The question about the fail at the begin of linux on MPC8360E.

The question about the fail at the begin of linux on MPC8360E.

[郭劲]

Hi,friends,
Thanks.

We boot the linux-2.6.22 on MPC8360 board, it failed, follow is the output
information. we just only success on linux-2.6.11, but fail on linux-2.6.19 and
linux-2.6.22. Both 2.6.19 and 2.6.22 are failed on same position,please see follow
information. linux-2.6.19 and linux-2.6.22 are come from BSP of freescale. I used
the u-boot-1.2.0 that compiled by myself. We guess that maybe we did not setup the
bootargs parameter on u-boot rightly or maybe the DDR-I hardware circuit design is
not good enough.

If the reason is the bootargs parameter, could you tell me what is the right
bootargs for linux-2.6.19 and linux-2.6.22?

If the reason is the DDR, I want to boot the linux on my SDRAM chip,kick off the
DDR, my SDRAM located on the address of F0000000~F3FFFFFF, total 64MB. How can I
modify the source code of linux to re-map it and ramdisk and others to my SDRAM
chip space?


Follow is the fail information:
=> bootm 0c000000 0e000000
## Booting image at 0c000000 ...
   Image Name:   Linux-2.6.22
   Image Type:   PowerPC Linux Kernel Image (gzip compressed)
   Data Size:    1333681 Bytes =  1.3 MB
   Load Address: 00000000
   Entry Point:  00000000
   Verifying Checksum ... OK
   Uncompressing Kernel Image ... OK
## Loading RAMDisk Image at 0e000000 ...
   Image Name:   uboot ext2 ramdisk rootfs
   Image Type:   PowerPC Linux RAMDisk Image (gzip compressed)
   Data Size:    3589813 Bytes =  3.4 MB
   Load Address: 00000000
   Entry Point:  00000000
   Verifying Checksum ... OK
   Loading Ramdisk to 0fc3e000, end 0ffaa6b5 ... OK    

RE: The question about the fail at the begin of linux on MPC8360E.

[Medve Emilian-EMMEDVE1]

Hi there,


You need a device tree. The defaut one is =
arch/powerpc/boot/dts/mpc836x_mds.dts. You need the DTC (Device Tree =
Compiler) from here http://jdl.com/git_repos/?p=3Ddtc.git;a=3Dsummary. =
This should be enough to give you some reading pointers.


Cheers,
Emil.


> -----Original Message-----
> From:=20
> linuxppc-embedded-bounces+emilian.medve=3Dfreescale.com@ozlabs.o
> rg=20
> [mailto:linuxppc-embedded-bounces+emilian.medve=3Dfreescale.com@
> ozlabs.org] On Behalf Of ??
> Sent: Thursday, November 01, 2007 10:09 PM
> To: linuxppc-embedded@ozlabs.org
> Subject: The question about the fail at the begin of linux on=20
> MPC8360E.
>=20
> Hi,friends,
> Thanks.
>=20
> We boot the linux-2.6.22 on MPC8360 board, it failed, follow=20
> is the output
> information. we just only success on linux-2.6.11, but fail=20
> on linux-2.6.19 and
> linux-2.6.22. Both 2.6.19 and 2.6.22 are failed on same=20
> position,please see follow
> information. linux-2.6.19 and linux-2.6.22 are come from BSP=20
> of freescale. I used
> the u-boot-1.2.0 that compiled by myself. We guess that maybe=20
> we did not setup the
> bootargs parameter on u-boot rightly or maybe the DDR-I=20
> hardware circuit design is
> not good enough.
>=20
> If the reason is the bootargs parameter, could you tell me=20
> what is the right
> bootargs for linux-2.6.19 and linux-2.6.22?
>=20
> If the reason is the DDR, I want to boot the linux on my=20
> SDRAM chip,kick off the
> DDR, my SDRAM located on the address of F0000000~F3FFFFFF,=20
> total 64MB. How can I
> modify the source code of linux to re-map it and ramdisk and=20
> others to my SDRAM
> chip space?
>=20
>=20
> Follow is the fail information:
> =3D> bootm 0c000000 0e000000
> ## Booting image at 0c000000 ...
>    Image Name:   Linux-2.6.22
>    Image Type:   PowerPC Linux Kernel Image (gzip compressed)
>    Data Size:    1333681 Bytes =3D  1.3 MB
>    Load Address: 00000000
>    Entry Point:  00000000
>    Verifying Checksum ... OK
>    Uncompressing Kernel Image ... OK
> ## Loading RAMDisk Image at 0e000000 ...
>    Image Name:   uboot ext2 ramdisk rootfs
>    Image Type:   PowerPC Linux RAMDisk Image (gzip compressed)
>    Data Size:    3589813 Bytes =3D  3.4 MB
>    Load Address: 00000000
>    Entry Point:  00000000
>    Verifying Checksum ... OK
>    Loading Ramdisk to 0fc3e000, end 0ffaa6b5 ... OK   =20
>=20
>=20
> _______________________________________________
> Linuxppc-embedded mailing list
> Linuxppc-embedded@ozlabs.org
> https://ozlabs.org/mailman/listinfo/linuxppc-embedded
>=20

Re: The question about the fail at the begin of linux on MPC8360E.

[Timur Tabi]

Medve Emilian-EMMEDVE1 wrote:
> Hi there,
> 
> 
> You need a device tree. The defaut one is arch/powerpc/boot/dts/mpc836x_mds.dts. You need the DTC (Device Tree Compiler) from here http://jdl.com/git_repos/?p=dtc.git;a=summary. This should be enough to give you some reading pointers.

And if your U-Boot doesn't support device trees, you'll need to enable cuImage 
support in the kernel as well.

-- 
Timur Tabi
Linux kernel developer at Freescale