coreboot February 2014

coreboot@coreboot.org

52 participants
148 discussions

Re: [coreboot] Motherboard Not on Support MB List -> Specs
by Corey Osgood 05 Feb '14

05 Feb '14

It's not the time that's the biggest issue here, it's the documentation. Since around the time of the i945 chipset, Intel has stopped sharing data crucial to coreboot development, mainly the location and configuration information on the memory controller registers, these docs are now only available under a very high level NDA, possibly internal-only. This is now stuffed into their MRC code and part of a binary blob. For this reason, coreboot is mostly aimed at AMD-based systems these days. AMD has been very supportive of the coreboot project. -Corey

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Re: [coreboot] C720 - ROM file
by Carmelo Ingrao 04 Feb '14

04 Feb '14

Le 4 févr. 2014 à 21:38, Aaron Durbin <adurbin(a)google.com> a écrit : > Just so the internets are aware as well. Here's how we recovered it on > ChromeOS: > > # mkdir /usr/local/test > # chromeos-firmwareupdate --sb_extract /usr/local/test/ > # flashrom -w /usr/local/test/bios.bin -i RW_LEGACY > > That should restore the contents of that section of the flash. > > -Aaron I confirm this works :) Thanks again Aaron ! -Carmelo

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Re: [coreboot] C720 - ROM file
by Carmelo Ingrao 04 Feb '14

04 Feb '14

Le 4 févr. 2014 à 16:54, Aaron Durbin <adurbin(a)chromium.org> a écrit : > On Tue, Feb 4, 2014 at 9:51 AM, Carmelo Ingrao <carmelo(a)ingrao.fr> wrote: >> Le 4 févr. 2014 à 16:48, Aaron Durbin <adurbin(a)chromium.org> a écrit : >> >>> >>> Ya. You aren't just going to be able to run that script. It assumes >>> you have coreboot checked out and cbfstool built as well as SeaBIOS >>> built. Perhaps Kevin can help you with that? Or he could at least >>> post his SeaBIOS image. You could stitch it into your image.bin after >>> reading it with flashrom. >>> >>> -Aaron >> >> Okay ! >> >> I have a friend who has the same C720P than me, he has Fedora installed on it (no more ChromeOS) >> >> If he dump his bios with « sudo flashrom -r path//to/romfile » can I write it to my chip with « sudo flashrom -w path/to/file » ? > > That should work, but make sure you use the '-i RW_LEGACY' option on > writing so that it only updates the SeaBIOS portion of the SPI. > Hello Houston, we have a problem !!! My friend has removed the write protect screw, and now he does NOT have SeaBIOS anymore !!! At the blank screen if he press CTRL + L he has like me he heards a bip … :( Do you have any idea ? please please please … Thanks ! Carmelo

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Acer c720p: seabios is gone after enabling write protection
by Yannick 04 Feb '14

04 Feb '14

Hi, I'm the one who tried to help Carmelo. Unfortunately, after I opened this machine (Acer c720p, french keyboard) and removed the screw to enable writing on coreboot, it now refuses to access to seabios if I press CTRL + L has I did before so many times. I've put the screw ack in, it's still the same. Thus the fedora 20 I installed is now out of reach. If I wait ~30 seconds, I've a second white screen proposing to reinstall ChromeOS using USB or SD. I hope I someone here can save me the trouble of reinstalling ChromeOS, then wipe it again, then reinstall Fedora 20 and reconfigure it... ATM i'll go for a good glass of Cognac VSOP (with all due respect to those finding alcohol offensive). Best regards, Yannick

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Re: [coreboot] C720 - ROM file
by Carmelo Ingrao 04 Feb '14

04 Feb '14

Le 4 févr. 2014 à 16:54, Aaron Durbin <adurbin(a)chromium.org> a écrit : > > That should work, but make sure you use the '-i RW_LEGACY' option on > writing so that it only updates the SeaBIOS portion of the SPI. > >> >> If not, how can I contact Kevin ? Do you have his mail ? >> >> Thanks again, you’re really nice to help me like that :) > > I saw that you responded to his email on teh mailing list. I would > expect him to get it. Okay, it’s the first time I use this mailing list, so I didn’t know if my message was arrived ! Now I have confirmation, perfect :) Carmelo

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Re: [coreboot] C720 - ROM file
by Carmelo Ingrao 04 Feb '14

