Re: [PATCH 9/9] ARM: vexpress: Config option for early printk console

[Jonathan Austin <jonathan.austin@xxxxxxx>]

Hi Pawel,

On 11/07/12 14:36, Pawel Moll wrote:
> diff --git a/arch/arm/Kconfig.debug b/arch/arm/Kconfig.debug
> index 01a1341..12eee87 100644
> --- a/arch/arm/Kconfig.debug
> +++ b/arch/arm/Kconfig.debug
> @@ -310,6 +310,32 @@ choice
>  		  The uncompressor code port configuration is now handled
>  		  by CONFIG_S3C_LOWLEVEL_UART_PORT.
>  
> +	config DEBUG_VEXPRESS_UART0_DETECT
> +		bool "Autodetect UART0 on Versatile Express Cortex-A core tiles"
> +		depends on ARCH_VEXPRESS
> +		help
> +		  This option enables simple heuristic which tries to determine
> +		  motherboard's memory map variant (original or RS1) and then
> +		  choose relevant UART0 base address.
> +
> +		  Note that this will only work with standard A-class core tiles,
> +		  and may fail with non-standard SMM or custom software model.
> +

Is it possible to make this depend on something like CPU_CP15_MMU,
instead of ARCH_VEXPRESS? Seems like a reasonable way to ensure that
this isn't used on some of the core tiles that don't have the required
cp15 registers to read the Configuration Base Address Register.

Jonny


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