[U-Boot] [PATCH v2] mx6: add support of multi-processor command

[Nikolay Dimitrov <picmaster@mail.bg>]

Hi Gabriel,

On 6/22/2014 5:24 PM, gabriel huau wrote:
> Hi Nikolay,
>
> I agree that you have to modify those OS to support 'multi-OS' on 
> different core but this customization is not part of u-boot in my 
> sense. For the second point, I have to disagree, the imx6 is totally 
> appropriate for AMP/multi-OS, in my case, I wasn't thinking about 
> virtualization which is something different but really about 
> multi-OS/Bare Metal application. The interrupt controller (GIC) can be 
> configured to distribute any interrupt on any core, for example, you 
> can have UART1 interrupt on core0 and UART2 interrupt on core1.
> The only problem is the resource partitioning but as I said this is 
> another subject which is not really part of u-boot and I already did 
> some test by running Android on core0 and QNX on core1 without any 
> problem as a proof of concept.
>
> A good example may be the support on this kind of application on the 
> Zynq: 
> http://www.wiki.xilinx.com/Multi-OS+Support+%28AMP+%26+Hypervisor%29
> This is also a Cortex A9 without the support of virtualization 
> extensions.
Thanks for sharing this info, I'll check it out. I come from the 
automotive industry where no one will allow running 2 OSes without 
hardware isolation, so this is how my opinion about AMP on imx6 was 
formed. And I agree that this actually isn't related with U-Boot itself 
other than just loading the payload and starting the extra cores.

Kind regards,
Nikolay