Bootloader source code

[rva3]

Hello,

I'm currently debugging Linux kernel on the GX6605s, but the proprietary nature of the bootloader is a significant blocker. Running strings on loader-sflash.bin shows that it's a clearly modified U-Boot, i.e.:
EHCI failed to shut down host controller. - https://github.com/u-boot/u-boot/blob/56cac250b0839ddbad1311d3ca4231f532b5aadf/drivers/usb/host/ehci-hcd.c#L235
EHCI failed: timeout when disabling periodic list - https://github.com/u-boot/u-boot/blob/56cac250b0839ddbad1311d3ca4231f532b5aadf/drivers/usb/host/ehci-hcd.c#L1277
No valid FAT fs found - https://github.com/u-boot/u-boot/blob/56cac250b0839ddbad1311d3ca4231f532b5aadf/fs/fat/fat.c#L1220
Hit any key to stop autoboot - https://github.com/u-boot/u-boot/blob/56cac250b0839ddbad1311d3ca4231f532b5aadf/common/autoboot.c#L384
U-Boot, uImage, board/gx6605s/gx6605s_api.c (U-Boot-like structure) etc.

As U-Boot is licensed under the GNU General Public License v2.0, the source code for these modifications must be made available. Could you please provide a link to the source code for the U-Boot fork used for the GX6605s, or point me to the relevant repository?

Best regards