Building a new kernel outside OpenEmbedded

[David Boddie]

Is it possible to build a new kernel for an Overo Fire outside the
OpenEmbedded system? If so, is there any particular version and
configuration that I should be using to avoid any known issues with the
Overo hardware?

I've tried cross-building and installing a kernel (2.6.31 from the
linux-omap-2.6 tree), but the boot process only gets as far as uncompressing
Linux and attempting to boot it - after which, nothing happens, so I've
clearly done something wrong.

David


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[Jeff Shanab]

David Boddie wrote:

> Is it possible to build a new kernel for an Overo Fire outside the
> OpenEmbedded system? If so, is there any particular version and
> configuration that I should be using to avoid any known issues with the
> Overo hardware?
>
> I've tried cross-building and installing a kernel (2.6.31 from the
> linux-omap-2.6 tree), but the boot process only gets as far as uncompressing
> Linux and attempting to boot it - after which, nothing happens, so I've
> clearly done something wrong.
>
> David
>
>
> ------------------------------------------------------------------------------
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>  

I don't yet have and overo to play with, So take this with that context
in mind. (but I run gentoo and have cross compiled a kernel for my phone)

Can you compare the .config of the working overo kernel to what you
created? I am making a Wild guess that you are creating kernel code for
non-existent hardware. Does the overo have a MMU or a northbridge
chipset for example.

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[Bobby Powers]

there is an Overo defconfig you can/should use to start off with:
cp arch/arm/configs/overo_defconfig .config
make oldconfig
make menuconfig
make uImage

yours,
Bobby

On Wed, Oct 28, 2009 at 10:23 AM, Jeff Shanab <jshanab@...> wrote:

> David Boddie wrote:
>> Is it possible to build a new kernel for an Overo Fire outside the
>> OpenEmbedded system? If so, is there any particular version and
>> configuration that I should be using to avoid any known issues with the
>> Overo hardware?
>>
>> I've tried cross-building and installing a kernel (2.6.31 from the
>> linux-omap-2.6 tree), but the boot process only gets as far as uncompressing
>> Linux and attempting to boot it - after which, nothing happens, so I've
>> clearly done something wrong.
>>
>> David
>>
>>
>> ------------------------------------------------------------------------------
>> Come build with us! The BlackBerry(R) Developer Conference in SF, CA
>> is the only developer event you need to attend this year. Jumpstart your
>> developing skills, take BlackBerry mobile applications to market and stay
>> ahead of the curve. Join us from November 9 - 12, 2009. Register now!
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>> gumstix-users mailing list
>> gumstix-users@...
>> https://lists.sourceforge.net/lists/listinfo/gumstix-users
>>
>>
> I don't yet have and overo to play with, So take this with that context
> in mind. (but I run gentoo and have cross compiled a kernel for my phone)
>
> Can you compare the .config of the working overo kernel to what you
> created? I am making a Wild guess that you are creating kernel code for
> non-existent hardware. Does the overo have a MMU or a northbridge
> chipset for example.
>
> ------------------------------------------------------------------------------
> Come build with us! The BlackBerry(R) Developer Conference in SF, CA
> is the only developer event you need to attend this year. Jumpstart your
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> ahead of the curve. Join us from November 9 - 12, 2009. Register now!
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>

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[David Boddie]

On Wednesday 28 October 2009 15:23, Jeff Shanab wrote:

> I don't yet have and overo to play with, So take this with that context
> in mind. (but I run gentoo and have cross compiled a kernel for my phone)

I'll bear that in mind. :-)

> Can you compare the .config of the working overo kernel to what you
> created? I am making a Wild guess that you are creating kernel code for
> non-existent hardware. Does the overo have a MMU or a northbridge
> chipset for example.

I'm unsure about where the .config file has been installed in these
pre-built images:

  http://www.sakoman.com/feeds/omap3/glibc/images/overo/

I've been configuring with the overo_defconfig configuration so far, but
I'm aware that maybe it needs some tweaking.

