[U-Boot] U-boot support for FIT image with 64 bit Linux Kernel

[Simon Glass]

+Bin

Hi,

On 23 June 2016 at 08:45, vinoth eswaran <evinoth1206 at gmail.com> wrote:
> Hello,
>
> I am working on an embedded project with the u-boot and Minnowboard
> max. With compressed kernel (bzImage) everything works fine, I want to
> check the performance with
> uncompressed kernel (vmlinux).
>
> So for creating the image.fit file I followed the instructions as per
> the file x86-fit-boot.txt except that I have changed the compression
> to none in the image.its file since I want to check the uncompressed
> Kernel
>
>             data = /incbin/("./vmlinux.bin");
>             type = "kernel";
>             arch = "x86";
>             os = "linux";
>             compression = "none";

Do you have a load address?

>
> The bootcmd is "bootcmd=fatload mmc 1:1 0x02000000 image.fit ; bootm
> 0x02000000". Now I am seeing that the
> start up hangs after printing the commands starting kernel ... and the
> time summary. Do you have any idea why it is happening?
>
> reading imagefit
> 14566018 bytes read in 317 ms (43.8 MiB/s)
> ## Loading kernel from FIT Image at 02000000 ...
>    Using 'config at 1' configuration
>    Verifying Hash Integrity ... OK
>    Trying 'kernel at 1' kernel subimage
>      Description:  Vanilla Linux kernel
>      Created:      2016-06-23  14:22:21 UTC
>      Type:         Kernel Image
>      Compression:  uncompressed
>      Data Start:   0x020000e8
>      Data Size:    14548992 Bytes = 13.9 MiB
>      Architecture: Intel x86
>      OS:           Linux
>      Load Address: 0x01000000
>      Entry Point:  0x00000000
>      Hash algo:    sha1
>      Hash value:   5a0bddcbf1f54ac989fff662fc43fb5fc801ebbc
>    Verifying Hash Integrity ... sha1+ OK
> ## Loading setup from FIT Image at 02000000 ...
>    Using 'config at 1' configuration
>    Trying 'setup at 1' setup subimage
>      Description:  Linux setup.bin
>      Created:      2016-06-23  14:22:21 UTC
>      Type:         x86 setup.bin
>      Compression:  uncompressed
>      Data Start:   0x02de01d0
>      Data Size:    15708 Bytes = 15.3 KiB
>      Hash algo:    sha1
>      Hash value:   08ffa163d054b9b0f5b11d4b3db2a16247cee395
>    Verifying Hash Integrity ... sha1+ OK
>    Loading setup from 0x02de01d0 to 0x00090000
>    Loading Kernel Image ... OK
> Setup at 0x090000
> Magic signature found
> Kernel command line: "quiet"
>
> Starting kernel ...
>
>
> I have seen in the document that it doesn't support for 64 bit kernel
> and the document link given is now not accessible.
> http://wiki.osdev.org/64-bit_Higher_Half_Kernel_with_GRUB_2

Actually this comment is incorrect:

"Note: these instructions assume a 32-bit kernel. U-Boot does not currently
support booting a 64-bit kernel as it has no way of going into 64-bit mode on
x86."

U-Boot supports this. But you need to use x86_64 as the image type
instead of x86.

Are you booting with a 32- or 64-bit kernel?

Perhaps try without the 'qiuet'?


>
> Mit Freundlichen Grüßen
> VinothKumar
> +49 1798909072

Regards,
Simon