[U-Boot] why u-boot remaps IMMR

Hello,

I have mpc8313e based evaluation board ... the default value of IMMRBAR = FF40_0000 according to processor manual ... but during configuration the default value is reset to E000_0000 ...

I would like to ask why this is being done ? ? ?

Kindly please acknowledge ... thank you ...

Kind Regards, Vijay Nikam