From: Abner Chang <abner.ch...@amd.com>
Signed-off-by: Abner Chang <abner.ch...@amd.com>
Cc: Abdul Lateef Attar <abdat...@amd.com>
---
.../AMD/AmdPlatformPkg/AmdPlatformPkg.dec | 3 +
.../AMD/AmdPlatformPkg/AmdPlatformPkg.dsc | 69 ++++
.../DxeAcpiSdtParserLib.inf | 33 ++
.../Include/Library/AmdAcpiSdtParserLib.h | 118 ++++++
.../DxeAcpiSdtParserLib/DxeAcpiSdtParserLib.c | 382 ++++++++++++++++++
.../DxeAcpiSdtParserLib.uni | 12 +
6 files changed, 617 insertions(+)
create mode 100644
Platform/AMD/AmdPlatformPkg/Library/DxeAcpiSdtParserLib/DxeAcpiSdtParserLib.inf
create mode 100644
Platform/AMD/AmdPlatformPkg/Include/Library/AmdAcpiSdtParserLib.h
create mode 100644
Platform/AMD/AmdPlatformPkg/Library/DxeAcpiSdtParserLib/DxeAcpiSdtParserLib.c
create mode 100644
Platform/AMD/AmdPlatformPkg/Library/DxeAcpiSdtParserLib/DxeAcpiSdtParserLib.uni
diff --git a/Platform/AMD/AmdPlatformPkg/AmdPlatformPkg.dec
b/Platform/AMD/AmdPlatformPkg/AmdPlatformPkg.dec
index 1fe7f94dc7..9cc9ed1ceb 100644
--- a/Platform/AMD/AmdPlatformPkg/AmdPlatformPkg.dec
+++ b/Platform/AMD/AmdPlatformPkg/AmdPlatformPkg.dec
@@ -14,5 +14,8 @@
PACKAGE_GUID = 2CB1238B-18E2-4837-B714-9DAB2B30A3C2
PACKAGE_VERSION = 1.0
+[Includes]
+ Include
+
[Guids]
gAmdPlatformPkgTokenSpaceGuid = { 0x663DE733, 0x70E0, 0x4D37, { 0xBB,
0x30, 0x7D, 0x9E, 0xAF, 0x9B, 0xDA, 0xE9 }}
diff --git a/Platform/AMD/AmdPlatformPkg/AmdPlatformPkg.dsc
b/Platform/AMD/AmdPlatformPkg/AmdPlatformPkg.dsc
index d3368c87ee..a1c16d109d 100644
--- a/Platform/AMD/AmdPlatformPkg/AmdPlatformPkg.dsc
+++ b/Platform/AMD/AmdPlatformPkg/AmdPlatformPkg.dsc
@@ -20,3 +20,72 @@
[Packages]
AmdPlatformPkg/AmdPlatformPkg.dec
+
+!include MdePkg/MdeLibs.dsc.inc
+
+[LibraryClasses.Common]
+ BaseLib|MdePkg/Library/BaseLib/BaseLib.inf
+ IoLib|MdePkg/Library/BaseIoLibIntrinsic/BaseIoLibIntrinsic.inf
+
UefiDriverEntryPoint|MdePkg/Library/UefiDriverEntryPoint/UefiDriverEntryPoint.inf
+
UefiBootServicesTableLib|MdePkg/Library/UefiBootServicesTableLib/UefiBootServicesTableLib.inf
+
UefiRuntimeServicesTableLib|MdePkg/Library/UefiRuntimeServicesTableLib/UefiRuntimeServicesTableLib.inf
+ UefiRuntimeLib|MdePkg/Library/UefiRuntimeLib/UefiRuntimeLib.inf
+ PcdLib|MdePkg/Library/BasePcdLibNull/BasePcdLibNull.inf
+
DebugPrintErrorLevelLib|MdePkg/Library/BaseDebugPrintErrorLevelLib/BaseDebugPrintErrorLevelLib.inf
+
+ #
+ # Debug libraries
+ #
+
DebugPrintErrorLevelLib|MdePkg/Library/BaseDebugPrintErrorLevelLib/BaseDebugPrintErrorLevelLib.inf
+!if $(TARGET) == RELEASE
+ DebugLib|MdePkg/Library/BaseDebugLibNull/BaseDebugLibNull.inf
+!else
+ DebugLib|MdePkg/Library/BaseDebugLibSerialPort/BaseDebugLibSerialPort.inf
+!endif
+
+ BaseLib|MdePkg/Library/BaseLib/BaseLib.inf
+ PcdLib|MdePkg/Library/BasePcdLibNull/BasePcdLibNull.inf
+
SynchronizationLib|MdePkg/Library/BaseSynchronizationLib/BaseSynchronizationLib.inf
