[U-Boot] P4080 Reset Vector

[Tony Wang]

Liu Dave-R63238 <r63238 <at> freescale.com> writes:

> 
> > For that reset address question, I think because p4080ds's FPGA can do
> this address
> > decode and map 0xefffxxxx to 0xffffxxxx setting by SW7, is it right?
> 
> No. FPGA doesn't matter with it.
> 
> The e500mc core boot start address(0xFFFF_FFFC) will point to the end of
> CS0 Flash due to OR0[AM]=0.
> In this phase, the core is using the relative addressing.
> After you change the BR0,OR0, you can use absolute addressing.
> 
> Keep in mind, the bootloader is placed to the end of CS0, and the RCW is
> placed to the start of CS0.
> 
> > I also has another quesition, if I choose boot from bank0, why RCW
> should be
> > programmed into address 0xe8000000? is it a rule of chip design?
> 

 Thanks Dave, 

It look same as other PQ2/3 which using BR0/OR0 to set boot vecror base address.

just confirm, do you know CPU will read RCW data before it jump to 0xFFFF_FFFC?

/Tony