I hope they're going to figure out AArch64 support for the Raspberry Pi soon, especially since they have launched the models with larger amounts of RAM. Having a true AArch64 Raspberry Pi would be really nice.
(I am not sure Dolphin-emu would run with considerable performance, but damn if I’m not curious.)
So basically, I should just cross compile RPi Linux and Mesa and it should work?
To be honest, I have been confused about the VideoCore driver situation from day 1, but I thought it was a blob.
1 TB RAM supported by 32-bit ARM is not enough? I don't think increasing process virtual address size is the most pressing need at this point. Although it would help with things like WebAssembly, and anything else that benefits from mapping a lot of stuff in the address space.
The myth that you need to have 64-bit to access more than 4 GB RAM seems to still be very strong, despite not being true for a long time on modern x86 (since Pentium Pro in 1995) and ARM platforms (since LPAE designs, like 2013 Cortex A7/A15, etc.).
Of course I'd also like to get AArch64 on RPi4, but for entirely different reasons. To support double precision NEON SIMD and to get more registers to help Cortex A72 core out-of-order engine to keep the execution units busy. More registers helps to reduce dependencies, giving OoO more freedom to rearrange instructions for optimal execution.
1) https://www.realworldtech.com/forum/?threadid=76912&curposti... 2) https://www.realworldtech.com/forum/?threadid=76912&curposti...
Anyways, Linus is being... Linus. He is of course right in some ways, from kernel point of view it does suck, when you can't map all of the caches and buffers simultaneously. But PAE is pretty good for a bunch of large processes.
root@pi:~# cat /etc/issue.net
Ubuntu 18.04.2 LTS
root@pi:~# uname -a
Linux pi 4.19.57-v8+ #2 SMP PREEMPT Tue Jul 9 20:31:37 UTC 2019 aarch64 aarch64 aarch64 GNU/Linux
root@pi:~# file /bin/ls
/bin/ls: ELF 64-bit LSB shared object, ARM aarch64, version 1 (SYSV), dynamically linked, interpreter /lib/ld-, for GNU/Linux 3.7.0, BuildID[sha1]=de05fcef79d88af9cf9a71ed38e73af0b179bfb2, stripped
Is there an SD image that works?
will provide a link once I manage to upload it somewhere
it's quite beefy, 2.5GB -- apologies for that. We should be able to craft a much smaller image based on the ubuntu server release. Apparently, something was off about mounting the root partition on the first boot, so we went with our original image.
What am I missing here?
C:\Windows\System32>ssh -l root 192.168.178.184 root@192.168.178.184's password: Permission denied, please try again. root@192.168.178.184's password: Permission denied, please try again. root@192.168.178.184's password: root@192.168.178.184: Permission denied (publickey,password).
The behaviour should be identical to installing on a RPi3 (user/pass ubuntu/ubuntu, ethernet networking setup correctly etc.)
You don't even have to run Linux at all. FreeBSD/aarch64 works great on a Pi3 (as a headless server at least, VC4 is not ported)