From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from p15137414.pureserver.info (matrixvision.de [217.160.213.229]) by ozlabs.org (Postfix) with ESMTP id 5115DDDDEF for ; Tue, 8 Apr 2008 18:51:23 +1000 (EST) Message-ID: <47FB3206.7080406@matrix-vision.de> Date: Tue, 08 Apr 2008 10:51:18 +0200 From: Andre Schwarz MIME-Version: 1.0 To: Scott Wood Subject: Re: MPC8343 - "unable to handle paging request @ 0" References: <47F73625.9040903@matrix-vision.de> <20080407161036.GA2688@loki.buserror.net> In-Reply-To: <20080407161036.GA2688@loki.buserror.net> Content-Type: multipart/alternative; boundary="------------020302030509020500090003" Cc: linuxppc-dev@ozlabs.org List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , This is a multi-part message in MIME format. --------------020302030509020500090003 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: quoted-printable Scott Wood schrieb: > On Sat, Apr 05, 2008 at 10:19:49AM +0200, Andr=E9 Schwarz wrote: > =20 >> Kernel starts and crashes with "unable to handle kernel paging request= @ =20 >> 00000000". >> >> After turning debug on in some files I can see that the initrd memory = =20 >> gets reserved and the dtb is parsed correctly. >> PCI memory/io spaces are set up fine. >> >> At first I thought this is a problem with the device tree since the ca= ll =20 >> trace always points to "of_"-functions and "strcmp". >> =20 > > Could you provide this call trace? > > -Scott > =20 Scott, thanks for your reply. please find below the output after the bootm command in u-boot. My System.map : ... c00126b8 T strcpy c00126d4 T strncpy c0012714 T strcat c0012740 T strcmp c0012764 T strlen c001277c T memcmp ... c0140bc4 T of_find_property c0140c74 T of_get_property c0140ca8 T of_device_is_compatible c0140d48 T of_match_node c0140e68 T of_find_matching_node c0140f20 T of_n_size_cells c0140f9c T of_n_addr_cells Log: # Booting kernel from Legacy Image at ff810000 ... Image Name: 2.6.25 mvBL-M7 MPC8343 #1 Image Type: PowerPC Linux Kernel Image (uncompressed) Data Size: 2084636 Bytes =3D 2 MB Load Address: 00000000 Entry Point: 00000000 Verifying Checksum ... OK Loading Kernel Image ... OK OK ## Flattened Device Tree blob at 00000000 Booting using the fdt blob at 0x600000 ## Loading init Ramdisk from Legacy Image at 01000000 ... Image Name: mvBC-1G uInitrd #1.1.03 Image Type: PowerPC Linux RAMDisk Image (uncompressed) Data Size: 2654208 Bytes =3D 2.5 MB Load Address: 00000000 Entry Point: 00000000 Verifying Checksum ... OK Loading Ramdisk to 1fcb7000, end 1ff3f000 ... OK -> early_init_devtree(c0600000) search "chosen", depth: 0, uname: search "chosen", depth: 1, uname: chosen Looking for initrd properties... <3>initrd_start=3D0xdfcb7000 =20 initrd_end=3D0xdff3f000 Command line is: root=3D/dev/ram ro rootfstype=3Dsquashfs dt_root_size_cells =3D 1 dt_root_addr_cells =3D 1 memory scan node memory, reg size 8, data: 0 20000000 2 1, - 0 , 20000000 reserving: 1fcb7000 -> 288001 Phys. mem: 20000000 -> move_device_tree <- move_device_tree Scanning