Re: [edk2-platforms/devel-MinPlatform][PATCH v4 3/3] ClevoOpenBoardPkg/N1xxWU: Write PEI debug messages to SPI flash

["Desimone, Nathaniel L" <nathaniel.l.desimone@intel.com>]

No change from V1 or V2 or V3.

Reviewed-by: Nate DeSimone <nathaniel.l.desimone@intel.com>

-----Original Message-----
From: Kubacki, Michael A 
Sent: Monday, April 1, 2019 7:47 PM
To: edk2-devel@lists.01.org
Cc: Sinha, Ankit <ankit.sinha@intel.com>; Desimone, Nathaniel L <nathaniel.l.desimone@intel.com>; Chiu, Chasel <chasel.chiu@intel.com>; Gao, Liming <liming.gao@intel.com>; Kinney, Michael D <michael.d.kinney@intel.com>
Subject: [edk2-platforms/devel-MinPlatform][PATCH v4 3/3] ClevoOpenBoardPkg/N1xxWU: Write PEI debug messages to SPI flash

Adds a new SerialPortLib instance to the ClevoOpenBoardPkg to support writing debug messages to a dedicated area on SPI flash. This is to enable closed chassis debug support on the system.

DXE and later phases after memory initialization are expected to use USB debug.

Cc: Ankit Sinha <ankit.sinha@intel.com>
Cc: Nate DeSimone <nathaniel.l.desimone@intel.com>
Cc: Chasel Chiu <chasel.chiu@intel.com>
Cc: Liming Gao <liming.gao@intel.com>
Cc: Michael D Kinney <michael.d.kinney@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Michael Kubacki <michael.a.kubacki@intel.com>
---
 Platform/Intel/ClevoOpenBoardPkg/OpenBoardPkg.dec  |   5 +
 .../ClevoOpenBoardPkg/N1xxWU/OpenBoardPkg.dsc      |  20 +-
 .../ClevoOpenBoardPkg/N1xxWU/OpenBoardPkg.fdf      |   4 +
 .../PeiSerialPortLibSpiFlash.inf                   |  56 ++++
 .../PeiSerialPortLibSpiFlash.c                     | 326 +++++++++++++++++++++
 5 files changed, 407 insertions(+), 4 deletions(-)  create mode 100644 Platform/Intel/ClevoOpenBoardPkg/Library/PeiSerialPortLibSpiFlash/PeiSerialPortLibSpiFlash.inf
 create mode 100644 Platform/Intel/ClevoOpenBoardPkg/Library/PeiSerialPortLibSpiFlash/PeiSerialPortLibSpiFlash.c

diff --git a/Platform/Intel/ClevoOpenBoardPkg/OpenBoardPkg.dec b/Platform/Intel/ClevoOpenBoardPkg/OpenBoardPkg.dec
index 87bbfb2240..aa457e64db 100644
--- a/Platform/Intel/ClevoOpenBoardPkg/OpenBoardPkg.dec
+++ b/Platform/Intel/ClevoOpenBoardPkg/OpenBoardPkg.dec
@@ -30,6 +30,7 @@ Features\Tbt\Include
 [Guids]
 gBoardModuleTokenSpaceGuid            =  {0x72d1fff7, 0xa42a, 0x4219, {0xb9, 0x95, 0x5a, 0x67, 0x53, 0x6e, 0xa4, 0x2a}}
 gTianoLogoGuid                        =  {0x7BB28B99, 0x61BB, 0x11D5, {0x9A, 0x5D, 0x00, 0x90, 0x27, 0x3F, 0xC1, 0x4D}}
+gSpiFlashDebugHobGuid                 =  {0xcaaaf418, 0x38a5, 0x4d49, {0xbe, 0x74, 0xe6, 0x06, 0xe4, 0x02, 0x6d, 0x25}}
 gTbtInfoHobGuid                       =  {0x74a81eaa, 0x033c, 0x4783, {0xbe, 0x2b, 0x84, 0x85, 0x74, 0xa6, 0x97, 0xb7}}
 gPlatformModuleTokenSpaceGuid         =  {0x69d13bf0, 0xaf91, 0x4d96, {0xaa, 0x9f, 0x21, 0x84, 0xc5, 0xce, 0x3b, 0xc0}}
 
