Re: MPC8641 based custom board kernel Bug

wyang <w90p710@xxxxxxxxx> · Thu, 26 Dec 2013 17:07:23 +0800



    On 12/26/2013 01:09 PM, Ashish Khetan
      wrote:

    
            Hi,

            
            I was trying to port Linux-3.12 for MPC8641 based custom
            designed board for evaluation purpose. I have been facing a
            kernel bug at mpic initialization. Is somebody have faced
            this kind of bugs or can give me any pointer for further
            steps how to solve kernel bugs will be really helpful. here
            is the snapshot for the bug that may be helpful to address
            the bug.

            Using MPC86xx HPCN machine description

            Total memory = 512MB; using 1024kB for hash table (at
            cff00000)

            Linux version 3.12.0 (ashish@ashish-VirtualBox) (gcc version
            4.7.2 (GCC) ) #2 We

            d Dec 25 16:04:36 IST 2013

            Found initrd at 0xde975000:0xdfec428a

            bootconsole [udbg0] enabled

            setup_arch: bootmem

            mpc86xx_hpcn_setup_arch()

            MPC86xx HPCN board from Freescale Semiconductor

            arch: exit

            Zone ranges:

              DMA      [mem 0x00000000-0x1fffffff]

              Normal   empty

              HighMem  empty

            Movable zone start for each node

            Early memory node ranges

              node   0: [mem 0x00000000-0x1fffffff]

            Built 1 zonelists in Zone order, mobility grouping on. 
            Total pages: 130048

            Kernel command line: root=/dev/ram0 rw rootfs
            console=ttyS0,115200

            PID hash table entries: 2048 (order: 1, 8192 bytes)

            Dentry cache hash table entries: 65536 (order: 6, 262144
            bytes)

            Inode-cache hash table entries: 32768 (order: 5, 131072
            bytes)

            Sorting __ex_table...

            Memory: 424980K/524288K available (4172K kernel code, 208K
            rwdata, 1304K rodata,

             196K init, 149K bss, 99308K reserved, 0K highmem)

            Kernel virtual memory layout:

              * 0xfffcf000..0xfffff000  : fixmap

              * 0xff800000..0xffc00000  : highmem PTEs

              * 0xff7fe000..0xff800000  : early ioremap

              * 0xe1000000..0xff7fe000  : vmalloc & ioremap

            SLUB: HWalign=32, Order=0-3, MinObjects=0, CPUs=1, Nodes=1

            NR_IRQS:512 nr_irqs:512 16

            ------------[ cut here ]------------

            kernel BUG at arch/powerpc/platforms/86xx/pic.c:42!

          
    It hints that mpic_alloc() fails. Maybe, you should spend some time
    investigating why it fails. :-) 

    
    Thanks

    Wei

    
          Oops: Exception in kernel mode, sig: 5 [#1]

            MPC86xx HPCN

            Modules linked in:

            CPU: 0 PID: 0 Comm: swapper Not tainted 3.12.0 #2

            task: c05903e0 ti: c05b4000 task.ti: c05b4000

            NIP: c0567438 LR: c0567430 CTR: c0567400

            REGS: c05b5ee0 TRAP: 0700   Not tainted  (3.12.0)

            MSR: 00021032 <ME,IR,DR,RI>  CR: 24000042  XER:
            20000000

            
            GPR00: c0567430 c05b5f90 c05903e0 00000000 c04e4ff8 c051e588
            0000008f 00000002

            GPR08: c042789c 00000001 0000006f 00000000 22000048 bebffffd
            11a7b4e5 200c8000

            GPR16: ffbeffff ffffffff 00000000 00000024 00000000 1fec56f8
            1fec59a7 00000000

            GPR24: 00000000 1fff97e8 40000000 1ffcc6a0 c0bff080 c05c2490
            c05c2628 c0585b60

            NIP [c0567438] mpc86xx_init_irq+0x38/0x108

            LR [c0567430] mpc86xx_init_irq+0x30/0x108

            Call Trace:

            [c05b5f90] [c0567430] mpc86xx_init_irq+0x30/0x108
            (unreliable)

            [c05b5fb0] [c0562784] init_IRQ+0x24/0x38

            [c05b5fc0] [c055fde4] start_kernel+0x1bc/0x2ec

            [c05b5ff0] [00003444] 0x3444

            Instruction dump:

            3d00c04f 38800000 38a01002 38c00000 38e00100 39088f8c
            38600000 90010024

            bfa10014 4bffec35 7c690034 5529d97e <0f090000>
            3fa0c04f 4bfff391 38600000

            ---[ end trace 31fd0ba7d8756001 ]---

            
            Kernel panic - not syncing: Attempted to kill the idle task!

            Rebooting in 180 seconds..

            
          Thanks & Regards

        
        Ashish Khetan

      
      _______________________________________________
Linuxppc-dev mailing list
Linuxppc-dev@xxxxxxxxxxxxxxxx
https://lists.ozlabs.org/listinfo/linuxppc-dev
    
    
_______________________________________________
Kernelnewbies mailing list
Kernelnewbies@xxxxxxxxxxxxxxxxx
http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies