Re: [edk2-devel] [PATCH 03/10] AlderlakeSiliconPkg/IpBlock: Add P2sb, PchDmi components

["Chaganty, Rangasai V" <rangasai.v.chaganty@intel.com>]

Reviewed-by: Sai Chaganty <rangasai.v.chaganty@intel.com>

-----Original Message-----
From: Kasbekar, Saloni <saloni.kasbekar@intel.com> 
Sent: Wednesday, September 13, 2023 3:14 PM
To: devel@edk2.groups.io
Cc: Kasbekar, Saloni <saloni.kasbekar@intel.com>; Chaganty, Rangasai V <rangasai.v.chaganty@intel.com>; Desimone, Nathaniel L <nathaniel.l.desimone@intel.com>; Chuang, Rosen <rosen.chuang@intel.com>
Subject: [PATCH 03/10] AlderlakeSiliconPkg/IpBlock: Add P2sb, PchDmi components

Adds the following modules:
  - IpBlock/P2sb/IncludePrivate
  - IpBlock/P2sb/Library
  - IpBlock/P2sb/LibraryPrivate
  - IpBlock/PchDmi/IncludePrivate
  - IpBlock/PchDmi/LibraryPrivate

Cc: Sai Chaganty <rangasai.v.chaganty@intel.com>
Cc: Nate DeSimone <nathaniel.l.desimone@intel.com>
Cc: Rosen Chuang <rosen.chuang@intel.com>
Signed-off-by: Saloni Kasbekar <saloni.kasbekar@intel.com>
---
 .../Library/P2SbSidebandAccessLib.h           | 105 +++++++
 .../IncludePrivate/Library/PchSbiAccessLib.h  |  58 ++++
 .../P2sb/IncludePrivate/P2SbController.h      |  32 +++
 .../P2sb/IncludePrivate/Register/P2sbRegs.h   |  53 ++++
 .../Library/PeiDxeSmmPchPcrLib/PchPcrLib.c    | 266 ++++++++++++++++++
 .../PeiDxeSmmPchPcrLib/PeiDxeSmmPchPcrLib.inf |  35 +++
 .../PeiDxeSmmP2SbSidebandAccessLib.c          | 208 ++++++++++++++
 .../PeiDxeSmmP2SbSidebandAccessLib.inf        |  30 ++
 .../PchSbiAccessLib.c                         |  72 +++++
 .../PeiDxeSmmPchSbiAccessLib.inf              |  35 +++
 .../PchDmi/IncludePrivate/Library/PchDmiLib.h |  60 ++++
 .../PeiDxeSmmPchDmiLib/PchDmi14.c             |  34 +++
 .../PeiDxeSmmPchDmiLib/PchDmi14.h             |  22 ++
 .../PeiDxeSmmPchDmiLib/PchDmiLib.c            | 110 ++++++++
 .../PeiDxeSmmPchDmiLib/PeiDxeSmmPchDmiLib.inf |  43 +++
 15 files changed, 1163 insertions(+)
 create mode 100644 Silicon/Intel/AlderlakeSiliconPkg/IpBlock/P2sb/IncludePrivate/Library/P2SbSidebandAccessLib.h
 create mode 100644 Silicon/Intel/AlderlakeSiliconPkg/IpBlock/P2sb/IncludePrivate/Library/PchSbiAccessLib.h
 create mode 100644 Silicon/Intel/AlderlakeSiliconPkg/IpBlock/P2sb/IncludePrivate/P2SbController.h
 create mode 100644 Silicon/Intel/AlderlakeSiliconPkg/IpBlock/P2sb/IncludePrivate/Register/P2sbRegs.h
 create mode 100644 Silicon/Intel/AlderlakeSiliconPkg/IpBlock/P2sb/Library/PeiDxeSmmPchPcrLib/PchPcrLib.c
 create mode 100644 Silicon/Intel/AlderlakeSiliconPkg/IpBlock/P2sb/Library/PeiDxeSmmPchPcrLib/PeiDxeSmmPchPcrLib.inf
 create mode 100644 Silicon/Intel/AlderlakeSiliconPkg/IpBlock/P2sb/LibraryPrivate/PeiDxeSmmP2SbSidebandAccessLib/PeiDxeSmmP2SbSidebandAccessLib.c
 create mode 100644 Silicon/Intel/AlderlakeSiliconPkg/IpBlock/P2sb/LibraryPrivate/PeiDxeSmmP2SbSidebandAccessLib/PeiDxeSmmP2SbSidebandAccessLib.inf
 create mode 100644 Silicon/Intel/AlderlakeSiliconPkg/IpBlock/P2sb/LibraryPrivate/PeiDxeSmmPchSbiAccessLib/PchSbiAccessLib.c
 create mode 100644 Silicon/Intel/AlderlakeSiliconPkg/IpBlock/P2sb/LibraryPrivate/PeiDxeSmmPchSbiAccessLib/PeiDxeSmmPchSbiAccessLib.inf
 create mode 100644 Silicon/Intel/AlderlakeSiliconPkg/IpBlock/PchDmi/IncludePrivate/Library/PchDmiLib.h
 create mode 100644 Silicon/Intel/AlderlakeSiliconPkg/IpBlock/PchDmi/LibraryPrivate/PeiDxeSmmPchDmiLib/PchDmi14.c
 create mode 100644 Silicon/Intel/AlderlakeSiliconPkg/IpBlock/PchDmi/LibraryPrivate/PeiDxeSmmPchDmiLib/PchDmi14.h
 create mode 100644 Silicon/Intel/AlderlakeSiliconPkg/IpBlock/PchDmi/LibraryPrivate/PeiDxeSmmPchDmiLib/PchDmiLib.c
 create mode 100644 Silicon/Intel/AlderlakeSiliconPkg/IpBlock/PchDmi/LibraryPrivate/PeiDxeSmmPchDmiLib/PeiDxeSmmPchDmiLib.inf

diff --git a/Silicon/Intel/AlderlakeSiliconPkg/IpBlock/P2sb/IncludePrivate/Library/P2SbSidebandAccessLib.h b/Silicon/Intel/AlderlakeSiliconPkg/IpBlock/P2sb/IncludePrivate/Library/P2SbSidebandAccessLib.h
new file mode 100644
index 0000000000..e364508eb4
--- /dev/null
+++ b/Silicon/Intel/AlderlakeSiliconPkg/IpBlock/P2sb/IncludePrivate/Libr
+++ ary/P2SbSidebandAccessLib.h
@@ -0,0 +1,105 @@
+/** @file
+  Header for P2SbSidebandAccessLib
+
+   Copyright (c) 2022, Intel Corporation. All rights reserved.<BR>
+   SPDX-License-Identifier: BSD-2-Clause-Patent **/
+
+#ifndef _P2SB_SIDEBAND_ACCESS_LIB_H_
+#define _P2SB_SIDEBAND_ACCESS_LIB_H_
+
+#include <RegisterAccess.h>
+#include <P2SbController.h>
+#include <Library/PchPcrLib.h> // For PCH_SBI_PID definition
+
+typedef PCH_SBI_PID  P2SB_PID;
+
+typedef enum {
+  P2SbMemory = 0,
+  P2SbPciConfig,
+  P2SbPrivateConfig
+} P2SB_REGISTER_SPACE;
+
+typedef enum {
+  MemoryRead             = 0x0,
+  MemoryWrite            = 0x1,
+  PciConfigRead          = 0x4,
+  PciConfigWrite         = 0x5,
+  PrivateControlRead     = 0x6,
+  PrivateControlWrite    = 0x7,
+  GpioLockUnlock         = 0x13
+} P2SB_SBI_OPCODE;
+
+typedef enum {
+  SBI_SUCCESSFUL          = 0,
+  SBI_UNSUCCESSFUL        = 1,
+  SBI_POWERDOWN           = 2,
+  SBI_MIXED               = 3,
+  SBI_INVALID_RESPONSE
+} P2SB_SBI_RESPONSE;
+
+typedef enum {
+  P2SbMmioAccess = 0,
+  P2SbMsgAccess
+} P2SB_SIDEBAND_ACCESS_METHOD;
+
+/**
+  REGISTER_ACCESS for P2SB device to support access to sideband registers.
