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feat(stm32mp1): add support for reading the metadata partition 

Add support for reading the FWU metadata partition. The metadata
partition stores information on the current active bank along with
information on all the FWU updatable images on the platform. This
information is then used to identify the image to be booted.

Signed-off-by: Sughosh Ganu <sughosh.ganu@linaro.org>
Change-Id: I66bc5ac718c21a49c504e698b5b1f5c4daed2d08
This commit is contained in:
Sughosh Ganu 2021-12-01 16:46:34 +05:30
parent 8dd755314f
commit 0ca180f641
3 changed files with 71 additions and 0 deletions
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47
plat/st/common/bl2_io_storage.c
View File

@ -548,4 +548,51 @@ void plat_fwu_set_images_source(const struct fwu_metadata *metadata)
image_spec->length = entry->length;
}
}
static int plat_set_image_source(unsigned int image_id,
uintptr_t *handle,
uintptr_t *image_spec,
const char *part_name)
{
struct plat_io_policy *policy;
io_block_spec_t *spec;
const partition_entry_t *entry = get_partition_entry(part_name);
if (entry == NULL) {
ERROR("Unable to find the %s partition\n", part_name);
return -ENOENT;
}
policy = &policies[image_id];
spec = (io_block_spec_t *)policy->image_spec;
spec->offset = entry->start;
spec->length = entry->length;
*image_spec = policy->image_spec;
*handle = *policy->dev_handle;
return 0;
}
int plat_fwu_set_metadata_image_source(unsigned int image_id,
uintptr_t *handle,
uintptr_t *image_spec)
{
char *part_name;
assert((image_id == FWU_METADATA_IMAGE_ID) ||
(image_id == BKUP_FWU_METADATA_IMAGE_ID));
partition_init(GPT_IMAGE_ID);
if (image_id == FWU_METADATA_IMAGE_ID) {
part_name = METADATA_PART_1;
} else {
part_name = METADATA_PART_2;
}
return plat_set_image_source(image_id, handle, image_spec,
part_name);
}
#endif /* (STM32MP_SDMMC || STM32MP_EMMC) && PSA_FWU_SUPPORT */

21
plat/st/common/stm32mp_fconf_io.c
View File

@ -27,6 +27,13 @@ static io_block_spec_t gpt_block_spec = {
};
#endif
#if (STM32MP_SDMMC || STM32MP_EMMC) && PSA_FWU_SUPPORT
io_block_spec_t metadata_block_spec = {
.offset = 0, /* To be filled at runtime */
.length = 0, /* To be filled at runtime */
};
#endif /* (STM32MP_SDMMC || STM32MP_EMMC) && PSA_FWU_SUPPORT */
/* By default, STM32 platforms load images from the FIP */
struct plat_io_policy policies[MAX_NUMBER_IDS] = {
[FIP_IMAGE_ID] = {
@ -43,6 +50,20 @@ struct plat_io_policy policies[MAX_NUMBER_IDS] = {
.check = open_storage
},
#endif
#if (STM32MP_SDMMC || STM32MP_EMMC) && PSA_FWU_SUPPORT
[FWU_METADATA_IMAGE_ID] = {
.dev_handle = &storage_dev_handle,
.image_spec = (uintptr_t)&metadata_block_spec,
.img_type_guid = NULL_GUID,
.check = open_storage
},
[BKUP_FWU_METADATA_IMAGE_ID] = {
.dev_handle = &storage_dev_handle,
.image_spec = (uintptr_t)&metadata_block_spec,
.img_type_guid = NULL_GUID,
.check = open_storage
},
#endif /* (STM32MP_SDMMC || STM32MP_EMMC) && PSA_FWU_SUPPORT */
};
#define FCONF_ST_IO_UUID_NUMBER U(8)

3
plat/st/stm32mp1/include/platform_def.h
View File

@ -40,6 +40,9 @@
#define BL33_BINARY_TYPE U(0x0)
#else /* STM32MP_USE_STM32IMAGE */
#define FIP_IMAGE_NAME "fip"
#define METADATA_PART_1 "metadata1"
#define METADATA_PART_2 "metadata2"
#endif /* STM32MP_USE_STM32IMAGE */
#define STM32MP_PRIMARY_CPU U(0x0)