From: Jes Sorensen <jes@linuxcare.com>
To: Timur Tabi <ttabi@interactivesi.com>
Cc: Linux MM mailing list <linux-mm@kvack.org>,
Linux Kernel Mailing list <linux-kernel@vger.rutgers.edu>
Subject: Re: phys-to-virt kernel mapping and ioremap()
Date: 20 Jul 2000 21:06:20 +0200 [thread overview]
Message-ID: <d3wvigr58z.fsf@lxplus015.cern.ch> (raw)
In-Reply-To: Timur Tabi's message of "Thu, 20 Jul 2000 13:53:05 -0500"
>>>>> "Timur" == Timur Tabi <ttabi@interactivesi.com> writes:
Timur> ** Reply to message from Jes Sorensen <jes@linuxcare.com> on 20
Timur> Jul 2000 20:41:51 +0200
Timur> 1) Doesn't this mapping break the phys_to_virt and virt_to_phys
Timur> macros?
>> Those two macros are not defined on ioremap'ed regions so it is
>> irrelevant.
Timur> In that case, how do I do virt-to-phys and phys-to-virt
Timur> translations on the memory addresses for ioremap'ed regions?
The answer is that you don't because you don't need to. You use
ioremap to mape it and you usae real/writel to access the space. You
are not allowed to treat PCI shared memory as regular memory.
Jes
PS: Please fix your mailer, it eats the References lines which is
really broken.
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next prev parent reply other threads:[~2000-07-20 19:06 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20000720174852Z156962-31297+1037@vger.rutgers.edu>
2000-07-20 18:41 ` Jes Sorensen
2000-07-20 18:53 ` Timur Tabi
[not found] ` <20000720183534Z156966-31297+1096@vger.rutgers.edu>
2000-07-20 19:06 ` Jes Sorensen [this message]
2000-07-20 19:12 ` Ivan Passos
2000-07-20 18:06 Timur Tabi
2000-07-21 13:49 ` Jeff Garzik
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