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

[Simon Glass]

Hi,

On 27 June 2016 at 00:07, vinoth eswaran <evinoth1206 at gmail.com> wrote:
> On Sun, Jun 26, 2016 at 4:53 AM, Simon Glass <sjg at chromium.org> wrote:
>>
>> +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'?
>>
>
> Thanks for reply, your information helped me. But I would like to
> request to sort this message when using x86_64 as architecture type in
> the mkimage. The following debug message when creating the FIT image
> guided me in the wrong path for the past few days, as I thought x86_64
> is not supported and I need to use x86. With arch=x86_64 while
> creating FIT/uImage,
>
>    Invalid CPU Type - valid names are: alpha, arm, x86, ia64, m68k,
> microblaze, mips, mips64, nios2, powerpc, ppc, s390, sh, sparc,
> sparc64, blackfin, avr32
>   Architecture: Unknown Architecture
>
> Also the image type used for setup.bin. With image type= x86_setup
>
>     Invalid Image Type - valid names are: filesystem, firmware,
> flat_dt, imximage, kernel, kwbimage, multi, omapimage, ramdisk,
> script, standalone, flat_dt, kwbimage, imximage, ublimage
>
> Many Thanks:)
>
> Now with x86_64 as arch type I could run the system again. I should
> have ignored the message and tested initially, but also confusions
> with Load and entry addresses let me to stay blank.

I've found various infidelities with mkimage errors - I'll send a
series to improve things.

Regards,
Simon