AnsweredAssumed Answered

mx25 doesn't boot linux after reset

Question asked by Cafer Kockan on Jul 22, 2013
Latest reply on Jul 22, 2013 by Cafer Kockan
Branched to a new discussion

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 (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.


MXC IRQ initialized

MXC GPIO hardware

mxc_clocksource_init: 66500000


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.


Cafer Koçkan