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@f8000000/ethernet@24000";
ethernet1 = "/soc8641@f8000000/ethernet@25000";
ethernet2 = "/soc8641@f8000000/ethernet@26000";
ethernet3 = "/soc8641@f8000000/ethernet@27000";
serial0 = "/soc8641@f8000000/serial@4500";
};
cpus {
#address-cells = <0x1>;
#size-cells = <0x0>;
PowerPC,8641@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@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@0,0 {
compatible = "cfi-flash";
reg = <0x0 0x0 0x800000>;
bank-width = <0x2>;
device-width = <0x2>;
#address-cells = <0x1>;
#size-cells = <0x1>;
};
};
soc8641@f8000000 {
#address-cells = <0x1>;
#size-cells = <0x1>;
device_type = "soc";
compatible = "simple-bus";
ranges = <0x0 0xf8000000 0x100000>;
bus-frequency = <0x0>;
mcm-law@0 {
compatible = "fsl,mcm-law";
reg = <0x0 0x1000>;
fsl,num-laws = <0xa>;
};
mcm@1000 {
compatible = "fsl,mpc8641-mcm", "fsl,mcm";
reg = <0x1000 0x1000>;
interrupts = <0x11 0x2>;
interrupt-parent = <0x1>;
};
dma@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@0 {
compatible = "fsl,mpc8641-dma-channel",
"fsl,eloplus-dma-channel";
reg = <0x0 0x80>;
cell-index = <0x0>;
interrupt-parent = <0x1>;
interrupts = <0x14 0x2>;
};
dma-channel@80 {
compatible = "fsl,mpc8641-dma-channel",
"fsl,eloplus-dma-channel";
reg = <0x80 0x80>;
cell-index = <0x1>;
interrupt-parent = <0x1>;
interrupts = <0x15 0x2>;
};
dma-channel@100 {
compatible = "fsl,mpc8641-dma-channel",
"fsl,eloplus-dma-channel";
reg = <0x100 0x80>;
cell-index = <0x2>;
interrupt-parent = <0x1>;
interrupts = <0x16 0x2>;
};
dma-channel@180 {
compatible = "fsl,mpc8641-dma-channel",
"fsl,eloplus-dma-channel";
reg = <0x180 0x80>;
cell-index = <0x3>;
interrupt-parent = <0x1>;
interrupts = <0x17 0x2>;
};
};
ethernet@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@520 {
#address-cells = <0x1>;
#size-cells = <0x0>;
compatible = "fsl,gianfar-mdio";
reg = <0x520 0x20>;
ethernet-phy@0 {
interrupt-parent = <0x1>;
interrupts = <0xa 0x1>;
reg = <0x0>;
device_type = "ethernet-phy";
linux,phandle = <0x3>;
};
ethernet-phy@1 {
interrupt-parent = <0x1>;
interrupts = <0xa 0x1>;
reg = <0x1>;
device_type = "ethernet-phy";
linux,phandle = <0x5>;
};
ethernet-phy@2 {
interrupt-parent = <0x1>;
interrupts = <0xa 0x1>;
reg = <0x2>;
device_type = "ethernet-phy";
linux,phandle = <0x7>;
};
ethernet-phy@3 {
interrupt-parent = <0x1>;
interrupts = <0xa 0x1>;
reg = <0x3>;
device_type = "ethernet-phy";
linux,phandle = <0x9>;
};
tbi-phy@11 {
reg = <0x11>;
device_type = "tbi-phy";
linux,phandle = <0x2>;
};
};
};
ethernet@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@520 {
#address-cells = <0x1>;
#size-cells = <0x0>;
compatible = "fsl,gianfar-tbi";
reg = <0x520 0x20>;
tbi-phy@11 {
reg = <0x11>;
device_type = "tbi-phy";
linux,phandle = <0x4>;
};
};
};
ethernet@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@520 {
#address-cells = <0x1>;
#size-cells = <0x0>;
compatible = "fsl,gianfar-tbi";
reg = <0x520 0x20>;
tbi-phy@11 {
reg = <0x11>;
device_type = "tbi-phy";
linux,phandle = <0x6>;
};
};
};
ethernet@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@520 {
#address-cells = <0x1>;
#size-cells = <0x0>;
compatible = "fsl,gianfar-tbi";
reg = <0x520 0x20>;
tbi-phy@11 {
reg = <0x11>;
device_type = "tbi-phy";
linux,phandle = <0x8>;
};
};
};
serial@4500 {
cell-index = <0x0>;
device_type = "serial";
compatible = "ns16550";
reg = <0x4500 0x100>;
clock-frequency = <0x0>;
interrupts = <0x2a 0x2>;
interrupt-parent = <0x1>;
};
pic@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@e0000 {
compatible = "fsl,mpc8641-guts";
reg = <0xe0000 0x1000>;
fsl,has-rstcr;
};
};
chosen {
linux,stdout-path = "/soc8641/serial0: serial@4500";
};
};
On Thu, Dec 26, 2013 at 2:37 PM, wyang <w90p710(a)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@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@lists.ozlabs.orghttps://lists.ozlabs.org/listinfo/linuxppc-dev
>
>
>
