| Arm Server Base System Architecture Reference board (``sbsa-ref``) |
| ================================================================== |
| |
| While the ``virt`` board is a generic board platform that doesn't match |
| any real hardware the ``sbsa-ref`` board intends to look like real |
| hardware. The `Server Base System Architecture |
| <https://developer.arm.com/documentation/den0029/latest>`_ defines a |
| minimum base line of hardware support and importantly how the firmware |
| reports that to any operating system. It is a static system that |
| reports a very minimal DT to the firmware for non-discoverable |
| information about components affected by the qemu command line (i.e. |
| cpus and memory). As a result it must have a firmware specifically |
| built to expect a certain hardware layout (as you would in a real |
| machine). |
| |
| It is intended to be a machine for developing firmware and testing |
| standards compliance with operating systems. |
| |
| Supported devices |
| """"""""""""""""" |
| |
| The sbsa-ref board supports: |
| |
| - A configurable number of AArch64 CPUs |
| - GIC version 3 |
| - System bus AHCI controller |
| - System bus EHCI controller |
| - CDROM and hard disc on AHCI bus |
| - E1000E ethernet card on PCIe bus |
| - Bochs display adapter on PCIe bus |
| - A generic SBSA watchdog device |
| |
