user: Document arm/fvp BSP

Close #4202.

user/bsps/arm/fvp.rst

@@ -0,0 +1,39 @@
+.. SPDX-License-Identifier: CC-BY-SA-4.0
+
+.. Copyright (C) 2022 embedded brains GmbH
+
+fvp (Fixed Virtual Platform)
+============================
+
+The BSP for the
+`Arm Fixed Virtual Platforms <https://developer.arm.com/Tools%20and%20Software/Fixed%20Virtual%20Platforms>`_
+offers one variant.  You need a license from Arm to run the simulator.  The
+`fvp_cortex_r52` variant supports a simulation of the Cortex-R52 processor.
+The BSP supports the SMP configuration.
+
+Run an Executable
+-----------------
+
+To run an executable on a single Cortex-R52 processor use:
+
+.. code-block:: none
+
+    FVP_BaseR_Cortex-R52x1 -C bp.vis.disable_visualisation=1 -a build/arm/fvp_cortex_r52/testsuites/samples/ticker.exe
+
+To run an executable on a four Cortex-R52 processors use:
+
+.. code-block:: none
+
+    FVP_BaseR_Cortex-R52x4 -C bp.vis.disable_visualisation=1 -a build/arm/fvp_cortex_r52/testsuites/samples/ticker.exe
+
+Clock Driver
+------------
+
+The clock driver uses the `ARMv7-AR Generic Timer`.
+
+Console Driver
+--------------
+
+The console driver uses the
+`semihosting <https://developer.arm.com/documentation/dui0471/g/Semihosting/Semihosting-operations?lang=en>`_
+``SYS_READC`` and ``SYS_WRITEC`` system calls.

user/bsps/bsps-arm.rst

@@ -14,6 +14,7 @@ arm (ARM)
   arm/csb336.rst
   arm/csb337.rst
   arm/edb7312.rst
+  arm/fvp.rst
   arm/gumstix.rst
   arm/imx.rst
   arm/imxrt.rst