Compiling Firmware

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The following steps can be used to compile and update the firmware on Talos™ II-based solutions. It's maintained by both Raptor CS and community members.


  • At least 25GB of free hard drive space
  • 16GB of free RAM

Operating System

The build system (op-build) has been primarily tested using Debian stretch. If you are on a different operating system such as Fedora 28, a Debian chroot should be used:

sudo yum install debootstrap dpkg
sudo debootstrap stretch debian-chroot

Enter the chroot and install the needed packages:

sudo chroot debian-chroot/
apt-get install software-properties-common locales
apt-get install cscope ctags libz-dev libexpat-dev \
          python texinfo \
          build-essential g++ git bison flex unzip \
          libssl-dev libxml-simple-perl libxml-sax-perl libxml2-dev libxml2-utils xsltproc \
          wget bc

Create a chroot user:

useradd -m build-user -s /bin/bash
su build-user

You can now use the chroot to build the firmware.

To enter the chroot in the future, you can run the following from a regular terminal:

sudo chroot debian-chroot/
su build-user

Grabbing the sources

Raptor CS maintains a public git repository containing the complete source code for the firmware. To download the source code:

git clone --recursive

Building the firmware

Before building the firmware, all needed support packages must be installed. Please see the file for directions on installing the needed packages.

Once the packages are installed, the firmware can be build using the following commands:

cd talos-op-build
. op-build-env
op-build talos_defconfig

To rebuild an individual package (such as hostboot) and recreate the pnor image, the following can be run:

op-build hostboot-rebuild openpower-pnor-rebuild

Updating the firmware

Copy the firmware to the BMC

scp ./output/images/talos.pnor root@<talos-openbmc>:/tmp/

At this point, you should connect two SSH sessions to OpenBMC. In the first session, run the following to display the console during bootup:

ssh root@<talos-openbmc> obmc-console-client

The console log will be useful in debugging any issues with the firmware that could occur.

In the second BMC session, ensure the system is off by running obmcutil. You should see the following:

ssh root@<talos-openbmc>
root@talos:~# obmcutil state
CurrentBMCState     : xyz.openbmc_project.State.BMC.BMCState.Ready
CurrentPowerState   : xyz.openbmc_project.State.Chassis.PowerState.Off
CurrentHostState    : xyz.openbmc_project.State.Host.HostState.Off

The CurrentHostState must be Off before continuing with the procedure. If the CurrentHostState is not Off, please turn off the machine:

obmcutil chassisoff

Once off, perform the update:

pflash -E -p /tmp/talos.pnor

Start the machine:

obmcutil poweron

Note: the machine may reboot multiple times after the initial flash.



If you see the following message reported in the console, then the SBE update process did not work as expected:

 16.74709|Error reported by sbe (0x2200) PLID 0x90000008
 16.74823|  SBE Image Version Miscompare with Master Target
 16.74824|  ModuleId   0x0d SBE_MASTER_VERSION_COMPARE
 16.74825|  ReasonCode 0x2215 SBE_MASTER_VERSION_DOWNLEVEL
 16.74826|  UserData1  Master Target HUID : 0x0000000000050000
 16.74826|  UserData2  Master Target Loop Index : 0x0000000000000000

The machine needs to be reset to finish the update proceedure using the following:

obmcutil chassisoff
systemctl stop xyz.openbmc_project.State.Host.service
systemctl start xyz.openbmc_project.State.Host.service
obmcutil poweron

The update should now complete as expected.

A bug report is open[1] to track this issue.

internal compiler error: Killed

Building the hostboot source code requires a large amount of ram. If your machine runs out, you may see an error similar ot the following:

powerpc64le-buildroot-linux-gnu-g++.br_real: internal compiler error: Killed (program cc1plus)

To continue you have a few options:

  • Reduce the number of parallel jobs being run by appending -j<num> to you build command line
op-build -j4
  • Increase the swap space
  • Install additional RAM