+ HobLib|MdePkg/Library/DxeHobLib/DxeHobLib.inf
+ DevicePathLib|MdePkg/Library/UefiDevicePathLib/UefiDevicePathLib.inf
+ BaseMemoryLib|MdePkg/Library/BaseMemoryLibRepStr/BaseMemoryLibRepStr.inf
+ PrintLib|MdePkg/Library/BasePrintLib/BasePrintLib.inf
+ SerialPortLib|MdePkg/Library/BaseSerialPortLibNull/BaseSerialPortLibNull.inf
+ UefiLib|MdePkg/Library/UefiLib/UefiLib.inf
+ HiiLib|MdeModulePkg/Library/UefiHiiLib/UefiHiiLib.inf
+
UefiHiiServicesLib|MdeModulePkg/Library/UefiHiiServicesLib/UefiHiiServicesLib.inf
+ DxeServicesLib|MdePkg/Library/DxeServicesLib/DxeServicesLib.inf
+
DxeServicesTableLib|MdePkg/Library/DxeServicesTableLib/DxeServicesTableLib.inf
+
UefiDriverEntryPoint|MdePkg/Library/UefiDriverEntryPoint/UefiDriverEntryPoint.inf
+
UefiBootServicesTableLib|MdePkg/Library/UefiBootServicesTableLib/UefiBootServicesTableLib.inf
+
UefiRuntimeServicesTableLib|MdePkg/Library/UefiRuntimeServicesTableLib/UefiRuntimeServicesTableLib.inf
+ UefiRuntimeLib|MdePkg/Library/UefiRuntimeLib/UefiRuntimeLib.inf
+
+ #
+ # CryptLib
+ #
+ IntrinsicLib|CryptoPkg/Library/IntrinsicLib/IntrinsicLib.inf
+ OpensslLib|CryptoPkg/Library/OpensslLib/OpensslLib.inf
+ BaseCryptLib|CryptoPkg/Library/BaseCryptLib/BaseCryptLib.inf
+ RngLib|MdePkg/Library/BaseRngLib/BaseRngLib.inf
+
+ #
+ # Secureboot library
+ #
+
SecureBootVariableLib|SecurityPkg/Library/SecureBootVariableLib/SecureBootVariableLib.inf
+
SecureBootVariableProvisionLib|SecurityPkg/Library/SecureBootVariableProvisionLib/SecureBootVariableProvisionLib.inf
+
PlatformPKProtectionLib|SecurityPkg/Library/PlatformPKProtectionLibVarPolicy/PlatformPKProtectionLibVarPolicy.inf
+
+ #
+ # Platform - Replace the modules in this section in platform DSC file.
+ #
+ TimerLib|MdePkg/Library/BaseTimerLibNullTemplate/BaseTimerLibNullTemplate.inf
+
+[LibraryClasses.common.DXE_CORE, LibraryClasses.common.DXE_SMM_DRIVER,
LibraryClasses.common.SMM_CORE, LibraryClasses.common.DXE_DRIVER,
LibraryClasses.common.DXE_RUNTIME_DRIVER, LibraryClasses.common.UEFI_DRIVER,
LibraryClasses.common.UEFI_APPLICATION]
+
MemoryAllocationLib|MdePkg/Library/UefiMemoryAllocationLib/UefiMemoryAllocationLib.inf
+
ReportStatusCodeLib|MdeModulePkg/Library/DxeReportStatusCodeLib/DxeReportStatusCodeLib.inf
+
AcpiSdtParserLib|AmdPlatformPkg/Library/DxeAcpiSdtParserLib/DxeAcpiSdtParserLib.inf
+
+[Components]
+ AmdPlatformPkg/Library/DxeAcpiSdtParserLib/DxeAcpiSdtParserLib.inf
+
diff --git
a/Platform/AMD/AmdPlatformPkg/Library/DxeAcpiSdtParserLib/DxeAcpiSdtParserLib.inf
b/Platform/AMD/AmdPlatformPkg/Library/DxeAcpiSdtParserLib/DxeAcpiSdtParserLib.inf
new file mode 100644
index 0000000000..e2336de053
--- /dev/null
+++
b/Platform/AMD/AmdPlatformPkg/Library/DxeAcpiSdtParserLib/DxeAcpiSdtParserLib.inf
@@ -0,0 +1,33 @@
+## @file
+# INF file of AMD ACPI SDT parser library
+#
+# Copyright (C) 2023 Advanced Micro Devices, Inc. All rights reserved.
