WIP UEFI EDK2 Implementation for Nintendo Switch or generic Tegra210 platforms
Capable to boot something from SD card. If you have a Linux kernel with EFI stub support, supply the device tree for any Tegra210 device (not limited to Nintendo Switch) should boot.
ACPI also boots Windows and Linux, but limited devices are provided (only CPU at this moment).
bcdedit /store E:\EFI\Microsoft\Boot\BCD /set {default} debug on
bcdedit /store E:\EFI\Microsoft\Boot\BCD /dbgsettings serial debugport:1 baudrate:115200
Plug in connector on the right-side Joy Con and connect to PC. Use WinDbg serial connection and it should work.
See Lumia950XLPkg. Almost identical!