Make use of the newly added AmlCreatePsdNode() to generate
_PSD objects.
_PSD objects allow to describe 'performance control, P-state
or CPPC, logical processor dependency', Cf. ACPI 6.4,
s8.4.5.5 _PSD (P-State Dependency).
Signed-off-by: Pierre Gondois <pierre.gond...@arm.com>
---
.../SsdtCpuTopologyGenerator.c | 96 +++++++++++++++++++
1 file changed, 96 insertions(+)
diff --git
a/DynamicTablesPkg/Library/Acpi/Arm/AcpiSsdtCpuTopologyLibArm/SsdtCpuTopologyGenerator.c
b/DynamicTablesPkg/Library/Acpi/Arm/AcpiSsdtCpuTopologyLibArm/SsdtCpuTopologyGenerator.c
index 724f33c660a8..9e3efb49e630 100644
---
a/DynamicTablesPkg/Library/Acpi/Arm/AcpiSsdtCpuTopologyLibArm/SsdtCpuTopologyGenerator.c
+++
b/DynamicTablesPkg/Library/Acpi/Arm/AcpiSsdtCpuTopologyLibArm/SsdtCpuTopologyGenerator.c
@@ -42,6 +42,7 @@ Requirements:
- EArmObjCmRef (OPTIONAL)
- EArmObjLpiInfo (OPTIONAL)
- GetEArmObjEtInfo (OPTIONAL)
+ - EArmObjPsdInfo (OPTIONAL)
*/
/** This macro expands to a function that retrieves the GIC
@@ -103,6 +104,16 @@ GET_OBJECT_LIST (
CM_ARM_ET_INFO
);
+/**
+ This macro expands to a function that retrieves the PSD
+ information from the Configuration Manager.
+*/
+GET_OBJECT_LIST (
+ EObjNameSpaceArm,
+ EArmObjPsdInfo,
+ CM_ARM_PSD_INFO
+ );
+
/** Initialize the TokenTable.
One entry should be allocated for each CM_ARM_PROC_HIERARCHY_INFO
@@ -256,6 +267,75 @@ WriteAslName (
return EFI_SUCCESS;
}
+/** Create and add an _PSD Node to Cpu Node.
+
+ For instance, transform an AML node from:
+ Device (C002)
+ {
+ Name (_UID, 2)
+ Name (_HID, "ACPI0007")
+ }
+
+ To:
+ Device (C002)
+ {
+ Name (_UID, 2)
+ Name (_HID, "ACPI0007")
+ Name (_PSD, Package()
+ {
+ NumEntries, // Integer
+ Revision, // Integer
+ Domain, // Integer
+ CoordType, // Integer
+ NumProcessors, // Integer
+ })
+ }
+
+ @param [in] Generator The SSDT Cpu Topology generator.
+ @param [in] CfgMgrProtocol Pointer to the Configuration Manager
+ Protocol Interface.
+ @param [in] GicCInfo Pointer to the CM_ARM_GICC_INFO object
+ describing the Cpu.
+ @param [in] Node CPU Node to which the _CPC node is
+ attached.
+
+ @retval EFI_SUCCESS The function completed successfully.
+ @retval EFI_INVALID_PARAMETER Invalid parameter.
+ @retval EFI_OUT_OF_RESOURCES Failed to allocate memory.
+**/
+STATIC
+EFI_STATUS
+EFIAPI
+CreateAmlPsdNode (
+ IN ACPI_CPU_TOPOLOGY_GENERATOR *Generator,
+ IN CONST EDKII_CONFIGURATION_MANAGER_PROTOCOL *CONST CfgMgrProtocol,
+ IN CM_ARM_GICC_INFO *GicCInfo,
+ IN AML_OBJECT_NODE_HANDLE *Node
+ )
+{
+ EFI_STATUS Status;
+ CM_ARM_PSD_INFO *PsdInfo;
+
+ Status = GetEArmObjPsdInfo (
+ CfgMgrProtocol,
+ GicCInfo->PsdToken,
+ &PsdInfo,
+ NULL
+ );
+ if (EFI_ERROR (Status)) {
+ ASSERT_EFI_ERROR (Status);
+ return Status;
+ }
+
+ Status = AmlCreatePsdNode (
+ PsdInfo,
+ Node,
+ NULL
+ );
+ ASSERT_EFI_ERROR (Status);
+ return Status;
+}
+
/** Create and add an _CPC Node to Cpu Node.
For instance, transform an AML node from:
@@ -842,6 +922,14 @@ CreateAmlCpuFromProcHierarchy (
}
}
+ if (GicCInfo->PsdToken != CM_NULL_TOKEN) {
+ Status = CreateAmlPsdNode (Generator, CfgMgrProtocol, GicCInfo, CpuNode);
+ if (EFI_ERROR (Status)) {
+ ASSERT_EFI_ERROR (Status);
+ return Status;
+ }
+ }
+
// If a CPC info is associated with the
// GicCinfo, create an _CPC method returning them.
if (GicCInfo->CpcToken != CM_NULL_TOKEN) {
@@ -1299,6 +1387,14 @@ CreateTopologyFromGicC (
break;
}
+ if (GicCInfo->PsdToken != CM_NULL_TOKEN) {
+ Status = CreateAmlPsdNode (Generator, CfgMgrProtocol, GicCInfo, CpuNode);
+ if (EFI_ERROR (Status)) {
+ ASSERT_EFI_ERROR (Status);
+ return Status;
+ }
+ }
+
// If a CPC info is associated with the
// GicCinfo, create an _CPC method returning them.
if (GicCInfo[Index].CpcToken != CM_NULL_TOKEN) {
--
2.25.1
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