Subject: Re: Difference between ioremap() and phy_to_virt() Kernel function

From: Misbah khan <[email-masked]>
Date: Mon, 22 Oct 2007 21:08:19 -0700 (PDT)

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 <><
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