mpc8349-mITX DTB load failure

mpc8349-mITX DTB load failure

[Sparks, Sam]

Hello All,

I am trying to boot the mpc8349-mITX board with Compact flash support,
and am unable to boot the Linux kernel. Here is the pertinant versioning
information:
DTC 1.2.0-rc2-g17773b0e
U-Boot 1.3.4-rc1-00012-g1953d12
Linux-2.6.26-05752-g93ded9b

I've built the DTB using the following two commands - neither change the
error I get during boot-up.
$ ../dtc/dtc -b 0 -I dts -O dtb -R 4 -S 0x3000 -o
/tftproot/ssparks/itx/cf2/itx.dtb -V 17
arch/powerpc/boot/dts/mpc8349emitx.dts
$ ../dtc/dtc -I dts -O dtb -o /tftproot/ssparks/itx/cf2/itx2.dtb
arch/powerpc/boot/dts/mpc8349emitx.dts

Can anyone shed any light onto what I am doing to cause the following
error? I haven't been able to find this error message in the mailing
list or by asking google...
## Booting kernel from Legacy Image at 01001000 ...
   Image Name:   Linux-2.6.26-05752-g93ded9b
   Created:      2008-07-24  20:40:59 UTC
   Image Type:   PowerPC Linux Kernel Image (gzip compressed)
   Data Size:    1708661 Bytes =3D  1.6 MB
   Load Address: 00000000
   Entry Point:  00000000
   Verifying Checksum ... OK
   Uncompressing Kernel Image ... OK
## Flattened Device Tree blob at 01000000
   Booting using the fdt blob at 0x1000000
   Loading Device Tree to 007fb000, end 007ff526 ... OK
WARNING: could not create /chosen FDT_ERR_BADSTRUCTURE.
ERROR: /chosen node create failed - must RESET the board to recover.
Resetting the board.

Thanks for the help,
Sam

Re: mpc8349-mITX DTB load failure

[Grant Likely]

On Mon, Jul 28, 2008 at 11:10:47AM -0500, Sparks, Sam wrote:
> Hello All,
> 
> I am trying to boot the mpc8349-mITX board with Compact flash support,
> and am unable to boot the Linux kernel. Here is the pertinant versioning
> information:
> DTC 1.2.0-rc2-g17773b0e
> U-Boot 1.3.4-rc1-00012-g1953d12
> Linux-2.6.26-05752-g93ded9b
> 
> I've built the DTB using the following two commands - neither change the
> error I get during boot-up.
> $ ../dtc/dtc -b 0 -I dts -O dtb -R 4 -S 0x3000 -o
> /tftproot/ssparks/itx/cf2/itx.dtb -V 17
> arch/powerpc/boot/dts/mpc8349emitx.dts
> $ ../dtc/dtc -I dts -O dtb -o /tftproot/ssparks/itx/cf2/itx2.dtb
> arch/powerpc/boot/dts/mpc8349emitx.dts

Try adding "-p 0x3000" to ensure that you get padding to the blob.

g.

RE: mpc8349-mITX DTB load failure

[Sparks, Sam]

> From: Grant Likely
> Sent: Monday, July 28, 2008 12:17 PM
>=20
> On Mon, Jul 28, 2008 at 11:10:47AM -0500, Sparks, Sam wrote:
> > Hello All,
> >=20
> > I am trying to boot the mpc8349-mITX board with Compact=20
> flash support,=20
> > and am unable to boot the Linux kernel. Here is the pertinant=20
> > versioning
> > information:
> > DTC 1.2.0-rc2-g17773b0e
> > U-Boot 1.3.4-rc1-00012-g1953d12
> > Linux-2.6.26-05752-g93ded9b
> >=20
> > I've built the DTB using the following two commands -=20
> neither change=20
> > the error I get during boot-up.
> > $ ../dtc/dtc -b 0 -I dts -O dtb -R 4 -S 0x3000 -o=20
> > /tftproot/ssparks/itx/cf2/itx.dtb -V 17=20
> > arch/powerpc/boot/dts/mpc8349emitx.dts
> > $ ../dtc/dtc -I dts -O dtb -o /tftproot/ssparks/itx/cf2/itx2.dtb
> > arch/powerpc/boot/dts/mpc8349emitx.dts
>=20
> Try adding "-p 0x3000" to ensure that you get padding to the blob.
>=20
> g.
>=20

No luck there, either. I ran into a issue with space a year ago, and was
getting the FDT_ERR_NOSPACE error until I added the -S 0x3000 option.
This looks like something completely different.

Thanks tho,
Sam

Re: mpc8349-mITX DTB load failure

[Grant Likely]

On Mon, Jul 28, 2008 at 12:49:19PM -0500, Sparks, Sam wrote:
> No luck there, either. I ran into a issue with space a year ago, and was
> getting the FDT_ERR_NOSPACE error until I added the -S 0x3000 option.
> This looks like something completely different.

Does your dts source file already have a chosen node?  There had been an
issue where u-boot cacks if chosen was pre-created.

g.

RE: mpc8349-mITX DTB load failure

[Sparks, Sam]

> From: Grant Likely
> Sent: Monday, July 28, 2008 1:03 PM
> Does your dts source file already have a chosen node?  There=20
> had been an issue where u-boot cacks if chosen was pre-created.

Nope, there is no reference to "chosen" in the dts

--Sam

Re: mpc8349-mITX DTB load failure

[Kim Phillips]

On Mon, 28 Jul 2008 11:10:47 -0500
"Sparks, Sam" <SSparks@aclaratech.com> wrote:

> ## Booting kernel from Legacy Image at 01001000 ...

> ## Flattened Device Tree blob at 01000000

so the dtb is being loaded only 0x1000 bytes from the kernel, yet it's
probably bigger than that.  Can you try different load addresses,
preferably with the two images at least 0x3000 bytes apart?

Kim

RE: mpc8349-mITX DTB load failure

[Sparks, Sam]

> From: Kim Phillips
> Sent: Monday, July 28, 2008 1:31 PM
> > ## Booting kernel from Legacy Image at 01001000 ...
>=20
> > ## Flattened Device Tree blob at 01000000
>=20
> so the dtb is being loaded only 0x1000 bytes from the kernel,=20
> yet it's probably bigger than that.  Can you try different=20
> load addresses, preferably with the two images at least=20
> 0x3000 bytes apart?

Ouch. Thanks for pointing that out, it worked. :-)

--Sam