[LinuxBIOS] Kernel crash output (was: What's stored in the CMOS by LB?)
Eric Poulsen
eric at zyxod.com
Wed Apr 26 18:02:12 CEST 2006
My kernel crash issue is attached below. This one isn't an Exception 6
(that I can tell), but it's one I've seen before. This happened twice
in a row, after the machine had been off for a while. As usual,
flipping to the factory BIOS, seeing the "corrupt CMOS" message, and
re-writing the CMOS fixed the issue. I immediately flipped back to LB,
and it worked as expected.
I looked at the CMOS code in src/pc80/mc146818rtc.c. The code that
prints "Invalid CMOS LB checksum" is found immediately after a call to
CMOS_WRITE, then it sets the checksum. If you remove the comments in
the source, the following two code snippets are contiguous, but I've
inserted comments.
The following works ok:
===
checksum_invalid =
!rtc_checksum_valid(PC_CKS_RANGE_START,PC_CKS_RANGE_END,PC_CKS_LOC);
if (invalid || cmos_invalid || checksum_invalid) {
printk_warning("RTC:%s%s%s zeroing cmos\n",
invalid?" Clear requested":"",
cmos_invalid?" Power Problem":"",
checksum_invalid?" Checksum invalid":"");
===
The following fails. You can see at the end of this block, there is a
routine to set the checksum. Here's my guess: the CMOS_WRITE commands
below do not work correctly, causing the checksum error. A valid
checksum is computed and written, which prevents the error from
occurring above on the next reboot. OR, 'Invalid CMOS LB checksum' is
perfectly normal because the checksum should be invalid after a write.
In the case of the latter, the checksumming that occurs below is
pointless, since it's about to be written anyway.
===
/* Setup the real time clock */
CMOS_WRITE(RTC_CONTROL_DEFAULT, RTC_CONTROL);
/* Setup the frequency it operates at */
CMOS_WRITE(RTC_FREQ_SELECT_DEFAULT, RTC_FREQ_SELECT);
/* See if there is a LB CMOS checksum error */
checksum_invalid =
!rtc_checksum_valid(LB_CKS_RANGE_START,LB_CKS_RANGE_END,LB_CKS_LOC);
if(checksum_invalid)
printk_debug("Invalid CMOS LB checksum\n");
/* Make certain we have a valid checksum */
rtc_set_checksum(PC_CKS_RANGE_START,PC_CKS_RANGE_END,PC_CKS_LOC);
===
-- Eric
Ronald G Minnich wrote:
> Eric Poulsen wrote:
>
>>
>> 1) Does LB store anything in the CMOS?
>
> it can. It does store a few abouts about the type of boot that
> occurred (fallback or normal).
>
>
>> 2) If yes, is there anything in there that could become corrupted and
>> cause "weird issues" as described above?
>
> What's exception 6? I don't recall.
>
> sometimes clocking info is stored in CMOS. There could be a collision
> here.
>
> If you can tell more it would be good to know.
>
> ron
>
0
LinuxBIOS-1.1.8.0Fallback Tue Apr 25 20:17:47 PDT 2006 starting...
Enabling mainboard devices
Enabling shadow ram
vt8623 init starting
Detecting Memory
Number of Banks 04
Number of Rows 0d
Priamry DRAM width08
No Columns 0a
MA type e0
Bank 0 (*16 Mb) 10
No Physical Banks 01
Total Memory (*16 Mb) 10
CAS Supported 2 2.5 3
Cycle time at CL X (nS)50
Cycle time at CL X-0.5 (nS)60
Cycle time at CL X-1 (nS)75
Starting at CAS 3
We can do CAS 2.5
We can do CAS 2
tRP 48
tRCD 48
tRAS 28
Low Bond 00 High Bondc7 Setting DQS delay84vt8623 done
00:06 11 23 31 06 00 30 22 00 00 00 06 00 00 00 00
10:08 00 00 d0 00 00 00 00 00 00 00 00 00 00 00 00
20:00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
30:00 00 00 00 a0 00 00 00 00 00 00 00 00 00 00 00
40:00 18 88 80 82 44 00 00 18 99 88 80 82 44 00 00
50:c8 de cf 88 e0 07 00 00 e0 00 10 10 10 10 00 00
60:02 ff 00 30 d6 32 01 20 42 2d 43 58 00 44 00 00
70:82 48 00 01 01 08 50 00 01 00 00 00 00 00 00 02
80:0f 65 00 00 80 00 00 00 02 00 00 00 00 00 00 00
90:00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
a0:02 c0 20 00 07 02 00 1f 04 00 00 00 2f 02 04 00
b0:00 00 00 00 40 00 00 00 a8 00 00 00 00 00 00 00
c0:01 00 02 00 00 00 00 00 00 00 00 00 00 00 00 00
d0:00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
e0:00 dd 00 00 00 00 01 00 40 00 00 00 00 00 00 00
f0:00 00 00 00 00 00 12 13 00 00 00 00 00 00 00 00
AGP
Doing MTRR init.
