[coreboot] I've turned on paging as a test

[ron minnich]

Good point.


On Wed, Mar 12, 2014 at 10:12 AM, David Woodhouse <dwmw2 at infradead.org>wrote:

> On Mon, 2014-03-10 at 16:41 -0500, Jonathan A. Kollasch wrote:
> > On Mon, Mar 10, 2014 at 02:33:41PM -0700, ron minnich wrote:
> > > And locked out page zero. And we trap.
> > >
> > > So, first question, can we move X86_BDA_BASE to somewhere other than
> 0x400?
> > > Anyone know?
> >
> > The BIOS Data Area is not movable.
>
> The *physical* address of the BDA is not movable.
>
> However there are no constraints on what its *virtual* address should
> be, while you're running in your own code with paging turned on.
>
> Even if you generally have a 1:1 mapping of virt->phys addresses, you
> could still set up a mapping for the zero page at a different virtual
> address.
>
> --
> dwmw2
>
>
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