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Denis 'GNUtoo' Carikli
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Since we now have a very visible banner that indicates which pages have been not been reviewed, and contribution instructions on how to fix that, we are ready to publish the website. Right now the deploy path of the website isn't configurable as this would require some form of templating or processing of the markdown files, so the website was simply moved from gnu.org/software/gnuboot/test to gnu.org/software/gnuboot. Signed-off-by: Denis 'GNUtoo' Carikli <GNUtoo@cyberdimension.org> Acked-by: Adrien 'neox' Bourmault <neox@gnu.org>
62 lines
2.2 KiB
Markdown
62 lines
2.2 KiB
Markdown
---
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title: GA-G41M-ES2L flashing tutorial
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...
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This guide is for those who want libreboot on their Intel GA-G41M-ES2L
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motherboard while they still have the original BIOS present.
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Flash chip size {#flashchips}
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===============
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Use this to find out:
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flashrom -p internal
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Flashing instructions {#clip}
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=====================
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Refer to [spi.md](spi.md) for how to set up an SPI programmer for
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external flashing. *You can only externally reprogram one of the chips
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at a time, and you need to disable the chip that you're not flashing,
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by connecting 3v3 to /CS of that chip, so you will actually need second test
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clip or IC pin mini grabber.*
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NOTE: on GA-G41M-ES2L, the flash shares a common voltage plane with the
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southbridge, which draws a lot of current. This will cause under-voltage on
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most SPI flashers, so do not use the 3.3V rail from your flasher. Do not
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connect +3.3V to the chip. Instead, turn the board on and then turn it off by
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holding the power button. With the board powered down, but plugged in, there
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will be a 3.3V supply from the ATX PSU. You can then flash, but DO NOT connect
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the +3.3V supply from your SPI flasher!
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NOTE: You should use a resistor in series, between 1K to 10K ohms, for the 3.3v
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connection to the CS pin. This is to protect from over-current.
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Here is an image of the flash chip:\
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Internal flashing is possible. Boot with the proprietary BIOS and
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GNU+Linux. There are 2 flash chips (one is backup).
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Flash the first chip:
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./flashrom -p internal:dualbiosindex=0 -w libreboot.rom
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Flash the second chip:
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./flashrom -p internal:dualbiosindex=1 -w libreboot.rom
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NOTE: you can still boot the system with just the main flash chip
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connected, after desoldering the backup chip. This has been tested while
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libreboot was already installed onto the main chip.
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NOTE: If you don't flash both chips, the recovery program from the default
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factory BIOS will kick in and your board will be soft bricked. Make sure that
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you flash both chips!
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NOTE: You need the latest flashrom. Just get it on flashrom.org from
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their SVN or Git repos.
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NOTE: due to a bug in the hardware, the MAC address is hardcoded in
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coreboot-libre. Therefore, you must set your own MAC address in your
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operating system.
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