Re: [Xen-devel] help regarding ioremap_pt ....

[Himanshu Raj <rhim@xxxxxxxxxxxxx>]

Thanks for your response Keir. I do have to put some device specific code in
Xen. So for that, I will need to "hand build" the PTE and put it in the ioremap
area. Does it make any sense?

Best regards,
Himanshu

On Fri, Dec 23, 2005 at 03:38:13PM +0000, Keir Fraser wrote:
> 
> On 23 Dec 2005, at 14:41, Himanshu Raj wrote:
> 
> >I see a 4MB area being allocated paging_init for ioremap (that amounts 
> >to one
> >page of l2 entries on a 32-bit x86). However I don't see it being used 
> >anywhere.
> >Could someone point me to the place where it is being used.
> >
> >Reason I ask is because I need to map certain physical memory in 
> >"xen", some
> >device register's available in memory space. As I see, there is no 
> >direct
> >ioremap support in xen (atleast the comment says so!).
> 
> fixmap uses that area, but I think that's now the only thing that uses 
> that area in Xen. We removed dynamic ioremap when we removed device 
> drivers from Xen.
> 
>  -- Keir

-- 
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Himanshu Raj
PhD Student, GaTech (www.cc.gatech.edu/~rhim)
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