Re: Porting OE to new hardware

[Gary Thomas <gary@mlbassoc.com>]

On 03/30/2010 12:14 PM, Bernard Mentink wrote:
> Thanks Khem,
>
> That helps a lot. On the kernel config issue there is one thing I don't
> understand.
>
> I have set up to do an ARM  i.mx31 build, but when I did a "make menuconfig"
> in the /build/tmp/.../kernelxxxxx directory, it only shows x86 options, I
> don't know where all the i.mx31 kernel options are.

You didn't tell it - the default architecture is the one you build on (probably
x86).  Try this instead:
   % make ARCH=arm menuconfig

> On Wed, Mar 31, 2010 at 7:03 AM, Khem Raj<raj.khem@gmail.com>  wrote:
>
>> On Mon, Mar 29, 2010 at 12:29 PM, Bernard Mentink<bmentink@gmail.com>
>> wrote:
>>> Hi All,
>>>
>>> I am jumping across to this email list as the user one has very little
>>> traffic.
>>>
>>> I have just found OE and would like to use it to get Linux up and running
>> on
>>> some custom hardware. The hardware is currently running the logicloader
>>> bootloader from LogicPD and a YAFFS2 filesystem.
>>>
>>> I have found very little info on the steps necessary to port to new
>>> hardware. As far as OE is concerned, I have built an image after altering
>>> the MACHINE and DISTRO to something close to what I need.
>>> I now have a zimage (kernel) and a rootFS.
>>>
>>> However I have a number of questions:
>>>
>>> 1. To boot with zimage with  logicloader, I have to load the image into
>>> memory at an address, and then execute it at the start code which I
>> presume
>>> is an offset the start of the image. Can anyone tell me how I can find
>>> the relevant map file to work out
>>> what offset I need to apply? I did a search for *.map files in the
>> build/tmp
>>> direcory and found nada ..
>>
>> this post tells how to load linux kernel using logicloader. It might help
>> you.
>>
>> http://forums.freescale.com/t5/Other-Microcontrollers/load-zImage-or-vmlinux-using-LogicLoader/td-p/32749;jsessionid=F6F40E5BF81249CFF86028A7AB86DE29
>>
>>>
>>> 2. How do I do a kernel config? Is there an option to pass to bitbake to
>> do
>>> that, or do I have to find the kernel source and do it manually, then
>>> rebuild with bitbake?
>>
>> You can copy the .config you want into
>> recipes/linux/<chosen-kernel-version>/<machine>/defconfig file and it
>> will use
>> it to build the kernel for you machine. You can also edit the .config
>> on fly search the ml on how to do it.
>>
>>>
>>> 3. What src files in the kernel do I need to to maybe alter to get the
>>> serial port and memory map right for my target hardware ..
>>>
>>
>> you can specify serial port in kernel commandline too unless your board
>> needs
>> a special handling of serial port.
>>
>>> 4. Once I get the kernel booting, I need it to load the rootfs, initially
>> I
>>> can boot that from NFS, but I would like to eventually load it from my
>> YAFFS
>>> NAND partition, how do I do that?
>>
>> you can do that thru kernel commandline.
>>
>>>
>>>
>>> Hope someone can give me some pointers in the right direction ... I would
>>> love to kick off WinCE from this hardware ;-)
>>>
>>> Cheers,
>>> Bernie
>>>
>>> --
>>> You always have believers and scepticts.. A True inventor is always a
>>> believer..
>>> _______________________________________________
>>> Openembedded-devel mailing list
>>> Openembedded-devel@lists.openembedded.org
>>> http://lists.linuxtogo.org/cgi-bin/mailman/listinfo/openembedded-devel
>>>
>>
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>>
>
>
>

-- 
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Gary Thomas                 |  Consulting for the
MLB Associates              |    Embedded world
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