[coreboot] Where to get ME image/flash descriptors for the x220?

[qma ster]

Hi Taiidan, try following these instructions:
1) download the latest official BIOS update .exe file from your laptop
manufacturer's website (Lenovo in this case)
2) open this .exe file with 7zip utility and extract all its' contents to a
separate folder
3) most likely is that amoung these extracted files you will see a several
megabytes binary file, which contains not just a BIOS image but also EC
firmware image and some other images. Then you open this binary file in a
hex editor like Okteta and search for some ASCII string symbols like for
example _EC_IMG to e.g. locate the beginning of EC firmware block, and
knowing what size in bytes the EC firmware should be - you cut the same
amount of bytes after _EC_IMG text - and save into a new binary file
Something like that, will probably work for you. Good luck in your research
;)

2017-03-07 5:23 GMT+00:00 Taiidan at gmx.com <Taiidan at gmx.com>:

> Uhh thanks but that's kinda missing the point of this - that I don't want
> binaries from random people on the internet.
>
> I need to know how to extract it from the bios update files, not the bios
> already on the EEPROM.
>
>
> On 03/06/2017 11:35 PM, Matt DeVillier wrote:
>
> I have the IFD and ME from an x220 that I recently flashed with coreboot
> for a customer, extracted from their stock firmware, and verified working
> with the coreboot ROM I subsequently flashed.  Can zip and send via email,
> or whatever you prefer
>
> On Mon, Mar 6, 2017 at 10:23 PM, Taiidan at gmx.com <Taiidan at gmx.com> <Taiidan at gmx.com> wrote:
>
>
> On 03/05/2017 05:20 AM, Arthur Heymans wrote:
> "Taiidan at gmx.com" <Taiidan at gmx.com> <Taiidan at gmx.com> <Taiidan at gmx.com> writes:
>
> Well I managed to download the latest BIOS from the lenovo site, which
>
> includes an ME update now the issue is that I can't seem to figure out
> how to extract it from the .FL1 and .FL2 files.
>
> Those might have a length too long to fit a flash so you need to trim
>
> those down before using ifdtool on those (If they contain and ifd of
> course)
> so depending on size of rom
> dd if=FL1(or 2)file of=vendor_bios.rom bs=1 count=xM
>
> and then ifdtool -x vendor_bios.rom
>
>
> It didn't work :( after that still "no flash descriptor found in this
> image"
>
> These are the files and the flash chip on the board is 8M
> 8523776 '$01CB000.FL1'
> 8523776 '$01CB000.FL2'
> 8523776 '$01CB100.FL2'
> All of them have different hashes, but I do not know what makes them
> different (maybe it is for various board revisions?)
>
>
>
> I would also like to know as to how I can re-flash the EC firmware if
>
> that could potentially cause problems, I of course do not know if it
> has DMA.
>
> Only existing tool to flash EC is using vendor tool.
>
> EC are only accessed trough port mapped IO (or on newer ones also via
> memory mapped IO). EC itself does not have DMA afaik.
>
>
>
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