[PATCH] user: Document arm/realview-pbx-a9 BSP

[Sebastian Huber]

---
 user/bsps/arm/realview-pbx-a9.rst | 16 ++++++++++++++--
 1 file changed, 14 insertions(+), 2 deletions(-)

diff --git a/user/bsps/arm/realview-pbx-a9.rst b/user/bsps/arm/realview-pbx-a9.rst
index 96710a0..15d1fbf 100644
--- a/user/bsps/arm/realview-pbx-a9.rst
+++ b/user/bsps/arm/realview-pbx-a9.rst
@@ -1,8 +1,20 @@
 .. SPDX-License-Identifier: CC-BY-SA-4.0
 
-.. Copyright (C) 2019 TBD
+.. Copyright (C) 2020 embedded brains GmbH (http://www.embedded-brains.de)
 
 realview-pbx-a9
 ===============
 
-TODO.
+The ``arm/realview_pbx_a9_qemu`` BSP is intended to be used with Qemu.  The
+Qemu ``realview-pbx-a9`` machine can be used to run SMP tests using for example
+the Qemu ``-smp 4`` command line option.
+
+The command line to execute an ELF file :file:`app.exe` on this Qemu machine
+is:
+
+.. code-block:: none
+
+    export QEMU_AUDIO_DRV="none"
+    qemu-system-arm -net none -nographic -M realview-pbx-a9 -m 256M -kernel app.exe
+
+You do not need to specify a device tree blob.
-- 
2.26.2