[DNX#2006033142000927] [U-Boot-Users] boot linux from memory

[DENX Support System]

Hello list,

inside the automatic U-Boot patch tracking system a new ticket
[DNX#2006033142000927] was created:

<snip>
> I have u-boot work with memory only (my flash driver doesnot work yet),
> so I try to load linux to memory and give a try, but I find uImage have
> 40 bytes header, how I can boot linux by using u-boot command-line? Do I
> misunderstand something here?
> 
> Following is what I did:
> ==================================================
> BRCM5001 # loadb 06008000
> BRCM5001 # md 06008000
> 06008000: 27051956 39440bb6 43d6c107 000a01a8    '..V9D..C.......
> 06008010: 06008000 06008000 73966e28 05020200    ........s.n(....
> 06008020: 4c696e75 782d322e 362e3135 00000000    Linux-2.6.15....
> 06008030: 00000000 00000000 00000000 00000000    ................
> 06008040: e1a00000 e1a00000 e1a00000 e1a00000    ................
> 06008050: e1a00000 e1a00000 e1a00000 e1a00000    ................
> 06008060: ea000002 016f2818 00000000 000a01a8    .....o(.........
> 06008070: e1a07001 e3a08000 e10f2000 e3120003    ..p....... .....
> 06008080: 1a000001 e3a00017 ef123456 e10f2000    ..........4V.. .
> 06008090: e38220c0 e121f002 ee110f10 e3800080    .. ..!..........
> 060080a0: ee010f10 00000000 00000000 00000000    ................
> 060080b0: 00000000 00000000 00000000 00000000    ................
> 060080c0: e28f00c8 e890307e e0500001 0a00000a    ......0~.P......
> 060080d0: e0855000 e0866000 e08cc000 e0822000    ..P...`....... .
> 060080e0: e0833000 e08dd000 e5961000 e0811000    ..0.............
> 060080f0: e4861004 e156000c 3afffffa e3a00000    .....V..:.......
> ==================================================
> If I try to boot from 06008000, I got following:
> BRCM5001 # bootm 06008000                         
> ## Booting image at 06008000 ...                                
>    Image Name:   Linux-2.6.15                             
>    Image Type:   ARM Linux Kernel Image (uncompressed)
> 
>    Data Size:    655784 Bytes = 640.4 kB
> 
>    Load Address: 06008000                         
>    Entry Point:  06008000                         
>    Verifying Checksum ... OK                            
>    XIP Kernel Image ... OK                          
> 
> Starting kernel ...                   
> 
> undefined instruction                     
> pc : [<06008004>]          lr : [<06f8c324>]
> 
> sp : 06f3fb58  ip : 00000001     fp : 00000002
> 
> r10: 00000002  r9 : 06f3fcf4     r8 : 06f3ffdc
> 
> r7 : 06f9082c  r6 : 06f8d744     r5 : 06f9082c  r4 : 00000000
> 
> r3 : 06008000  r2 : 00000100     r1 : 000001c4  r0 : 00000000
> 
> Flags: nZCv  IRQs off  FIQs off  Mode SVC_32as for 'help'
> 
> auto
> Resetting CPU ...   
> ==================================================
> If I try to jump the header, I got following:
> BRCM5001 # go 06008040
> ## Starting application at 0x06008040 ...
> Uncompressing Linux............................................. done,
> booting t
> he kernel.
> 
> Thanks for any advice.
> 
> Regards.
> Xuezhang.
> 
> 
> 
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</snip>

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