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TCS Confidential<br>
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<p class="MsoPlainText">Hi,<o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText">Thanks for guiding !!<o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText">@Jeremy:<o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText">After referring to your slides 25 and 28, it looks like it’s the Host Serial port (i.e., Serial_B Port next to the IPMB port, in BLACK colored in your slide) that’s the one I am connecting to, so it’s not the BMC Serial port then .
<o:p></o:p></p>
<p class="MsoPlainText">Thanks for pointing out.<o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText">@James:<o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText">So, for the Intel servers having “AST2500 BMC PSoC” or similar, if BMC serial port is not accessible, then how to connect to the debug console ? Do we need to access via SOL (Serial over Lan), LPC or any other methods.
<o:p></o:p></p>
<p class="MsoPlainText">How do we flash and test our image (that I want to build on QEMU) ?? Also, what are the other options I have for this board S2600GZ, as we have currently only this one where we want to test our codes etc.<o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText">Thanks a lot again,<o:p></o:p></p>
<p class="MsoPlainText">Shubh,<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><b>From:</b> James Mihm <james.mihm@gmail.com> <br>
<b>Sent:</b> Tuesday, October 11, 2022 9:32 AM<br>
<b>To:</b> Jeremy Kerr <jk@codeconstruct.com.au><br>
<b>Cc:</b> Shubhabrata Bose <shubhabrata.bose@tcs.com>; openbmc@lists.ozlabs.org<br>
<b>Subject:</b> Re: Unable to connect to a BMC Serial Console<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<h5><span style="font-size:10.5pt;color:tomato;font-weight:normal">"External email. Open with Caution"</span><o:p></o:p></h5>
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<p class="MsoNormal">Hi Shubh,<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Is your goal to replace the Intel BMC firmware stack with an OpenBMC firmware image?<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">The Intel S2600GZ server (a.k.a., Grizzly Pass) is an older server with an Emulex Pilot 2<o:p></o:p></p>
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<p class="MsoNormal">BMC PSoC with a proprietary firmware stack. Furthermore, the Pilot series of BMC is not<o:p></o:p></p>
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<p class="MsoNormal">supported by OpenBMC. Whereas the S2600STP (a.k.a., Sawtooth Pass), that Jeremy has<o:p></o:p></p>
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<p class="MsoNormal">referenced, has the AST2500 BMC PSoC and is supported by OpenBMC.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">To make things more challenging for hackers, Intel platforms don't have the BMC serial port<o:p></o:p></p>
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<p class="MsoNormal">normally accessible. Meaning that the hardware to connect to the BMC serial port isn't <o:p></o:p></p>
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<p class="MsoNormal">populated and logging into the BMC via the serial console is disabled.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Regards, James.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">On Mon, Oct 10, 2022 at 6:16 PM Jeremy Kerr <<a href="mailto:jk@codeconstruct.com.au">jk@codeconstruct.com.au</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt">Hi Shubh,<br>
<br>
> TCS Confidential<br>
<br>
Really? :)<br>
<br>
> I am new to OpenBMC and I need some help about how to access the BMC<br>
> console which I am not able to, after many tries.<br>
<br>
Just to confirm - you're referring to the console for the BMC system<br>
itself, right? As distinct from the host serial.<br>
<br>
> Currently, I have connected my Host Server (i.e., Thinkstation P510 –<br>
> Intel X86-64 CPU installed with OS: Ubuntu 18.04)<br>
> with Intel Server Board S2600GZ (OS :Ubuntu 14) which has a BMC chip<br>
> using aUSB-TTL Serial console cable <br>
> (“xcluma Usb To Ttl Serial Cable Debugger For Raspberry Pi Beaglebone<br>
> Cubietruck”.)<br>
> The minicom is not showing me any prompt & it’s paused; nothing is<br>
> going ahead.<br>
<br>
A few things to check:<br>
<br>
- Where have you attached to the TTL signals? Are you sure that's a <br>
BMC serial port?<br>
- What are you expecting to see there? The BMC might only be <br>
outputting console data during boot.<br>
- Are you using the correct baud rate? (since there should be <br>
activity on the TX line during boot, you can use this to find the <br>
TX line and set your baud rate)<br>
<br>
I'm not familiar with the S2600GZ, but I have done a bit of OpenBMC<br>
development using a S2600STB platform, which may be similar. In that<br>
case, slides 25 and 28 of this might help:<br>
<br>
<a href="http://jk.ozlabs.org/docs/lca2021/lca2021%20-%20Server%20platforms%20-%20Jeremy%20Kerr.pdf" target="_blank">http://jk.ozlabs.org/docs/lca2021/lca2021%20-%20Server%20platforms%20-%20Jeremy%20Kerr.pdf</a><br>
<br>
Otherwise, maybe Intel folks here can provide better connection details<br>
for the GZ.<br>
<br>
Cheers,<br>
<br>
<br>
Jeremy<o:p></o:p></p>
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