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uncompressed kernel

Ramesh071
Intellectual 620 points


Hi TI,

I'm working on omap5 based DRA7XX customized board.

I want to build the uImage, which will decompress in u-boot.

Now when I build the uImage,  my kernel is decompressing in "arch/arm/boot/compressed/head.S"

I have tried creating the uImage using Image(uncompressed image). but I'm enable to run it on my board.

How to build the uncompressed uImage, which will compress using mkimage command and uncompress in bootm command.

Kindly help me to resolve this issue..!!

Thanks

Ramappa

  • 0
    TI__Genius 10965 points

    Hi Ramesh,

    What kind of kernel are you using?

    Have you tried the  abootimg command?

    Regards,

    Boyko

     

  • 0 in reply to Boyko Kazakov
    Intellectual 620 points

    Hi Boyko,

    That issue solved.

    I was using the kernel_source/arch/arm/boot/Image.

     

    With this 'Image' I'm creating uImage for my target. And now it is booting.

     

    I'm manually compressing the kernel(Image) with gzip, using Image.gz I'm creating uImage.

    when I run that using bootm it will decompress in u-boot and it will run.

    after that also starting kernel is taking around 1sec.(Highlighted time with red colour)

    [14.159988 0.005029]    Using Device Tree in place at 81f80000, end 81f8ac2c
    [14.165923 0.005935]
    [14.165951 0.000028] Starting kernel ...
    [14.167919 0.001968]
    [15.256927 1.089008] [    0.000000] Booting Linux on physical CPU 0x0
    [15.261913 0.004986] [    0.000000] Linux version 3.8.13-dirty (ramappa@Ramappa-HP-xw4600-Workstation) (gcc version 4.7 (GCC) ) #7 SMP PREEMPT Tue Jan 28 15:26:48 IST 2014
    [15.275913 0.014000] [    0.000000] CPU: ARMv7 Processor [412fc0f2] revision 2 (ARMv7), cr=10c53c7d

    why it is taking one second. during this time what is happening.

    I want to reduce this time, how can I do this.

     

    Kindly help me on this.

     

     

    Thanks

    Ramappa