Running u-boot standalone hello_world on an image partition with qemu

[Simon Glass]

Hi Lists,

On Thu, 3 Nov 2022 at 05:11, Lists Nick Betteridge
<lists.nick.betteridge at gmail.com> wrote:
>
> I'm developing on an ubuntu x86 machine, trying to run the u-boot
> hello_world standalone application which resides on an image |sd.img|
> which contains a partition
>
> I've compiled u-boot (|v2022.10|) with |qemu-x86_64_defconfig|
>
> I run qemu with "|qemu-system-x86_64 -m 1024 -nographic -bios u-boot.rom
> -drive format=raw,file=sd.img"|
>
> u-boot starts up, doesn't find a script, doesn't detect tftp, and awaits
> a command. If I type |"ext4ls ide 0:1|", I can clearly see
> hello_world.bin (|3932704 hello_world.bin|).
>
> When I do a |ext4load ide 0:1 0x40000 hello_world.bin| (in preparation
> for |go 40000 This is another test|), qemu/u-boot restarts.
>
> 0x40000 is the |CONFIG_STANDALONE_LOAD_ADDR| for x86.
>
> I have also tried making an image of hello_world |"mkimage -n "Hello
> stand alone" -A x86_64 -O u-boot -T standalone -C none -a 0x40000 -d
> hello_world.bin -v hello_world.img|" and tried to load the image into
> 0x40000 with the intention of using |bootm| in case of cache issues -
> qemu/u-boot still resets.
>
> Could anyone possibly point out the basic mistake I'm making?

Is the app linked to start at that address. Could you try 'dcache off'
before the 'go'? Do you have a debugger?

Regards,
Simon