PPC Privileged mode

[Benjamin Herrenschmidt]

On Fri, Feb 19, 1999, Steven Bytnar <s-bytnar at uiuc.edu> wrote:


>How do I exit cleanly from PPC supervisor mode to MacOS? I am trying 
>to work with the code in BootX, but it was meant to execute the 
>kernel and never return. My purpose is only to read and write to 
>supervisor read/writable registers on the chip without destroying 
>MacOS.

Use the code in "GrabG3CacheSettings". It uses a different mecanism by
patching MacOS "sc" exception handler.

-- 
           E-Mail: <mailto:bh40 at calva.net>
BenH.      Web   : <http://calvaweb.calvacom.fr/bh40/>




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