MPC8641 based custom board kernel Bug

Ashish Khetan curieux.khetan at gmail.com
Thu Dec 26 22:48:23 EST 2013


i tried to dig more inside mpic_alloc fails. the function
of_find_matching_node calls inside from mpic_alloc() should return the node
at which pic is connected but it returns NULL. but why? In device tree i am
using the following.. may be it will helpful.
/dts-v1/;

/ {
    model = "MPC8641HPCN";
    compatible = "fsl,mpc8641hpcn";
    #address-cells = <0x1>;
    #size-cells = <0x1>;

    aliases {
        ethernet0 = "/soc8641 at f8000000/ethernet at 24000";
        ethernet1 = "/soc8641 at f8000000/ethernet at 25000";
        ethernet2 = "/soc8641 at f8000000/ethernet at 26000";
        ethernet3 = "/soc8641 at f8000000/ethernet at 27000";
        serial0 = "/soc8641 at f8000000/serial at 4500";
    };

    cpus {
        #address-cells = <0x1>;
        #size-cells = <0x0>;

        PowerPC,8641 at 0 {
            device_type = "cpu";
            reg = <0x0>;
            d-cache-line-size = <0x20>;
            i-cache-line-size = <0x20>;
            d-cache-size = <0x8000>;
            i-cache-size = <0x8000>;
            timebase-frequency = <0x0>;
            bus-frequency = <0x0>;
            clock-frequency = <0x0>;
        };
    };

    memory {
        device_type = "memory";
        reg = <0x0 0x20000000>;
    };

    localbus at f8005000 {
        #address-cells = <0x2>;
        #size-cells = <0x1>;
        compatible = "fsl,mpc8641-localbus", "simple-bus";
        reg = <0xf8005000 0x1000>;
        interrupts = <0x13 0x2>;
        interrupt-parent = <0x1>;
        ranges = <0x0 0x0 0xff000000 0x1000000>;

        flash at 0,0 {
            compatible = "cfi-flash";
            reg = <0x0 0x0 0x800000>;
            bank-width = <0x2>;
            device-width = <0x2>;
            #address-cells = <0x1>;
            #size-cells = <0x1>;
        };
    };

    soc8641 at f8000000 {
        #address-cells = <0x1>;
        #size-cells = <0x1>;
        device_type = "soc";
        compatible = "simple-bus";
        ranges = <0x0 0xf8000000 0x100000>;
        bus-frequency = <0x0>;

        mcm-law at 0 {
            compatible = "fsl,mcm-law";
            reg = <0x0 0x1000>;
            fsl,num-laws = <0xa>;
        };

        mcm at 1000 {
            compatible = "fsl,mpc8641-mcm", "fsl,mcm";
            reg = <0x1000 0x1000>;
            interrupts = <0x11 0x2>;
            interrupt-parent = <0x1>;
        };

        dma at 21300 {
            #address-cells = <0x1>;
            #size-cells = <0x1>;
            compatible = "fsl,mpc8641-dma", "fsl,eloplus-dma";
            reg = <0x21300 0x4>;
            ranges = <0x0 0x21100 0x200>;
            cell-index = <0x0>;

            dma-channel at 0 {
                compatible = "fsl,mpc8641-dma-channel",
"fsl,eloplus-dma-channel";
                reg = <0x0 0x80>;
                cell-index = <0x0>;
                interrupt-parent = <0x1>;
                interrupts = <0x14 0x2>;
            };

            dma-channel at 80 {
                compatible = "fsl,mpc8641-dma-channel",
"fsl,eloplus-dma-channel";
                reg = <0x80 0x80>;
                cell-index = <0x1>;
                interrupt-parent = <0x1>;
                interrupts = <0x15 0x2>;
            };

            dma-channel at 100 {
                compatible = "fsl,mpc8641-dma-channel",
"fsl,eloplus-dma-channel";
                reg = <0x100 0x80>;
                cell-index = <0x2>;
                interrupt-parent = <0x1>;
                interrupts = <0x16 0x2>;
            };

            dma-channel at 180 {
                compatible = "fsl,mpc8641-dma-channel",
"fsl,eloplus-dma-channel";
                reg = <0x180 0x80>;
                cell-index = <0x3>;
                interrupt-parent = <0x1>;
                interrupts = <0x17 0x2>;
            };
        };

        ethernet at 24000 {
            #address-cells = <0x1>;
            #size-cells = <0x1>;
            cell-index = <0x0>;
            device_type = "network";
            model = "TSEC";
            compatible = "gianfar";
            reg = <0x24000 0x1000>;
            ranges = <0x0 0x24000 0x1000>;
            local-mac-address = [00 00 00 00 00 00];
            interrupts = <0x1d 0x2 0x1e 0x2 0x22 0x2>;
            interrupt-parent = <0x1>;
            tbi-handle = <0x2>;
            phy-handle = <0x3>;
            phy-connection-type = "rgmii-id";

            mdio at 520 {
                #address-cells = <0x1>;
                #size-cells = <0x0>;
                compatible = "fsl,gianfar-mdio";
                reg = <0x520 0x20>;

