[U-Boot-Users] Linux couldn't start up

[Anatolij Gustschin]

Hi Robert,

Robert wrote:
> Hi,
>     I make a linux uImage with command "make uImage" ,
>  and linux kernel can start up after downloading it into the
> target board, but now I want to generate uImage by vmlinux
> with mkimage, not by "make uImage",so I do it as follows:
> 1)arm-none-linux-gnueabi-objcopy -O binary -R .note -R .comment \
>                 -S /home/linux-2.6.12/vmlinux /home/temp/vmlinux.bin
> 2)gzip -9  /home/temp/vmlinux.bin

you compressed the "vmlinux.bin" file here, but didn't specify the
compression type later by the "-C" option of "mkimage".

> 3)mkimage  -A arm -O linux  -T kernel -C none \
					^^^^^^^
>         -a 00008000 -e 00008000 \
>         -n 'Linux-2.6.12.6-arm1' -d /home/temp/vmlinux.bin.gz 
> /home/temp/uImage

please try it again with "-C gzip" option.

> At last, I load uImage to ram to run, but the following message happens:
>  
> Marvell>> tftp 0x400000 uImage
> Using egiga0 device
> TFTP from server 192.168.0.53; our IP address is 192.168.0.54
> Filename 'uImage'.
> Load address: 0x400000
> Loading: #################################################################
>          #################################################################
>          #################################################################
>          #################################################################
>          #################################################################
>          ##########
> done
> Bytes transferred = 1710086 (1a1806 hex)
> Marvell>> bootm 0x400000
> ## Booting image at 00400000 ...
>    Image Name:   Linux-2.6.12.6-arm1
>    Created:      2008-02-03  17:12:54 UTC
>    Image Type:   ARM Linux Kernel Image (uncompressed)
                                           ^^^^^^^^^^^^
>    Data Size:    1710022 Bytes =  1.6 MB
>    Load Address: 00008000
>    Entry Point:  00008000
>    Verifying Checksum ... OK
> OK
>  
> Starting kernel ... 
> undefined instruction
> pc : [<ffffffff>]          lr : [<00249274>]
> sp : 001ff16c  ip : ffffffff     fp : 001ff694
> r10: 00000000  r9 : 002570a8     r8 : 001fffd4
> r7 : 000000ff  r6 : 0027ee58     r5 : 00000000  r4 : 0027ee58
> r3 : 00008000  r2 : 00000100     r1 : 0000020e  r0 : 00000000
> Flags: NZCV  IRQs off  FIQs off  Mode SYS_32
> Resetting CPU ...
>  
> Can anybody tell me what happend?

The image header describes the image as uncompressed, but really
it isn't. Uncompressed code can't be executed.

Best regards,

Anatolij

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