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Revision as of 00:16, 18 April 2008 by Uwe (talk | contribs) (Memtest86 build instructions.)
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Documentation is now handled by the same processes we use for code: Add something to the Documentation/ directory in the coreboot repo, and it will be rendered to Contributions welcome!

The Memtest86 payload.

Memtest86 is a program which checks your RAM modules.

It can be run from within GRUB, but also as a coreboot payload (i.e. included in your ROM chip).



$ mkdir foo
$ cd foo
$ wget
$ tar xfvz memtest86-3.4.tar.gz
$ cd memtest86-3.4

(Optional: edit config.h and set #define SERIAL_CONSOLE_DEFAULT 1 for serial support)

$ make

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


Finally, you have to build coreboot (v3 in this example) with Memtest86 as payload:

$ cd ..
$ svn co svn://
$ cp memtest86-3.4/memtest 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 payload.

Running Memtest86 in QEMU

For running the coreboot+Memtest86 image in QEMU, you need a patched version of vgabios-cirrus.bin in your build directory first:

$ cd build
$ wget
$ unzip
$ cd ..

You can now run coreboot and Memtest86 in QEMU:

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

Ready-made QEMU image

Please follow [ these instructions] if you want to try out coreboot and Memtest86 in QEMU.

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