I'm building a custom board based upon the LS1012A-FRWY and I'm studying how flex-builder (LSDK v20.12) creates the SD card to boot Ubuntu userland.
Why is is tiny_itb copied to the boot partition? I'm looking at the flex-builder generate_bootpartition_tarball() function. It copies the kernel, dtb, kernel modules, and distro boot script to the boot partition. But it also copies tiny_itb, which does not make sense to me. My understanding is that tiny_itb is the smallish Yocto TinyDistro. But the intention of the SD card is to contain and boot a largish Ubuntu distribution. Is it necessary for tiny_itb to be on the boot partition? When and how would this tiny_itb be used? The boot script is going to load Ubuntu and not tiny_itb.
I understand how tiny_itb can be used to initially format and program the SD card. (Before the Ubuntu distro is on the SD card, you can use U-Boot to load TinyDistro over Ethernet and into RAM, and then run TinyDistro to format and program Ubuntu userland onto the SD card.) What I don't understand is why is tiny_itb is included on the boot partition of the SD card along with the Ubuntu distribution.
