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From: "Manu Abraham" <abraham.manu@gmail.com>
To: "vraghavan3@mail.gatech.edu" <vraghavan3@mail.gatech.edu>
Cc: "Nobin Mathew" <nobin.mathew@gmail.com>, linux-kernel@vger.kernel.org
Subject: Re: Reading a physical memory location
Date: Wed, 11 Jul 2007 02:02:23 +0400	[thread overview]
Message-ID: <1a297b360707101502t2670f0d7g5197b9c32ecb967c@mail.gmail.com> (raw)
In-Reply-To: <1184091142.4693cc06850f7@webmail.mail.gatech.edu>

On 7/10/07, vraghavan3@mail.gatech.edu <vraghavan3@mail.gatech.edu> wrote:
>
> Thanks for the quick reply. But I was wondering as to why I would have to map
> the physical address to the virtual address when I know that the string is
> permanently in the physical memory because its loaded into flash. Is there a way
> to directly read from the physical memory location? Also, do the functions
> ioremap() and readl(va) work when called from within a kernel module?
>

Of course, if you look at almost any of the memory mapped device
drivers, you will find that ioremap/readl/writel is the backbone of
your infrastructure.


Manu

  reply	other threads:[~2007-07-10 22:02 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-07-09 19:47 vraghavan3
2007-07-09 22:39 ` Nobin Mathew
2007-07-10 18:12   ` vraghavan3
2007-07-10 22:02     ` Manu Abraham [this message]
2007-07-11  5:43       ` Nobin Mathew
2007-07-11  8:11         ` Manu Abraham
2007-07-11  8:14           ` Nobin Mathew
2007-07-11  8:50             ` Manu Abraham
2007-07-11  8:57               ` Nobin Mathew
2007-07-11 10:00               ` Clemens Koller
2007-07-24 12:48     ` Helge Hafting

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