+  Be sure to keep first member of this structure as REGISTER_ACCESS to 
+allow
+  for correct casting between caller who sees this structure as 
+REGISTER_ACCESS
+  and calle who will cast it to P2SB_SIDEBAND_REGISTER_ACCESS.
+**/
+typedef struct {
+  REGISTER_ACCESS              Access;
+  P2SB_SIDEBAND_ACCESS_METHOD  AccessMethod;
+  P2SB_PID                     P2SbPid;
+  UINT16                       Fid;
+  P2SB_REGISTER_SPACE          RegisterSpace;
+  BOOLEAN                      PostedWrites;
+  P2SB_CONTROLLER              *P2SbCtrl;
+} P2SB_SIDEBAND_REGISTER_ACCESS;
+
+/**
+  Full function for executing P2SB SBI message
+  Take care of that there is no lock protection when using SBI programming in both POST time and SMI.
+  It will clash with POST time SBI programming when SMI happen.
+  Programmer MUST do the save and restore opration while using the 
+PchSbiExecution inside SMI
+  to prevent from racing condition.
+  This function will reveal P2SB and hide P2SB if it's originally 
+hidden. If more than one SBI access
+  needed, it's better to unhide the P2SB before calling and hide it back after done.
+
+  When the return value is "EFI_SUCCESS", the "Response" do not need to 
+ be checked as it would have been  SBI_SUCCESS. If the return value is 
+ "EFI_DEVICE_ERROR", then this would provide additional information  when needed.
+
+  @param[in] P2sbBase                   P2SB PCI config base
+  @param[in] Pid                        Port ID of the SBI message
+  @param[in] Offset                     Offset of the SBI message
+  @param[in] Opcode                     Opcode
+  @param[in] Posted                     Posted message
+  @param[in] Fbe                        First byte enable
+  @param[in] Bar                        Bar
+  @param[in] Fid                        Function ID
+  @param[in, out] Data32                Read/Write data
+  @param[out] Response                  Response
+
+  @retval EFI_SUCCESS                   Successfully completed.
+  @retval EFI_DEVICE_ERROR              Transaction fail
+  @retval EFI_INVALID_PARAMETER         Invalid parameter
+  @retval EFI_TIMEOUT                   Timeout while waiting for response
+**/
+EFI_STATUS
+P2SbSbiExecutionEx (
+  IN     UINT64           P2sbBase,
+  IN     P2SB_PID         Pid,
+  IN     UINT64           Offset,
+  IN     P2SB_SBI_OPCODE  Opcode,
+  IN     BOOLEAN          Posted,
+  IN     UINT16           Fbe,
+  IN     UINT16           Bar,
+  IN     UINT16           Fid,
+  IN OUT UINT32           *Data32,
+  OUT    UINT8            *Response
+  );
+
+#endif
diff --git a/Silicon/Intel/AlderlakeSiliconPkg/IpBlock/P2sb/IncludePrivate/Library/PchSbiAccessLib.h b/Silicon/Intel/AlderlakeSiliconPkg/IpBlock/P2sb/IncludePrivate/Library/PchSbiAccessLib.h
new file mode 100644
index 0000000000..a46d8fb649
--- /dev/null
+++ b/Silicon/Intel/AlderlakeSiliconPkg/IpBlock/P2sb/IncludePrivate/Libr
+++ ary/PchSbiAccessLib.h
@@ -0,0 +1,58 @@
+/** @file
+  Header file for PchSbiAccessLib.
+
+   Copyright (c) 2022, Intel Corporation. All rights reserved.<BR>
+   SPDX-License-Identifier: BSD-2-Clause-Patent **/ #ifndef 
+_PCH_SBI_ACCESS_LIB_H_ #define _PCH_SBI_ACCESS_LIB_H_
+
+#include <Library/PchPcrLib.h>
+#include <Library/P2SbSidebandAccessLib.h>
+
+typedef P2SB_SBI_OPCODE  PCH_SBI_OPCODE ;
+
+typedef P2SB_SBI_RESPONSE  PCH_SBI_RESPONSE;
+
+/**
+  Full function for executing PCH SBI message
+  Take care of that there is no lock protection when using SBI programming in both POST time and SMI.
+  It will clash with POST time SBI programming when SMI happen.
+  Programmer MUST do the save and restore opration while using the 
+PchSbiExecution inside SMI
+  to prevent from racing condition.
+  This function will reveal P2SB and hide P2SB if it's originally 
+hidden. If more than one SBI access
+  needed, it's better to unhide the P2SB before calling and hide it back after done.
+
+  When the return value is "EFI_SUCCESS", the "Response" do not need to 
+ be checked as it would have been  SBI_SUCCESS. If the return value is 
+ "EFI_DEVICE_ERROR", then this would provide additional information  when needed.
+
+  @param[in] Pid                        Port ID of the SBI message
+  @param[in] Offset                     Offset of the SBI message
+  @param[in] Opcode                     Opcode
+  @param[in] Posted                     Posted message
+  @param[in] Fbe                        First byte enable
+  @param[in] Bar                        Bar
+  @param[in] Fid                        Function ID
+  @param[in, out] Data32                Read/Write data
+  @param[out] Response                  Response
+
+  @retval EFI_SUCCESS                   Successfully completed.
+  @retval EFI_DEVICE_ERROR              Transaction fail
+  @retval EFI_INVALID_PARAMETER         Invalid parameter
+  @retval EFI_TIMEOUT                   Timeout while waiting for response
+**/
+EFI_STATUS
+PchSbiExecutionEx (
+  IN     PCH_SBI_PID                    Pid,
+  IN     UINT64                         Offset,
+  IN     PCH_SBI_OPCODE                 Opcode,
+  IN     BOOLEAN                        Posted,
+  IN     UINT16                         Fbe,
+  IN     UINT16                         Bar,
+  IN     UINT16                         Fid,
+  IN OUT UINT32                         *Data32,
+  OUT    UINT8                          *Response
+  );
+
+#endif // _PCH_SBI_ACCESS_LIB_H_
diff --git a/Silicon/Intel/AlderlakeSiliconPkg/IpBlock/P2sb/IncludePrivate/P2SbController.h b/Silicon/Intel/AlderlakeSiliconPkg/IpBlock/P2sb/IncludePrivate/P2SbController.h
new file mode 100644
index 0000000000..51c67d4624
--- /dev/null
+++ b/Silicon/Intel/AlderlakeSiliconPkg/IpBlock/P2sb/IncludePrivate/P2Sb
+++ Controller.h
@@ -0,0 +1,32 @@
+/** @file
+  P2SB controller
+
+   Copyright (c) 2022, Intel Corporation. All rights reserved.<BR>
+   SPDX-License-Identifier: BSD-2-Clause-Patent **/ #ifndef 
+_P2SB_CONTROLLER_H_ #define _P2SB_CONTROLLER_H_
+
+/**
+  P2SB structure
+  Stores information required to access to registers
+  like base address, S:B:D:F etc.
