[U-Boot-Users] Problems booting a uImage on sequoia (PPC440EPx with fdt/powerpc)

[U-Boot-Users] Problems booting a uImage on sequoia (PPC440EPx with fdt/powerpc)

[Niklaus Giger]

Hi

I would like to run the DENX-v2.6.23.1 linux kernel (ARCH=powerpc) as a base 
to run some tests with xenomai. I had no problem to create a git branch and
to run
git checkout -b sequoia-DENX-v2.6.23.1 DENX-v2.6.23.1 
make ARCH=powerpc CROSS_COMPILE=ppc_4xx- O=../build sequoia_defconfig
make ARCH=powerpc CROSS_COMPILE=ppc_4xx- O=../build uImage

As the resulting kernel could not be loaded with my 1.2.0 u-Boot I spent some 
time reading the linux/Documentation/powerpc/booting-without-of.txt,
http://www.denx.de/wiki/UBoot/UBootFdtInfo
http://www.denx.de/wiki/DULG/LinuxFDTBlob

Downloading the dtc and installing it was a snap. I used the 
arch/powerpc/boot/dts/sequoia.dts as contained DENX-v2.6.23.1 release.

I discovered in Stefan's Roese u-boot-ppc4xx his for-1.3.1 branch which 
contains  some fdt patches (as of today). 

I patched sequoia following the example of the kilauea board, enabled the 
debugging output in cpu/ppc4xx/fdt.c. The patch is attached.

Now I am stuck here:
> Bytes transferred = 12288 (3000 hex)
> ## Booting image at 00200000 ...
>    Image Name:   Linux-2.6.23.1
>    Image Type:   PowerPC Linux Kernel Image (gzip compressed)
>    Data Size:    1461812 Bytes =  1.4 MB
>    Load Address: 00000000
>    Entry Point:  00000000
>    Verifying Checksum ... OK
>    Uncompressing Kernel Image ... OK
>    Booting using the fdt at 0x400000
> Updating property '/cpus/PowerPC,440EPx at 0/timebase-frequency' =  1f 78 a4
> 08(528000008) Updating property '/cpus/PowerPC,440EPx at 0/clock-frequency' = 
> 1f 78 a4 08(528000008) Updating property '/plb/clock-frequency' =  07 de 29
> 02(132000002) Updating property '/plb/opb/clock-frequency' =  03 ef 14
> 81(66000001) Updating property '/plb/opb/ebc/clock-frequency' =  03 ef 14
> 81(66000001) Updating /memory node to 0:268435456
> Updating node UART0: clock-frequency=11059200
> Updating node UART1: clock-frequency=11059200
> Updating node UART2: clock-frequency=11059200
> Updating node UART3: clock-frequency=11059200
> Updating node EMAC0
> Updating node EMAC1

I would appreciate if somebody could point out where I made a mistake and what 
the next hurdle to tackle is.

Thanks in advance.

-- 
Niklaus Giger
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[U-Boot-Users] Problems booting a uImage on sequoia (PPC440EPx with fdt/powerpc)

[Wolfgang Denk]

Dear Niklaus,

in message <200711202042.35481.niklaus.giger@member.fsf.org> you wrote:
> 
> As the resulting kernel could not be loaded with my 1.2.0 u-Boot I spent some 

Version 1.2.0 on Sequoia? Ummm. Please try 1.3.0 instead.

> I discovered in Stefan's Roese u-boot-ppc4xx his for-1.3.1 branch which 
> contains  some fdt patches (as of today). 

Right, but this is still somewhat experimental.

The recommended way do far is to boot an ARCH=powerpc kernel  on  the
Sequoia  by  using  the  boot  wrapper  (i. e. use cuImage instead of
uImage).


Best regards,

Wolfgang Denk

-- 
DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
It's certainly  convenient  the  way  the  crime  (or  condition)  of
stupidity   carries   with   it  its  own  punishment,  automatically
admisistered without remorse, pity, or prejudice. :-)
         -- Tom Christiansen in <559seq$ag1$1@csnews.cs.colorado.edu>

[U-Boot-Users] Problems booting a uImage on sequoia (PPC440EPx with fdt/powerpc)

[Niklaus Giger]

Dear Wolfgang,

Wolfgang Denk wrote:

> Dear Niklaus,
> 
> in message <200711202042.35481.niklaus.giger@member.fsf.org> you wrote:
>> 
>> As the resulting kernel could not be loaded with my 1.2.0 u-Boot I spent
>> some
> 
> Version 1.2.0 on Sequoia? Ummm. Please try 1.3.0 instead.
> 
>> I discovered in Stefan's Roese u-boot-ppc4xx his for-1.3.1 branch which
>> contains  some fdt patches (as of today).
> 
> Right, but this is still somewhat experimental.
> 
> The recommended way do far is to boot an ARCH=powerpc kernel  on  the
> Sequoia  by  using  the  boot  wrapper  (i. e. use cuImage instead of
> uImage).
> 
Thanks a lot for your answer. I just had to figure out that zImage is the
name of the generated image (e.g.
http://www.nabble.com/-PATCH--add-cuImage-comment-for-'make-help'-t4760921.html)
Now my kernel boots!

Thanks a lot for your prompt answer! (Now, I owe you a beer)

-- 
Niklaus Giger