Re: [Qemu-devel] Adding secondary ARM processor

[mar.krzeminski]

W dniu 01.09.2015 o 19:45, Peter Crosthwaite pisze:
> On Tue, Sep 1, 2015 at 10:19 AM, mar.krzeminski
> <address@hidden> wrote:
> > Hello,
> >
> > I have board with A9 processor (playing with vexpress model),
> > for test I want to also add to this setup M3 processor.
> > The problem is that secondary CPU sees the same device (eg. UART) with
> > different address.
> How far into the boot are you? Does A9 have MMU turned on?
>
> info mtree from the monitor should show the view of the address maps.
> Anything weird there?
I mess my question, sorry.
I meant that address seen from M3 are different by design,
eg. UART0 seen from M3 has base address 0x100, but same UART0 from A9 is 
mapped at 0x200 and I want to emulate this.
This required some remapping at sysbus level (I think), and I do not 
know how to do that - even where to start, that is why I need your help.
> > I can not figure out, how should I do that. Is it possible in qemu?
> Yes it should be possible.
>
> > If yes, could you point me where I should start to look at it?
> xlnx-zynqmp board, which does something similar with A53 and R5. It is
> mixed with a combo of MMU and no-MMU capable CPUs.
I saw this board, but my basic problem is with address mapping.
> Regards,
> Peter
>
> > Regards,
> > Marcin