Re: Problems with AMD64 and 8 GB RAM?

From: Greg 'groggy' Lehey (grog_at_FreeBSD.org)
Date: 03/31/05

  • Next message: Scott Long: "Re: Problems with AMD64 and 8 GB RAM?" 
    Date: Thu, 31 Mar 2005 13:38:11 +0930
To: John Baldwin <jhb@FreeBSD.org>

    On Wednesday, 30 March 2005 at 23:01:03 -0500, John Baldwin wrote:
    >
    > On Mar 30, 2005, at 8:54 PM, Greg 'groggy' Lehey wrote:
    >>> lapic0: LINT1 trigger: edge
    >>> lapic0: LINT1 polarity: high
    >>> lapic1: Routing NMI -> LINT1
    >>> lapic1: LINT1 trigger: edge
    >>> lapic1: LINT1 polarity: high
    >>> -ioapic0 <Version 0.3> irqs 0-23 on motherboard
    >>> +ioapic0 <Version 0.0> irqs 0-23 on motherboard
    >>> cpu0 BSP:
    >>> ID: 0x00000000 VER: 0x00040010 LDR: 0x01000000 DFR: 0x0fffffff
    >>> lint0: 0x00010700 lint1: 0x00000400 TPR: 0x00000000 SVR: 0x000001ff
    >
    > This shows that in the - case the APIC is broken somehow (0.0 isn't a
    > valid I/O APIC version).

    You mean the + case, I suppose. Yes, that's what I suspected.

    > It would seem that the system has mapped RAM over top of the I/O
    > APIC perhaps?

    That's what I suspected too, but imp doesn't think so.

    > It would be interesting to see the contents of your MADT to see if
    > it's trying to use a 64-bit PA for your APIC.

    Any suggestions about how to do so?

    Greg 

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