[U-Boot] [U-Boot, 1/2, v4] powerpc/mpc85xx: SECURE BOOT- NAND secure boot target for P3041

Scott Wood
2015-03-05T17:08:03Z

On Thu, 2015-03-05 at 01:26 -0600, Bansal Aneesh-B39320 wrote:
> > -----Original Message-----
> > From: Wood Scott-B07421
> > Sent: Thursday, March 05, 2015 2:41 AM
> > To: Bansal Aneesh-B39320
> > Cc: u-boot at lists.denx.de; Sun York-R58495; Gupta Ruchika-R66431
> > Subject: Re: [U-Boot, 1/2, v4] powerpc/mpc85xx: SECURE BOOT- NAND
> > secure boot target for P3041
> >
> > Where does the 3.5G limitation come from? Even if the physical address
> > needs to be elsewhere due to bootrom constraints, we should be able to
> > map it wherever we want in the TLB once U-Boot takes control.
> >
> The 3.5G limitation comes from BootROM in case of secure Boot.
> Initially U-Boot has to run from CPC configured as SRAM with address
> Within 3.5G. Once U-boot has relocated to DDR, we have removed the
> Corresponding TLB entry.

Again, you could relocate the virtual address of L3 much earlier.

-Scott