Code scrub for PeiCore module.

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@5558 6f19259b-4bc3-4df7-8a09-765794883524

11 files changed, 91 insertions, 95 deletions

diff --git a/MdeModulePkg/Core/Pei/Dependency/Dependency.c b/MdeModulePkg/Core/Pei/Dependency/Dependency.c
index 9ce8b4a34d..cbdbe35b1e 100644
--- a/MdeModulePkg/Core/Pei/Dependency/Dependency.c
+++ b/MdeModulePkg/Core/Pei/Dependency/Dependency.c
@@ -229,7 +229,6 @@ PeimDispatchReadiness (
         // The grammar should never arrive here

         //

         return FALSE;

-        break;

     }

   }

 }

diff --git a/MdeModulePkg/Core/Pei/Dispatcher/Dispatcher.c b/MdeModulePkg/Core/Pei/Dispatcher/Dispatcher.c
index f18e954f2a..53bbecd5bc 100644
--- a/MdeModulePkg/Core/Pei/Dispatcher/Dispatcher.c
+++ b/MdeModulePkg/Core/Pei/Dispatcher/Dispatcher.c
@@ -481,11 +481,19 @@ PeiDispatcher (
               // CAUTION: The new base is computed accounding to gap of new stack.

               //

               NewPermenentMemoryBase = Private->PhysicalMemoryBegin + StackGap;

+              

+              //

+              // Caculate stack offset and heap offset between CAR and new permement 

+              // memory seperately.

+              //

               StackOffset            = (UINTN) NewPermenentMemoryBase - (UINTN) SecCoreData->StackBase;

               HeapOffset             = (INTN) ((UINTN) Private->PhysicalMemoryBegin + Private->StackSize - \

                                                (UINTN) SecCoreData->PeiTemporaryRamBase);

               DEBUG ((EFI_D_INFO, "Heap Offset = 0x%X Stack Offset = 0x%X\n", HeapOffset, StackOffset));

               

+              //

+              // Caculate new HandOffTable and PrivateData address in permenet memory's stack

+              //

               NewHandOffTable        = (EFI_HOB_HANDOFF_INFO_TABLE *)((UINTN)OldHandOffTable + HeapOffset);

               PrivateInMem           = (PEI_CORE_INSTANCE *)((UINTN) (VOID*) Private + StackOffset);

 

@@ -502,6 +510,12 @@ PeiDispatcher (
 

 

               if (!EFI_ERROR (Status)) {

+                //

+                // Temporary Ram support Ppi is provided by platform, it will copy 

+                // temporary memory to permenent memory and do stack switching.

+                // After invoken temporary Ram support, following code's stack is in 

+                // memory but not in CAR.

+                //

                 TemporaryRamSupportPpi->TemporaryRamMigration (

                                           (CONST EFI_PEI_SERVICES **) PeiServices,

                                           (EFI_PHYSICAL_ADDRESS)(UINTN) SecCoreData->TemporaryRamBase,

@@ -549,7 +563,7 @@ PeiDispatcher (
               //

               // We need convert the PPI desciptor's pointer

               //

-              ConvertPpiPointers ((CONST EFI_PEI_SERVICES **)PeiServices, 

+              ConvertPpiPointers (PrivateInMem, 

                                   OldCheckingBottom, 

                                   OldCheckingTop, 

                                   HeapOffset

diff --git a/MdeModulePkg/Core/Pei/FwVol/FwVol.c b/MdeModulePkg/Core/Pei/FwVol/FwVol.c
index d5af3a0b1d..689e0953bd 100644
--- a/MdeModulePkg/Core/Pei/FwVol/FwVol.c
+++ b/MdeModulePkg/Core/Pei/FwVol/FwVol.c
@@ -10,14 +10,6 @@ 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.             

 

-Module Name:

-

-  FwVol.c

-

-Abstract:

-

-  

-

 **/

 

 #include <PeiMain.h>

@@ -35,7 +27,6 @@ STATIC EFI_PEI_NOTIFY_DESCRIPTOR mNotifyOnFvInfoList = {
 /**

   Returns the highest bit set of the State field

 

-

   @param ErasePolarity   Erase Polarity  as defined by EFI_FVB2_ERASE_POLARITY

                          in the Attributes field.

