7400 mmu_init problem

Greg Griffes ggg at ieee.org
Fri Apr 5 20:45:08 EST 2002


I am trying to port linuxppc_2_4_devel to a custom 750 design.
Using the GNU binutils and gcc-core-2.95.3 tools.

After ppc_md.progress reports "MMU: exit" in mm/init.c::mmu_init()
the kernel goes into panic() and dies there.

I have been using a lousy, unreliable JTAG debugger. Today, I have a
BDI2000 and will be learning how to use it and GDB :-))

Has anyone experienced this in the past?
Does anyone have a rough idea of the cause of the problem?
My guess is that it could be many possible problems, but, it has to
be something that I did wrong in <my>_setup.c I haven't changed
much in the kernel itself.

The low level IO is mapped at 0xEC00_0000; could that be a problem?

The kernel is configured very slim, could I be excluding necessary

Thanks for listening,

Greg Griffes

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