From: Segher Boessenkool <segher@kernel.crashing.org>
To: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Olof Johansson <olof@lixom.net>,
linuxppc-dev@ozlabs.org, David Woodhouse <dwmw2@infradead.org>,
cbe-oss-dev@ozlabs.org
Subject: Re: [Cbe-oss-dev] [PATCH] Implement check_legacy_ioport() on PS3
Date: Fri, 30 Mar 2007 15:44:02 +0200 [thread overview]
Message-ID: <d345e54b618b4b853cccf014b3b25589@kernel.crashing.org> (raw)
In-Reply-To: <1175219137.28116.2.camel@localhost.localdomain>
> I was thinking that we could have one single helper shared by most
> platforms who allow that legacy ISA crap which checks the device-tree
> for known ISA devices. That would cover PREP, CHRP and pSeries at
> least...
Make the helper check every device node under the ISA
node and translate the "reg" in there. If the requested
legacy I/O region is a subset of the union of all those,
allow the access, otherwise not. This should cover all
cases (well at least those with a valid device tree, heh).
Segher
next prev parent reply other threads:[~2007-03-30 13:44 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-03-30 0:02 [PATCH] Implement check_legacy_ioport() on PS3 David Woodhouse
2007-03-30 1:45 ` Olof Johansson
2007-03-30 1:43 ` David Woodhouse
2007-03-30 1:43 ` [Cbe-oss-dev] " Michael Ellerman
2007-03-30 1:47 ` Benjamin Herrenschmidt
2007-03-30 1:49 ` David Woodhouse
2007-03-30 1:45 ` Benjamin Herrenschmidt
2007-03-30 13:44 ` Segher Boessenkool [this message]
2007-04-06 21:32 ` Geoff Levand
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