@@ -6,16 +6,35 @@ 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).
+reports that to any operating system.
It is intended to be a machine for developing firmware and testing
standards compliance with operating systems.
+Platform versions
+"""""""""""""""""
+
+QEMU 7.1 brought support for "platform version major/minor" fields in
+DeviceTree.
+
+Version 0.0
+'''''''''''
+
+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).
+
+Version 0.1
+'''''''''''
+
+Additional data are provided in DT to the firmware:
+ - address and size of GIC Distributor
+ - address and size of GIC Redistributor
+
+Simple "/intc/reg" field is used.
+
Supported devices
"""""""""""""""""
We plan to start using sbsa-ref platform version fields in DT so firmware does not have to use hardcoded values. Signed-off-by: Marcin Juszkiewicz <marcin.juszkiewicz@linaro.org> --- docs/system/arm/sbsa.rst | 31 +++++++++++++++++++++++++------ 1 file changed, 25 insertions(+), 6 deletions(-)