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

Tom Rini trini at konsulko.com
Tue Mar 31 01:30:35 CEST 2020

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>

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