Thanks,

David


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[David Boddie]

On Thursday 29 October 2009 00:51, David Boddie wrote:

> I'm unsure about where the .config file has been installed in these
> pre-built images:
>
>   http://www.sakoman.com/feeds/omap3/glibc/images/overo/
>
> I've been configuring with the overo_defconfig configuration so far, but
> I'm aware that maybe it needs some tweaking.

OK, I used the scripts/extract-ikconfig tool from the kernel tree to take
the configuration from the pre-built uImage-overo-200910121635.bin image.

It looks like the configuration file needs updating, either using the
oldconfig or menuconfig Makefile rules, but building the kernel is
pretty straightforward from there. It seems to boot fine with an updated
palmtop system image, though I should repeat the process to see exactly
what needs to be on the SD card. :-)

Thanks for your help, Jeff.

David


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[David Boddie]

On Wednesday 28 October 2009 15:32, Bobby Powers wrote:

> there is an Overo defconfig you can/should use to start off with:
> cp arch/arm/configs/overo_defconfig .config
> make oldconfig
> make menuconfig
> make uImage

I have previously tried the following without producing a bootable kernel:

make overo_defconfig
make uImage
make modules
make modules_install

I passed suitable ARCH and CROSS_COMPILE values for these, and used a value
for INSTALL_MOD_PATH for the last one. Do I need to perform a step after the
"make overo_defconfig" step?

I took Jeff's advice and examined the configuration for an existing image,
and there appears to be some differences. I can build a working kernel
with that configuration, so I'll explore further to see why I couldn't
get the overo_defconfig configuration to work.

Thanks,

David


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[Benny B. Simonsen]

David Boddie skrev:

> On Thursday 29 October 2009 00:51, David Boddie wrote:
>
>  
>> I'm unsure about where the .config file has been installed in these
>> pre-built images:
>>
>>   http://www.sakoman.com/feeds/omap3/glibc/images/overo/
>>
>> I've been configuring with the overo_defconfig configuration so far, but
>> I'm aware that maybe it needs some tweaking.
>>    
>
> OK, I used the scripts/extract-ikconfig tool from the kernel tree to take
> the configuration from the pre-built uImage-overo-200910121635.bin image.
>
> It looks like the configuration file needs updating, either using the
> oldconfig or menuconfig Makefile rules, but building the kernel is
> pretty straightforward from there. It seems to boot fine with an updated
> palmtop system image, though I should repeat the process to see exactly
> what needs to be on the SD card. :-)
>
> Thanks for your help, Jeff.
>
> David
>
>
> ------------------------------------------------------------------------------
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> is the only developer event you need to attend this year. Jumpstart your
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>  

Regarding the config file which have been used to build the kernel.
It can be found in /proc/config.gz on a running system.
A little curious. Any reason to build the kernel outside OE?

/Benny

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[Bobby Powers]

On Thu, Oct 29, 2009 at 9:11 AM, Benny B. Simonsen <bbs@...> wrote:

> David Boddie skrev:
>> On Thursday 29 October 2009 00:51, David Boddie wrote:
>>
>>
>>> I'm unsure about where the .config file has been installed in these
>>> pre-built images:
>>>
>>>   http://www.sakoman.com/feeds/omap3/glibc/images/overo/
>>>
>>> I've been configuring with the overo_defconfig configuration so far, but
>>> I'm aware that maybe it needs some tweaking.
>>>
>>
>> OK, I used the scripts/extract-ikconfig tool from the kernel tree to take
>> the configuration from the pre-built uImage-overo-200910121635.bin image.
>>
>> It looks like the configuration file needs updating, either using the
>> oldconfig or menuconfig Makefile rules, but building the kernel is
>> pretty straightforward from there. It seems to boot fine with an updated
>> palmtop system image, though I should repeat the process to see exactly
>> what needs to be on the SD card. :-)
>>
>> Thanks for your help, Jeff.
>>
>> David
>>
>>
>> ------------------------------------------------------------------------------
>> Come build with us! The BlackBerry(R) Developer Conference in SF, CA
>> is the only developer event you need to attend this year. Jumpstart your
>> developing skills, take BlackBerry mobile applications to market and stay
>> ahead of the curve. Join us from November 9 - 12, 2009. Register now!
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>> gumstix-users mailing list
>> gumstix-users@...
>> https://lists.sourceforge.net/lists/listinfo/gumstix-users
>>
> Regarding the config file which have been used to build the kernel.
> It can be found in /proc/config.gz on a running system.
> A little curious. Any reason to build the kernel outside OE?

