[clever@system76:~/apps/rpi]$ git clone --recurse-submodules git@github.com:librerpi/lk-overlay.git
[clever@system76:~/apps/rpi]$ cd lk-overlay/
[clever@system76:~/apps/rpi/lk-overlay]$ nix-shell -A shell
[nix-shell:~/apps/rpi/lk-overlay]$ make PROJECT=rpi3-bootcode
[nix-shell:~/apps/rpi/lk-overlay]$ ls -lh build-rpi3-bootcode/lk.bin
-rwxr-xr-x 1 clever users 113K Mar 31 23:27 build-rpi3-bootcode/lk.bin
builds LK for the armv6 found on the pi0 and pi1
currently not working on this overlay
builds LK for the cortex-A7 found in a pi2
use lk.bin as your kernel.img file, with the official firmware
builds LK in aarch64 mode for the cortex-A53 found in a pi3
use lk.bin as your kernel.img file, with the official firmware
builds LK for the VPU on any VC4 pi (pi0 to pi3), use lk.bin as bootcode.bin
buids LK for the VPU on any VC4 pi (pi0 to pi3), use lk.elf as start.elf, with either the official bootcode.bin or vc4-stage1
builds LK for the VPU on a VC6 pi (pi4, pi400, CM4), use lk.bin as recovery.bin or bootcode.bin in spi flash, must be signed with https://github.com/librerpi/rpi-tools/tree/master/signing-tool
builds LK for the VPU on a VC6 pi (pi4, pi400, CM4), use lk.elf as start4.elf, with the official SPI firmware
builds LK as a bootcode.bin replacement, loads lk.elf from either an ext2 partition or xmodem over the uart
a test stage2 for use with vc4-stage1, currently it just brings the DPI online
a test stage2, that will embed rpi1-test into itself, and run LK on both the VPU and ARM