Boot NVME device on sparc64

Hi there, Does anyone have a way of booting a pcie nvme device on sparc64.
I can install OBSD on the device but of course there is no way OBP can see
it
as a boot device. I can also use it for storage under OpenBSD which works
fine.

But! Is there any way to boot OpenBSD 6.5 installed on this drive on
sparc64.

I'm using a Sun t5120.

Kind regards John.