audk/MdeModulePkg/ChangeLog.txt

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!!!!!!!!!!!!!!!!!               Notes for this ChangeLog.txt             !!!!!!!!!!!!!!!!!

This log file is used to record two kinds of important information:
 a) "Non-Compatible Changes": all non-compatible changes should be recorded. These info
    will help the package user to merge this package; and some non-compatible changes
    can also be added into release notes as news features when we release this package.
    Normally Non-Compatible Changes contains the following types:
      1) Package's external services were changed/updated
      2) Package's common .h file is renamed, deleted, or the file path is changed.
      3) The definition of package's common data structure is changed
      ...

 b) "Important Compatible Changes": some important compatible changes can aslo be recorded
    in this file, and we can add these updating into release notes when we release this
    package.

Non-Compatible and Compatible example format:
==========================================================================================
EDK_0010: Non-Compatible: owner

	  Class_HFile: PPI A of MdePkg has been removed.

		Code Change :
		1) Removed the .h file: MdePkg\Include\Ppi\A.h

		Possible Impacts:
		1) All modules that used this PPI A should be updated.

==========================================================================================
EDK_0000: Compatible: owner

	  Class_BuildTool: with the EDK_0000 build.exe, the build performance is enhanced great.

		Code Change :
		1) BaseTools\Bin\Win32\build.exe

!!!!!!!!!!!!!!!!!!                     End of Notes                     !!!!!!!!!!!!!!!!!!
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==========================================================================================
EDK_3773:  Non-Compatible: qwang12

	  Class_PIEnable[0]:  Enable DXE Core to produce EFI_FIRMWARE_VOLUME2_PROTOCOL only.

		Code Change :
		1) Modify MdeModulePkg/Core/Dxe/DxeMain.inf module to produce only
		   EFI_FIRMWARE_VOLUME2_PROTOCOL.	Previously, EFI_FIRMWARE_VOLUME_PROTOCOL
		   is produced by Dxe Core.

		Possible Impacts:
		1) All modules that references EFI_FIRMWARE_VOLUME_PROTOCOL must be updated to use
	 	   EFI_FIRMWARE_VOLUME2_PROTOCOL.
		2) All modules that references gEfiFirmwareVolumeProtocolGuid must be updated to
		   use gEfiFirmwareVolume2ProtocolGuid.
		3) The gEfiFirmwareVolumeProtocolGuid in [Depex] section of INF file should updated.
		   And the package dependency should also be changed if needed due to this protocol
		   GUID change.

==========================================================================================
EDK_3871: Non-Compatible: klu2
	
	Class_PIEnable[1]: Use new entry point for PeiCore defined in PI specification.
	
	Code Change:
	1) PeiMain module use PeiCoreEntryPoint library class but *not* original OldPeiCoreEntryPoint.
	2) The memory service in PeiMain module get CAR base and size from parameter of PeiCore's
	   Entry point directly but *not* computed from stack's base.
	
	Possible Impacts:
	1) Platform should select MdePkg/Library/PeiCoreEntryPoint/PeiCoreEntryPoint.inf for 
	   PeiMain module.
	2) The SecCore module should provide parameters for new entry point defined in 
	   MdePkg\Include\Library\PeiCoreEntryPoint.h
	   
==========================================================================================
EDK_3866:  Compatible: qhuang8

	  Class_UefiEnable[0]:  Uefi2.1 feature - Add Hardware Error Record Persistence Support 
		Code Change :
		1) Modify MdeModulePkg/Universal/Variable/RuntimeDxe
                2) Modify MdeModulePkg/Universal/Variable/EmuRuntimeDxe