[lkml]   [2006]   [Jan]   [7]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: Inclusion of x86_64 memorize ioapic at bootup patch
yhlu <> writes:

> andi,
> In LinuxBIOS, we don't set the MPS 0x467 and the AP still can be started by BSP.
> are these really needed for x86_64?
> Dprintk("Setting warm reset code and vector.\n");
> CMOS_WRITE(0xa, 0xf);
> local_flush_tlb();
> Dprintk("1.\n");
> *((volatile unsigned short *) phys_to_virt(0x469)) = start_rip >> 4;
> Dprintk("2.\n");
> *((volatile unsigned short *) phys_to_virt(0x467)) = start_rip & 0xf;
> Dprintk("3.\n");
> the STARTUP IPI should work well with MPS v1.4

There are very large x86 machines that a reset is sent to the remote
cpu and thus 0x40:0x67 and 0x40:0x67 becomes relevant.

YH you didn't do something foolish and put a linuxbios table below
0x500 did you?

To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to
More majordomo info at
Please read the FAQ at

 \ /
  Last update: 2006-01-07 13:50    [W:0.074 / U:2.508 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site