RE: Enable apic ext id to use 256 apic id for AMD64

[YhLu]

For dual core and lifting apic id, you can not just use apic id as node id.

And you have to use
Lapicid() & 0xf

Or cupid to get it.

Regards

YH

-----Original Message-----
From: Li-Ta Lo [mailto:[e-mail]] 
Sent: Monday, January 10, 2005 2:14 PM
To: YhLu
Cc: Stefan Reinauer; Ronald G. Minnich; LinuxBIOS; Andi Kleen;
[e-mail]; [e-mail]; [e-mail]; Matt
Domsch
Subject: RE: Enable apic ext id to use 256 apic id for AMD64

On Mon, 2005-01-10 at 15:18, YhLu wrote:
> Please refer s4882 to change the MB that you support.
>
> nodeid = lapicid() & 0xf;
>
> orm with initial apic id
>      nodeid = (cpuid_ebx(1) >> 24) & 0xf;

What is this thing all about ?

Ollie

Enable apic ext id to use 256 apic id for AMD64

[Li-Ta Lo]

On Mon, 2005-01-10 at 15:27, YhLu wrote:
> For dual core and lifting apic id, you can not just use apic id as node id.
>
> And you have to use
> Lapicid() & 0xf
>
> Or cupid to get it.
>
> Regards
>
> YH

It breaks Expansion ROM loading from PCI slot to the main memory.
The old code does not have this execprtion.

pci_rom_load, copying VGA ROM Image from f8100000 to c0000, 8000 bytes
Unexpected Exception: 2 @ 10:00009526 - Halting
Code: 0 eflags: 00000083
eax: 000000ff ebx: 00008000 ecx: 000c0000 edx: 00000051
edi: 0001acd0 esi: f8100000 ebp: 00037f74 esp: 00037f6c

Ollie
> -----Original Message-----
> From: Li-Ta Lo [mailto:[e-mail]] 
> Sent: Monday, January 10, 2005 2:14 PM
> To: YhLu
> Cc: Stefan Reinauer; Ronald G. Minnich; LinuxBIOS; Andi Kleen;
> [e-mail]; [e-mail]; [e-mail]; Matt
> Domsch
> Subject: RE: Enable apic ext id to use 256 apic id for AMD64
>
> On Mon, 2005-01-10 at 15:18, YhLu wrote:
> > Please refer s4882 to change the MB that you support.
> >
> > nodeid = lapicid() & 0xf;
> >
> > orm with initial apic id
> >      nodeid = (cpuid_ebx(1) >> 24) & 0xf;
>
> What is this thing all about ?
>
> Ollie