[edk2-devel] [Patch V2 29/40] TigerlakeSiliconPkg/IpBlock: Add Spi component
Heng Luo
heng.luo at intel.com
Thu Feb 4 08:49:08 UTC 2021
REF: https://bugzilla.tianocore.org/show_bug.cgi?id=3171
Adds the following files:
* IpBlock/Spi/IncludePrivate
* IpBlock/Spi/Library
* IpBlock/Spi/LibraryPrivate
* IpBlock/Spi/Smm
Cc: Sai Chaganty <rangasai.v.chaganty at intel.com>
Cc: Nate DeSimone <nathaniel.l.desimone at intel.com>
Signed-off-by: Heng Luo <heng.luo at intel.com>
---
Silicon/Intel/TigerlakeSiliconPkg/IpBlock/Spi/IncludePrivate/Library/SpiAccessPrivateLib.h | 40 ++++++++++++++++++++++++++++++++
Silicon/Intel/TigerlakeSiliconPkg/IpBlock/Spi/IncludePrivate/Library/SpiCommonLib.h | 364 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Silicon/Intel/TigerlakeSiliconPkg/IpBlock/Spi/IncludePrivate/Register/SpiRegs.h | 136 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Silicon/Intel/TigerlakeSiliconPkg/IpBlock/Spi/Library/PeiDxeSmmSpiAccessLib/PeiDxeSmmSpiAccessLib.inf | 33 ++++++++++++++++++++++++++
Silicon/Intel/TigerlakeSiliconPkg/IpBlock/Spi/Library/PeiDxeSmmSpiAccessLib/SpiAccessLib.c | 477 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Silicon/Intel/TigerlakeSiliconPkg/IpBlock/Spi/LibraryPrivate/BaseSpiCommonLib/BaseSpiCommonLib.inf | 31 +++++++++++++++++++++++++
Silicon/Intel/TigerlakeSiliconPkg/IpBlock/Spi/LibraryPrivate/BaseSpiCommonLib/SpiCommon.c | 1115 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Silicon/Intel/TigerlakeSiliconPkg/IpBlock/Spi/LibraryPrivate/PeiDxeSmmSpiAccessPrivateLib/PeiDxeSmmSpiAccessPrivateLib.inf | 40 ++++++++++++++++++++++++++++++++
Silicon/Intel/TigerlakeSiliconPkg/IpBlock/Spi/LibraryPrivate/PeiDxeSmmSpiAccessPrivateLib/SpiAccessPrivateLib.c | 133 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Silicon/Intel/TigerlakeSiliconPkg/IpBlock/Spi/Smm/Spi.c | 296 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Silicon/Intel/TigerlakeSiliconPkg/IpBlock/Spi/Smm/SpiSmm.inf | 47 +++++++++++++++++++++++++++++++++++++
11 files changed, 2712 insertions(+)
diff --git a/Silicon/Intel/TigerlakeSiliconPkg/IpBlock/Spi/IncludePrivate/Library/SpiAccessPrivateLib.h b/Silicon/Intel/TigerlakeSiliconPkg/IpBlock/Spi/IncludePrivate/Library/SpiAccessPrivateLib.h
new file mode 100644
index 0000000000..6da88a9047
--- /dev/null
+++ b/Silicon/Intel/TigerlakeSiliconPkg/IpBlock/Spi/IncludePrivate/Library/SpiAccessPrivateLib.h
@@ -0,0 +1,40 @@
+/** @file
+ SPI library header for abstraction of SPI HW registers accesses
+
+ Copyright (c) 2021, Intel Corporation. All rights reserved.<BR>
+ SPDX-License-Identifier: BSD-2-Clause-Patent
+**/
+
+#ifndef _SPI_ACCESS_PRIVATE_LIB_H_
+#define _SPI_ACCESS_PRIVATE_LIB_H_
+
+/**
+ Disable EISS (Enable InSMM.STS)
+**/
+VOID
+SpiDisableEiss (
+ VOID
+ );
+
+/**
+ Configure BiosLockEnable bit and BiosInterfaceLock bit according to policy setting.
+
+ @param[in] BiosLockEnable Policy for BiosLockEnable bit programming
+ @param[in] BiosInterfaceLock Policy for BiosInterfaceLock bit programming
+
+**/
+VOID
+SpiBiosLockEnableAndBiosInterfaceLockWithS3BootScript (
+ IN BOOLEAN BiosLockEnable,
+ IN BOOLEAN BiosInterfaceLock
+ );
+
+/**
+ Clears BIOS Write Protect Disable bit
+**/
+VOID
+SpiClearBiosWriteProtectDisable (
+ VOID
+ );
+
+#endif // _SPI_ACCESS_PRIVATE_LIB_H_
diff --git a/Silicon/Intel/TigerlakeSiliconPkg/IpBlock/Spi/IncludePrivate/Library/SpiCommonLib.h b/Silicon/Intel/TigerlakeSiliconPkg/IpBlock/Spi/IncludePrivate/Library/SpiCommonLib.h
new file mode 100644
index 0000000000..3290f77122
--- /dev/null
+++ b/Silicon/Intel/TigerlakeSiliconPkg/IpBlock/Spi/IncludePrivate/Library/SpiCommonLib.h
@@ -0,0 +1,364 @@
+/** @file
+ Header file for the PCH SPI Common Driver.
+
+ Copyright (c) 2021, Intel Corporation. All rights reserved.<BR>
+ SPDX-License-Identifier: BSD-2-Clause-Patent
+**/
+#ifndef _SPI_COMMON_LIB_H_
+#define _SPI_COMMON_LIB_H_
+
+#include <Protocol/Spi.h>
+
+//
+// Maximum time allowed while waiting the SPI cycle to complete
+// Wait Time = 6 seconds = 6000000 microseconds
+// Wait Period = 10 microseconds
+//
+#define SPI_WAIT_TIME 6000000 ///< Wait Time = 6 seconds = 6000000 microseconds
+#define SPI_WAIT_PERIOD 10 ///< Wait Period = 10 microseconds
+
+///
+/// Flash cycle Type
+///
+typedef enum {
+ FlashCycleRead,
+ FlashCycleWrite,
+ FlashCycleErase,
+ FlashCycleReadSfdp,
+ FlashCycleReadJedecId,
+ FlashCycleWriteStatus,
+ FlashCycleReadStatus,
+ FlashCycleMax
+} FLASH_CYCLE_TYPE;
+
+///
+/// Flash Component Number
+///
+typedef enum {
+ FlashComponent0,
+ FlashComponent1,
+ FlashComponentMax
+} FLASH_COMPONENT_NUM;
+
+///
+/// Private data structure definitions for the driver
+///
+#define PCH_SPI_PRIVATE_DATA_SIGNATURE SIGNATURE_32 ('P', 'S', 'P', 'I')
+
+typedef struct {
+ UINT32 Signature;
+ EFI_HANDLE Handle;
+ PCH_SPI_PROTOCOL SpiProtocol;
+ UINT16 PchAcpiBase;
+ UINT64 PchSpiBase;
+ UINT8 ReadPermission;
+ UINT8 WritePermission;
+ UINT32 SfdpVscc0Value;
+ UINT32 SfdpVscc1Value;
+ UINT16 PchStrapBaseAddr;
+ UINT16 PchStrapSize;
+ UINT16 CpuStrapBaseAddr;
+ UINT16 CpuStrapSize;
+ UINT8 NumberOfComponents;
+ UINT32 Component1StartAddr;
+ UINT32 TotalFlashSize;
+} SPI_INSTANCE;
+
+#define SPI_INSTANCE_FROM_SPIPROTOCOL(a) CR (a, SPI_INSTANCE, SpiProtocol, PCH_SPI_PRIVATE_DATA_SIGNATURE)
+
+//
+// Function prototypes used by the SPI protocol.
+//
+
+/**
+ Initialize an SPI protocol instance.
+
+ @param[in] SpiInstance Pointer to SpiInstance to initialize
+
+ @retval EFI_SUCCESS The protocol instance was properly initialized
+ @exception EFI_UNSUPPORTED The PCH is not supported by this module
+**/
+EFI_STATUS
+SpiProtocolConstructor (
+ IN SPI_INSTANCE *SpiInstance
+ );
+
+/**
+ This function is a hook for Spi to disable BIOS Write Protect
+
+ @retval EFI_SUCCESS The protocol instance was properly initialized
+ @retval EFI_ACCESS_DENIED The BIOS Region can only be updated in SMM phase
+
+**/
+EFI_STATUS
+EFIAPI
+DisableBiosWriteProtect (
+ VOID
+ );
+
+/**
+ This function is a hook for Spi to enable BIOS Write Protect
+
+
+**/
+VOID
+EFIAPI
+EnableBiosWriteProtect (
+ VOID
+ );
+
+/**
+ Acquire pch spi mmio address.
+
+ @param[in] SpiInstance Pointer to SpiInstance to initialize
+
+ @retval PchSpiBar0 return SPI MMIO address
+**/
+UINTN
+AcquireSpiBar0 (
+ IN SPI_INSTANCE *SpiInstance
+ );
+
+/**
+ Release pch spi mmio address.
+
+ @param[in] SpiInstance Pointer to SpiInstance to initialize
+
+ @retval None
+**/
+VOID
+ReleaseSpiBar0 (
+ IN SPI_INSTANCE *SpiInstance
+ );
+
+/**
+ Check if it's granted to do flash write.
+
+ @retval TRUE It's secure to do flash write.
+ @retval FALSE It's not secure to do flash write.
+**/
+BOOLEAN
+IsSpiFlashWriteGranted (
+ VOID
+ );
+
+/**
+ Read data from the flash part.
+
+ @param[in] This Pointer to the PCH_SPI_PROTOCOL instance.
+ @param[in] FlashRegionType The Flash Region type for flash cycle which is listed in the Descriptor.
+ @param[in] Address The Flash Linear Address must fall within a region for which BIOS has access permissions.
+ @param[in] ByteCount Number of bytes in the data portion of the SPI cycle.
+ @param[out] Buffer The Pointer to caller-allocated buffer containing the dada received.
+ It is the caller's responsibility to make sure Buffer is large enough for the total number of bytes read.
+
+ @retval EFI_SUCCESS Command succeed.
+ @retval EFI_INVALID_PARAMETER The parameters specified are not valid.
+ @retval EFI_DEVICE_ERROR Device error, command aborts abnormally.
+**/
+EFI_STATUS
+EFIAPI
+SpiProtocolFlashRead (
+ IN PCH_SPI_PROTOCOL *This,
+ IN FLASH_REGION_TYPE FlashRegionType,
+ IN UINT32 Address,
+ IN UINT32 ByteCount,
+ OUT UINT8 *Buffer
+ );
+
+/**
+ Write data to the flash part.
+
+ @param[in] This Pointer to the PCH_SPI_PROTOCOL instance.
+ @param[in] FlashRegionType The Flash Region type for flash cycle which is listed in the Descriptor.
+ @param[in] Address The Flash Linear Address must fall within a region for which BIOS has access permissions.
+ @param[in] ByteCount Number of bytes in the data portion of the SPI cycle.
+ @param[in] Buffer Pointer to caller-allocated buffer containing the data sent during the SPI cycle.
+
+ @retval EFI_SUCCESS Command succeed.
+ @retval EFI_INVALID_PARAMETER The parameters specified are not valid.
+ @retval EFI_DEVICE_ERROR Device error, command aborts abnormally.
+**/
+EFI_STATUS
+EFIAPI
+SpiProtocolFlashWrite (
+ IN PCH_SPI_PROTOCOL *This,
+ IN FLASH_REGION_TYPE FlashRegionType,
+ IN UINT32 Address,
+ IN UINT32 ByteCount,
+ IN UINT8 *Buffer
+ );
+
+/**
+ Erase some area on the flash part.
+
+ @param[in] This Pointer to the PCH_SPI_PROTOCOL instance.
+ @param[in] FlashRegionType The Flash Region type for flash cycle which is listed in the Descriptor.
+ @param[in] Address The Flash Linear Address must fall within a region for which BIOS has access permissions.
+ @param[in] ByteCount Number of bytes in the data portion of the SPI cycle.
+
+ @retval EFI_SUCCESS Command succeed.
+ @retval EFI_INVALID_PARAMETER The parameters specified are not valid.
+ @retval EFI_DEVICE_ERROR Device error, command aborts abnormally.
+**/
+EFI_STATUS
+EFIAPI
+SpiProtocolFlashErase (
+ IN PCH_SPI_PROTOCOL *This,
+ IN FLASH_REGION_TYPE FlashRegionType,
+ IN UINT32 Address,
+ IN UINT32 ByteCount
+ );
+
+/**
+ Read SFDP data from the flash part.
+
+ @param[in] This Pointer to the PCH_SPI_PROTOCOL instance.
+ @param[in] ComponentNumber The Componen Number for chip select
+ @param[in] Address The starting byte address for SFDP data read.
+ @param[in] ByteCount Number of bytes in SFDP data portion of the SPI cycle
+ @param[out] SfdpData The Pointer to caller-allocated buffer containing the SFDP data received
+ It is the caller's responsibility to make sure Buffer is large enough for the total number of bytes read
+
+ @retval EFI_SUCCESS Command succeed.
+ @retval EFI_INVALID_PARAMETER The parameters specified are not valid.
+ @retval EFI_DEVICE_ERROR Device error, command aborts abnormally.
+**/
+EFI_STATUS
+EFIAPI
+SpiProtocolFlashReadSfdp (
+ IN PCH_SPI_PROTOCOL *This,
+ IN UINT8 ComponentNumber,
+ IN UINT32 Address,
+ IN UINT32 ByteCount,
+ OUT UINT8 *SfdpData
+ );
+
+/**
+ Read Jedec Id from the flash part.
+
+ @param[in] This Pointer to the PCH_SPI_PROTOCOL instance.
+ @param[in] ComponentNumber The Componen Number for chip select
+ @param[in] ByteCount Number of bytes in JedecId data portion of the SPI cycle, the data size is 3 typically
+ @param[out] JedecId The Pointer to caller-allocated buffer containing JEDEC ID received
+ It is the caller's responsibility to make sure Buffer is large enough for the total number of bytes read.
+
+ @retval EFI_SUCCESS Command succeed.
+ @retval EFI_INVALID_PARAMETER The parameters specified are not valid.
+ @retval EFI_DEVICE_ERROR Device error, command aborts abnormally.
+**/
+EFI_STATUS
+EFIAPI
+SpiProtocolFlashReadJedecId (
+ IN PCH_SPI_PROTOCOL *This,
+ IN UINT8 ComponentNumber,
+ IN UINT32 ByteCount,
+ OUT UINT8 *JedecId
+ );
+
+/**
+ Write the status register in the flash part.
+
+ @param[in] This Pointer to the PCH_SPI_PROTOCOL instance.
+ @param[in] ByteCount Number of bytes in Status data portion of the SPI cycle, the data size is 1 typically
+ @param[in] StatusValue The Pointer to caller-allocated buffer containing the value of Status register writing
+
+ @retval EFI_SUCCESS Command succeed.
+ @retval EFI_INVALID_PARAMETER The parameters specified are not valid.
+ @retval EFI_DEVICE_ERROR Device error, command aborts abnormally.
