[LinuxBIOS] Inclusion of x86_64 memorize ioapic at bootup patch

yhlu yhlu.kernel at gmail.com
Sat Jan 7 22:41:11 CET 2006

does stefan put the mptable in first 1K?

good way is put mptable 0xf0000:0x100000.


On 1/7/06, Eric W. Biederman <ebiederm at xmission.com> wrote:
> yhlu <yhlu.kernel at gmail.com> writes:
> > MPTABLE in LinuxBIOS is put from 0x20, if the system has too many cpu
> > and devices (slots)  the mptable will get bigger than 0x464, so it
> > will use 0x40:67....
> Then you or someone moved it.  The base in low memory was originally
> at 0x500, to avoid just these kinds of problems.
> > We need to put mptable to [0xf0000:0x100000] together with acpi
> > tables.
> Or move it up a few bytes.
> > and if it is bigger than 64k, then we have to put it on special
> > postion ...from 1K, and pass the posstion of mptable to the kernel via
> > command line.
> >
> > I will update the code in LinuxBIOS.
> Thanks.  It is always a good idea not to assign legacy regions of the
> address space new meanings.
> Eric
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