From: arnd@arndb.de (Arnd Bergmann)
To: linux-arm-kernel@lists.infradead.org
Subject: ioremap to a specific virtual address
Date: Mon, 2 Apr 2012 07:31:14 +0000 [thread overview]
Message-ID: <201204020731.14506.arnd@arndb.de> (raw)
In-Reply-To: <alpine.LFD.2.02.1204012111260.24151@xanadu.home>
On Monday 02 April 2012, Nicolas Pitre wrote:
> > 0xf1300000-0xf1a00000 is the virtual address. 0x13000000-0x21000000
> > is the physical address. That's a span of 224MB. How do the page
> > table entries work on ARM? I thought we only got 1MB per entry. So I
> > need seven entries to span the range with the individual maps. I'd
> > need 224 entries to cover the entire region. Or can we make make the
> > page table entries any size we want?
>
> You can't. Arnd probably didn't notice that the physical range is not
> contiguous. What you have is pretty optimal.
Right, I didn't realize they were laid out like this in the physical space.
Arnd
prev parent reply other threads:[~2012-04-02 7:31 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-03-23 0:23 ioremap to a specific virtual address jonsmirl at gmail.com
2012-03-23 4:00 ` Nicolas Pitre
2012-03-23 4:17 ` jonsmirl at gmail.com
2012-03-23 4:28 ` Nicolas Pitre
2012-03-23 13:25 ` jonsmirl at gmail.com
2012-03-23 14:07 ` Arnd Bergmann
2012-03-23 14:32 ` jonsmirl at gmail.com
2012-03-23 14:49 ` Arnd Bergmann
2012-03-23 15:20 ` Arnd Bergmann
2012-03-23 18:28 ` jonsmirl at gmail.com
2012-03-23 19:31 ` Arnd Bergmann
2012-03-24 1:14 ` jonsmirl at gmail.com
2012-03-25 17:34 ` Arnd Bergmann
2012-03-26 8:47 ` Arnd Bergmann
2012-03-26 13:11 ` jonsmirl at gmail.com
2012-03-26 11:21 ` jonsmirl at gmail.com
2012-03-23 14:52 ` Roland Stigge
2012-03-23 15:05 ` jonsmirl at gmail.com
2012-03-23 15:12 ` Roland Stigge
2012-03-31 23:12 ` jonsmirl at gmail.com
2012-03-31 23:52 ` Nicolas Pitre
2012-04-01 0:08 ` jonsmirl at gmail.com
2012-04-01 19:46 ` Arnd Bergmann
2012-04-01 21:41 ` jonsmirl at gmail.com
2012-04-02 1:18 ` Nicolas Pitre
2012-04-02 7:31 ` Arnd Bergmann [this message]
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