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

San Mehat
2007-08-20T17:21:16Z

On 8/20/07, H. Peter Anvin <hpa@zytor.com> 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.
>
> *Sigh.*
>

Actually some implementations do run PEI in 32 bit and DXE/BDS in 64
bit; I'm not sure what Macintosh does though..

-san