[U-Boot] MinnowBoard Max uboot

[Bin Meng]

Hi Tom,

On Thu, Jun 11, 2015 at 11:02 PM, Beaman, Thomas
<Thomas.Beaman at xerox.com> wrote:
> Hi Simon,
>
> I have enclosed both kernel boot files
>
> Thanks,
> Tom
>

Please stop top-posting.

> -----Original Message-----
> From: sjg at google.com [mailto:sjg at google.com] On Behalf Of Simon Glass
> Sent: Wednesday, June 10, 2015 9:15 PM
> To: Beaman, Thomas
> Cc: u-boot at lists.denx.de
> Subject: Re: MinnowBoard Max uboot
>
> Hi Thomas,
>
> On 10 June 2015 at 12:38, Beaman, Thomas <Thomas.Beaman at xerox.com> wrote:
>> Hi Simon,
>>
>> I have just picked up u-boot-2015.07-rc2 with your support for multiple CPUs on the minnowboard max. I can see using the uboot cpu list command that both CPUs now show up.  But the kernel does not see 2 CPUs in /proc/cpuinfo. If I boot the same kernel using an EFI BIOS I do see 2 CPUs in /proc/cpuinfo. Is there some uboot to kernel hand off I do not have configured properly ? I am not sure how the number of CPUs gets transferred from the boot to the kernel.
>>
>> Thanks for any input you may have.
>> Tom
>>
>> => cpu list
>>   0: cpu at 0              Intel(R) Atom(TM) CPU  E3825  @ 1.33GHz
>>   1: cpu at 1              Intel(R) Atom(TM) CPU  E3825  @ 1.33GHz
>>
>> ## minnow max when booted from uboot 2015-07.rc2 root at atom_230:~# cat
>> /proc/cpuinfo | grep processor
>> processor       : 0
>>
>> ## minnow max when booted from BIOS
>> root at atom_230:~# cat /proc/cpuinfo | grep processor
>> processor       : 0
>> processor       : 1
>
> Do you have the output from the kernel boot please?
>
> Regards,
> Simon
>
>>
>>
>>
>> -----Original Message-----
>> From: sjg at google.com [mailto:sjg at google.com] On Behalf Of Simon Glass
>> Sent: Tuesday, March 10, 2015 1:21 PM
>> To: Beaman, Thomas
>> Cc: u-boot at lists.denx.de; Bin Meng; gabriel huau
>> Subject: Re: MinnowBoard Max uboot
>>
>> Hi Tom,
>>
>> On 10 March 2015 at 05:24, Beaman, Thomas <Thomas.Beaman at xerox.com> wrote:
>>> Hi Simon,
>>>
>>> Do you know what will be the timeframe of when someone may be able to
>>> look at this in more detail. I will be able to help test any updates
>>> if needed
>>>
>>
>> I will take a look once I have things lined up for the next release, likely mid April.
>>
>> Regards,
>> Simon
>>
>>> Thanks,
>>> Tom
>>>
>>> -----Original Message-----
>>> From: sjg at google.com [mailto:sjg at google.com] On Behalf Of Simon Glass
>>> Sent: Monday, March 09, 2015 11:49 AM
>>> To: Beaman, Thomas
>>> Cc: u-boot at lists.denx.de; Bin Meng; gabriel huau
>>> Subject: Re: MinnowBoard Max uboot
>>>
>>> +Bin and Gabriel
>>>
>>> Hi Tom,
>>>
>>> On 9 March 2015 at 08:08, Beaman, Thomas <Thomas.Beaman at xerox.com> wrote:
>>>>
>>>>
>>>> Hi Simon,
>>>>
>>>>
>>>>
>>>> I see you have put support for the MinnowBoard Max in the u-boot mainline.
>>>> Thanks this is a very useful addition.  I have been able to follow
>>>> your readme and build a working bare metal uboot. Using the built
>>>> uboot I can load and bring up a Linux Kernel.
>>>>
>>>>
>>>>
>>>> What I noticed from the running kernel is that only one of the two
>>>> cores on the E3825 is running. In the power PC uboots I usually see
>>>> a section for the multiple cores in the .dts file. My questions is
>>>> how do I get both CPUs running on this board. Is it a uboot .dts
>>>> file setup that will enable this, or is something in the kernel start up that does this.
>>>>
>>>>
>>>>
>>>> As a test I boot the same kernel using the EFI BIOS on the minnow
>>>> board and both CPUs are running.
>>>>
>>>>
>>>>
>>>> Any suggestions or comments you have would be welcomed.
>>>>
>>>>
>>>
>>> My guess is that the LAPIC CPU start-up is missing. It isn't 100% clear what the FSP does and does not do, but perhaps it does not do that.
>>>
>>> I did make something of a start on this with ivybridge but it isn't complete, and it seems to be needed here.
>>>
>>> Regards,
>>> Simon
>

I've checked your kernel log, and it turns out that you did not turn
on CONFIG_SFI in your kernel build. Please make sure CONFIG_SFI=y to
build the kernel and have a try.

Regards,
Bin