+#
+# SPDX-License-Identifier: BSD-2-Clause-Patent
+##
+[Defines]
+ INF_VERSION = 0x00010005
+ BASE_NAME = DxeAcpiSdtParserLib
+ MODULE_UNI_FILE = DxeAcpiSdtParserLib.uni
+ FILE_GUID = CBA6011E-6C92-443C-9F7D-0A60BA629A16
+ MODULE_TYPE = DXE_DRIVER
+ VERSION_STRING = 1.0
+ LIBRARY_CLASS = AcpiSdtParserLib
+
+#
+# The following information is for reference only and not required by the
build tools.
+#
+# VALID_ARCHITECTURES = IA32 X64 IPF EBC
+#
+
+[Sources]
+ DxeAcpiSdtParserLib.c
+
+[Packages]
+ MdePkg/MdePkg.dec
+ MdeModulePkg/MdeModulePkg.dec
+
+[LibraryClasses]
+ BaseLib
+ BaseMemoryLib
+ DebugLib
diff --git a/Platform/AMD/AmdPlatformPkg/Include/Library/AmdAcpiSdtParserLib.h
b/Platform/AMD/AmdPlatformPkg/Include/Library/AmdAcpiSdtParserLib.h
new file mode 100644
index 0000000000..9b0079d556
--- /dev/null
+++ b/Platform/AMD/AmdPlatformPkg/Include/Library/AmdAcpiSdtParserLib.h
@@ -0,0 +1,118 @@
+/** @file
+ Header file of AMD ACPI SDT Parser
+
+ Copyright (C) 2023 Advanced Micro Devices, Inc. All rights reserved.
+ SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+/*
+ Verify SDT Header
+
+ @param[in,out] Buffer Current ACPI Table Pointer
+ @param[in,out] Size Current Size of ACPI Table
+ @param[in] NameString NameString to Locate
+
+ @retval EFI_SUCCESS Requested Scope found.
+ @retval EFI_NOT_FOUND Requested Scope not found.
+*/
+EFI_STATUS
+EFIAPI
+VerifySdtTableHeader (
+ IN OUT VOID *Buffer,
+ IN OUT UINT32 Size,
+ IN CHAR8 *NameString
+ );
+
+/*
+ Locate ACPI Device
+
+ DefDevice := DeviceOp PkgLength NameString TermList
+ DeviceOp := ExtOpPrefix 0x82
+
+ ExtOpPrefix := 0x5B
+
+ PkgLength := PkgLeadByte |
+ <PkgLeadByte ByteData> |
+ <PkgLeadByte ByteData ByteData> |
+ <PkgLeadByte ByteData ByteData ByteData>
+
+ PkgLeadByte := <bit 7-6: ByteData count that follows (0-3)>
+ <bit 5-4: Only used if PkgLength < 63>
+ <bit 3-0: Least significant package length nybble>
+
+ @param(in,out) Buffer Current ACPI Table Pointer
+ @param(in,out) Size Current Size of ACPI Table
+ @param(in) NameString NameString to Locate
+
+ @retval EFI_SUCCESS Requested Scope found.
+ @retval EFI_NOT_FOUND Requested Scope not found.
+*/
+EFI_STATUS
+EFIAPI
+LocateAcpiDefDeviceTermList (
+ IN OUT VOID **Buffer,
+ IN OUT UINT32 *Size,
+ IN CHAR8 *NameString
+ );
+
+/*
+ Locate ACPI Named Object
+
+ DefName := NameOp NameString DataRefObject
+ NameOp := 0x08
+
+ @param[in,out] Buffer Current ACPI Table Pointer
+ @param[in,out] Size Current Size of ACPI Table
+ @param[in] NameString NameString to Locate
+
+ @retval EFI_SUCCESS Requested Scope found.
