[U-Boot] U-Boot port for esp32

Hi,

I am new to U-Boot, and looking for a U-Boot port for esp32 soc based on xtensa. Search for esp32 in search option in this forum for any existing question didn't show up anything.

Is there any U-Boot port (done/inprogress) for esp32?

If not, could somebody provide any link/guide on how to start?

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