+  and definitions specific to P2SB.
+**/
+typedef struct {
+  /**
+    P2SB controller PCI config space address
+    in PCI Segment Library representation.
+  **/
+  UINT64                      PciCfgBaseAddr;
+  /**
+    P2SB controller MMIO base address
+  **/
+  UINT64                      Mmio;
+  /**
+    HPET MMIO base address
+  **/
+  UINT64                      HpetMmio;
+} P2SB_CONTROLLER;
+
+#endif // _P2SB_CONTROLLER_H_
diff --git a/Silicon/Intel/AlderlakeSiliconPkg/IpBlock/P2sb/IncludePrivate/Register/P2sbRegs.h b/Silicon/Intel/AlderlakeSiliconPkg/IpBlock/P2sb/IncludePrivate/Register/P2sbRegs.h
new file mode 100644
index 0000000000..ffe35411f7
--- /dev/null
+++ b/Silicon/Intel/AlderlakeSiliconPkg/IpBlock/P2sb/IncludePrivate/Regi
+++ ster/P2sbRegs.h
@@ -0,0 +1,53 @@
+/** @file
+  Register names for PCH P2SB device
+
+  Conventions:
+
+  - Register definition format:
+    
+ Prefix_[GenerationName]_[ComponentName]_SubsystemName_RegisterSpace_Re
+ gisterName
+  - Prefix:
+    Definitions beginning with "R_" are registers
+    Definitions beginning with "B_" are bits within registers
+    Definitions beginning with "V_" are meaningful values within the bits
+    Definitions beginning with "S_" are register size
+    Definitions beginning with "N_" are the bit position
+  - [GenerationName]:
+    Three letter acronym of the generation is used (e.g. SKL,KBL,CNL etc.).
+    Register name without GenerationName applies to all generations.
+  - [ComponentName]:
+    This field indicates the component name that the register belongs to (e.g. PCH, SA etc.)
+    Register name without ComponentName applies to all components.
+    Register that is specific to -H denoted by "_PCH_H_" in component name.
+    Register that is specific to -LP denoted by "_PCH_LP_" in component name.
+  - SubsystemName:
+    This field indicates the subsystem name of the component that the register belongs to
+    (e.g. PCIE, USB, SATA, GPIO, PMC etc.).
+  - RegisterSpace:
+    MEM - MMIO space register of subsystem.
+    IO  - IO space register of subsystem.
+    PCR - Private configuration register of subsystem.
+    CFG - PCI configuration space register of subsystem.
+  - RegisterName:
+    Full register name.
+
+   Copyright (c) 2022, Intel Corporation. All rights reserved.<BR>
+   SPDX-License-Identifier: BSD-2-Clause-Patent **/ #ifndef 
+_P2SB_REGS_H_ #define _P2SB_REGS_H_
+
+//
+// Definition for SBI
+//
+#define R_P2SB_CFG_SBIADDR                         0xD0
+#define R_P2SB_CFG_SBIDATA                         0xD4
+#define R_P2SB_CFG_SBISTAT                         0xD8
+#define B_P2SB_CFG_SBISTAT_OPCODE                  0xFF00
+#define B_P2SB_CFG_SBISTAT_POSTED                  BIT7
+#define B_P2SB_CFG_SBISTAT_RESPONSE                0x0006
+#define N_P2SB_CFG_SBISTAT_RESPONSE                1
+#define B_P2SB_CFG_SBISTAT_INITRDY                 BIT0
+#define R_P2SB_CFG_SBIRID                          0xDA
+#define R_P2SB_CFG_SBIEXTADDR                      0xDC
+
+#endif
diff --git a/Silicon/Intel/AlderlakeSiliconPkg/IpBlock/P2sb/Library/PeiDxeSmmPchPcrLib/PchPcrLib.c b/Silicon/Intel/AlderlakeSiliconPkg/IpBlock/P2sb/Library/PeiDxeSmmPchPcrLib/PchPcrLib.c
new file mode 100644
index 0000000000..a5b18613bc
--- /dev/null
+++ b/Silicon/Intel/AlderlakeSiliconPkg/IpBlock/P2sb/Library/PeiDxeSmmPc
+++ hPcrLib/PchPcrLib.c
@@ -0,0 +1,266 @@
+/** @file
+  PCH PCR library.
+  All function in this library is available for PEI, DXE, and SMM,
+  But do not support UEFI RUNTIME environment call.
+
+   Copyright (c) 2022, Intel Corporation. All rights reserved.<BR>
+   SPDX-License-Identifier: BSD-2-Clause-Patent **/
+
+#include <Base.h>
+#include <Uefi/UefiBaseType.h>
+#include <Library/IoLib.h>
+#include <Library/DebugLib.h>
+#include <Library/BaseLib.h>
+#include <Library/PchInfoLib.h>
+#include <Library/PchPcrLib.h>
+#include <Library/PchSbiAccessLib.h>
+#include <Library/PciSegmentLib.h>
+#include <Register/PchPcrRegs.h>
+
+#ifndef MDEPKG_NDEBUG
+/**
+  Checks if the offset is valid for a given memory access width. Offset must align to width size.
+
+  @param[in]  Offset  Offset of a register
+  @param[in]  Size    Size of memory access in bytes
+
+  @retval FALSE  Offset is not valid for a given memory access
+  @retval TRUE   Offset is valid
+**/
+STATIC
+BOOLEAN
+PchIsPcrOffsetValid (
+  IN UINT32  Offset,
+  IN UINTN   Size
+  )
+{
+  if (!IsP2sb20bPcrSupported ()) {
+    if (((Offset & (Size - 1)) != 0) || (Offset > 0xFFFF)) {
+      DEBUG ((DEBUG_ERROR, "PCR offset error. Invalid Offset: %x Size: %x", Offset, Size));
+      return FALSE;
+    } else {
+      return TRUE;
+    }
+  } else {
+    if (((Offset & (Size - 1)) != 0) || (Offset > 0xFFFFF)) {
+      DEBUG ((DEBUG_ERROR, "PCR offset error. Invalid Offset: %x Size: %x", Offset, Size));
+      return FALSE;
+    } else {
+      return TRUE;
+    }
+  }
+}
+#endif
+
+/**
+  Read PCR register.
+  It returns PCR register and size in 4bytes.
+  The Offset should not exceed 0xFFFF and must be aligned with size.
+
+  @param[in]  Pid      Port ID
+  @param[in]  Offset   Register offset of this Port ID
+
+  @retval UINT32       PCR register value.
+**/
+UINT32
+PchPcrRead32 (
+  IN  PCH_SBI_PID                       Pid,
+  IN  UINT32                            Offset
+  )
+{
+#ifndef MDEPKG_NDEBUG
+  ASSERT (PchIsPcrOffsetValid (Offset, 4)); #endif
+  return MmioRead32 (PCH_PCR_ADDRESS (Pid, Offset)); }
+
+/**
+  Read PCR register.
+  It returns PCR register and size in 2bytes.
+  The Offset should not exceed 0xFFFF and must be aligned with size.
+
+  @param[in]  Pid      Port ID
+  @param[in]  Offset   Register offset of this Port ID
+
+  @retval UINT16       PCR register value.
+**/
+UINT16
+PchPcrRead16 (
+  IN  PCH_SBI_PID                       Pid,
+  IN  UINT32                            Offset
+  )
+{
+#ifndef MDEPKG_NDEBUG
+  ASSERT (PchIsPcrOffsetValid (Offset, 2)); #endif
+  return MmioRead16 (PCH_PCR_ADDRESS (Pid, Offset)); }
+
+/**
+  Read PCR register.
+  It returns PCR register and size in 1bytes.
+  The Offset should not exceed 0xFFFF and must be aligned with size.
+
+  @param[in]  Pid      Port ID
+  @param[in]  Offset   Register offset of this Port ID
+
+  @retval UINT8        PCR register value
+**/
+UINT8
+PchPcrRead8 (
+  IN  PCH_SBI_PID                       Pid,
+  IN  UINT32                            Offset
+  )
+{
+  return MmioRead8 (PCH_PCR_ADDRESS (Pid, Offset)); }
+
+/**
+  Write PCR register.
+  It programs PCR register and size in 4bytes.
+  The Offset should not exceed 0xFFFF and must be aligned with size.
+
+  @param[in]  Pid      Port ID
+  @param[in]  Offset   Register offset of Port ID.
+  @param[in]  Data     Input Data. Must be the same size as Size parameter.
+
+  @retval UINT32       Value written to register
+**/
+UINT32
+PchPcrWrite32 (
+  IN  PCH_SBI_PID                       Pid,
+  IN  UINT32                            Offset,
+  IN  UINT32                            Data
+  )
+{
+#ifndef MDEPKG_NDEBUG
+  ASSERT (PchIsPcrOffsetValid (Offset, 4)); #endif
+  MmioWrite32 (PCH_PCR_ADDRESS (Pid, Offset), Data);
+
+  return Data;
+
+}
+
+/**
+  Write PCR register.
+  It programs PCR register and size in 2bytes.
+  The Offset should not exceed 0xFFFF and must be aligned with size.
+
+  @param[in]  Pid      Port ID
+  @param[in]  Offset   Register offset of Port ID.
+  @param[in]  Data     Input Data. Must be the same size as Size parameter.
+
+  @retval  UINT16      Value written to register
+**/
+UINT16
+PchPcrWrite16 (
+  IN  PCH_SBI_PID                       Pid,
+  IN  UINT32                            Offset,
+  IN  UINT16                            Data
+  )
+{
+#ifndef MDEPKG_NDEBUG
+  ASSERT (PchIsPcrOffsetValid (Offset, 2)); #endif
+  MmioWrite16 (PCH_PCR_ADDRESS (Pid, Offset), Data);
+
+  return Data;
+}
+
+/**
+  Write PCR register.
+  It programs PCR register and size in 1bytes.
+  The Offset should not exceed 0xFFFF and must be aligned with size.
+
+  @param[in]  Pid      Port ID
+  @param[in]  Offset   Register offset of Port ID.
+  @param[in]  Data     Input Data. Must be the same size as Size parameter.
+
+  @retval  UINT8       Value written to register
+**/
+UINT8
+PchPcrWrite8 (
+  IN  PCH_SBI_PID                       Pid,
+  IN  UINT32                            Offset,
+  IN  UINT8                             Data
+  )
+{
+
+  MmioWrite8 (PCH_PCR_ADDRESS (Pid, Offset), Data);
+
+  return Data;
+}
+
+/**
+  Write PCR register.
+  It programs PCR register and size in 4bytes.
+  The Offset should not exceed 0xFFFF and must be aligned with size.
+
+  @param[in]  Pid      Port ID
+  @param[in]  Offset   Register offset of Port ID.
+  @param[in]  AndData  AND Data. Must be the same size as Size parameter.
+  @param[in]  OrData   OR Data. Must be the same size as Size parameter.
+
+  @retval  UINT32      Value written to register
+
+**/
+UINT32
+PchPcrAndThenOr32 (
+  IN  PCH_SBI_PID                       Pid,
+  IN  UINT32                            Offset,
+  IN  UINT32                            AndData,
+  IN  UINT32                            OrData
+  )
+{
+  return PchPcrWrite32 (Pid, Offset, (PchPcrRead32 (Pid, Offset) & 
+AndData) | OrData); }
+
+/**
+  Write PCR register.
+  It programs PCR register and size in 2bytes.
+  The Offset should not exceed 0xFFFF and must be aligned with size.
+
+  @param[in]  Pid      Port ID
+  @param[in]  Offset   Register offset of Port ID.
+  @param[in]  AndData  AND Data. Must be the same size as Size parameter.
+  @param[in]  OrData   OR Data. Must be the same size as Size parameter.
+
+  @retval UINT16       Value written to register
+
+**/
+UINT16
+PchPcrAndThenOr16 (
+  IN  PCH_SBI_PID                       Pid,
+  IN  UINT32                            Offset,
+  IN  UINT16                            AndData,
+  IN  UINT16                            OrData
+  )
+{
+  return PchPcrWrite16 (Pid, Offset, (PchPcrRead16 (Pid, Offset) & 
+AndData) | OrData); }
+
+/**
+  Write PCR register.
+  It programs PCR register and size in 1bytes.
+  The Offset should not exceed 0xFFFF and must be aligned with size.
+
+  @param[in]  Pid      Port ID
+  @param[in]  Offset   Register offset of Port ID.
+  @param[in]  AndData  AND Data. Must be the same size as Size parameter.
+  @param[in]  OrData   OR Data. Must be the same size as Size parameter.
+
+  @retval  UINT8       Value written to register
+
+**/
+UINT8
+PchPcrAndThenOr8 (
+  IN  PCH_SBI_PID                       Pid,
+  IN  UINT32                            Offset,
+  IN  UINT8                             AndData,
+  IN  UINT8                             OrData
+  )
+{
+  return PchPcrWrite8 (Pid, Offset, (PchPcrRead8 (Pid, Offset) & 
+AndData) | OrData); }
diff --git a/Silicon/Intel/AlderlakeSiliconPkg/IpBlock/P2sb/Library/PeiDxeSmmPchPcrLib/PeiDxeSmmPchPcrLib.inf b/Silicon/Intel/AlderlakeSiliconPkg/IpBlock/P2sb/Library/PeiDxeSmmPchPcrLib/PeiDxeSmmPchPcrLib.inf
new file mode 100644
index 0000000000..5e1b4914d8
--- /dev/null
+++ b/Silicon/Intel/AlderlakeSiliconPkg/IpBlock/P2sb/Library/PeiDxeSmmPc
+++ hPcrLib/PeiDxeSmmPchPcrLib.inf
@@ -0,0 +1,35 @@
+## @file
+# PCH PCR Library.
+#
+# All function in this library is available for PEI, DXE, and SMM, # 
+But do not support UEFI RUNTIME environment call.
