From owner-freebsd-current  Wed May 24  7:48:23 2000
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To: Manfred Antar <mantar@pacbell.net>
Cc: Tor.Egge@fast.no, current@FreeBSD.ORG
Subject: Re: mpboot.s patch 
In-Reply-To: Message from Manfred Antar <mantar@pacbell.net> 
   of "Tue, 23 May 2000 21:40:39 PDT." <4.3.2.6.2.20000523212316.00b13280@pozo.com> 
Date: Wed, 24 May 2000 07:48:14 -0700
From: Peter Wemm <peter@netplex.com.au>
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Manfred Antar wrote:
> At 04:33 AM 5/24/2000 +0200, Tor.Egge@fast.no wrote:
> >> >> With a current kernel I get this when booting:
> >> >> 
> >> >> Programming 24 pins in IOAPIC #0
> >> >> AP #1  (PHY# 12) failed!
> >> >> panic y/n [y] panic: bye-bye
> >> >> mp_lock = 00000001; cpuid = 0; lapic.id = 00000000
> >> >> Uptime: 0s
> >
> >[...]
> >
> >> I think this has something to do 
> >> with the new binutils as a kernel built on the 14th and restored via tape 
    works fine but if i
> >> check out the sys tree from the 14th and build a kernel it panics at the A
    PIC probe.
> >
> >Try the enclosed patch.
> >
> >- Tor Egge
> Tor 
> Works great 
> The patch didn't apply I think there is a "data32"
> in the patch that isn't in the mpboot.s file
> but when I applied the patch manually an added the data32
> the kernel built fine and boots both cpu's without a problem.
> 
> although mptable still causes a panic :
> 
> panic: pmap_enter: attempted pmap_enter on 4MB page
> mp_lock = 00000002; cpuid = 0; lapic.id = 00000000
> boot() called on cpu#0
> Thanks
> Manfred

I believe I have fixed the 4MB pmap_enter related bugs.  Please re-cvsup
and try again.  You are looking for  i386/i386/mem.c:
 revision 1.84
 date: 2000/05/24 14:22:22;  author: peter;  state: Exp;  lines: +2 -1
 pmap_enter() masked off the page offset bits, pmap_kenter() did not.
 This (I believe) is the cause of the XFree86 startup and mptable(8)
 panics when programs were reading from /dev/mem at non-page-aligned
 offsets.  The offsets were being converted into random page flags in the
 page tables. :-(   (including PG_PS = 4MB page size)

Cheers,
-Peter




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