MTK分区表中的Item描述说明

tangh

分区表中包含各个分区的配置信息，不同平台、版本可配置栏位略有差异，分区表名称如：partition_table_[xxxxxxx](其中[xxxxxxx]与平台、版本有关)。

附上一张MT6762的分区表，对照研究其意义。

Item	Description
Partition_Name	Partition name, only characters and numbers are supported
Type	Partition type, EXT4/FAT/Raw data
Size_KB	Partition size, unit is KB
Region	Which part of physical area in eMMC is the partition stored, boot/rpmb/user region
Group	Update group.  Each dynamic partition can belong to an update group. Reference:  https://source.android.com/devices/tech/ota/dynamic_partitions/implement
Reserved	'Y' means this partition is reserved in the last position of eMMC. Size_KB is the real size, but linear_start_addr is not used any more
Download	'Y' means this partition supports flashtool download.
Download_File	Image's name to download in detail. If Download item is 'N', it is meaningless.
OTA_Update	'Y' means this partition supports OTA upgrade, only when Type is 'Raw data'.
EmptyBoot_Needed	'Y' means this partition supports xflash feature. Partition labeled 'Y' is shown to preloader. The default list is 'lk''logo''tee1'. xflash feature - flash download with no images in flash when not using flashtool. When some customers do not use flashtool to do first-time download, a specific tool will be provided by MTK to do download. Xflash steps - brom burns preloader, then preloader will download those partitions labled 'Y'. Thus preloader is labeled 'N'.
FastBoot_Erase	'Y' means this partition supports fastboot erase.
FastBoot_Download	'Y' means this partition supports fastboot download.
Operation_Type	Operation type for flashtool. Five types: 'BOOTLOADERS' - preloader, used in security download 'PROTECTED' - protect partition, should backup/restore in firmware-upgrade if layout changes. If layout has no changes, just keep it. 'BINREGION' - nvram backup partition, should backup/restore in firmware-upgrade if layout changes. If layout has no changes, just keep it. 'AUTO' - normal partition, will be formatted in firmware-upgrade. ‘RESERVED’ - reserved partition, the same meaning as item 'Reserved'. This partition may be overwritten or updated in download/firmware-upgrade.