[U-Boot] Support of kernels > 16 MiB on Raspberry Pi

[Jaehoon Chung]

On 02/23/2018 04:58 AM, Alexander Kurtz wrote:
> Hi!
> 
> I am using U-Boot to boot Debian Buster arm64 (standard kernel with a
> dracut-based initramfs) via an extlinux.conf on my Raspberry Pi 3. 
> 
> Recently, the Debian kernel grew beyond 16 MiB:
> 
>     4.13: /boot/vmlinuz-4.13.0-1-arm64 == 16448000 bytes (< 16 MiB) [0]
>     4.14: /boot/vmlinuz-4.14.0-3-arm64 == 17539584 bytes (> 16 MiB) [1]
>     4.15: /boot/vmlinuz-4.15.0-1-arm64 == 17867264 bytes (> 16 MiB) [2]
> 
> https://github.com/u-boot/u-boot/blob/master/include/configs/rpi.h#L129 says:
> 
>     #define ENV_MEM_LAYOUT_SETTINGS \
>     "fdt_high=ffffffff\0" \
>     "initrd_high=ffffffff\0" \
>     "fdt_addr_r=0x00000100\0" \
>     "pxefile_addr_r=0x00100000\0" \
>     "kernel_addr_r=0x01000000\0" \
>     "scriptaddr=0x02000000\0" \
>     "ramdisk_addr_r=0x02100000\0" \
> 
> Am I correct in assuming that this default configuration will break
> with kernels > 16 MiB? The Readme [3] seems to confirm this, but I
> wanted to ask for explicit confirmation here.

Especially, this is occurred about arm64 kernel.
Because it wil be overlapped with other image address, if kernel image is over than 16MB.

In my case, i'm using the private boot.scr.img for booting script.
I had just added the kernel_addr_r=0x02d000000.

Just Refer to below:
https://review.tizen.org/git/?p=platform/kernel/u-boot.git;a=commit;h=8fdfbbeb8a4b2f8c8e66824709e48d9abdb23534

Best Regards,
Jaehoon Chung

> 
> The background is that ever since the upgrade to 4.14, the kernel has
> been failing to unpack the initramfs, complaining about "junk in [the]
> compressed archive" and I am currently trying to find where to best
> file a bug report about this!
> 
> Best regards
> 
> Alexander Kurtz
> 
> [0] http://snapshot.debian.org/package/linux/4.13.13-1/#linux-image-4.13.0-1-arm64_4.13.13-1
> [1] http://snapshot.debian.org/package/linux/4.14.17-1/#linux-image-4.14.0-3-arm64_4.14.17-1
> [2] http://snapshot.debian.org/package/linux/4.15.4-1/#linux-image-4.15.0-1-arm64_4.15.4-1
> [3] https://github.com/u-boot/u-boot/blob/master/doc/README.distro#L250
> 
> 
> 
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