Arm64 Ampere support

Ampere is a Arm64 CPU manufacturer, focusing on hyper converged cloud infrastructure. There are 2 main CPUs publically available:

• eMAG supplied in Lenovo HR330A & 350A servers (32 core, 3.0GHz)
• Altra CPU currently only available via cloud vendors

These servers are based on the Ampere eMAG chipset. The initial bring-up work is complete, and they are well supported from 13.0-RELEASE onwards. A number of FreeBSD developers have these systems, and Ampere has generously contributed further servers to the FreeBSD Foundation, destined for build & development clusters.

• SR330
• SR350

FreeBSD has full support from 13.0-RELEASE and further improvements are in development. If you have questions, please ask on the freebsd-arm@ mailing list.

Install from USB as per normal. The installer should run without change via the platform's remote console, so long as you plug in both the management & the normal ethernet ports.

Use either mini memstick or any of the default images (i.e. not rock64, rasbpi etc).

- lots of stuff

- temperature / sensors - cpu frequency - fan control - ipmi ??

To boot to ZFS you will need to specify additional loader parameters:

# /boot/loader.conf
kern.geom.label.disk_ident.enable="0"
kern.geom.label.gptid.enable="0"

#storage bits
opensolaris_load="YES"
zfs_load="YES"
cryptodev_load="YES"
# use CAM device on intel NVMe driver
hw.nvme.use_nvd=0

# filesystems
xz_load="YES"
tmpfs_load="YES"

# network
linuxkpi_load="YES"
mlx5_load="YES"
mlx5en_load="YES"
mlxfw_load="YES"

# serial over ipmi
autoboot_delay="3"
beastie_disable="YES"
boot_multicons="YES"
boot_serial="YES"
console="efi"