Boot without SD Card?

Any way to boot without SD Card ?

I following the instruction of jawn-smith " [Installing Ubuntu 21.04 on the HiFive Unmatched]" on nvme and everything work fine but the SD card is needded to boot.

Can I use the Boot Mode Select DIP Switch to boot without sd card ?

This is currently not implemented in U-Boot SPL. SPI-NOR Flash is empty out of the factory and doesn’t contain any firmware.

not implemented in U-Boot SPL
doesn’t contain any firmware

can we hope implementation or firmware soon ?

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