[U-Boot-Users] [Patch 2/4] U-Boot-V2: ARM: introduce CONFIG_SKIP_RELOCATION

[Sascha Hauer <s.hauer@pengutronix.de>]

On Wed, May 07, 2008 at 07:56:25PM +0200, Wolfgang Denk wrote:
> In message <20080507152912.GJ4326@pengutronix.de> you wrote:
> >
> > CONFIG_RELOCATABLE on powerpc means something different. On arm we start
> > U-Boot by running it at an address != link address and _copy_ (not
> > relocate) ourselves to the address we are linked at. On powerpc real
> > relocation is done if CONFIG_RELOCATABLE is enabled.
> > Hence the option you wanted to add should better have the name
> > CONFIG_SKIP_COPY_TO_SDRAM or something like that.
> 
> This is something that I always wanted to fix. The ARM implementation
> is broken by design - unfortunately it has been also used  for  MIPS,
> and  other  architectures.  It  would  be  much better if we had real
> relocation to a (dynamically determined) address on ARM too,  instead
> of such a fixed mapping.

I wouldn't say broken. With a fixed mapping you get smaller code size
and for many cases it's just enough. So I vote for having both.

Regards
 Sascha

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