+**/
+EFI_STATUS
+EFIAPI
+SpiProtocolFlashWriteStatus (
+ IN PCH_SPI_PROTOCOL *This,
+ IN UINT32 ByteCount,
+ IN UINT8 *StatusValue
+ );
+
+/**
+ Read status register in the flash part.
+
+ @param[in] This Pointer to the PCH_SPI_PROTOCOL instance.
+ @param[in] ByteCount Number of bytes in Status data portion of the SPI cycle, the data size is 1 typically
+ @param[out] StatusValue The Pointer to caller-allocated buffer containing the value of Status register received.
+
+ @retval EFI_SUCCESS Command succeed.
+ @retval EFI_INVALID_PARAMETER The parameters specified are not valid.
+ @retval EFI_DEVICE_ERROR Device error, command aborts abnormally.
+**/
+EFI_STATUS
+EFIAPI
+SpiProtocolFlashReadStatus (
+ IN PCH_SPI_PROTOCOL *This,
+ IN UINT32 ByteCount,
+ OUT UINT8 *StatusValue
+ );
+
+/**
+ Get the SPI region base and size, based on the enum type
+
+ @param[in] This Pointer to the PCH_SPI_PROTOCOL instance.
+ @param[in] FlashRegionType The Flash Region type for for the base address which is listed in the Descriptor.
+ @param[out] BaseAddress The Flash Linear Address for the Region 'n' Base
+ @param[out] RegionSize The size for the Region 'n'
+
+ @retval EFI_SUCCESS Read success
+ @retval EFI_INVALID_PARAMETER Invalid region type given
+ @retval EFI_DEVICE_ERROR The region is not used
+**/
+EFI_STATUS
+EFIAPI
+SpiProtocolGetRegionAddress (
+ IN PCH_SPI_PROTOCOL *This,
+ IN FLASH_REGION_TYPE FlashRegionType,
+ OUT UINT32 *BaseAddress,
+ OUT UINT32 *RegionSize
+ );
+
+/**
+ Read PCH Soft Strap Values
+
+ @param[in] This Pointer to the PCH_SPI_PROTOCOL instance.
+ @param[in] SoftStrapAddr PCH Soft Strap address offset from FPSBA.
+ @param[in] ByteCount Number of bytes in SoftStrap data portion of the SPI cycle
+ @param[out] SoftStrapValue The Pointer to caller-allocated buffer containing PCH Soft Strap Value.
+ If the value of ByteCount is 0, the data type of SoftStrapValue should be UINT16 and SoftStrapValue will be PCH Soft Strap Length
+ It is the caller's responsibility to make sure Buffer is large enough for the total number of bytes read.
+
+ @retval EFI_SUCCESS Command succeed.
+ @retval EFI_INVALID_PARAMETER The parameters specified are not valid.
+ @retval EFI_DEVICE_ERROR Device error, command aborts abnormally.
+**/
+EFI_STATUS
+EFIAPI
+SpiProtocolReadPchSoftStrap (
+ IN PCH_SPI_PROTOCOL *This,
+ IN UINT32 SoftStrapAddr,
+ IN UINT32 ByteCount,
+ OUT VOID *SoftStrapValue
+ );
+
+/**
+ Read CPU Soft Strap Values
+
+ @param[in] This Pointer to the PCH_SPI_PROTOCOL instance.
+ @param[in] SoftStrapAddr CPU Soft Strap address offset from FCPUSBA.
+ @param[in] ByteCount Number of bytes in SoftStrap data portion of the SPI cycle.
+ @param[out] SoftStrapValue The Pointer to caller-allocated buffer containing CPU Soft Strap Value.
+ If the value of ByteCount is 0, the data type of SoftStrapValue should be UINT16 and SoftStrapValue will be PCH Soft Strap Length
+ It is the caller's responsibility to make sure Buffer is large enough for the total number of bytes read.
+
+ @retval EFI_SUCCESS Command succeed.
+ @retval EFI_INVALID_PARAMETER The parameters specified are not valid.
+ @retval EFI_DEVICE_ERROR Device error, command aborts abnormally.
+**/
+EFI_STATUS
+EFIAPI
+SpiProtocolReadCpuSoftStrap (
+ IN PCH_SPI_PROTOCOL *This,
+ IN UINT32 SoftStrapAddr,
+ IN UINT32 ByteCount,
+ OUT VOID *SoftStrapValue
+ );
+
+#endif
diff --git a/Silicon/Intel/TigerlakeSiliconPkg/IpBlock/Spi/IncludePrivate/Register/SpiRegs.h b/Silicon/Intel/TigerlakeSiliconPkg/IpBlock/Spi/IncludePrivate/Register/SpiRegs.h
new file mode 100644
index 0000000000..8e2029500c
--- /dev/null
+++ b/Silicon/Intel/TigerlakeSiliconPkg/IpBlock/Spi/IncludePrivate/Register/SpiRegs.h
@@ -0,0 +1,136 @@
+/** @file
+ Register names for PCH SPI device.
+
+ Conventions:
+
+ - Register definition format:
+ Prefix_[GenerationName]_[ComponentName]_SubsystemName_RegisterSpace_RegisterName
+ - 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 -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) 2021, Intel Corporation. All rights reserved.<BR>
+ SPDX-License-Identifier: BSD-2-Clause-Patent
+**/
+#ifndef _SPI_REGS_H_
+#define _SPI_REGS_H_
+
+//
+// SPI Registers
+//
+#define R_SPI_CFG_BAR0 0x10
+#define B_SPI_CFG_BAR0_MASK 0x0FFF
+
+#define R_SPI_CFG_BDE 0xD8
+
+#define R_SPI_CFG_BC 0xDC
+#define S_SPI_CFG_BC 4
+#define N_SPI_CFG_BC_ASE_BWP 11
+#define B_SPI_CFG_BC_ASE_BWP BIT11
+#define N_SPI_CFG_BC_ASYNC_SS 10
+#define B_SPI_CFG_BC_ASYNC_SS BIT10
+#define N_SPI_CFG_BC_SYNC_SS 8
+#define B_SPI_CFG_BC_SYNC_SS BIT8
+#define B_SPI_CFG_BC_BILD BIT7
+#define B_SPI_CFG_BC_BBS BIT6 ///< Boot BIOS strap
+#define N_SPI_CFG_BC_BBS 6
+#define V_SPI_CFG_BC_BBS_SPI 0 ///< Boot BIOS strapped to SPI
+#define B_SPI_CFG_BC_EISS BIT5 ///< Enable InSMM.STS
+#define B_SPI_CFG_BC_TSS BIT4
+#define B_SPI_CFG_BC_SRC (BIT3 | BIT2)
+#define N_SPI_CFG_BC_SRC 2
+#define V_SPI_CFG_BC_SRC_PREF_DIS_CACHE_DIS 0x01 ///< No prefetching and no caching
+#define B_SPI_CFG_BC_LE BIT1 ///< Lock Enable
+#define N_SPI_CFG_BC_BLE 1
+#define B_SPI_CFG_BC_WPD BIT0 ///< Write Protect Disable
+
+//
+// BIOS Flash Program Registers (based on SPI_BAR0)
+//
+#define R_SPI_MEM_HSFSC 0x04 ///< Hardware Sequencing Flash Status and Control Register(32bits)
+#define B_SPI_MEM_HSFSC_FDBC_MASK 0x3F000000 ///< Flash Data Byte Count ( <= 64), Count = (Value in this field) + 1.
+#define N_SPI_MEM_HSFSC_FDBC 24
+#define B_SPI_MEM_HSFSC_CYCLE_MASK 0x001E0000 ///< Flash Cycle.
+#define N_SPI_MEM_HSFSC_CYCLE 17
+#define V_SPI_MEM_HSFSC_CYCLE_READ 0 ///< Flash Cycle Read
+#define V_SPI_MEM_HSFSC_CYCLE_WRITE 2 ///< Flash Cycle Write
+#define V_SPI_MEM_HSFSC_CYCLE_4K_ERASE 3 ///< Flash Cycle 4K Block Erase
+#define V_SPI_MEM_HSFSC_CYCLE_64K_ERASE 4 ///< Flash Cycle 64K Sector Erase
+#define V_SPI_MEM_HSFSC_CYCLE_READ_SFDP 5 ///< Flash Cycle Read SFDP
+#define V_SPI_MEM_HSFSC_CYCLE_READ_JEDEC_ID 6 ///< Flash Cycle Read JEDEC ID
+#define V_SPI_MEM_HSFSC_CYCLE_WRITE_STATUS 7 ///< Flash Cycle Write Status
+#define V_SPI_MEM_HSFSC_CYCLE_READ_STATUS 8 ///< Flash Cycle Read Status
+#define B_SPI_MEM_HSFSC_CYCLE_FGO BIT16 ///< Flash Cycle Go.
+#define B_SPI_MEM_HSFSC_FLOCKDN BIT15 ///< Flash Configuration Lock-Down
+#define B_SPI_MEM_HSFSC_FDV BIT14 ///< Flash Descriptor Valid, once valid software can use hareware sequencing regs
+#define B_SPI_MEM_HSFSC_FDOPSS BIT13 ///< Flash Descriptor Override Pin-Strap Status
+#define B_SPI_MEM_HSFSC_WRSDIS BIT11 ///< Write Status Disable
+#define B_SPI_MEM_HSFSC_SAF_MODE_ACTIVE BIT7 ///< Indicates flash is attached either directly to the PCH via the SPI bus or EC/BMC
+#define B_SPI_MEM_HSFSC_SCIP BIT5 ///< SPI cycle in progress
+#define B_SPI_MEM_HSFSC_SAF_DLE BIT4 ///< SAF Data length error
+#define B_SPI_MEM_HSFSC_SAF_ERROR BIT3 ///< SAF Error
+#define B_SPI_MEM_HSFSC_AEL BIT2 ///< Access Error Log
+#define B_SPI_MEM_HSFSC_FCERR BIT1 ///< Flash Cycle Error
+#define B_SPI_MEM_HSFSC_FDONE BIT0 ///< Flash Cycle Done
+#define R_SPI_MEM_FADDR 0x08 ///< SPI Flash Address
+#define B_SPI_MEM_FADDR_MASK 0x07FFFFFF ///< SPI Flash Address Mask (0~26bit)
+#define R_SPI_MEM_DLOCK 0x0C ///< Discrete Lock Bits
+#define B_SPI_MEM_DLOCK_PR0LOCKDN BIT8 ///< PR0LOCKDN
+#define R_SPI_MEM_FDATA00 0x10 ///< SPI Data 00 (32 bits)
+#define R_SPI_MEM_FRAP 0x50 ///< Flash Region Access Permissions Register
+#define B_SPI_MEM_FRAP_BRWA_MASK 0x0000FF00 ///< BIOS Region Write Access MASK, Region0~7 - 0: Flash Descriptor; 1: BIOS; 2: ME; 3: GbE; 4: PlatformData
+#define N_SPI_MEM_FRAP_BRWA 8 ///< BIOS Region Write Access bit position
+#define B_SPI_MEM_FRAP_BRRA_MASK 0x000000FF ///< BIOS Region Read Access MASK, Region0~7 - 0: Flash Descriptor; 1: BIOS; 2: ME; 3: GbE; 4: PlatformData
+#define B_SPI_MEM_FRAP_BMRAG_MASK 0x00FF0000 ///< BIOS Master Read Access Grant
+#define B_SPI_MEM_FRAP_BMWAG_MASK 0xFF000000 ///< BIOS Master Write Access Grant
+#define R_SPI_MEM_FREG0_FLASHD 0x54 ///< Flash Region 0(Flash Descriptor)(32bits)
+#define R_SPI_MEM_FREG3_GBE 0x60 ///< Flash Region 3(GbE)(32bits)
+#define S_SPI_MEM_FREGX 4 ///< Size of Flash Region register
+#define B_SPI_MEM_FREGX_LIMIT_MASK 0x7FFF0000 ///< Flash Region Limit [30:16] represents [26:12], [11:0] are assumed to be FFFh
+#define N_SPI_MEM_FREGX_LIMIT 16 ///< Region limit bit position
+#define N_SPI_MEM_FREGX_LIMIT_REPR 12 ///< Region limit bit represents position
+#define B_SPI_MEM_FREGX_BASE_MASK 0x00007FFF ///< Flash Region Base, [14:0] represents [26:12]
+#define N_SPI_MEM_FREGX_BASE 0 ///< Region base bit position
+#define N_SPI_MEM_FREGX_BASE_REPR 12 ///< Region base bit represents position
+#define R_SPI_MEM_PR0 0x84 ///< Protected Region 0 Register
+#define S_SPI_MEM_PRX 4 ///< Protected Region X Register size
+#define B_SPI_MEM_PRX_WPE BIT31 ///< Write Protection Enable
+#define B_SPI_MEM_PRX_PRL_MASK 0x7FFF0000 ///< Protected Range Limit Mask, [30:16] here represents upper limit of address [26:12]
+#define N_SPI_MEM_PRX_PRL 16 ///< Protected Range Limit bit position
+#define B_SPI_MEM_PRX_RPE BIT15 ///< Read Protection Enable
+#define B_SPI_MEM_PRX_PRB_MASK 0x00007FFF ///< Protected Range Base Mask, [14:0] here represents base limit of address [26:12]
+#define N_SPI_MEM_PRX_PRB 0 ///< Protected Range Base bit position
+#define R_SPI_MEM_FDOC 0xB4 ///< Flash Descriptor Observability Control Register(32 bits)
+#define B_SPI_MEM_FDOC_FDSS_MASK (BIT14 | BIT13 | BIT12) ///< Flash Descritor Section Select
+#define V_SPI_MEM_FDOC_FDSS_FSDM 0x0000 ///< Flash Signature and Descriptor Map
+#define V_SPI_MEM_FDOC_FDSS_COMP 0x1000 ///< Component
+#define V_SPI_MEM_FDOC_FDSS_MSTR 0x3000 ///< Master
+#define B_SPI_MEM_FDOC_FDSI_MASK 0x0FFC ///< Flash Descriptor Section Index
+#define R_SPI_MEM_FDOD 0xB8 ///< Flash Descriptor Observability Data Register(32 bits)
+#define R_SPI_MEM_SFDP0_VSCC0 0xC4 ///< Vendor Specific Component Capabilities Register(32 bits)
+#define B_SPI_MEM_SFDPX_VSCCX_CPPTV BIT31 ///< Component Property Parameter Table Valid
+#define B_SPI_MEM_SFDP0_VSCC0_VCL BIT30 ///< Vendor Component Lock
+#define B_SPI_MEM_SFDPX_VSCCX_EO_64K BIT29 ///< 64k Erase valid (EO_64k_valid)
+#define R_SPI_MEM_SFDP1_VSCC1 0xC8 ///< Vendor Specific Component Capabilities Register(32 bits)
+
+#endif
diff --git a/Silicon/Intel/TigerlakeSiliconPkg/IpBlock/Spi/Library/PeiDxeSmmSpiAccessLib/PeiDxeSmmSpiAccessLib.inf b/Silicon/Intel/TigerlakeSiliconPkg/IpBlock/Spi/Library/PeiDxeSmmSpiAccessLib/PeiDxeSmmSpiAccessLib.inf
new file mode 100644
index 0000000000..bba0b1fef3
--- /dev/null
+++ b/Silicon/Intel/TigerlakeSiliconPkg/IpBlock/Spi/Library/PeiDxeSmmSpiAccessLib/PeiDxeSmmSpiAccessLib.inf
@@ -0,0 +1,33 @@
+## @file
+# Component description file for PCH SPI access library
+#
+# Copyright (c) 2021, Intel Corporation. All rights reserved.<BR>
+# SPDX-License-Identifier: BSD-2-Clause-Patent
+#
+##
+
+
+[Defines]
+INF_VERSION = 0x00010017
+BASE_NAME = PeiDxeSmmSpiAccessLib
+FILE_GUID = A6D4C05A-F6CB-46D5-4BA1-8C47B139DCA6
+VERSION_STRING = 1.0
+MODULE_TYPE = BASE
+LIBRARY_CLASS = SpiAccessLib
+
+
+[LibraryClasses]
+BaseLib
+IoLib
+DebugLib
+PciSegmentLib
+PchPciBdfLib
+PchPcrLib
+
+[Packages]
+MdePkg/MdePkg.dec
+TigerlakeSiliconPkg/SiPkg.dec
+
+
+[Sources]
+SpiAccessLib.c
diff --git a/Silicon/Intel/TigerlakeSiliconPkg/IpBlock/Spi/Library/PeiDxeSmmSpiAccessLib/SpiAccessLib.c b/Silicon/Intel/TigerlakeSiliconPkg/IpBlock/Spi/Library/PeiDxeSmmSpiAccessLib/SpiAccessLib.c
new file mode 100644
index 0000000000..c91b9aaf4d
--- /dev/null
+++ b/Silicon/Intel/TigerlakeSiliconPkg/IpBlock/Spi/Library/PeiDxeSmmSpiAccessLib/SpiAccessLib.c
@@ -0,0 +1,477 @@
+/** @file
+ SPI library for abstraction of SPI HW registers accesses
+
+ Copyright (c) 2021, Intel Corporation. All rights reserved.<BR>
+ SPDX-License-Identifier: BSD-2-Clause-Patent
+**/
+
+#include <Base.h>
+#include <Uefi/UefiBaseType.h>
+#include <IndustryStandard/Pci22.h>
+#include <Library/BaseLib.h>
+#include <Library/IoLib.h>
+#include <Library/DebugLib.h>
+#include <Library/PciSegmentLib.h>
+#include <Library/SpiAccessLib.h>
+#include <Library/PchPciBdfLib.h>
+#include <Library/PchPcrLib.h>
+#include <Register/SpiRegs.h>
+#include <Register/FlashRegs.h>
+#include <Register/PchRegs.h>
+#include <Register/PchPcrRegs.h>
+#include <Register/PchDmiRegs.h>
+
+/**
+ Checks if PCH SPI Controler is present and available
+
+ @retval TRUE PCH SPI controller is avaialable
+ @retval FALSE PCH SPI controller is not available
+**/
+BOOLEAN
+SpiIsControllerAvailable (
+ VOID
+ )
+{
+ //
+ // Checks for SPI controller
+ //
+ return (PciSegmentRead16 (SpiPciCfgBase () + PCI_VENDOR_ID_OFFSET) != 0xFFFF);
+}
+
+/**
+ Returns PCH SPI BAR0 value
+
+ @retval UINT32 PCH SPI BAR0 value
+**/
+UINT32
+SpiGetBar0 (
+ VOID
+ )
+{
+ UINT32 SpiBar0;
+
+ ASSERT (SpiIsControllerAvailable ());
+ SpiBar0 = PciSegmentRead32 (SpiPciCfgBase () + R_SPI_CFG_BAR0) & ~B_SPI_CFG_BAR0_MASK;
+ ASSERT (SpiBar0 != 0);
+
+ return SpiBar0;
+}
+
+/**
+ Reads given descriptor section and returns value
+
+ @param[in] UINT16 Descriptor section
+ @param[in] UINT16 Offset
+
+ @retval UINT32 Read value from a section under given offset
+**/
+STATIC
+UINT32
+SpiReadDescriptor (
+ IN UINT16 DescriptorSection,
+ IN UINT16 Offset
+ )
+{
+ UINT32 SpiBar0;
+ SpiBar0 = SpiGetBar0 ();
+
+ MmioWrite32 (SpiBar0 + R_SPI_MEM_FDOC, (DescriptorSection | Offset));
+ return MmioRead32 (SpiBar0 + R_SPI_MEM_FDOD);
+}
+
+/**
+ Returns descriptor signature
+
+ @retval UINT32 Descriptor signature
+**/
+UINT32
+SpiGetDescriptorSignature (
+ VOID
+ )
+{
+ //
+ // Read Descriptor offset 0x10 - To get Descriptor Signature
+ // Signature section 0x0000 + offset 0x0 which points to Descriptor offset 0x10
+ //
+ return SpiReadDescriptor (V_SPI_MEM_FDOC_FDSS_FSDM, 0x0);
+}
+
+/**
+ Returns supported features and R/W frequencies of Flash Component
+
+ @retval UINT32 Flash Component features descriptor
+**/
+UINT32
+SpiGetFlashComponentDescription (
+ VOID
+ )
+{
+ //
+ // Read Descriptor offset 0x30 - To get supported features and R/W frequencies
+ // Component section 0x1000 + offset 0x0 which points to Descriptor offset 0x30
+ //
+ return SpiReadDescriptor (V_SPI_MEM_FDOC_FDSS_COMP, 0x0);
+}
+
+/**
+ Returns number of Flash Components
+
+ @retval UINT32 Flash components number
+**/
+UINT32
+SpiGetFlashComponentsNumber (
+ VOID
+ )
+{
+ //
+ // Read Descriptor offset 0x14 - To get number of components
+ // Signature section 0x0000 + offset 0x4 which points to Descriptor offset 0x14
+ //
+ return ((SpiReadDescriptor (V_SPI_MEM_FDOC_FDSS_FSDM, R_FLASH_FDBAR_FLASH_MAP0) & B_FLASH_FDBAR_NC) >> N_FLASH_FDBAR_NC);
+}
+
+/**
+ Returns total Flash size with regards to number of flash components
+
+ @retval UINT32 Total Flash Memory size
+**/
+UINT32
+SpiGetTotalFlashSize (
+ VOID
+ )
+{
+ UINT32 Data32;
+ UINT32 ComponentsNumber;
+ UINT32 TotalFlashSize;
+
+ Data32 = SpiGetFlashComponentDescription ();
+ ComponentsNumber = SpiGetFlashComponentsNumber ();
+
+ TotalFlashSize = (V_FLASH_FLCOMP_COMP_512KB << ((UINT8) (Data32 & B_FLASH_FLCOMP_COMP0_MASK)));
+ if (ComponentsNumber == 1) {
+ TotalFlashSize += (V_FLASH_FLCOMP_COMP_512KB << ((UINT8) ((Data32 & B_FLASH_FLCOMP_COMP1_MASK) >> 4)));
+ }
+
+ return TotalFlashSize;
+}
+
+/**
+ Checks BIOS lock bits for proper value and checks if write protection is enabled
+ Expected vales are: LE bit set, EISS bit set and WPD bit cleared
+
+ @retval TRUE All protection bits are set correctly
+ @retval FALSE Not all protection bits had exepcted values
+**/
+BOOLEAN
+SpiIsWriteProtectionEnabled (
+ VOID
+ )
+{
+ UINT32 BiosControl;
+ BiosControl = PciSegmentRead32 (SpiPciCfgBase () + R_SPI_CFG_BC);
+
+ DEBUG ((DEBUG_INFO, "SPI BIOS CONTROL LE: %x\n", (BiosControl & B_SPI_CFG_BC_LE) != 0 ));
+ DEBUG ((DEBUG_INFO, "SPI BIOS CONTROL WPD: %x\n", (BiosControl & B_SPI_CFG_BC_WPD) != 0 ));
+ DEBUG ((DEBUG_INFO, "SPI BIOS CONTROL EISS: %x\n", (BiosControl & B_SPI_CFG_BC_EISS) != 0 ));
+
+ return (((BiosControl & B_SPI_CFG_BC_LE) != 0) &&
+ ((BiosControl & B_SPI_CFG_BC_WPD) == 0) &&
+ ((BiosControl & B_SPI_CFG_BC_EISS) != 0));
+}
+
+/**
+ Returns status of BIOS Interface Lockdown
+
+ @retval TRUE BIOS Interface Lockdown is enabled
+ @retval FALSE BIOS Interface Lockdown is disabled
+**/
+BOOLEAN
+SpiIsBiosInterfaceLockdownEnabled (
+ VOID
+ )
+{
+ return !!(PciSegmentRead32 (SpiPciCfgBase () + R_SPI_CFG_BC) & B_SPI_CFG_BC_BILD);
+}
+
+/**
+ Returns Flash Descriptor Override Pin Strap status
+
+ @retval TRUE Flash Descriptor override is enabled
+ @retval FALSE Flash Descriptor override is disabled
+**/
+BOOLEAN
+SpiIsFlashDescriptorOverrideEnabled (
+ VOID
+ )
+{
+ UINT32 SpiBar0;
+ SpiBar0 = SpiGetBar0 ();
+
+ return !!(MmioRead16 (SpiBar0 + R_SPI_MEM_HSFSC) & B_SPI_MEM_HSFSC_FDOPSS);
+}
+
+/**
+ Returns Flash Configuration Lock Down bit status
+
+ @retval TRUE Flash Configuration Lock Down bit is set
+ @retval FALSE Flash Configuration Lock Down bit is not set
+**/
+BOOLEAN
+SpiIsFlashConfigurationLockDownEnabled (
+ VOID
+ )
+{
+ UINT32 SpiBar0;
+ SpiBar0 = SpiGetBar0 ();
+
+ return !!(MmioRead16 (SpiBar0 + R_SPI_MEM_HSFSC) & B_SPI_MEM_HSFSC_FLOCKDN);
+}
+
+/**
+ Returns Top Swap functionality enable state
+
+ @retval TRUE Top Swap is enabled
+ @retval FALSE Top Swap is disabled
+**/
+BOOLEAN
+SpiIsTopSwapEnabled (
+ VOID
+ )
+{
+ return !!(PciSegmentRead32 (SpiPciCfgBase () + R_SPI_CFG_BC) & B_SPI_CFG_BC_TSS);
+}
+
+/**
+ Return Component Property Parameter Table for a given component number
+
+ @param[in] ComponentNumber SPI Component number
+ @param[out] CppTable Component Poperty Parameter Table value
+
+ @retval TRUE Vendor Specific Component Capabilities Register value was read
+ @reval FALSE Vendor Specific Component Capabilities Register value was not present
+**/
+BOOLEAN
+SpiGetComponentPropertyParameterTable (
+ IN UINT8 ComponentNumber,
+ OUT UINT32 *CppTable
+ )
+{
+ UINT32 SpiBar0;
+ UINT32 Data32;
+ SpiBar0 = SpiGetBar0 ();
+
+ //
+ // More than 2 components not supported
+ //
+ switch (ComponentNumber) {
+ case 0:
+ *CppTable = MmioRead32 (SpiBar0 + R_SPI_MEM_SFDP0_VSCC0);
+ return TRUE;
+ case 1:
+ Data32 = SpiReadDescriptor (V_SPI_MEM_FDOC_FDSS_FSDM, R_FLASH_FDBAR_FLASH_MAP0);
+ *CppTable = MmioRead32 (SpiBar0 + R_SPI_MEM_SFDP1_VSCC1);
+ return !!(Data32 & BIT8);
+ default:
+ return FALSE;
+ }
+}
+
+/**
+ Returns valid bit status in given Component Property Parameter Table
+
+ @param[in] CppTable Component Poperty Parameter Table value
+
+ @retval TRUE Valid bit is set
+ @reval FALSE Valid bit is not set
+**/
+BOOLEAN
+SpiIsCppValidBitSet (
+ IN UINT32 CppTable
+ )
+{
+ return !!(CppTable & B_SPI_MEM_SFDPX_VSCCX_CPPTV);
+}
+
+/**
+ Checks if Flash Descriptor is valid
+
+ @retval TRUE Flash Descriptor is valid
+ @retval FALSE Flash Descriptor is invalid
+**/
+BOOLEAN
+SpiIsFlashDescriptorValid (
+ VOID
+ )
+{
+ UINT32 SpiBar0;
+ SpiBar0 = SpiGetBar0 ();
+
+ return !!(MmioRead32 (SpiBar0 + R_SPI_MEM_HSFSC) & B_SPI_MEM_HSFSC_FDV);
+}
+
+/**
+ Reads and returns value from Flash Region Access Permissions Register (FRAP)
+
+ @retval UINT32 Flash Region Access Permissions Register value
+**/
+STATIC
+UINT32
+SpiGetFlashRegionAccessPermissions (
+ VOID
+ )
+{
+ return MmioRead32 (SpiGetBar0 () + R_SPI_MEM_FRAP);
+}
+
+/**
+ Returns masked BIOS Master Read Access
+
+ @retval UINT32 Already masked BIOS Master Read Access
+**/
+UINT32
+SpiGetMasterReadAccess (
+ VOID
+ )
+{
+ UINT32 Data32;
+ Data32 = SpiGetFlashRegionAccessPermissions () & B_SPI_MEM_FRAP_BMRAG_MASK;
+ DEBUG ((DEBUG_INFO, "BMRAG 0x%x\n", Data32));
+
+ return Data32;
+}
+
+/**
+ Returns masked BIOS Master Write Access
+
+ @retval UINT32 Already masked BIOS Master Write Access
+**/
+UINT32
+SpiGetMasterWriteAccess (
+ VOID
+ )
+{
+ UINT32 Data32;
+ Data32 = SpiGetFlashRegionAccessPermissions () & B_SPI_MEM_FRAP_BMWAG_MASK;
+ DEBUG ((DEBUG_INFO, "BMWAG 0x%x\n", Data32));
+
+ return Data32;
+}
+
+/**
+ Returns GbE Region Access rights
+
+ @retval UINT32 GbE Region access rights
+**/
+UINT32
+SpiGetGbeRegionAccess (
+ VOID
+ )
+{
+ UINT32 Data32;
+
+ Data32 = SpiReadDescriptor (V_SPI_MEM_FDOC_FDSS_MSTR, 0x8);
+ DEBUG ((DEBUG_INFO, "GbE Region Access 0x%x\n", Data32));
+
+ return Data32;
+}
+
+/**
+ Returns CSME region access rights
+
+ @retval UINT32 CSME Region Access rights
+**/
+UINT32
+SpiGetCsmeRegionAccess (
+ VOID
+ )
+{
+ UINT32 Data32;
+
+ Data32 = SpiReadDescriptor (V_SPI_MEM_FDOC_FDSS_MSTR, 0x4);
+ DEBUG ((DEBUG_INFO, "CSME Region Access 0x%x\n", Data32));
+
+ return Data32;
+}
+
+/**
+ Returns EC region access right
+
+ @retval UINT32 EC Region access rights
+**/
+UINT32
+SpiGetEcRegionAccess (
+ VOID
+ )
+{
+ UINT32 Data32;
+
+ Data32 = SpiReadDescriptor (V_SPI_MEM_FDOC_FDSS_MSTR, 0x10);
+ DEBUG ((DEBUG_INFO, "EC Region Access 0x%x\n", Data32));
+
+ return Data32;
+}
+
+/**
+ Checks if Slave Attached Flash (SAF) mode is active
+
+ @retval TRUE SAF mode is active
+ @retval FALSE SAF mode is not active
+**/
+BOOLEAN
+SpiIsSafModeActive (
+ VOID
+ )
+{
+ UINT32 SpiBar0;
+ SpiBar0 = SpiGetBar0 ();
+
+ return !!(MmioRead32 (SpiBar0 + R_SPI_MEM_HSFSC) & B_SPI_MEM_HSFSC_SAF_MODE_ACTIVE);
+}
+
+/**
+ Checks validity of GbE region
+
+ @retval TRUE GbE region is valid
+ @retval FALSE GbE regios in invalid
+**/
+BOOLEAN
+SpiIsGbeRegionValid (
+ VOID
+ )
+{
+ UINT32 SpiBar0;
+ SpiBar0 = SpiGetBar0 ();
+
+ if (MmioRead32 (SpiBar0 + R_SPI_MEM_FREG3_GBE) != B_SPI_MEM_FREGX_BASE_MASK) {
+ return TRUE;
+ }
+ return FALSE;
+}
+
+/**
+ Returns TRUE if BIOS Boot Strap is set to SPI
+
+ @retval TRUE BIOS Boot strap is set to SPI
+ @retval FALSE BIOS Boot strap is set to LPC/eSPI
+**/
+BOOLEAN
+SpiIsBiosBootFromSpi (
+ VOID
+ )
+{
+ return !!(((PciSegmentRead8 (SpiPciCfgBase () + R_SPI_CFG_BC) & B_SPI_CFG_BC_BBS) >> N_SPI_CFG_BC_BBS) == V_SPI_CFG_BC_BBS_SPI);
+}
+
+/**
+ Check SPI write status disable is set
+
+ @retval TRUE Write status disable is set
+ @retval FALSE Write status disable is not set
+**/
+BOOLEAN
+SpiIsWriteStatusDisable (
+ VOID
+ )
+{
+ return !!(MmioRead32 (SpiGetBar0 () + R_SPI_MEM_HSFSC) & B_SPI_MEM_HSFSC_WRSDIS);
+}
diff --git a/Silicon/Intel/TigerlakeSiliconPkg/IpBlock/Spi/LibraryPrivate/BaseSpiCommonLib/BaseSpiCommonLib.inf b/Silicon/Intel/TigerlakeSiliconPkg/IpBlock/Spi/LibraryPrivate/BaseSpiCommonLib/BaseSpiCommonLib.inf
new file mode 100644
index 0000000000..a1a5467745
--- /dev/null
+++ b/Silicon/Intel/TigerlakeSiliconPkg/IpBlock/Spi/LibraryPrivate/BaseSpiCommonLib/BaseSpiCommonLib.inf
@@ -0,0 +1,31 @@
+## @file
+# Component description file for the PchSpiCommonLib
+#
+# Copyright (c) 2021, Intel Corporation. All rights reserved.<BR>
+# SPDX-License-Identifier: BSD-2-Clause-Patent
+#
+##
+
+[Defines]
+ INF_VERSION = 0x00010005
+ BASE_NAME = BaseSpiCommonLib
+ FILE_GUID = A37CB67E-7D85-45B3-B07E-BF65BDB603E8
+ MODULE_TYPE = BASE
+ VERSION_STRING = 1.0
+ LIBRARY_CLASS = SpiCommonLib
+
+[Sources]
+ SpiCommon.c
+
+[Packages]
+ MdePkg/MdePkg.dec
+ TigerlakeSiliconPkg/SiPkg.dec
+
+[LibraryClasses]
+ IoLib
+ DebugLib
+ PmcLib
+ PchPciBdfLib
+ SpiAccessLib
+
+[Pcd]
diff --git a/Silicon/Intel/TigerlakeSiliconPkg/IpBlock/Spi/LibraryPrivate/BaseSpiCommonLib/SpiCommon.c b/Silicon/Intel/TigerlakeSiliconPkg/IpBlock/Spi/LibraryPrivate/BaseSpiCommonLib/SpiCommon.c
new file mode 100644
index 0000000000..954b349e7c
--- /dev/null
+++ b/Silicon/Intel/TigerlakeSiliconPkg/IpBlock/Spi/LibraryPrivate/BaseSpiCommonLib/SpiCommon.c
@@ -0,0 +1,1115 @@
+/** @file
+ PCH SPI Common Driver implements the SPI Host Controller Compatibility Interface.
