Kernel hangs at Virtual kernel memory layout: No SLUB info ?

[prasannamuthraj]

Custom board imx6dl Hangs at Virtual Kernel Memory Layout.

Source : boundary-imx_3.10.17_1.0.0_ga

Appended imx6q-arm2-dtb to zImage to boot from 2009 uboot.

Uboot> bootm

## Booting kernel from Legacy Image at 10800000 ...

   Image Name:

   Image Type:   ARM Linux Kernel Image (uncompressed)

   Data Size:    5936480 Bytes =  5.7 MB

   Load Address: 10008000

   Entry Point:  10008000

   Verifying Checksum ... OK

   Loading Kernel Image ... OK

command line: console=ttymxc1,115200 rdinit=/linuxrc is being passed to the kernel

## Passing machid: 0x00000efd - 3837

## Transferring control to Linux (at address 10008000) ...

cleanup_before_linux...

Starting kernel...

Uncompressing Linux... done, booting the kernel.

[    0.000000] Linux version 3.10.17-g898627a-dirty (usr@ubuntu) (gcc version 4.5.2 20101026 (prerelease) (GCC) ) #10 SMP PREEMPT Fri Oct 17 13:09:48 EDT 2014

[    0.000000] CPU: ARMv7 Processor [412fc09a] revision 10 (ARMv7), cr=10c53c7d

[    0.000000] CPU: PIPT / VIPT nonaliasing data cache, VIPT aliasing instruction cache

[    0.000000] Memory policy: ECC disabled, Data cache writealloc

[    0.000000] Built 1 zonelists in Zone order, mobility grouping on.  Total pages: 260096

[    0.000000] Kernel command line: console=ttymxc1,115200 gpmi_nand_part gpmi-nfc enable_wait_mode=off fec_mac=00:1E:AE:11:22:33 loglevel=6 gpmi_debug_init earlyprintk root=/dev/mmcblk0p1 rootfstype=ext2 rootwait rw

[    0.000000] Memory: 685720k/685720k available, 362856k reserved, 0K highmem

[    0.000000] Virtual kernel memory layout:

[    0.000000]     vector  : 0xffff0000 - 0xffff1000   (   4 kB)

[    0.000000]     fixmap  : 0xfff00000 - 0xfffe0000   ( 896 kB)

[    0.000000]     vmalloc : 0xc0800000 - 0xff000000   (1000 MB)

[    0.000000]     lowmem  : 0x80000000 - 0xc0000000   (1024 MB)

[    0.000000]     pkmap   : 0x7fe00000 - 0x80000000   (   2 MB)

[    0.000000]     modules : 0x7f000000 - 0x7fe00000   (  14 MB)

[    0.000000]       .text : 0x80008000 - 0x80d4a6e4   (13578 kB)

[    0.000000]       .init : 0x80d4b000 - 0x80f04c40   (1768 kB)

[    0.000000]       .data : 0x80f06000 - 0x80f76250   ( 449 kB)

[    0.000000]        .bss : 0x80f76250 - 0x815f8820   (6666 kB)

No stub info is printed and it hangs

[igorpadykov]

Hi prasanna

you are using imx6dl, while dtb is for another processor - imx6q-arm2-dtb.

imx6dl and imx6q are not fully compatible with each other.

You should use smth like *imx6dl*.dtb

linux/arch/arm/boot/dts at master · torvalds/linux · GitHub

Best regards

igor

[prasannamuthraj]

I'm using imx6 dual SoC , tried  nitrogen6x, wandaboard dtb reference, none of them works. It still hangs at ,

Virtual kernel memory layout:

    vector  : 0xffff0000 - 0xffff1000   (   4 kB)

    fixmap  : 0xfff00000 - 0xfffe0000   ( 896 kB)

    vmalloc : 0xc0800000 - 0xff000000   (1000 MB)

    lowmem  : 0x80000000 - 0xc0000000   (1024 MB)

    pkmap   : 0x7fe00000 - 0x80000000   (   2 MB)

    modules : 0x7f000000 - 0x7fe00000   (  14 MB)

      .text : 0x80008000 - 0x80beca20   (12179 kB)

      .init : 0x80bed000 - 0x80c312c0   ( 273 kB)

      .data : 0x80c32000 - 0x80c814e0   ( 318 kB)

       .bss : 0x80c814e0 - 0x80cea764   ( 421 kB)

þøÿ

are there any specific change to be made to any of those dts ? I'm having 1GB DDR3 RAM  ( 4x256M ) with imx6dl SoC.

[igorpadykov]

Please try below BSP it has all necessary files

L3.10.17_1.0.0_IMX6QDLS_BUNDLE : Source Code Download Steps Documentation and Demo Images.

Also for custom board one needs to get DDR parameters (calibration settings) and use them

https://community.freescale.com/docs/DOC-96412

Best regards

igor

[prasannamuthraj]

DDR is already calibrated in uboot, for the board.

tried appending the fsl L3.10.17_1.0.0_ga_140404_images_MX6 dtb to my built uImage & also zImage( mkimage) and booted, still hangs at same place.

are SLUBs info missing because of wrong device tree blob memory configuration?

[igorpadykov]

Hi prasanna

this error may be caused by memory misconfiguration.

If your board is based on sabre-lite design please post this

to boundary devices forum, they should have correct configuration

files for such boards

http://boundarydevices.com/community/

~igor

[prasannamuthraj]

The board is not based on sabre lite design , are there minimal kernel & dtb configuration to test with 1GB of RAM ?

[igorpadykov]

L3.10.17_1.0.0_IMX6QDLS_BUNDLE : Source Code Download Steps Documentation and Demo Images.

[prasannamuthraj]

Well the board is having custom clock configuration having differences compared to sabresd. It seems like this is causing the issue in of_clk_init() in drivers/clk/clk.c where it scans the device tree for matching clock providers and  calls their initialization functions, imx6dl.dtsi have them configured as same for all boards?

[prasannamuthraj]

Solved the issue by making the xtal clock configurations and uart initialization in device tree.