UVM_REG : override some addresses of old register model with another register model.

Hi ,

   I have a  top register model. in that some address part is defined as memory. ( ex :- 0x0,4,8 ,c registers address then 0x10 memory then 0x20,0x24,0x28 ... registers) 

I have another register model , which has all the registers which fit the space defined as memory  in top register model. (ex: 0x10,0x14,0x18,0x1c as registers)

could you please suggest me how to map them .

Regards,

Pavan.