04 Feb '14

Le 4 févr. 2014 à 16:48, Aaron Durbin <adurbin(a)chromium.org> a écrit : > > Ya. You aren't just going to be able to run that script. It assumes > you have coreboot checked out and cbfstool built as well as SeaBIOS > built. Perhaps Kevin can help you with that? Or he could at least > post his SeaBIOS image. You could stitch it into your image.bin after > reading it with flashrom. > > -Aaron Okay ! I have a friend who has the same C720P than me, he has Fedora installed on it (no more ChromeOS) If he dump his bios with « sudo flashrom -r path//to/romfile » can I write it to my chip with « sudo flashrom -w path/to/file » ? If not, how can I contact Kevin ? Do you have his mail ? Thanks again, you’re really nice to help me like that :) Carmelo

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Re: [coreboot] C720 - ROM file
by Carmelo Ingrao 04 Feb '14

04 Feb '14

Le 4 févr. 2014 à 16:32, Aaron Durbin <adurbin(a)chromium.org> a écrit : > It definitely is gone, but I am not sure why. > > I would use the script Kevin posted in > http://permalink.gmane.org/gmane.comp.bios.coreboot.seabios/7572 to > build a new SeaBIOS and flash it to the RW_LEGACY in the SPI. The > script looks to be well documented and straight forward. > Yep I have seen this … But I’m little noob … And I don’t understand what to do with this : "For those interested in reproducing, it will require the very latest seabios from the git repo. » I have downloaded his script, and make it executable, but when I launch it (from chromeOS) it tell something is missing : localhost Downloads # sh 7572-001.bin dd: opening ‘../image-20140117.rom’: No such file or directory 7572-001.bin: 19: /root/src/coreboot/coreboot/build/cbfstool: not found 1+0 records in 1+0 records out 64 bytes (64 B) copied, 0.000144062 s, 444 kB/s 7572-001.bin: 24: /root/src/coreboot/coreboot/build/cbfstool: not found 7572-001.bin: 26: /root/src/coreboot/coreboot/build/cbfstool: not found 7572-001.bin: 27: /root/src/coreboot/coreboot/build/cbfstool: not found 7572-001.bin: 29: /root/src/coreboot/coreboot/build/cbfstool: not found 7572-001.bin: 30: /root/src/coreboot/coreboot/build/cbfstool: not found 7572-001.bin: 31: /root/src/coreboot/coreboot/build/cbfstool: not found 1+0 records in 1+0 records out 1 byte (1 B) copied, 0.00114043 s, 0.9 kB/s 7572-001.bin: 34: /root/src/coreboot/coreboot/build/cbfstool: not found cp: cannot stat ‘../image-20140117.rom’: No such file or directory 0+1 records in 0+1 records out 2097151 bytes (2.1 MB) copied, 0.0788478 s, 26.6 MB/s

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Re: [coreboot] C720 - ROM file
by Carmelo Ingrao 04 Feb '14

04 Feb '14

Le 4 févr. 2014 à 16:22, Aaron Durbin <adurbin(a)chromium.org> a écrit : > On Tue, Feb 4, 2014 at 9:12 AM, Carmelo Ingrao <carmelo(a)ingrao.fr> wrote: >> Hi Aaron, first thanks to take the time to answer :) >> >> Le 4 févr. 2014 à 16:03, Aaron Durbin <adurbin(a)chromium.org> a écrit : >>> >>> SeaBIOS was loading correctly until you changed the GBB flags, right? >>> And CTRL+L is just not being detected any longer? Can you change the >>> GBB flags back and determine if the legacy booting still works? >> >> Yes, before doing mess with the gbb flags, the SeaBIOS was correctly working : I have once installed Fedora on my c720 >> Now CTRL+L is no longer detected (only a sound out the speakers) >> >> Yes I can change the GBB flags, but which one do I have to set ? > > I was thinking changing them back to 0x00, but it sounds like you > installed Fedora over ChromeOS? And it was working until you changed > the gbb flags? First, I had ChromeOS Then I installed Fedora Then I reinstall ChromeOS (no more Fedora), and at this moment I played with GBB flags. > >> >> >>>> >>>> I have read online it may be caused by the wipe of SeaBIOS part in the >>>> ROM. >>> >>> It's possible. Since you are in dev mode, could you run the following? >>> ' iotools mmio_dump 0xffc00000 0x200000 -b | hexdump -C' It will dump >>> the contents of legacy portion of the flash. We'd know for certain if >>> the area is wiped. >> >> >> I have copy/paste your command, and here is what I obtain : >> >> localhost / # iotools mmio_dump 0xffc00000 0x200000 -b | hexdump -C >> bash: iotools: command not found > > Sorry. I thought you were booting ChromeOS in dev mode (I'm just used > to using iotools). Try this: > > dd iflag=sync if=/dev/mem bs=2M skip=2046 count=1 | hexdump -C Yes I have right now ChromeOS in dev mode but it can’t find the iotools (when I start the laptop it says « press space to enable security) Here the output : localhost / # dd iflag=sync if=/dev/mem bs=2M skip=2046 count=1 | hexdump -C 00000000 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| * 1+0 records in 1+0 records out 2097152 bytes (2.1 MB) copied, 1.30793 s, 1.6 MB/s 00200000 Carmelo > > -Aaron