                ethernet-phy at 0 {
                    interrupt-parent = <0x1>;
                    interrupts = <0xa 0x1>;
                    reg = <0x0>;
                    device_type = "ethernet-phy";
                    linux,phandle = <0x3>;
                };

                ethernet-phy at 1 {
                    interrupt-parent = <0x1>;
                    interrupts = <0xa 0x1>;
                    reg = <0x1>;
                    device_type = "ethernet-phy";
                    linux,phandle = <0x5>;
                };

                ethernet-phy at 2 {
                    interrupt-parent = <0x1>;
                    interrupts = <0xa 0x1>;
                    reg = <0x2>;
                    device_type = "ethernet-phy";
                    linux,phandle = <0x7>;
                };

                ethernet-phy at 3 {
                    interrupt-parent = <0x1>;
                    interrupts = <0xa 0x1>;
                    reg = <0x3>;
                    device_type = "ethernet-phy";
                    linux,phandle = <0x9>;
                };

                tbi-phy at 11 {
                    reg = <0x11>;
                    device_type = "tbi-phy";
                    linux,phandle = <0x2>;
                };
            };
        };

        ethernet at 25000 {
            #address-cells = <0x1>;
            #size-cells = <0x1>;
            cell-index = <0x1>;
            device_type = "network";
            model = "TSEC";
            compatible = "gianfar";
            reg = <0x25000 0x1000>;
            ranges = <0x0 0x25000 0x1000>;
            local-mac-address = [00 00 00 00 00 00];
            interrupts = <0x23 0x2 0x24 0x2 0x28 0x2>;
            interrupt-parent = <0x1>;
            tbi-handle = <0x4>;
            phy-handle = <0x5>;
            phy-connection-type = "rgmii-id";

            mdio at 520 {
                #address-cells = <0x1>;
                #size-cells = <0x0>;
                compatible = "fsl,gianfar-tbi";
                reg = <0x520 0x20>;

                tbi-phy at 11 {
                    reg = <0x11>;
                    device_type = "tbi-phy";
                    linux,phandle = <0x4>;
                };
            };
        };

        ethernet at 26000 {
            #address-cells = <0x1>;
            #size-cells = <0x1>;
            cell-index = <0x2>;
            device_type = "network";
            model = "TSEC";
            compatible = "gianfar";
            reg = <0x26000 0x1000>;
            ranges = <0x0 0x26000 0x1000>;
            local-mac-address = [00 00 00 00 00 00];
            interrupts = <0x1f 0x2 0x20 0x2 0x21 0x2>;
            interrupt-parent = <0x1>;
            tbi-handle = <0x6>;
            phy-handle = <0x7>;
            phy-connection-type = "rgmii-id";

            mdio at 520 {
                #address-cells = <0x1>;
                #size-cells = <0x0>;
                compatible = "fsl,gianfar-tbi";
                reg = <0x520 0x20>;

                tbi-phy at 11 {
                    reg = <0x11>;
                    device_type = "tbi-phy";
                    linux,phandle = <0x6>;
                };
            };
        };

        ethernet at 27000 {
            #address-cells = <0x1>;
            #size-cells = <0x1>;
            cell-index = <0x3>;
            device_type = "network";
            model = "TSEC";
            compatible = "gianfar";
            reg = <0x27000 0x1000>;
            ranges = <0x0 0x27000 0x1000>;
            local-mac-address = [00 00 00 00 00 00];
            interrupts = <0x25 0x2 0x26 0x2 0x27 0x2>;
            interrupt-parent = <0x1>;
            tbi-handle = <0x8>;
            phy-handle = <0x9>;
            phy-connection-type = "rgmii-id";

            mdio at 520 {
                #address-cells = <0x1>;
                #size-cells = <0x0>;
                compatible = "fsl,gianfar-tbi";
                reg = <0x520 0x20>;

                tbi-phy at 11 {
                    reg = <0x11>;
                    device_type = "tbi-phy";
                    linux,phandle = <0x8>;
                };
            };
        };

        serial at 4500 {
            cell-index = <0x0>;
            device_type = "serial";
            compatible = "ns16550";
            reg = <0x4500 0x100>;
            clock-frequency = <0x0>;
            interrupts = <0x2a 0x2>;
            interrupt-parent = <0x1>;
        };

        pic at 40000 {
            interrupt-controller;
            #address-cells = <0x0>;
            #interrupt-cells = <0x2>;
            reg = <0x40000 0x40000>;
            compatible = "chrp,open-pic";
            device_type = "open-pic";
            linux,phandle = <0x1>;
            phandle = <0x1>;
        };

        global-utilities at e0000 {
            compatible = "fsl,mpc8641-guts";
            reg = <0xe0000 0x1000>;
            fsl,has-rstcr;
        };
    };

    chosen {
        linux,stdout-path = "/soc8641/serial0: serial at 4500";
    };
};




On Thu, Dec 26, 2013 at 2:37 PM, wyang <w90p710 at gmail.com> wrote:

>  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 at 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 listLinuxppc-dev at lists.ozlabs.orghttps://lists.ozlabs.org/listinfo/linuxppc-dev
>
>
>
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