diff options
author | Christian Franke <nobody@nowhere.ws> | 2016-03-08 00:00:23 +0100 |
---|---|---|
committer | Christian Franke <nobody@nowhere.ws> | 2016-03-08 00:00:23 +0100 |
commit | 3b3b5df6ec23af05519075fc32a784716f4479dd (patch) | |
tree | 5712f1857a2d7af78d9b8c0a156f5c199e67b7c4 /coreboot-x201.mdwn | |
parent | cf5f1ab0af3ab5d502d351da76d9030b8a70efa8 (diff) |
Reorganisation
Diffstat (limited to 'coreboot-x201.mdwn')
-rw-r--r-- | coreboot-x201.mdwn | 79 |
1 files changed, 0 insertions, 79 deletions
diff --git a/coreboot-x201.mdwn b/coreboot-x201.mdwn deleted file mode 100644 index df87846..0000000 --- a/coreboot-x201.mdwn +++ /dev/null @@ -1,79 +0,0 @@ -[[!img coreboot.png align="right" alt="coreboot logo"]] - -## n00bie guide for getting [[coreboot|http://www.coreboot.org/Welcome_to_coreboot]] to a x201{i/s/t} - -###why would I want this? -- prevent [[badBIOS|https://www.schneier.com/blog/archives/2013/11/badbios.html]] -- free open source BIOS / EFI implementation -- fast (faster than Lenovo BIOS) -- no PCI ID whitelist restrictions (WiFi / WWAN) -- you can boot even with SATA-password set (for example to change/delete it with hdparm) -- hotswap harddrive (didn't test, but should work) -- it's cool. - -###okay, show me how! -#### preliminary actions -first you should update your existing BIOS. This is important as you cannot update your [[ECP|http://www.thinkwiki.org/wiki/Embedded_Controller_Firmware]] version afterwards. Linux users can use the ISO files provided by Lenovo and do some nice trick described [[here|http://www.thinkwiki.org/wiki/BIOS_update_without_optical_disk]] - -It is also advisable to save the output of dmidecode somewhere, as you need specific BIOS versions strings to get thinkpad_acpi to work. - -next buy or build a SPI flasher and get a SOIC8 clip for mounting the chip correctly. - -#### the ugly part -you have to dump the existing BIOS using [[flashrom|http://www.flashrom.org]] and an external SPI flasher. -here's the pinout: -[[!format bash """ - ==== front (display) ===== -3.3V N/C CLK MOSI - | | | | - | | | | -CS MISO N/C ground - ==== back (touchpad) ===== -"""]] - -[[!img bus_pirate.jpg align="right" size="" alt="buspirate attached"]] -Now it should look similar to this: - -You probably have to adjust your contacts quite often for it to work, so don't give up ;) try to keep the cables as short as possible. - - -now read your chip at least twice with - -[[!format bash """ -flashrom -p <yourprogrammer> -r flash.bin -flashrom -p <yourprogrammer> -r flash2.bin -diff flash.bin flash2.bin -"""]] - -If the files differ you have read errors --> bad: check your cables && try again. - -#### easy part -- extract descriptor / intel ME -[[!format bash """ -dd if=flash.bin of=coreboot/3rdparty/mainboard/lenovo/x201/descriptor.bin \ - count=12288 bs=1M iflag=count_bytes -dd if=flash.bin of=coreboot/3rdparty/mainboard/lenovo/x201/me.bin \ - skip=12288 count=5230592 bs=1M iflag=count_bytes,skip_bytes -"""]] -- extract vgabios.bin from BIOS (I used [[PhoenixTool|http://forums.mydigitallife.info/threads/13194-Tool-to-Insert-Replace-SLIC-in-Phoenix-Insyde-Dell-EFI-BIOSes]] in a WinBitch VM for this, as the included bios extractor from coreboot didn't work for me) -- hint [[SWIM|http://www.urbandictionary.com/define.php?term=swim]] [[uploaded|http://www.datafilehost.com/d/4c01e3d8]] [[it|http://rghost.net/55012997]] [[somewhere|http://fbx.ro/sseikovp02nh3ds2]] in the internets -- use your prior version number for local version string (e.g [["6QET70WW (1.40)"|http://www.thinkwiki.org/wiki/List_of_DMI_IDs]]) -- at least UNCHECK fake IFD and specify paths to descriptor / ME -- select SeaBIOS as payload -- DO NOT FORGET vgabios.bin -- [[compile coreboot|http://www.coreboot.org/Build_HOWTO]] (you'll need gcc-multilib and your python bin should point to python2, else create a venv) -- flash resulting ROM image with -[[!format bash """ -flashrom -c $Chip -w coreboot/build/coreboot.rom -p internal:laptop=force_I_want_a_brick """]] - -credits to Vladimir Serbinenko (coreboot developer) for answering to all my questions and fixing minor problems. - -## additional pics -[[!img chip_location.jpg alt="Chip location"]] -[[!img soic_clip.jpg alt="SOIC mount"]] -[[!img self_build_spi.jpg alt="SPI flasher"]] - -## additional links -[[Coreboot wiki page for x201|http://www.coreboot.org/Board:lenovo/x201]] -[[BIOS extract|http://www.coreboot.org/Bios_extract]] |