CPUs ... boot cpu: logical 0 physical 0 <- early_init_devtree() Using mvBlueLYNX-M7 machine description Linux version 2.6.25-rc8-01197-g1de15bb-dirty (root@nova) (gcc version=20 4.0.0 (DENX ELDK 4.1 4.0.0)) #1 PREEMPT Tue Apr 8 10:40:51 CEST 2008 -> unflatten_device_tree() size is 1840, allocating... unflattening dfffe7bc... fixed up name for -> fixed up name for chosen -> chosen fixed up name for aliases -> aliases fixed up name for cpus -> cpus fixed up name for PowerPC,8343@0 -> PowerPC,8343 fixed up name for memory -> memory fixed up name for soc8343@e0000000 -> soc8343 fixed up name for wdt@200 -> wdt fixed up name for i2c@3000 -> i2c fixed up name for rtc@68 -> rtc fixed up name for i2c@3100 -> i2c fixed up name for spi@7000 -> spi fixed up name for usb@22000 -> usb fixed up name for mdio@24520 -> mdio fixed up name for ethernet-phy@0 -> ethernet-phy fixed up name for ethernet-phy@1 -> ethernet-phy fixed up name for ethernet@24000 -> ethernet fixed up name for ethernet@25000 -> ethernet fixed up name for serial@4500 -> serial fixed up name for serial@4600 -> serial fixed up name for pic@700 -> pic fixed up name for localbus@e0005000 -> localbus fixed up name for flash@0,0 -> flash <- unflatten_device_tree() Found initrd at 0xdfcb7000:0xdff3f000 console [udbg0] enabled setup_arch: bootmem mvblm7_setup_arch() Unable to handle kernel paging request for data at address 0x00000000 Faulting instruction address: 0xc0012748 Oops: Kernel access of bad area, sig: 11 [#1] PREEMPT mvBlueLYNX-M7 Modules linked in: NIP: c0012748 LR: c0140c10 CTR: 00000000 REGS: c01f9e40 TRAP: 0300 Not tainted (2.6.25-rc8-01197-g1de15bb-dirty= ) MSR: 00001032 CR: 22008048 XER: 20000000 DAR: 00000000, DSISR: 20000000 TASK =3D c01e4510[0] 'swapper' THREAD: c01f8000 GPR00: c0140c84 c01f9ef0 c01e4510 00000000 c0197a7f ffffffff c01f9edc=20 00000000 GPR08: c01f15e4 00000003 c0600b84 0000004d 22002048 ffffffdf 1fffd000=20 00000000 GPR16: ffffffdf ffff7fdf 00000000 00000000 1fff8974 1ff426f8 00000004=20 00288000 GPR24: 00000002 00000000 5f0fffff c01993e4 c01f9f28 c0197a80 c01f8000=20 dffff9e4 Call Trace: [c01f9ef0] [c001c190] (unreliable) [c01f9f10] [c0140c84] [c01f9f20] [c0140ccc] [c01f9f40] [c014145c] [c01f9f60] [c0014014] [c01f9fa0] [c01d1a40] [c01f9fb0] [c01ce64c] [c01f9fc0] [c01c55ac] [c01f9ff0] [00003438] Instruction dump: 3884ffff 8c050001 2c000000 4082fff8 38a5ffff 8c040001 2c000000 9c050001 4082fff4 4e800020 38a3ffff 3884ffff <8c650001> 2c830000 8c040001 7c601851 ---[ end trace 8640abe69a316dee ]--- Kernel panic - not syncing: Attempted to kill the idle task! Rebooting in 180 seconds.. =20 Please let me know if you need more information. regards, Andre MATRIX VISION GmbH, Talstra=DFe 16, DE-71570 Oppenweiler - Registergeric= ht: Amtsgericht Stuttgart, HRB 271090 Gesch=E4ftsf=FChrer: Gerhard Thullner, Werner Armingeon, Uwe Furtner --------------020302030509020500090003 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Scott Wood schrieb: 
On Sat, Apr 05, 2008 at 10:19:49AM +0200, André Schwarz wrote:
  
