feat(fvp): allow configurable FVP Trusted SRAM size
In some build configurations TF-A can exceed the existing 256KB SRAM,
triggering a build failure. More recent versions of the base FVP allow
you to configure a larger Trusted SRAM of 512KB.
This change introduces the `FVP_TRUSTED_SRAM_SIZE` build option, which
allows you to explicitly specify how much of the Trusted SRAM to
utilise, e.g.:
FVP_TRUSTED_SRAM_SIZE=384
This allows previously-failing configurations to build successfully by
utilising more than the originally-allocated 256KB of the Trusted SRAM
while maintaining compatibility with older configurations/models that
only require/have 256KB.
Change-Id: I8344d3718564cd2bd53f1e6860e2fe341ae240b0
Signed-off-by: Chris Kay <chris.kay@arm.com>
diff --git a/docs/plat/arm/arm-build-options.rst b/docs/plat/arm/arm-build-options.rst
index e7e7ee7..6c782cf 100644
--- a/docs/plat/arm/arm-build-options.rst
+++ b/docs/plat/arm/arm-build-options.rst
@@ -169,6 +169,12 @@
require all the CPUs to execute the CPU specific power down sequence to
complete a warm reboot sequence in which only the CPUs are power cycled.
+Arm FVP Build Options
+---------------------
+
+- ``FVP_TRUSTED_SRAM_SIZE``: Size (in kilobytes) of the Trusted SRAM region to
+ utilize when building for the FVP platform. This option defaults to 256.
+
--------------
.. |FIP in a GPT image| image:: ../../resources/diagrams/FIP_in_a_GPT_image.png