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751a13618a
This makes the boot script set appropriate root parameters when it's loaded from a NAND flash device. Signed-off-by: Lubomir Rintel <lkundrak@v3.sk> Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com> |
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| xo-1 | ||
| xo-1.75 | ||
| genimage.cfg | ||
| linux.config | ||
| olpc.fth | ||
| post-build.sh | ||
| readme.txt | ||
OLPC XO Laptops =============== This document explains how to build and run images that run on the OLPC XO laptops. Supported models ---------------- * OLPC XO-1 The original NS Geode based OLPC laptop, uses the x86 architecture. * OLPC XO-7.5 The ARM-based laptop. Needs a recent enough firmware to provide a good enough flattened device tree to the kernel. Configure and build =================== $ make olpc_xo1_defconfig # Configure for XO-1 or: $ make olpc_xo175_defconfig # Configure for XO-1.75 Then: $ make menuconfig # Customize the build configuration $ make # Build Create the bootable media ========================= When the build is finished, the resulting image file will be called "sdcard.img". It can be written directly to a SD-card or and USB flash stick. Please double check that you're using the right device (e.g. with "lsblk" command). Doing the following will DESTROY ALL DATA that's currently on the media. # cat output/images/sdcard.img >/dev/<device> Preparing the machine ===================== Firmware security ----------------- Most OLPC machines were shipped with the security system that disallows booting unsigned software. If this is the case with your machine, in order to run the image you've built on it you'll need to get a developer key and deactivate the security system. The procedure is descriped in the OLPC wiki: http://wiki.laptop.org/go/Activation_and_Developer_Keys Firmware upgrade ---------------- It is always preferrable to use an up to date firmware. The firmware images are available at http://wiki.laptop.org/go/Firmware. For the XO-1.75 laptop to boot the mainline kernel a firmware Q4E00JA or newer is needed. You can get it at http://dev.laptop.org/~quozl/q4e00ja.rom. To update the firmware, place the .rom file on to your bootable media, connect a charged battery pack and a wall adapter, and enter the Open Firmware prompt by pressing ESC during the early boot (needs an unlocked laptop -- see "Firmware security" above). Then use the "flash" command to update the firmware: ok flash ext:\q4e00ja.rom \ Flash the "q4e00ja.rom" from the SD card ok flash u:\q4e00ja.rom \ Flash the "q4e00ja.rom" from USB stick Booting the machine =================== Once your machine is unlocked, it will automatically boot from your media wherever it will detect it attached to the USB bus or the SD card slot.