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Cortex-A9 AMP

Clemens Fischer
Note: This was originally posted on 8th January 2012 at http://forums.arm.com

Hi,

I am currently examining amp for embedded devices.

Is it possible to boot two operating systems on an Cortex-A9 in amp mode?

The p2020 power processor is capable of amp and there is an  implementation in u-boot that makes it possible to boot two os in amp  mode. Is there a similar implementation for the Cortex-A9? And if  not, is it possible and what steps are necessary to implement amp with  the Cortex-A9 cpu using u-boot or a different boot loader?

 

Any information would be helpful.

Best regards

Clemens

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  • Arm Employee Badge
    Note: This was originally posted on 11th January 2012 at http://forums.arm.com

    Information on the MMU is architectural.  So you need to see the ARM Architecture Reference Manual.

    The SMP/AMP naming thing is somewhat misleading.  Enabling the MMU and setting the ACTLR.SMP bit enables the hardware coherency management.  That does not necessarily mean you have to being running a SMP OS.  Assuming that the different OSes have to talk to each other, hardware coherency could still be beneficial.
Reply
  • Arm Employee Badge
    Note: This was originally posted on 11th January 2012 at http://forums.arm.com

    Information on the MMU is architectural.  So you need to see the ARM Architecture Reference Manual.

    The SMP/AMP naming thing is somewhat misleading.  Enabling the MMU and setting the ACTLR.SMP bit enables the hardware coherency management.  That does not necessarily mean you have to being running a SMP OS.  Assuming that the different OSes have to talk to each other, hardware coherency could still be beneficial.
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