Subject: Operating system question

From: Rabeeh Khoury <[email-masked]>
Date: Tue, 30 Sep 2003 21:53:12 +0300

Hi All,

I have a question withregards WIMG MMU settings of page tables / BATs.
Is there any reason why setting the M bit (coherency) on an IO
region (cache inhibited and guarded) ?
Does anyone expect what is the result of doing so ?

I'v seen in the Linux code for PPC that on IO region the M bit is never
set - but what about firmwares ? other operating system ?

Thank you,
Rabeeh

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