-------- Original-Nachricht --------
Datum: Fri, 03 Jun 2011 22:01:28 +0800
Von: Bear<jilingshu@gmail.com>
An: Gerhard Pircher<gerhard_pircher@gmx.net>
Betreff: Re: Can I install debian on a e300 board?
I haven't build a kernel. I just download
http://cdimage.debian.org/debian-cd/6.0.1a/powerpc/iso-cd/debian-6.0.1a-powerpc-businesscard.iso
and extract kernel from it.
Okay.
Yes, this command is available:
=> fdt
Usage:
fdt - flattened device tree utility commands
=> help fdt
fdt addr<addr> [<length>] - Set the fdt location to<addr>
fdt boardsetup - Do board-specific set up
fdt move<fdt> <newaddr> <length> - Copy the fdt to<addr>
fdt print<path> [<prop>] - Recursive print starting at<path>
fdt list<path> [<prop>] - Print one level starting at<path>
fdt set<path> <prop> [<val>] - Set<property> [to<val>]
fdt mknode<path> <node> - Create a new node after<path>
fdt rm<path> [<prop>] - Delete the node or<property>
fdt chosen - Add/update the /chosen branch in the tree
Hints:
If the property you are setting/printing has a '#' character or spaces,
you MUST escape it with a \ character or quote it with ".
Examples: fdt print / # print the whole tree
fdt print /cpus "#address-cells"
fdt set /cpus "#address-cells" "[00 00 00 01]"
=>
Very good, so the Debian kernel image should be fine, as long as it
supports the CPU on your board.
For more information about flattened device trees in U-Boot you may look
at this site:
http://www.denx.de/wiki/DULG
or post on the<u-boot@lists.denx.de> mailing list (I think also
Freescale developers are watching this list).
I will try to build a kernel now :) But I still in a mess where to put
my kernel and how to configure my kernel to load the root filesystem
from SD card. I really have less knowledge on embedded system.
> BTW: you're using a load address of 0x00200000 with a 6 MB kernel
> image!
> Maybe bootm simply overwrites the kernel image with such a low load
> address. I would try a higher one (maybe 0x01000000).
I am not familiar with u-boot kernel load mechanical. If I load a image
into 0x00200000, what would happen? Will the image be loaded into
0x00000000 - 0x00200000? Thanks.
I think tftpboot loads the kernel image to 0x00200000 and upwards. Then
bootm copies/relocates it to 0x0, because that's the entry address of
the kernel image. But bootm will corrupt the image data at 0x00200000,
while it copies the data to 0x0. Just a guess.
Gerhard