[PATCH rtems-libbsd] aarch64/nexus: add GEM definitions for Versal

[Gedare Bloom]

With this patch, libbsd networking is functional with
qemu-system-aarch64   -no-reboot -nographic -M xlnx-versal-virt -m
4096 -serial none -serial mon:stdio -net nic -kernel init.exe

>From what I gather, qemu is using the Cadence GEM for the
xlnx-versal-virt, although the real hw uses a slightly different GEM
IP.

Passed:        31
Failed:         3
User Input:    19
Expected Fail:  0
Indeterminate:  0
Benchmark:      0
Timeout:        2
Test too long:  0
Invalid:        0
Wrong Version:  0
Wrong Build:    0
Wrong Tools:    0
-----------------
Total:         55
Failures:
 ping01.exe
 pf01.exe
 commands01.exe

commands01.exe works manually.

I also confirmed with a telnet application that I can open a remote
connection to the simulated target.

On Fri, Jun 25, 2021 at 12:45 PM Gedare Bloom <gedare at rtems.org> wrote:
>
> ---
>  rtemsbsd/include/bsp/nexus-devices.h           |  7 +++++++
>  rtemsbsd/include/machine/rtems-bsd-nexus-bus.h | 11 +++++++++++
>  2 files changed, 18 insertions(+)
>
> diff --git a/rtemsbsd/include/bsp/nexus-devices.h b/rtemsbsd/include/bsp/nexus-devices.h
> index efe4fcb4..e6487470 100644
> --- a/rtemsbsd/include/bsp/nexus-devices.h
> +++ b/rtemsbsd/include/bsp/nexus-devices.h
> @@ -115,6 +115,13 @@ RTEMS_BSD_DRIVER_E1000PHY;
>  RTEMS_BSD_DRIVER_XILINX_ZYNQMP_CGEM0(ZYNQMP_IRQ_ETHERNET_0);
>  RTEMS_BSD_DRIVER_E1000PHY;
>
> +#elif defined(LIBBSP_AARCH64_XILINX_VERSAL_BSP_H)
> +
> +#include <bsp/irq.h>
> +
> +RTEMS_BSD_DRIVER_XILINX_VERSAL_GEM0(VERSAL_IRQ_ETHERNET_0);
> +RTEMS_BSD_DRIVER_E1000PHY;
> +
>  #elif defined(LIBBSP_ARM_ATSAM_BSP_H)
>
>  RTEMS_BSD_DRIVER_USB;
> diff --git a/rtemsbsd/include/machine/rtems-bsd-nexus-bus.h b/rtemsbsd/include/machine/rtems-bsd-nexus-bus.h
> index 5902c58c..2c013ef3 100644
> --- a/rtemsbsd/include/machine/rtems-bsd-nexus-bus.h
> +++ b/rtemsbsd/include/machine/rtems-bsd-nexus-bus.h
> @@ -409,6 +409,17 @@ extern "C" {
>    #define RTEMS_BSD_DRIVER_XILINX_ZYNQMP_CGEM3(_irq)       \
>      RTEMS_BSD_DRIVER_XILINX_ZYNQ_CGEM(3, 0xff0e0000, _irq)
>  #endif /* RTEMS_BSD_DRIVER_XILINX_ZYNQMP_CGEM3 */
> +/*
> + * Versal has a similar GEM as the CGEM. This should work for now.
> + */
> +#if !defined(RTEMS_BSD_DRIVER_XILINX_VERSAL_GEM0)
> +  #define RTEMS_BSD_DRIVER_XILINX_VERSAL_GEM0(_irq)                \
> +    RTEMS_BSD_DRIVER_XILINX_ZYNQ_GEM(0, 0xff0c0000, _irq)
> +#endif /* RTEMS_BSD_DRIVER_XILINX_VERSAL_GEM0 */
> +#if !defined(RTEMS_BSD_DRIVER_XILINX_VERSAL_GEM1)
> +  #define RTEMS_BSD_DRIVER_XILINX_VERSAL_GEM1(_irq)       \
> +    RTEMS_BSD_DRIVER_XILINX_ZYNQ_GEM(1, 0xff0d0000, _irq)
> +#endif /* RTEMS_BSD_DRIVER_XILINX_VERSAL_GEM1 */
>
>  /*
>   * Designware/Synopsys Ethernet MAC Controller.
> --
> 2.25.1
>