Copying LinuxBIOS to ram.
Jumping to LinuxBIOS.
LinuxBIOS-1.1.8.0Fallback Tue Apr 25 20:17:47 PDT 2006 booting...
clocks_per_usec: 838
Enumerating buses...
Finding PCI configuration type.
PCI: Using configuration type 1
PCI_DOMAIN: 0000 enabled
APIC_CLUSTER: 0 enabled
PCI: pci_scan_bus for bus 0
PCI: 00:00.0 [1106/3123] enabled
PCI: 00:01.0 [1106/b091] enabled
Disabling static device: PCI: 00:0a.0
Disabling static device: PCI: 00:0a.1
In vt8235_enable 1106 3038.
PCI: 00:10.0 [1106/3038] enabled
In vt8235_enable 1106 3038.
PCI: 00:10.1 [1106/3038] enabled
In vt8235_enable 1106 3038.
PCI: 00:10.2 [1106/3038] enabled
In vt8235_enable 1106 3104.
PCI: 00:10.3 [1106/3104] enabled
In vt8235_enable 1106 3177.
Initialising Devices
PCI: 00:11.0 [1106/3177] enabled
In vt8235_enable 1106 0571.
PCI: 00:11.1 [1106/0571] enabled
In vt8235_enable 1106 3059.
PCI: 00:11.5 [1106/3059] enabled
In vt8235_enable ffff ffff.
In vt8235_enable 1106 3065.
PCI: 00:12.0 [1106/3065] enabled
PCI: pci_scan_bus for bus 1
PCI: 01:00.0 [1106/3122] enabled
PCI: pci_scan_bus returning with max=01
vt1211 enabling PNP devices.
PNP: 002e.0 enabled
vt1211 enabling PNP devices.
PNP: 002e.1 enabled
vt1211 enabling PNP devices.
PNP: 002e.2 enabled
vt1211 enabling PNP devices.
PNP: 002e.3 enabled
vt1211 enabling PNP devices.
PNP: 002e.b enabled
PCI: pci_scan_bus returning with max=01
done
Allocating resources...
Reading resources...
Done reading resources.
Setting resources...
I would set ram size to 0x40000 Kbytes
PCI: 00:10.0 20 <- [0x0000001800 - 0x000000181f] io
PCI: 00:10.1 20 <- [0x0000001820 - 0x000000183f] io
PCI: 00:10.2 20 <- [0x0000001840 - 0x000000185f] io
PCI: 00:10.3 10 <- [0x00febff000 - 0x00febff0ff] mem
PNP: 002e.0 60 <- [0x00000003f0 - 0x00000003f7] io
PNP: 002e.0 70 <- [0x0000000006 - 0x0000000006] irq
PNP: 002e.0 74 <- [0x0000000002 - 0x0000000002] drq
PNP: 002e.1 60 <- [0x0000000378 - 0x000000037f] io
PNP: 002e.1 70 <- [0x0000000007 - 0x0000000007] irq
PNP: 002e.1 74 <- [0x0000000003 - 0x0000000003] drq
PNP: 002e.2 60 <- [0x00000003f8 - 0x00000003ff] io
PNP: 002e.2 70 <- [0x0000000004 - 0x0000000004] irq
PNP: 002e.3 60 <- [0x00000002f8 - 0x00000002ff] io
PNP: 002e.3 70 <- [0x0000000003 - 0x0000000003] irq
PNP: 002e.b 60 <- [0x000000ec00 - 0x000000ecff] io
PCI: 00:11.1 20 <- [0x0000001860 - 0x000000186f] io
PCI: 00:11.5 10 <- [0x0000001000 - 0x00000010ff] io
PCI: 00:12.0 10 <- [0x0000001400 - 0x00000014ff] io
PCI: 00:12.0 14 <- [0x00fec00000 - 0x00fec000ff] mem
Done setting resources.
