Re: [Xen-devel] ioremap failing in linux guest

[Anish Bhatt <anish@xxxxxxxxxxxxx>]

The driver for the network processor that I am using does an ioremap 
call to map memory previously reserved using the mem & memap kernel 
parameters. for eg. if I reserve memory using memmap=384M$512M, it is 
calling ioremap(384,512) (with appropriate conversion to bytes) and 
later using the returned address to setup its queues.
-Anish

Jeremy Fitzhardinge wrote:
> Anish Bhatt wrote:
> > Is there an API for converting pseudophysical addresses to machine 
> > addresses or possibly sample code somewhere ?
> What are you trying to achieve?  ioremap is only valid to use on 
> device memory anyway, so you shouldn't be in a position to use it 
> unless you've already got machine addresses in hand (and they're going 
> to be machine addresses with no existing pfn translation).
>    J

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