+ @retval EFI_NOT_FOUND Requested Scope not found.
+*/
+EFI_STATUS
+EFIAPI
+LocateAcpiDefNameDataRefObject (
+ IN OUT VOID **Buffer,
+ IN OUT UINT32 *Size,
+ IN CHAR8 *NameString
+ );
+
+/*
+ Locate ACPI Buffer ByteList
+
+ DefBuffer := BufferOp PkgLength BufferSize ByteList
+ BufferOp := 0x11
+ BufferSize := TermArg => Integer
+
+ TermArg := Type2Opcode | DataObject | ArgObj | LocalObj
+
+ @param[in,out] Buffer Current ACPI Table Pointer
+ @param[in,out] Size Current Size of ACPI Table
+
+ @retval EFI_SUCCESS Requested Scope found.
+ @retval EFI_NOT_FOUND Requested Scope not found.
+*/
+EFI_STATUS
+EFIAPI
+LocateAcpiDefBufferByteList (
+ IN OUT VOID **Buffer,
+ IN OUT UINT32 *Size
+ );
+
+/*
+ Locate ACPI DefName Buffer ByteList
+
+ @param[in,out] Buffer Current ACPI Table Pointer
+ @param[in,out] Size Current Size of ACPI Table
+ @param[in] NameString NameString to Locate
+
+ @retval EFI_SUCCESS Requested Scope found.
+ @retval EFI_NOT_FOUND Requested Scope not found.
+*/
+EFI_STATUS
+EFIAPI
+LocateAcpiDefNameDefBufferByteList (
+ IN OUT VOID **Buffer,
+ IN OUT UINT32 *Size,
+ IN CHAR8 *NameString
+ );
diff --git
a/Platform/AMD/AmdPlatformPkg/Library/DxeAcpiSdtParserLib/DxeAcpiSdtParserLib.c
b/Platform/AMD/AmdPlatformPkg/Library/DxeAcpiSdtParserLib/DxeAcpiSdtParserLib.c
new file mode 100644
index 0000000000..b8c40114c2
--- /dev/null
+++
b/Platform/AMD/AmdPlatformPkg/Library/DxeAcpiSdtParserLib/DxeAcpiSdtParserLib.c
@@ -0,0 +1,382 @@
+/** @file
+ Implementation of AMD ACPI SDT Parser Library
+
+ Copyright (C) 2023 Advanced Micro Devices, Inc. All rights reserved.
+ SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#include <Base.h>
+#include <Library/BaseLib.h>
+#include <Library/BaseMemoryLib.h>
+#include <IndustryStandard/AcpiAml.h>
+#include <Library/DebugLib.h>
+#include <Library/AmdAcpiSdtParserLib.h>
+
+/*
+ Calculate PkgLength
+
+ @param[in] Buffer Current ACPI Table Pointer
+ @param[out] PkgLength NameString to Locate
+
+ @retval Number of bytes that make up the PkgLength
+*/
+UINT32
+AmlGetPkgLength (
+ IN UINT8 *Buffer,
+ OUT UINT32 *PkgLength
+ )
+{
+ UINT32 Bytes;
+ UINT32 Length;
+
+ Bytes = (UINT32)((Buffer[0] >> 6) & 0x3) + 1;
+ switch (Bytes) {
+ case 1:
+ Length = (UINT32)Buffer[0];
+ break;
+
+ case 2:
+ Length = (UINT32)(Buffer[0] & 0x0F);
+ Length += (UINT32)(Buffer[1] & 0xFF) << 4;
+ break;
+
+ case 3:
+ Length = (UINT32)(Buffer[0] & 0x0F);
+ Length += (UINT32)(Buffer[1] & 0xFF) << 4;
+ Length += (UINT32)(Buffer[2] & 0xFF) << 12;
+ break;
+
+ default: /* 4 bytes */
+ Length = (UINT32)(Buffer[0] & 0x0F);
+ Length += (UINT32)(Buffer[1] & 0xFF) << 4;
+ Length += (UINT32)(Buffer[2] & 0xFF) << 12;
+ Length += (UINT32)(Buffer[3] & 0xFF) << 20;
+ break;
+ }
+
+ *PkgLength = Length;
+ return Bytes;
+}
+
+/*
+ Find ACPI NameString through brute force.