Done allocating resources.
Enabling resources...
PCI: 00:00.0 cmd <- 146
PCI: 00:01.0 bridge ctrl <- 000f
PCI: 00:01.0 cmd <- 147
PCI: 01:00.0 cmd <- 140
PCI: 00:10.0 subsystem <- 00/00
PCI: 00:10.0 cmd <- 141
PCI: 00:10.1 subsystem <- 00/00
PCI: 00:10.1 cmd <- 141
PCI: 00:10.2 subsystem <- 00/00
PCI: 00:10.2 cmd <- 141
PCI: 00:10.3 subsystem <- 00/00
PCI: 00:10.3 cmd <- 142
PCI: 00:11.0 cmd <- 147
PNP: 002e.0 - enabling
PNP: 002e.1 - enabling
PNP: 002e.2 - enabling
PNP: 002e.3 - enabling
PNP: 002e.b - enabling
PCI: 00:11.1 cmd <- 147
PCI: 00:11.5 subsystem <- 00/00
PCI: 00:11.5 cmd <- 141
PCI: 00:12.0 cmd <- 1c3
done.
Initializing devices...
Root Device init
PCI: 00:10.0 init
PCI: 00:10.1 init
PCI: 00:10.2 init
PCI: 00:10.3 init
PCI: 00:11.0 init
vt8235 init
RTC Init
Invalid CMOS LB checksum
pci_routing_fixup: dev is 00010fa0
setting firewire
setting usb
Assigning IRQ 5 to 0:10.0
Readback = 5
pci_level_irq: lower order bits are wrong: want 0x0, got 0x20
Assigning IRQ 9 to 0:10.1
Readback = 9
pci_level_irq: lower order bits are wrong: want 0x0, got 0x20
Assigning IRQ 9 to 0:10.2
Readback = 9
pci_level_irq: lower order bits are wrong: want 0x0, got 0x20
Assigning IRQ 5 to 0:10.3
Readback = 5
pci_level_irq: lower order bits are wrong: want 0x0, got 0x20
setting vt8235
Assigning IRQ 5 to 0:11.1
Readback = 5
pci_level_irq: lower order bits are wrong: want 0x0, got 0x20
Assigning IRQ 9 to 0:11.5
Readback = 9
pci_level_irq: lower order bits are wrong: want 0x0, got 0x20
setting ethernet
Assigning IRQ 5 to 0:12.0
Readback = 5
pci_level_irq: lower order bits are wrong: want 0x0, got 0x20
setting vga
Assigning IRQ 5 to 1:0.0
Readback = 5
pci_level_irq: lower order bits are wrong: want 0x0, got 0x20
setting pci slot
setting cardbus slot
setting riser slot
PNP: 002e.0 init
PNP: 002e.1 init
PNP: 002e.2 init
PNP: 002e.3 init
PNP: 002e.b init
PCI: 00:11.1 init
Enabling VIA IDE.
ide_init: enabling compatibility IDE addresses
enables in reg 0x42 0x0
enables in reg 0x42 read back as 0x0
enables in reg 0x40 0x13
enables in reg 0x40 read back as 0x13
enables in reg 0x9 0x8a
enables in reg 0x9 read back as 0x8a
command in reg 0x4 0x7
command in reg 0x4 reads back as 0x7
PCI: 00:11.5 init
PCI: 00:12.0 init
Configuring VIA Rhine LAN
APIC_CLUSTER: 0 init
Initializing CPU #0
CPU: vendor Centaur device 673
Enabling cache
Setting fixed MTRRs(0-88) type: UC
Setting fixed MTRRs(0-16) Type: WB
Setting fixed MTRRs(24-88) Type: WB
DONE fixed MTRRs
Setting variable MTRR 0, base: 0MB, range: 128MB, type WB
Setting variable MTRR 1, base: 128MB, range: 64MB, type WB
Setting variable MTRR 2, base: 192MB, range: 32MB, type WB
DONE variable MTRRs
Clear out the extra MTRR's
MTRR check
Fixed MTRRs : Enabled
Variable MTRRs: Enabled
Disabling local apic...done.
CPU #0 Initialized
PCI: 00:00.0 init
VT8623 random fixup ...
Frame buffer at d0000000
PCI: 00:01.0 init
VT8623 AGP random fixup ...
PCI: 01:00.0 init
VGA random fixup ...
