Rok Markovic wrote:
Hi
I would like to ask what could be a problem or how could I start
debuging it.
My board is cm-x270 from compulab and it successfully boot until it should
start init from busysbox. I get the folowing report.
environment:
pxa270
128Mb RAM
network boot
gcc 3.4.5 softfloat
Linux image detected in memory at 0xA0100000, booting...
[snip]
pxa2xx-fb: probe of pxa2xx-fb failed with error -22
Serial: 8250/16550 driver $Revision: 1.90 $ 4 ports, IRQ sharing disabled
[snip]
RAMDISK driver initialized: 4 RAM disks of 4096K size 1024 blocksize
bootserver=0.0.0.0, rootserver=192.168.10.124, rootpath=
Looking up port of RPC 100003/2 on 192.168.10.124
Looking up port of RPC 100005/1 on 192.168.10.124
VFS: Mounted root (nfs filesystem).
Freeing init memory: 108K
Unable to handle kernel NULL pointer dereference at virtual address
00000004
pgd = c0004000
[00000004] *pgd=00000000
Internal error: Oops: f5 [#1]
Modules linked in:
CPU: 0 Not tainted (2.6.22-cm-x270 #2)
PC is at init_dev+0x38/0x5b8
LR is at tty_open+0xf8/0x33c
pc : [<c0135dd8>] lr : [<c0136450>] psr: 60000013
[snip]
3fe0: 00000000 00000000 00000000 c0423ff8 c003c9e8 c0008b30 e1a01007
ebfd4ec0
Backtrace:
[<c0135da0>] (init_dev+0x0/0x5b8) from [<c0136450>] (tty_open+0xf8/0x33c)
[<c0136358>] (tty_open+0x0/0x33c) from [<c0088600>]
(chrdev_open+0x114/0x174)
r8:c04e0d20 r7:00000000 r6:00000000 r5:c048f76c r4:c02e5c3c
[<c00884ec>] (chrdev_open+0x0/0x174) from [<c00847d0>]
(__dentry_open+0x188/0x228)
r8:c0531c80 r7:c04ae364 r6:c00884ec r5:c048f76c r4:c04e0d20
[<c0084648>] (__dentry_open+0x0/0x228) from [<c00848a4>]
(nameidata_to_filp+0x34/0x4c)
[<c0084870>] (nameidata_to_filp+0x0/0x4c) from [<c0084908>]
(do_filp_open+0x4c/0x50)
r4:00000002
[<c00848bc>] (do_filp_open+0x0/0x50) from [<c0084c48>]
(do_sys_open+0x5c/0xec)
r5:00000000 r4:00000002
[<c0084bec>] (do_sys_open+0x0/0xec) from [<c0084cfc>] (sys_open+0x24/0x28)
[<c0084cd8>] (sys_open+0x0/0x28) from [<c0023300>] (init_post+0x2c/0xfc)
[<c00232d4>] (init_post+0x0/0xfc) from [<c0008c80>]
(kernel_init+0x15c/0x2bc)
r4:c02afed8
[<c0008b24>] (kernel_init+0x0/0x2bc) from [<c003c9e8>] (do_exit+0x0/0x86c)
Code: e3a03000 e5823000 059030b8 e1a06000 (07935107)
Kernel panic - not syncing: Attempted to kill init!
I think you have conflict between PXA serial and 8250 drivers. Make sure you use
only one of them.
If you need to use PCMCIA serial cards, please see
http://lists.arm.linux.org.uk/pipermail/linux-arm-kernel/2007-July/040604.html
--
Sincerely yours,
Mike.
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