kernel 2.6 for Xscale IXP42x platform

kernel 2.6 for Xscale IXP42x platform

[Queenie]

Hi Everybody,

I would like to load kernel 2.6 on my customised Target board having IXP422.
I have u-boot 1.1.6 bootloader. 

For this, I would like to know which kernel version can i decide on? How can
i determine which version of 2.6 to go in for? Also do i need any patch?
which ones ? and how to add a patch? can someone guide me through? 

I have an Image which was done earlier with a different kernel used for the
same board with redboot bootloader? Can i try using the same or will it be
checking somewhere for the redboot bootloader?


Which toolchain should i use for building this kernel for X-scale IXP422 big
endian architecture ? Is there nay opensource toolchain readymade avaliable
or do i have to built one myself? I have never done this before though..

For the time being, I have downloaded the kernel 2.6.20 from kernel.org. how
do i proceed next? how to get the IXP422 option in the kernel arch? 

Can you guide me through this process 
Pl help!

Queenie
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Re: kernel 2.6 for Xscale IXP42x platform

[Kristof Provost]

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Hash: SHA1

Queenie wrote:
> Hi Everybody,
>
> I would like to load kernel 2.6 on my customised Target board
> having IXP422. I have u-boot 1.1.6 bootloader.
>
> For this, I would like to know which kernel version can i decide
> on? How can i determine which version of 2.6 to go in for? Also do
> i need any patch? which ones ? and how to add a patch? can someone
> guide me through?
>
> I have an Image which was done earlier with a different kernel used
> for the same board with redboot bootloader? Can i try using the
> same or will it be checking somewhere for the redboot bootloader?
>
>
> Which toolchain should i use for building this kernel for X-scale
> IXP422 big endian architecture ? Is there nay opensource toolchain
> readymade avaliable or do i have to built one myself? I have never
> done this before though..
>
> For the time being, I have downloaded the kernel 2.6.20 from
> kernel.org. how do i proceed next? how to get the IXP422 option in
> the kernel arch?
>
> Can you guide me through this process Pl help!
>
> Queenie
Hi,

I'd advise you to use whatever version your hardware vendor has
decided to support. I've had a quick look at Intels documentation. The
IXP422 seems to be an ARM cpu with some networking functionality on
chip. Have a look at http://www.arm.linux.org.uk/.

The kernel itself should not depend on the bootloader. It's possible
your bootloader will expect different packaging (bzImage, vmlinux,
...) though. Consult the documentation for your bootloader.

Toolchains (and crosscompilers) are always a lot of fun. The good news
is Buildroot (http://buildroot.uclibc.org/). Buildroot will create a
cross compiler for you, based on the uClibc C library. Even if it
doesn't support your target it's a good idea to have a look at it as
it'll show you how it's done for other platforms. Buildroot supports
ARM targets so the toolchain produced by buildroot should be usable.

Regards,
Kristof


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RE: kernel 2.6 for Xscale IXP42x platform

[Rajat Jain]

Hi,

|
|I would like to load kernel 2.6 on my customised Target board 
|having IXP422.
|I have u-boot 1.1.6 bootloader. 
|
|For this, I would like to know which kernel version can i 
|decide on? How can
|i determine which version of 2.6 to go in for? Also do i need 
|any patch?
|which ones ? and how to add a patch? can someone guide me through? 

These are the most trickiest quetions :-) You need support for your processor and board in the kernel (if not already existing), for which either patches might already be floating (quite likely) or you may have to create your own.

|
|I have an Image which was done earlier with a different kernel 
|used for the
|same board with redboot bootloader? Can i try using the same 
|or will it be
|checking somewhere for the redboot bootloader?

I think the same image should work - and it depends on how similar are Redboot and U-boot in passing the control to the kernel. Kernel will not rely on on the boot loader being Red Boot or U-Boot or any other. But yes, if you want to try the same image then U-BOOT should be able to pass information / control to the kernel in the same way as Redboot was doing. This includes passing of command line args, environment variables, loading of ramdisk, passing size & address of ramdisk etc.

Thanks,

Rajat
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