linux-kernel - Re: Reading a physical memory location

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <1a297b360707101502t2670f0d7g5197b9c32ecb967c@mail.gmail.com>
Date:	Wed, 11 Jul 2007 02:02:23 +0400
From:	"Manu Abraham" <abraham.manu@...il.com>
To:	"vraghavan3@...l.gatech.edu" <vraghavan3@...l.gatech.edu>
Cc:	"Nobin Mathew" <nobin.mathew@...il.com>,
	linux-kernel@...r.kernel.org
Subject: Re: Reading a physical memory location

On 7/10/07, vraghavan3@...l.gatech.edu <vraghavan3@...l.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
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/