SeaBIOS: Difference between revisions

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'''LegacyBIOS''' is an open-source legacy BIOS implementation, which can also be used as coreboot payload.
'''SeaBIOS''' (previously known as '''LegacyBIOS''') is an open-source legacy BIOS implementation, which can also be used as coreboot payload.


== Building ==
== Building ==


=== LegacyBIOS ===
=== SeaBIOS ===


You can download the latest version of LegacyBIOS through a git repository:
You can download the latest version of SeaBIOS through a git repository:


<source lang="bash">
<source lang="bash">
$ mkdir foo
$ git clone git://git.linuxtogo.org/home/kevin/legacybios.git seabios
$ cd foo
$ cd seabios
$ git clone git://git.linuxtogo.org/home/kevin/legacybios.git legacybios
$ cd legacybios
</source>
</source>


Alternatively, the released versions of LegacyBIOS can be found at http://linuxtogo.org/~kevin/legacybios/.  
Alternatively, the released versions of SeaBIOS can be found at http://linuxtogo.org/~kevin/legacybios/.  


Edit '''src/config.h''' and set the following values:
Edit '''src/config.h''' and set the following values:
Line 30: Line 28:
</source>
</source>


The final LegacyBIOS payload file is '''out/bios.bin.elf''', which can be used with coreboot v2 or v3.
The final SeaBIOS payload file is '''out/bios.bin.elf''', which can be used with coreboot v2 or v3.


=== coreboot ===
=== coreboot ===


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


$ cd ..
<source lang="bash">
$ svn co svn://coreboot.org/repository/coreboot-v3
$ cd ..
$ cp legacybios/out/bios.bin.elf coreboot-v3/payload.elf
$ svn co svn://coreboot.org/repository/coreboot-v3
$ cd coreboot-v3
$ cp seabios/out/bios.bin.elf coreboot-v3/payload.elf
$ make menuconfig
$ cd coreboot-v3
$ make menuconfig
</source>


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:
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
<source lang="bash">
$ make
</source>


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


== Running LegacyBIOS in QEMU ==
== Running SeaBIOS in QEMU ==


For running coreboot+LegacyBIOS in QEMU, you need a patched version of '''vgabios-cirrus.bin''' in your '''build''' directory first:
For running coreboot+SeaBIOS in QEMU, you need a patched version of '''vgabios-cirrus.bin''' in your '''build''' directory first:


$ cd build
<source lang="bash">
$ wget http://www.coreboot.org/images/0/0d/Vgabios-cirrus.zip
$ cd build
$ unzip Vgabios-cirrus.zip
$ wget http://www.coreboot.org/images/0/0d/Vgabios-cirrus.zip
$ cd ..
$ unzip Vgabios-cirrus.zip
$ cd ..
</source>


You can now run LegacyBIOS in QEMU:
You can now run LegacyBIOS in QEMU:


$ qemu -L build -hda /dev/zero -serial stdio
<source lang="bash">
$ qemu -L build -hda /dev/zero -serial stdio
</source>


== Ready-made LegacyBIOS QEMU image ==
== Ready-made LegacyBIOS QEMU image ==

Revision as of 00:10, 4 July 2008

SeaBIOS (previously known as LegacyBIOS) is an open-source legacy BIOS implementation, which can also be used as coreboot payload.

Building

SeaBIOS

You can download the latest version of SeaBIOS through a git repository:

<source lang="bash"> $ git clone git://git.linuxtogo.org/home/kevin/legacybios.git seabios $ cd seabios </source>

Alternatively, the released versions of SeaBIOS can be found at http://linuxtogo.org/~kevin/legacybios/.

Edit src/config.h and set the following values:

<source lang="C">

  1. define CONFIG_COREBOOT 1
  2. define CONFIG_DEBUG_SERIAL 1
  3. define CONFIG_PCIBIOS 0

</source>

Then:

<source lang="bash"> $ make AVOIDCOMBINE=1 </source>

The final SeaBIOS payload file is out/bios.bin.elf, which can be used with coreboot v2 or v3.

coreboot

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

<source lang="bash"> $ cd .. $ svn co svn://coreboot.org/repository/coreboot-v3 $ cp seabios/out/bios.bin.elf coreboot-v3/payload.elf $ cd coreboot-v3 $ make menuconfig </source>

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:

<source lang="bash"> $ make </source>

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

Running SeaBIOS in QEMU

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

<source lang="bash"> $ cd build $ wget http://www.coreboot.org/images/0/0d/Vgabios-cirrus.zip $ unzip Vgabios-cirrus.zip $ cd .. </source>

You can now run LegacyBIOS in QEMU:

<source lang="bash"> $ qemu -L build -hda /dev/zero -serial stdio </source>

Ready-made LegacyBIOS QEMU image

TODO

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