DynamicTablesPkg: SSDT CPU topology and LPI state generator

In the GIC interrupt model, logical processors are required to
have a Processor Device object in the DSDT and must convey each
processor's GIC information to the OS using the GICC structure.
Additionally, _LPI objects may be needed as they provide a method
to describe Low Power Idle states that defines the local power
states for each node in a hierarchical processor topology.

Therefore, add support to generate the CPU topology and the LPI
state information in an SSDT table.

Reviewed-by: Sami Mujawar <sami.mujawar@arm.com>
Signed-off-by: Pierre Gondois <Pierre.Gondois@arm.com>

1 files changed, 6 insertions, 1 deletions

diff --git a/DynamicTablesPkg/Include/AcpiTableGenerator.h b/DynamicTablesPkg/Include/AcpiTableGenerator.h
index 352331d6dc..45c808ba74 100644
--- a/DynamicTablesPkg/Include/AcpiTableGenerator.h
+++ b/DynamicTablesPkg/Include/AcpiTableGenerator.h
@@ -1,6 +1,6 @@
 /** @file

 

-  Copyright (c) 2017 - 2020, Arm Limited. All rights reserved.<BR>

+  Copyright (c) 2017 - 2021, Arm Limited. All rights reserved.<BR>

 

   SPDX-License-Identifier: BSD-2-Clause-Patent

 

@@ -63,6 +63,10 @@ The Dynamic Tables Framework implements the following ACPI table generators:
             The SSDT CMN-600 generator collates the CMN-600 information

             from the Configuration Manager and patches the SSDT CMN-600

             template to build the SSDT CMN-600 table.

+  - SSDT Cpu-Topology:

+            The SSDT Cpu-Topology generator collates the cpu and LPI

+            information from the Configuration Manager and generates a

+            SSDT table describing the CPU hierarchy.

 */

 

 /** The ACPI_TABLE_GENERATOR_ID type describes ACPI table generator ID.

@@ -88,6 +92,7 @@ typedef enum StdAcpiTableId {
   EStdAcpiTableIdSrat,                          ///< SRAT Generator

   EStdAcpiTableIdSsdtSerialPort,                ///< SSDT Serial-Port Generator

   EStdAcpiTableIdSsdtCmn600,                    ///< SSDT Cmn-600 Generator

+  EStdAcpiTableIdSsdtCpuTopology,               ///< SSDT Cpu Topology

   EStdAcpiTableIdMax

 } ESTD_ACPI_TABLE_ID;