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From: James Bottomley <James.Bottomley@SteelEye.com>
To: Russell King <rmk+pcmcia@arm.linux.org.uk>
Cc: linux-pcmcia@lists.infradead.org,
	parisc-linux@lists.parisc-linux.org,
	Kyle McMartin <kyle@parisc-linux.org>
Subject: Re: [parisc-linux] Re: [PATCH] PCMCIA: Disable probing on parisc
Date: Tue, 06 Dec 2005 08:36:48 -0500	[thread overview]
Message-ID: <1133876209.3267.2.camel@mulgrave> (raw)
In-Reply-To: <20051206093643.GA1706@flint.arm.linux.org.uk>

On Tue, 2005-12-06 at 09:36 +0000, Russell King wrote:
> I don't think you've fully understood what I've been saying.
> When we try to do memory probing, we setup a mapping in the same
> way that we setup a mapping to read the CIS from the card.

Yes, I do.  On PARISC, memory I/O ranges are directed.  If you program
the CIS to respond outside the directed range of its parent, the I/O
transaction will never get through because the direction is done by the
parent bus (which you aren't programming).  This then causes a HPMC
because no entity on the runway bus responds to the memory read.

James


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  reply	other threads:[~2005-12-06 13:36 UTC|newest]

Thread overview: 29+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2005-12-04  6:04 [parisc-linux] [PATCH] PCMCIA: Disable probing on parisc Kyle McMartin
2005-12-04 10:33 ` [parisc-linux] " Russell King
2005-12-04 17:52   ` Kyle McMartin
2005-12-05 21:32   ` James Bottomley
2005-12-05 22:03     ` Russell King
2005-12-06  0:45       ` James Bottomley
2005-12-06  9:36         ` Russell King
2005-12-06 13:36           ` James Bottomley [this message]
2005-12-07 12:21             ` Dominik Brodowski
2005-12-07 14:01               ` James Bottomley
2005-12-11  6:50               ` Grant Grundler
2005-12-11 15:14                 ` James Bottomley
2005-12-11 17:50                   ` Grant Grundler
2005-12-11 18:01                     ` James Bottomley
2005-12-11 18:55                       ` Helge Deller
2005-12-11 19:09                         ` Matthew Wilcox
2005-12-11 19:49                         ` Dominik Brodowski
2005-12-11 20:37                         ` James Bottomley
2005-12-11 22:35                           ` Helge Deller
2005-12-12  7:30                             ` Grant Grundler
2005-12-12 14:45                               ` James Bottomley
2005-12-12 21:17                                 ` Helge Deller
2005-12-13 22:28                                   ` Grant Grundler
2005-12-11 19:48                       ` Dominik Brodowski
2005-12-11 20:23                         ` James Bottomley
2005-12-06  8:14       ` Grant Grundler
2005-12-06  9:49         ` Russell King
2005-12-06 16:46           ` Grant Grundler
2005-12-11  7:41           ` Grant Grundler

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