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@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@jpl.nasa.gov
MDS Flight Software