External Flash Layout¶

Contains common structures and defines related to external flash layout as it for the OAD usecase.

Defines

OAD_EFL_MAGIC¶

Magic number used by entries in the image header table at the beginning of external flash. Note this is different from OAD_IMG_ID_VAL so that the application can determine the difference between an entry in the header table and the start of an OAD image

Note: This is only used by off-chip OAD

OAD_EFL_MAGIC_SZ¶: Length of external flash magic string, this is the length of OAD_EFL_MAGIC_SZ

EFL_ADDR_META¶: Address at which the table of external flash image structures start Each record is populated by ExtImageInfo_t

EFL_SIZE_META¶: Size of each entry in the external flash image header table Entries in the table are page aligned to allow for easy erasing

EFL_META_PG_INVALID¶: Flag to indicate that the candidate external flash image header page is invalid

EFL_FACT_IMG_META_PG¶: The page in which the external flash image header of the factory image resides

EFL_ADDR_META_FACT_IMG¶: The address of the external flash header for the factory image

EFL_META_COPY_SZ¶: Size of core header portion to copy

EFL_METADATA_LEN¶: Length of ExtImageInfo_t structure in bytes

EFL_IMG_STR_ADDR_OFFSET¶: Offset of the image address in external flash into the ExtImageInfo_t structure

EFL_META_COUNTER_OFFSET¶: Offset of the timestamp/counter into the ExtImageInfo_t structure

struct ExtImageInfo_t¶

#include <ext_flash_layout.h>

External flash image header used to populate the table of image headers in external flash.

Public Members

imgFixedHdr_t fixedHdr¶: This is the core image header.

uint32_t extFlAddr¶: Location of the image in ext flash.

uint32_t counter¶: Timestamp/counter of image.