In message [ref] you wrote:

You should have ppcboot remap the IMMR to 0xF0000000 in the start of ppcboot
code. Otherwise it will interfere with Linux memory mapping. See this file for
all the info you need.

Right!

quoted

I am trying to get linux 2.4 running on an EST SBC8260.
It seems others have this board working correctly, so

Probably these others just use the  PPCBoot  standard  configuration,
and you changed (read: broke) it?

quoted

It works up to executing the rfi in turn_on_mmu, but
it doesn't seem to reach start_here.

I'm not sure what makes you think this is the case. Did  you  by  any
chance   try  to  sngle-step  with  a  JTAG  debugger  over  the  RFI
instruction?

This will not work.

quoted

bdinfo
------------------------
memstart    = 0x00000000
memsize     = 0x02000000
flashstart  = 0xfff00000
flashsize   = 0x00400000
flashoffset = 0x00040000
sramstart   = 0x00000000
sramsize    = 0x00000000
immr_base   = 0x0f000000

^^^^^^^^^^^^^

This is wrong. It should be 0xF0000000  as  it  is  in  the  standard
configuration  for  the  SBC8260  board  that  comes with the PPCBoot
sources. Don't change it.

Wolfgang Denk

--
Software Engineering:  Embedded and Realtime Systems,  Embedded Linux
Phone: (+49)-8142-4596-87  Fax: (+49)-8142-4596-88  Email: wd@denx.de
The explanation requiring the fewest assumptions is the  most  likely
to be correct.                                    -- William of Occam

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