+#
+#   Copyright (c) 2022, Intel Corporation. All rights reserved.<BR>
+#   SPDX-License-Identifier: BSD-2-Clause-Patent
+##
+
+
+[Defines]
+INF_VERSION = 0x00010017
+BASE_NAME = PeiDxeSmmPchPcrLib
+FILE_GUID = 117C8D19-445B-46BF-B624-109F63709375
+VERSION_STRING = 1.0
+MODULE_TYPE = BASE
+LIBRARY_CLASS = PchPcrLib
+
+
+[LibraryClasses]
+BaseLib
+IoLib
+DebugLib
+PchInfoLib
+PchSbiAccessLib
+PciSegmentLib
+
+[Packages]
+MdePkg/MdePkg.dec
+AlderlakeSiliconPkg/SiPkg.dec
+
+
+[Sources]
+PchPcrLib.c
diff --git a/Silicon/Intel/AlderlakeSiliconPkg/IpBlock/P2sb/LibraryPrivate/PeiDxeSmmP2SbSidebandAccessLib/PeiDxeSmmP2SbSidebandAccessLib.c b/Silicon/Intel/AlderlakeSiliconPkg/IpBlock/P2sb/LibraryPrivate/PeiDxeSmmP2SbSidebandAccessLib/PeiDxeSmmP2SbSidebandAccessLib.c
new file mode 100644
index 0000000000..52ec8fd9e1
--- /dev/null
+++ b/Silicon/Intel/AlderlakeSiliconPkg/IpBlock/P2sb/LibraryPrivate/PeiD
+++ xeSmmP2SbSidebandAccessLib/PeiDxeSmmP2SbSidebandAccessLib.c
@@ -0,0 +1,208 @@
+/** @file
+  P2SB sideband access lib
+
+   Copyright (c) 2022, Intel Corporation. All rights reserved.<BR>
+   SPDX-License-Identifier: BSD-2-Clause-Patent **/
+
+#include <Base.h>
+#include <Uefi/UefiBaseType.h>
+#include <Library/IoLib.h>
+#include <Library/DebugLib.h>
+#include <Library/BaseLib.h>
+#include <Library/PchInfoLib.h>
+#include <Library/P2SbSidebandAccessLib.h> #include 
+<Library/PciSegmentLib.h> #include <Library/PchSbiAccessLib.h> #include 
+<Register/P2sbRegs.h> #include <IndustryStandard/Pci30.h>
+
+#define P2SB_PCR_ADDRESS(MmioBase, Pid, Offset)  ((UINTN) MmioBase | 
+(UINT32) (((Offset) & 0x0F0000) << 8) | ((UINT8)(Pid) << 16) | (UINT16) 
+((Offset) & 0xFFFF))
+
+/**
+  Full function for executing P2SB SBI message
+  Take care of that there is no lock protection when using SBI programming in both POST time and SMI.
+  It will clash with POST time SBI programming when SMI happen.
+  Programmer MUST do the save and restore opration while using the 
+PchSbiExecution inside SMI
+  to prevent from racing condition.
+  This function will reveal P2SB and hide P2SB if it's originally 
+hidden. If more than one SBI access
+  needed, it's better to unhide the P2SB before calling and hide it back after done.
+
+  When the return value is "EFI_SUCCESS", the "Response" do not need to 
+ be checked as it would have been  SBI_SUCCESS. If the return value is 
+ "EFI_DEVICE_ERROR", then this would provide additional information  when needed.
+
+  @param[in] P2sbBase                   P2SB PCI config base
+  @param[in] Pid                        Port ID of the SBI message
+  @param[in] Offset                     Offset of the SBI message
+  @param[in] Opcode                     Opcode
+  @param[in] Posted                     Posted message
+  @param[in] Fbe                        First byte enable
+  @param[in] Bar                        Bar
+  @param[in] Fid                        Function ID
+  @param[in, out] Data32                Read/Write data
+  @param[out] Response                  Response
+
+  @retval EFI_SUCCESS                   Successfully completed.
+  @retval EFI_DEVICE_ERROR              Transaction fail
+  @retval EFI_INVALID_PARAMETER         Invalid parameter
+  @retval EFI_TIMEOUT                   Timeout while waiting for response
+**/
+EFI_STATUS
+P2SbSbiExecutionEx (
+  IN     UINT64           P2sbBase,
+  IN     P2SB_PID         Pid,
+  IN     UINT64           Offset,
+  IN     P2SB_SBI_OPCODE  Opcode,
+  IN     BOOLEAN          Posted,
+  IN     UINT16           Fbe,
+  IN     UINT16           Bar,
+  IN     UINT16           Fid,
+  IN OUT UINT32           *Data32,
+  OUT    UINT8            *Response
+  )
+{
+  INT32   Timeout;
+  UINT16  SbiStat;
+
+  //
+  // Check opcode valid
+  //
+  switch (Opcode) {
+    case MemoryRead:
+    case MemoryWrite:
+    case PciConfigRead:
+    case PciConfigWrite:
+    case PrivateControlRead:
+    case PrivateControlWrite:
+    case GpioLockUnlock:
+      break;
+    default:
+      return EFI_INVALID_PARAMETER;
+      break;
+  }
+
+  if (PciSegmentRead16 (P2sbBase + PCI_VENDOR_ID_OFFSET) == 0xFFFF) {
+    ASSERT (FALSE);
+    return EFI_DEVICE_ERROR;
+  }
+  ///
+  /// BWG Section 2.2.1
+  /// 1. Poll P2SB PCI offset D8h[0] = 0b  /// Make sure the previous 
+ opeartion is completed.
+  ///
+  Timeout = 0xFFFFFFF;
+  while (Timeout > 0) {
+    SbiStat = PciSegmentRead16 (P2sbBase + R_P2SB_CFG_SBISTAT);
+    if ((SbiStat & B_P2SB_CFG_SBISTAT_INITRDY) == 0) {
+      break;
+    }
+    Timeout--;
+  }
+  if (Timeout == 0) {
+    return EFI_TIMEOUT;
+  }
+  //
+  // Initial Response status
+  //
+  *Response = SBI_INVALID_RESPONSE;
+  SbiStat   = 0;
+  ///
+  /// 2. Write P2SB PCI offset D0h[31:0] with Address and Destination 
+ Port ID  ///
+  PciSegmentWrite32 (P2sbBase + R_P2SB_CFG_SBIADDR, (UINT32) ((Pid << 
+ 24) | (UINT16) Offset));  ///  /// 3. Write P2SB PCI offset DCh[31:0] 
+ with extended address, which is expected to be 0 in CNL PCH.
+  ///
+  PciSegmentWrite32 (P2sbBase + R_P2SB_CFG_SBIEXTADDR, (UINT32) 
+ RShiftU64 (Offset, 16));  ///  /// 5. Set P2SB PCI offset D8h[15:8] = 
+ 00000110b for read
+  ///    Set P2SB PCI offset D8h[15:8] = 00000111b for write
+  //
+  // Set SBISTAT[15:8] to the opcode passed in  // Set SBISTAT[7] to 
+ the posted passed in  //
+  PciSegmentAndThenOr16 (
+    (P2sbBase + R_P2SB_CFG_SBISTAT),
+    (UINT16) ~(B_P2SB_CFG_SBISTAT_OPCODE | B_P2SB_CFG_SBISTAT_POSTED),
+    (UINT16) ((Opcode << 8) | (Posted << 7))
+    );
+  ///
+  /// 6. Write P2SB PCI offset DAh[15:0] = F000h  ///  //  // Set 
+ RID[15:0] = Fbe << 12 | Bar << 8 | Fid  //
+  PciSegmentWrite16 (
+    (P2sbBase + R_P2SB_CFG_SBIRID),
+    (((Fbe & 0x000F) << 12) | ((Bar & 0x0007) << 8) | (Fid & 0x00FF))
+    );
+
+  switch (Opcode) {
+    case MemoryWrite:
+    case PciConfigWrite:
+    case PrivateControlWrite:
+    case GpioLockUnlock:
+      ///
+      /// 4. Write P2SB PCI offset D4h[31:0] with the intended data accordingly
+      ///
+      PciSegmentWrite32 ((P2sbBase + R_P2SB_CFG_SBIDATA), *Data32);
+      break;
+    default:
+      ///
+      /// 4. Write P2SB PCI offset D4h[31:0] with dummy data such as 0,
+      /// because all D0-DFh register range must be touched in CNL PCH
+      /// for a successful SBI transaction.