+
+ @param[in,out] Buffer Current ACPI Table Pointer
+ @param[in,out] Size Current Size of ACPI Table
+ @param[in] NameString NameString to Locate
+
+ @retval EFI_SUCCESS Requested NameString found.
+ @retval EFI_NOT_FOUND Requested NameString not found.
+*/
+EFI_STATUS
+EFIAPI
+ScanAcpiTableNameString(
+ IN OUT VOID **Buffer,
+ IN OUT UINT32 *Size,
+ IN CHAR8 *NameString
+ )
+{
+ UINT32 RemainingSize;
+ UINTN NameStringLength;
+ UINT8 *CurrentLocation;
+
+ RemainingSize = *Size;
+ CurrentLocation = (UINT8 *)*Buffer;
+ NameStringLength = AsciiStrLen (NameString);
+ while (RemainingSize > 0) {
+ if (CompareMem (CurrentLocation, NameString, NameStringLength) == 0) {
+ break;
+ }
+ CurrentLocation++;
+ RemainingSize--;
+ }
+ if (RemainingSize == 0) {
+ DEBUG((DEBUG_ERROR, "%a: Did Not Find NameString %a\n", __func__,
NameString));
+ *Buffer = NULL;
+ *Size = 0;
+ return EFI_NOT_FOUND;
+ }
+ *Buffer = CurrentLocation;
+ *Size = RemainingSize;
+ return EFI_SUCCESS;
+}
+
+/*
+ Verify SDT Header
+
+ @param[in,out] Buffer Current ACPI Table Pointer
+ @param[in,out] Size Current Size of ACPI Table
+ @param[in] NameString NameString to Locate
+
+ @retval EFI_SUCCESS Requested Scope found.
+ @retval EFI_NOT_FOUND Requested Scope not found.
+*/
+EFI_STATUS
+EFIAPI
+VerifySdtTableHeader (
+ IN OUT VOID *Buffer,
+ IN OUT UINT32 Size,
+ IN CHAR8 *NameString
+ )
+{
+ EFI_STATUS Status;
+ EFI_ACPI_DESCRIPTION_HEADER *CurrentTable;
+ UINT32 Length;
+
+ Status = EFI_NOT_FOUND;
+ CurrentTable = (EFI_ACPI_DESCRIPTION_HEADER *)Buffer;
+ Length = (UINT32)AsciiStrLen (NameString);
+ if (CompareMem (&CurrentTable->Signature, NameString, Length) == 0 &&
+ CurrentTable->Length == Size) {
+ Status = EFI_SUCCESS;
+ }
+ if (EFI_ERROR (Status)) {
+ DEBUG ((DEBUG_ERROR, "%a: Table provided does not match %a\n", __func__,
NameString));
+ }
+ return Status;
+}
+
+/*
+ Locate ACPI Device
+
+ DefDevice := DeviceOp PkgLength NameString TermList
+ DeviceOp := ExtOpPrefix 0x82
+
+ ExtOpPrefix := 0x5B
+
+ PkgLength := PkgLeadByte |
+ <PkgLeadByte ByteData> |
+ <PkgLeadByte ByteData ByteData> |
+ <PkgLeadByte ByteData ByteData ByteData>
+
+ PkgLeadByte := <bit 7-6: ByteData count that follows (0-3)>
+ <bit 5-4: Only used if PkgLength < 63>
+ <bit 3-0: Least significant package length nybble>
+
+ @param[in,out] Buffer Current ACPI Table Pointer
+ @param[in,out] Size Current Size of ACPI Table
+ @param[in] NameString NameString to Locate
+
+ @retval EFI_SUCCESS Requested Scope found.
+ @retval EFI_NOT_FOUND Requested Scope not found.
