How to retrieve cpu info from u-boot fucntion?

Hello,

Currently, I am using the MAC address from eth_get_ethaddr() function to calculate a hash value. But, I would like to replace this with a more unique device info such as cpuid or other values. But I could not find any function that can retrieve cpu info.

Can anyone please point me in the correct direction? Do we have any functions for this? Are these things part of the documentation?

Thanks in advance.

Kind regards, Sourabh