Re: [coreboot] suspend/resume in v3

[Stefan Reinauer]

Kevin O'Connor wrote:
> Hi,
>
> On Sun, Sep 07, 2008 at 11:40:51PM +0200, Rudolf Marek wrote:
> > > CAR will write to memory locations below 1M. There are three ways to
> > > cope with that:
> > > Back up that area during suspend and restore it as last instruction
> > >
> > > of resume.
> > > 2. Declare the CAR area (48 kB) as reserved memory.
> >
> > Imho this is OK, and easiest.
>
> I don't think one can mark 48KB reserved below 0xA0000.  I've found
> that boot loaders are picky about any reserved memory below 1MB.
>
> It's normal to reserve the ebda (typically 0x9fc00 to 0xa0000), but I
> seem to recall reading that an EBDA over 16KB will confuse some
> programs.  Using the EBDA area would also likely break SeaBIOS.

Isn't BDA from 0x400 to 0x500 and EBDA from 0x500 on?

Stefan