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diff --git a/src/include/ipxe/efi/Guid/Acpi.h b/src/include/ipxe/efi/Guid/Acpi.h
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+++ b/src/include/ipxe/efi/Guid/Acpi.h
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+/** @file
+  GUIDs used for ACPI entries in the EFI system table
+
+  These GUIDs point the ACPI tables as defined in the ACPI specifications.
+  ACPI 2.0 specification defines the ACPI 2.0 GUID. UEFI 2.0 defines the
+  ACPI 2.0 Table GUID and ACPI Table GUID.
+
+  Copyright (c) 2006 - 2009, Intel Corporation. All rights reserved.<BR>
+  This program and the accompanying materials
+  are licensed and made available under the terms and conditions of the BSD License
+  which accompanies this distribution.  The full text of the license may be found at
+  http://opensource.org/licenses/bsd-license.php
+
+  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+
+  @par Revision Reference:
+  GUIDs defined in UEFI 2.0 spec.
+
+**/
+
+#ifndef __ACPI_GUID_H__
+#define __ACPI_GUID_H__
+
+FILE_LICENCE ( BSD3 );
+
+#define ACPI_TABLE_GUID \
+  { \
+    0xeb9d2d30, 0x2d88, 0x11d3, {0x9a, 0x16, 0x0, 0x90, 0x27, 0x3f, 0xc1, 0x4d } \
+  }
+
+#define EFI_ACPI_TABLE_GUID \
+  { \
+    0x8868e871, 0xe4f1, 0x11d3, {0xbc, 0x22, 0x0, 0x80, 0xc7, 0x3c, 0x88, 0x81 } \
+  }
+
+#define ACPI_10_TABLE_GUID     ACPI_TABLE_GUID
+
+//
+// ACPI 2.0 or newer tables should use EFI_ACPI_TABLE_GUID.
+//
+#define EFI_ACPI_20_TABLE_GUID EFI_ACPI_TABLE_GUID
+
+extern EFI_GUID gEfiAcpiTableGuid;
+extern EFI_GUID gEfiAcpi10TableGuid;
+extern EFI_GUID gEfiAcpi20TableGuid;
+
+#endif