MPC8548E Memory Map CCSR

[axlmr]

I have a question about the  CCSR Register

In the documentations says

“All of the memory mapped configuration, control, and status registers in the MPC8548E are contained

within a 1-Mbyte address region. To allow for flexibility, the configuration, control, and status block is

relocatable in the local address space.” ‘Section 2.3 Reference Manual.

What is the process to relocate this register? When and How it is done?

[scottwood]

The process is documented in the "Updating CCSRBAR" section of the manual (4.3.1.1.1).  It is typically done during early boot if the default address isn't desired (e.g. if you want to use 4GiB or more of RAM, you'll want to move CCSR out of the way).  U-Boot has code to relocate CCSRBAR in arch/powerpc/cpu/mpc85xx/start.S.