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From: Dan Malek <dan@embeddededge.com>
To: Marcelo Tosatti <marcelo.tosatti@cyclades.com>
Cc: linux-ppc-embedded <linuxppc-embedded@ozlabs.org>
Subject: Re: map_page() and pinned TLB entries
Date: Thu, 16 Jun 2005 17:13:19 -0400	[thread overview]
Message-ID: <8efaee2824f500e906c2c05526ea3214@embeddededge.com> (raw)
In-Reply-To: <20050616144739.GA1559@logos.cnet>


On Jun 16, 2005, at 10:47 AM, Marcelo Tosatti wrote:

> What would be an elegant way of dealing with this? We can insert
> a conditional there such that only addresses not covered
> by other mappings (in this case the 8Mbyte entry) get flushed.

I'd like to make _tlbie() a macro on 8xx that simply tests the VA
and doesn't invalidate anything in the pinned space.  Of course,
the code shouldn't be doing this anyway, and I think this
should be treated as a bug if it happens.  If the Linux VM
thinks it needs to be doing this, pinned space isn't going to work.
The _tlbie() is an exported symbol, I suspect for MOL, so
we have to accommodate that.

Thanks.


	-- Dan

  reply	other threads:[~2005-06-16 21:13 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2005-06-16 14:47 map_page() and pinned TLB entries Marcelo Tosatti
2005-06-16 21:13 ` Dan Malek [this message]
2005-06-16 16:47   ` Marcelo Tosatti
2005-06-16 22:17     ` Dan Malek

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