[RFC PATCH 3/3] ARM: Introduce MPS3 AN536

[Vladimir Murzin]

Hi Stefano,

On 6/30/22 21:36, Stefano Stabellini wrote:
> On Thu, 30 Jun 2022, Vladimir Murzin wrote:
>> Application Note 536 FPGA image implements the dual Cortex-R52 system
>> which is extended with interconnect and peripherals to provide an
>> example design.
>>
>> Unfortunately, design does't support exclusive access to shareable
>> memory which is show stopper for SMP support - we enforce shareable
>> attribute via MPU.
> 
> Hi Vladimir,
> 
> What do you mean by "design does't support exclusive access to shareable
> memory"?
> 

I meant platform integration issue and it has nothing to do with core itself,
in other words it is the issue for this particular platform.

> I thought it was possible to use LDREX/STREX on memory shared between
> two R52 cores as long as the memory is uncacheable.

That's correct understanding assuming integration done correctly :) 

Cheers
Vladimir