about Conventional Memory Region

Zhang Yinfei zhangyinfei at gmail.com
Mon Jul 7 16:10:28 CEST 2008


Hi Adam,

Thanks for the reply. But I cannot find any symbol called find_kip in the
fiasco source code. For bootstrap, do you mean those source files in
kernel/fiasco/src/boot/ia32/ ?I just want to know where is the source code
which start the KIP from scratch . Thanks.

Best Regards,
Zhang Yinfei




On 7/7/08, l4-hackers-request at os.inf.tu-dresden.de <
l4-hackers-request at os.inf.tu-dresden.de> wrote:
>
>
> Date: Sun, 6 Jul 2008 23:51:46 +0200
> From: Adam Lackorzynski <adam at os.inf.tu-dresden.de>
> Subject: Re: about Conventional Memory Region
> To: l4-hackers at os.inf.tu-dresden.de
> Message-ID: <20080706215146.GJ7899 at os.inf.tu-dresden.de>
> Content-Type: text/plain; charset=iso-8859-1
>
> Hi,
>
> On Sun Jul 06, 2008 at 21:49:03 +0800, Zhang Yinfei wrote:
> > As in *Mem_region Kip::last_free() const*, the function try to find the
> > highest *Conventional* memory region's physical address. (I guess it gets
> > physical memory bottom in the first time?).  However in *void
> > Kip_init::init(),* I only see one Conventional memory region which stores
> > virtual address. Where does last_free() get the physical address??
> >
> > And in bootstrap, I see it manipulate KIP. I thought at that time, KIP is
> > not initialize, because bootstrap runs before Fiasco Startup, where
> > Kip_init::init() is called.
>
> The KIP data structure is indeed in the kernel binary but it is filled
> with memory descriptors by bootstrap. I.e. look for find_kip in
> bootstrap which looks for the KIP in the kernel. Kip_init::init() does
> setup a few things in the KIP but it does not start from scratch with
> the memory descriptors.
>
>
>
> Adam
> --
> Adam                 adam at os.inf.tu-dresden.de
> Lackorzynski         http://os.inf.tu-dresden.de/~adam/
>
>
>
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> End of l4-hackers Digest, Vol 63, Issue 5
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