@@ -64,6 +65,10 @@ gBoardModuleTokenSpaceGuid.PcdSwSmiDTbtEnumerate|0xF7|UINT8|0x000000110
 
 gBoardModuleTokenSpaceGuid.PcdSmcExtSmiBitPosition|0x01|UINT8|0x90000015
 
+gBoardModuleTokenSpaceGuid.PcdFlashNvDebugMessageBase|0x00000000|UINT32
+|0x90000030
+gBoardModuleTokenSpaceGuid.PcdFlashNvDebugMessageSize|0x00000000|UINT32
+|0x90000031
+gBoardModuleTokenSpaceGuid.PcdFlashNvDebugMessageOffset|0x00000000|UINT
+32|0x90000032
+
 [PcdsDynamic]
 
 # Board GPIO Table
diff --git a/Platform/Intel/ClevoOpenBoardPkg/N1xxWU/OpenBoardPkg.dsc b/Platform/Intel/ClevoOpenBoardPkg/N1xxWU/OpenBoardPkg.dsc
index 2116c48fc0..c43a30de34 100644
--- a/Platform/Intel/ClevoOpenBoardPkg/N1xxWU/OpenBoardPkg.dsc
+++ b/Platform/Intel/ClevoOpenBoardPkg/N1xxWU/OpenBoardPkg.dsc
@@ -116,10 +116,18 @@
 #
 !include $(PLATFORM_SI_PACKAGE)/SiPkgCommonLib.dsc
 
+[LibraryClasses.IA32.SEC]
+  
+SerialPortLib|MdePkg/Library/BaseSerialPortLibNull/BaseSerialPortLibNul
+l.inf
+  DebugLib|MdePkg/Library/BaseDebugLibNull/BaseDebugLibNull.inf
+  
+TestPointCheckLib|$(PLATFORM_PACKAGE)/Test/Library/TestPointCheckLib/Se
+cTestPointCheckLib.inf
+  
+SecBoardInitLib|$(PLATFORM_PACKAGE)/PlatformInit/Library/SecBoardInitLi
+bNull/SecBoardInitLibNull.inf
+
 [LibraryClasses.IA32]
   #
   # PEI phase common
   #
+  
+ SerialPortLib|$(PLATFORM_BOARD_PACKAGE)/Library/PeiSerialPortLibSpiFla
+ sh/PeiSerialPortLibSpiFlash.inf  
+ DebugLib|MdeModulePkg/Library/PeiDxeDebugLibReportStatusCode/PeiDxeDeb
+ ugLibReportStatusCode.inf
   FspWrapperPlatformLib|$(PLATFORM_PACKAGE)/FspWrapper/Library/PeiFspWrapperPlatformLib/PeiFspWrapperPlatformLib.inf
 !if $(TARGET) == DEBUG
   TestPointCheckLib|$(PLATFORM_PACKAGE)/Test/Library/TestPointCheckLib/PeiTestPointCheckLib.inf
@@ -138,10 +146,6 @@
 #
 !include $(PLATFORM_SI_PACKAGE)/SiPkgPeiLib.dsc
 
-[LibraryClasses.IA32.SEC]
-  TestPointCheckLib|$(PLATFORM_PACKAGE)/Test/Library/TestPointCheckLib/SecTestPointCheckLib.inf
-  SecBoardInitLib|$(PLATFORM_PACKAGE)/PlatformInit/Library/SecBoardInitLibNull/SecBoardInitLibNull.inf
-
 [LibraryClasses.X64]
   #
   # DXE phase common
@@ -185,6 +189,14 @@
 #
 !include $(PLATFORM_PACKAGE)/Include/Dsc/CorePeiInclude.dsc
 
+  #
+  # Core
+  #
+  MdeModulePkg/Universal/StatusCodeHandler/Pei/StatusCodeHandlerPei.inf {
+    <LibraryClasses>
+      DebugLib|MdePkg/Library/BaseDebugLibNull/BaseDebugLibNull.inf
+  }
+
   #
   # FSP wrapper SEC Core
   #
diff --git a/Platform/Intel/ClevoOpenBoardPkg/N1xxWU/OpenBoardPkg.fdf b/Platform/Intel/ClevoOpenBoardPkg/N1xxWU/OpenBoardPkg.fdf
index 95c1758ff3..7f3e965c75 100644
--- a/Platform/Intel/ClevoOpenBoardPkg/N1xxWU/OpenBoardPkg.fdf
+++ b/Platform/Intel/ClevoOpenBoardPkg/N1xxWU/OpenBoardPkg.fdf
@@ -136,6 +136,10 @@ gMinPlatformPkgTokenSpaceGuid.PcdFlashNvStorageFtwSpareOffset|gEfiMdeModulePkgTo
 gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageFtwSpareBase|gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageFtwSpareSize
 #NV_FTW_SPARE
 
