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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

Parents
  • Arm Employee Badge
    Note: This was originally posted on 9th January 2012 at http://forums.arm.com

    Yes, you can run 2+ OSes on a Cortex-A9 MPCore processor.  It's just that most people don't (at least, that is my experience).

    Technically, the challenge is co-ordinating the use of shared resources between the 2+ OSes.  For example, there is a shared interrupt controller (IC) in the MPCore processors.  You need some way to decided which OS is allowed to configure which parts of the IC.  The same goes for all the other things visible to both OSes.
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  • Arm Employee Badge
    Note: This was originally posted on 9th January 2012 at http://forums.arm.com

    Yes, you can run 2+ OSes on a Cortex-A9 MPCore processor.  It's just that most people don't (at least, that is my experience).

    Technically, the challenge is co-ordinating the use of shared resources between the 2+ OSes.  For example, there is a shared interrupt controller (IC) in the MPCore processors.  You need some way to decided which OS is allowed to configure which parts of the IC.  The same goes for all the other things visible to both OSes.
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