[Bug 232288] i386 boot time panic of head on amd64 machine (PCI BIOS search, 0x49435024)

[bugzilla-noreply at freebsd.org]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=232288

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |bz at FreeBSD.org,
                   |                            |jhb at FreeBSD.org,
                   |                            |kib at 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 at 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 header
at %p\n", sdh);
    106                 printf("bios32: Entry = 0x%x (%x)  Rev = %d  Len =
%d\n",
    107                        sdh->entry, bios32_SDCI, sdh->revision,
sdh->len);
    108             }
    109
    110             /* Allow user override of PCI BIOS search */
    111             if (((p = kern_getenv("machdep.bios.pci")) == NULL) ||
strcmp(p, "disable")) {
    112
    113                 /* See if there's a PCI BIOS entrypoint here */
    114                 PCIbios.ident.id = 0x49435024;  /* PCI systems should
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 != NULL)
    119                     freeenv(p);
    120         } else {
    121             printf("bios32: Bad BIOS32 Service Directory\n");
    122         }


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

(some information from kenv on the system):

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

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