+gBoardModuleTokenSpaceGuid.PcdFlashNvDebugMessageOffset|gBoardModuleTok
+enSpaceGuid.PcdFlashNvDebugMessageSize
+gBoardModuleTokenSpaceGuid.PcdFlashNvDebugMessageBase|gBoardModuleToken
+SpaceGuid.PcdFlashNvDebugMessageSize
+#DEBUG_MESSAGE_AREA
+
 gMinPlatformPkgTokenSpaceGuid.PcdFlashFvAdvancedOffset|gMinPlatformPkgTokenSpaceGuid.PcdFlashFvAdvancedSize
 gMinPlatformPkgTokenSpaceGuid.PcdFlashFvAdvancedBase|gMinPlatformPkgTokenSpaceGuid.PcdFlashFvAdvancedSize
 FV = FvAdvanced
diff --git a/Platform/Intel/ClevoOpenBoardPkg/Library/PeiSerialPortLibSpiFlash/PeiSerialPortLibSpiFlash.inf b/Platform/Intel/ClevoOpenBoardPkg/Library/PeiSerialPortLibSpiFlash/PeiSerialPortLibSpiFlash.inf
new file mode 100644
index 0000000000..c22201e033
--- /dev/null
+++ b/Platform/Intel/ClevoOpenBoardPkg/Library/PeiSerialPortLibSpiFlash/
+++ PeiSerialPortLibSpiFlash.inf
@@ -0,0 +1,56 @@
+### @file
+# Component description file for Serial I/O Port library to write to SPI flash.
+#
+# Copyright (c) 2019, Intel Corporation. All rights reserved.<BR> # # 
+This program and the accompanying materials are licensed and made 
+available under # the terms and conditions of the BSD License which accompanies this distribution.
+# The full text of the license may be found at # 
+http://opensource.org/licenses/bsd-license.php
+#
+# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, 
+# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+#
+##
+
+[Defines]
+  INF_VERSION                    = 0x00010005
+  BASE_NAME                      = PeiSerialPortLibFlash
+  FILE_GUID                      = 35A3BA89-04BE-409C-A3CA-DEF6B510F80F
+  VERSION_STRING                 = 1.1
+  MODULE_TYPE                    = PEIM
+  LIBRARY_CLASS                  = SerialPortLib|PEIM PEI_CORE
+#
+# The following information is for reference only and not required by the build tools.
+#
+# VALID_ARCHITECTURES = IA32 X64 IPF
+#
+
+[LibraryClasses]
+  BaseLib
+  BaseMemoryLib
+  HobLib
+  PcdLib
+  PeiServicesLib
+  SpiLib
+
+[Packages]
+  MdePkg/MdePkg.dec
+  MdeModulePkg/MdeModulePkg.dec
+  MinPlatformPkg/MinPlatformPkg.dec
+  KabylakeSiliconPkg/SiPkg.dec
+  ClevoOpenBoardPkg/OpenBoardPkg.dec
+
+[Sources]
+  PeiSerialPortLibSpiFlash.c
+
+[Ppis]
+  gPchSpiPpiGuid
+
+[Guids]
+  gSpiFlashDebugHobGuid
+
+[Pcd]
+  gMinPlatformPkgTokenSpaceGuid.PcdFlashAreaBaseAddress           ## CONSUMES
+  gBoardModuleTokenSpaceGuid.PcdFlashNvDebugMessageBase           ## CONSUMES
+  gBoardModuleTokenSpaceGuid.PcdFlashNvDebugMessageSize           ## CONSUMES
diff --git a/Platform/Intel/ClevoOpenBoardPkg/Library/PeiSerialPortLibSpiFlash/PeiSerialPortLibSpiFlash.c b/Platform/Intel/ClevoOpenBoardPkg/Library/PeiSerialPortLibSpiFlash/PeiSerialPortLibSpiFlash.c
new file mode 100644
index 0000000000..e36ff8bff8
--- /dev/null
+++ b/Platform/Intel/ClevoOpenBoardPkg/Library/PeiSerialPortLibSpiFlash/
+++ PeiSerialPortLibSpiFlash.c
@@ -0,0 +1,326 @@
+/** @file
+  Serial I/O Port library implementation for output to SPI flash
+
+Copyright (c) 2019, Intel Corporation. All rights reserved.<BR> This 
+program and the accompanying materials are licensed and made available 
+under the terms and conditions of the BSD License that accompanies this distribution.
+The full text of the license may be found at 
+http://opensource.org/licenses/bsd-license.php.
+
+THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, 
+WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+
+**/
+
