From: Deepak Saxena <dsaxena@plexity.net>
To: Slade Maurer <smaurer@teja.com>
Cc: Dave <dave.jiang@gmail.com>,
linux-kernel@vger.kernel.org, torvalds@osdl.org,
linux@arm.linux.org.uk, drew.moseley@intel.com
Subject: Re: clean way to support >32bit addr on 32bit CPU
Date: Mon, 10 Jan 2005 16:00:50 -0800 [thread overview]
Message-ID: <20050111000050.GA7958@plexity.net> (raw)
In-Reply-To: <41E3176F.6000809@teja.com>
On Jan 10 2005, at 16:01, Slade Maurer was caught saying:
> Also, it would be nice to have PTEs to represent the upper 4GB such that
> it can be mmapped to user space. PAE handled this in and it would be
> great to have it in ARM MMU36 as well.
Not doable. I believe PAE allows for normal 4K pages to be used when
mapping > 32-bits. XSC3 and ARMv6 only allow for > 32 bit addresses
when using 16MB pages (supersections), so we need to instead use
the hugetlb approach.
~Deepak
--
Deepak Saxena - dsaxena@plexity.net - http://www.plexity.net
If you complain once more, you'll meet an army of me. - Bjork
next prev parent reply other threads:[~2005-01-11 0:27 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-01-10 23:34 clean way to support >32bit addr on 32bit CPU Dave
2005-01-11 0:01 ` Slade Maurer
2005-01-11 0:00 ` Deepak Saxena [this message]
2005-01-11 0:35 ` Slade Maurer
2005-01-11 0:04 ` Roland Dreier
2005-01-11 0:09 ` Linus Torvalds
2005-01-11 0:28 ` Randy.Dunlap
2005-01-11 1:30 ` Linus Torvalds
2005-01-11 2:05 ` William Lee Irwin III
2005-01-11 3:38 ` Randy.Dunlap
2005-01-11 17:39 ` Randy.Dunlap
2005-01-11 18:18 ` Linus Torvalds
2005-01-11 19:40 ` Dave
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