diff options
| author | Govindraj Raja <govindraj.raja@arm.com> | 2023-10-16 09:30:16 -0500 |
|---|---|---|
| committer | Govindraj Raja <govindraj.raja@arm.com> | 2023-10-27 08:31:54 -0500 |
| commit | 3e6d245772ccb4b43f1ba6cd9d1bb8abe86a516c (patch) | |
| tree | a61e327b13b66831d9fc10a60cb51542db768e4d | |
| parent | 1051606c3df3b5a0ebd4e4dad1e5e4a57e2f4d69 (diff) | |
feat(arm): add IO policy to use backup gpt header
Add a IO block spec to use GPT backup header if primary fails.
Currently we use only the primary gpt header which is in the second
block(LBA-1) after the MBR block(LBA-0) so we restrict IO access to
primary gpt header and its entries.
But we plan to use backup GPT which is the last block of the
partition (LBA-n) in case our primary GPT header fails verification
or is corrupted.
Offset and length of the block spec will be updated runtime from
partition driver after parsing MBR data.
Change-Id: Id1d49841d6f4cbcc3248af19faf2fbd8e24a8ba1
Signed-off-by: Govindraj Raja <govindraj.raja@arm.com>
| -rw-r--r-- | plat/arm/common/fconf/arm_fconf_io.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/plat/arm/common/fconf/arm_fconf_io.c b/plat/arm/common/fconf/arm_fconf_io.c index 27acc3a64..8fe8c3372 100644 --- a/plat/arm/common/fconf/arm_fconf_io.c +++ b/plat/arm/common/fconf/arm_fconf_io.c @@ -50,6 +50,18 @@ static const io_block_spec_t gpt_spec = { .length = PLAT_PARTITION_BLOCK_SIZE * (PLAT_PARTITION_MAX_ENTRIES / 4 + 2), }; + +/* + * length will be assigned at runtime based on MBR header data. + * Backup GPT Header is present in Last LBA-1 and its entries + * are last 32 blocks starts at LBA-33, On runtime update these + * before device usage. Update offset to beginning LBA-33 and + * length to LBA-33. + */ +static io_block_spec_t bkup_gpt_spec = { + .offset = PLAT_ARM_FLASH_IMAGE_BASE, + .length = 0, +}; #endif /* ARM_GPT_SUPPORT */ const io_uuid_spec_t arm_uuid_spec[MAX_NUMBER_IDS] = { @@ -107,6 +119,11 @@ struct plat_io_policy policies[MAX_NUMBER_IDS] = { (uintptr_t)&gpt_spec, open_memmap }, + [BKUP_GPT_IMAGE_ID] = { + &memmap_dev_handle, + (uintptr_t)&bkup_gpt_spec, + open_memmap + }, #endif /* ARM_GPT_SUPPORT */ #if PSA_FWU_SUPPORT [FWU_METADATA_IMAGE_ID] = { |