+#include <Base.h>
+#include <Ppi/Spi.h>
+#include <Library/BaseLib.h>
+#include <Library/BaseMemoryLib.h>
+#include <Library/HobLib.h>
+#include <Library/PcdLib.h>
+#include <Library/PeiServicesLib.h>
+#include <Library/SerialPortLib.h>
+#include <Library/SpiLib.h>
+
+typedef struct {
+  PCH_SPI_PPI           *PchSpiPpi;
+  UINT32                CurrentWriteOffset;
+} SPI_FLASH_DEBUG_CONTEXT;
+
+/**
+  Update reference to the most recent PCH SPI PPI installed
+
+  @param PeiServices       An indirect pointer to the EFI_PEI_SERVICES table published by the PEI Foundation
+  @param NotifyDescriptor  Address of the notification descriptor data structure.
+  @param Ppi               Address of the PPI that was installed.
+
+  @retval EFI_SUCCESS      Successfully update the PCH SPI PPI reference
+  @retval EFI_NOT_FOUND    An error occurred locating a required interface
+  @retval EFI_NOT_SUPPORTED
+
+**/
+EFI_STATUS
+EFIAPI
+SpiPpiNotifyCallback (
+  IN EFI_PEI_SERVICES           **PeiServices,
+  IN EFI_PEI_NOTIFY_DESCRIPTOR  *NotifyDescriptor,
+  IN VOID                       *Ppi
+  )
+{
+  EFI_STATUS                Status;
+  EFI_HOB_GUID_TYPE         *GuidHob;
+  PCH_SPI_PPI               *PchSpiPpi;
+  SPI_FLASH_DEBUG_CONTEXT   *Context;
+
+  GuidHob = GetFirstGuidHob (&gSpiFlashDebugHobGuid);  if (GuidHob == 
+ NULL) {
+    return EFI_NOT_FOUND;
+  }
+  Context = GET_GUID_HOB_DATA (GuidHob);
+
+  Status =  PeiServicesLocatePpi (
+              &gPchSpiPpiGuid,
+              0,
+              NULL,
+              (VOID **) &PchSpiPpi
+              );
+  if (EFI_ERROR (Status)) {
+    return EFI_NOT_FOUND;
+  }
+
+  Context->PchSpiPpi = PchSpiPpi;
+
+  return EFI_SUCCESS;
+}
+
+EFI_PEI_NOTIFY_DESCRIPTOR mSpiPpiNotifyList[] = {
+  {
+    (EFI_PEI_PPI_DESCRIPTOR_NOTIFY_CALLBACK | EFI_PEI_PPI_DESCRIPTOR_TERMINATE_LIST),
+    &gPchSpiPpiGuid,
+    SpiPpiNotifyCallback
+  }
+};
+
+/**
+  Common function to write trace data to a chosen debug interface like
+  UART Serial device, USB Serial device or Trace Hub device
+
+  @param  Buffer           Point of data buffer which need to be writed.
+  @param  NumberOfBytes    Number of output bytes which are cached in Buffer.
+
+**/
+UINTN
+EFIAPI
+SerialPortWrite (
+  IN UINT8     *Buffer,
+  IN UINTN     NumberOfBytes
+  )
+{
+  EFI_STATUS                Status;
+  EFI_HOB_GUID_TYPE         *GuidHob;
+  SPI_FLASH_DEBUG_CONTEXT   *Context;
+  UINT32                    BytesWritten;
+  UINT32                    SourceBufferOffset;
+  UINT32                    NvMessageAreaSize;
+  UINT32                    LinearOffset;
+
+  BytesWritten       = NumberOfBytes;
+  SourceBufferOffset = 0;
+
+  NvMessageAreaSize = (UINT32) FixedPcdGet32 
+ (PcdFlashNvDebugMessageSize);
+
+  if (NumberOfBytes == 0 || NvMessageAreaSize == 0) {
+    return 0;
+  }
+  GuidHob = GetFirstGuidHob (&gSpiFlashDebugHobGuid);  if (GuidHob == 
+ NULL) {
+    return 0;
+  }
+  Context = GET_GUID_HOB_DATA (GuidHob);  if (Context == NULL || 
+ Context->PchSpiPpi == NULL || Context->CurrentWriteOffset >= NvMessageAreaSize) {
+    return 0;
+  }
+
+  if ((Context->CurrentWriteOffset + NumberOfBytes) / NvMessageAreaSize > 0) {
+    LinearOffset = (UINT32) (FixedPcdGet32 (PcdFlashNvDebugMessageBase) - FixedPcdGet32 (PcdFlashAreaBaseAddress));
+    Status =  Context->PchSpiPpi->FlashErase (
+                                    Context->PchSpiPpi,
+                                    FlashRegionBios,
