i.MX53 TrustZone cross world interactions

[Ofer Hasson]

Thank you very much, it works.

On Tue, May 5, 2015 at 12:59 PM, Martin Stein <martin.stein at ...1...>
wrote:

> Hi Ofer,
>
> On 05.05.2015 11:06, Ofer Hasson wrote:
> > My question is, how in the Genode hypervisor I can access this memory
> > address ?
> > Any idea will be helpful
>
> You should have a look at '_ram_iomem' in [1]. It is the IO_MEM session
> of the VMM that references the RAM of the normal world. Once estalished,
> this session provides a refernce to the RAM in form of a so-called
> dataspace. This dataspace can be used to attach the RAM locally via
> 'env()->rm_session()'. The VMM stores the resulting local address in
> 'Vm_base::_ram'. So, if you're in the VMM, you can acces the RAM through
> this object. If you're in another component you would have to request
> the VMM to release the IO_MEM-Region to be able to allocate it through a
> new IO_MEM session.
>
> Cheers,
> Martin
>
> [1] repos/os/src/server/tz_vmm/include/vm_base.h
>
>
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