[U-Boot] Unable to boot Linux Kernel on Media5200

[Wolfgang Denk]

Dear Christopher Beley,

In message <4AC8FB3E.3050609 at wisc.edu> you wrote:
> 
> setenv bootargs console=ttyPSC5,115200 root=/dev/nfs rw
> nfsroot=$(serverip):$(rootpath)
> tftp 900000 /tftpboot/media5200.dtb
> tftp 500000 /tftpboot/uImage
> bootm 500000 - 900000
> 
> However, after it uncompresses the kernel I get:
> 
> ## Loading RAMDisk Image at 00000000 ...
> Bad Magic Number

That means that you are running a very, very old version of U-Boot
which does not incorporate any device tree support at all.

> However, I do not have/want a RAMDisk and according to the FAQ I should
> just be able to use a - to say I don't have one (since I need to specify
> in the third argument the address of the dtb).  Any idea what I could be
> doing wrong?  I guess I could always create a dummy ram disk and see if
> it works...but...I shouldn't have to do that.

No, this is not needed. The problem here is that your old U-Boot does
not know about the thre argument  version  of  "bootm",  and  neither
knows  how  to  deal  with  the secoind argument of '-' - it tries to
convert it into a ramdisk address, which  reasults  in  the  :Loading
RAMDisk Image at 00000000" message, which fails.

> Also, more for curiosities sake, but I'm a little confused why I don't
> need to upload a dtb when using the kernel freescale supplies and many
> of the instructions I see online for different boards make no mention of

This is probably ancient code from the Stone Age as well, where the
Device Tree was not invented yet.


Best regards,

Wolfgang Denk

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