| * |
| * Description: Returns EFI-style CRC32 value for @buf |
| */ |
| static inline unsigned long efi_crc32(const void *buf, unsigned long len) |
| { |
| return crc32(0, buf, len); |
| } |
| |
| /* |
| * Private function prototypes |
| */ |
| |
| static int pmbr_part_valid(struct partition *part); |
| static int is_pmbr_valid(legacy_mbr * mbr); |
| |
| static int is_gpt_valid(block_dev_desc_t * dev_desc, unsigned long long lba, |
| gpt_header * pgpt_head, gpt_entry ** pgpt_pte); |
| |
| static gpt_entry *alloc_read_gpt_entries(block_dev_desc_t * dev_desc, |
| gpt_header * pgpt_head); |
| |
| static int is_pte_valid(gpt_entry * pte); |
| |
| static char *print_efiname(gpt_entry *pte) |
| { |
| static char name[PARTNAME_SZ + 1]; |
| int i; |
| for (i = 0; i < PARTNAME_SZ; i++) { |
| u8 c; |
| c = pte->partition_name[i] & 0xff; |
| c = (c && !isprint(c)) ? '.' : c; |
| name[i] = c; |
| } |
| name[PARTNAME_SZ] = 0; |
| return name; |
| } |
| |
| /* |
| * Public Functions (include/part.h) |
| */ |
| |
| void print_part_efi(block_dev_desc_t * dev_desc) |
| { |
| ALLOC_CACHE_ALIGN_BUFFER(gpt_header, gpt_head, 1); |
| gpt_entry *gpt_pte = NULL; |
| int i = 0; |
| |
| if (!dev_desc) { |
| printf("%s: Invalid Argument(s)\n", __func__); |
| return; |
| } |
| /* This function validates AND fills in the GPT header and PTE */ |
| if (is_gpt_valid(dev_desc, GPT_PRIMARY_PARTITION_TABLE_LBA, |
| gpt_head, &gpt_pte) != 1) { |
| printf("%s: *** ERROR: Invalid GPT ***\n", __func__); |
| return; |
| } |
| |
| debug("%s: gpt-entry at %p\n", __func__, gpt_pte); |
| |
| printf("Part\tName\t\t\tStart LBA\tEnd LBA\n"); |
| for (i = 0; i < le32_to_int(gpt_head->num_partition_entries); i++) { |
| |
| if (is_pte_valid(&gpt_pte[i])) { |
| printf("%3d\t%-18s\t0x%08llX\t0x%08llX\n", (i + 1), |
| print_efiname(&gpt_pte[i]), |
| le64_to_int(gpt_pte[i].starting_lba), |
| le64_to_int(gpt_pte[i].ending_lba)); |
| } else { |
| break; /* Stop at the first non valid PTE */ |
| } |
| } |
| |
| /* Remember to free pte */ |
| free(gpt_pte); |
| return; |
| } |
| |
| int get_partition_info_efi(block_dev_desc_t * dev_desc, int part, |
| disk_partition_t * info) |
| { |
| ALLOC_CACHE_ALIGN_BUFFER(gpt_header, gpt_head, 1); |
| gpt_entry *gpt_pte = NULL; |
| |
| /* "part" argument must be at least 1 */ |
| if (!dev_desc || !info || part < 1) { |
| printf("%s: Invalid Argument(s)\n", __func__); |
| return -1; |
| } |
| |
| /* This function validates AND fills in the GPT header and PTE */ |
| if (is_gpt_valid(dev_desc, GPT_PRIMARY_PARTITION_TABLE_LBA, |
| gpt_head, &gpt_pte) != 1) { |
| printf("%s: *** ERROR: Invalid GPT ***\n", __func__); |
| return -1; |
| } |
| |
| /* The ulong casting limits the maximum disk size to 2 TB */ |
| info->start = (ulong) le64_to_int(gpt_pte[part - 1].starting_lba); |
| /* The ending LBA is inclusive, to calculate size, add 1 to it */ |
| info->size = ((ulong)le64_to_int(gpt_pte[part - 1].ending_lba) + 1) |
| - info->start; |
| info->blksz = GPT_BLOCK_SIZE; |
| |
| sprintf((char *)info->name, "%s", |
| print_efiname(&gpt_pte[part - 1])); |
| sprintf((char *)info->type, "U-Boot"); |
| |
| debug("%s: start 0x%lX, size 0x%lX, name %s", __func__, |
| info->start, info->size, info->name); |
| |
| /* Remember to free pte */ |
| free(gpt_pte); |
| return 0; |
| } |
| |
| int test_part_efi(block_dev_desc_t * dev_desc) |
| { |
| ALLOC_CACHE_ALIGN_BUFFER(legacy_mbr, legacymbr, 1); |
| |
| /* Read legacy MBR from block 0 and validate it */ |
