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From: Misbah khan <misbah_khan@engineer.com>
To: linuxppc-embedded@ozlabs.org
Subject: Re: Difference between ioremap() and phy_to_virt() Kernel function
Date: Mon, 22 Oct 2007 21:08:19 -0700 (PDT)	[thread overview]
Message-ID: <13357088.post@talk.nabble.com> (raw)
In-Reply-To: <200710221304.44275.arnd@arndb.de>



Thanks Arnd 

But i wish to know that could i use phy_to_virt() function in place io
ioremap() ????? And could you give me an example where we could use
phy_to_virt(). ioremap() implementation i have already done.

---Misbah


Arnd Bergmann wrote:
> 
> On Monday 22 October 2007, Misbah khan wrote:
>> Could you Please let me know what is the difference between ioremap() and
>> phy_to_virt() function being provided by the Kernel.
> 
> ioremap gives you a new mapping for I/O addresses that you can access
> with functions like in_be32 and the like.
> 
> phy_to_virt() is rarely used at all, it only serves to convert a physical
> address for main memory (RAM) into the address used inside of the kernel.
> 
> 	Arnd <><
> _______________________________________________
> Linuxppc-embedded mailing list
> Linuxppc-embedded@ozlabs.org
> https://ozlabs.org/mailman/listinfo/linuxppc-embedded
> 
> 

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View this message in context: http://www.nabble.com/Difference-between-ioremap%28%29-and-phy_to_virt%28%29-Kernel-function-tf4669833.html#a13357088
Sent from the linuxppc-embedded mailing list archive at Nabble.com.

  reply	other threads:[~2007-10-23  4:08 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-10-22 10:03 Difference between ioremap() and phy_to_virt() Kernel function Misbah khan
2007-10-22 11:04 ` Arnd Bergmann
2007-10-23  4:08   ` Misbah khan [this message]
2007-10-23  9:11     ` Arnd Bergmann

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