2020-04-19 10:39:23 +02:00
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OLPC XO Laptops
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===============
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This document explains how to build and run images that run on the OLPC
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XO laptops.
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Supported models
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* OLPC XO-1
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The original NS Geode based OLPC laptop, uses the x86 architecture.
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* OLPC XO-7.5
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The ARM-based laptop. Needs a recent enough firmware to provide a good
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enough flattened device tree to the kernel.
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Configure and build
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===================
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$ make olpc_xo1_defconfig # Configure for XO-1
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or:
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$ make olpc_xo175_defconfig # Configure for XO-1.75
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Then:
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$ make menuconfig # Customize the build configuration
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$ make # Build
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Preparing the machine
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=====================
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Firmware security
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-----------------
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Most OLPC machines were shipped with the security system that disallows
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booting unsigned software. If this is the case with your machine, in order
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to run the image you've built on it you'll need to get a developer key and
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deactivate the security system.
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The procedure is descriped in the OLPC wiki:
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http://wiki.laptop.org/go/Activation_and_Developer_Keys
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Firmware upgrade
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----------------
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It is always preferrable to use an up to date firmware. The firmware images
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are available at http://wiki.laptop.org/go/Firmware. For the XO-1.75 laptop
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to boot the mainline kernel a firmware Q4E00JA or newer is needed. You can
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get it at http://dev.laptop.org/~quozl/q4e00ja.rom.
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To update the firmware, place the .rom file on to your bootable media,
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connect a charged battery pack and a wall adapter, and enter the Open
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Firmware prompt by pressing ESC during the early boot (needs an unlocked
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laptop -- see "Firmware security" above). Then use the "flash" command
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to update the firmware:
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ok flash ext:\q4e00ja.rom \ Flash the "q4e00ja.rom" from the SD card
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ok flash u:\q4e00ja.rom \ Flash the "q4e00ja.rom" from USB stick
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2020-06-17 12:49:22 +02:00
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Create the bootable media
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=========================
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When the build is finished, the resulting image file will be called
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"sdcard.img". It can be written directly to a SD-card or and USB flash stick.
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Please double check that you're using the right device (e.g. with "lsblk"
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command). Doing the following will DESTROY ALL DATA that's currently on the
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media.
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# cat output/images/sdcard.img >/dev/<device>
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2020-04-19 10:39:23 +02:00
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Booting the machine
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===================
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Once your machine is unlocked, it will automatically boot from your media
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wherever it will detect it attached to the USB bus or the SD card slot.
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