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Date:      Wed, 17 Oct 2018 09:08:13 +0000
From:      bugzilla-noreply@freebsd.org
To:        bugs@FreeBSD.org
Subject:   [Bug 232288] i386 boot time panic of head on amd64 machine (PCI BIOS search, 0x49435024)
Message-ID:  <bug-232288-227-jxDYc3OTeU@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-232288-227@https.bugs.freebsd.org/bugzilla/>
References:  <bug-232288-227@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D232288

Bjoern A. Zeeb <bz@FreeBSD.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |bz@FreeBSD.org,
                   |                            |jhb@FreeBSD.org,
                   |                            |kib@FreeBSD.org
            Summary|i386 boot time panic of     |i386 boot time panic of
                   |head on amd64 machine       |head on amd64 machine (PCI
                   |                            |BIOS search, 0x49435024)
             Status|New                         |Open

--- Comment #1 from Bjoern A. Zeeb <bz@FreeBSD.org> ---
Is there anything we can (automagically) do to prevent this panic?


This seems to come from:

sys/i386/i386/bios.c:bios32_init()

    104             if (bootverbose) {
    105                 printf("bios32: Found BIOS32 Service Directory head=
er
at %p\n", sdh);
    106                 printf("bios32: Entry =3D 0x%x (%x)  Rev =3D %d  Le=
n =3D
%d\n",
    107                        sdh->entry, bios32_SDCI, sdh->revision,
sdh->len);
    108             }
    109
    110             /* Allow user override of PCI BIOS search */
    111             if (((p =3D kern_getenv("machdep.bios.pci")) =3D=3D NUL=
L) ||
strcmp(p, "disable")) {
    112
    113                 /* See if there's a PCI BIOS entrypoint here */
    114                 PCIbios.ident.id =3D 0x49435024;  /* PCI systems sh=
ould
have this */

^^^^^^^

    115                 if (!bios32_SDlookup(&PCIbios) && bootverbose)
    116                     printf("pcibios: PCI BIOS entry at 0x%x+0x%x\n",
PCIbios.base, PCIbios.entry);
    117             }
    118             if (p !=3D NULL)
    119                     freeenv(p);
    120         } else {
    121             printf("bios32: Bad BIOS32 Service Directory\n");
    122         }


set machdep.bios.pci=3Ddisable in loader allows rabbit4 to boot.

(some information from kenv on the system):

smbios.bios.reldate=3D"07/05/2013"
smbios.bios.vendor=3D"American Megatrends Inc."
smbios.bios.version=3D"3.00"
smbios.chassis.maker=3D"Supermicro"
smbios.memory.enabled=3D"33562624"
smbios.planar.product=3D"X9SRW-F"
smbios.planar.serial=3D"ZM148S031878"
smbios.planar.version=3D"1.02"
smbios.socket.enabled=3D"1"
smbios.socket.populated=3D"1"
smbios.system.maker=3D"iXsystems"
smbios.system.product=3D"1204S"
smbios.system.serial=3D"A1-35883"
smbios.system.uuid=3D"00000000-0000-0000-0000-0cc47a407c78"
smbios.version=3D"2.7"

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