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@ -19,7 +19,7 @@ That's the preferred way to use coreboot. The git revision we use is always incl |
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## table of contents |
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* [TL;DR](#tl-dr) |
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* [Flashing for the first time](#flashing-for-the-first-time) |
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* [How to update](#how-to-update) |
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* [How to flash](#how-to-flash) |
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* [Why does this work](#why-does-this-work) |
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## TL;DR |
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@ -149,27 +149,23 @@ the following included script: |
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That's it. Keep the backup safe. |
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## How to update |
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When __upgrading__ to a new release, only the "upper" 4MB chip has to be written. |
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Download the latest release image we provide and flash it: |
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## How to flash |
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When __upgrading__ to a new release, only the "upper" 4MB chip has to be written |
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and any of the following examples are possible. Otherwise you cannot use |
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"internal" flashing and please read [flashing for the first time](#flashing-for-the-first-time). |
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### Example: internal |
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CAUTION: THIS IS NOT ENCOURAGED |
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* Only for _updating_! You have to have your 8MB chip flashed externally using |
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our `flashrom_rpi_bottom_unlock.sh` script (`ifdtool -u`) before this, once |
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* very convenient: just install flashrom on the X230 and software-update, |
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but according to the |
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* very convenient: just install flashrom on your X230 but according to the |
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[flashrom manpage](https://manpages.debian.org/stretch/flashrom/flashrom.8.en.html) |
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this is very dangerous! |
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* Boot Linux with the `iomem=relaxed` boot parameter (for example set in /etc/default/grub) |
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* download the latest release tarball (4MB "top" BIOS image is included) and extract it |
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* run `prepare_internal_flashing.sh` for generating all necessary files and printing all instructions |
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* run the flashrom command you got from the script. That's it. |
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* run `prepare_internal_flashing.sh` for generating all necessary files and instructions |
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### Example: Raspberry Pi 3 |
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Here you'll flash externally, using a "Pomona 5250 8-pin SOIC test clip". You'll find |
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one easily. This is how the X230's SPI connection looks on both chips: |
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Martin Kepplinger
6 years ago