INSTALL REAL-MODE IDT
DO THE VGA BIOS
found VGA: vid=1106, did=3122
rom base, size: fffc0000
write_protect_vgabios
bus/devfn = 0x100
biosint: INT# 0x15
biosint: eax 0x5f00 ebx 0x18538 ecx 0x17fa0 edx 0xa
biosint: ebp 0x17f70 esp 0xff2 edi 0xecf0 esi 0x18538
biosint: ip 0x637f cs 0xc000 flags 0x46
biosint: INT# 0x1a
biosint: eax 0xb108 ebx 0x10000 ecx 0x10000 edx 0x3d5
biosint: ebp 0x17f70 esp 0xfcc edi 0xf6 esi 0x155eb
biosint: ip 0x40da cs 0xc000 flags 0x46
0xb108: bus 0 devfn 0x0 reg 0xf6 val 0x12
biosint: INT# 0x15
biosint: eax 0x5f0f ebx 0x18538 ecx 0x7fa0 edx 0x3d5
biosint: ebp 0x17f70 esp 0xfee edi 0x44 esi 0x18538
biosint: ip 0x647e cs 0xc000 flags 0x7
biosint: INT# 0x15
biosint: eax 0x5f02 ebx 0x18538 ecx 0x7f01 edx 0x3d5
biosint: ebp 0x17f70 esp 0xfdc edi 0x44 esi 0x18538
biosint: ip 0x63cb cs 0xc000 flags 0x46
biosint: INT# 0x15
biosint: eax 0x5f18 ebx 0x18501 ecx 0x7fa0 edx 0x3d5
biosint: ebp 0x17f70 esp 0xfde edi 0x44 esi 0x18538
biosint: ip 0x6496 cs 0xc000 flags 0x46
biosint: INT# 0x15
biosint: eax 0x5f06 ebx 0x18001 ecx 0x1 edx 0x0
biosint: ebp 0x10fd6 esp 0xfa4 edi 0x0 esi 0x14672
biosint: ip 0x63dc cs 0xc000 flags 0x246
biosint: INT# 0x15
biosint: eax 0x5f08 ebx 0x10d01 ecx 0x8301 edx 0xd4
biosint: ebp 0x10fd6 esp 0xfa4 edi 0x0 esi 0x10d0e
biosint: ip 0x63e8 cs 0xc000 flags 0x246
Devices initialized
Copying IRQ routing tables to 0xf0000...done.
Verifing copy of IRQ routing tables at 0xf0000...done
Checking IRQ routing table consistency...
check_pirq_routing_table() - irq_routing_table located at: 0x000f0000
done.
ACPI: Writing ACPI tables at f0400...
ACPI: * FACS
ACPI: * DSDT @ 000f049e Length 3f0
ACPI: * FADT
ACPI: added table 1/5 Length now 40
ACPI: done.
Moving GDT to 0x500...ok
Wrote linuxbios table at: 00000530 - 00000b80 checksum 68b7
Welcome to elfboot, the open sourced starter.
January 2002, Eric Biederman.
Version 1.3
33:stream_init() - rom_stream: 0xfffd0000 - 0xfffeffff
Found ELF candiate at offset 0
New segment addr 0x100000 size 0x23760 offset 0xc0 filesize 0x96e8
(cleaned up) New segment addr 0x100000 size 0x23760 offset 0xc0 filesize
0x96e8
New segment addr 0x123760 size 0x48 offset 0x97c0 filesize 0x48
(cleaned up) New segment addr 0x123760 size 0x48 offset 0x97c0 filesize 0x48
Dropping non PT_LOAD segment
Dropping non PT_LOAD segment
Loading Segment: addr: 0x0000000000100000 memsz: 0x0000000000023760
filesz: 0x00000000000096e8
Clearing Segment: addr: 0x00000000001096e8 memsz: 0x000000000001a078
Loading Segment: addr: 0x0000000000123760 memsz: 0x0000000000000048
filesz: 0x0000000000000048
Jumping to boot code at 0x107860
FILO version 0.4.2 (root at embedded) Tue Apr 25 20:15:07 PDT 2006
boot: hda1:/vmlinuz root=/dev/hda1 console=tty0 console=ttyS0,115200
hda: LBA 80GB: WDC WD800JB-00FMA0
Mounted ext2fs
Found Linux version 2.6.16.5 (root at Proteus) #3 Sun Apr 16 21:06:34 PDT
2006 bzImage.
Loading kernel... ok
Jumping to entry point...