   @param FfsHeader       Pointer to FFS File Header.

@@ -222,8 +213,8 @@ PeiFindFileEx (
     switch (FileState) {

 

     case EFI_FILE_HEADER_INVALID:

-      FileOffset += sizeof(EFI_FFS_FILE_HEADER);

-      FfsFileHeader = (EFI_FFS_FILE_HEADER *)((UINT8 *)FfsFileHeader + sizeof(EFI_FFS_FILE_HEADER));

+      FileOffset    += sizeof(EFI_FFS_FILE_HEADER);

+      FfsFileHeader =  (EFI_FFS_FILE_HEADER *)((UINT8 *)FfsFileHeader + sizeof(EFI_FFS_FILE_HEADER));

       break;

         

     case EFI_FILE_DATA_VALID:

@@ -234,7 +225,7 @@ PeiFindFileEx (
         return EFI_NOT_FOUND;

       }

 

-      FileLength = *(UINT32 *)(FfsFileHeader->Size) & 0x00FFFFFF;

+      FileLength       = *(UINT32 *)(FfsFileHeader->Size) & 0x00FFFFFF;

       FileOccupiedSize = GET_OCCUPIED_SIZE(FileLength, 8);

 

       if (FileName != NULL) {

@@ -262,15 +253,15 @@ PeiFindFileEx (
         return EFI_SUCCESS;

       }

 

-      FileOffset += FileOccupiedSize; 

-      FfsFileHeader = (EFI_FFS_FILE_HEADER *)((UINT8 *)FfsFileHeader + FileOccupiedSize);

+      FileOffset    += FileOccupiedSize; 

+      FfsFileHeader =  (EFI_FFS_FILE_HEADER *)((UINT8 *)FfsFileHeader + FileOccupiedSize);

       break;

     

     case EFI_FILE_DELETED:

-      FileLength = *(UINT32 *)(FfsFileHeader->Size) & 0x00FFFFFF;

-      FileOccupiedSize = GET_OCCUPIED_SIZE(FileLength, 8);

-      FileOffset += FileOccupiedSize;

-      FfsFileHeader = (EFI_FFS_FILE_HEADER *)((UINT8 *)FfsFileHeader + FileOccupiedSize);

+      FileLength       =  *(UINT32 *)(FfsFileHeader->Size) & 0x00FFFFFF;

+      FileOccupiedSize =  GET_OCCUPIED_SIZE(FileLength, 8);

+      FileOffset       += FileOccupiedSize;

+      FfsFileHeader    =  (EFI_FFS_FILE_HEADER *)((UINT8 *)FfsFileHeader + FileOccupiedSize);

       break;

 

     default:

@@ -284,15 +275,10 @@ PeiFindFileEx (
 }

 

 /**

-

   Initialize PeiCore Fv List.

 

-

   @param PrivateData     - Pointer to PEI_CORE_INSTANCE.

   @param SecCoreData     - Pointer to EFI_SEC_PEI_HAND_OFF.

-

-  @return NONE

-

 **/

 VOID 

 PeiInitializeFv (

diff --git a/MdeModulePkg/Core/Pei/Hob/Hob.c b/MdeModulePkg/Core/Pei/Hob/Hob.c
index aa38228bec..4eb4b9a892 100644
--- a/MdeModulePkg/Core/Pei/Hob/Hob.c
+++ b/MdeModulePkg/Core/Pei/Hob/Hob.c
@@ -18,7 +18,6 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
 

   Gets the pointer to the HOB List.

 

-

   @param PeiServices                   The PEI core services table.

   @param HobList                       Pointer to the HOB List.

 

@@ -35,7 +34,6 @@ PeiGetHobList (
   )

 {

   PEI_CORE_INSTANCE *PrivateData;

-

   

   //

   // Only check this parameter in debug mode

@@ -51,7 +49,6 @@ PeiGetHobList (
 

   *HobList    = PrivateData->HobList.Raw;

 

-

   return EFI_SUCCESS;   

 }

 

@@ -59,10 +56,10 @@ PeiGetHobList (
 /**

   Add a new HOB to the HOB List.

 

-  @param PeiServices     - The PEI core services table.

-  @param Type            - Type of the new HOB.

