i386/98215: regression: FreeBSD can no longer boot Geode GX1 CPU

[Molle Bestefich]

>Number:         98215
>Category:       i386
>Synopsis:       regression: FreeBSD can no longer boot Geode GX1 CPU
>Confidential:   no
>Severity:       critical
>Priority:       medium
>Responsible:    freebsd-i386
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Wed May 31 14:00:32 GMT 2006
>Closed-Date:
>Last-Modified:
>Originator:     Molle Bestefich
>Release:        6.1
>Organization:
>Environment:
N/A
>Description:
Using FreeBSD 4.7 with the Geode patches from:
http://www.routerboard.com/geode.html

This is the successful bootup:
==============================================
FreeBSD 4.7-GEODE-RELEASE #0: Wed Oct 30 07:03:05 GMT 2002
Timecounter "i8254"  frequency 1193182 Hz
CPU: Pentium (300.01-MHz 586-class CPU)
  Origin = "Geode by NSC"  Id = 0x540
real memory  = 268435456 (262144K bytes)
avail memory = 256045056 (250044K bytes)
Preloaded elf kernel "kernel" at 0xc050f000.
md0: Malloc disk
Using $PIR table, 4 entries at 0xc00f4f50
npx0: <math processor> on motherboard
npx0: INT 16 interface
pcib0: <Host to PCI bridge> on motherboard
pci0: <PCI bus> on pcib0
pci0: <unknown card> (vendor=0x14e4, dev=0x5802) at 13.0 irq 10
fxp0: <Intel Embedded 10/100 Ethernet> port 0x8000-0x803f mem 0x80200000-0x8021ffff,0x80100000-0x80100fff irq 11 at device 14.0 on pci0
.. snip ...
==============================================

Using FreeBSD 6.1, either vanilla or with the Geode INT15 patch applied (no difference), this is the failed bootup:

==============================================
FreeBSD 6.1-RELEASE #0: Wed May 31 10:57:15 UTC 2006
Timecounter "i8254" frequency 1193182 Hz quality 0
CPU: Geode(TM) Integrated Processor by National Semi (300.01-MHz 586-class CPU)
  Origin = "Geode by NSC"  Id = 0x540  Stepping = 0
  Features=0x808131<FPU,TSC,MSR,CX8,CMOV,MMX>
real memory  = 268435456 (256 MB)
avail memory = 253087744 (241 MB)
wlan: mac acl policy registered
kbd1 at kbdmux0
ath_hal: 0.9.16.16 (AR5210, AR5211, AR5212, RF5111, RF5112, RF2413, RF5413)
cpu0 on motherboard
pcib0: <Host to PCI bridge> pcibus 0 on motherboard
pir0: <PCI Interrupt Routing Table: 4 Entries> on motherboard
pci0: <PCI bus> on pcib0

Fatal trap 12: page fault while in kernel mode
cpuid = 0; apic id = 00
fault virtual address   = 0xeb11f
fault code              = supervisor read, page not present
instruction pointer     = 0x20:0xc00eb631
stack pointer           = 0x28:0xc0c209e0
frame pointer           = 0x28:0xc0c209e0
code segment            = base 0x0, limit 0xfffff, type 0x1b
                        = DPL 0, pres 1, def32 1, gran 1
processor eflags        = interrupt enabled, resume, IOPL = 0
current process         = base 0x0, limit 0xfffff, type 0x1b
                        = 0 (swapper)

[thread pid 0 tid 0 ]
Stopped at      0xc00eb631:     cmpb    %cs:0x1(%esi),%bl

db> trace
Tracing pid 0 tid 0 td 0xc0a72320
kernbase(c00f4fa2,c00f4fa0,c090c15d,a0a,68) at 0xc00eb631
_end(cb9d08c4,52495024,600100,9000,21078) at 0xc0c20a38
==============================================

Hardware / firmware information:
==============================================
The CPU is a National Semiconductor Geode GX1.
The accompanying chipset is a National Semiconductor Geode CS5530A.
The accompanying BIOS is an Insyde XpressROM a059.
The "unknown card" found by FreeBSD is a BroadCom 5802 cryptoprocessor.
==============================================


>How-To-Repeat:
Install FreeBSD 6.1 onto appropriate hardware.

>Fix:
This is the first time I've ever installed/used BSD, so I don't have a clue.  I'd be happy to run DDB commands, patch and install kernels etc. if you can give me a hint what to look for.  Any useful places I can insert printf's, for example?

>Release-Note:
>Audit-Trail:
>Unformatted: