[PATCH v3] IntelFsp2WrapperPkg: Add a PCD to control if signaling PciEnumerationComplete.

[gdong1 <guo.dong@intel.com>]

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 PciEnumerationComplete might be signaled to FSP in Coreboot. So FSP
 wrapper driver don't need send it again. Add a PCD to control if a
 FSP API could be skipped from FspWrapperNotifyDxe driver.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Guo Dong <guo.dong@intel.com>
Reviewed-by: Maurice Ma <maurice.ma@intel.com>
Reviewed-by: Jiewen Yao <jiewen.yao@intel.com>
Reviewed-by: Giri P Mudusuru <giri.p.mudusuru@intel.com>
---
 .../FspWrapperNotifyDxe/FspWrapperNotifyDxe.c      | 22 ++++++++++++++--------
 .../FspWrapperNotifyDxe/FspWrapperNotifyDxe.inf    |  1 +
 IntelFsp2WrapperPkg/IntelFsp2WrapperPkg.dec        | 18 ++++++++++++++++++
 3 files changed, 33 insertions(+), 8 deletions(-)

diff --git a/IntelFsp2WrapperPkg/FspWrapperNotifyDxe/FspWrapperNotifyDxe.c b/IntelFsp2WrapperPkg/FspWrapperNotifyDxe/FspWrapperNotifyDxe.c
index 0797f44..d09e20e 100644
--- a/IntelFsp2WrapperPkg/FspWrapperNotifyDxe/FspWrapperNotifyDxe.c
+++ b/IntelFsp2WrapperPkg/FspWrapperNotifyDxe/FspWrapperNotifyDxe.c
@@ -26,6 +26,8 @@
 #include <Library/PerformanceLib.h>
 #include <Library/HobLib.h>
 
+#define   FSP_API_NOTIFY_PHASE_AFTER_PCI_ENUMERATION     BIT16
+
 typedef
 EFI_STATUS
 (EFIAPI * ADD_PERFORMANCE_RECORDS)(
@@ -237,6 +239,7 @@ FspWrapperNotifyDxeEntryPoint (
   EFI_EVENT  ReadyToBootEvent;
   VOID       *Registration;
   EFI_EVENT  ProtocolNotifyEvent;
+  UINT32     FspApiMask;
 
   //
   // Load this driver's image to memory
@@ -246,14 +249,17 @@ FspWrapperNotifyDxeEntryPoint (
     return EFI_SUCCESS;
   }
 
-  ProtocolNotifyEvent = EfiCreateProtocolNotifyEvent (
-                          &gEfiPciEnumerationCompleteProtocolGuid,
-                          TPL_CALLBACK,
-                          OnPciEnumerationComplete,
-                          NULL,
-                          &Registration
-                          );
-  ASSERT (ProtocolNotifyEvent != NULL);
+  FspApiMask = PcdGet32 (PcdSkipFspApi);
+  if ((FspApiMask & FSP_API_NOTIFY_PHASE_AFTER_PCI_ENUMERATION) == 0) {
+    ProtocolNotifyEvent = EfiCreateProtocolNotifyEvent (
+                            &gEfiPciEnumerationCompleteProtocolGuid,
+                            TPL_CALLBACK,
+                            OnPciEnumerationComplete,
+                            NULL,
+                            &Registration
+                            );
+    ASSERT (ProtocolNotifyEvent != NULL);
+  }
 
   Status = EfiCreateEventReadyToBootEx (
              TPL_CALLBACK,
diff --git a/IntelFsp2WrapperPkg/FspWrapperNotifyDxe/FspWrapperNotifyDxe.inf b/IntelFsp2WrapperPkg/FspWrapperNotifyDxe/FspWrapperNotifyDxe.inf
index f851f68..54c2cbf 100644
--- a/IntelFsp2WrapperPkg/FspWrapperNotifyDxe/FspWrapperNotifyDxe.inf
+++ b/IntelFsp2WrapperPkg/FspWrapperNotifyDxe/FspWrapperNotifyDxe.inf
@@ -62,6 +62,7 @@
 
 [Pcd]
   gIntelFsp2WrapperTokenSpaceGuid.PcdFspsBaseAddress  ## CONSUMES
+  gIntelFsp2WrapperTokenSpaceGuid.PcdSkipFspApi       ## CONSUMES
 
 [Depex]
   TRUE
diff --git a/IntelFsp2WrapperPkg/IntelFsp2WrapperPkg.dec b/IntelFsp2WrapperPkg/IntelFsp2WrapperPkg.dec
index d9d2d80..ea3bc70 100644
--- a/IntelFsp2WrapperPkg/IntelFsp2WrapperPkg.dec
+++ b/IntelFsp2WrapperPkg/IntelFsp2WrapperPkg.dec
@@ -75,6 +75,24 @@
   gIntelFsp2WrapperTokenSpaceGuid.PcdFsptBaseAddress|0x00000000|UINT32|0x00000300
   gIntelFsp2WrapperTokenSpaceGuid.PcdFspmBaseAddress|0x00000000|UINT32|0x00000301
 
+  ## This PCD indicates if FSP APIs are skipped from FSP wrapper.<BR><BR>
+  #  If a bit is set, that means this FSP API is skipped.<BR>
+  #  If a bit is clear, that means this FSP API is NOT skipped.<BR>
+  #  NOTE: Only NotifyPhase Post PCI enumeration (BIT16) is implemented.<BR>
+  #  BIT[15:0] is for function:<BR>
+  #    BIT0    – Skip TempRamInit<BR>
+  #    BIT1    – Skip MemoryInit<BR>
+  #    BIT2    – Skip TempRamExit<BR>
+  #    BIT3    – Skip SiliconInit<BR>
+  #    BIT4    – Skip NotifyPhase<BR>
+  #  BIT[32:16] is for sub-function:<BR>
+  #    BIT16   – Skip NotifyPhase (AfterPciEnumeration)<BR>
+  #    BIT17   – Skip NotifyPhase (ReadyToBoot)<BR>
+  #    BIT18   – Skip NotifyPhase (EndOfFirmware)<BR>
+  #  Any undefined BITs are reserved for future use.<BR>
+  # @Prompt Skip FSP API from FSP wrapper.
+  gIntelFsp2WrapperTokenSpaceGuid.PcdSkipFspApi|0x00000000|UINT32|0x40000009
+
 [PcdsFixedAtBuild, PcdsPatchableInModule,PcdsDynamic,PcdsDynamicEx]
   gIntelFsp2WrapperTokenSpaceGuid.PcdFspsBaseAddress|0x00000000|UINT32|0x00001001
   
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