-  @param Length          - Length of the new HOB to allocate.

-  @param Hob             - Pointer to the new HOB.

+  @param PeiServices      The PEI core services table.

+  @param Type             Type of the new HOB.

+  @param Length           Length of the new HOB to allocate.

+  @param Hob              Pointer to the new HOB.

 

   @return  EFI_SUCCESS           Success to create hob.

   @retval  EFI_INVALID_PARAMETER if Hob is NULL

@@ -118,11 +115,9 @@ PeiCreateHob (
   HobEnd++;

   HandOffHob->EfiFreeMemoryBottom = (EFI_PHYSICAL_ADDRESS) (UINTN) HobEnd;

 

-

   return EFI_SUCCESS;   

 }

 

-

 /**

 

   Builds a Handoff Information Table HOB

@@ -144,15 +139,15 @@ PeiCoreBuildHobHandoffInfoTable (
   EFI_HOB_HANDOFF_INFO_TABLE   *Hob;

   EFI_HOB_GENERIC_HEADER       *HobEnd;

 

-  Hob    = (VOID *)(UINTN)MemoryBegin;

-  HobEnd = (EFI_HOB_GENERIC_HEADER*) (Hob+1);

-  Hob->Header.HobType   = EFI_HOB_TYPE_HANDOFF;

-  Hob->Header.HobLength = sizeof(EFI_HOB_HANDOFF_INFO_TABLE);

-  Hob->Header.Reserved  = 0;

+  Hob                      = (VOID *)(UINTN)MemoryBegin;

+  HobEnd                   = (EFI_HOB_GENERIC_HEADER*) (Hob+1);

+  Hob->Header.HobType      = EFI_HOB_TYPE_HANDOFF;

+  Hob->Header.HobLength    = sizeof(EFI_HOB_HANDOFF_INFO_TABLE);

+  Hob->Header.Reserved     = 0;

   

-  HobEnd->HobType     = EFI_HOB_TYPE_END_OF_HOB_LIST;

-  HobEnd->HobLength   = sizeof(EFI_HOB_GENERIC_HEADER);

-  HobEnd->Reserved    = 0;

+  HobEnd->HobType          = EFI_HOB_TYPE_END_OF_HOB_LIST;

+  HobEnd->HobLength        = sizeof(EFI_HOB_GENERIC_HEADER);

+  HobEnd->Reserved         = 0;

 

   Hob->Version             = EFI_HOB_HANDOFF_TABLE_VERSION;

   Hob->BootMode            = BootMode;

@@ -160,7 +155,7 @@ PeiCoreBuildHobHandoffInfoTable (
   Hob->EfiMemoryTop        = MemoryBegin + MemoryLength;

   Hob->EfiMemoryBottom     = MemoryBegin;

   Hob->EfiFreeMemoryTop    = MemoryBegin + MemoryLength;

-  Hob->EfiFreeMemoryBottom = (EFI_PHYSICAL_ADDRESS) (UINTN) (HobEnd+1);

+  Hob->EfiFreeMemoryBottom = (EFI_PHYSICAL_ADDRESS) (UINTN) (HobEnd + 1);

   Hob->EfiEndOfHobList     = (EFI_PHYSICAL_ADDRESS) (UINTN) HobEnd;

 

   return EFI_SUCCESS;

diff --git a/MdeModulePkg/Core/Pei/Memory/MemoryServices.c b/MdeModulePkg/Core/Pei/Memory/MemoryServices.c
index 58c5d81517..de32b69bd2 100644
--- a/MdeModulePkg/Core/Pei/Memory/MemoryServices.c
+++ b/MdeModulePkg/Core/Pei/Memory/MemoryServices.c
@@ -37,6 +37,10 @@ InitializeMemoryServices (
   

   PrivateData->SwitchStackSignal      = FALSE;

 

+  //

+  // First entering PeiCore, following code will initialized some field

+  // in PeiCore's private data according to hand off data from sec core.

