[PATCH v4 8/8] mkimage: fit_image: Add option to make fit header align

[Kever Yang]

Hi Tom,

     Who is suppose to pick up this series patches? Any thing I need to 
update?


Thanks,

- Kever

On 2020/3/31 上午7:30, Tom Rini wrote:
> On Mon, Mar 30, 2020 at 11:56:24AM +0800, Kever Yang wrote:
>
>> The image is usually stored in block device like emmc, SD card, make the
>> offset of image data aligned to block(512 byte) can avoid data copy
>> during boot process.
>> eg. SPL boot from FIT image with external data:
>> - SPL read the first block of FIT image, and then parse the header;
>> - SPL read image data separately;
>> - The first image offset is the base_offset which is the header size;
>> - The second image offset is just after the first image;
>> - If the offset of imge does not aligned, SPL will do memcpy;
>> The header size is a ramdon number, which is very possible not aligned, so
>> add '-B size'to specify the align size in hex for better performance.
>>
>> example usage:
>>    ./tools/mkimage -E -f u-boot.its -B 0x200 u-boot.itb
>>
>> Signed-off-by: Kever Yang <kever.yang at rock-chips.com>
>> Reviewed-by: Punit Agrawal <punit1.agrawal at toshiba.co.jp>
> Reviewed-by: Tom Rini <trini at konsulko.com>
>