bl2-el3: Add documentation for BL2 at EL3
Update firmware-design.rst, porting-guide.rst and user-guide.rst
with the information about BL2 at EL3. Firmware-design.rst is
also update to explain how to test this feauture with FVP.
Change-Id: I86d64bc64594e13eb041cea9cefa3f7f3fa745bd
Signed-off-by: Roberto Vargas <roberto.vargas@arm.com>
diff --git a/docs/user-guide.rst b/docs/user-guide.rst
index 13f0964..274faa8 100644
--- a/docs/user-guide.rst
+++ b/docs/user-guide.rst
@@ -245,6 +245,9 @@
BL2U image. In this case, the BL2U in the ARM Trusted Firmware will not
be built.
+- ``BL2_AT_EL3``: This is an optional build option that enables the use of
+ BL2 at EL3 execution level.
+
- ``BL31``: This is an optional build option which specifies the path to
BL31 image for the ``fip`` target. In this case, the BL31 in the ARM
Trusted Firmware will not be built.