+*/
+EFI_STATUS
+EFIAPI
+LocateAcpiDefDeviceTermList (
+ IN OUT VOID **Buffer,
+ IN OUT UINT32 *Size,
+ IN CHAR8 *NameString
+ )
+{
+ EFI_STATUS Status;
+ UINT32 RemainingSize;
+ UINT8 *CurrentLocation;
+ UINT8 *OpLocation;
+ UINT32 TermListSize;
+ UINT32 PkgLengthSize;
+ UINT32 NameStringLength;
+
+ CurrentLocation = *Buffer;
+ RemainingSize = *Size;
+ NameStringLength = (UINT32)AsciiStrnLenS (NameString, RemainingSize);
+
+ // Locate NameString
+ while (RemainingSize > 0) {
+ Status = ScanAcpiTableNameString ((VOID **)&CurrentLocation,
+ &RemainingSize,
+ NameString);
+ if (EFI_ERROR (Status)) {
+ ASSERT_EFI_ERROR (Status);
+ return Status;
+ }
+
+ // Look backwards for Op Code
+ for (OpLocation = CurrentLocation - 5;
+ OpLocation < CurrentLocation;
+ OpLocation++) {
+ if (*(UINT16 *)OpLocation == (AML_EXT_OP | (AML_EXT_DEVICE_OP << 8))) {
+ break;
+ }
+ }
+ if (OpLocation < CurrentLocation) {
+ PkgLengthSize = AmlGetPkgLength(OpLocation + 2, &TermListSize);
+
+ // Point to TermList and set size
+ CurrentLocation += NameStringLength;
+ TermListSize -= (PkgLengthSize + NameStringLength);
+ *Buffer = CurrentLocation;
+ *Size = TermListSize;
+ return EFI_SUCCESS;
+ } else {
+
+ // Not DeviceOp, so skip NameString and keep searching.
+ CurrentLocation += NameStringLength;
+ RemainingSize -= NameStringLength;
+ }
+ CurrentLocation++;
+ RemainingSize--;
+ }
+ ASSERT (FALSE);
+ return EFI_NOT_FOUND;
+}
+
+/*
+ Locate ACPI Named Object
+
+ DefName := NameOp NameString DataRefObject
+ NameOp := 0x08
+
+ @param[in,out] Buffer Current ACPI Table Pointer
+ @param[in,out] Size Current Size of ACPI Table
+ @param[in] NameString NameString to Locate
+
+ @retval EFI_SUCCESS Requested Scope found.
+ @retval EFI_NOT_FOUND Requested Scope not found.
+*/
+EFI_STATUS
+EFIAPI
+LocateAcpiDefNameDataRefObject (
+ IN OUT VOID **Buffer,
+ IN OUT UINT32 *Size,
+ IN CHAR8 *NameString
+ )
+{
+ EFI_STATUS Status;
+ UINT32 RemainingSize;
+ UINT8 *CurrentLocation;
+ UINT32 NameStringLength;
+
+ CurrentLocation = *Buffer;
+ RemainingSize = *Size;
+ NameStringLength = (UINT32)AsciiStrnLenS (NameString, RemainingSize);
+
+ // Locate NameString
+ while (RemainingSize > 0) {
+ Status = ScanAcpiTableNameString ((VOID **)&CurrentLocation,
+ &RemainingSize,
+ NameString);
+ if (EFI_ERROR (Status)) {
+ ASSERT_EFI_ERROR (Status);
+ return Status;
+ }
+
+ // Look backwards for Op Code
+ if (*(CurrentLocation - 1) == AML_NAME_OP) {
+ // Point to DataRefObject and set size
+ CurrentLocation += NameStringLength;
+ *Buffer = CurrentLocation;
+ *Size = RemainingSize - NameStringLength;
+ return EFI_SUCCESS;
+ } else {
+
+ // Not DeviceOp, so skip NameString and keep searching.
+ CurrentLocation += NameStringLength;
+ RemainingSize -= NameStringLength;
+ }
+ CurrentLocation++;
+ RemainingSize--;
+ }
+ ASSERT (FALSE);
+ return EFI_NOT_FOUND;
+}
+
+/*
+ Locate ACPI Buffer ByteList
+
+ DefBuffer := BufferOp PkgLength BufferSize ByteList
+ BufferOp := 0x11
+ BufferSize := TermArg => Integer
+
+ TermArg := Type2Opcode | DataObject | ArgObj | LocalObj
+
+ @param[in,out] Buffer Current ACPI Table Pointer
+ @param[in,out] Size Current Size of ACPI Table
+
+ @retval EFI_SUCCESS Requested Scope found.