+  //

   if (OldCoreData == NULL) {

 

     PrivateData->PeiMemoryInstalled = FALSE;

@@ -159,8 +163,6 @@ PeiAllocatePages (
     FreeMemoryBottom  = &(Hob.HandoffInformationTable->EfiFreeMemoryBottom);

   }

 

-  

-

   //

   // Check to see if on 4k boundary

   //

diff --git a/MdeModulePkg/Core/Pei/PeiMain.h b/MdeModulePkg/Core/Pei/PeiMain.h
index 7f7ac196d6..3cd642ea4f 100644
--- a/MdeModulePkg/Core/Pei/PeiMain.h
+++ b/MdeModulePkg/Core/Pei/PeiMain.h
@@ -58,6 +58,9 @@ typedef union {
   VOID                        *Raw;

 } PEI_PPI_LIST_POINTERS;

 

+///

+/// PPI database structure

+///

 typedef struct {

   INTN                    PpiListEnd;

   INTN                    NotifyListEnd;

@@ -94,12 +97,12 @@ typedef struct {
   UINTN                               SectionIndex;

 } CACHE_SECTION_DATA;

 

-//

-// Pei Core private data structure instance

-//

 

 #define PEI_CORE_HANDLE_SIGNATURE  EFI_SIGNATURE_32('P','e','i','C')

 

+///

+/// Pei Core private data structure instance

+///

 typedef struct{

   UINTN                              Signature;

   EFI_PEI_SERVICES                   *PS;     // Point to ServiceTableShadow

@@ -134,10 +137,9 @@ typedef struct{
   CACHE_SECTION_DATA                 CacheSection;

 } PEI_CORE_INSTANCE;

 

-//

-// Pei Core Instance Data Macros

-//

-

+///

+/// Pei Core Instance Data Macros

+///

 #define PEI_CORE_INSTANCE_FROM_PS_THIS(a) \

   CR(a, PEI_CORE_INSTANCE, PS, PEI_CORE_HANDLE_SIGNATURE)

 

@@ -266,8 +268,6 @@ PeiDispatcher (
                          environment, such as the size and location of temporary RAM, the stack location and

                          the BFV location.

 

-  @return None.

-

 **/

 VOID

 InitializeDispatcherData (

@@ -305,7 +305,6 @@ DepexSatisfied (
 

   Initialize PPI services.

 

-

   @param PrivateData     Pointer to the PEI Core data.

   @param OldCoreData     Pointer to old PEI Core data. 

                          NULL if being run in non-permament memory mode.

@@ -331,10 +330,10 @@ InitializePpiServices (
 **/

 VOID

 ConvertPpiPointers (

-  IN CONST EFI_PEI_SERVICES        **PeiServices,

-  IN UINTN                         OldCheckingBottom,

-  IN UINTN                         OldCheckingTop,

-  IN UINTN                         Fixup

+  IN PEI_CORE_INSTANCE       *PrivateData,

+  IN UINTN                   OldCheckingBottom,

+  IN UINTN                   OldCheckingTop,

+  IN INTN                    Fixup

   )

 ;

 

@@ -512,9 +511,8 @@ PeiSetBootMode (
 

   Initialize the security services.

 

-

-  @param PeiServices     - The PEI core services table.

-  @param OldCoreData     - Pointer to the old core data.

+  @param PeiServices     The PEI core services table.

+  @param OldCoreData     Pointer to the old core data.

                          NULL if being run in non-permament memory mode.

 

 **/

@@ -528,10 +526,10 @@ InitializeSecurityServices (
 /**

   Verify a Firmware volume

 

-  @param CurrentFvAddress - Pointer to the current Firmware Volume under consideration

+  @param CurrentFvAddress           Pointer to the current Firmware Volume under consideration

 

-  @retval EFI_SUCCESS             - Firmware Volume is legal

-  @retval EFI_SECURITY_VIOLATION  - Firmware Volume fails integrity test

+  @retval EFI_SUCCESS               Firmware Volume is legal

+  @retval EFI_SECURITY_VIOLATION    Firmware Volume fails integrity test

 