+                                    LinearOffset,
+                                    NvMessageAreaSize
+                                    );
+    if (!EFI_ERROR (Status)) {
+      Context->CurrentWriteOffset = 0;
+    } else {
+      return 0;
+    }
+  }
+
+  if (NumberOfBytes > NvMessageAreaSize) {
+    BytesWritten = NvMessageAreaSize;
+    SourceBufferOffset = NumberOfBytes - NvMessageAreaSize;  }
+
+  LinearOffset = (FixedPcdGet32 (PcdFlashNvDebugMessageBase) + 
+ Context->CurrentWriteOffset) - FixedPcdGet32 
+ (PcdFlashAreaBaseAddress);
+
+  Status =  Context->PchSpiPpi->FlashWrite (
+                                  Context->PchSpiPpi,
+                                  FlashRegionBios,
+                                  LinearOffset,
+                                  BytesWritten,
+                                  (UINT8 *) &Buffer[SourceBufferOffset]
+                                  );
+  if (!EFI_ERROR (Status)) {
+    Context->CurrentWriteOffset += BytesWritten;
+    return BytesWritten;
+  }
+
+  return 0;
+}
+
+/**
+  Common function to Read data from UART serial device, USB serial device and save the datas in buffer.
+
+  @param  Buffer           Point of data buffer which need to be writed.
+  @param  NumberOfBytes    Number of output bytes which are cached in Buffer.
+
+  @retval 0                Read data failed, no data is to be read.
+  @retval >0               Actual number of bytes read from debug device.
+
+**/
+UINTN
+EFIAPI
+SerialPortRead (
+  OUT UINT8     *Buffer,
+  IN  UINTN     NumberOfBytes
+)
+{
+  return 0;
+}
+
+/**
+  Polls a serial device to see if there is any data waiting to be read.
+
+  Polls a serial device to see if there is any data waiting to be read.
+  If there is data waiting to be read from the serial device, then TRUE is returned.
+  If there is no data waiting to be read from the serial device, then FALSE is returned.
+
+  @retval TRUE             Data is waiting to be read from the serial device.
+  @retval FALSE            There is no data waiting to be read from the serial device.
+
+**/
+BOOLEAN
+EFIAPI
+SerialPortPoll (
+  VOID
+  )
+{
+  return FALSE;
+}
+
+/**
+  Sets the control bits on a serial device.
+
+  @param Control                Sets the bits of Control that are settable.
+
+  @retval RETURN_SUCCESS        The new control bits were set on the serial device.
+  @retval RETURN_UNSUPPORTED    The serial device does not support this operation.
+  @retval RETURN_DEVICE_ERROR   The serial device is not functioning correctly.
+
+**/
+RETURN_STATUS
+EFIAPI
+SerialPortSetControl (
+  IN UINT32 Control
+  )
+{
+  return EFI_UNSUPPORTED;
+}
+
+/**
+  Retrieve the status of the control bits on a serial device.
+
+  @param Control                A pointer to return the current control signals from the serial device.
+
+  @retval RETURN_SUCCESS        The control bits were read from the serial device.
+  @retval RETURN_UNSUPPORTED    The serial device does not support this operation.
+  @retval RETURN_DEVICE_ERROR   The serial device is not functioning correctly.
+
+**/
+RETURN_STATUS
+EFIAPI
+SerialPortGetControl (
+  OUT UINT32 *Control
+  )
+{
+  return EFI_UNSUPPORTED;
+}
+
+/**
+  Sets the baud rate, receive FIFO depth, transmit/receice time out, 
+parity,
+  data bits, and stop bits on a serial device.
+
+  @param BaudRate           The requested baud rate. A BaudRate value of 0 will use the
