UefiCpuPkg/MpInitLib: Add microcode definitions defined in IA32 SDM

Add microcode definitions defined in Intel(R) 64 and IA-32 Architectures
Software Developer's Manual Volume 3A, Section 9.11.

v4:
  1. ProcessorSignature type changed to CPU_MICROCODE_PROCESSOR_SIGNATURE
  2. Add pack(1) for structure CPU_MICROCODE_HEADER and
     CPU_MICROCODE_EXTENDED_TABLE.
v3:
  1. Update SDM date to June, 2016
  2. Mention BCD format in CPU_MICROCODE_DATE
  3. Rename ProcessorChecksum to Checksum to match SDM.

Cc: Michael Kinney <michael.d.kinney@intel.com>
Cc: Feng Tian <feng.tian@intel.com>
Cc: Giri P Mudusuru <giri.p.mudusuru@intel.com>
Cc: Laszlo Ersek <lersek@redhat.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Jeff Fan <jeff.fan@intel.com>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Michael Kinney <michael.d.kinney@intel.com>
Reviewed-by: Giri P Mudusuru <giri.p.mudusuru@intel.com>
Tested-by: Laszlo Ersek <lersek@redhat.com>
Tested-by: Michael Kinney <michael.d.kinney@intel.com>

UefiCpuPkg/Include/Register/Microcode.h

@@ -0,0 +1,200 @@
+/** @file
+  Microcode Definitions.
+
+  Microcode Definitions based on contents of the
+  Intel(R) 64 and IA-32 Architectures Software Developer's Manual
+    Volume 3A, Section 9.11  Microcode Definitions
+
+  Copyright (c) 2016, 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 Specification Reference:
+  Intel(R) 64 and IA-32 Architectures Software Developer's Manual, Volume 3A,
+  June 2016, Chapter 9 Processor Management and Initialization, Section 9-11.
+
+**/
+
+#ifndef __MICROCODE_H__
+#define __MICROCODE_H__
+
+///
+/// CPU Microcode Date in BCD format
+///
+typedef union {
+  struct {
+    UINT32   Year:16;
+    UINT32   Day:8;
+    UINT32   Month:8;
+  } Bits;
+  UINT32     Uint32;
+} CPU_MICROCODE_DATE;
+
+///
+/// CPU Microcode Processor Signature format
+///
+typedef union {
+  struct {
+    UINT32   Stepping:4;
+    UINT32   Model:4;
+    UINT32   Family:4;
+    UINT32   Type:2;
+    UINT32   Reserved1:2;
+    UINT32   ExtendedModel:4;
+    UINT32   ExtendedFamily:8;
+    UINT32   Reserved2:4;
+  } Bits;
+  UINT32     Uint32;
+} CPU_MICROCODE_PROCESSOR_SIGNATURE;
+
+#pragma pack (1)
+
+///
+/// Microcode Update Format definition
+///
+typedef struct {
+  ///
+  /// Version number of the update header
+  ///
+  UINT32                            HeaderVersion;
+  ///
+  /// Unique version number for the update, the basis for the update
+  /// signature provided by the processor to indicate the current update
+  /// functioning within the processor. Used by the BIOS to authenticate
+  /// the update and verify that the processor loads successfully. The
+  /// value in this field cannot be used for processor stepping identification
+  /// alone. This is a signed 32-bit number.
+  ///
+  UINT32                            UpdateRevision;
+  ///
+  /// Date of the update creation in binary format: mmddyyyy (e.g.
+  /// 07/18/98 is 07181998H).
+  ///
+  CPU_MICROCODE_DATE                Date;
+  ///
+  /// Extended family, extended model, type, family, model, and stepping
+  /// of processor that requires this particular update revision (e.g.,
+  /// 00000650H). Each microcode update is designed specifically for a
+  /// given extended family, extended model, type, family, model, and
+  /// stepping of the processor.
+  /// The BIOS uses the processor signature field in conjunction with the
+  /// CPUID instruction to determine whether or not an update is
+  /// appropriate to load on a processor. The information encoded within
+  /// this field exactly corresponds to the bit representations returned by
+  /// the CPUID instruction.
+  ///
+  CPU_MICROCODE_PROCESSOR_SIGNATURE ProcessorSignature;
+  ///
+  /// Checksum of Update Data and Header. Used to verify the integrity of
+  /// the update header and data. Checksum is correct when the
+  /// summation of all the DWORDs (including the extended Processor
+  /// Signature Table) that comprise the microcode update result in
+  /// 00000000H.
+  ///
+  UINT32                            Checksum;
+  ///
+  /// Version number of the loader program needed to correctly load this
