Re: System Tick in QEMU

[asif siddiqui]

Hi Edgar, 

We could see Triple Timer Counter QEMU status as Yes under section Timers and Clock Generators in the given link (https://www.xilinx.com/support/documentation/sw_manuals/xilinx2018_2/ug1169-xilinx-qemu.pdf).

Is it meant for xilinx ZCU102 machine or some other machine type ? 



Regards
Asif

On Fri, Aug 20, 2021 at 1:37 PM asif siddiqui <asifsiddiqui120@gmail.com> wrote:

Hi Edgar, 

Thanks for the input.

Is there any alternative solution for reading the TTC ? 
Is there any latest version of QEMU in which TTC is implemented for ZCU102 machine ? 


Regards
Asif

On Thu, Aug 19, 2021 at 8:39 PM Edgar E. Iglesias <edgar.iglesias@gmail.com> wrote:

On Thu, Aug 19, 2021 at 10:07:24AM +0100, Peter Maydell wrote:
> On Thu, 19 Aug 2021 at 06:54, asif siddiqui <asifsiddiqui120@gmail.com> wrote:
> >
> > Hello All,
> >
> > We are using xlnx-zcu102 machine and following command to boot the QNX OS as guest on top of QEMU with WIndows as HOST OS.
> >
> > QEMU Command to boot QNX Image-
> > qemu-system-aarch64 -M xlnx-zcu102 -m 8G -serial mon:stdio -display none -device loader,file=E:\QNX-IFS.bin,cpu-num=0
> >
> > We are working on the gptp timing. To implement the gptp time we need to enable the system tick (Xilinx-zcu102 + QNX + QEMU).
> >
> > For getting the Timer Counter's value we are trying to read Counter_Value_1 (TTC) Register as mentioned in the given link
> > https://www.xilinx.com/html_docs/registers/ug1087/ug1087-zynq-ultrascale-registers.html#ttc___counter_value_1.html
> >
> > Query -
> > How to enable the system tick in QEMU enviroment(Xilinx-zcu102 + QNX + QEMU). Do we need to configure any command line option in the QEMU command.
>
> I have cc'd the maintainers of the xlnx-zcu102 machine model,
> who will probably know.
>

Hi,

The TTC is unfortunately missing from the ZCU102 model.

Best regards,
Edgar