1 files changed, 58 insertions, 0 deletions
diff --git a/Core/UefiCpuPkg/CpuMpPei/Microcode.h b/Core/UefiCpuPkg/CpuMpPei/Microcode.h
new file mode 100644
index 0000000000..965604522a
--- /dev/null
+++ b/Core/UefiCpuPkg/CpuMpPei/Microcode.h
@@ -0,0 +1,58 @@
+/** @file
+  Definitions for loading microcode on processors.
+
+  Copyright (c) 2015, 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.
+
+**/
+
+#ifndef _CPU_MICROCODE_H_
+#define _CPU_MICROCODE_H_
+
+#define EFI_MSR_IA32_PLATFORM_ID         0x17
+#define EFI_MSR_IA32_BIOS_UPDT_TRIG      0x79
+#define EFI_MSR_IA32_BIOS_SIGN_ID        0x8b
+
+#define MAX_MICROCODE_DESCRIPTOR_LENGTH  100
+
+typedef struct {
+  VOID     *MicrocodeData;
+  UINTN    MicrocodeSize;
+  UINT32   ProcessorId;
+} MICROCODE_INFO;
+
+//
+// Definition for IA32 microcode format
+//
+typedef struct {
+  UINT32  HeaderVersion;
+  UINT32  UpdateRevision;
+  UINT32  Date;
+  UINT32  ProcessorId;
+  UINT32  Checksum;
+  UINT32  LoaderRevision;
+  UINT32  ProcessorFlags;
+  UINT32  DataSize;
+  UINT32  TotalSize;
+  UINT8   Reserved[12];
+} EFI_CPU_MICROCODE_HEADER;
+
+typedef struct {
+  UINT32  ExtendedSignatureCount;
+  UINT32  ExtendedTableChecksum;
+  UINT8   Reserved[12];
+} EFI_CPU_MICROCODE_EXTENDED_TABLE_HEADER;
+
+typedef struct {
+  UINT32  ProcessorSignature;
+  UINT32  ProcessorFlag;
+  UINT32  ProcessorChecksum;
+} EFI_CPU_MICROCODE_EXTENDED_TABLE;
+
+#endif