[PATCH rtems-libbsd] rtemsbsd: Use a separate header for test devices

[Kinsey Moore]

On 7/6/2021 21:20, Chris Johns wrote:
> On 7/7/21 12:03 pm, Kinsey Moore wrote:
>> On 7/6/2021 20:57, Chris Johns wrote:
>>> On 7/7/21 11:05 am, Kinsey Moore wrote:
>>>> The need for the difference on ZynqMP is that there are 4 different CGEM
>>>> interfaces of which dev boards primarily make use of CGEM3.
>>> RTEMS_BSD_DRIVER_XILINX_ZYNQMP_CGEM0(ZYNQMP_IRQ_ETHERNET_0);
>>> RTEMS_BSD_DRIVER_XILINX_ZYNQMP_CGEM1(ZYNQMP_IRQ_ETHERNET_1);
>>> RTEMS_BSD_DRIVER_XILINX_ZYNQMP_CGEM2(ZYNQMP_IRQ_ETHERNET_2);
>>> RTEMS_BSD_DRIVER_XILINX_ZYNQMP_CGEM3(ZYNQMP_IRQ_ETHERNET_3);
>>>
>>> ?
>> Yes, this does technically work
> Hmm, I suggest this is what we should support as a default.
>
>> if you can read the shell output past the log
>> spam. The other interfaces trying and failing to come up throw a gargantuan
>> amount of messages to the console.
> Why do these interfaces fail to initialise? What are the errors?
>
> The removed probe check is based around FDT and so I suspect is the reason
> Sebastian suggested FDT support. Needing FDT support would break existing Zynq
> users.

The devices themselves are detected just fine and are likely 
operational. The MII busses are probably unterminated or pulled high/low 
which yields a ukphy detection on every available slot and constant PHY 
read/write timeouts. A small sample from enabling both CGEM2 and CGEM3 
on this custom board:

ukphy13:  none, 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, 
100baseT4, 1000baseSX, 1000baseSX-FDX, 1000baseT, 1000baseT-master, 
1000baseT-FDX, 1000baseT-FDX-master, auto
cgem3: phy read timeout: 0
ukphy14: <Generic IEEE 802.3u media interface> PHY 14 on miibus0
cgem3: phy write timeout: 0
cgem3: phy read timeout: 0
cgem3: phy read timeout: 0
cgem3: phy read timeout: 0
cgem3: phy read timeout: 0
cgem3: phy read timeout: 0
cgem3: phy read timeout: 0

...

cgem3: phy read timeout: 0

This type of output reached ukphy31 before I was able to run the 
shutdown command with 50+ PHY read/write errors and more continuing 
afterward. I imagine it's worse if I enable all 4 interfaces.


Kinsey