+  /// update. The initial version is 00000001H
+  ///
+  UINT32                            LoaderRevision;
+  ///
+  /// Platform type information is encoded in the lower 8 bits of this 4-
+  /// byte field. Each bit represents a particular platform type for a given
+  /// CPUID. The BIOS uses the processor flags field in conjunction with
+  /// the platform Id bits in MSR (17H) to determine whether or not an
+  /// update is appropriate to load on a processor. Multiple bits may be set
+  /// representing support for multiple platform IDs.
+  ///
+  UINT32                            ProcessorFlags;
+  ///
+  /// Specifies the size of the encrypted data in bytes, and must be a
+  /// multiple of DWORDs. If this value is 00000000H, then the microcode
+  /// update encrypted data is 2000 bytes (or 500 DWORDs).
+  ///
+  UINT32                            DataSize;
+  ///
+  /// Specifies the total size of the microcode update in bytes. It is the
+  /// summation of the header size, the encrypted data size and the size of
+  /// the optional extended signature table. This value is always a multiple
+  /// of 1024.
+  ///
+  UINT32                            TotalSize;
+  ///
+  /// Reserved fields for future expansion.
+  ///
+  UINT8                             Reserved[12];
+} CPU_MICROCODE_HEADER;
+
+///
+/// Extended Signature Table Header Field Definitions
+///
+typedef struct {
+  ///
+  /// Specifies the number of extended signature structures (Processor
+  /// Signature[n], processor flags[n] and checksum[n]) that exist in this
+  /// microcode update
+  ///
+  UINT32                            ExtendedSignatureCount;
+  ///
+  /// Checksum of update extended processor signature table. Used to
+  /// verify the integrity of the extended processor signature table.
+  /// Checksum is correct when the summation of the DWORDs that
+  /// comprise the extended processor signature table results in
+  /// 00000000H.
+  ///
+  UINT32                            ExtendedChecksum;
+  ///
+  /// Reserved fields.
+  ///
+  UINT8                             Reserved[12];
+} CPU_MICROCODE_EXTENDED_TABLE_HEADER;
+
+///
+/// Extended Signature Table Field Definitions
+///
+typedef struct {
+  ///
+  /// Extended family, extended model, type, family, model, and stepping
+  /// of processor that requires this particular update revision (e.g.,
+  /// 00000650H). Each microcode update is designed specifically for a
+  /// given extended family, extended model, type, family, model, and
+  /// stepping of the processor.
+  /// The BIOS uses the processor signature field in conjunction with the
+  /// CPUID instruction to determine whether or not an update is
+  /// appropriate to load on a processor. The information encoded within
+  /// this field exactly corresponds to the bit representations returned by
+  /// the CPUID instruction.
+  ///
+  CPU_MICROCODE_PROCESSOR_SIGNATURE ProcessorSignature;
+  ///
+  /// Platform type information is encoded in the lower 8 bits of this 4-
+  /// byte field. Each bit represents a particular platform type for a given
+  /// CPUID. The BIOS uses the processor flags field in conjunction with
+  /// the platform Id bits in MSR (17H) to determine whether or not an
+  /// update is appropriate to load on a processor. Multiple bits may be set
+  /// representing support for multiple platform IDs.
+  ///
+  UINT32                             ProcessorFlag;
+  ///
+  /// Used by utility software to decompose a microcode update into
+  /// multiple microcode updates where each of the new updates is
+  /// constructed without the optional Extended Processor Signature
+  /// Table.
+  /// To calculate the Checksum, substitute the Primary Processor
+  /// Signature entry and the Processor Flags entry with the
+  /// corresponding Extended Patch entry. Delete the Extended Processor
+  /// Signature Table entries. The Checksum is correct when the
+  /// summation of all DWORDs that comprise the created Extended
+  /// Processor Patch results in 00000000H.
+  ///
+  UINT32                             Checksum;
+} CPU_MICROCODE_EXTENDED_TABLE;
+
+#pragma pack ()
+
+#endif