 **/

 EFI_STATUS

diff --git a/MdeModulePkg/Core/Pei/PeiMain.inf b/MdeModulePkg/Core/Pei/PeiMain.inf
index 09e380d628..af8e2acdac 100644
--- a/MdeModulePkg/Core/Pei/PeiMain.inf
+++ b/MdeModulePkg/Core/Pei/PeiMain.inf
@@ -75,12 +75,12 @@
   gEfiPeiStatusCodePpiGuid                      # PPI SOMETIMES_CONSUMED

   gEfiPeiResetPpiGuid                           # PPI SOMETIMES_CONSUMED

   gEfiDxeIplPpiGuid                             # PPI ALWAYS_CONSUMED

-  gEfiPeiMemoryDiscoveredPpiGuid                # PPI ALWAYS_PRODUCED

-  gEfiPeiDecompressPpiGuid

-  gEfiPeiFirmwareVolumeInfoPpiGuid

-  gEfiPeiLoadFilePpiGuid

-  gEfiPeiSecurity2PpiGuid

-  gEfiTemporaryRamSupportPpiGuid

+  gEfiPeiMemoryDiscoveredPpiGuid                # PPI ALWAYS_CONSUMED

+  gEfiPeiDecompressPpiGuid                      # PPI ALWAYS_CONSUMED

+  gEfiPeiFirmwareVolumeInfoPpiGuid              # PPI ALWAYS_CONSUMED

+  gEfiPeiLoadFilePpiGuid                        # PPI ALWAYS_CONSUMED

+  gEfiPeiSecurity2PpiGuid                       # PPI ALWAYS_CONSUMED

+  gEfiTemporaryRamSupportPpiGuid                # PPI ALWAYS_CONSUMED

 

 [FixedPcd.common]

   gEfiMdeModulePkgTokenSpaceGuid.PcdPeiCoreMaxFvSupported

@@ -90,7 +90,6 @@
   gEfiMdePkgTokenSpaceGuid.PcdStatusCodeValuePeiCoreEntry

   gEfiMdeModulePkgTokenSpaceGuid.PcdPeiCoreMaxPeiStackSize

 

-

 [FeaturePcd.common]

   gEfiMdeModulePkgTokenSpaceGuid.PcdPeiCoreImageLoaderSearchTeSectionFirst

 

diff --git a/MdeModulePkg/Core/Pei/PeiMain/PeiMain.c b/MdeModulePkg/Core/Pei/PeiMain/PeiMain.c
index 056165e689..1524abf81c 100644
--- a/MdeModulePkg/Core/Pei/PeiMain/PeiMain.c
+++ b/MdeModulePkg/Core/Pei/PeiMain/PeiMain.c
@@ -20,10 +20,10 @@ STATIC EFI_PEI_PPI_DESCRIPTOR mMemoryDiscoveredPpi = {
   NULL

 };

 

-//

-// Pei Core Module Variables

-//

-//

+///

+/// Pei Core Module Variables

+///

+///

 STATIC EFI_PEI_SERVICES  gPs = {

   {

     PEI_SERVICES_SIGNATURE,

@@ -107,12 +107,20 @@ PeiCore (
   mTick = 0;

   OldCoreData = (PEI_CORE_INSTANCE *) Data;

 

+  //

+  // Record the system tick for first entering PeiCore.

+  // This tick is duration of executing platform seccore module.

+  // 

   if (PerformanceMeasurementEnabled()) {

     if (OldCoreData == NULL) {

       mTick = GetPerformanceCounter ();

     }

   }

 

+  //

+  // PeiCore has been shadowed to memory for first entering, so

+  // just jump to PeiCore in memory here.

+  //

   if (OldCoreData != NULL) {

     ShadowedPeiCore = (PEI_CORE_ENTRY_POINT) (UINTN) OldCoreData->ShadowedPeiCore;

     if (ShadowedPeiCore != NULL) {

@@ -143,7 +151,6 @@ PeiCore (
 

   //

   // Initialize libraries that the PeiCore is linked against

-  // BUGBUG: The FileHandle is passed in as NULL.  Do we look it up or remove it from the lib init?

   //

   ProcessLibraryConstructorList (NULL, &PrivateData.PS);

 

@@ -213,6 +220,10 @@ PeiCore (
   //

   ASSERT(PrivateData.PeiMemoryInstalled == TRUE);

 

+  //

+  // Till now, PEI phase will be finished, get performace count

+  // for computing duration of PEI phase

+  //

   PERF_END (NULL, "PostMem", NULL, 0);

 

   Status = PeiServicesLocatePpi (

@@ -223,6 +234,9 @@ PeiCore (
              );

   ASSERT_EFI_ERROR (Status);

 

+  //

+  // Enter DxeIpl to load Dxe core.

