Date: Sun, 6 Nov 2005 15:39:58 -0700 (MST) From: Vaibhave Agarwal <vaibhave@cs.utah.edu> To: John Baldwin <jhb@FreeBSD.org> Cc: freebsd-net@FreeBSD.org, freebsd-acpi@freebsd.org, current@FreeBSD.org, chris@gnome.co.uk Subject: Re: Freebsd 6.0 doesnt detect local APIC on a Pentium 3 machine Message-ID: <Pine.LNX.4.61.0511061525330.16649@trust.cs.utah.edu> In-Reply-To: <200511061012.57212.jhb@FreeBSD.org> References: <20051027233636.GA39380@dmw.hopto.org> <Pine.LNX.4.61.0510281621120.19263@trust.cs.utah.edu> <Pine.LNX.4.61.0511060450130.4600@trust.cs.utah.edu> <200511061012.57212.jhb@FreeBSD.org>
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On Sun, 6 Nov 2005, John Baldwin wrote:
> We don't detect the local APIC via MSR's or the APIC bit in cpu_features, but
> rely on a working MP Table or MADT table to setup both the local APIC(s) and
> I/O APIC(s). Does your machine have a valid MP Table or an APIC table in its
> acpidump? Many UP machine BIOSes don't include those tables.
>
I think you are right.
There is no valid APIC table in the acpidump.
The only place where APIC is mentioned in the acpidump(8) is in following:
Scope (\_SB)
{
Name (APIC, 0x00)
Method (_PIC, 1, NotSerialized)
{
Store (Arg0, APIC)
}
}
And I suppose APIC is disabled in the BIOS too.
Is there a way to enable APIC using software, without changing the BIOS,
since I dont have access to the BIOS, as it is a remote machine (with
root access) ?
Thanks
vaibhave
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