[lkml]   [2012]   [Mar]   [7]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
    SubjectRe: [PATCH 2/3] Kbuild: Implement CONFIG_UIMAGE_KERNEL_NOLOAD
    On 03/07/2012 11:08 AM, Jean-Christophe PLAGNIOL-VILLARD wrote:
    > On 17:30 Tue 06 Mar , Stephen Warren wrote:
    >> This allows the user to use U-Boot's mkimage's -T kernel_noload option
    >> if their arch Kconfig allows it, and they desire.
    >> Signed-off-by: Stephen Warren <>
    >> ---
    >> The next patch enables this new CONFIG_ALLOW_ option for ARM. I assume
    >> that some other architectures will also be able to enable it, but I'm
    >> not familiar enough with any to know which.
    > I'm going to repeat. I don't think any impromevent here.
    > with no specific kernel load address the uImage for is useless/

    No, the whole point of this type of kernel image is that it doesn't need
    a specific load address; the kernel zImage can run from anywhere in RAM
    (provided AUTO_ZRELADDR is enabled, subject to some slight
    restrictions), and hence the uImage doesn't need to be loaded to or
    moved to any particular location.

    The scripts that U-Boot runs determine where the image gets loaded into

    > And this no the job of the kernel to build a boot loader specific boot image
    > format.

    Not everyone agrees with this.

    > And the uImage format here is called the legacy format where now U-Boot
    > support a new format based on DT format.
    > Will you plan to add it too?

    No. The last time I heard anyone talk about that, it sounded like the
    adoption was basically zero, so it seems pointless. Personally, I find
    creating that kind of image more complex, and don't see any benefits in
    that format either.

    > no sorry I don't think it's the right way to go.
    > On X86 we boot zImage simply. The new uImage option to do not specify the load
    > address add nothing more than just boot a zImage for kernel point of view.

    U-Boot does not currently have the ability to boot zImage on ARM.

    > Further more on server the vendor will use grub mostly (even on ARM) and will
    > expect to boot a zImage.

    But that is irrelevant for the people who are using U-Boot not grub.

     \ /
      Last update: 2012-03-07 19:43    [W:0.021 / U:3.020 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site