Personally, I'm working on a one-off robot to show off some of my
companies networking and control software, and would prefer to use the
Debian armel port on the microSD card instead of OpenEmbedded.  Part
of this is that I have a deadline, and I'm much more familiar with
Debian.

yours,
Bobby

> /Benny

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[David Boddie]

On Thursday 29 October 2009 14:11, Benny B. Simonsen wrote:

> Regarding the config file which have been used to build the kernel.
> It can be found in /proc/config.gz on a running system.

Thanks. I remember reading that somewhere. I'll take a look at that on one
of the pre-built systems and compare it to what I got by using the
extract-ikconfig script.

> A little curious. Any reason to build the kernel outside OE?

I found OE a bit heavy to get started with and I'm looking at other
environments for cross-building.

David


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[Grahame Jordan]

Hi,

I have written a convenience script for configuring the kernel in OE. See attached.

First I create a user branch and:

cp -a com.gumstix.collection/packages/linux  USERBRANCH/packages/
mkdir USERBRANCH/bin
cp configureKernel.sh USERBRANCH/bin

Set up the environment variables correctly in my own ${USERBRANCH}/profile.
-----------------------------------------------------------------------------------------------------------------
#
# Environment setup for gumstix oe
#

export GUMSTIXTOP="/home/Gumstix-Verdex"
export OEBRANCH="${GUMSTIXTOP}/org.openembedded.snapshot"
export GUMSTIXBRANCH="${GUMSTIXTOP}/com.gumstix.collection"

export USERBRANCH=`pwd`;
echo USERBRANCH=$USERBRANCH

export PATH="${USERBRANCH}/bin:${GUMSTIXTOP}/bitbake/bin:${HOME}/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games"
export BBPATH="${GUMSTIXTOP}/build:${USERBRANCH}:${GUMSTIXBRANCH}:${OEBRANCH}"

umask 0002
-----------------------------------------------------------------------------------------------------------------

cd USERBRANCH
source profile

configureKernel.sh
You may need to alter some environment variable for GNOME_TERMINAL if the terminal does not appear.

Configuring busybox is done in a similar fashion.

Cheers

Grahame Jordan



Bobby Powers wrote:

there is an Overo defconfig you can/should use to start off with:
cp arch/arm/configs/overo_defconfig .config
make oldconfig
make menuconfig
make uImage

yours,
Bobby

On Wed, Oct 28, 2009 at 10:23 AM, Jeff Shanab jshanab@... wrote:
  

David Boddie wrote:
    

Is it possible to build a new kernel for an Overo Fire outside the
OpenEmbedded system? If so, is there any particular version and
configuration that I should be using to avoid any known issues with the
Overo hardware?

I've tried cross-building and installing a kernel (2.6.31 from the
linux-omap-2.6 tree), but the boot process only gets as far as uncompressing
Linux and attempting to boot it - after which, nothing happens, so I've
clearly done something wrong.

David


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I don't yet have and overo to play with, So take this with that context
in mind. (but I run gentoo and have cross compiled a kernel for my phone)

Can you compare the .config of the working overo kernel to what you
created? I am making a Wild guess that you are creating kernel code for
non-existent hardware. Does the overo have a MMU or a northbridge
chipset for example.

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