[PATCH 2/3] arm: caches: add DCACHE_DEFAULT_OPTION

[Patrick DELAUNAY]

Dear Marek,

> From: Uboot-stm32 <uboot-stm32-bounces at st-md-mailman.stormreply.com> On
> Behalf Of Patrick DELAUNAY
> 
> Dear Marek,
> 
> > From: Marek Vasut <marex at denx.de>
> > Sent: vendredi 3 avril 2020 23:29
> >
> > On 4/3/20 10:28 AM, Patrick Delaunay wrote:
> > > Add the new flags DCACHE_DEFAULT_OPTION to define the default option
> > > to use according the compilation flags
> > > CONFIG_SYS_ARM_CACHE_WRITETHROUGH or
> > CONFIG_SYS_ARM_CACHE_WRITEALLOC.
> >
> > Can't you unify these macros into a single Kconfig "select" statement
> > instead , and then just select the matching cache configuration in Kconfig ?
> 
> Yes I will try, with 2 steps
> - migrate existing CONFIG_SYS_ARM_CACHE_.... in Kconfig

First step done...
I will push it as a separate patchset I think.

> - add new option CONFIG_SYS_ARM_CACHE_OPTION

In fact it is to difficult to use select because each defines
DCACHE_XXX value can have several values

they are build according CONFIG_ARM64 / LPAE

But, I can't use this define in Kconfig

I try :
option	ARM_OPTION
	int "option"
	default DCACHE_WRITETHROUGHT if CONFIG_SYS_ARM_CACHE_WRITETHROUGH
	default DCACHE_ WRITEALLOC if CONFIG_SYS_ARM_CACHE_ WRITEALLOC
	default DCACHE_WRITEBACK if CONFIG_SYS_ARM_CACHE_WRITEBACK

int and hex is invalid, and string can't be use with "".

And I don't found way to build it automatically when option is activated.

Any idea ?

Regards

Patrick