Date: Sun, 25 Aug 1996 16:45:55 +0200 (SAT) From: rv@groa.uct.ac.za (Russell Vincent) To: freebsd-smp@FreeBSD.ORG Subject: Re: SMP on Intel MG15 Message-ID: <m0uugRo-0004wbC@groa.uct.ac.za> In-Reply-To: <m0urkId-0004wYC@groa.uct.ac.za> from "rv@groa.uct.ac.za" at Aug 17, 96 02:16:18 pm
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I wrote:
> A status report:
> 2) The machine locks up shortly after the SMP kernel load:
>
> FreeBSD/SMP: Multiprocessor motherboard
> Boot cpunumber=0x0
> [ machines freezes ]
This happens in the following segment of code in
/usr/src/sys/i386/i386/mpcore.s :
/* Step 1 - Do a INIT/Reset seqeuence */
movl APIC_ICR_HI(%esi),%eax
andl $0xf0ffffff,%eax /* mask out ID bits */
orl $CPUNBR,%eax
movl %eax,APIC_ICR_HI(%esi)
movl APIC_ICR_LOW(%esi),%eax
andl $0xfff00000,%eax
orl $0x0000c500,%eax /* do a INIT IPI - ASSERT/RESET */
movl %eax,APIC_ICR_LOW(%esi)
3: movl APIC_ICR_LOW(%esi),%eax /* wait for pending status end */
andl $0x00001000,%eax
jnz 3b
The boot process doesn't seem to get out of this last loop.
Unfortunately, I don't have the knowledge or the specs handy to
be able to go further, but thought that might help anyone who can.
-Russell
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