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Re: [coreboot] C720 - ROM file
by Carmelo Ingrao 04 Feb '14

04 Feb '14

Hi Aaron, first thanks to take the time to answer :) Le 4 févr. 2014 à 16:03, Aaron Durbin <adurbin(a)chromium.org> a écrit : > > SeaBIOS was loading correctly until you changed the GBB flags, right? > And CTRL+L is just not being detected any longer? Can you change the > GBB flags back and determine if the legacy booting still works? Yes, before doing mess with the gbb flags, the SeaBIOS was correctly working : I have once installed Fedora on my c720 Now CTRL+L is no longer detected (only a sound out the speakers) Yes I can change the GBB flags, but which one do I have to set ? >> >> I have read online it may be caused by the wipe of SeaBIOS part in the >> ROM. > > It's possible. Since you are in dev mode, could you run the following? > ' iotools mmio_dump 0xffc00000 0x200000 -b | hexdump -C' It will dump > the contents of legacy portion of the flash. We'd know for certain if > the area is wiped. I have copy/paste your command, and here is what I obtain : localhost / # iotools mmio_dump 0xffc00000 0x200000 -b | hexdump -C bash: iotools: command not found (before doing that I have entered « shell » and « sudo bash » Thanks ! Carmelo

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C720 - ROM file
by Carmelo Ingrao 04 Feb '14

04 Feb '14

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512 Hello, I'm new here and I hope I don't do anything wrong posting my question here ... So I have a C720P, and I wanted to have the blank nag screen only for 1 second : I have unscrewed the write protect screw, and in dev mode I have done this : sudo set_gbb_flags.sh 0x489 I didn't received any error message, but now I can't have SeaBIOS anymore ... I have read online it may be caused by the wipe of SeaBIOS part in the ROM. I need : - - reinstall SeaBIOS, I have found this http://permalink.gmane.org/gmane.comp.bios.coreboot.seabios/7572 but I don't understand what "For those interested in reproducing, it will require the very latest seabios from the git repo." stands for .. - - Or maybe I can write ALL the bios file, but I need someone intact one ... So if someone very kind can on his C720P launch this command :"sudo flashrom -r /tmp/image.rom" and send me the file it'll save my day :) Thanks for reading, and I hope it's ok to ask this question here. Carmelo -----BEGIN PGP SIGNATURE----- Version: GnuPG/MacGPG2 v2.0.20 (Darwin) Comment: GPGTools - https://gpgtools.org Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ iQIcBAEBCgAGBQJS8KUuAAoJELZV+OMrLOztPA0P/j5Lfy7uECnog4HMslLbVutM LGX3hUuoavRRQ3+WIzC3d9H+A22zGSDp8013WjSLsezw9VVnwom0nezdqNqk6wod 8N1rlnYc/MBRnNM3sBFzXZ6xurlGn9Ox0b4cvZn0YQxrCcwA51t5Sxv5BmGxoKTO iysxHJFJUjv/Bx8TDgmBC3vpmIyznbGCpX0RJYhXAzjTSclVbAHRlFF1oWDlgvfe +ODnPX9RpbVsUj2J5dBIO/HBdj1wVjk76l7rixXUDZldJUEEfT+NqyT6afYQxkjX jOYlRV7jbK35hLfoZESgb4qoLqSfYsHO382TjdA29KshfPtulFzzipuCE7B8+wf7 +D/uSL6qPg0fWMytF0mw57Q6KAIsv2L8pLJhHQzLRc72B+Iwa2EwJR4xe23wrtU9 IhbHZASR5MYJJnNgsKGuYxZl2cgC19knySMw8qrP+WJHbW6JMaIAtmHpJ7/KCGl2 bfvI2mClCWnKtQr1IgnrJ/I7O4KeAULcNWncwmuIdcaW4/41FXT57YOngc4kFGzO JhVnnxJJ5hft7ayFvSyFIUNMRRlrjQ8IAzRqKX/JdjecmnAVCuxSUqnqtxMJkDhG 1ydT9nEjtT0WKxkoLyUdyC7Fp7ZIGR1OpFZIpvuUWyps+L0Wjie2RWXhhEaSYk48 da9vbaJDDf550Bu9xJFe =jc6k -----END PGP SIGNATURE-----

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coreboot February 2014