From: Pierre Gondois <pierre.gond...@arm.com>
Add AmlCreatePsdNode() to the AmlLib 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>
---
.../Include/Library/AmlLib/AmlLib.h | 35 +++-
.../Common/AmlLib/CodeGen/AmlCodeGen.c | 188 +++++++++++++++++-
2 files changed, 221 insertions(+), 2 deletions(-)
diff --git a/DynamicTablesPkg/Include/Library/AmlLib/AmlLib.h
b/DynamicTablesPkg/Include/Library/AmlLib/AmlLib.h
index be78c00b6109..8145ab70fa69 100644
--- a/DynamicTablesPkg/Include/Library/AmlLib/AmlLib.h
+++ b/DynamicTablesPkg/Include/Library/AmlLib/AmlLib.h
@@ -1,7 +1,7 @@
/** @file
AML Lib.
- Copyright (c) 2019 - 2021, Arm Limited. All rights reserved.<BR>
+ Copyright (c) 2019 - 2023, Arm Limited. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
@@ -1628,4 +1628,37 @@ AmlAddNameStringToNamedPackage (
IN AML_OBJECT_NODE_HANDLE NamedNode
);
+/** Create a _PSD node.
+
+ Creates and optionally adds the following node
+ Name(_PSD, Package()
+ {
+ NumEntries, // Integer
+ Revision, // Integer
+ Domain, // Integer
+ CoordType, // Integer
+ NumProc, // Integer
+ })
+
+ Cf. ACPI 6.4, s8.4.6.5 _PSD (P-State Dependency)
+
+ @ingroup CodeGenApis
+
+ @param [in] PsdInfo PsdInfo object
+ @param [in] ParentNode If provided, set ParentNode as the parent
+ of the node created.
+ @param [out] NewPsdNode If success and provided, contains the created node.
+
+ @retval EFI_SUCCESS The function completed successfully.
+ @retval EFI_INVALID_PARAMETER Invalid parameter.
+ @retval EFI_OUT_OF_RESOURCES Failed to allocate memory.
+**/
+EFI_STATUS
+EFIAPI
+AmlCreatePsdNode (
+ IN AML_PSD_INFO *PsdInfo,
+ IN AML_NODE_HANDLE ParentNode OPTIONAL,
+ OUT AML_OBJECT_NODE_HANDLE *NewPsdNode OPTIONAL
+ );
+
#endif // AML_LIB_H_
diff --git a/DynamicTablesPkg/Library/Common/AmlLib/CodeGen/AmlCodeGen.c
b/DynamicTablesPkg/Library/Common/AmlLib/CodeGen/AmlCodeGen.c
index f63d9fee8c11..f350083b148c 100644
--- a/DynamicTablesPkg/Library/Common/AmlLib/CodeGen/AmlCodeGen.c
+++ b/DynamicTablesPkg/Library/Common/AmlLib/CodeGen/AmlCodeGen.c
@@ -1,7 +1,7 @@
/** @file
AML Code Generation.
- Copyright (c) 2020 - 2022, Arm Limited. All rights reserved.<BR>
+ Copyright (c) 2020 - 2023, Arm Limited. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
@@ -3849,3 +3849,189 @@ exit_handler:
return Status;
}
+
+/** Create a _PSD node.
+
+ Creates and optionally adds the following node
+ Name(_PSD, Package()
+ {
+ NumEntries, // Integer
+ Revision, // Integer
+ Domain, // Integer
+ CoordType, // Integer
+ NumProc, // Integer
+ })
+
+ Cf. ACPI 6.4, s8.4.6.5 _PSD (P-State Dependency)
+
+ @ingroup CodeGenApis
+
+ @param [in] PsdInfo PsdInfo object
+ @param [in] ParentNode If provided, set ParentNode as the parent
+ of the node created.
+ @param [out] NewPsdNode If success and provided, contains the created node.
+
+ @retval EFI_SUCCESS The function completed successfully.
+ @retval EFI_INVALID_PARAMETER Invalid parameter.
+ @retval EFI_OUT_OF_RESOURCES Failed to allocate memory.