+      ///
+      PciSegmentWrite32 ((P2sbBase + R_P2SB_CFG_SBIDATA), 0);
+      break;
+  }
+  ///
+  /// 7. Set P2SB PCI offset D8h[0] = 1b, Poll P2SB PCI offset D8h[0] = 
+0b
+  ///
+  //
+  // Set SBISTAT[0] = 1b, trigger the SBI operation
+  //
+  PciSegmentOr16 (P2sbBase + R_P2SB_CFG_SBISTAT, (UINT16) 
+B_P2SB_CFG_SBISTAT_INITRDY);
+  //
+  // Poll SBISTAT[0] = 0b, Polling for Busy bit
+  //
+  Timeout = 0xFFFFFFF;
+  while (Timeout > 0) {
+    SbiStat = PciSegmentRead16 (P2sbBase + R_P2SB_CFG_SBISTAT);
+    if ((SbiStat & B_P2SB_CFG_SBISTAT_INITRDY) == 0) {
+      break;
+    }
+    Timeout--;
+  }
+  if (Timeout == 0) {
+    //
+    // If timeout, it's fatal error.
+    //
+    return EFI_TIMEOUT;
+  } else {
+    ///
+    /// 8. Check if P2SB PCI offset D8h[2:1] = 00b for successful transaction
+    ///
+    *Response = (UINT8) ((SbiStat & B_P2SB_CFG_SBISTAT_RESPONSE) >> N_P2SB_CFG_SBISTAT_RESPONSE);
+    if (*Response == SBI_SUCCESSFUL) {
+      switch (Opcode) {
+        case MemoryRead:
+        case PciConfigRead:
+        case PrivateControlRead:
+          ///
+          /// 9. Read P2SB PCI offset D4h[31:0] for SBI data
+          ///
+          *Data32 = PciSegmentRead32 (P2sbBase + R_P2SB_CFG_SBIDATA);
+          break;
+        default:
+          break;
+      }
+      return EFI_SUCCESS;
+    } else if (*Response == SBI_POWERDOWN) {
+      return EFI_NO_RESPONSE;
+    } else {
+      return EFI_DEVICE_ERROR;
+    }
+  }
+}
diff --git a/Silicon/Intel/AlderlakeSiliconPkg/IpBlock/P2sb/LibraryPrivate/PeiDxeSmmP2SbSidebandAccessLib/PeiDxeSmmP2SbSidebandAccessLib.inf b/Silicon/Intel/AlderlakeSiliconPkg/IpBlock/P2sb/LibraryPrivate/PeiDxeSmmP2SbSidebandAccessLib/PeiDxeSmmP2SbSidebandAccessLib.inf
new file mode 100644
index 0000000000..9530e56940
--- /dev/null
+++ b/Silicon/Intel/AlderlakeSiliconPkg/IpBlock/P2sb/LibraryPrivate/PeiD
+++ xeSmmP2SbSidebandAccessLib/PeiDxeSmmP2SbSidebandAccessLib.inf
@@ -0,0 +1,30 @@
+## @file
+# Library for accessing sideband register banks via the P2SB router.
+#
+# All function in this library is available for PEI, DXE, and SMM, # 
+But do not support UEFI RUNTIME environment call.
+#
+#   Copyright (c) 2022, Intel Corporation. All rights reserved.<BR>
+#   SPDX-License-Identifier: BSD-2-Clause-Patent
+##
+
+
+[Defines]
+INF_VERSION = 0x00010017
+BASE_NAME = PeiDxeSmmP2SbSidebandAccessLib FILE_GUID = 
+425C479D-A489-4382-8C28-59A3521A24FF
+VERSION_STRING = 1.0
+MODULE_TYPE = BASE
+LIBRARY_CLASS = P2SbSidebandAccessLib
+
+[LibraryClasses]
+BaseLib
+IoLib
+DebugLib
+
+[Packages]
+MdePkg/MdePkg.dec
+AlderlakeSiliconPkg/SiPkg.dec
+
+[Sources]
+PeiDxeSmmP2SbSidebandAccessLib.c
diff --git a/Silicon/Intel/AlderlakeSiliconPkg/IpBlock/P2sb/LibraryPrivate/PeiDxeSmmPchSbiAccessLib/PchSbiAccessLib.c b/Silicon/Intel/AlderlakeSiliconPkg/IpBlock/P2sb/LibraryPrivate/PeiDxeSmmPchSbiAccessLib/PchSbiAccessLib.c
new file mode 100644
index 0000000000..1f7bb82692
--- /dev/null
+++ b/Silicon/Intel/AlderlakeSiliconPkg/IpBlock/P2sb/LibraryPrivate/PeiD
+++ xeSmmPchSbiAccessLib/PchSbiAccessLib.c
@@ -0,0 +1,72 @@
+/** @file
+  PCH SBI access library.
+
+   Copyright (c) 2022, Intel Corporation. All rights reserved.<BR>
+   SPDX-License-Identifier: BSD-2-Clause-Patent **/
+
+#include <Base.h>
+#include <Uefi/UefiBaseType.h>
+#include <Library/IoLib.h>
+#include <Library/DebugLib.h>
+#include <Library/BaseLib.h>
+#include <Library/PchSbiAccessLib.h>
+#include <Library/P2SbSidebandAccessLib.h> #include 
+<Library/PchPciBdfLib.h> #include <Register/PchRegs.h> #include 
+<Register/P2sbRegs.h>
+
+/**
+  Full function for executing PCH SBI message
+  Take care of that there is no lock protection when using SBI programming in both POST time and SMI.
+  It will clash with POST time SBI programming when SMI happen.
+  Programmer MUST do the save and restore opration while using the 
+PchSbiExecution inside SMI
+  to prevent from racing condition.
+  This function will reveal P2SB and hide P2SB if it's originally 
+hidden. If more than one SBI access
+  needed, it's better to unhide the P2SB before calling and hide it back after done.
+
+  When the return value is "EFI_SUCCESS", the "Response" do not need to 
+ be checked as it would have been  SBI_SUCCESS. If the return value is 
+ "EFI_DEVICE_ERROR", then this would provide additional information  when needed.
+
+  @param[in] Pid                        Port ID of the SBI message
+  @param[in] Offset                     Offset of the SBI message
+  @param[in] Opcode                     Opcode
+  @param[in] Posted                     Posted message
+  @param[in] Fbe                        First byte enable
+  @param[in] Bar                        Bar
+  @param[in] Fid                        Function ID
+  @param[in, out] Data32                Read/Write data
+  @param[out] Response                  Response
+
+  @retval EFI_SUCCESS                   Successfully completed.