| if ((dev_desc->block_read(dev_desc->dev, 0, 1, (ulong *)legacymbr) != 1) |
| || (is_pmbr_valid(legacymbr) != 1)) { |
| return -1; |
| } |
| return 0; |
| } |
| |
| /* |
| * Private functions |
| */ |
| /* |
| * pmbr_part_valid(): Check for EFI partition signature |
| * |
| * Returns: 1 if EFI GPT partition type is found. |
| */ |
| static int pmbr_part_valid(struct partition *part) |
| { |
| if (part->sys_ind == EFI_PMBR_OSTYPE_EFI_GPT && |
| le32_to_int(part->start_sect) == 1UL) { |
| return 1; |
| } |
| |
| return 0; |
| } |
| |
| /* |
| * is_pmbr_valid(): test Protective MBR for validity |
| * |
| * Returns: 1 if PMBR is valid, 0 otherwise. |
| * Validity depends on two things: |
| * 1) MSDOS signature is in the last two bytes of the MBR |
| * 2) One partition of type 0xEE is found, checked by pmbr_part_valid() |
| */ |
| static int is_pmbr_valid(legacy_mbr * mbr) |
| { |
| int i = 0; |
| |
| if (!mbr || le16_to_int(mbr->signature) != MSDOS_MBR_SIGNATURE) { |
| return 0; |
| } |
| |
| for (i = 0; i < 4; i++) { |
| if (pmbr_part_valid(&mbr->partition_record[i])) { |
| return 1; |
| } |
| } |
| return 0; |
| } |
| |
| /** |
| * is_gpt_valid() - tests one GPT header and PTEs for validity |
| * |
| * lba is the logical block address of the GPT header to test |
| * gpt is a GPT header ptr, filled on return. |
| * ptes is a PTEs ptr, filled on return. |
| * |
| * Description: returns 1 if valid, 0 on error. |
| * If valid, returns pointers to PTEs. |
| */ |
| static int is_gpt_valid(block_dev_desc_t * dev_desc, unsigned long long lba, |
| gpt_header * pgpt_head, gpt_entry ** pgpt_pte) |
| { |
| unsigned char crc32_backup[4] = { 0 }; |
| unsigned long calc_crc32; |
| unsigned long long lastlba; |
| |
| if (!dev_desc || !pgpt_head) { |
| printf("%s: Invalid Argument(s)\n", __func__); |
| return 0; |
| } |
| |
| /* Read GPT Header from device */ |
| if (dev_desc->block_read(dev_desc->dev, lba, 1, pgpt_head) != 1) { |
| printf("*** ERROR: Can't read GPT header ***\n"); |
| return 0; |
| } |
| |
| /* Check the GPT header signature */ |
| if (le64_to_int(pgpt_head->signature) != GPT_HEADER_SIGNATURE) { |
| printf("GUID Partition Table Header signature is wrong:" |
| "0x%llX != 0x%llX\n", |
| (unsigned long long)le64_to_int(pgpt_head->signature), |
| (unsigned long long)GPT_HEADER_SIGNATURE); |
| return 0; |
| } |
| |
| /* Check the GUID Partition Table CRC */ |
| memcpy(crc32_backup, pgpt_head->header_crc32, sizeof(crc32_backup)); |
| memset(pgpt_head->header_crc32, 0, sizeof(pgpt_head->header_crc32)); |
| |
| calc_crc32 = efi_crc32((const unsigned char *)pgpt_head, |
| le32_to_int(pgpt_head->header_size)); |
| |
| memcpy(pgpt_head->header_crc32, crc32_backup, sizeof(crc32_backup)); |
| |
| if (calc_crc32 != le32_to_int(crc32_backup)) { |
| printf("GUID Partition Table Header CRC is wrong:" |
| "0x%08lX != 0x%08lX\n", |
| le32_to_int(crc32_backup), calc_crc32); |
| return 0; |
| } |
| |
| /* Check that the my_lba entry points to the LBA that contains the GPT */ |
| if (le64_to_int(pgpt_head->my_lba) != lba) { |
| printf("GPT: my_lba incorrect: %llX != %llX\n", |
| (unsigned long long)le64_to_int(pgpt_head->my_lba), |
| (unsigned long long)lba); |
| return 0; |
| } |
| |
| /* Check the first_usable_lba and last_usable_lba are within the disk. */ |
| lastlba = (unsigned long long)dev_desc->lba; |
| if (le64_to_int(pgpt_head->first_usable_lba) > lastlba) { |
| printf("GPT: first_usable_lba incorrect: %llX > %llX\n", |
| le64_to_int(pgpt_head->first_usable_lba), lastlba); |