Kernel starts and crashes with "unable to handle kernel paging request @  
00000000".

After turning debug on in some files I can see that the initrd memory  
gets reserved and the dtb is parsed correctly.
PCI memory/io spaces are set up fine.

At first I thought this is a problem with the device tree since the call  
trace always points to "of_"-functions and "strcmp".
    

Could you provide this call trace?

-Scott

Scott,

thanks for your reply.

please find below the output after the bootm command in u-boot.

My System.map :

...
c00126b8 T strcpy
c00126d4 T strncpy
c0012714 T strcat
c0012740 T strcmp
c0012764 T strlen
c001277c T memcmp
...
c0140bc4 T of_find_property
c0140c74 T of_get_property
c0140ca8 T of_device_is_compatible
c0140d48 T of_match_node
c0140e68 T of_find_matching_node
c0140f20 T of_n_size_cells
c0140f9c T of_n_addr_cells



Log:


# Booting kernel from Legacy Image at ff810000 ...
   Image Name:   2.6.25 mvBL-M7 MPC8343 #1
   Image Type:   PowerPC Linux Kernel Image (uncompressed)
   Data Size:    2084636 Bytes =  2 MB
   Load Address: 00000000
   Entry Point:  00000000
   Verifying Checksum ... OK
   Loading Kernel Image ... OK
OK
## Flattened Device Tree blob at 00000000
   Booting using the fdt blob at 0x600000
## Loading init Ramdisk from Legacy Image at 01000000 ...
   Image Name:   mvBC-1G uInitrd #1.1.03
   Image Type:   PowerPC Linux RAMDisk Image (uncompressed)
   Data Size:    2654208 Bytes =  2.5 MB
   Load Address: 00000000
   Entry Point:  00000000
   Verifying Checksum ... OK
   Loading Ramdisk to 1fcb7000, end 1ff3f000 ... OK
 -> early_init_devtree(c0600000)
search "chosen", depth: 0, uname:
search "chosen", depth: 1, uname: chosen
Looking for initrd properties... <3>initrd_start=0xdfcb7000  initrd_end=0xdff3f000
Command line is: root=/dev/ram ro rootfstype=squashfs
dt_root_size_cells = 1
dt_root_addr_cells = 1
memory scan node memory, reg size 8, data: 0 20000000 2 1,
 - 0 ,  20000000
reserving: 1fcb7000 -> 288001
Phys. mem: 20000000
-> move_device_tree
<- move_device_tree
Scanning CPUs ...
boot cpu: logical 0 physical 0
 <- early_init_devtree()
Using mvBlueLYNX-M7 machine description
Linux version 2.6.25-rc8-01197-g1de15bb-dirty (root@nova) (gcc version 4.0.0 (DENX ELDK 4.1 4.0.0)) #1 PREEMPT Tue Apr 8 10:40:51 CEST 2008
 -> unflatten_device_tree()
  size is 1840, allocating...
  unflattening dfffe7bc...
fixed up name for  ->
fixed up name for chosen -> chosen
fixed up name for aliases -> aliases
fixed up name for cpus -> cpus
fixed up name for PowerPC,8343@0 -> PowerPC,8343
fixed up name for memory -> memory
fixed up name for soc8343@e0000000 -> soc8343
fixed up name for wdt@200 -> wdt
fixed up name for i2c@3000 -> i2c
fixed up name for rtc@68 -> rtc
fixed up name for i2c@3100 -> i2c
fixed up name for spi@7000 -> spi
fixed up name for usb@22000 -> usb
fixed up name for mdio@24520 -> mdio
fixed up name for ethernet-phy@0 -> ethernet-phy
fixed up name for ethernet-phy@1 -> ethernet-phy
fixed up name for ethernet@24000 -> ethernet
fixed up name for ethernet@25000 -> ethernet
fixed up name for serial@4500 -> serial
fixed up name for serial@4600 -> serial
fixed up name for pic@700 -> pic
fixed up name for localbus@e0005000 -> localbus
fixed up name for flash@0,0 -> flash
 <- unflatten_device_tree()
Found initrd at 0xdfcb7000:0xdff3f000
console [udbg0] enabled
setup_arch: bootmem
mvblm7_setup_arch()
Unable to handle kernel paging request for data at address 0x00000000
Faulting instruction address: 0xc0012748
Oops: Kernel access of bad area, sig: 11 [#1]
PREEMPT mvBlueLYNX-M7
Modules linked in:
NIP: c0012748 LR: c0140c10 CTR: 00000000
REGS: c01f9e40 TRAP: 0300   Not tainted  (2.6.25-rc8-01197-g1de15bb-dirty)
MSR: 00001032 <ME,IR,DR>  CR: 22008048  XER: 20000000
DAR: 00000000, DSISR: 20000000
TASK = c01e4510[0] 'swapper' THREAD: c01f8000
GPR00: c0140c84 c01f9ef0 c01e4510 00000000 c0197a7f ffffffff c01f9edc 00000000
GPR08: c01f15e4 00000003 c0600b84 0000004d 22002048 ffffffdf 1fffd000 00000000
GPR16: ffffffdf ffff7fdf 00000000 00000000 1fff8974 1ff426f8 00000004 00288000
GPR24: 00000002 00000000 5f0fffff c01993e4 c01f9f28 c0197a80 c01f8000 dffff9e4
Call Trace:
[c01f9ef0] [c001c190]  (unreliable)
[c01f9f10] [c0140c84]
[c01f9f20] [c0140ccc]
[c01f9f40] [c014145c]
[c01f9f60] [c0014014]
[c01f9fa0] [c01d1a40]
[c01f9fb0] [c01ce64c]
[c01f9fc0] [c01c55ac]
[c01f9ff0] [00003438]
Instruction dump:
3884ffff 8c050001 2c000000 4082fff8 38a5ffff 8c040001 2c000000 9c050001
4082fff4 4e800020 38a3ffff 3884ffff <8c650001> 2c830000 8c040001 7c601851
---[ end trace 8640abe69a316dee ]---
Kernel panic - not syncing: Attempted to kill the idle task!
Rebooting in 180 seconds..  






Please let me know if you need more information.


regards,
Andre

MATRIX VISION GmbH, Talstraße 16, DE-71570 Oppenweiler - Registergericht: Amtsgericht Stuttgart, HRB 271090 Geschäftsführer: Gerhard Thullner, Werner Armingeon, Uwe Furtner
--------------020302030509020500090003--