[U-Boot] [PATCH] arm: Use mtune for Xscale

[Alexey Brodkin]

Hello,

Just a short update.

On Fri, 2018-05-25 at 12:04 +0300, Alexey Brodkin wrote:
> Otherwise with GCC 8 we see this warning [which is rendered to an error
> with -Werror, which happens for buildman/travisci], see [1]:
> ------------------------------->8-------------------------------
> cc1: warning: switch -mcpu=xscale conflicts with -march=armv5te switch
> ------------------------------->8-------------------------------

Even though problem listed above got solved with this patch but it introduces
another issue I missed initially with GCC 8.1.0, see [3]:
------------------------------->8-------------------------------
       arm:  +   h2200
+arch/arm/cpu/pxa/start.S: Assembler messages:
+arch/arm/cpu/pxa/start.S:179: Error: selected processor does not support `strd r4,[r1],#8' in ARM mode
------------------------------->8-------------------------------

[3] https://travis-ci.org/abrodkin/u-boot/jobs/383423699

So that doesn't seem to be the easy fix :(

-Alexey

> Interesting enough with GCC 7.3.0 (which is current default in buildman)
> that change leads to another failure, see [2]:
> ------------------------------->8-------------------------------
> Error: selected processor does not support `pld [lr]' in ARM mode
> ------------------------------->8-------------------------------
> 
> So I guess this change might be put in series with buildman toolchain
> bump.
> 
> [1] https://travis-ci.org/abrodkin/u-boot/jobs/383219348
> [2] https://travis-ci.org/abrodkin/u-boot/jobs/383594006
> 
> Signed-off-by: Alexey Brodkin <abrodkin at synopsys.com>
> Cc: Albert Aribaud <albert.u.boot at aribaud.net>
> ---
>  arch/arm/Makefile | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/arch/arm/Makefile b/arch/arm/Makefile
> index 680c6e8516dc..18e0193c43c0 100644
> --- a/arch/arm/Makefile
> +++ b/arch/arm/Makefile
> @@ -37,7 +37,7 @@ tune-$(CONFIG_CPU_ARM920T)	=
>  tune-$(CONFIG_CPU_ARM926EJS)	=
>  tune-$(CONFIG_CPU_ARM946ES)	=
>  tune-$(CONFIG_CPU_SA1100)	=-mtune=strongarm1100
> -tune-$(CONFIG_CPU_PXA)		=-mcpu=xscale
> +tune-$(CONFIG_CPU_PXA)		=-mtune=xscale
>  tune-$(CONFIG_CPU_ARM1136)	=
>  tune-$(CONFIG_CPU_ARM1176)	=
>  tune-$(CONFIG_CPU_V7A)		=