backup/restore concept?

Hi,

I have some doubts on backup and restore operation. From what i understand:

We copy all registers values & addresses of all controllers in the SOC to the internal RAM or SRAM. before we put CPU to sleep?

I want to know if we also copy the code segment into SRAM and what happens after wakeup. If so, where exactly we need to copy and how cpu jumps here after wakeup. or is there any other mechanism that is used. What executes first since DDR is in self-refresh.

I use OMAP4 and this is my understanding. I could not understand much other than in OFF mode all the controller registers get copied to SRAM. Does anything else also gets copied too? or am i missing any basics here.

Can anyone clarify my understanding.

/Ryan