mx25 doesn't boot linux after reset

[darlink]

i have mx253 based design. thousand of devices are on the field.

i have been searching root cause of device crash on the field. in one type of problem cases, device boot linux without a problem after POR reset but after watchdog reset or after RESET_B, u-boot runs without a problem but linux doesn't boot and stop after those lines below;

This happens not after every watchdog reboot. it happens sometimes.

"......

,,,,,,

Starting kernel ...

Uncompressing Linux... done, booting the kernel."

this case happens just in some devices and i couldnt find why.

first i thought that it may caused from wrong command line argument from u-boot about console but i got this log below from __log_buf and it says that something else is wrong.

here is the log i catch from __log_buf, red lines doesn't appear in a normal boot sequence. this might be a clue, but i dont know where to look at.

Please give me an idea about this matter.

inux version 2.6.36.1 (cafer@cafer-ThinkPad-T410) (gcc version 4.1.2)#106 PREEMPT Thu Jul 18 14:47:37 EEST 2013

CPU: ARM926EJ-S [41069264] revision 4 (ARMv5TEJ), cr=00053177

CPU: VIVT data cache, VIVT instruction cache

Machine: Freescale MX25 PDK (3DS)

Memory policy: ECC disabled, Data cache writeback

On node 0 totalpages: 16384.

free_area_init_node: node 0, pg dat c0412d98, node_mem_map c0453000.

  Normal zone: 128 pages used for memmap.

  Normal zone:0 pages reserved.

  Normal zone: 16256 pages, LIFO batch:3

Built 1 zonelists in Zone order, mobility grouping on. Total pages: 16256

Kernel command line: console=ttymxc0,115200 ubi.mtd=3,2048 root=ubi0:nand.ubifs ip=none rootflags=sync rootfstype=ubifs

PID hash table entries: 256 (order: -2, 1024 bytes)

Dentry cache hash table entries: 8192 (order: 3, 32768 bytes)

Inode-cache hash table entries: 4096 (order: 2, 16384 bytes)

Memory: 64MB = 64MB total

Memory: 60548k/60548k available, 4988k reserved, 0K highmem

Virtual kernel memory layout:

    vector  : 0xffff0000 - 0xffff1000   (   4 kB)

    fixmap  : 0xfff00000 - 0xfffe0000   ( 896 kB)

    DMA     : 0xffc00000 - 0xffe00000   (   2 MB)

    vmalloc : 0xc4800000 - 0xf4000000   ( 760 MB)

    lowmem  : 0xc0000000 - 0xc4000000   (  64 MB)

    modules : 0xbf000000 - 0xc0000000   (  16 MB)

      .init : 0xc0008000 - 0xc0027000   ( 124 kB)

      .text : 0xc0027000 - 0xc03d3000   (3760 kB)

      .data : 0xc03f0000 - 0xc04133a0   ( 141 kB)

Hierarchical RCU implementation.

  RCU-based detection of stalled CPUs is disabled.

  Verbose stalled-CPUs detection is disabled.

NR_IRQS:208

MXC IRQ initialized

MXC GPIO hardware

mxc_clocksource_init: 66500000

timer_is_v2:1

mult: 15768060

shift: 20

Console: colour dummy device 80x30

ODEBUG: 3 of 3 active objects replaced

ODEBUG: selftest passed

Calibrating delay loop... 199.06 BogoMIPS (lpj=995328)

pid_max: default: 32768 minimum: 301

Mount-cache hash table entries: 512

CPU: Testing write buffer coherency: ok

Thanks in advance.

Regards,

Cafer Koçkan

[darlink]

__log_buf crash full log is here

Linux version 2.6.36.1 (cafer@cafer-ThinkPad-T410) (gcc version 4.1.2)#106 PREEMPT Thu Jul 18 14:47:37 EEST 2013

CPU: ARM926EJ-S [41069264] revision 4 (ARMv5TEJ), cr=00053177

CPU: VIVT data cache, VIVT instruction cache

Machine: Freescale MX25 PDK (3DS)

Memory policy: ECC disabled, Data cache writeback

On node 0 totalpages: 16384.

free_area_init_node: node 0, pg dat c0412d98, node_mem_map c0453000.

  Normal zone: 128 pages used for memmap.

  Normal zone:0 pages reserved.

  Normal zone: 16256 pages, LIFO batch:3

Built 1 zonelists in Zone order, mobility grouping on. Total pages: 16256

Kernel command line: console=ttymxc0,115200 ubi.mtd=3,2048 root=ubi0:nand.ubifs ip=none rootflags=sync rootfstype=ubifs

PID hash table entries: 256 (order: -2, 1024 bytes)

Dentry cache hash table entries: 8192 (order: 3, 32768 bytes)

Inode-cache hash table entries: 4096 (order: 2, 16384 bytes)

Memory: 64MB = 64MB total

Memory: 60548k/60548k available, 4988k reserved, 0K highmem

Virtual kernel memory layout:

    vector  : 0xffff0000 - 0xffff1000   (   4 kB)

    fixmap  : 0xfff00000 - 0xfffe0000   ( 896 kB)

    DMA     : 0xffc00000 - 0xffe00000   (   2 MB)

    vmalloc : 0xc4800000 - 0xf4000000   ( 760 MB)

    lowmem  : 0xc0000000 - 0xc4000000   (  64 MB)

    modules : 0xbf000000 - 0xc0000000   (  16 MB)

      .init : 0xc0008000 - 0xc0027000   ( 124 kB)

      .text : 0xc0027000 - 0xc03d3000   (3760 kB)

      .data : 0xc03f0000 - 0xc04133a0   ( 141 kB)

Hierarchical RCU implementation.

  RCU-based detection of stalled CPUs is disabled.

  Verbose stalled-CPUs detection is disabled.

NR_IRQS:208

MXC IRQ initialized

MXC GPIO hardware

mxc_clocksource_init: 66500000

timer_is_v2:1

mult: 15768060

shift: 20

Console: colour dummy device 80x30

ODEBUG: 3 of 3 active objects replaced

ODEBUG: selftest passed

Calibrating delay loop... 199.06 BogoMIPS (lpj=995328)

pid_max: default: 32768 minimum: 301

Mount-cache hash table entries: 512

CPU: Testing write buffer coherency: ok

Unable to handle kernel paging request at virtual address 0000fffe.

pgd = c0004000.

[0000fffe] *pgd=00000000.

Internal error: Oops: 5 [#1] PREEMPT.

last sysfs file: .

Modules linked in:.

CPU: 0    Not tainted  (2.6.36.1 #106).

PC is at strcmp+0x4/0x2c.....R is at sysctl_check_table+0x244/0x390.

pc : [<c01a3680>]    lr : [<c005c718>]    psr: 20000013.

sp : c3823f3.

sp : c3823f28  ip : c3823f18  fp : 00000000.

r10: 00000002  r9 : c03f85c8  r8 : c03f7a70.

r7 : c03f6e04  r6 : 00000001  r5 : c03f7a70  r4 : c03fe6bc.

r3 : 0000fffe  r2 : 0000fffe  r1 : 0000fffe  r0 : 0000fffe.<4>Flags: nzCv  IRQs on  FIQs on  Mo