Re: KHADAS EDGE V booting hangs if I install UEFI instead of u-boot

On Aug 5, 2025, at 21:46, Mario Marietto <[email protected]> wrote:

> . . .
> 
> https://github.com/andreiw/rk3399-edk2
> 
> does not talk about how to fill this partition at all.
> 
> . . .

Nor should the material about building RK3399_SDK_UEFI.img
also talk about the "efi esp" content, which is a separate
thing.

In:

Number  Start (sector)    End (sector)  Size       Code  Name
   1              64            8063   3.9 MiB     FFFF  loader1   <-- Rk3399Pkg/Tools/Bin/idbloader.bin
   2            8064            8191   64.0 KiB    FFFF  reserved1
   3            8192           16383   4.0 MiB     FFFF  reserved2
   4           16384           24575   4.0 MiB     FFFF  loader2   <-- RK3399_SDK_UEFI.img
   5           24576           32767   4.0 MiB     FFFF  atf       <-- Rk3399Pkg/Tools/Bin/trust.img
   6           32768          262143   112.0 MiB   EF00  efi esp

"efi esp" is a particular type of msdosfs file system
that is to contain FreeBSD's EFI Boot Loader (FreeBSD
aarch64 context used below, not what you were using):

EFI/BOOT/bootaa64.efi

That file is a copy of FreeBSD's aarch64 /boot/loader.efi :

# diff /boot/loader.efi  /boot/efi/EFI/BOOT/bootaa64.efi
#

So: no differences. In the context for the above,
/boot/efi is the mount point where the file system in
the "efi esp" was mounted to be visible in the FreeBSD
file system.

Note: the EFI/BOOT/ capitalization convention is my
personal one, not necessarily what FreeBSD normally
uses.

RK3399_SDK_UEFI looks for any finds that
EFI/BOOT/bootaa64.efi and then loads and
uses it.

===
Mark Millard
marklmi at yahoo.com