REF: https://bugzilla.tianocore.org/show_bug.cgi?id=3993
FSPI_UPD is required only When platforms implemented FSP_I component.
Updated the scripts to allow FSPI_UPD not present scenario.
Also fixed FSP_GLOBAL_DATA structure alignment issue and unnecessary
non-backward compatibility change in previous FSP_I patch.

Cc: Nate DeSimone <nathaniel.l.desim...@intel.com>
Cc: Star Zeng <star.z...@intel.com>
Signed-off-by: Chasel Chiu <chasel.c...@intel.com>
---
 IntelFsp2Pkg/Include/FspGlobalData.h | 43 
+++++++++++++++++++++----------------------
 IntelFsp2Pkg/Tools/GenCfgOpt.py      | 14 ++++++++++----
 2 files changed, 31 insertions(+), 26 deletions(-)

diff --git a/IntelFsp2Pkg/Include/FspGlobalData.h 
b/IntelFsp2Pkg/Include/FspGlobalData.h
index cf94f7b6a5..32c6d460e4 100644
--- a/IntelFsp2Pkg/Include/FspGlobalData.h
+++ b/IntelFsp2Pkg/Include/FspGlobalData.h
@@ -42,58 +42,57 @@ typedef struct  {
 #define FSP_PERFORMANCE_DATA_TIMER_MASK  0xFFFFFFFFFFFFFF
 
 typedef struct  {
-  UINT32    Signature;
-  UINT8     Version;
-  UINT8     Reserved1[3];
+  UINT32             Signature;
+  UINT8              Version;
+  UINT8              Reserved1[3];
   ///
   /// Offset 0x08
   ///
-  UINTN     CoreStack;
-  UINTN     Reserved2;
+  UINTN              CoreStack;
+  VOID               *SmmInitUpdPtr;
   ///
   /// IA32: Offset 0x10; X64: Offset 0x18
   ///
-  UINT32    StatusCode;
-  UINT8     ApiIdx;
+  UINT32             StatusCode;
+  UINT8              ApiIdx;
   ///
   /// 0: FSP in API mode; 1: FSP in DISPATCH mode
   ///
-  UINT8     FspMode;
-  UINT8     OnSeparateStack;
-  UINT8     Reserved3;
-  UINT32    NumberOfPhases;
-  UINT32    PhasesExecuted;
-  UINT32    Reserved4[8];
+  UINT8              FspMode;
+  UINT8              OnSeparateStack;
+  UINT8              Reserved2;
+  UINT32             NumberOfPhases;
+  UINT32             PhasesExecuted;
+  UINT32             Reserved3[8];
   ///
   /// IA32: Offset 0x40; X64: Offset 0x48
   /// Start of UINTN and pointer section
-  /// All UINTN and pointer members must be put in this section
-  /// except CoreStack and Reserved2. In addition, the number of
-  /// UINTN and pointer members must be even for natural alignment
-  /// in both IA32 and X64.
+  /// All UINTN and pointer members are put in this section
+  /// for maintaining natural alignment for both IA32 and X64 builds.
   ///
   FSP_PLAT_DATA      PlatformData;
   VOID               *TempRamInitUpdPtr;
   VOID               *MemoryInitUpdPtr;
   VOID               *SiliconInitUpdPtr;
-  VOID               *SmmInitUpdPtr;
   ///
-  /// IA32: Offset 0x68; X64: Offset 0x98
+  /// IA32: Offset 0x64; X64: Offset 0x90
   /// To store function parameters pointer
   /// so it can be retrieved after stack switched.
   ///
   VOID               *FunctionParameterPtr;
   FSP_INFO_HEADER    *FspInfoHeader;
   VOID               *UpdDataPtr;
-  UINTN              Reserved5;
   ///
   /// End of UINTN and pointer section
+  /// At this point, next field offset must be either *0h or *8h to
+  /// meet natural alignment requirement.
   ///
-  UINT8              Reserved6[16];
+  UINT8              Reserved4[16];
   UINT32             PerfSig;
   UINT16             PerfLen;
-  UINT16             Reserved7;
+  UINT16             Reserved5;
   UINT32             PerfIdx;
+  UINT32             Reserved6;
   UINT64             PerfData[32];
 } FSP_GLOBAL_DATA;
 
diff --git a/IntelFsp2Pkg/Tools/GenCfgOpt.py b/IntelFsp2Pkg/Tools/GenCfgOpt.py
index 128b896592..71c48f10e0 100644
--- a/IntelFsp2Pkg/Tools/GenCfgOpt.py
+++ b/IntelFsp2Pkg/Tools/GenCfgOpt.py
@@ -959,8 +959,13 @@ EndList
             UpdTxtFile = ''
             FvDir = self._FvDir
             if GuidList[Index] not in self._MacroDict:
-                self.Error = "%s definition is missing in DSC file" % 
(GuidList[Index])
-                return 1
+                NoFSPI = False
+                if GuidList[Index] == 'FSP_I_UPD_TOOL_GUID':
+                    NoFSPI = True
+                    continue
+                else:
+                    self.Error = "%s definition is missing in DSC file" % 
(GuidList[Index])
+                    return 1
 
             if UpdTxtFile == '':
                 UpdTxtFile = os.path.join(FvDir, 
self._MacroDict[GuidList[Index]] + '.txt')
@@ -1296,7 +1301,8 @@ EndList
                elif '_S' in SignatureStr[6:6+2]:
                    TxtBody.append("#define FSPS_UPD_SIGNATURE               %s 
       /* '%s' */\n\n" % (Item['value'], SignatureStr))
                elif '_I' in SignatureStr[6:6+2]:
-                   TxtBody.append("#define FSPI_UPD_SIGNATURE               %s 
       /* '%s' */\n\n" % (Item['value'], SignatureStr))
+                   if NoFSPI == True:
+                       TxtBody.append("#define FSPI_UPD_SIGNATURE              
 %s        /* '%s' */\n\n" % (Item['value'], SignatureStr))
         TxtBody.append("\n")
 
         for Region in ['UPD']:
@@ -1702,7 +1708,7 @@ EndList
 
 
 def Usage():
-    print ("GenCfgOpt Version 0.58")
+    print ("GenCfgOpt Version 0.59")
     print ("Usage:")
     print ("    GenCfgOpt  UPDTXT  PlatformDscFile BuildFvDir                 
[-D Macros]")
     print ("    GenCfgOpt  HEADER  PlatformDscFile BuildFvDir  InputHFile     
[-D Macros]")
-- 
2.35.0.windows.1



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