Re: [PATCH 0/3] x86_64 EFI runtime service support

Matthew Garrett
2007-08-20T20:14:45Z

On Mon, Aug 20, 2007 at 10:05:11AM -0700, H. Peter Anvin wrote:
> Yinghai Lu wrote:
> >
> > someone told me that EFI PEI will be 32 bit ( for mem etc
> > initialization), and after that will be 64 bit, so the Run time
> > service will be 64 bit only, and it will only support 64 bit OS with
> > EFI. and they have another mode to emulate the legacy BIOS to boot
> > 32bit OS.
> >
>
> That seems unlikely for e.g. the existing Macs already in the field.

In which direction? The existing Macs will boot a 32 (or 16) bit OS
using legacy BIOS emulation. I've no idea if their EFI is 32 or 64 bit,
though.

--
Matthew Garrett | mjg59@srcf.ucam.org