[U-Boot-Users] Offset beginning of flash image?

[Timothy Canham]

The problem is that PPCBoot doesn't support the rsh method of booting 
kernels, so we are stuck w/ tftpboot. We can't use that for our vxworks 
kernels.

Wolfgang Denk wrote:

>In message <3E2873F9.5050107 at jpl.nasa.gov> you wrote:
>  
>
>>I am trying to load two boot loaders on to the flash at once. We want to 
>>put the vxworks bootloader first, then jump to the beginning of the 
>>ppcboot loader at a higher address in the flash when we need to. What 
>>    
>>
>
>This will not work. PPCBoot  /  U-Boot  expect  to  find  a  "virgin"
>system, i. e. to be started from the reset entry point.
>
>
>I don't say it can't be done, but you have to understand exactly  how
>the  initialization sequence works, and what already has been done by
>your other boot loader.
>
>
>I recommend to use just U-Boot,  and  dump  the  VxWorks  bootloader.
>U-Boot can boot VxWorks fine, too.
>
>
>Best regards,
>
>Wolfgang Denk
>
>  
>

-- 
Timothy K. Canham
Jet Propulsion Laboratory
Pasadena, CA
Timothy.Canham at jpl.nasa.gov
MDS Flight Software


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