0f6f42636b
This adds some instructions on how to build and run images for the OLPC XO laptops. Signed-off-by: Lubomir Rintel <lkundrak@v3.sk> Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
79 lines
2.4 KiB
Plaintext
79 lines
2.4 KiB
Plaintext
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.
|