Comment 7 for bug 1936370

> But does not check what was on the
> partitions before, or if they were used at all or not.

This is what our impish image looks like:

Number Start (sector) End (sector) Size Code Name
   1 235554 7339998 3.4 GiB 8300
  12 227362 235553 4.0 MiB 8300 CIDATA
  13 34 2081 1024.0 KiB FFFF loader1
  14 2082 10273 4.0 MiB FFFF loader2
  15 10274 227361 106.0 MiB EF00

Partitions 13 and 14 are only protective partitions. They are not needed at all to boot via U-Boot.

The place to flash U-Boot SPL (sector 34) is hard coded in the boot ROM.
The offset of 1 MiB to main U-Boot is encoded as jump address in OpenSBI.
The total length of main U-Boot is well below 4 MiB. But those 4 MiB will be large enough to install EDK II once released.

If U-Boot was previously installed it cannot be in a different place.

What you could check is that no partition with data (type 8300, EF00, ...) collides with what you flash.

Best regards

Heinrich