[U-Boot-Users] U-Boot-NG ?

Sascha Hauer
2007-07-03T09:44:50Z

On Mon, Jul 02, 2007 at 07:46:38PM -0600, Grant Likely wrote:
> On 7/2/07, Sascha Hauer <s.hauer@pengutronix.de> wrote:
> > On Tue, Jul 03, 2007 at 01:39:29AM +0200, Wolfgang Denk wrote:
> > >
> > > Do you mean you don't relocate the code any more?
> >
> > It still gets copied from the address U-Boot starts (Flash) to RAM, but
> > pointer offsets are not recalculated. This means that you must not use
> > statically initialized pointers during startup since the code is not
> > running at its link address.
>
> And this is a bug. Statically initialized pointers are supposed to be
> fixed up during relocation. I've got a big patch set which I'll be
> posting this evening (and would have already posted if I wasn't having
> SMTP problems) that solves this for 5xx, 5xxx, 82xx & 83xx.

If you do not use statically initialized pointer on startup and running
at the link address after startup, you do not need to fixup anything.

>
> I think the intent of relocation is that the u-boot image can always
> put itself at the end of SDRAM, regardless of how much ram is on the
> board. Not important for ports that have soldered down chips, but
> useful if the board has expandable memory.

When you can make use of this additional memory, ok. But I think on
U-Boot this is hardly the case.

Regards,
Sascha

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