[U-Boot] [PATCH 1/2] arm: timer: factor out FSL arch timer erratum workaround

[Alexander Graf]

> Am 03.07.2018 um 22:51 schrieb Andreas Färber <afaerber at suse.de>:
> 
>> Am 03.07.2018 um 01:08 schrieb Andreas Färber:
>>> Am 02.07.2018 um 10:01 schrieb Jagan Teki:
>>>> On Wed, Jun 27, 2018 at 6:12 AM, Andre Przywara <andre.przywara at arm.com> wrote:
>>>> At the moment we have the workaround for the Freescale arch timer
>>>> erratum A-008585 merged into the generic timer_read_counter() routine.
>>>> Split those two up, so that we can add other errata workaround more
>>>> easily. Also add an explaining comment on the way.
>>>> 
>>>> Signed-off-by: Andre Przywara <andre.przywara at arm.com>
>>>> ---
>>> 
>>> Applied both patches, to u-boot-sunxi/master
>> 
>> Tested both on top of v2018.07-rc2, fixes the boot for me.
> 
> Actually I saw it again just now, without having touched U-Boot at all.
> Unplugged power, retried, worked. So it seems we've reduced the
> likelihood, but something might still be astray...

So maybe we need to instead apply some logic that loops until cnt == prev_cnt+1?

Also, is there any way to just trap counter reads from EL3? It'd be quite tedious to fix up all OSs out there.

Alex