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From: Jesse Barnes <jbarnes@sgi.com>
To: linux-ia64@vger.kernel.org
Subject: pgprot_writecombine & shub 1.x
Date: Tue, 11 Jan 2005 20:00:02 +0000	[thread overview]
Message-ID: <200501111200.02504.jbarnes@sgi.com> (raw)

SGI sn2 systems based on SHub 1.x chipsets don't support the write combine 
attribute on PIO space, only regular memory space.  This is a problem because 
drivers often expect to map PIO space with certain memory attributes (e.g. 
the PCI mmap code, drm, fbmem, acorn video).  None of the calls to 
pgprot_writecombine are in performance critical paths, so would making 
pgprot_writecombine into a machine vector would be ok?  Comments?

Thanks,
Jesse

             reply	other threads:[~2005-01-11 20:00 UTC|newest]

Thread overview: 33+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2005-01-11 20:00 Jesse Barnes [this message]
2005-01-11 22:12 ` pgprot_writecombine & shub 1.x David Mosberger
2005-01-11 22:35 ` Jesse Barnes
2005-01-12 18:51 ` Jim Hull
2005-01-12 19:31 ` Hugo Kohmann
2005-01-12 19:32 ` Jesse Barnes
2005-01-12 21:54 ` David Mosberger
2005-01-19 17:28 ` Jesse Barnes
2005-01-19 17:53 ` David Mosberger
2005-01-19 17:56 ` Jesse Barnes
2005-01-19 18:04 ` David Mosberger
2005-01-19 18:16 ` Luck, Tony
2005-01-19 18:21 ` Jesse Barnes
2005-01-19 18:38 ` Luck, Tony
2005-01-19 19:33 ` Bjorn Helgaas
2005-01-19 21:51 ` Jesse Barnes
2005-01-19 22:00 ` Luck, Tony
2005-01-19 22:03 ` Jesse Barnes
2005-01-19 22:07 ` David Mosberger
2005-01-19 22:16 ` Jesse Barnes
2005-01-19 22:20 ` David Mosberger
2005-01-19 22:22 ` Jesse Barnes
2005-01-19 22:25 ` David Mosberger
2005-01-19 22:36 ` Jesse Barnes
2005-01-19 22:39 ` David Mosberger
2005-01-19 22:53 ` Jesse Barnes
2005-01-20  9:03 ` Jes Sorensen
2005-01-20 13:43 ` Hugo Kohmann
2005-01-20 16:42 ` Jesse Barnes
2005-01-20 16:45 ` Jesse Barnes
2005-01-20 17:17 ` David Mosberger
2005-01-21  9:00 ` Jes Sorensen
2005-01-21  9:01 ` Jes Sorensen

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