+ @retval EFI_NOT_FOUND Requested Scope not found.
+*/
+EFI_STATUS
+EFIAPI
+LocateAcpiDefBufferByteList (
+ IN OUT VOID **Buffer,
+ IN OUT UINT32 *Size
+ )
+{
+ UINT32 RemainingSize;
+ UINT8 *CurrentLocation;
+ UINT32 PkgLength;
+ UINT32 PkgLengthSize;
+
+ CurrentLocation = *Buffer;
+ RemainingSize = *Size;
+ if (*CurrentLocation != AML_BUFFER_OP) {
+ ASSERT (FALSE);
+ return EFI_NOT_FOUND;
+ }
+ CurrentLocation++;
+ RemainingSize--;
+
+ // Get PackageLength and number PkgLenght Bytes
+ PkgLengthSize = AmlGetPkgLength (CurrentLocation, &PkgLength);
+ CurrentLocation += PkgLengthSize;
+ RemainingSize -= PkgLengthSize;
+
+ // Get Buffer Size and point to ByteList
+ CurrentLocation += 1;
+ switch (*(CurrentLocation - 1)) {
+ case AML_BYTE_PREFIX:
+ RemainingSize = *CurrentLocation;
+ CurrentLocation += sizeof (UINT8);
+ break;
+ case AML_WORD_PREFIX:
+ RemainingSize = *(UINT16 *)CurrentLocation;
+ CurrentLocation += sizeof (UINT16);
+ break;
+ case AML_DWORD_PREFIX:
+ RemainingSize = *(UINT32 *)CurrentLocation;
+ CurrentLocation += sizeof (UINT32);
+ break;
+ default:
+ ASSERT (FALSE);
+ return EFI_NOT_FOUND;
+ }
+ *Buffer = CurrentLocation;
+ *Size = RemainingSize;
+
+ return EFI_SUCCESS;
+}
+
+/*
+ Locate ACPI DefName Buffer ByteList
+
+ @param[in,out] Buffer Current ACPI Table Pointer
+ @param[in,out] Size Current Size of ACPI Table
+ @param[in] NameString NameString to Locate
+
+ @retval EFI_SUCCESS Requested Scope found.
+ @retval EFI_NOT_FOUND Requested Scope not found.
+*/
+EFI_STATUS
+EFIAPI
+LocateAcpiDefNameDefBufferByteList (
+ IN OUT VOID **Buffer,
+ IN OUT UINT32 *Size,
+ IN CHAR8 *NameString
+ )
+{
+ EFI_STATUS Status;
+
+ Status = LocateAcpiDefNameDataRefObject (
+ Buffer,
+ Size,
+ NameString
+ );
+ if (EFI_ERROR (Status)) {
+ ASSERT_EFI_ERROR (Status);
+ return Status;
+ }
+ Status = LocateAcpiDefBufferByteList (Buffer, Size);
+ ASSERT_EFI_ERROR (Status);
+ return Status;
+}
diff --git
a/Platform/AMD/AmdPlatformPkg/Library/DxeAcpiSdtParserLib/DxeAcpiSdtParserLib.uni
b/Platform/AMD/AmdPlatformPkg/Library/DxeAcpiSdtParserLib/DxeAcpiSdtParserLib.uni
new file mode 100644
index 0000000000..c674e75bc1
--- /dev/null
+++
b/Platform/AMD/AmdPlatformPkg/Library/DxeAcpiSdtParserLib/DxeAcpiSdtParserLib.uni
@@ -0,0 +1,12 @@
+## @file
+# UNI file of AMD ACPI SDT parser library
+#
+# Copyright (C) 2023 Advanced Micro Devices, Inc. All rights reserved.
+#
+# SPDX-License-Identifier: BSD-2-Clause-Patent
+##
+
+#string STR_MODULE_ABSTRACT #language en-US "AMD Dxe ACPI SDT
parser Library instance"
+
+#string STR_MODULE_DESCRIPTION #language en-US "AMD Dxe ACPI SDT
parser Library instance."
+
--
2.37.1.windows.1
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