+
+ Copyright (c) 2021, Intel Corporation. All rights reserved.<BR>
+ SPDX-License-Identifier: BSD-2-Clause-Patent
+**/
+#include <Uefi/UefiBaseType.h>
+#include <Library/BaseLib.h>
+#include <Library/IoLib.h>
+#include <Library/DebugLib.h>
+#include <Library/BaseMemoryLib.h>
+#include <IndustryStandard/Pci30.h>
+#include <Library/PmcLib.h>
+#include <Library/PciSegmentLib.h>
+#include <Protocol/Spi.h>
+#include <Library/SpiCommonLib.h>
+#include <Register/PchRegs.h>
+#include <Register/SpiRegs.h>
+#include <Register/FlashRegs.h>
+#include <Register/PmcRegs.h>
+#include <Library/PchPciBdfLib.h>
+#include <Library/SpiAccessLib.h>
+
+/**
+ Initialize an SPI protocol instance.
+
+ @param[in] SpiInstance Pointer to SpiInstance to initialize
+
+ @retval EFI_SUCCESS The protocol instance was properly initialized
+ @exception EFI_UNSUPPORTED The PCH is not supported by this module
+**/
+EFI_STATUS
+SpiProtocolConstructor (
+ IN SPI_INSTANCE *SpiInstance
+ )
+{
+ UINTN PchSpiBar0;
+ UINT32 Data32;
+ UINT16 Mdtba;
+ EFI_STATUS Status;
+
+ //
+ // Initialize the SPI protocol instance
+ //
+ SpiInstance->Signature = PCH_SPI_PRIVATE_DATA_SIGNATURE;
+ SpiInstance->Handle = NULL;
+ SpiInstance->SpiProtocol.Revision = PCH_SPI_SERVICES_REVISION;
+ SpiInstance->SpiProtocol.FlashRead = SpiProtocolFlashRead;
+ SpiInstance->SpiProtocol.FlashWrite = SpiProtocolFlashWrite;
+ SpiInstance->SpiProtocol.FlashErase = SpiProtocolFlashErase;
+ SpiInstance->SpiProtocol.FlashReadSfdp = SpiProtocolFlashReadSfdp;
+ SpiInstance->SpiProtocol.FlashReadJedecId = SpiProtocolFlashReadJedecId;
+ SpiInstance->SpiProtocol.FlashWriteStatus = SpiProtocolFlashWriteStatus;
+ SpiInstance->SpiProtocol.FlashReadStatus = SpiProtocolFlashReadStatus;
+ SpiInstance->SpiProtocol.GetRegionAddress = SpiProtocolGetRegionAddress;
+ SpiInstance->SpiProtocol.ReadPchSoftStrap = SpiProtocolReadPchSoftStrap;
+ SpiInstance->SpiProtocol.ReadCpuSoftStrap = SpiProtocolReadCpuSoftStrap;
+
+ SpiInstance->PchSpiBase = SpiPciCfgBase ();
+
+ SpiInstance->PchAcpiBase = PmcGetAcpiBase ();
+ ASSERT (SpiInstance->PchAcpiBase != 0);
+
+ PchSpiBar0 = PciSegmentRead32 (SpiInstance->PchSpiBase + R_SPI_CFG_BAR0) & ~(B_SPI_CFG_BAR0_MASK);
+ if (PchSpiBar0 == 0) {
+ DEBUG ((DEBUG_ERROR, "ERROR : PchSpiBar0 is invalid!\n"));
+ ASSERT (FALSE);
+ }
+
+ if ((MmioRead32 (PchSpiBar0 + R_SPI_MEM_HSFSC) & B_SPI_MEM_HSFSC_FDV) == 0) {
+ DEBUG ((DEBUG_ERROR, "ERROR : SPI Flash Signature invalid, cannot use the Hardware Sequencing registers!\n"));
+ ASSERT (FALSE);
+ }
+
+ //
+ // Get Region 0 - 7 read Permission bits, region 8 and above are not permitted.
+ //
+ SpiInstance->ReadPermission = MmioRead8 (PchSpiBar0 + R_SPI_MEM_FRAP) & B_SPI_MEM_FRAP_BRRA_MASK;
+ DEBUG ((DEBUG_INFO, "Flash Region read Permission : %0x\n", SpiInstance->ReadPermission));
+ //
+ // Get Region 0 - 7 write Permission bits, region 8 and above are not permitted.
+ //
+ SpiInstance->WritePermission = (UINT8) ((MmioRead16 (PchSpiBar0 + R_SPI_MEM_FRAP) &
+ B_SPI_MEM_FRAP_BRWA_MASK) >> N_SPI_MEM_FRAP_BRWA);
+ DEBUG ((DEBUG_INFO, "Flash Region write Permission : %0x\n", SpiInstance->WritePermission));
+
+ SpiInstance->SfdpVscc0Value = MmioRead32 (PchSpiBar0 + R_SPI_MEM_SFDP0_VSCC0);
+ DEBUG ((DEBUG_INFO, "Component 0 SFDP VSCC value : %0x\n", SpiInstance->SfdpVscc0Value));
+ SpiInstance->SfdpVscc1Value = MmioRead32 (PchSpiBar0 + R_SPI_MEM_SFDP1_VSCC1);
+ DEBUG ((DEBUG_INFO, "Component 1 SFDP VSCC value : %0x\n", SpiInstance->SfdpVscc1Value));
+
+ //
+ // Select to Flash Map 0 Register to get the number of flash Component
+ //
+ MmioAndThenOr32 (
+ PchSpiBar0 + R_SPI_MEM_FDOC,
+ (UINT32) (~(B_SPI_MEM_FDOC_FDSS_MASK | B_SPI_MEM_FDOC_FDSI_MASK)),
+ (UINT32) (V_SPI_MEM_FDOC_FDSS_FSDM | R_FLASH_FDBAR_FLASH_MAP0)
+ );
+
+ //
+ // Copy Zero based Number Of Components
+ //
+ SpiInstance->NumberOfComponents = (UINT8) ((MmioRead16 (PchSpiBar0 + R_SPI_MEM_FDOD) & B_FLASH_FDBAR_NC) >> N_FLASH_FDBAR_NC);
+ DEBUG ((DEBUG_INFO, "Component Number : %0x\n", SpiInstance->NumberOfComponents + 1));
+
+ MmioAndThenOr32 (
+ PchSpiBar0 + R_SPI_MEM_FDOC,
+ (UINT32) (~(B_SPI_MEM_FDOC_FDSS_MASK | B_SPI_MEM_FDOC_FDSI_MASK)),
+ (UINT32) (V_SPI_MEM_FDOC_FDSS_COMP | R_FLASH_FCBA_FLCOMP)
+ );
+
+ //
+ // Copy Component 0 Density
+ //
+ Data32 = MmioRead32 (PchSpiBar0 + R_SPI_MEM_FDOD);
+ if (SpiInstance->NumberOfComponents > 0) {
+ SpiInstance->Component1StartAddr = V_FLASH_FLCOMP_COMP_512KB <<
+ (Data32 & B_FLASH_FLCOMP_COMP0_MASK);
+ DEBUG ((DEBUG_INFO, "Component 1 StartAddr : %0x\n", SpiInstance->Component1StartAddr));
+ SpiInstance->TotalFlashSize = SpiInstance->Component1StartAddr +
+ (V_FLASH_FLCOMP_COMP_512KB <<
+ ((Data32 & B_FLASH_FLCOMP_COMP1_MASK) >>
+ N_FLASH_FLCOMP_COMP1));
+ } else {
+ SpiInstance->TotalFlashSize = V_FLASH_FLCOMP_COMP_512KB <<
+ (Data32 & B_FLASH_FLCOMP_COMP0_MASK);
+ }
+ DEBUG ((DEBUG_INFO, "Total Flash Size : %0x\n", SpiInstance->TotalFlashSize));
+
+ //
+ // Select FLASH_MAP1 to get Flash PCH Strap Base Address
+ //
+ MmioAndThenOr32 (
+ (PchSpiBar0 + R_SPI_MEM_FDOC),
+ (UINT32) (~(B_SPI_MEM_FDOC_FDSS_MASK | B_SPI_MEM_FDOC_FDSI_MASK)),
+ (UINT32) (V_SPI_MEM_FDOC_FDSS_FSDM | R_FLASH_FDBAR_FLASH_MAP1)
+ );
+ //
+ // Align FPSBA with address bits for the PCH Strap portion of flash descriptor
+ //
+ Data32 = MmioRead32 (PchSpiBar0 + R_SPI_MEM_FDOD);
+ SpiInstance->PchStrapBaseAddr = (UINT16) (((Data32 & B_FLASH_FDBAR_FPSBA)
+ >> N_FLASH_FDBAR_FPSBA)
+ << N_FLASH_FDBAR_FPSBA_REPR);
+ DEBUG ((DEBUG_INFO, "PchStrapBaseAddr : %0x\n", SpiInstance->PchStrapBaseAddr));
+ ASSERT (SpiInstance->PchStrapBaseAddr != 0);
+ //
+ // PCH Strap Length, [31:24] represents number of Dwords
+ //
+ SpiInstance->PchStrapSize = (UINT16) (((Data32 & B_FLASH_FDBAR_PCHSL)
+ >> N_FLASH_FDBAR_PCHSL)
+ * sizeof (UINT32));
+ DEBUG ((DEBUG_INFO, "PchStrapSize : %0x\n", SpiInstance->PchStrapSize));
+
+ //
+ // Select FLASH_MAP2 to get Flash CPU Strap Base Address
+ //
+ MmioAndThenOr32 (
+ (PchSpiBar0 + R_SPI_MEM_FDOC),
+ (UINT32) (~(B_SPI_MEM_FDOC_FDSS_MASK | B_SPI_MEM_FDOC_FDSI_MASK)),
+ (UINT32) (V_SPI_MEM_FDOC_FDSS_FSDM | R_FLASH_FDBAR_FLASH_MAP2)
+ );
+ //
+ // Align FPSBA with address bits for the CPU Strap portion of flash descriptor
+ //
+ Data32 = MmioRead32 (PchSpiBar0 + R_SPI_MEM_FDOD);
+ //
+ // CPU Strap Length, [23:16] represents number of Dwords
+ //
+ SpiInstance->CpuStrapSize = (UINT16) (((Data32 & B_FLASH_FDBAR_CPUSL)
+ >> N_FLASH_FDBAR_CPUSL)
+ * sizeof (UINT32));
+
+ //
+ // CPU Strap Address [11:2] represent offset from MDTBA
+ //
+ SpiInstance->CpuStrapBaseAddr = (UINT16) ((Data32 & B_FLASH_FDBAR_FCPUSBA) >> N_FLASH_FDBAR_FCPUSBA);
+ ASSERT (SpiInstance->CpuStrapBaseAddr != 0);
+
+ if (SpiInstance->CpuStrapBaseAddr != 0x300) {
+ Status = SpiProtocolFlashRead (&(SpiInstance->SpiProtocol), FlashRegionAll, R_FLASH_UMAP1, sizeof (Data32), (UINT8 *) (&Data32));
+ ASSERT_EFI_ERROR (Status);
+ Mdtba = (UINT16)(((Data32 & B_FLASH_UMAP1_MDTBA) >> N_FLASH_UMAP1_MDTBA) << N_FLASH_UMAP1_MDTBA_REPR);
+ DEBUG ((DEBUG_INFO, "Mdtba : %0x\n", Mdtba));
+ // Add MDTBA offset for final address of CPU Straps
+ SpiInstance->CpuStrapBaseAddr += Mdtba;
+ }
+
+ DEBUG ((DEBUG_INFO, "CpuStrapBaseAddr : %0x\n", SpiInstance->CpuStrapBaseAddr));
+ DEBUG ((DEBUG_INFO, "CpuStrapSize : %0x\n", SpiInstance->CpuStrapSize));
+
+ return EFI_SUCCESS;
+}
+
+/**
+ Delay for at least the request number of microseconds for Runtime usage.
