[coreboot] Samsung 550 Chromebook own Coreboot

John Lewis jlewis at johnlewis.ie
Mon Jul 29 16:39:05 CEST 2013


Right, here is cbmem console output, which was "-c" not "-l". As you 
can see, it says fairly early on it recognises 2GB not 4. It's not 
exactly verbose about why. I also noticed later in the dmesg output that 
"[    1.071359] [drm] Memory usable by graphics device = 2048M", that 
doesn't mean it's reserved, does it?

On 29/07/2013 15:31, Aaron Durbin wrote:

> It's under the 'util' directory in the coreboot repository:
>
>
http://review.coreboot.org/gitweb?p=coreboot.git;a=tree;f=util/cbmem;h=14fbe6c462edf294e247e95616700cee7a6f46db;hb=refs/heads/master
>
> From this:
> [ 0.000000] e820: BIOS-provided physical RAM map:
> [ 0.000000] BIOS-e820: [mem 0x0000000000000000-0x000000000009fbff] 
> usable
> [ 0.000000] BIOS-e820: [mem 0x000000000009fc00-0x000000000009ffff]
> reserved
> [ 0.000000] BIOS-e820: [mem 0x00000000000f0000-0x00000000000fffff]
> reserved
> [ 0.000000] BIOS-e820: [mem 0x0000000000100000-0x000000001fffffff] 
> usable
> [ 0.000000] BIOS-e820: [mem 0x0000000020000000-0x00000000201fffff]
> reserved
> [ 0.000000] BIOS-e820: [mem 0x0000000020200000-0x000000003fffffff] 
> usable
> [ 0.000000] BIOS-e820: [mem 0x0000000040000000-0x00000000401fffff]
> reserved
> [ 0.000000] BIOS-e820: [mem 0x0000000040200000-0x000000007c6dffff] 
> usable
> [ 0.000000] BIOS-e820: [mem 0x000000007c6e0000-0x000000007f1fffff]
> reserved
> [ 0.000000] BIOS-e820: [mem 0x00000000f0000000-0x00000000f3ffffff]
> reserved
> [ 0.000000] BIOS-e820: [mem 0x0000000100000000-0x00000001005fffff] 
> usable
>
> Adding up the reported usable memory should jive with your
> expectations. As for needing console, yes, you will need to compile
> with console.
>
> CONFIG_EARLY_CBMEM_INIT=y
> CONFIG_CONSOLE_CBMEM=y
>
> On Mon, Jul 29, 2013 at 9:19 AM, John Lewis <jlewis at johnlewis.ie> 
> wrote:
>
>> Where do I find/build cbmem binary? Please find attached dmesg. On
>> 29/07/2013 14:43, Aaron Durbin wrote:
>>
>>> Can you provide the full firmware log and dmesg? 'cbmem -l' should
>>> give you the firmware log. On Sun, Jul 28, 2013 at 7:47 AM, John
>>> Lewis <jlewis at johnlewis.ie [3]> wrote:
>>>
>>>> Guys, I have noticed that not all the 4 GB or RAM is showing, and 
>>>> I
>>>> get this message in the kernel: [ 0.000000] Memory:
>>>> 1914260k/4200448k available (6486k kernel code, 2160136k absent,
>>>> 126052k reserved, 6780k data, 1412k init) Any idea what the 
>>>> problem
>>>> is (mrc.bin), and what I might do to workaround? John. -- coreboot
>>>> mailing list: coreboot at coreboot.org [1] [1]
>>>> http://www.coreboot.org/mailman/listinfo/coreboot [2] [2]
>> Links: ------ [1] mailto:coreboot at coreboot.org [4] [2]
>> http://www.coreboot.org/mailman/listinfo/coreboot [5]


Links:
------
[1] mailto:coreboot at coreboot.org
[2] http://www.coreboot.org/mailman/listinfo/coreboot
[3] mailto:jlewis at johnlewis.ie
[4] mailto:coreboot at coreboot.org
[5] http://www.coreboot.org/mailman/listinfo/coreboot
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