[U-Boot] [PATCH 2/2] mtd/nand : workaround for Freescale FCM to supportlarge-page Nand chip

[Scott Wood]

On Tue, 5 Jul 2011 19:08:21 -0400
"Matthew L. Creech" <mlcreech at gmail.com> wrote:

> On Tue, Jun 28, 2011 at 12:30 PM, Scott Wood <scottwood at freescale.com> wrote:
> > On Tue, 28 Jun 2011 11:35:12 -0400
> > Mike Hench <mhench at elutions.com> wrote:
> >
> >>
> >> Any boot ideas ?
> >> Will the FCM load 2k and run it?
> >
> > The 4K boot region will have to be split over pages 0 and 2 (2k view) or
> > the first half of pages 0 and 1 (4k view).
> >
> 
> (Redirecting to the U-Boot list)
> 
> Hi Scott,
> 
> Does this kind of page-splitting only apply to the IPL and nothing
> else?

Yes, because that's loaded directly by the hardware which doesn't
implement this workaround.

> If so, it seems that if:
> 
> 1. modifications are made to U-Boot's fsl_elbc_nand driver similar to
> Liu Shuo's kernel mods, and
> 2. an option is added to generate u-boot-nand.bin with its IPL split
> into two 2k chunks
> 
> then we can boot and run entirely from a 4k page device on MPC 83xx, correct?

That's the plan, though I don't know whether it's been tried yet.

-Scott