Re: Enabling boot menu via serial & PXE boot in CorebootPayloadPkg

["You, Benjamin" <benjamin.you@intel.com>]

Hi Cameron,

BTW, please use debug build for Coreboot Payload, such that debug
information can be shown in serial console from the very early stage in the
Payload's execution. This would help validating the functioning of serial.

Thanks,

- ben

> -----Original Message-----
> From: edk2-devel [mailto:edk2-devel-bounces@lists.01.org] On Behalf Of You,
> Benjamin
> Sent: Saturday, November 25, 2017 11:25 PM
> To: Cameron Craig <Cameron.Craig@exterity.com>; 'edk2-devel@lists.01.org'
> <edk2-devel@lists.01.org>
> Subject: Re: [edk2] Enabling boot menu via serial & PXE boot in
> CorebootPayloadPkg
> 
> Hi Cameron,
> 
> CorebootPayloadPkg does support serial output as user interface. To enable
> serial, the CorebootPayloadPkg retrieves serial information from Coreboot
> through CorebootModulePkg\Library\CbParseLib\CbParseLib.c =>
> CbParseSerialInfo(), which is called by CorebootPayloadPkg\Library\
> PlatformHookLib\PlatformHookLib.c => PlatformHookSerialPortInitialize(),
> which is in turn called by CorebootModulePkg\Library\BaseSerialPortLib16550
> \BaseSerialPortLib16550.c ==> SerialPortInitialize().
> 
> Have you seen serial output info during Coreboot? If the answer is no, then
> Coreboot should be tweaked. If the answer is yes, but you cannot see serial
> output in Coreboot Payload, then probably the above call sequence needs to
> be checked. If you do not have a debugger, one way to trace code flow is to
> insert raw serial outputs in the code flow. This should be doable since
> Coreboot already does serial output. Once the serial output functions
> correctly in the Coreboot Payload, Boot Menu / UI through serial should be
> automatically supported.
> 
> On networking, you might refer to the Minnow Board v3 source tree, at
> https://github.com/tianocore/edk2-platforms/tree/devel-MinnowBoard3-
> UDK2017
> 
> Minnow Board v3 uses the same SOC as Leaf Hill. You might look at
> Platform/BroxtonPlatformPkg/PlatformPkg.fdf file for a reference on which
> components are used for network / PXE.
> 
> Thanks,
> 
> - ben
> 
> > -----Original Message-----
> > From: edk2-devel [mailto:edk2-devel-bounces@lists.01.org] On Behalf Of
> > Cameron Craig
> > Sent: Friday, November 24, 2017 5:16 PM
> > To: 'edk2-devel@lists.01.org' <edk2-devel@lists.01.org>
> > Subject: [edk2] Enabling boot menu via serial & PXE boot in
> CorebootPayloadPkg
> >
> > Hi all,
> >
> > I'm new to this list and new to edk2 integration.
> > Currently I'm working on an Intel Leaf Hill CRB, attempting to produce a
> > coreboot payload consisting of a Tianocore EDKII UDK 2017 UEFI boot
> manager.
> >
> > I have basic functionality, but a few useful features are currently missing from
> > my build:
> >
> > 1. User interface via serial.
> > We will not have the luxury of a video output so need to be able to navigate
> the
> > boot menu etc. via serial.
> > In an ideal world I would be looking for a Boolean value to toggle :) But I
> > imagine there might be a little more to it.
> >
> > 2. PXE Boot.
> > So far I have sources and built an UNDI driver and pinged a local network
> device.
> > I have also attempted to enable the necessary features for PXE boot [1].
> > But I get an error message:
> > ```
> > $ ipconfig
> > MAC Address: <valid MAC addr>
> > Broadcast MAC: FF FF FF FF FF FF
> > ipconfig: Locate protocol error: 'PXE base code protocol'
> > ```
> > So I'm thinking some drivers are not being loaded?
> >
> > Any suggestions for enabling these features would be greatly appreciated.
> >
> > [1] https://github.com/tianocore/tianocore.github.io/wiki/NetworkPkg-
> > Getting-Started-Guide -> FEATURES ENABLING
> >
> > Cheers,
> > Cameron
> >
> >
> > Cameron Craig | Graduate Software Engineer | Exterity Limited
> > tel: +44 1383 828 250 | fax:  | mobile:
> > e: Cameron.Craig@exterity.com | w: www.exterity.com
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