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

[Patrick DELAUNAY]

Hi

> From: Marek Vasut <marex at denx.de>
> Sent: mercredi 8 avril 2020 20:18
> 
> On 4/8/20 8:16 PM, Patrick DELAUNAY wrote:
> > 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
> > - add new option CONFIG_SYS_ARM_CACHE_OPTION
> >
> >> Or better yet, can't you extract this info from DT ?
> >
> > I don't think.... it is called before device tree parsing
> >
> 
> The FDT access should be set up as one of the first things during U-Boot's
> boot_init_f , so it should be possible.

But I try to activate de dcache to speed-up the device tree parsing.... 
So the MMU function is now called really early,  in arch init.

Or I miss something.

Patrick