fix the x60/t60 flashing instructions
Signed-off-by: Leah Rowe <info@minifree.org>master
Leah Rowe
parent
ef8c2a7e59
commit
01c11b27d9
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@ -455,7 +455,7 @@ example of the push pin as a proof of concept:
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[You must flash it externally](spi.md)
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#### ThinkPad X60/X60S/X60T/T60 with Lenovo BIOS {#flashprog_lenovobios}
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#### ThinkPad X60/X60S/X60T/T60 with Lenovo BIOS {#flashrom_lenovobios}
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**WARNING: Libreboot 20231021 and likely older 2023 releases do not have the
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bootblock copied in release ROMs, so the bucts trick below will actually cause
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@ -470,9 +470,16 @@ And then do this:
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(This was fixed in Libreboot 20231101)
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**NOTE: the section below pertaining to 20160907 static binaries references
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flashrom. Libreboot recommends flashprog nowadays, but if you're using that
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utils archive, please note that it is from a time when Libreboot used
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flashrom. Use flashrom there as that's what included in those binaries.
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Libreboot does not currently document how to patch flashprog for sst/macronix
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on X60/T60, when going (in software) from lenovobios to libreboot.**
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**NOTE: This section partially relates to `utils` release archive in
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Libreboot 20160907, which contains static compiled binaries for things like
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bucts and flashprog. It will *still* work on modern distros, and thus is
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bucts and flashrom. It will *still* work on modern distros, and thus is
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still referenced here. The `flash` script in that release can be used, with
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modern Libreboot ROMs. Current Libreboot releases do not include pre-compiled
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utilities, only ROMs.**
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@ -487,7 +494,7 @@ X60 BIOS password (Lenovo): you might find info here:
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<https://bios-pw.org/>
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You can just get bucts from the libreboot project, same thing for the patched
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flashprog. In the Libreboot 20160907 release, there is a *utility* archive, which
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flashrom. In the Libreboot 20160907 release, there is a *utility* archive, which
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has statically compiled executables. They still work just fine on modern
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systems, and they can be used for this purpose.
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@ -502,12 +509,12 @@ Here are a list of targets:
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and you will run it at 115200 baud rate. agetty/fgetty in Linux can give
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you a serial console in your OS)
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Download and build flashprog, using the instructions
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on [the Git page](../../git.md), and download the `bucts` software using the
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notes on that very same page.
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You can replace Lenovo BIOS with libreboot, using flashprog running on the host
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CPU. However, there are some considerations.
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You can replace Lenovo BIOS with libreboot, using flashrom running on the host
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CPU. However, there are some considerations. NOTE: needs patching for SST
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and macronix chips, but libreboot doesn't yet do this for flashprog. You can
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use the old Libreboot 20160907 sources to get the modified flashrom instead,
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which contains this patch - and static binaries are provided, for convenience;
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they will still work, due to libs being statically linked.
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Firstly, make sure that the yellow CMOS battery is installed, and functioning
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correctly. You could check the voltage. The battery is a CR2032
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@ -518,7 +525,7 @@ load on it, which there will be. This coincell powers the real-time clock and
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CMOS memory).
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Lenovo BIOS restricts write access, but there is a weakness in it. With a
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specially patched flashprog binary, you can easily flash it but the top 64KiB
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specially patched flashrom binary, you can easily flash it but the top 64KiB
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region of the boot flash, containing your bootblock, cannot be flashed just
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yet. However, there is a register called the *Backup Control* or *BUC* register
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and in that register is a status bit called *Top Swap* or *TS*.
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@ -532,12 +539,12 @@ program referenced below.
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The libreboot ROM images already have the upper 64KiB bootblock copied to the lower
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one, so you don't have to worry about copying it yourself.
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If you build flashprog using the libreboot build system, there will be three
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If you use the Libreboot 20160907 utils archive, there will be three
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binaries:
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* `flashprog`
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* `flashprog_i945_sst`
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* `flashprog_i945_mx`
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* `flashrom`
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* `flashrom_i945_sst`
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* `flashrom_i945_mx`
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It's these last two binaries that you should use. Now compile bucts (just
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run `make` in the bucts source directory).
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@ -549,19 +556,19 @@ Run the bucts tool:
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Ensure that your CMOS battery is connected too. Now you must determine whether
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you have Macronix or SST. An X60/T60 thinkpad will have either an SST or a
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Macronix chip. The Macronix chip will have "MX" written on the chip. You will
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use `flashprog_i945_sst` for the SST chip, and `flashprog_i945_mx` for the
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use `flashrom_i945_sst` for the SST chip, and `flashrom_i945_mx` for the
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Macronix chip.
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Now run flashprog (for SST):
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Now run flashrom from the Libreboot 20160907 utils archive (for SST):
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sudo ./flashprog_i945_sst -p internal -w coreboot.rom
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sudo ./flashrom_i945_sst -p internal -w coreboot.rom
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Or Macronix:
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sudo ./flashprog_i945_mx -p internal -w coreboot.rom
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sudo ./flashrom_i945_mx -p internal -w coreboot.rom
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NOTE: you *can* just run both. One of them will succeed. It is perfectly
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harmless to run both versions of flashprog. In fact, you should do so!
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harmless to run both versions of flashrom. In fact, you should do so!
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You'll see a lot of errors. This is normal. You should see something like:
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@ -589,28 +596,36 @@ Your flash chip is in an unknown state.
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If you see this, rejoice! It means that the flash was successful. Please do not
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panic. Shut down now, and wait a few seconds, then turn back on again.
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**WARNING: if flashprog complains about `/dev/mem` access, please
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run `sudo ./bucts 0`. If flashprog is complaining about `/dev/mem`, it means
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**WARNING: if flashrom (from Libreboot 20160907 utils) complains
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about `/dev/mem` access, please
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run `sudo ./bucts 0`. If flashrom is complaining about `/dev/mem`, it means
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that you have `CONFIG_STRICT_DEVMEM` enabled in your kernel. Reboot with the
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following kernel parameter added in your bootloader: `iomem=relaxed` and try
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again with the above instructions. DO NOT continue until the above works, and
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you see the expected flashprog output as indicated above.**
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you see the expected flashrom output as indicated above.**
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If you *did* run flashprog and it failed to flash, but you set bucts to 1 and
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If you *did* run flashrom and it failed to flash, but you set bucts to 1 and
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shut down, don't worry. Just remove the yellow coin-cell battery (it's underneath
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the keyboard, connected to the mainboard), wait a minute or two, reconnect the
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coin-cell and try again from scratch. In this instance, if flashprog didn't do
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coin-cell and try again from scratch. In this instance, if flashrom didn't do
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anything, and didn't flash anything, it means you still have Lenovo BIOS but
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if bucts is set to 1, you can flush it and set it back to 0. BUC.TS is stored in
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volatile memory, powered by that CR2032 coin-cell battery.
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Assuming that everything went well:
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Switch to flashprog now! (avoid flashrom)
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---------------------------------------
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Flash the ROM for a second time. For this second flashing attempt, the upper
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64KiB bootblock is now read-write. Use the *unpatched* flashprog binary:
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sudo ./flashprog -p internal -w libreboot.rom
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NOTE: At this point, we recommend use of flashprog instead of flashrom, for
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the reasons mentioned in the [Libreboot 20240225
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release](../../news/libreboot20240225.md).
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To reset bucts, do this:
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sudo ./bucts 0
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@ -2418,3 +2418,8 @@ out of date, for example only goes up to Broadwell even with the out of
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tree patches.
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Port it to skylake and above.
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interesting video
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=================
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<https://www.youtube.com/watch?v=5qauRh7eTNY>
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