Add Neoverse N1 support

[stevefan1999-personal]

Although it's a niche use case, I'd like to try this out on an AWS Graviton2 server out of bravery. Both tune and cpu supports neoverse-n1 target since GCC 9 and it shouldn't take more than 10 lines in the make file.

Also, Oracle's Ampere A1 servers also runs Neoverse N1 based CPU, and they offered free 4C24G server for that.

[ptitSeb]

I'm not sure those architecture actualy support Aarch32, and that is needed for box86.

[ptitSeb]

ah, it seems it does. You can try to build using "Phytium" at first. Adding a specific build can come later (it's an arm8.2 I think, right?)

[stevefan1999-personal]

I'm not sure those architecture actualy support Aarch32, and that is needed for box86.

In fact it still retained 32-bit support. Neoverse N1 is a cousin of Cortex-A76.

[stevefan1999-personal]

ah, it seems it does. You can try to build using "Phytium" at first. Adding a specific build can come later (it's an arm8.2 I think, right?)

I'm trying the Snapdragon target, building on qemu is quite slow tho, I can't seem to cross compile for some reason

[000yesnt]

Builds and works fine for me, using -DRPI4ARM64=1 on Oracle Cloud

[ptitSeb]

Can this ticket be closed now?