X-Git-Url: https://git.proxmox.com/?a=blobdiff_plain;f=EmbeddedPkg%2FInclude%2FLibrary%2FAcpiLib.h;fp=EmbeddedPkg%2FInclude%2FLibrary%2FAcpiLib.h;h=9dbacd85b0ef7c1f68e18be7a1aa6f93bf2ec135;hb=c63a10ecb7d66904f04fe65b0cef49c095ce49a6;hp=4f2001bfc827d39f61c5131fc109c1b93873a716;hpb=ab5ab2f60348138a4b7b1c95ad6f5d0954fb96f1;p=mirror_edk2.git

diff --git a/EmbeddedPkg/Include/Library/AcpiLib.h b/EmbeddedPkg/Include/Library/AcpiLib.h
index 4f2001bfc8..9dbacd85b0 100644
--- a/EmbeddedPkg/Include/Library/AcpiLib.h
+++ b/EmbeddedPkg/Include/Library/AcpiLib.h
@@ -2,6 +2,7 @@
   Helper Library for ACPI
 
   Copyright (c) 2014-2016, ARM Ltd. All rights reserved.
+  Copyright (c) 2021, Ampere Computing LLC. All rights reserved.
 
   SPDX-License-Identifier: BSD-2-Clause-Patent
 
@@ -13,6 +14,7 @@
 #include <Uefi.h>
 
 #include <IndustryStandard/Acpi10.h>
+#include <Protocol/AcpiSystemDescriptionTable.h>
 
 //
 // Macros for the Generic Address Space
@@ -128,4 +130,73 @@ LocateAndInstallAcpiFromFv (
   IN CONST EFI_GUID  *AcpiFile
   );
 
+/**
+  This function calculates and updates a UINT8 checksum
+  in an ACPI description table header.
+
+  @param  Buffer          Pointer to buffer to checksum
+  @param  Size            Number of bytes to checksum
+
+  @retval EFI_SUCCESS             The function completed successfully.
+  @retval EFI_INVALID_PARAMETER   Invalid parameter.
+
+**/
+EFI_STATUS
+EFIAPI
+AcpiUpdateChecksum (
+  IN OUT  UINT8      *Buffer,
+  IN      UINTN      Size
+  );
+
+/**
+  This function uses the ACPI SDT protocol to search an ACPI table
+  with a given signature.
+
+  @param  AcpiTableSdtProtocol    Pointer to ACPI SDT protocol.
+  @param  TableSignature          ACPI table signature.
+  @param  Index                   The zero-based index of the table where to search the table.
+                                  The index will be updated to the next instance if the table
+                                  is found with the matched TableSignature.
+  @param  Table                   Pointer to the table.
+  @param  TableKey                Pointer to the table key.
+
+  @return EFI_SUCCESS             The function completed successfully.
+  @return EFI_INVALID_PARAMETER   At least one of parameters is invalid.
+  @retval EFI_NOT_FOUND           The requested index is too large and a table was not found.
+
+**/
+EFI_STATUS
+EFIAPI
+AcpiLocateTableBySignature (
+  IN      EFI_ACPI_SDT_PROTOCOL           *AcpiSdtProtocol,
+  IN      UINT32                          TableSignature,
+  IN OUT  UINTN                           *Index,
+  OUT     EFI_ACPI_DESCRIPTION_HEADER     **Table,
+  OUT     UINTN                           *TableKey
+  );
+
+/**
+  This function updates the integer value of an AML Object.
+
+  @param  AcpiTableSdtProtocol    Pointer to ACPI SDT protocol.
+  @param  TableHandle             Points to the table representing the starting point
+                                  for the object path search.
+  @param  AsciiObjectPath         Pointer to the ACPI path of the object being updated.
+  @param  Value                   New value to write to the object.
+
+  @return EFI_SUCCESS             The function completed successfully.
+  @return EFI_INVALID_PARAMETER   At least one of parameters is invalid or the data type
+                                  of the ACPI object is not an integer value.
+  @retval EFI_NOT_FOUND           The object is not found with the given path.
+
+**/
+EFI_STATUS
+EFIAPI
+AcpiAmlObjectUpdateInteger (
+  IN  EFI_ACPI_SDT_PROTOCOL           *AcpiSdtProtocol,
+  IN  EFI_ACPI_HANDLE                 TableHandle,
+  IN  CHAR8                           *AsciiObjectPath,
+  IN  UINTN                           Value
+  );
+
 #endif // __ACPI_LIB_H__