SocFPGA: Arria10: Boot from FPGA

Hello,

I want to boot U-Boot on the Arria10 from the FPGA using recent code. In the past I used the U-Boot created by the "bsp-editor" as described at [1], but starting with Quartus 21.3, the so called "old flow" is no longer available.

I was able to build mainline U-Boot for our Arria10 board and it boots fine from the eMMC. I wonder if it's also suitable for booting from the FPGA. Is it available? Has this already been done? IIRC, some special hacks are required to support boot from the FPGA.

[1] https://rocketboards.org/foswiki/Documentation/UBootA10FPGABoot

Wolfgang