| return 0; |
| } |
| if (le64_to_int(pgpt_head->last_usable_lba) > lastlba) { |
| printf("GPT: last_usable_lba incorrect: %llX > %llX\n", |
| le64_to_int(pgpt_head->last_usable_lba), lastlba); |
| return 0; |
| } |
| |
| debug("GPT: first_usable_lba: %llX last_usable_lba %llX last lba %llX\n", |
| le64_to_int(pgpt_head->first_usable_lba), |
| le64_to_int(pgpt_head->last_usable_lba), lastlba); |
| |
| /* Read and allocate Partition Table Entries */ |
| *pgpt_pte = alloc_read_gpt_entries(dev_desc, pgpt_head); |
| if (*pgpt_pte == NULL) { |
| printf("GPT: Failed to allocate memory for PTE\n"); |
| return 0; |
| } |
| |
| /* Check the GUID Partition Table Entry Array CRC */ |
| calc_crc32 = efi_crc32((const unsigned char *)*pgpt_pte, |
| le32_to_int(pgpt_head->num_partition_entries) * |
| le32_to_int(pgpt_head->sizeof_partition_entry)); |
| |
| if (calc_crc32 != le32_to_int(pgpt_head->partition_entry_array_crc32)) { |
| printf("GUID Partition Table Entry Array CRC is wrong:" |
| "0x%08lX != 0x%08lX\n", |
| le32_to_int(pgpt_head->partition_entry_array_crc32), |
| calc_crc32); |
| |
| free(*pgpt_pte); |
| return 0; |
| } |
| |
| /* We're done, all's well */ |
| return 1; |
| } |
| |
| /** |
| * alloc_read_gpt_entries(): reads partition entries from disk |
| * @dev_desc |
| * @gpt - GPT header |
| * |
| * Description: Returns ptes on success, NULL on error. |
| * Allocates space for PTEs based on information found in @gpt. |
| * Notes: remember to free pte when you're done! |
| */ |
| static gpt_entry *alloc_read_gpt_entries(block_dev_desc_t * dev_desc, |
| gpt_header * pgpt_head) |
| { |
| size_t count = 0; |
| gpt_entry *pte = NULL; |
| |
| if (!dev_desc || !pgpt_head) { |
| printf("%s: Invalid Argument(s)\n", __func__); |
| return NULL; |
| } |
| |
| count = le32_to_int(pgpt_head->num_partition_entries) * |
| le32_to_int(pgpt_head->sizeof_partition_entry); |
| |
| debug("%s: count = %lu * %lu = %zu\n", __func__, |
| le32_to_int(pgpt_head->num_partition_entries), |
| le32_to_int(pgpt_head->sizeof_partition_entry), count); |
| |
| /* Allocate memory for PTE, remember to FREE */ |
| if (count != 0) { |
| pte = memalign(ARCH_DMA_MINALIGN, count); |
| } |
| |
| if (count == 0 || pte == NULL) { |
| printf("%s: ERROR: Can't allocate 0x%zX " |
| "bytes for GPT Entries\n", |
| __func__, count); |
| return NULL; |
| } |
| |
| /* Read GPT Entries from device */ |
| if (dev_desc->block_read (dev_desc->dev, |
| (unsigned long)le64_to_int(pgpt_head->partition_entry_lba), |
| (lbaint_t) (count / GPT_BLOCK_SIZE), pte) |
| != (count / GPT_BLOCK_SIZE)) { |
| |
| printf("*** ERROR: Can't read GPT Entries ***\n"); |
| free(pte); |
| return NULL; |
| } |
| return pte; |
| } |
| |
| /** |
| * is_pte_valid(): validates a single Partition Table Entry |
| * @gpt_entry - Pointer to a single Partition Table Entry |
| * |
| * Description: returns 1 if valid, 0 on error. |
| */ |
| static int is_pte_valid(gpt_entry * pte) |
| { |
| efi_guid_t unused_guid; |
| |
| if (!pte) { |
| printf("%s: Invalid Argument(s)\n", __func__); |
| return 0; |
| } |
| |
| /* Only one validation for now: |
| * The GUID Partition Type != Unused Entry (ALL-ZERO) |
| */ |
| memset(unused_guid.b, 0, sizeof(unused_guid.b)); |
| |
| if (memcmp(pte->partition_type_guid.b, unused_guid.b, |
| sizeof(unused_guid.b)) == 0) { |
| |
| debug("%s: Found an unused PTE GUID at 0x%08X\n", __func__, |
| (unsigned int)(uintptr_t)pte); |
| |
| return 0; |
| } else { |
| return 1; |
| } |
| } |
| #endif |