[Buildroot] [PATCH 2/2] toolchain: Add support for Cortex-M4 processor

[Arnout Vandecappelle <arnout@mind.be>]

On 09/17/15 09:21, Chris Wardman wrote:
> This patch adds support for the Cortex-M4 processor. Cortex-M4 is almost
> completely identical to the Cortex-M3 processor. Cortex-M4 uses the same
> Thumb2/Thumb instruction set. Not sure if the extra M4 DSP instructions are
> currently supported.
>
> Signed-off-by: Chris Wardman <cjwfirmware@vxmdesign.com>
> ---
>   arch/Config.in.arm | 6 ++++++
>   1 file changed, 6 insertions(+)
>
> diff --git a/arch/Config.in.arm b/arch/Config.in.arm
> index 4d10f4c..5055cb5 100644
> --- a/arch/Config.in.arm
> +++ b/arch/Config.in.arm
> @@ -156,6 +156,11 @@ config BR2_cortex_m3
>   	bool "cortex-M3"
>   	select BR2_ARM_CPU_HAS_THUMB
>   	select BR2_ARM_CPU_HAS_THUMB2
> +config BR2_cortex_m4
> +	bool "cortex-M4"
> +	select BR2_ARM_CPU_HAS_THUMB
> +	select BR2_ARM_CPU_HAR_THUMB2
> +	select BR2_ARM_CPU_ARMV7M

  This symbol doesn't exist yet, but it probably should. Can you add a separate 
patch to add that symbol (and select it from cortex_m3)?


  Regards,
  Arnout

>   config BR2_fa526
>   	bool "fa526/626"
>   	select BR2_ARM_CPU_HAS_ARM
> @@ -419,6 +424,7 @@ config BR2_GCC_TARGET_CPU
>   	default "cortex-a12"	if BR2_cortex_a12
>   	default "cortex-a15"	if BR2_cortex_a15
>   	default "cortex-m3"	if BR2_cortex_m3
> +	default "cortex-m4"     if BR2_cortex_m4
>   	default "fa526"		if BR2_fa526
>   	default "marvell-pj4"	if BR2_pj4
>   	default "strongarm"	if BR2_strongarm
>


-- 
Arnout Vandecappelle                          arnout at mind be
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