[U-Boot] [U-Boot, v7, 2/2] arm: move gd handling outside of C code

[Tom Rini]

On Wed, Nov 25, 2015 at 05:56:33PM +0100, Albert ARIBAUD wrote:

> As of gcc 5.2.1 for Thumb-1, it is not possible any
> more to assign gd from C code, as gd is mapped to r9,
> and r9 may now be saved in the prolog sequence, and
> restored in the epilog sequence, of any C functions.
> 
> Therefore arch_setup_gd(), which is supposed to set
> r9, may actually have no effect, causing U-Boot to
> use a bad address to access GD.
> 
> Fix this by never calling arch_setup_gd() for ARM,
> and instead setting r9 in arch/arm/lib/crt0.S, to
> the value returned by board_init_f_alloc_reserve().
> 
> Signed-off-by: Albert ARIBAUD <albert.u.boot at aribaud.net>
> Reviewed-by: Simon Glass <sjg at chromium.org>

Applied to u-boot/master, thanks!

-- 
Tom
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