[PATCH v1 0/9] Enable SMP for pc386 based bsps

[Jan.Sommer at dlr.de]

> -----Original Message-----
> From: Chris Johns [mailto:chrisj at rtems.org]
> Sent: Tuesday, June 16, 2020 10:18 AM
> To: Sommer, Jan; devel at rtems.org
> Subject: Re: [PATCH v1 0/9] Enable SMP for pc386 based bsps
> 
> On 11/6/20 12:21 pm, Chris Johns wrote:
> > On 1/6/20 12:22 am, Jan Sommer wrote:
> >> Hello,
> >>
> >> Here is a patch set which should enable SMP again for the pc386-based
> BSPs (mainly tested with pc686).
> >
> > Many thanks for these patches and your efforts.
> >
> >> So far I only tested it with qemu. Tests on real hardware are pending.
> >
> > It would be good to test results for hardware with SMP disabled. If the test
> > results do not show any regressions then I am fine with these patches for
> RTEMS
> > 5.2 with SMP documented as experimental. I will take a look at doing this.
> 
> I have finally managed to get my test PC to load a iPXE loader and with that I
> can boot RTEMS. Without the changes I can run hello.exe and it prints the
> right
> stuff on the monitor however the iPXE boot command line that use to work
> ...
> 
> chain tftp://10.10.5.2/rtems.exe --console=/dev/com1,115200
> --printk=/dev/com1,115200
> 
> ... does not generate any serial output. The output is being redirected and
> the
> serial port because nothing appears on the monitor and I tested the cable is
> working with a loop-back jumper.
> 

Sorry for the delay, we had some problems in our lab setup as well.
It is working now again and I could receive the output of ticker via the serial line.
I hope I can run the testsuites in the coming nights. Then I can respond to your other comments.

Do you have a chance to check the pins of you serial port with an Oscilloscope?
Our board allows in the BIOS to configure the serial port for different protocols (RS232 and RS422) maybe some pin mappings are not correct?

Maybe it is of any help to you. Our ipxe script looks like this:

echo Trying to receive IP-address...
dhcp || goto dhcp_failed
echo Received the following IP settings:
route
chain tftp://${net0/next-server}/ticker.exe --console=/dev/com1,115200

:dhcp_failed
echo Failed to acquire configuration via dhcp.
echo Opening shell...
shell

Best regards,

   Jan

> Is the PC serial port driver broken?
> 
> Chris