You can find these files in the BSP Layer at:
meta-bsp_root_name
/binary/bootable_images
This optional area contains useful pre-built kernels and user-space filesystem images released with the BSP that are appropriate to the target system. This directory typically contains graphical (e.g. Sato) and minimal live images when the BSP tarball has been created and made available in the Yocto Project website. You can use these kernels and images to get a system running and quickly get started on development tasks.
The exact types of binaries present are highly
hardware-dependent.
The
README
file should be present in the BSP Layer and it
explains how to use the images with the target hardware.
Additionally, the
README.sources
file should be present to locate the sources used to
build the images and provide information on the
Metadata.