[U-Boot] [PATCH v2 3/4] ARM: use r9 for gd

Jeroen Hofstee
2013-08-17T09:40:36Z

On 08/14/2013 08:25 PM, Jeroen Hofstee wrote:
> To be more EABI compliant and as a preparation for building
> with clang, use the platform-specific r9 register for gd
> instead of r8.
>
> note: The FIQ is not updated since it is not used in u-boot,
> and under discussion for the time being.
>
> The following checkpatch warning is ignored:
> WARNING: Use of volatile is usually wrong: see
> Documentation/volatile-considered-harmful.txt
>
> cc: Albert ARIBAUD <albert.u.boot@aribaud.net>
> Signed-off-by: Jeroen Hofstee <jeroen@myspectrum.nl>
> ---
> arch/arm/config.mk | 2 +-
> arch/arm/include/asm/global_data.h | 2 +-
> arch/arm/lib/crt0.S | 16 ++++++++--------
> 3 files changed, 10 insertions(+), 10 deletions(-)
>

This patch assumes only crt0.S sets the register used for
gd in asm. I just noticed cpu/armv7/lowlevel_init.S does set gd
manually, so all users of the common board.c are likely
bricked with the patch as is. Looking into it....

Regards,
Jeroen