[17179569.184000] Linux version 2.6.16.5 (root at Proteus) (gcc version
4.0.2 20050808 (prerelease) (Ubuntu 4.0.1-4ubuntu9)) #3 Sun Apr 16
21:06:34 PDT 2006
[17179569.184000] BIOS-provided physical RAM map:
[17179569.184000] BIOS-e820: 0000000000000be0 - 00000000000a0000 (usable)
[17179569.184000] BIOS-e820: 0000000000100000 - 000000000e000000 (usable)
[17179569.184000] 0MB HIGHMEM available.
[17179569.184000] 224MB LOWMEM available.
[17179569.184000] DMI not present or invalid.
[17179569.184000] ACPI: PM-Timer IO Port: 0x408
[17179569.184000] Allocating PCI resources starting at 10000000 (gap:
0e000000:f2000000)
[17179569.184000] Built 1 zonelists
[17179569.184000] Kernel command line: root=/dev/hda1 console=tty0
console=ttyS0,115200
[17179569.184000] No local APIC present or hardware disabled
[17179569.184000] Initializing CPU#0
[17179569.184000] PID hash table entries: 1024 (order: 10, 16384 bytes)
[17179569.184000] Detected 533.193 MHz processor.
[17179569.184000] Using pmtmr for high-res timesource
[17179569.184000] Console: colour VGA+ 80x25
[17179571.984000] Dentry cache hash table entries: 32768 (order: 5,
131072 bytes)
[17179571.992000] Inode-cache hash table entries: 16384 (order: 4, 65536
bytes)
[17179572.052000] Memory: 223968k/229376k available (1628k kernel code,
4992k reserved, 604k data, 232k init, 0k highmem)
[17179572.064000] Checking if this processor honours the WP bit even in
supervisor mode... Ok.
[17179572.152000] Calibrating delay using timer specific routine..
1068.40 BogoMIPS (lpj=2136811)
[17179572.160000] Security Framework v1.0.0 initialized
[17179572.164000] SELinux: Disabled at boot.
[17179572.168000] Mount-cache hash table entries: 512
[17179572.172000] CPU: L1 I Cache: 64K (32 bytes/line), D cache 64K (32
bytes/line)
[17179572.180000] CPU: L2 Cache: 64K (32 bytes/line)
[17179572.184000] CPU: Centaur VIA Samuel 2 stepping 03
[17179572.192000] Checking 'hlt' instruction... OK.
[17179572.268000] ACPI: setting ELCR to 0020 (from 0220)
[17179572.276000] NET: Registered protocol family 16
[17179572.280000] EISA bus registered
[17179572.284000] ACPI: bus type pci registered
[17179572.340000] Unable to handle kernel paging request at virtual
address 6de8d753
[17179572.340000] printing eip:
[17179572.340000] c00fab46
[17179572.340000] *pde = 00000000
[17179572.340000] Oops: 0002 [#1]
[17179572.340000] Modules linked in:
[17179572.340000] CPU: 0
[17179572.340000] EIP: 0060:[<c00fab46>] Not tainted VLI
[17179572.340000] EFLAGS: 00010087 (2.6.16.5 #3)
[17179572.340000] EIP is at 0xc00fab46
[17179572.340000] eax: 00008701 ebx: 000f0000 ecx: 0000d5b4 edx:
00000000
[17179572.340000] esi: 00000206 edi: c02f9874 ebp: 000fa960 esp:
c121ffb6
[17179572.340000] ds: 007b es: 0000 ss: 0068
[17179572.340000] Process swapper (pid: 1, threadinfo=c121e000
task=c1217a70)
[17179572.340000] Stack: <0>c00fa99d 00000000 a2350006 0060c034 20440000
83c8c02b 0000c036 00000000
[17179572.340000] 00000000 03070000 0290c010 0000c010 10050000
0000c010 00000000 00000000
[17179572.340000] 00000000 00000000
[17179572.340000] Call Trace:
[17179572.340000] Code: 00 f8 c3 87 db 52 50 e8 95 01 00 00 72 12 66 51
66 8b df 8a eb e8 23 02 00 00 66 59 8a c8 b4 00 8a d4 58 8a e2 5a 0a e4
74 01 f5 <d3> 90 52 50 e8 6d 01 10 00 72 1a 66 f7 c7 01 00 74 04 b4 87 eb
[17179572.340000] <0>Kernel panic - not syncing: Attempted to kill init!
[17179572.340000] 0
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