diff options
| author | Steve Rae <srae@broadcom.com> | 2014-05-05 13:00:08 -0700 |
|---|---|---|
| committer | Tom Rini <trini@ti.com> | 2014-05-12 15:20:05 -0400 |
| commit | ae95fad5af3793ae804b4390727e0f431e5514d7 (patch) | |
| tree | 65de51deeb3eef975b9f593f1cb9f36c1d3a1dbb /disk/part_efi.c | |
| parent | fa39ffe5d61bd7f34b2ff579f5f6bb8f92a6b9b1 (diff) | |
disk: part_efi: add support for the Backup GPT
Check the Backup GPT table if the Primary GPT table is invalid.
Renamed "Secondary GPT" to "Backup GPT" as per:
UEFI Specification (Version 2.3.1, Errata A)
Signed-off-by: Steve Rae <srae@broadcom.com>
Diffstat (limited to 'disk/part_efi.c')
| -rw-r--r-- | disk/part_efi.c | 22 |
1 files changed, 19 insertions, 3 deletions
diff --git a/disk/part_efi.c b/disk/part_efi.c index 216a2920c27..c74b7b91705 100644 --- a/disk/part_efi.c +++ b/disk/part_efi.c @@ -93,7 +93,15 @@ void print_part_efi(block_dev_desc_t * dev_desc) if (is_gpt_valid(dev_desc, GPT_PRIMARY_PARTITION_TABLE_LBA, gpt_head, &gpt_pte) != 1) { printf("%s: *** ERROR: Invalid GPT ***\n", __func__); - return; + if (is_gpt_valid(dev_desc, (dev_desc->lba - 1), + gpt_head, &gpt_pte) != 1) { + printf("%s: *** ERROR: Invalid Backup GPT ***\n", + __func__); + return; + } else { + printf("%s: *** Using Backup GPT ***\n", + __func__); + } } debug("%s: gpt-entry at %p\n", __func__, gpt_pte); @@ -142,7 +150,15 @@ int get_partition_info_efi(block_dev_desc_t * dev_desc, int part, 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; + if (is_gpt_valid(dev_desc, (dev_desc->lba - 1), + gpt_head, &gpt_pte) != 1) { + printf("%s: *** ERROR: Invalid Backup GPT ***\n", + __func__); + return -1; + } else { + printf("%s: *** Using Backup GPT ***\n", + __func__); + } } if (part > le32_to_cpu(gpt_head->num_partition_entries) || @@ -252,7 +268,7 @@ int write_gpt_table(block_dev_desc_t *dev_desc, != pte_blk_cnt) goto err; - /* recalculate the values for the Second GPT Header */ + /* recalculate the values for the Backup GPT Header */ val = le64_to_cpu(gpt_h->my_lba); gpt_h->my_lba = gpt_h->alternate_lba; gpt_h->alternate_lba = cpu_to_le64(val); |