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