thank you for your response, i understood your second option but I somewhat haven't understood your first option. isn't the code written for the ultra96 BSP already meant to be 32-bit? would you give me a further explanation?
On Thu, Apr 22, 2021 at 8:29 PM Kinsey Moore <kinsey.mo...@oarcorp.com> wrote: > On 4/22/2021 08:47, Alireza Banejad wrote: > > Hello > > I want to know could I run applications for the ultra96 bsp in qemu? > > I tried the qemu-system-arm with the virt machine and cpu specified as > > cortex-a7 yet I don't get anything > > I also tried the qemu-system-aarch64 specifying the machine as > > xlnx-zcu102 and it still couldn't run the application. > > BTW the application is just the hello sample from the testsuite > > In reality I actually could run applications that were built with the > > xilinx_zynqmp_ultra96 on a actual zcu102 board > > But I don't understand why this doesn't happen in qemu > > I don't have the board right now that why I need to test my > > applications in qemu > > Long story short, how can I run my applications built for > > xilinx_zynqmp_ultra96 in qemu?? > > > The issue that you're having is that the ARM xilinx_zynqmp_ultra96 BSP > is designed to run on the Ultrascale+ ZynqMP chip in 32-bit mode instead > of 64-bit mode. qemu-system-aarch64 is the correct QEMU to use, but it > starts in EL1/AArch64 mode by default. I haven't seen a way to directly > start AArch32/ARMv7 code on the virtualized Cortex-A53 CPU, but on real > hardware it would be controlled by the AA64nAA32 signal line. From what > I can find, similar discussions have happened around the Raspberry Pi > platform and as of 2019 there was no way to configure direct boot to > AArch32. > > Two viable options: > > Write a piece of shim code to drop from EL1 to 32-bit mode based on the > ARMv8 bare metal boot code (what you need is there, almost verbatim). > > Recompile QEMU to get the functionality you want (the relevant code is > in hw/arm/boot.c, look for EM_AARCH64). > > > Kinsey > > _______________________________________________ > devel mailing list > devel@rtems.org > http://lists.rtems.org/mailman/listinfo/devel >
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