From: Matthew Wilcox <willy@debian.org>
To: Randolph Chung <randolph@tausq.org>
Cc: Jochen Friedrich <jochen@scram.de>,
linux-tr@linuxtr.net,
HP900 PARISC mailing list <parisc-linux@lists.parisc-linux.org>
Subject: Re: [parisc-linux] IBM TR patch
Date: Tue, 15 Jan 2002 18:18:41 +0000 [thread overview]
Message-ID: <20020115181841.G19567@parcelfarce.linux.theplanet.co.uk> (raw)
In-Reply-To: <20020115181158.GT3247@tausq.org>; from randolph@tausq.org on Tue, Jan 15, 2002 at 10:11:58AM -0800
On Tue, Jan 15, 2002 at 10:11:58AM -0800, Randolph Chung wrote:
> > Additionally, i added a switch to turn off IPv4 summing. This might be
> > needed for IPv6 and is absolutely necessary on HP PARISC platform with the
> > current broken ioremap implementation. The IPv4 summing is the only place
> > in the driver that accesses memory directly without the readX or
> > memcpy_fromio macros.
>
> How is ioremap broken? (Just curious). From what I understand ioremap is
> currently a nop in the parisc-linux vm/io design.
it's not broken, the assumptions in ibmtr are. after you've ioremapped
a region, you can call readb/writeb on it. ibmtr assumes you can just
do direct memory accesses. now, this is something we want to fix,
but it's not a bug in the PA code.
--
Revolutions do not require corporate support.
next prev parent reply other threads:[~2002-01-15 18:18 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-01-14 19:53 [parisc-linux] IBM TR patch Jochen Friedrich
2002-01-15 18:11 ` Randolph Chung
2002-01-15 18:18 ` Matthew Wilcox [this message]
2002-01-15 19:12 ` Jochen Friedrich
2002-01-15 19:07 ` Jochen Friedrich
2002-01-15 22:10 ` Daniel Engstrom
2002-01-16 1:23 ` Randolph Chung
2002-01-16 20:20 ` Jochen Friedrich
2002-01-19 12:20 ` Daniel Engstrom
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