====== Arm64 Ampere support ======

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===== FreeBSD/ARM64 on the Ampere processor family =====

===== What is Ampere? =====

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

==== eMAG cpu in Lenovo HR330A / HR350A ====

These servers are based on the [[https://amperecomputing.com/product/|Ampere]] [[https://amperecomputing.com/wp-content/uploads/2019/01/eMAG8180_PB_v0.5_20180914.pdf|eMAG chipset]]. The
[[https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=237055|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.

  * [[https://amperecomputing.com/wp-content/uploads/2019/04/Lenovo_ThinkSystem_HR330A_PB_20190409.pdf|SR330]]
  * [[https://amperecomputing.com/wp-content/uploads/2019/04/Lenovo_ThinkSystem_HR350A_20190409.pdf|SR350]]

===== Ampere and FreeBSD =====

%%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.

===== How to Boot =====

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.

==== Pre-Built Images ====

Use either [[https://download.freebsd.org/ftp/releases/arm64/aarch64/ISO-IMAGES/13.0/FreeBSD-13.0-RELEASE-arm64-aarch64-mini-memstick.img.xz|mini memstick]]
or any of the [[https://download.freebsd.org/ftp/releases/arm64/aarch64/ISO-IMAGES/13.0/|default images]] (i.e. not rock64, rasbpi etc).

===== Features =====

==== What works ====

- lots of stuff

==== What doesn't ====

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

===== Known Issues/hints =====

==== eMAG ====

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

<code>
# /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"
</code>

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{{tag>HowTo HowTo}}