[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 at johnlewis.ie> 
> wrote:
>
>> On 29/07/2013 16:47, Aaron Durbin wrote:
>>
>>> On Mon, Jul 29, 2013 at 10:38 AM, John Lewis <jlewis at 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 at 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:
------
[1] mailto:jlewis at johnlewis.ie
[2] mailto:kyosti.malkki at gmail.com
[3] http://johnlewis.ie/bios.bin