[okl4-developer] elfweaver with several IO regions per server

[Lukas HANEL]

Hi Geoffrey,

concerning this problem, I want to better understand the issue and ask 
you whether there is no work-around.

As I understand, in the old driver framework, drivers would use 
hardware_back_memsection to get access to a physical page.

In the new version, I cannot find a call to this function anywhere. 
Neither in the driver implementation, nor in the virtual server, nor in 
some library.
(arm-linux-objdump -x build/iguana/bin/vserial |grep 
hardware_back_memsection --> empty)

I conclude that the build system is creating some permission map 
(bootinfo?) which is then interpreted by the kernel or iguana bootup. 
Using this map every driver server gets the IO region mapping it needs.
Is is like this?

Is there a way to assign IO resoures to other VMs? E.g. OKLinux?

Or will a call to hardware_back_memsection still work?

thanks,
Lukas Hänel

Geoffrey Lee wrote:
> On Thu, Jun 12, 2008 at 10:33:59AM +0200, Lukas HANEL wrote:
>> Hi,
> 
> Hi Lukas
> 
> Thanks for looking further into the problem.  Your analysis about the
> fact that you cannot have multiple memory mapped i/o regions
> is correct, and I am able to reproduce the problem from my end.
> This appears to be an unfortunate limitation in the build system 
> right now.
> 
> I'll tag this into our bug report database and keep tracking it.
> Rest assured that it will be fixed in a future release.
> 
> Again, thanks for the detailed bug report.
> 
> 	-gl
>