Punit Agrawal <[email protected]> writes: > Kever Yang <[email protected]> writes: > >> 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' to specify the align size in hex for better performance. >> >> example usage: >> ./tools/mkimage -E -f u-boot.its -B 200 u-boot.itb >> >> Signed-off-by: Kever Yang <[email protected]>
I hit send to soon - please don't forget to update the commit subject in the next posting. Thanks, Punit [...]
