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docs(versal): update SMC convention

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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
This commit is contained in:
Prasad Kummari 2024-02-08 17:29:57 +05:30
parent 93163d988e
commit d8dc1cfa6f
1 changed files with 43 additions and 0 deletions
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docs/plat/xilinx-versal.rst
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@ -76,3 +76,46 @@ uses that data to hand off to the loaded images. The address of the handoff
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.