1. Add three sample PCD in HelloWorld application for user reference of PCD usage.

2. PeiCore will always build FvHob for the extracted FvImage once it decompresses the new FvImage. 

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@5930 6f19259b-4bc3-4df7-8a09-765794883524

MdeModulePkg/Application/HelloWorld/HelloWorld.c

@@ -13,6 +13,7 @@
 **/
 
 #include <Uefi.h>
+#include <Library/PcdLib.h>
 #include <Library/DebugLib.h>
 #include <Library/UefiLib.h>
 #include <Library/UefiApplicationEntryPoint.h>
@@ -37,10 +38,19 @@ UefiMain (
   IN EFI_HANDLE        ImageHandle,
   IN EFI_SYSTEM_TABLE  *SystemTable
   )
-
 {
+	UINT32 Index;
 	
-  Print ((CHAR16 *)L"UEFI Hello World!\n");
+	Index = 0;
+  
+  //
+  // Three PCD type (FeatureFlag, UINT32 and String) are used as the sample.
+  //
+  if (FeaturePcdGet (PcdHelloWorldPrintEnable)) {
+  	for (Index = 0; Index < PcdGet32 (PcdHelloWorldPrintTimes); Index ++) {
+    	Print ((CHAR16*)PcdGetPtr (PcdHelloWorldPrintString));
+    }
+  }
 
   return EFI_SUCCESS;
 }

MdeModulePkg/Application/HelloWorld/HelloWorld.inf

@@ -31,18 +31,29 @@
 #  VALID_ARCHITECTURES           = IA32 X64 IPF EBC
 #
 
-[Sources.common]
+[Sources]
   HelloWorld.c
 
-
 [Packages]
   MdePkg/MdePkg.dec
-
+  MdeModulePkg/MdeModulePkg.dec
 
 [LibraryClasses]
   UefiBootServicesTableLib
   UefiApplicationEntryPoint
   UefiLib
   DebugLib
+  PcdLib
 
+[Guids]
 
+[Ppis]
+
+[Protocols]
+
+[FeaturePcd]
+  gEfiMdeModulePkgTokenSpaceGuid.PcdHelloWorldPrintEnable
+
+[Pcd]
+  gEfiMdeModulePkgTokenSpaceGuid.PcdHelloWorldPrintString
+  gEfiMdeModulePkgTokenSpaceGuid.PcdHelloWorldPrintTimes

MdeModulePkg/Core/Pei/FwVol/FwVol.c

@@ -923,22 +923,11 @@ ProcessFvFile (
 
   //
   // Inform the extracted FvImage to Fv HOB consumer phase, i.e. DXE phase
-  // based on its parent Fvimage is informed or not.
-  // If FvHob of its parent fvimage is built, the extracted FvImage will be built also. 
-  // Or, the extracted FvImage will not be built.
   //
-  HobPtr.Raw = GetHobList ();
-  while ((HobPtr.Raw = GetNextHob (EFI_HOB_TYPE_FV, HobPtr.Raw)) != NULL) {
-    if (((EFI_PHYSICAL_ADDRESS) (UINTN)FvFileHandle > HobPtr.FirmwareVolume->BaseAddress) && 
-        ((EFI_PHYSICAL_ADDRESS) (UINTN)FvFileHandle < HobPtr.FirmwareVolume->BaseAddress + HobPtr.FirmwareVolume->Length)) {
   BuildFvHob (
     (EFI_PHYSICAL_ADDRESS) (UINTN) FvImageInfo.FvStart,
     FvImageInfo.FvSize
   );
-      break;
-    }
-    HobPtr.Raw = GET_NEXT_HOB (HobPtr);
-  }
 
   //
   // Makes the encapsulated volume show up in DXE phase to skip processing of

MdeModulePkg/MdeModulePkg.dec

@@ -295,6 +295,12 @@
   ## IF TRUE, the PeiCore will handle the framework FvHob and install FvInfo PPI for it.
   gEfiMdeModulePkgTokenSpaceGuid.PcdFrameworkFvHobCompatibilitySupport|FALSE|BOOLEAN|0x00012009
   
+  ##
+  #  IF TRUE, HelloWorld Application will print the verbose information.
+  #  This PCD is a sample to explain FeatureFlag PCD usage.
+  ##
+  gEfiMdeModulePkgTokenSpaceGuid.PcdHelloWorldPrintEnable|TRUE|BOOLEAN|0x0001200a
+
 [PcdsFixedAtBuild.common]
   ## Dynamic type PCD can be registered callback function for Pcd setting action.
   #  PcdMaxPeiPcdCallBackNumberPerPcdEntry indicate maximum number of callback function
@@ -364,6 +370,18 @@
   ## Error level for hardware recorder.
   gEfiMdeModulePkgTokenSpaceGuid.PcdHardwareErrorRecordLevel|1|UINT16|0x40000002
   
+  ##
+  #  This PCD defines the print string.
+  #  This PCD is a sample to explain FixedAtBuild String PCD usage.
+  ##
+  gEfiMdeModulePkgTokenSpaceGuid.PcdHelloWorldPrintString|L"UEFI Hello World!\n"|VOID*|0x40000004
+
+  ##
+  #  This PCD defines the times to print hello world string.
+  #  This PCD is a sample to explain FixedAtBuild UINT32 PCD usage.
+  ##
+  gEfiMdeModulePkgTokenSpaceGuid.PcdHelloWorldPrintTimes|1|UINT32|0x40000005
+
 [PcdsFixedAtBuild.IA32]
   ## Default EFI boot path name for IA32 architecture, this path is relative to 
   #  EFI boot disk.
@@ -410,6 +428,18 @@
   ## Error level for hardware recorder.
   gEfiMdeModulePkgTokenSpaceGuid.PcdHardwareErrorRecordLevel|1|UINT16|0x40000002
 
+  ##
+  #  This PCD defines the print string.
+  #  This PCD is a sample to explain Dynamic PCD usage.
+  ##
+  gEfiMdeModulePkgTokenSpaceGuid.PcdHelloWorldPrintString|L"UEFI Hello World!\n"|VOID*|0x40000004
+
+  ##
+  #  This PCD defines the times to print hello world string.
+  #  This PCD is a sample to explain Dynamic UINT32 PCD usage.
+  ##
+  gEfiMdeModulePkgTokenSpaceGuid.PcdHelloWorldPrintTimes|1|UINT32|0x40000005
+
 [PcdsPatchableInModule.common]
   ## Maximun number of performance log entries during PEI phase.
   gEfiMdeModulePkgTokenSpaceGuid.PcdMaxPeiPerformanceLogEntries|40|UINT8|0x0001002f
@@ -439,6 +469,12 @@
   ## Error level for hardware recorder.
   gEfiMdeModulePkgTokenSpaceGuid.PcdHardwareErrorRecordLevel|1|UINT16|0x40000002
 
+  ##
+  #  This PCD defines the times to print hello world string.
+  #  This PCD is a sample to explain Patchable UINT32 PCD usage.
+  ##
+  gEfiMdeModulePkgTokenSpaceGuid.PcdHelloWorldPrintTimes|1|UINT32|0x40000005
+
 [PcdsFeatureFlag.IA32]
   ## If TRUE, the DXE IPL will load a 64-bit DxeCore.
   gEfiMdeModulePkgTokenSpaceGuid.PcdDxeIplSwitchToLongMode|TRUE|BOOLEAN|0x0001003b