+  @retval EFI_DEVICE_ERROR              Transaction fail
+  @retval EFI_INVALID_PARAMETER         Invalid parameter
+  @retval EFI_TIMEOUT                   Timeout while waiting for response
+**/
+EFI_STATUS
+PchSbiExecutionEx (
+  IN     PCH_SBI_PID                    Pid,
+  IN     UINT64                         Offset,
+  IN     PCH_SBI_OPCODE                 Opcode,
+  IN     BOOLEAN                        Posted,
+  IN     UINT16                         Fbe,
+  IN     UINT16                         Bar,
+  IN     UINT16                         Fid,
+  IN OUT UINT32                         *Data32,
+  OUT    UINT8                          *Response
+  )
+{
+  return P2SbSbiExecutionEx (
+           P2sbPciCfgBase (),
+           Pid,
+           Offset,
+           Opcode,
+           Posted,
+           Fbe,
+           Bar,
+           Fid,
+           Data32,
+           Response
+           );
+}
diff --git a/Silicon/Intel/AlderlakeSiliconPkg/IpBlock/P2sb/LibraryPrivate/PeiDxeSmmPchSbiAccessLib/PeiDxeSmmPchSbiAccessLib.inf b/Silicon/Intel/AlderlakeSiliconPkg/IpBlock/P2sb/LibraryPrivate/PeiDxeSmmPchSbiAccessLib/PeiDxeSmmPchSbiAccessLib.inf
new file mode 100644
index 0000000000..a28a90c74b
--- /dev/null
+++ b/Silicon/Intel/AlderlakeSiliconPkg/IpBlock/P2sb/LibraryPrivate/PeiD
+++ xeSmmPchSbiAccessLib/PeiDxeSmmPchSbiAccessLib.inf
@@ -0,0 +1,35 @@
+## @file
+# PCH SBI access library.
+#
+# All function in this library is available for PEI, DXE, and SMM, # 
+But do not support UEFI RUNTIME environment call.
+#
+#   Copyright (c) 2022, Intel Corporation. All rights reserved.<BR>
+#   SPDX-License-Identifier: BSD-2-Clause-Patent
+##
+
+
+[Defines]
+INF_VERSION = 0x00010017
+BASE_NAME = PeiDxeSmmPchSbiAccessLib
+FILE_GUID = 96ECB0FB-A975-4DC8-B88A-D90C3378CE87
+VERSION_STRING = 1.0
+MODULE_TYPE = BASE
+LIBRARY_CLASS = PchSbiAccessLib
+
+
+[LibraryClasses]
+BaseLib
+IoLib
+DebugLib
+PchPciBdfLib
+P2SbSidebandAccessLib
+
+
+[Packages]
+MdePkg/MdePkg.dec
+AlderlakeSiliconPkg/SiPkg.dec
+
+
+[Sources]
+PchSbiAccessLib.c
diff --git a/Silicon/Intel/AlderlakeSiliconPkg/IpBlock/PchDmi/IncludePrivate/Library/PchDmiLib.h b/Silicon/Intel/AlderlakeSiliconPkg/IpBlock/PchDmi/IncludePrivate/Library/PchDmiLib.h
new file mode 100644
index 0000000000..efbb76f6be
--- /dev/null
+++ b/Silicon/Intel/AlderlakeSiliconPkg/IpBlock/PchDmi/IncludePrivate/Li
+++ brary/PchDmiLib.h
@@ -0,0 +1,60 @@
+/** @file
+  Header file for PchDmiLib.
+
+   Copyright (c) 2022, Intel Corporation. All rights reserved.<BR>
+   SPDX-License-Identifier: BSD-2-Clause-Patent **/ #ifndef 
+_PCH_DMI_LIB_H_ #define _PCH_DMI_LIB_H_
+
+/**
+  This function checks if DMI Secured Register Lock (SRL) is set
+
+  @retval SRL state
+**/
+BOOLEAN
+IsPchDmiLocked (
+  VOID
+  );
+
+/**
+  Get PCH TCO base address.
+
+  @retval Address                   Address of TCO base address.
+**/
+UINT16
+PchDmiGetTcoBase (
+  VOID
+  );
+
+/**
+  Set PCH LPC/eSPI IO decode ranges in DMI
+  Please check EDS for detail of LPC/eSPI IO decode ranges bit definition.
+  Bit  12: FDD range
+  Bit 9:8: LPT range
+  Bit 6:4: ComB range
+  Bit 2:0: ComA range
+
+  @param[in] LpcIoDecodeRanges          LPC/eSPI IO decode ranges bit settings.
+
+  @retval EFI_SUCCESS                   Successfully completed.
+  @retval EFI_UNSUPPORTED               DMIC.SRL is set.
+**/
+EFI_STATUS
+PchDmiSetLpcIoDecodeRanges (
+  IN  UINT16                            LpcIoDecodeRanges
+  );
+
+/**
+  Set PCH LPC/eSPI IO enable decoding in DMI
+
+  @param[in] LpcIoEnableDecoding        LPC/eSPI IO enable decoding bit settings.
+
+  @retval EFI_SUCCESS                   Successfully completed.
+  @retval EFI_UNSUPPORTED               DMIC.SRL is set.
+**/
+EFI_STATUS
+PchDmiSetLpcIoEnable (
+  IN  UINT16                            LpcIoEnableDecoding
+  );
+#endif // _PCH_DMI_LIB_H_
diff --git a/Silicon/Intel/AlderlakeSiliconPkg/IpBlock/PchDmi/LibraryPrivate/PeiDxeSmmPchDmiLib/PchDmi14.c b/Silicon/Intel/AlderlakeSiliconPkg/IpBlock/PchDmi/LibraryPrivate/PeiDxeSmmPchDmiLib/PchDmi14.c
new file mode 100644
index 0000000000..9f49790372
--- /dev/null
+++ b/Silicon/Intel/AlderlakeSiliconPkg/IpBlock/PchDmi/LibraryPrivate/Pe
+++ iDxeSmmPchDmiLib/PchDmi14.c
@@ -0,0 +1,34 @@
+/** @file
+  This file contains functions for PCH DMI SIP14
+
+   Copyright (c) 2022, Intel Corporation. All rights reserved.<BR>
+   SPDX-License-Identifier: BSD-2-Clause-Patent **/
+
+#include <Base.h>
+#include <Uefi/UefiBaseType.h>
+#include <Library/IoLib.h>
+#include <Library/DebugLib.h>
+#include <Library/BaseLib.h>
+#include <Library/PchInfoLib.h>
+#include <Library/PchPcrLib.h>
+#include <Library/PchDmiLib.h>
+#include <Library/PchCycleDecodingLib.h> #include <Library/PchPcrLib.h> 
+#include <Library/PchInfoLib.h> #include <Register/PchDmiRegs.h> 
+#include <Register/PchDmi14Regs.h> #include <Register/PchPcrRegs.h>
+
+/**
+  This function checks if DMI SIP14 Secured Register Lock (SRL) is set
+
+  @retval SRL state
+**/
+BOOLEAN
+IsPchDmi14Locked (
+  VOID
+  )
+{
+  return ((PchPcrRead32 (PID_DMI, R_PCH_DMI14_PCR_DMIC) & 
+B_PCH_DMI14_PCR_DMIC_SRL) != 0); }
diff --git a/Silicon/Intel/AlderlakeSiliconPkg/IpBlock/PchDmi/LibraryPrivate/PeiDxeSmmPchDmiLib/PchDmi14.h b/Silicon/Intel/AlderlakeSiliconPkg/IpBlock/PchDmi/LibraryPrivate/PeiDxeSmmPchDmiLib/PchDmi14.h
new file mode 100644
index 0000000000..494caebb4a
--- /dev/null
+++ b/Silicon/Intel/AlderlakeSiliconPkg/IpBlock/PchDmi/LibraryPrivate/Pe
+++ iDxeSmmPchDmiLib/PchDmi14.h
@@ -0,0 +1,22 @@
+/** @file
+  Internal header file for PCH DMI library for SIP14
+
+   Copyright (c) 2022, Intel Corporation. All rights reserved.<BR>
+   SPDX-License-Identifier: BSD-2-Clause-Patent **/ #ifndef 
+__PCH_DMI_14_H__ #define __PCH_DMI_14_H__
+
+#include <Library/PchDmiLib.h>
+
+/**
+  This function checks if DMI SIP14 Secured Register Lock (SRL) is set
+
+  @retval SRL state
+**/
+BOOLEAN
+IsPchDmi14Locked (
+  VOID
+  );
+
+#endif
diff --git a/Silicon/Intel/AlderlakeSiliconPkg/IpBlock/PchDmi/LibraryPrivate/PeiDxeSmmPchDmiLib/PchDmiLib.c b/Silicon/Intel/AlderlakeSiliconPkg/IpBlock/PchDmi/LibraryPrivate/PeiDxeSmmPchDmiLib/PchDmiLib.c
new file mode 100644
index 0000000000..3d5436f1a3
--- /dev/null
+++ b/Silicon/Intel/AlderlakeSiliconPkg/IpBlock/PchDmi/LibraryPrivate/Pe
+++ iDxeSmmPchDmiLib/PchDmiLib.c
@@ -0,0 +1,110 @@
+/** @file
+  PCH DMI library.
