[U-Boot] Loading Linux Image on AT91SAM9263-EK

[U-Boot] Loading Linux Image on AT91SAM9263-EK

[pranav yamjala]

I am trying to port linux on the same board as mentioned in the subject. I
want to know how to configure the crosscompiler to build uimage or an image
of the kernel. I have got the other requirements like at91bootstrap
boot.bin and u-boot.bin ready configured for the board. I have also found
root file system and configured it as a jffs2 ext. The kernel i am not able
to build as i dont know what crosscompiler to use.
I have used buildroot to get the above images but buildroot doesnt have the
option to configure for at91sam9263 (or does it ?? i didnt get one though)
Please advise how to proceed.

-- 
Yamjala Pranav
Electrical Engg

[U-Boot] Loading Linux Image on AT91SAM9263-EK

[Bo Shen]

Hi Pranav,

On 05/09/2013 10:02 PM, pranav yamjala wrote:
> I am trying to port linux on the same board as mentioned in the subject. I
> want to know how to configure the crosscompiler to build uimage or an image
> of the kernel. I have got the other requirements like at91bootstrap
> boot.bin and u-boot.bin ready configured for the board. I have also found
> root file system and configured it as a jffs2 ext. The kernel i am not able
> to build as i dont know what crosscompiler to use.

For the cross compiler, you can use CodeSourcery toolchain or the 
toolchain build from buildroot, you can choose the one you prefer.

Best Regards,
Bo Shen

[U-Boot] Loading Linux Image on AT91SAM9263-EK

[Derek Ou]

You can use U-boot to write the file to NAND as well.  The address does 
not matter as long
as your bootcmd is reading the kernel from the same address.

Please check your U-boot environment settings and your nand dump of the 
NAND location
(0x200000).  If you want to get help, post those information.

Derek
> Date: Wed, 11 Feb 2009 15:33:19 -0400
> From: Amandeep Bhullar <abhullar@techlinkentertainment.com>
> Subject: [U-Boot] Loading Linux Image on AT91SAM9263-EK
> To: dasfoo at yahoo.com
>
> I have questions about loading the Linux Image. Do I just use SAM-BA 
> v2.7 tool and send file uImage to address 0x200000? I tied that and I 
> got Error: Cant get kernel image.
>
> Any help will be appreciated !!
>
> Aman.
>   

[U-Boot] u-boot for ARM

[Pink Boy]

Amandeep Bhullar sez,

> I have an Atmel AT91SAM9263 evaluation board with an
> arm926ejs based processor. I want to configure U-boot 
> for this and want to have a USB device boot option 
> available too. Though the U-boot will be in NAND 
> Flash but i want the board to boot from a USB device 
> like a USB Flash drive etc.

Sounds like an adventure!  

> I was reading the README and it talks about configuring a
> large number of options. Where do I define these options? 
> In which file?

For your board the file with many of the defines is.

include\configs\at91sam9263ek.h
 
> if i  just give the command
> $ make arm926ejs_config
> if comes with a message
> make: *** No rule to make target
> 'arm926ejs_config'. Stop.

You need to type,
make at91sam9263ek_config
make

Also it's a good idea to have the environment variable 

CROSS_COMPILE

Set to point to your tool chain, as in

CROSS_COMPILE=\opt\mytoolchaintool\arm-elf-

where the directory

\opt\mytoolchaintool\

Contains your tools, such as arm-elf-gcc etc etc.

> Can anybody help me in how to obtain a .bin file for my
> processor that i can load in NANDFlash and use this U-boot.

Can't help there, don't know if it's possible.  I do know that
you can boot out of NOR (parallel) and Atmel Dataflash (Serial).
I would suggest building the standard u-boot and learn how it
works and then go from there.

Mr Foo
---

[U-Boot] Loading Linux Image on AT91SAM9263-EK

[Amandeep Bhullar]

Hi All,

I have Atmel AT91SAM9263 Evlauation kit and want to load Linux-2.6.27 on 
it. Here is what I did:

1. Downloaded Linux-2.6.27 and followed instructions on 
http://www.linux4sam.org/twiki/bin/view/Linux4SAM/LinuxKernel to build 
the Linux kernel. I used cross tool chain arm-none-linux-gnueabi-
2. As a result i got file "vmlinux".
3. Converted it to binary using the command -     
arm-none-linux-gnueabi-objcopy -O binary -R .note -R .comment -S vmlinux 
linux.bin
4. Since U-boot uses only uImage, I gave command -    mkimage -A arm -O 
linux -C none -T kernel -a 200000 -e 200000 -n linux-2.6 -d linux.bin uImage
    This gave me the uImage file. I used Load address and entry point as 
0x200000 because it is suggested at 
http://www.linux4sam.org/twiki/bin/view/Linux4SAM/GettingStarted#Linux4SAM_NandFlash_demo_Memory 
that linux kernel should be at 0x200000 to boot from NANDFLASH. /Please 
comment if I built the image uImage file right?/

Now I want to use this Linux image on the AT91SAM9263-EK board. I use 
the Atmel tool SAM-BA v2.7. I erased the NANDFlash. Loaded Bootstrap and 
u-boot at the said addresses. It goes to U-boot prompt fine. The 
evluation kit is connected through serial port and I use hyperterminal. 
I get the U-boot prompt.

I have questions about loading the Linux Image. Do I just use SAM-BA 
v2.7 tool and send file uImage to address 0x200000? I tied that and I 
got Error: Cant get kernel image.

Any help will be appreciated !!

Aman.