+
+ @param[in] ABase Acpi base address
+ @param[in] Microseconds Number of microseconds to delay.
+
+**/
+VOID
+EFIAPI
+PchPmTimerStallRuntimeSafe (
+ IN UINT16 ABase,
+ IN UINTN Microseconds
+ )
+{
+ UINTN Ticks;
+ UINTN Counts;
+ UINTN CurrentTick;
+ UINTN OriginalTick;
+ UINTN RemainingTick;
+
+ if (Microseconds == 0) {
+ return;
+ }
+
+ OriginalTick = IoRead32 ((UINTN) (ABase + R_ACPI_IO_PM1_TMR)) & B_ACPI_IO_PM1_TMR_VAL;
+ CurrentTick = OriginalTick;
+
+ //
+ // The timer frequency is 3.579545 MHz, so 1 ms corresponds 3.58 clocks
+ //
+ Ticks = Microseconds * 358 / 100 + OriginalTick + 1;
+
+ //
+ // The loops needed by timer overflow
+ //
+ Counts = Ticks / V_ACPI_IO_PM1_TMR_MAX_VAL;
+
+ //
+ // Remaining clocks within one loop
+ //
+ RemainingTick = Ticks % V_ACPI_IO_PM1_TMR_MAX_VAL;
+
+ //
+ // not intend to use TMROF_STS bit of register PM1_STS, because this adds extra
+ // one I/O operation, and maybe generate SMI
+ //
+ while ((Counts != 0) || (RemainingTick > CurrentTick)) {
+ CurrentTick = IoRead32 ((UINTN) (ABase + R_ACPI_IO_PM1_TMR)) & B_ACPI_IO_PM1_TMR_VAL;
+ //
+ // Check if timer overflow
+ //
+ if ((CurrentTick < OriginalTick)) {
+ if (Counts != 0) {
+ Counts--;
+ } else {
+ //
+ // If timer overflow and Counts equ to 0, that means we already stalled more than
+ // RemainingTick, break the loop here
+ //
+ break;
+ }
+ }
+
+ OriginalTick = CurrentTick;
+ }
+}
+
+/**
+ Wait execution cycle to complete on the SPI interface.
+
+ @param[in] This The SPI protocol instance
+ @param[in] PchSpiBar0 Spi MMIO base address
+ @param[in] ErrorCheck TRUE if the SpiCycle needs to do the error check
+
+ @retval TRUE SPI cycle completed on the interface.
+ @retval FALSE Time out while waiting the SPI cycle to complete.
+ It's not safe to program the next command on the SPI interface.
+**/
+STATIC
+BOOLEAN
+WaitForSpiCycleComplete (
+ IN PCH_SPI_PROTOCOL *This,
+ IN UINTN PchSpiBar0,
+ IN BOOLEAN ErrorCheck
+ )
+{
+ UINT64 WaitTicks;
+ UINT64 WaitCount;
+ UINT32 Data32;
+ SPI_INSTANCE *SpiInstance;
+
+ SpiInstance = SPI_INSTANCE_FROM_SPIPROTOCOL (This);
+
+ //
+ // Convert the wait period allowed into to tick count
+ //
+ WaitCount = SPI_WAIT_TIME / SPI_WAIT_PERIOD;
+ //
+ // Wait for the SPI cycle to complete.
+ //
+ for (WaitTicks = 0; WaitTicks < WaitCount; WaitTicks++) {
+ Data32 = MmioRead32 (PchSpiBar0 + R_SPI_MEM_HSFSC);
+ if ((Data32 & B_SPI_MEM_HSFSC_SCIP) == 0) {
+ MmioWrite32 (PchSpiBar0 + R_SPI_MEM_HSFSC, B_SPI_MEM_HSFSC_FCERR | B_SPI_MEM_HSFSC_FDONE);
+ if (((Data32 & B_SPI_MEM_HSFSC_FCERR) != 0) && (ErrorCheck == TRUE)) {
+ return FALSE;
+ } else {
+ return TRUE;
+ }
+ }
+ PchPmTimerStallRuntimeSafe (SpiInstance->PchAcpiBase, SPI_WAIT_PERIOD);
+ }
+ return FALSE;
+}
+
+/**
+ This function sends the programmed SPI command to the slave device.
+
+ @param[in] This Pointer to the PCH_SPI_PROTOCOL instance.
+ @param[in] SpiRegionType The SPI Region type for flash cycle which is listed in the Descriptor
+ @param[in] FlashCycleType The Flash SPI cycle type list in HSFC (Hardware Sequencing Flash Control Register) register
+ @param[in] Address The Flash Linear Address must fall within a region for which BIOS has access permissions.
+ @param[in] ByteCount Number of bytes in the data portion of the SPI cycle.
+ @param[in,out] Buffer Pointer to caller-allocated buffer containing the dada received or sent during the SPI cycle.
+
+ @retval EFI_SUCCESS SPI command completes successfully.
+ @retval EFI_DEVICE_ERROR Device error, the command aborts abnormally.
+ @retval EFI_ACCESS_DENIED Some unrecognized or blocked command encountered in hardware sequencing mode
+ @retval EFI_INVALID_PARAMETER The parameters specified are not valid.
+**/
+STATIC
+EFI_STATUS
+SendSpiCmd (
+ IN PCH_SPI_PROTOCOL *This,
+ IN FLASH_REGION_TYPE FlashRegionType,
+ IN FLASH_CYCLE_TYPE FlashCycleType,
+ IN UINT32 Address,
+ IN UINT32 ByteCount,
+ IN OUT UINT8 *Buffer
+ )
+{
+ EFI_STATUS Status;
+ UINT32 Index;
+ SPI_INSTANCE *SpiInstance;
+ UINT64 SpiBaseAddress;
+ UINTN PchSpiBar0;
+ UINT32 HardwareSpiAddr;
+ UINT32 FlashRegionSize;
+ UINT32 SpiDataCount;
+ UINT32 FlashCycle;
+ UINT8 BiosCtlSave;
+ UINT32 SmiEnSave;
+ UINT16 ABase;
+ UINT32 HsfstsCtl;
+
+ //
+ // For flash write, there is a requirement that all CPU threads are in SMM
+ // before the flash protection is disabled.
+ //
+ if ((FlashCycleType == FlashCycleWrite) || (FlashCycleType == FlashCycleErase)) {
+ if (!IsSpiFlashWriteGranted ()) {
+ return EFI_ACCESS_DENIED;
+ }
+ }
+
+ Status = EFI_SUCCESS;
+ SpiInstance = SPI_INSTANCE_FROM_SPIPROTOCOL (This);
+ SpiBaseAddress = SpiInstance->PchSpiBase;
+ PchSpiBar0 = AcquireSpiBar0 (SpiInstance);
+ ABase = SpiInstance->PchAcpiBase;
+
+ //
+ // Disable SMIs to make sure normal mode flash access is not interrupted by an SMI
+ // whose SMI handler accesses flash (e.g. for error logging)
+ //
+ // *** NOTE: if the SMI_LOCK bit is set (i.e., PMC PCI Offset A0h [4]='1'),
+ // clearing B_GBL_SMI_EN will not have effect. In this situation, some other
+ // synchronization methods must be applied here or in the consumer of the
+ // SendSpiCmd. An example method is disabling the specific SMI sources
+ // whose SMI handlers access flash before flash cycle and re-enabling the SMI
+ // sources after the flash cycle .
+ //
+ SmiEnSave = IoRead32 ((UINTN) (ABase + R_ACPI_IO_SMI_EN));
+ IoWrite32 ((UINTN) (ABase + R_ACPI_IO_SMI_EN), SmiEnSave & (UINT32) (~B_ACPI_IO_SMI_EN_GBL_SMI));
+ BiosCtlSave = PciSegmentRead8 (SpiBaseAddress + R_SPI_CFG_BC) & B_SPI_CFG_BC_SRC;
+
+ //
+ // If it's write cycle, disable Prefetching, Caching and disable BIOS Write Protect
+ //
+ if ((FlashCycleType == FlashCycleWrite) ||
+ (FlashCycleType == FlashCycleErase)) {
+ Status = DisableBiosWriteProtect ();
+ if (EFI_ERROR (Status)) {
+ goto SendSpiCmdEnd;
+ }
+ PciSegmentAndThenOr8 (
+ SpiBaseAddress + R_SPI_CFG_BC,
+ (UINT8) (~B_SPI_CFG_BC_SRC),
+ (UINT8) (V_SPI_CFG_BC_SRC_PREF_DIS_CACHE_DIS << N_SPI_CFG_BC_SRC)
+ );
+ }
+ //
+ // Make sure it's safe to program the command.
+ //
+ if (!WaitForSpiCycleComplete (This, PchSpiBar0, FALSE)) {
+ Status = EFI_DEVICE_ERROR;
+ goto SendSpiCmdEnd;
+ }
+
+ //
+ // Check if Write Status isn't disabled in HW Sequencing
+ //
+ if (FlashCycleType == FlashCycleWriteStatus) {
+ HsfstsCtl = MmioRead32 (PchSpiBar0 + R_SPI_MEM_HSFSC);
+ if ((HsfstsCtl & B_SPI_MEM_HSFSC_WRSDIS) != 0) {
+ Status = EFI_ACCESS_DENIED;
+ goto SendSpiCmdEnd;
+ }
+ }
+
+ Status = SpiProtocolGetRegionAddress (This, FlashRegionType, &HardwareSpiAddr, &FlashRegionSize);
+ if (EFI_ERROR (Status)) {
+ goto SendSpiCmdEnd;
+ }
+ HardwareSpiAddr += Address;
+ if ((Address + ByteCount) > FlashRegionSize) {
+ Status = EFI_INVALID_PARAMETER;
+ goto SendSpiCmdEnd;
+ }
+
+ //
+ // Check for PCH SPI hardware sequencing required commands
+ //
+ FlashCycle = 0;
+ switch (FlashCycleType) {
+ case FlashCycleRead:
+ FlashCycle = (UINT32) (V_SPI_MEM_HSFSC_CYCLE_READ << N_SPI_MEM_HSFSC_CYCLE);
+ break;
+ case FlashCycleWrite:
+ FlashCycle = (UINT32) (V_SPI_MEM_HSFSC_CYCLE_WRITE << N_SPI_MEM_HSFSC_CYCLE);
+ break;
+ case FlashCycleErase:
+ if (((ByteCount % SIZE_4KB) != 0) ||
+ ((HardwareSpiAddr % SIZE_4KB) != 0)) {
+ ASSERT (FALSE);
+ Status = EFI_INVALID_PARAMETER;
+ goto SendSpiCmdEnd;
+ }
+ break;
+ case FlashCycleReadSfdp:
+ FlashCycle = (UINT32) (V_SPI_MEM_HSFSC_CYCLE_READ_SFDP << N_SPI_MEM_HSFSC_CYCLE);
+ break;
+ case FlashCycleReadJedecId:
+ FlashCycle = (UINT32) (V_SPI_MEM_HSFSC_CYCLE_READ_JEDEC_ID << N_SPI_MEM_HSFSC_CYCLE);
+ break;
+ case FlashCycleWriteStatus:
+ FlashCycle = (UINT32) (V_SPI_MEM_HSFSC_CYCLE_WRITE_STATUS << N_SPI_MEM_HSFSC_CYCLE);
+ break;
+ case FlashCycleReadStatus:
+ FlashCycle = (UINT32) (V_SPI_MEM_HSFSC_CYCLE_READ_STATUS << N_SPI_MEM_HSFSC_CYCLE);
+ break;
+ default:
+ //
+ // Unrecognized Operation
+ //
+ ASSERT (FALSE);
+ Status = EFI_INVALID_PARAMETER;
+ goto SendSpiCmdEnd;
+ break;
+ }
+
+ do {
+ SpiDataCount = ByteCount;
+ if ((FlashCycleType == FlashCycleRead) ||
+ (FlashCycleType == FlashCycleWrite) ||
+ (FlashCycleType == FlashCycleReadSfdp)) {
+ //
+ // Trim at 256 byte boundary per operation,
+ // - PCH SPI controller requires trimming at 4KB boundary
+ // - Some SPI chips require trimming at 256 byte boundary for write operation
+ // - Trimming has limited performance impact as we can read / write atmost 64 byte
+ // per operation
+ //
+ if (HardwareSpiAddr + ByteCount > ((HardwareSpiAddr + BIT8) &~(BIT8 - 1))) {
+ SpiDataCount = (((UINT32) (HardwareSpiAddr) + BIT8) &~(BIT8 - 1)) - (UINT32) (HardwareSpiAddr);
+ }
+ //
+ // Calculate the number of bytes to shift in/out during the SPI data cycle.
+ // Valid settings for the number of bytes duing each data portion of the
+ // PCH SPI cycles are: 0, 1, 2, 3, 4, 5, 6, 7, 8, 16, 24, 32, 40, 48, 56, 64
+ //
+ if (SpiDataCount >= 64) {
+ SpiDataCount = 64;
+ } else if ((SpiDataCount &~0x07) != 0) {
+ SpiDataCount = SpiDataCount &~0x07;
+ }
+ }
+ if (FlashCycleType == FlashCycleErase) {
+ if (((ByteCount / SIZE_64KB) != 0) &&
+ ((ByteCount % SIZE_64KB) == 0) &&
+ ((HardwareSpiAddr % SIZE_64KB) == 0)) {
+ if ((SpiInstance->NumberOfComponents == 0) ||
+ (HardwareSpiAddr < SpiInstance->Component1StartAddr)) {
+ //
+ // Check whether Component0 support 64k Erase
+ //
+ if ((SpiInstance->SfdpVscc0Value & B_SPI_MEM_SFDPX_VSCCX_EO_64K) != 0) {
+ SpiDataCount = SIZE_64KB;
+ } else {
+ SpiDataCount = SIZE_4KB;
+ }
+ } else {
+ //
+ // Check whether Component1 support 64k Erase
+ //
+ if ((SpiInstance->SfdpVscc1Value & B_SPI_MEM_SFDPX_VSCCX_EO_64K) != 0) {
+ SpiDataCount = SIZE_64KB;
+ } else {
+ SpiDataCount = SIZE_4KB;
+ }
+ }
+ } else {
+ SpiDataCount = SIZE_4KB;
+ }
+ if (SpiDataCount == SIZE_4KB) {
+ FlashCycle = (UINT32) (V_SPI_MEM_HSFSC_CYCLE_4K_ERASE << N_SPI_MEM_HSFSC_CYCLE);
+ } else {
+ FlashCycle = (UINT32) (V_SPI_MEM_HSFSC_CYCLE_64K_ERASE << N_SPI_MEM_HSFSC_CYCLE);
+ }
+ }
+ //
+ // If it's write cycle, load data into the SPI data buffer.
