[U-Boot] [RFC] arm926ejs: fix jump to RAM nand_boot

[V, Aneesh]

Dear Wofgang, 

> -----Original Message-----
> From: Wolfgang Denk [mailto:wd at denx.de]
> Sent: Wednesday, November 03, 2010 4:58 PM
> To: V, Aneesh
> Cc: Reinhard Meyer; Albert ARIBAUD; u-boot at lists.denx.de; hs at denx.de
> Subject: Re: [U-Boot] [RFC] arm926ejs: fix jump to RAM nand_boot
> 
> Dear "V, Aneesh",
> 
> In message
> <FF55437E1F14DA4BAEB721A458B6701706FD3137F3 at dbde02.ent.ti.com> you
> wrote:
> >
> > If the preloader loads the u-boot to the location that it is built
> for
> > everything should work fine once bss is initialized, right?
> 
> There is no such thing as a "location that it is built for", as the
> location in RAM may differ, depending on enabled features - for
> example, pRAM size or (shared) frame buffer size may change
> depending
> on environment variable settings. In the result, the location of
> U-Boot in RAM shifts.  You cannot know the final address at build
> time.

Just curious. Why don't we allocate memory for such needs below the
u-boot (lower address) like we do for malloc area and stack. This way
the location where u-boot is relocated will only depend on the SDRAM 
size and size of u-boot itself, right?

Best regards,
Aneesh