Discrepancy in BAT mapping?

[Takashi Oe]

Hi,

In arch/ppc/kernel/prom.c, frame buffer is mapped via BAT with
_PAGE_GUARDED for 603, 604, 750, etc.  The same value is loaded to both
IBAT and DBAT in arch/ppc/kernel/head.S.

However, in arch/ppc/mm/init.c's setbat(), G bit is stripped off for IBAT.

I suppose it doesn't matter too much since it's frame buffer, but which is
correct technically?


Takashi Oe


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