+ //
+ if ((FlashCycleType == FlashCycleWrite) || (FlashCycleType == FlashCycleWriteStatus)) {
+ if ((SpiDataCount & 0x07) != 0) {
+ //
+ // Use Byte write if Data Count is 0, 1, 2, 3, 4, 5, 6, 7
+ //
+ for (Index = 0; Index < SpiDataCount; Index++) {
+ MmioWrite8 (PchSpiBar0 + R_SPI_MEM_FDATA00 + Index, Buffer[Index]);
+ }
+ } else {
+ //
+ // Use Dword write if Data Count is 8, 16, 24, 32, 40, 48, 56, 64
+ //
+ for (Index = 0; Index < SpiDataCount; Index += sizeof (UINT32)) {
+ MmioWrite32 (PchSpiBar0 + R_SPI_MEM_FDATA00 + Index, *(UINT32 *) (Buffer + Index));
+ }
+ }
+ }
+
+ //
+ // Set the Flash Address
+ //
+ MmioWrite32 (
+ (PchSpiBar0 + R_SPI_MEM_FADDR),
+ (UINT32) (HardwareSpiAddr & B_SPI_MEM_FADDR_MASK)
+ );
+
+ //
+ // Set Data count, Flash cycle, and Set Go bit to start a cycle
+ //
+ MmioAndThenOr32 (
+ PchSpiBar0 + R_SPI_MEM_HSFSC,
+ (UINT32) (~(B_SPI_MEM_HSFSC_FDBC_MASK | B_SPI_MEM_HSFSC_CYCLE_MASK)),
+ (UINT32) ((((SpiDataCount - 1) << N_SPI_MEM_HSFSC_FDBC) & B_SPI_MEM_HSFSC_FDBC_MASK) | FlashCycle | B_SPI_MEM_HSFSC_CYCLE_FGO)
+ );
+ //
+ // end of command execution
+ //
+ // Wait the SPI cycle to complete.
+ //
+ if (!WaitForSpiCycleComplete (This, PchSpiBar0, TRUE)) {
+ ASSERT (FALSE);
+ Status = EFI_DEVICE_ERROR;
+ goto SendSpiCmdEnd;
+ }
+ //
+ // If it's read cycle, load data into the call's buffer.
+ //
+ if ((FlashCycleType == FlashCycleRead) ||
+ (FlashCycleType == FlashCycleReadSfdp) ||
+ (FlashCycleType == FlashCycleReadJedecId) ||
+ (FlashCycleType == FlashCycleReadStatus)) {
+ if ((SpiDataCount & 0x07) != 0) {
+ //
+ // Use Byte read if Data Count is 0, 1, 2, 3, 4, 5, 6, 7
+ //
+ for (Index = 0; Index < SpiDataCount; Index++) {
+ Buffer[Index] = MmioRead8 (PchSpiBar0 + R_SPI_MEM_FDATA00 + Index);
+ }
+ } else {
+ //
+ // Use Dword read if Data Count is 8, 16, 24, 32, 40, 48, 56, 64
+ //
+ for (Index = 0; Index < SpiDataCount; Index += sizeof (UINT32)) {
+ *(UINT32 *) (Buffer + Index) = MmioRead32 (PchSpiBar0 + R_SPI_MEM_FDATA00 + Index);
+ }
+ }
+ }
+
+ HardwareSpiAddr += SpiDataCount;
+ Buffer += SpiDataCount;
+ ByteCount -= SpiDataCount;
+ } while (ByteCount > 0);
+
+SendSpiCmdEnd:
+ //
+ // Restore the settings for SPI Prefetching and Caching and enable BIOS Write Protect
+ //
+ if ((FlashCycleType == FlashCycleWrite) ||
+ (FlashCycleType == FlashCycleErase)) {
+ EnableBiosWriteProtect ();
+ PciSegmentAndThenOr8 (
+ SpiBaseAddress + R_SPI_CFG_BC,
+ (UINT8) ~B_SPI_CFG_BC_SRC,
+ BiosCtlSave
+ );
+ }
+ //
+ // Restore SMIs.
+ //
+ IoWrite32 ((UINTN) (ABase + R_ACPI_IO_SMI_EN), SmiEnSave);
+
+ ReleaseSpiBar0 (SpiInstance);
+
+ return Status;
+}
+
+/**
+ Read data from the flash part.
+
+ @param[in] This Pointer to the PCH_SPI_PROTOCOL instance.
+ @param[in] FlashRegionType The Flash Region type for flash cycle which is listed in the Descriptor.
+ @param[in] Address The Flash Linear Address must fall within a region for which BIOS has access permissions.
+ @param[in] ByteCount Number of bytes in the data portion of the SPI cycle.
+ @param[out] Buffer The Pointer to caller-allocated buffer containing the dada received.
+ It is the caller's responsibility to make sure Buffer is large enough for the total number of bytes read.
+
+ @retval EFI_SUCCESS Command succeed.
+ @retval EFI_INVALID_PARAMETER The parameters specified are not valid.
+ @retval EFI_DEVICE_ERROR Device error, command aborts abnormally.
+**/
+EFI_STATUS
+EFIAPI
+SpiProtocolFlashRead (
+ IN PCH_SPI_PROTOCOL *This,
+ IN FLASH_REGION_TYPE FlashRegionType,
+ IN UINT32 Address,
+ IN UINT32 ByteCount,
+ OUT UINT8 *Buffer
+ )
+{
+ EFI_STATUS Status;
+
+ //
+ // Sends the command to the SPI interface to execute.
+ //
+ Status = SendSpiCmd (
+ This,
+ FlashRegionType,
+ FlashCycleRead,
+ Address,
+ ByteCount,
+ Buffer
+ );
+ return Status;
+}
+
+/**
+ Write data to the flash part.
+
+ @param[in] This Pointer to the PCH_SPI_PROTOCOL instance.
+ @param[in] FlashRegionType The Flash Region type for flash cycle which is listed in the Descriptor.
+ @param[in] Address The Flash Linear Address must fall within a region for which BIOS has access permissions.
+ @param[in] ByteCount Number of bytes in the data portion of the SPI cycle.
+ @param[in] Buffer Pointer to caller-allocated buffer containing the data sent during the SPI cycle.
+
+ @retval EFI_SUCCESS Command succeed.
+ @retval EFI_INVALID_PARAMETER The parameters specified are not valid.
+ @retval EFI_DEVICE_ERROR Device error, command aborts abnormally.
+**/
+EFI_STATUS
+EFIAPI
+SpiProtocolFlashWrite (
+ IN PCH_SPI_PROTOCOL *This,
+ IN FLASH_REGION_TYPE FlashRegionType,
+ IN UINT32 Address,
+ IN UINT32 ByteCount,
+ IN UINT8 *Buffer
+ )
+{
+ EFI_STATUS Status;
+
+ //
+ // Sends the command to the SPI interface to execute.
+ //
+ Status = SendSpiCmd (
+ This,
+ FlashRegionType,
+ FlashCycleWrite,
+ Address,
+ ByteCount,
+ Buffer
+ );
+ return Status;
+}
+
+/**
+ Erase some area on the flash part.
+
+ @param[in] This Pointer to the PCH_SPI_PROTOCOL instance.
+ @param[in] FlashRegionType The Flash Region type for flash cycle which is listed in the Descriptor.
+ @param[in] Address The Flash Linear Address must fall within a region for which BIOS has access permissions.
+ @param[in] ByteCount Number of bytes in the data portion of the SPI cycle.
+
+ @retval EFI_SUCCESS Command succeed.
+ @retval EFI_INVALID_PARAMETER The parameters specified are not valid.
+ @retval EFI_DEVICE_ERROR Device error, command aborts abnormally.
+**/
+EFI_STATUS
+EFIAPI
+SpiProtocolFlashErase (
+ IN PCH_SPI_PROTOCOL *This,
+ IN FLASH_REGION_TYPE FlashRegionType,
+ IN UINT32 Address,
+ IN UINT32 ByteCount
+ )
+{
+ EFI_STATUS Status;
+
+ //
+ // Sends the command to the SPI interface to execute.
+ //
+ Status = SendSpiCmd (
+ This,
+ FlashRegionType,
+ FlashCycleErase,
+ Address,
+ ByteCount,
+ NULL
+ );
+ return Status;
+}
+
+/**
+ Read SFDP data from the flash part.
+
+ @param[in] This Pointer to the PCH_SPI_PROTOCOL instance.
+ @param[in] ComponentNumber The Componen Number for chip select
+ @param[in] Address The starting byte address for SFDP data read.
+ @param[in] ByteCount Number of bytes in SFDP data portion of the SPI cycle
+ @param[out] SfdpData The Pointer to caller-allocated buffer containing the SFDP data received
+ It is the caller's responsibility to make sure Buffer is large enough for the total number of bytes read
+
+ @retval EFI_SUCCESS Command succeed.
+ @retval EFI_INVALID_PARAMETER The parameters specified are not valid.
+ @retval EFI_DEVICE_ERROR Device error, command aborts abnormally.
+ @retval EFI_UNSUPPORTED Unsupported operation with SAF Mode enabled
+**/
+EFI_STATUS
+EFIAPI
+SpiProtocolFlashReadSfdp (
+ IN PCH_SPI_PROTOCOL *This,
+ IN UINT8 ComponentNumber,
+ IN UINT32 Address,
+ IN UINT32 ByteCount,
+ OUT UINT8 *SfdpData
+ )
+{
+ SPI_INSTANCE *SpiInstance;
+ EFI_STATUS Status;
+ UINT32 FlashAddress;
+
+ if (SpiIsSafModeActive ()) {
+ DEBUG ((DEBUG_ERROR, "Unallowed call to %a while SAF Mode is active.\n", __FUNCTION__));
+ return EFI_UNSUPPORTED;
+ }
+
+ SpiInstance = SPI_INSTANCE_FROM_SPIPROTOCOL (This);
+ Status = EFI_SUCCESS;
+
+ if (ComponentNumber > SpiInstance->NumberOfComponents) {
+ ASSERT (FALSE);
+ return EFI_INVALID_PARAMETER;
+ }
+
+ FlashAddress = 0;
+ if (ComponentNumber == FlashComponent1) {
+ FlashAddress = SpiInstance->Component1StartAddr;
+ }
+ FlashAddress += Address;
+ //
+ // Sends the command to the SPI interface to execute.
+ //
+ Status = SendSpiCmd (
+ This,
+ FlashRegionAll,
+ FlashCycleReadSfdp,
+ FlashAddress,
+ ByteCount,
+ SfdpData
+ );
+ return Status;
+}
+
+/**
+ Read Jedec Id from the flash part.
+
+ @param[in] This Pointer to the PCH_SPI_PROTOCOL instance.
+ @param[in] ComponentNumber The Componen Number for chip select
+ @param[in] ByteCount Number of bytes in JedecId data portion of the SPI cycle, the data size is 3 typically
+ @param[out] JedecId The Pointer to caller-allocated buffer containing JEDEC ID received
+ It is the caller's responsibility to make sure Buffer is large enough for the total number of bytes read.
+
+ @retval EFI_SUCCESS Command succeed.
+ @retval EFI_INVALID_PARAMETER The parameters specified are not valid.
+ @retval EFI_DEVICE_ERROR Device error, command aborts abnormally.
+ @retval EFI_UNSUPPORTED Unsupported operation with SAF Mode enabled
+**/
+EFI_STATUS
+EFIAPI
+SpiProtocolFlashReadJedecId (
+ IN PCH_SPI_PROTOCOL *This,
+ IN UINT8 ComponentNumber,
+ IN UINT32 ByteCount,
+ OUT UINT8 *JedecId
+ )
+{
+ SPI_INSTANCE *SpiInstance;
+ EFI_STATUS Status;
+ UINT32 Address;
+
+ if (SpiIsSafModeActive ()) {
+ DEBUG ((DEBUG_ERROR, "Unallowed call to %a while SAF Mode is active.\n", __FUNCTION__));
+ return EFI_UNSUPPORTED;
+ }
+
+ SpiInstance = SPI_INSTANCE_FROM_SPIPROTOCOL (This);
+ Status = EFI_SUCCESS;
+
+ if (ComponentNumber > SpiInstance->NumberOfComponents) {
+ ASSERT (FALSE);
+ return EFI_INVALID_PARAMETER;
+ }
+
+ Address = 0;
+ if (ComponentNumber == FlashComponent1) {
+ Address = SpiInstance->Component1StartAddr;
+ }
+
+ //
+ // Sends the command to the SPI interface to execute.
+ //
+ Status = SendSpiCmd (
+ This,
+ FlashRegionAll,
+ FlashCycleReadJedecId,
+ Address,
+ ByteCount,
+ JedecId
+ );
+ return Status;
+}
+
+/**
+ Write the status register in the flash part.
+
+ @param[in] This Pointer to the PCH_SPI_PROTOCOL instance.
+ @param[in] ByteCount Number of bytes in Status data portion of the SPI cycle, the data size is 1 typically
+ @param[in] StatusValue The Pointer to caller-allocated buffer containing the value of Status register writing
+
+ @retval EFI_SUCCESS Command succeed.
+ @retval EFI_INVALID_PARAMETER The parameters specified are not valid.
+ @retval EFI_DEVICE_ERROR Device error, command aborts abnormally.
+ @retval EFI_UNSUPPORTED Unsupported operation with SAF Mode enabled
+**/
+EFI_STATUS
+EFIAPI
+SpiProtocolFlashWriteStatus (
+ IN PCH_SPI_PROTOCOL *This,
+ IN UINT32 ByteCount,
+ IN UINT8 *StatusValue
+ )
+{
+ EFI_STATUS Status;
+
+ if (SpiIsSafModeActive ()) {
+ DEBUG ((DEBUG_ERROR, "Unallowed call to %a while SAF Mode is active.\n", __FUNCTION__));
+ return EFI_UNSUPPORTED;
+ }
+
+ //
+ // Sends the command to the SPI interface to execute.
+ //
+ Status = SendSpiCmd (
+ This,
+ FlashRegionAll,
+ FlashCycleWriteStatus,
+ 0,
+ ByteCount,
+ StatusValue
+ );
+ return Status;
+}
+
+/**
+ Read status register in the flash part.
+
+ @param[in] This Pointer to the PCH_SPI_PROTOCOL instance.
+ @param[in] ByteCount Number of bytes in Status data portion of the SPI cycle, the data size is 1 typically
+ @param[out] StatusValue The Pointer to caller-allocated buffer containing the value of Status register received.
+
+ @retval EFI_SUCCESS Command succeed.
+ @retval EFI_INVALID_PARAMETER The parameters specified are not valid.
+ @retval EFI_DEVICE_ERROR Device error, command aborts abnormally.
