Bug 61973

In booting an AlphaServer 2100A RM, the computer does an unexpected machine check while probing the PCI/EISA bus:

The machine check occurs in any 5.x smp or uniprocessor kernel, it also occurs in any smp 4.x kernel. but boots safelt into sysinstall in 4.x uniprocessor kernels.

00>>>boot dka500
(boot dka500.5.0.2001.0)
block 0 of dka500.5.0.2001.0 is a valid boot block
reading 393 blocks from dka500.5.0.2001.0
bootstrap code read in
base = 200000, image_start = 0, image_bytes = 31200
initializing HWRPB at 2000
initializing page table at 27ff0000
initializing machine state
setting affinity to the primary CPU
jumping to bootstrap code
Console: SRM firmware console
VMS PAL rev: 0x4000700010538
OSF PAL rev: 0x4000c0002012d
Switch to OSF PAL code succeeded.

FreeBSD/alpha SRM CD9660 boot, Revision 1.2
(root@mithlond.btc.adaptec.com, Sat Jan 10 12:52:28 GMT 2004)
Memory: 655360 k
Loading /boot/defaults/loader.conf
/boot/kernel/kernel data=0x508f30+0x418f0 syms=[0x8+0x671d0+0x8+0x5115f]
|
Hit [Enter] to boot immediately, or any other key for command prompt.
Booting [/boot/kernel/kernel] in 9 seconds...

Type '?' for a list of commands, 'help' for more detailed help.
OK boot -v
Entering /boot/kernel/kernel at 0xfffffc0000342f20...
Copyright (c) 1992-2004 The FreeBSD Project.
Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994
        The Regents of the University of California. All rights reserved.
FreeBSD 5.2-RELEASE #0: Sun Jan 11 01:06:36 GMT 2004
    root@mithlond.btc.adaptec.com:/usr/obj/usr/src/sys/GENERIC
Preloaded elf kernel "/boot/kernel/kernel" at 0xfffffc0000d3e000.
Preloaded mfs_root "/boot/mfsroot" at 0xfffffc0000d3e0e0.
DEC AlphaServer 2100A
AlphaServer 2100A 4/275, 274MHz
8192 byte page size, 4 processors.
CPU: EV45 (21064A) major=6 minor=2
OSF PAL rev: 0x4000c0002012d
real memory  = 668917760 (637 MB)
Physical memory chunk(s):
0x00d60000 - 0x2767bfff, 647086080 bytes (78990 pages)
avail memory = 637779968 (608 MB)
smp_start_secondary: starting cpu 1
smp_start_secondary: cpu 1 started
smp_start_secondary: starting cpu 2
smp_start_secondary: cpu 2 started
smp_start_secondary: starting cpu 3
smp_start_secondary: cpu 3 started
FreeBSD/SMP: Multiprocessor System Detected: 4 CPUs
null: <null device, zero device>
random: <entropy source>
mem: <memory & I/O>
t20: using interrupt type 1 on pci bus 0
t20: <T2 Core Logic chipset>
pcib0: <T2 PCI host bus adapter> on t20
pci0: <PCI bus> on pcib0
pci0: physical bus=0
found-> vendor=0x8086, dev=0x0482, revid=0x15
        bus=0, slot=2, func=0
        class=00-00-00, hdrtype=0x00, mfdev=0
        cmdreg=0x0007, statreg=0x0200, cachelnsz=0 (dwords)
        lattimer=0xf8 (7440 ns), mingnt=0x00 (0 ns), maxlat=0x00 (0 ns)
found-> vendor=0x1011, dev=0x0001, revid=0x02
        bus=0, slot=3, func=0
        class=06-04-00, hdrtype=0x01, mfdev=0
        cmdreg=0x0007, statreg=0x0a80, cachelnsz=8 (dwords)
        lattimer=0xf8 (7440 ns), mingnt=0x27 (9750 ns), maxlat=0x00 (0 ns)
eisab0: <PCI-EISA bridge> at device 2.0 on pci0

unexpected machine check:

    mces    = 0x1
    vector  = 0x670
    param   = 0xfffffc0000006000
    pc      = 0xfffffc00003b48d4
    ra      = 0xfffffc00003b4908
    curproc = 0xfffffc0000810ee0
        pid = 0, comm = swapper

panic: machine check
cpuid = 0;
Uptime: 1s
Automatic reboot in 15 seconds - press a key on the console to abort

How-To-Repeat: Boot any FreeBSD 5.xx smp or uniprocessor kernel in a 2100A
Bott any FreeBSd 4.x smp kernel