+                            device's default interface speed.
+                            On output, the value actually set.
+  @param ReveiveFifoDepth   The requested depth of the FIFO on the receive side of the
+                            serial interface. A ReceiveFifoDepth value of 0 will use
+                            the device's default FIFO depth.
+                            On output, the value actually set.
+  @param Timeout            The requested time out for a single character in microseconds.
+                            This timeout applies to both the transmit and receive side of the
+                            interface. A Timeout value of 0 will use the device's default time
+                            out value.
+                            On output, the value actually set.
+  @param Parity             The type of parity to use on this serial device. A Parity value of
+                            DefaultParity will use the device's default parity value.
+                            On output, the value actually set.
+  @param DataBits           The number of data bits to use on the serial device. A DataBits
+                            vaule of 0 will use the device's default data bit setting.
+                            On output, the value actually set.
+  @param StopBits           The number of stop bits to use on this serial device. A StopBits
+                            value of DefaultStopBits will use the device's default number of
+                            stop bits.
+                            On output, the value actually set.
+
+  @retval RETURN_SUCCESS            The new attributes were set on the serial device.
+  @retval RETURN_UNSUPPORTED        The serial device does not support this operation.
+  @retval RETURN_INVALID_PARAMETER  One or more of the attributes has an unsupported value.
+  @retval RETURN_DEVICE_ERROR       The serial device is not functioning correctly.
+
+**/
+RETURN_STATUS
+EFIAPI
+SerialPortSetAttributes (
+  IN OUT UINT64             *BaudRate,
+  IN OUT UINT32             *ReceiveFifoDepth,
+  IN OUT UINT32             *Timeout,
+  IN OUT EFI_PARITY_TYPE    *Parity,
+  IN OUT UINT8              *DataBits,
+  IN OUT EFI_STOP_BITS_TYPE *StopBits
+  )
+{
+  return EFI_UNSUPPORTED;
+}
+
+/**
+  Initialize the serial device hardware.
+
+  If no initialization is required, then return RETURN_SUCCESS.
+  If the serial device was successfully initialized, then return RETURN_SUCCESS.
+  If the serial device could not be initialized, then return RETURN_DEVICE_ERROR.
+
+  @retval RETURN_SUCCESS        The serial device was initialized.
+  @retval RETURN_DEVICE_ERROR   The serial device could not be initialized.
+
+**/
+RETURN_STATUS
+EFIAPI
+SerialPortInitialize (
+  VOID
+  )
+{
+  EFI_STATUS                Status;
+  SPI_FLASH_DEBUG_CONTEXT   *Context;
+
+  Context = (SPI_FLASH_DEBUG_CONTEXT *) BuildGuidHob 
+ (&gSpiFlashDebugHobGuid, sizeof (SPI_FLASH_DEBUG_CONTEXT));  if (Context == NULL) {
+    return EFI_DEVICE_ERROR;
+  }
+  ZeroMem ((VOID *) Context, sizeof (SPI_FLASH_DEBUG_CONTEXT));
+
+  Status = PeiServicesNotifyPpi (&mSpiPpiNotifyList[0]);  if (EFI_ERROR 
+ (Status)) {
+    return EFI_DEVICE_ERROR;
+  }
+
+  //
+  // Perform silicon specific initialization required to enable write to SPI flash.
+  //
+  Status = SpiServiceInit ();
+  if (EFI_ERROR (Status)) {
+    Status = EFI_DEVICE_ERROR;
+  }
+
+  return Status;
+}
--
2.16.2.windows.1