Coreinfo

coreinfo is a small informational payload for coreboot. Currently, it can display CPU information, PCI information, coreboot table information, and show an NVRAM dump.

Screenshots

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  CPU info

• 

  PCI info

• 

  coreboot table

• 

  NVRAM dump

Building coreinfo

libpayload

The coreinfo payload uses libpayload, thus you need to get that first and build it:

$ mkdir foo
$ cd foo
$ svn co svn://coreboot.org/repos/trunk/payloads/libpayload
$ cd libpayload
$ make menuconfig
$ make

coreinfo

You can then get coreinfo itself and build it:

$ cd ..
$ svn co svn://coreboot.org/repos/trunk/payloads/coreinfo
$ cd coreinfo
$ make menuconfig
$ make

The file build/coreinfo.elf is your final coreinfo payload which you can use with coreboot (v2 or v3), either on real hardware or in a QEMU image.

coreboot

Finally, you have to build coreboot (v3 in this example) with coreinfo as payload:

$ cd ..
$ svn co svn://coreboot.org/repository/coreboot-v3
$ cp coreinfo/build/coreinfo.elf coreboot-v3/payload.elf
$ cd coreboot-v3
$ make menuconfig

Now enter the Payload menu and select Payload type and then An ELF executable payload file. Now exit the menu, save your settings, and build coreboot:

$ make

The file build/coreboot.rom (or build/bios.bin) is your final coreboot v3 image, which also contains the coreinfo payload.

Running coreinfo in QEMU

For running coreboot+coreinfo image in QEMU, but you need a patched version of vgabios-cirrus.bin in your build directory first:

$ cd build
$ wget http://www.coreboot.org/images/0/0d/Vgabios-cirrus.zip
$ unzip Vgabios-cirrus.zip
$ cd ..

You can now run coreinfo in QEMU:

$ qemu -L build -hda /dev/zero -serial stdio

Ready-made coreinfo QEMU image

If you don't want to build libpayload, coreinfo, and coreboot from source, you can also use the ready-made coreinfo QEMU image by following the instructions on that page.

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