+  //

   DEBUG ((EFI_D_INFO, "DXE IPL Entry\n"));

   Status = TempPtr.DxeIpl->Entry (

                              TempPtr.DxeIpl,

diff --git a/MdeModulePkg/Core/Pei/Ppi/Ppi.c b/MdeModulePkg/Core/Pei/Ppi/Ppi.c
index b7a9b12321..28ddd99e3c 100644
--- a/MdeModulePkg/Core/Pei/Ppi/Ppi.c
+++ b/MdeModulePkg/Core/Pei/Ppi/Ppi.c
@@ -18,7 +18,6 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
 

   Initialize PPI services.

 

-

   @param PrivateData     Pointer to the PEI Core data.

   @param OldCoreData     Pointer to old PEI Core data. 

                          NULL if being run in non-permament memory mode.

@@ -50,18 +49,15 @@ InitializePpiServices (
 **/

 VOID

 ConvertPpiPointers (

-  IN CONST EFI_PEI_SERVICES        **PeiServices,

-  IN UINTN                         OldCheckingBottom,

-  IN UINTN                         OldCheckingTop,

-  IN UINTN                         Fixup

+  IN PEI_CORE_INSTANCE       *PrivateData,

+  IN UINTN                   OldCheckingBottom,

+  IN UINTN                   OldCheckingTop,

+  IN INTN                    Fixup

   )

 {

-  PEI_CORE_INSTANCE     *PrivateData;

   UINT8                 Index;

   PEI_PPI_LIST_POINTERS *PpiPointer;

 

-  PrivateData = PEI_CORE_INSTANCE_FROM_PS_THIS(PeiServices);

-

   for (Index = 0; Index < FixedPcdGet32 (PcdPeiCoreMaxPpiSupported); Index++) {

     if (Index < PrivateData->PpiData.PpiListEnd ||

         Index > PrivateData->PpiData.NotifyListEnd) {

@@ -342,7 +338,6 @@ PeiLocatePpi (
 

   Install a notification for a given PPI.

 

-

   @param PeiServices     - Pointer to the PEI Service Table

   @param NotifyList      - Pointer to list of Descriptors to notify upon.

 

@@ -451,7 +446,6 @@ PeiNotifyPpi (
     PrivateData->PpiData.NotifyListEnd

     );

 

-

   return  EFI_SUCCESS;

 }

 

@@ -578,7 +572,5 @@ DispatchNotify (
       }

     }

   }

-

-  return;

 }

 

diff --git a/MdeModulePkg/Core/Pei/Security/Security.c b/MdeModulePkg/Core/Pei/Security/Security.c
index cf33447602..b7cc10058e 100644
--- a/MdeModulePkg/Core/Pei/Security/Security.c
+++ b/MdeModulePkg/Core/Pei/Security/Security.c
@@ -40,12 +40,10 @@ STATIC EFI_PEI_NOTIFY_DESCRIPTOR mNotifyList = {
 };

 

 /**

-

   Initialize the security services.

 

-

-  @param PeiServices     - The PEI core services table.

-  @param OldCoreData     - Pointer to the old core data.

+  @param PeiServices     The PEI core services table.

+  @param OldCoreData     Pointer to the old core data.

                          NULL if being run in non-permament memory mode.

 

 **/

diff --git a/MdeModulePkg/Core/Pei/StatusCode/StatusCode.c b/MdeModulePkg/Core/Pei/StatusCode/StatusCode.c
index 8e271d5e63..d39311c7a4 100644
--- a/MdeModulePkg/Core/Pei/StatusCode/StatusCode.c
+++ b/MdeModulePkg/Core/Pei/StatusCode/StatusCode.c
@@ -43,10 +43,9 @@ PeiReportStatusCode (
 {

   EFI_STATUS                Status;

   EFI_PEI_PROGRESS_CODE_PPI *StatusCodePpi;

-  

 

   //

-  //Locate StatusCode Ppi.

+  // Locate StatusCode Ppi.

   //

   Status = PeiServicesLocatePpi (

              &gEfiPeiStatusCodePpiGuid,