Re: [coreboot] Samsung 550 Chromebook own Coreboot

[John Lewis]

On 29/07/2013 19:17, Aaron Durbin wrote:

  I'm just going to summarize our current
situation:

 1. HEAD does not work at all using the
 3rdparty/northbridge/intel/sandybridge/systemagent-r6.bin
 2. Reverting 1cc3416f5fb58883fdad7192856c258c01909fd7 and using
 systemagent-sandybridge.bin boots, but it does not handle the
 soldered-on memory.

 Does that sound about right?
Yep, that's it in a nutshell, Aaron. Also the SeaBIOS that gets pulled 
in links the bootmenu to F12. Needs to be a saner ESC or F2 default for 
Chromebooks as per ChromiumOS Coreboot.

 
 On Mon, Jul 29, 2013 at 1:12 PM, John Lewis <jlewis(a)johnlewis.ie> 
 wrote:

> On 29/07/2013 16:47, Aaron Durbin wrote:
>
>> On Mon, Jul 29, 2013 at 10:38 AM, John Lewis <jlewis(a)johnlewis.ie
>> [1]> wrote:
>>
>>> My 550 won't boot without the DIMM in, so it sounds like it's not
>>> recognising the embedded memory.
>> OK. That is a good data point. However, I don't know from what code
>> base that original wrapper was built from in order to debug 
>> further.
>> Did you save the original rom image that your device was shipped
>> with? I'd be curious to know if that matches the one found in the
>> blobs repo.
> You can find it at http://johnlewis.ie/bios.bin [3]and the mrc.bin's
> are different by a few kilobytes. I can also tell you that if I try 
> to
> use that mrc.bin with straight Coreboot I get a nice brick. ;)
>
>>> On 29/07/2013 16:25, Aaron Durbin wrote:
>>>
>>>> On Mon, Jul 29, 2013 at 10:22 AM, Kyösti Mälkki
>>>> <kyosti.malkki(a)gmail.com [2][1]> wrote:
>>>>
>>>>> Did someone change the SPD eeprom address notation in pei_data
>>>>> from 7-bit to 8-bit addresses? samsung/lumpy/romstage.c :
>>>>> .spd_addresses = { 0x50, 0x00,0xf0,0x00 },
>>>>> google/stout/romstage.c : spd_addresses: { 0xA0, 0x00,0xA4,0x00
>>>>> },
>>>> The 0xf0 handles the soldered down memory. I was looking at the
>>>> 0x50 address as well, but I think that is correct (I'm looking at
>>>> code that I think is the wrapper that you guys are using). I
>>>> could be wrong though.

Links:
------
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[2] mailto:[e-mail]
[3] http://johnlewis.ie/bios.bin