+**/
+EFI_STATUS
+EFIAPI
+AmlCreatePsdNode (
+ IN AML_PSD_INFO *PsdInfo,
+ IN AML_NODE_HANDLE ParentNode OPTIONAL,
+ OUT AML_OBJECT_NODE_HANDLE *NewPsdNode OPTIONAL
+ )
+{
+ EFI_STATUS Status;
+ AML_OBJECT_NODE_HANDLE PsdNode;
+ AML_OBJECT_NODE_HANDLE PsdPackage;
+ AML_OBJECT_NODE_HANDLE IntegerNode;
+ UINT32 NumberOfEntries;
+
+ if ((PsdInfo == NULL) ||
+ ((ParentNode == NULL) && (NewPsdNode == NULL)))
+ {
+ Status = EFI_INVALID_PARAMETER;
+ ASSERT_EFI_ERROR (Status);
+ return Status;
+ }
+
+ // Revision 3 per ACPI 6.4 specification
+ if (PsdInfo->Revision == EFI_ACPI_6_4_AML_PSD_REVISION_V0) {
+ // NumEntries 5 per ACPI 6.4 specification
+ NumberOfEntries = 5;
+ } else {
+ Status = EFI_INVALID_PARAMETER;
+ ASSERT_EFI_ERROR (Status);
+ return Status;
+ }
+
+ if (((PsdInfo->CoordType != EFI_ACPI_6_4_AML_STATE_COORD_TYPE_SW_ALL) &&
+ (PsdInfo->CoordType != EFI_ACPI_6_4_AML_STATE_COORD_TYPE_SW_ANY) &&
+ (PsdInfo->CoordType != EFI_ACPI_6_4_AML_STATE_COORD_TYPE_HW_ALL)) ||
+ (PsdInfo->NumProc == 0))
+ {
+ Status = EFI_INVALID_PARAMETER;
+ ASSERT_EFI_ERROR (Status);
+ return Status;
+ }
+
+ Status = AmlCodeGenNamePackage ("_PSD", NULL, &PsdNode);
+ if (EFI_ERROR (Status)) {
+ ASSERT_EFI_ERROR (Status);
+ return Status;
+ }
+
+ // Get the Package object node of the _PSD node,
+ // which is the 2nd fixed argument (i.e. index 1).
+ PsdPackage = (AML_OBJECT_NODE_HANDLE)AmlGetFixedArgument (
+ PsdNode,
+ EAmlParseIndexTerm1
+ );
+ if ((PsdPackage == NULL) ||
+ (AmlGetNodeType ((AML_NODE_HANDLE)PsdPackage) != EAmlNodeObject) ||
+ (!AmlNodeHasOpCode (PsdPackage, AML_PACKAGE_OP, 0)))
+ {
+ Status = EFI_INVALID_PARAMETER;
+ ASSERT_EFI_ERROR (Status);
+ goto error_handler;
+ }
+
+ // NumEntries
+ Status = AmlCodeGenInteger (NumberOfEntries, &IntegerNode);
+ if (EFI_ERROR (Status)) {
+ ASSERT_EFI_ERROR (Status);
+ return Status;
+ }
+
+ Status = AmlVarListAddTail (
+ (AML_NODE_HANDLE)PsdPackage,
+ (AML_NODE_HANDLE)IntegerNode
+ );
+ if (EFI_ERROR (Status)) {
+ ASSERT_EFI_ERROR (Status);
+ FreePool (IntegerNode);
+ return Status;
+ }
+
+ // Revision
+ Status = AmlCodeGenInteger (PsdInfo->Revision, &IntegerNode);
+ if (EFI_ERROR (Status)) {
+ ASSERT_EFI_ERROR (Status);
+ return Status;
+ }
+
+ Status = AmlVarListAddTail (
+ (AML_NODE_HANDLE)PsdPackage,
+ (AML_NODE_HANDLE)IntegerNode
+ );
+ if (EFI_ERROR (Status)) {
+ ASSERT_EFI_ERROR (Status);
+ FreePool (IntegerNode);
+ return Status;
+ }
+
+ // Domain
+ Status = AmlCodeGenInteger (PsdInfo->Domain, &IntegerNode);
+ if (EFI_ERROR (Status)) {
+ ASSERT_EFI_ERROR (Status);
+ return Status;
+ }
+
+ Status = AmlVarListAddTail (
+ (AML_NODE_HANDLE)PsdPackage,
+ (AML_NODE_HANDLE)IntegerNode
+ );
+ if (EFI_ERROR (Status)) {
+ ASSERT_EFI_ERROR (Status);
+ FreePool (IntegerNode);
+ return Status;
+ }
+
+ // CoordType
+ Status = AmlCodeGenInteger (PsdInfo->CoordType, &IntegerNode);
+ if (EFI_ERROR (Status)) {
+ ASSERT_EFI_ERROR (Status);
+ return Status;
+ }
+
+ Status = AmlVarListAddTail (
+ (AML_NODE_HANDLE)PsdPackage,
+ (AML_NODE_HANDLE)IntegerNode
+ );
+ if (EFI_ERROR (Status)) {
+ ASSERT_EFI_ERROR (Status);
+ FreePool (IntegerNode);
+ return Status;
+ }
+
+ // Num Processors
+ Status = AmlCodeGenInteger (PsdInfo->NumProc, &IntegerNode);
+ if (EFI_ERROR (Status)) {
+ ASSERT_EFI_ERROR (Status);
+ return Status;
+ }
+
+ Status = AmlVarListAddTail (
+ (AML_NODE_HANDLE)PsdPackage,
+ (AML_NODE_HANDLE)IntegerNode
+ );
+ if (EFI_ERROR (Status)) {
+ ASSERT_EFI_ERROR (Status);
+ FreePool (IntegerNode);
+ return Status;
+ }
+
+ Status = LinkNode (PsdNode, ParentNode, NewPsdNode);
+ if (EFI_ERROR (Status)) {
+ ASSERT_EFI_ERROR (Status);
+ goto error_handler;
+ }
+
+ return Status;
+
+error_handler:
+ AmlDeleteTree ((AML_NODE_HANDLE)PsdNode);
+ return Status;
+}
--
2.25.1
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