[U-Boot] U-Boot PXA support

[Marek Vasut]

On 5/21/19 12:33 PM, Marcel Ziswiler wrote:
> On Tue, 2019-05-21 at 12:50 +0300, Alex Sadovsky wrote:
>> It's slightly off-topic but I wonder whether this ongoing deprecation
>> of ARMv4 and ARMv5 (first in GCC, then in U-Boot) really simplifies
>> anything at all.
>> There are tons of devices that are still working good and there are
>> even ARMv5-based MCUs that are still produced (such as CH561
>> manufactured by WCH).
> 
> Please note that as of today Marvell is also still producing them PXAs
> which are not to go end-of-life before later next year I believe.
> 
>> IMHO it makes sense to drop only the XScale-specific tuning first and
>> to treat PXA (and similar CPUs) as a more generic armv5te. I wonder
>> what to do when GCC drops ARMv5 completely...
> 
> I believe it was only an issue with early gcc 8 but does work just fine
> again with later 8.2 or 8.3 versions.
> 
> However, what is more concerning to me is that in today's convoluted
> moloch known as U-Boot there may simply not be any space any more for
> something truly embedded but somewhat limited like PXA based hardware.

If we ignore the PXA25x/26x, the PXA27x has loads of SRAM for U-Boot SPL
and then can load U-Boot proper into DRAM. What's the problem ?

-- 
Best regards,
Marek Vasut