+ @retval EFI_UNSUPPORTED Unsupported operation with SAF Mode enabled
+**/
+EFI_STATUS
+EFIAPI
+SpiProtocolFlashReadStatus (
+ IN PCH_SPI_PROTOCOL *This,
+ IN UINT32 ByteCount,
+ OUT UINT8 *StatusValue
+ )
+{
+ EFI_STATUS Status;
+
+ if (SpiIsSafModeActive ()) {
+ DEBUG ((DEBUG_ERROR, "Unallowed call to %a while SAF Mode is active.\n", __FUNCTION__));
+ return EFI_UNSUPPORTED;
+ }
+
+ //
+ // Sends the command to the SPI interface to execute.
+ //
+ Status = SendSpiCmd (
+ This,
+ FlashRegionAll,
+ FlashCycleReadStatus,
+ 0,
+ ByteCount,
+ StatusValue
+ );
+ return Status;
+}
+
+/**
+ Get the SPI region base and size, based on the enum type
+
+ @param[in] This Pointer to the PCH_SPI_PROTOCOL instance.
+ @param[in] FlashRegionType The Flash Region type for for the base address which is listed in the Descriptor.
+ @param[out] BaseAddress The Flash Linear Address for the Region 'n' Base
+ @param[out] RegionSize The size for the Region 'n'
+
+ @retval EFI_SUCCESS Read success
+ @retval EFI_INVALID_PARAMETER Invalid region type given
+ @retval EFI_DEVICE_ERROR The region is not used
+**/
+EFI_STATUS
+EFIAPI
+SpiProtocolGetRegionAddress (
+ IN PCH_SPI_PROTOCOL *This,
+ IN FLASH_REGION_TYPE FlashRegionType,
+ OUT UINT32 *BaseAddress,
+ OUT UINT32 *RegionSize
+ )
+{
+ SPI_INSTANCE *SpiInstance;
+ UINTN PchSpiBar0;
+ UINT32 ReadValue;
+
+ SpiInstance = SPI_INSTANCE_FROM_SPIPROTOCOL (This);
+
+ if (FlashRegionType >= FlashRegionMax) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ if (FlashRegionType == FlashRegionAll) {
+ *BaseAddress = 0;
+ *RegionSize = SpiInstance->TotalFlashSize;
+ return EFI_SUCCESS;
+ }
+
+ PchSpiBar0 = AcquireSpiBar0 (SpiInstance);
+ ReadValue = MmioRead32 (PchSpiBar0 + (R_SPI_MEM_FREG0_FLASHD + (S_SPI_MEM_FREGX * ((UINT32) FlashRegionType))));
+ ReleaseSpiBar0 (SpiInstance);
+
+ //
+ // If the region is not used, the Region Base is 7FFFh and Region Limit is 0000h
+ //
+ if (ReadValue == B_SPI_MEM_FREGX_BASE_MASK) {
+ return EFI_DEVICE_ERROR;
+ }
+ *BaseAddress = ((ReadValue & B_SPI_MEM_FREGX_BASE_MASK) >> N_SPI_MEM_FREGX_BASE) <<
+ N_SPI_MEM_FREGX_BASE_REPR;
+ //
+ // Region limit address Bits[11:0] are assumed to be FFFh
+ //
+ *RegionSize = ((((ReadValue & B_SPI_MEM_FREGX_LIMIT_MASK) >> N_SPI_MEM_FREGX_LIMIT) + 1) <<
+ N_SPI_MEM_FREGX_LIMIT_REPR) - *BaseAddress;
+
+ return EFI_SUCCESS;
+}
+
+/**
+ Read PCH Soft Strap Values
+
+ @param[in] This Pointer to the PCH_SPI_PROTOCOL instance.
+ @param[in] SoftStrapAddr PCH Soft Strap address offset from FPSBA.
+ @param[in] ByteCount Number of bytes in SoftStrap data portion of the SPI cycle
+ @param[out] SoftStrapValue The Pointer to caller-allocated buffer containing PCH Soft Strap Value.
+ If the value of ByteCount is 0, the data type of SoftStrapValue should be UINT16 and SoftStrapValue will be PCH Soft Strap Length
+ It is the caller's responsibility to make sure Buffer is large enough for the total number of bytes read.
+
+ @retval EFI_SUCCESS Command succeed.
+ @retval EFI_INVALID_PARAMETER The parameters specified are not valid.
+ @retval EFI_DEVICE_ERROR Device error, command aborts abnormally.
+**/
+EFI_STATUS
+EFIAPI
+SpiProtocolReadPchSoftStrap (
+ IN PCH_SPI_PROTOCOL *This,
+ IN UINT32 SoftStrapAddr,
+ IN UINT32 ByteCount,
+ OUT VOID *SoftStrapValue
+ )
+{
+ SPI_INSTANCE *SpiInstance;
+ UINT32 StrapFlashAddr;
+ EFI_STATUS Status;
+
+ SpiInstance = SPI_INSTANCE_FROM_SPIPROTOCOL (This);
+
+ if (ByteCount == 0) {
+ *(UINT16 *) SoftStrapValue = SpiInstance->PchStrapSize;
+ return EFI_SUCCESS;
+ }
+
+ if ((SoftStrapAddr + ByteCount) > (UINT32) SpiInstance->PchStrapSize) {
+ ASSERT (FALSE);
+ return EFI_INVALID_PARAMETER;
+ }
+
+ //
+ // PCH Strap Flash Address = FPSBA + RamAddr
+ //
+ StrapFlashAddr = SpiInstance->PchStrapBaseAddr + SoftStrapAddr;
+
+ //
+ // Read PCH Soft straps from using execute command
+ //
+ Status = SendSpiCmd (
+ This,
+ FlashRegionDescriptor,
+ FlashCycleRead,
+ StrapFlashAddr,
+ ByteCount,
+ SoftStrapValue
+ );
+ return Status;
+}
+
+/**
+ Read CPU Soft Strap Values
+
+ @param[in] This Pointer to the PCH_SPI_PROTOCOL instance.
+ @param[in] SoftStrapAddr CPU Soft Strap address offset from FCPUSBA.
+ @param[in] ByteCount Number of bytes in SoftStrap data portion of the SPI cycle.
+ @param[out] SoftStrapValue The Pointer to caller-allocated buffer containing CPU Soft Strap Value.
+ If the value of ByteCount is 0, the data type of SoftStrapValue should be UINT16 and SoftStrapValue will be PCH Soft Strap Length
+ It is the caller's responsibility to make sure Buffer is large enough for the total number of bytes read.
+
+ @retval EFI_SUCCESS Command succeed.
+ @retval EFI_INVALID_PARAMETER The parameters specified are not valid.
+ @retval EFI_DEVICE_ERROR Device error, command aborts abnormally.
+**/
+EFI_STATUS
+EFIAPI
+SpiProtocolReadCpuSoftStrap (
+ IN PCH_SPI_PROTOCOL *This,
+ IN UINT32 SoftStrapAddr,
+ IN UINT32 ByteCount,
+ OUT VOID *SoftStrapValue
+ )
+{
+ SPI_INSTANCE *SpiInstance;
+ UINT32 StrapFlashAddr;
+ EFI_STATUS Status;
+
+ SpiInstance = SPI_INSTANCE_FROM_SPIPROTOCOL (This);
+
+ if (ByteCount == 0) {
+ *(UINT16 *) SoftStrapValue = SpiInstance->CpuStrapSize;
+ return EFI_SUCCESS;
+ }
+
+ if ((SoftStrapAddr + ByteCount) > (UINT32) SpiInstance->CpuStrapSize) {
+ ASSERT (FALSE);
+ return EFI_INVALID_PARAMETER;
+ }
+
+ //
+ // CPU Strap Flash Address = FCPUSBA + RamAddr
+ //
+ StrapFlashAddr = SpiInstance->CpuStrapBaseAddr + SoftStrapAddr;
+
+ //
+ // Read Cpu Soft straps from using execute command
+ //
+ Status = SendSpiCmd (
+ This,
+ FlashRegionDescriptor,
+ FlashCycleRead,
+ StrapFlashAddr,
+ ByteCount,
+ SoftStrapValue
+ );
+ return Status;
+}
diff --git a/Silicon/Intel/TigerlakeSiliconPkg/IpBlock/Spi/LibraryPrivate/PeiDxeSmmSpiAccessPrivateLib/PeiDxeSmmSpiAccessPrivateLib.inf b/Silicon/Intel/TigerlakeSiliconPkg/IpBlock/Spi/LibraryPrivate/PeiDxeSmmSpiAccessPrivateLib/PeiDxeSmmSpiAccessPrivateLib.inf
new file mode 100644
index 0000000000..4e059494d8
--- /dev/null
+++ b/Silicon/Intel/TigerlakeSiliconPkg/IpBlock/Spi/LibraryPrivate/PeiDxeSmmSpiAccessPrivateLib/PeiDxeSmmSpiAccessPrivateLib.inf
@@ -0,0 +1,40 @@
+## @file
+# Component description file for PCH SPI access private library
+#
+# Copyright (c) 2021, Intel Corporation. All rights reserved.<BR>
+# SPDX-License-Identifier: BSD-2-Clause-Patent
+#
+##
+
+
+[Defines]
+INF_VERSION = 0x00010017
+BASE_NAME = PeiDxeSmmSpiAccessPrivateLib
+FILE_GUID = 2CD382D7-9928-C32A-601D-69797C618A6D
+VERSION_STRING = 1.0
+MODULE_TYPE = BASE
+LIBRARY_CLASS = SpiAccessPrivateLib
+
+
+[LibraryClasses]
+BaseLib
+IoLib
+DebugLib
+PciSegmentLib
+SpiAccessLib
+PcdLib
+S3BootScriptLib
+PchPciBdfLib
+
+
+[Packages]
+MdePkg/MdePkg.dec
+TigerlakeSiliconPkg/SiPkg.dec
+
+
+[Sources]
+SpiAccessPrivateLib.c
+
+
+[Pcd]
+gEfiMdePkgTokenSpaceGuid.PcdPciExpressBaseAddress
diff --git a/Silicon/Intel/TigerlakeSiliconPkg/IpBlock/Spi/LibraryPrivate/PeiDxeSmmSpiAccessPrivateLib/SpiAccessPrivateLib.c b/Silicon/Intel/TigerlakeSiliconPkg/IpBlock/Spi/LibraryPrivate/PeiDxeSmmSpiAccessPrivateLib/SpiAccessPrivateLib.c
new file mode 100644
index 0000000000..de1f3d3f86
--- /dev/null
+++ b/Silicon/Intel/TigerlakeSiliconPkg/IpBlock/Spi/LibraryPrivate/PeiDxeSmmSpiAccessPrivateLib/SpiAccessPrivateLib.c
@@ -0,0 +1,133 @@
+/** @file
+ SPI library for abstraction of SPI HW registers accesses
+
+ Copyright (c) 2021, Intel Corporation. All rights reserved.<BR>
+ SPDX-License-Identifier: BSD-2-Clause-Patent
+**/
+
+#include <Base.h>
+#include <Uefi/UefiBaseType.h>
+#include <Library/SpiAccessLib.h>
+#include <Library/PciSegmentLib.h>
+#include <Library/DebugLib.h>
+#include <Library/S3BootScriptLib.h>
+#include <Register/SpiRegs.h>
+#include <Register/PchRegs.h>
+#include <Register/PchPcrRegs.h>
+#include <Library/PchPciBdfLib.h>
+
+/**
+ Disable EISS (Enable InSMM.STS)
+**/
+VOID
+SpiDisableEiss (
+ VOID
+ )
+{
+ UINT64 SpiBaseAddress;
+ SpiBaseAddress = SpiPciCfgBase ();
+
+ ASSERT ((PciSegmentRead8 (SpiBaseAddress + R_SPI_CFG_BC) & B_SPI_CFG_BC_LE) == 0);
+
+ PciSegmentAnd8 (SpiBaseAddress + R_SPI_CFG_BC, (UINT8) ~(B_SPI_CFG_BC_EISS));
+}
+
+/**
+ Configure BiosLockEnable bit and BiosInterfaceLock bit according to policy setting.
+
+ @param[in] BiosLockEnable Policy for BiosLockEnable bit programming
+ @param[in] BiosInterfaceLock Policy for BiosInterfaceLock bit programming
+
+**/
+VOID
+SpiBiosLockEnableAndBiosInterfaceLockWithS3BootScript (
+ IN BOOLEAN BiosLockEnable,
+ IN BOOLEAN BiosInterfaceLock
+ )
+{
+ UINT64 SpiBaseAddress;
+ UINT8 SpiData8;
+
+ if (!BiosLockEnable && !BiosInterfaceLock) {
+ return;
+ }
+
+ SpiBaseAddress = SpiPciCfgBase ();
+
+ ///
+ /// PCH BIOS Spec Flash Security Recommendation
+ ///
+ /// BIOS needs to enable the BIOS Lock Enable (BLE) feature of the PCH by setting
+ /// SPI/eSPI/LPC PCI offset DCh[1] = 1b.
+ /// When this bit is set, attempts to write the Write Protect Disable (WPD) bit
+ /// in PCH will cause a SMI which will allow the BIOS to verify that the write is
+ /// from a valid source.
+ /// Remember that BIOS needs to set SPI/LPC/eSPI PCI Offset DC [0] = 0b to enable
+ /// BIOS region protection before exiting the SMI handler.
+ /// Also, TCO_EN bit needs to be set (SMI_EN Register, ABASE + 30h[13] = 1b) to keep
+ /// BLE feature enabled after booting to the OS.
+ /// Intel requires that BIOS enables the Lock Enable (LE) feature of the PCH to
+ /// ensure SMM protection of flash.
+ /// RC installs a default SMI handler that clears WPD.
+ /// There could be additional SMI handler to log such attempt if desired.
+ ///
+ /// BIOS needs to enable the "Enable in SMM.STS" (EISS) feature of the PCH by setting
+ /// SPI PCI offset DCh[5] = 1b for SPI or setting eSPI PCI offset DCh[5] = 1b for eSPI.
+ /// When this bit is set, the BIOS region is not writable until SMM sets the InSMM.STS bit,
+ /// to ensure BIOS can only be modified from SMM. Please refer to CPU BWG for more details
+ /// on InSMM.STS bit.
+ /// Intel requires that BIOS enables the Lock Enable (LE) feature of the PCH to ensure
+ /// SMM protection of flash.
+ /// SPI PCI offset DCh[1] = 1b for SPI or setting eSPI PCI offset DCh[1] = 1b for eSPI.
+ /// When this bit is set, EISS is locked down.
+ ///
+ SpiData8 = 0;
+ if (BiosLockEnable) {
+ SpiData8 |= B_SPI_CFG_BC_EISS | B_SPI_CFG_BC_LE;
+ }
+ ///
+ /// BIOS also needs to set the BIOS Interface Lock Down bit in multiple locations
+ /// (PCR[DMI] + 274Ch[0], LPC/eSPI PCI offset DCh[7] and SPI PCI offset DCh[7]).
+ /// (done in PchInit/Dxe/PchInit.c by PchDmiSetBiosLockDownWithS3BootScript ()) for PCR[DMI] 274Ch)
+ /// Setting these bits will prevent writes to the Top Swap bit (under their respective locations)
+ /// and the Boot BIOS Straps. Enabling this bit will mitigate malicious software
+ /// attempts to replace the system BIOS option ROM with its own code.
