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PSP 4.2.0.7 Kernel Build Instructions

Ken Koller
Intellectual 770 points
Other Parts Discussed in Thread: AM3517

Hi,

I think the manual can use some minor edits. Please see:

http://processors.wiki.ti.com/index.php/AM35x-OMAP35x-PSP_04.02.00.07_UserGuide#Compiling_Linux_Kernel

And copied here:

  1. Change to the base of the Linux kernel source directory.
    $ cd ./kernel

    Should this be:

    $ cd ./linux
  2. Remove the intermediate files generated during build. This step is not necessary when building for the first time.
    $ make CROSS_COMPILE=arm-none-linux-gnueabi- ARCH=arm distclean
  3. Choose build configuration corresponding to the target platform
    • For OMAP3EVM:
      $ make CROSS_COMPILE=arm-none-linux-gnueabi- ARCH=arm omap3_evm_defconfig
    • For AM3517EVM:
      $ make CROSS_COMPILE=arm-none-linux-gnueabi- ARCH=arm am3517_evm_defconfig
    • For Beagle/ BeagleXM:
      $ make CROSS_COMPILE=arm-none-linux-gnueabi- ARCH=arm omap3_beagle_defconfig
  4. Initiate the build
    $ make CROSS_COMPILE=arm-none-linux-gnueabi- ARCH=arm
    On successful completion, file uImage will be created in the sub-directory arch/arm/boot. Copy this file to the root directory of your TFTP server.

    I don't believe uImage is a default target. It doesn't build for me and isn't listed as a default target in "make help".

  • 0
    Guru 26430 points

    The target "uImage" should in "arch/arm/boot/Makefile". It depends on the utility "mkimage" existing. I think it silently fails if it cannot find "mkimage". Maybe you try "which mkimage" to see if there is one in your path.

  • 0 in reply to Norman Wong
    Intellectual 770 points

    Hi Norman,

    I think it's just that it isn't selected as a default target. "make help" does not list it as "* uImage".

    If I "make uImage" it builds the image just fine.

    Best,

    Ken

  • 0 in reply to Ken Koller
    Guru 26430 points

    I misunderstood. The instructions should have said.

    4. Initiate the build
      $ make CROSS_COMPILE=arm-none-linux-gnueabi- ARCH=arm uImage
      On successful completion, file uImage will be created in the sub-directory arch/arm/boot. Copy this file to the root directory of your TFTP server.

    The uImage target is an add-on just for embedded systems with u-boot. Maybe the mainline Linux guys don't want to force everybody to build uImage. The TI patched kernel partly does. I don't know if there are any TI platforms that don't use u-boot. In the far off past, I think uImage had manually built outside the kernel make.

     

  • 0 in reply to Norman Wong
    TI__Expert 4590 points

    Thanks for the feedback. You should see the User Guide updated soon.