+
+   Copyright (c) 2022, Intel Corporation. All rights reserved.<BR>
+   SPDX-License-Identifier: BSD-2-Clause-Patent **/ #include <Base.h> 
+#include <Uefi/UefiBaseType.h> #include <Library/IoLib.h> #include 
+<Library/DebugLib.h> #include <Library/BaseLib.h> #include 
+<Library/PchInfoLib.h> #include <Library/PchPcrLib.h> #include 
+<Library/PchDmiLib.h> #include <Library/PchCycleDecodingLib.h> #include 
+<Register/PchPcrRegs.h> #include <Register/PchDmiRegs.h> #include 
+<Register/PchRegsLpc.h>
+
+#include "PchDmi14.h"
+
+/**
+  This function checks if DMI Secured Register Lock (SRL) is set
+
+  @retval SRL state
+**/
+BOOLEAN
+IsPchDmiLocked (
+  VOID
+  )
+{
+    return IsPchDmi14Locked ();
+}
+
+/**
+  Get PCH TCO base address.
+
+  @retval Address                   Address of TCO base address.
+**/
+UINT16
+PchDmiGetTcoBase (
+  VOID
+  )
+{
+  //
+  // Read "TCO Base Address" PCR[DMI] + 2778h[15:5]
+  //
+  return (PchPcrRead16 (PID_DMI, R_PCH_DMI_PCR_TCOBASE) & 
+B_PCH_DMI_PCR_TCOBASE_TCOBA); }
+
+/**
+  Set PCH LPC/eSPI IO decode ranges in DMI
+  Please check EDS for detail of LPC/eSPI IO decode ranges bit definition.
+  Bit  12: FDD range
+  Bit 9:8: LPT range
+  Bit 6:4: ComB range
+  Bit 2:0: ComA range
+
+  @param[in] LpcIoDecodeRanges          LPC/eSPI IO decode ranges bit settings.
+
+  @retval EFI_SUCCESS                   Successfully completed.
+  @retval EFI_UNSUPPORTED               DMIC.SRL is set.
+**/
+EFI_STATUS
+PchDmiSetLpcIoDecodeRanges (
+  IN  UINT16                            LpcIoDecodeRanges
+  )
+{
+  //
+  // This cycle decoding is only allowed to set when DMI is not locked.
+  //
+  if (IsPchDmiLocked ()) {
+    ASSERT (FALSE);
+    return EFI_UNSUPPORTED;
+  }
+
+  //
+  // program LPC I/O Decode Ranges, PCR[DMI] + 2770h[15:0] to the same value programmed in LPC/eSPI PCI offset 80h.
+  //
+  PchPcrWrite16 (PID_DMI, R_PCH_DMI_PCR_LPCIOD, LpcIoDecodeRanges);
+  return EFI_SUCCESS;
+}
+
+/**
+  Set PCH LPC/eSPI IO enable decoding in DMI
+
+  @param[in] LpcIoEnableDecoding        LPC/eSPI IO enable decoding bit settings.
+
+  @retval EFI_SUCCESS                   Successfully completed.
+  @retval EFI_UNSUPPORTED               DMIC.SRL is set.
+**/
+EFI_STATUS
+PchDmiSetLpcIoEnable (
+  IN  UINT16                            LpcIoEnableDecoding
+  )
+{
+  //
+  // This cycle decoding is only allowed to set when DMI is not locked.
+  //
+  if (IsPchDmiLocked ()) {
+    ASSERT (FALSE);
+    return EFI_UNSUPPORTED;
+  }
+
+  //
+  // program LPC I/O Decode Ranges, PCR[DMI] + 2774h[15:0] to the same value programmed in LPC/eSPI PCI offset 82h.
+  //
+  PchPcrWrite16 (PID_DMI, R_PCH_DMI_PCR_LPCIOE, LpcIoEnableDecoding);
+  return EFI_SUCCESS;
+}
diff --git a/Silicon/Intel/AlderlakeSiliconPkg/IpBlock/PchDmi/LibraryPrivate/PeiDxeSmmPchDmiLib/PeiDxeSmmPchDmiLib.inf b/Silicon/Intel/AlderlakeSiliconPkg/IpBlock/PchDmi/LibraryPrivate/PeiDxeSmmPchDmiLib/PeiDxeSmmPchDmiLib.inf
new file mode 100644
index 0000000000..4e92117be3
--- /dev/null
+++ b/Silicon/Intel/AlderlakeSiliconPkg/IpBlock/PchDmi/LibraryPrivate/Pe
+++ iDxeSmmPchDmiLib/PeiDxeSmmPchDmiLib.inf
@@ -0,0 +1,43 @@
+## @file
+#  Component description file for the PeiDxeSmmPchDmiLib #
+#   Copyright (c) 2022, Intel Corporation. All rights reserved.<BR>
+#   SPDX-License-Identifier: BSD-2-Clause-Patent
+##
+
+[Defines]
+INF_VERSION                    = 0x00010017
+BASE_NAME                      = PeiDxeSmmPchDmiLib
+FILE_GUID                      = 067DC1C4-2668-4F06-9921-307514B66B34
+VERSION_STRING                 = 1.0
+MODULE_TYPE                    = BASE
+LIBRARY_CLASS                  = PchDmiLib
+#
+# The following information is for reference only and not required by the build tools.
+#
+#  VALID_ARCHITECTURES           = IA32 X64
+#
+
+[LibraryClasses]
+  BaseLib
+  IoLib
+  DebugLib
+  PchInfoLib
+  PchPcrLib
+
+
+[Packages]
+  MdePkg/MdePkg.dec
+  AlderlakeSiliconPkg/SiPkg.dec
+
+
+[Sources]
+  PchDmiLib.c
+  PchDmi14.c
+  PchDmi14.h
+
+[Guids]
+  gPchDmiConfigGuid         ## CONSUMES
+  gPchDmiPreMemConfigGuid   ## CONSUMES
+
+[Pcd]
--
2.36.1.windows.1



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