+ ///
+ if (BiosInterfaceLock) {
+ SpiData8 |= B_SPI_CFG_BC_BILD;
+ }
+
+ PciSegmentOr8 (SpiBaseAddress + R_SPI_CFG_BC, SpiData8);
+ S3BootScriptSaveMemWrite (
+ S3BootScriptWidthUint8,
+ PcdGet64 (PcdPciExpressBaseAddress) + SpiBaseAddress + R_SPI_CFG_BC,
+ 1,
+ (VOID *) (UINTN) (PcdGet64 (PcdPciExpressBaseAddress) + SpiBaseAddress + R_SPI_CFG_BC)
+ );
+ //
+ // Reads back for posted write to take effect
+ //
+ SpiData8 = PciSegmentRead8 (SpiBaseAddress + R_SPI_CFG_BC);
+ S3BootScriptSaveMemPoll (
+ S3BootScriptWidthUint8,
+ PcdGet64 (PcdPciExpressBaseAddress) + SpiBaseAddress + R_SPI_CFG_BC,
+ &SpiData8,
+ &SpiData8,
+ 1,
+ 1
+ );
+}
+
+/**
+ Clears BIOS Write Protect Disable bit
+**/
+VOID
+SpiClearBiosWriteProtectDisable (
+ VOID
+ )
+{
+ //
+ // Disable BIOSWE bit to protect BIOS
+ //
+ PciSegmentAnd8 (SpiPciCfgBase () + R_SPI_CFG_BC, (UINT8) ~B_SPI_CFG_BC_WPD);
+}
diff --git a/Silicon/Intel/TigerlakeSiliconPkg/IpBlock/Spi/Smm/Spi.c b/Silicon/Intel/TigerlakeSiliconPkg/IpBlock/Spi/Smm/Spi.c
new file mode 100644
index 0000000000..419eddaff3
--- /dev/null
+++ b/Silicon/Intel/TigerlakeSiliconPkg/IpBlock/Spi/Smm/Spi.c
@@ -0,0 +1,296 @@
+/** @file
+ PCH SPI SMM Driver implements the SPI Host Controller Compatibility Interface.
+
+ Copyright (c) 2021, Intel Corporation. All rights reserved.<BR>
+ SPDX-License-Identifier: BSD-2-Clause-Patent
+**/
+
+#include <Library/IoLib.h>
+#include <Library/DebugLib.h>
+#include <Library/UefiDriverEntryPoint.h>
+#include <Library/UefiBootServicesTableLib.h>
+#include <Library/BaseLib.h>
+#include <Library/BaseMemoryLib.h>
+#include <Library/SmmServicesTableLib.h>
+#include <Library/PciSegmentLib.h>
+#include <Protocol/Spi.h>
+#include <Protocol/SmmCpu.h>
+#include <Library/SpiCommonLib.h>
+#include <PchReservedResources.h>
+#include <Library/SmmPchPrivateLib.h>
+#include <Library/PchPciBdfLib.h>
+#include <IndustryStandard/Pci30.h>
+#include <Register/PchRegs.h>
+#include <Register/SpiRegs.h>
+
+//
+// Global variables
+//
+GLOBAL_REMOVE_IF_UNREFERENCED SPI_INSTANCE *mSpiInstance;
+GLOBAL_REMOVE_IF_UNREFERENCED EFI_SMM_CPU_PROTOCOL *mSmmCpuProtocol;
+//
+// mPchSpiResvMmioAddr keeps the reserved MMIO range assiged to SPI.
+// In SMM it always set back the reserved MMIO address to SPI BAR0 to ensure the MMIO range
+// won't overlap with SMRAM range, and trusted.
+//
+GLOBAL_REMOVE_IF_UNREFERENCED UINT32 mSpiResvMmioAddr;
+
+/**
+ <b>SPI Runtime SMM Module Entry Point</b>\n
+ - <b>Introduction</b>\n
+ The SPI SMM module provide a standard way for other modules to use the PCH SPI Interface in SMM.
+
+ - @pre
+ - EFI_SMM_BASE2_PROTOCOL
+ - Documented in System Management Mode Core Interface Specification .
+
+ - @result
+ The SPI SMM driver produces @link _PCH_SPI_PROTOCOL PCH_SPI_PROTOCOL @endlink with GUID
+ gPchSmmSpiProtocolGuid which is different from SPI RUNTIME driver.
+
+ - <b>Integration Check List</b>\n
+ - This driver supports Descriptor Mode only.
+ - This driver supports Hardware Sequence only.
+ - When using SMM SPI Protocol to perform flash access in an SMI handler,
+ and the SMI occurrence is asynchronous to normal mode code execution,
+ proper synchronization mechanism must be applied, e.g. disable SMI before
+ the normal mode SendSpiCmd() starts and re-enable SMI after
+ the normal mode SendSpiCmd() completes.
+ @note The implementation of SendSpiCmd() uses GBL_SMI_EN in
+ SMI_EN register (ABase + 30h) to disable and enable SMIs. But this may
+ not be effective as platform may well set the SMI_LOCK bit (i.e., PMC PCI Offset A0h [4]).
+ So the synchronization at caller level is likely needed.
+
+ @param[in] ImageHandle Image handle of this driver.
+ @param[in] SystemTable Global system service table.
+
+ @retval EFI_SUCCESS Initialization complete.
+ @exception EFI_UNSUPPORTED The chipset is unsupported by this driver.
+ @retval EFI_OUT_OF_RESOURCES Do not have enough resources to initialize the driver.
+ @retval EFI_DEVICE_ERROR Device error, driver exits abnormally.
+**/
+EFI_STATUS
+EFIAPI
+InstallPchSpi (
+ IN EFI_HANDLE ImageHandle,
+ IN EFI_SYSTEM_TABLE *SystemTable
+ )
+{
+ EFI_STATUS Status;
+
+ //
+ // Init PCH spi reserved MMIO address.
+ //
+ mSpiResvMmioAddr = PCH_SPI_BASE_ADDRESS;
+
+ ///
+ /// Allocate pool for SPI protocol instance
+ ///
+ Status = gSmst->SmmAllocatePool (
+ EfiRuntimeServicesData, /// MemoryType don't care
+ sizeof (SPI_INSTANCE),
+ (VOID **) &mSpiInstance
+ );
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+
+ if (mSpiInstance == NULL) {
+ return EFI_OUT_OF_RESOURCES;
+ }
+
+ ZeroMem ((VOID *) mSpiInstance, sizeof (SPI_INSTANCE));
+ ///
+ /// Initialize the SPI protocol instance
+ ///
+ Status = SpiProtocolConstructor (mSpiInstance);
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+ ///
+ /// Install the SMM PCH_SPI_PROTOCOL interface
+ ///
+ Status = gSmst->SmmInstallProtocolInterface (
+ &(mSpiInstance->Handle),
+ &gPchSmmSpiProtocolGuid,
+ EFI_NATIVE_INTERFACE,
+ &(mSpiInstance->SpiProtocol)
+ );
+ if (EFI_ERROR (Status)) {
+ gSmst->SmmFreePool (mSpiInstance);
+ return EFI_DEVICE_ERROR;
+ }
+
+ return EFI_SUCCESS;
+}
+
+/**
+ Acquire PCH spi mmio address.
+ If it is ever different from the preallocated address, reassign it back.
+ In SMM, it always override the BAR0 and returns the reserved MMIO range for SPI.
+
+ @param[in] SpiInstance Pointer to SpiInstance to initialize
+
+ @retval PchSpiBar0 return SPI MMIO address
+**/
+UINTN
+AcquireSpiBar0 (
+ IN SPI_INSTANCE *SpiInstance
+ )
+{
+ UINT32 SpiBar0;
+ //
+ // Save original SPI physical MMIO address
+ //
+ SpiBar0 = PciSegmentRead32 (SpiInstance->PchSpiBase + R_SPI_CFG_BAR0) & ~(B_SPI_CFG_BAR0_MASK);
+
+ if (SpiBar0 != mSpiResvMmioAddr) {
+ //
+ // Temporary disable MSE, and override with SPI reserved MMIO address, then enable MSE.
+ //
+ PciSegmentAnd8 (SpiInstance->PchSpiBase + PCI_COMMAND_OFFSET, (UINT8) ~EFI_PCI_COMMAND_MEMORY_SPACE);
+ PciSegmentWrite32 (SpiInstance->PchSpiBase + R_SPI_CFG_BAR0, mSpiResvMmioAddr);
+ PciSegmentOr8 (SpiInstance->PchSpiBase + PCI_COMMAND_OFFSET, EFI_PCI_COMMAND_MEMORY_SPACE);
+ }
+ //
+ // SPIBAR0 will be different before and after PCI enum so need to get it from SPI BAR0 reg.
+ //
+ return mSpiResvMmioAddr;
+}
+
+/**
+ Release pch spi mmio address. Do nothing.
+
+ @param[in] SpiInstance Pointer to SpiInstance to initialize
+
+ @retval None
+**/
+VOID
+ReleaseSpiBar0 (
+ IN SPI_INSTANCE *SpiInstance
+ )
+{
+}
+
+/**
+ This function is a hook for Spi to disable BIOS Write Protect
+
+ @retval EFI_SUCCESS The protocol instance was properly initialized
+ @retval EFI_ACCESS_DENIED The BIOS Region can only be updated in SMM phase
+
+**/
+EFI_STATUS
+EFIAPI
+DisableBiosWriteProtect (
+ VOID
+ )
+{
+ UINT64 SpiBaseAddress;
+
+ SpiBaseAddress = SpiPciCfgBase ();
+ // Write clear BC_SYNC_SS prior to change WPD from 0 to 1.
+ //
+ PciSegmentOr8 (
+ SpiBaseAddress + R_SPI_CFG_BC + 1,
+ (B_SPI_CFG_BC_SYNC_SS >> 8)
+ );
+ ///
+ /// Set BIOSWE bit (SPI PCI Offset DCh [0]) = 1b
+ /// Enable the access to the BIOS space for both read and write cycles
+ ///
+ PciSegmentOr8 (
+ SpiBaseAddress + R_SPI_CFG_BC,
+ B_SPI_CFG_BC_WPD
+ );
+
+ ///
+ /// PCH BIOS Spec Section 3.7 BIOS Region SMM Protection Enabling
+ /// If the following steps are implemented:
+ /// - Set the EISS bit (SPI PCI Offset DCh [5]) = 1b
+ /// - Follow the 1st recommendation in section 3.6
+ /// the BIOS Region can only be updated by following the steps bellow:
+ /// - Once all threads enter SMM
+ /// - Read memory location FED30880h OR with 00000001h, place the result in EAX,
+ /// and write data to lower 32 bits of MSR 1FEh (sample code available)
+ /// - Set BIOSWE bit (SPI PCI Offset DCh [0]) = 1b
+ /// - Modify BIOS Region
+ /// - Clear BIOSWE bit (SPI PCI Offset DCh [0]) = 0b
+ ///
+ if ((PciSegmentRead8 (SpiBaseAddress + R_SPI_CFG_BC) & B_SPI_CFG_BC_EISS) != 0) {
+ PchSetInSmmSts ();
+ }
+
+ return EFI_SUCCESS;
+}
+
+/**
+ This function is a hook for Spi to enable BIOS Write Protect
+**/
+VOID
+EFIAPI
+EnableBiosWriteProtect (
+ VOID
+ )
+{
+ UINT64 SpiBaseAddress;
+
+ SpiBaseAddress = SpiPciCfgBase ();
+ ///
+ /// Clear BIOSWE bit (SPI PCI Offset DCh [0]) = 0b
+ /// Disable the access to the BIOS space for write cycles
+ ///
+ PciSegmentAnd8 (
+ SpiBaseAddress + R_SPI_CFG_BC,
+ (UINT8) (~B_SPI_CFG_BC_WPD)
+ );
+
+ ///
+ /// Check if EISS bit is set
+ ///
+ if (((PciSegmentRead8 (SpiBaseAddress + R_SPI_CFG_BC)) & B_SPI_CFG_BC_EISS) == B_SPI_CFG_BC_EISS) {
+ PchClearInSmmSts ();
+ }
+}
+
+/**
+ Check if it's granted to do flash write.
+
+ @retval TRUE It's secure to do flash write.
+ @retval FALSE It's not secure to do flash write.
+**/
+BOOLEAN
+IsSpiFlashWriteGranted (
+ VOID
+ )
+{
+ EFI_STATUS Status;
+ UINT32 CpuIndex;
+ UINT64 ProcessorId;
+
+ if (mSmmCpuProtocol == NULL) {
+ Status = gSmst->SmmLocateProtocol (&gEfiSmmCpuProtocolGuid, NULL, (VOID **)&mSmmCpuProtocol);
+ ASSERT_EFI_ERROR (Status);
+ if (mSmmCpuProtocol == NULL) {
+ return TRUE;
+ }
+ }
+
+ for (CpuIndex = 0; CpuIndex < gSmst->NumberOfCpus; CpuIndex++) {
+ Status = mSmmCpuProtocol->ReadSaveState (
+ mSmmCpuProtocol,
+ sizeof (ProcessorId),
+ EFI_SMM_SAVE_STATE_REGISTER_PROCESSOR_ID,
+ CpuIndex,
+ &ProcessorId
+ );
+ //
+ // If the processor is in SMM at the time the SMI occurred,
+ // it will return success. Otherwise, EFI_NOT_FOUND is returned.
+ //
+ if (EFI_ERROR (Status)) {
+ return FALSE;
+ }
+ }
+
+ return TRUE;
+}
diff --git a/Silicon/Intel/TigerlakeSiliconPkg/IpBlock/Spi/Smm/SpiSmm.inf b/Silicon/Intel/TigerlakeSiliconPkg/IpBlock/Spi/Smm/SpiSmm.inf
new file mode 100644
index 0000000000..033134cea1
--- /dev/null
+++ b/Silicon/Intel/TigerlakeSiliconPkg/IpBlock/Spi/Smm/SpiSmm.inf
@@ -0,0 +1,47 @@
+## @file
+# Component description file for the SPI SMM driver.
+#
+# Copyright (c) 2021, Intel Corporation. All rights reserved.<BR>
+# SPDX-License-Identifier: BSD-2-Clause-Patent
+#
+##
+
+
+[Defines]
+INF_VERSION = 0x00010017
+BASE_NAME = SpiSmm
+FILE_GUID = 27F4917B-A707-4aad-9676-26DF168CBF0D
+VERSION_STRING = 1.0
+MODULE_TYPE = DXE_SMM_DRIVER
+PI_SPECIFICATION_VERSION = 1.10
+ENTRY_POINT = InstallPchSpi
+
+
+[LibraryClasses]
+DebugLib
+IoLib
+UefiDriverEntryPoint
+UefiBootServicesTableLib
+BaseLib
+SmmServicesTableLib
+SpiCommonLib
+SmmPchPrivateLib
+PchPciBdfLib
+
+[Packages]
+MdePkg/MdePkg.dec
+TigerlakeSiliconPkg/SiPkg.dec
+
+
+[Sources]
+Spi.c
+
+
+[Protocols]
+gPchSmmSpiProtocolGuid ## PRODUCES
+gEfiSmmCpuProtocolGuid ## CONSUMES
+
+
+[Depex]
+gEfiSmmBase2ProtocolGuid AND # This is for SmmServicesTableLib
+gEfiSmmCpuProtocolGuid # This is for CpuSmmDisableBiosWriteProtect()
--
2.24.0.windows.2
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