docs(versal): update SMC convention
Updated documentation for SMC SiP calling conventions for IPI,
PM, and SiP Service queries.
Signed-off-by: Prasad Kummari <prasad.kummari@amd.com>
Change-Id: Ic232551bb09152124da5226673c88e1a34a384c4
diff --git a/docs/plat/xilinx-versal.rst b/docs/plat/xilinx-versal.rst
index aa094f7..072329a 100644
--- a/docs/plat/xilinx-versal.rst
+++ b/docs/plat/xilinx-versal.rst
@@ -76,3 +76,46 @@
data structure is passed in the ```PMC_GLOBAL_GLOB_GEN_STORAGE4``` register.
The register is free to be used by other software once the TF-A is bringing up
further firmware images.
+
+Reference DEN0028E SMC calling convention
+------------------------------------------
+
+Allocated subranges of Function Identifier to SIP services
+----------------------------------------------------------
+
++-----------------------+-------------------------------------------------------+
+| SMC Function | Identifier Service type |
++-----------------------+-------------------------------------------------------+
+| 0xC2000000-0xC200FFFF | Fast SMC64 SiP Service Calls as per SMCCC Section 6.1 |
++-----------------------+-------------------------------------------------------+
+
+IPI SMC call ranges
+-------------------
+
++---------------------------+-----------------------------------------------------------+
+| SMC Function Identifier | Service type |
++---------------------------+-----------------------------------------------------------+
+| 0xc2001000-0xc2001FFF | Fast SMC64 SiP Service call range used for AMD-Xilinx IPI |
++---------------------------+-----------------------------------------------------------+
+
+PM SMC call ranges
+------------------
+
++---------------------------+---------------------------------------------------------------------------+
+| SMC Function Identifier | Service type |
++---------------------------+---------------------------------------------------------------------------+
+| 0xc2000000-0xc2000FFF | Fast SMC64 SiP Service call range used for AMD-Xilinx Platform Management |
++---------------------------+---------------------------------------------------------------------------+
+
+SMC function IDs for SiP Service queries
+----------------------------------------
+
++--------------+--------------+--------------+
+| Service | Call UID | Revision |
++--------------+--------------+--------------+
+| SiP Service | 0x8200_FF01 | 0x8200_FF03 |
++--------------+--------------+--------------+
+
+Call UID Query – Returns a unique identifier of the service provider.
+
+Revision Query – Returns revision details of the service implementor.