Uboot Hang after sctlr_el3.M is set to 1

Hi Expert,

I have ARMv8 A65.

I'm enabling MMU from uboot. Uboot hang on setting sctlr_el3.M bit to 1. 

So my question is Can i enable MMU with EL3?

if not when exactly i need to move to EL1 to enable MMU?

Thanks in advance

Regards,

Vishal