Re: [Qemu-devel] Regarding Cortex-A7 CPU definition

[Deepak kumar Raju <raju.deepakkumar@gmail.com>]

[-- Attachment #1: Type: text/plain, Size: 1412 bytes --]

Hi Peter,
Thanks a lot for the information.

Can you please help me with the cortex-a7 CPU definitions/configuration
that I need to add in QEMU. Thanks,

Best Regards,
-Deepak



On Mon, Feb 8, 2016 at 9:24 PM, Peter Maydell <peter.maydell@linaro.org>
wrote:

> > On Mon, Feb 8, 2016 at 2:21 PM, Deepak kumar Raju <
> raju.deepakkumar@gmail.com> wrote:
> >> I am Deepak. I have a Cortex-A7 board and I am using qemu code from
> Linaro.
> >> In Qemu-linaro.git, under .../target-arm/cpu.c, I do not see CPU
> definitions for Cortex-A7.
> >> I have few questions:
> >>
> >> a)Can you please point to Cortex-A7 CPU definitions?
>
> We don't implement a Cortex-A7 in QEMU, because we have no board
> models that need it.
>
> >> b) Can we use the CPU definitions of Cortex-A15 for Cortex-A7?
>
> Typically guest code doesn't care about the exact CPU type between
> the A15 and the A7. If you wanted to add A7 support then starting
> with the A15 would be a good start.
>
> >> c) What would be the diff of Cortex-A7 definitions compared to
> Cortex-A15?
>
> You need to look at the Technical Reference Manual for the two CPUs
> to determine the difference. As far as QEMU is concerned the things
> to look at are:
>  * ID register values
>  * supported CPU features
>  * any implementation-specific coprocessor registers
>
> ...in other words, all the things we set in the
> cortex_a15_initfn().
>
> thanks
> -- PMM
>

[-- Attachment #2: Type: text/html, Size: 2068 bytes --]