diff --git a/MdePkg/Library/PeimEntryPoint/PeimEntryPoint.c b/MdePkg/Library/PeimEntryPoint/PeimEntryPoint.c
index 1849f01bc7..8a2c71a3dd 100644
--- a/MdePkg/Library/PeimEntryPoint/PeimEntryPoint.c
+++ b/MdePkg/Library/PeimEntryPoint/PeimEntryPoint.c
@@ -23,7 +23,7 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
   Image entry point of Peim.
 
   @param  FfsHeader   Pointer to FFS header the loaded driver.
-  @param  PeiServices Pointer to the PEI services.
+  @param  PeiServices An indirect pointer to the EFI_PEI_SERVICES table published by the PEI Foundation
 
   @return  Status returned by entry points of Peims.
 
@@ -58,7 +58,7 @@ _ModuleEntryPoint (
   Wrapper of Peim image entry point.
 
   @param  FfsHeader   Pointer to FFS header the loaded driver.
-  @param  PeiServices Pointer to the PEI services.
+  @param  PeiServices An indirect pointer to the EFI_PEI_SERVICES table published by the PEI Foundation
 
   @return  Status returned by entry points of Peims.
 
diff --git a/MdePkg/Library/PeimEntryPoint/PeimEntryPoint.msa b/MdePkg/Library/PeimEntryPoint/PeimEntryPoint.msa
deleted file mode 100644
index d03d350671..0000000000
--- a/MdePkg/Library/PeimEntryPoint/PeimEntryPoint.msa
+++ /dev/null
@@ -1,42 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<ModuleSurfaceArea xmlns="http://www.TianoCore.org/2006/Edk2.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
-  <MsaHeader>
-    <ModuleName>PeimEntryPoint</ModuleName>
-    <ModuleType>PEIM</ModuleType>
-    <GuidValue>fa177ff7-1fc7-458d-a358-d9d62ae61cec</GuidValue>
-    <Version>1.0</Version>
-    <Abstract>Entry point of PEIM</Abstract>
-    <Description>Contain entry point to PEIM Module Type, construct all dependent libararies</Description>
-    <Copyright>Copyright (c) 2006, Intel Corporation.</Copyright>
-    <License>All rights reserved. This program and the accompanying materials
-      are licensed and made available under the terms and conditions of the BSD License
-      which accompanies this distribution.  The full text of the license may be found at
-      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.</License>
-    <Specification>FRAMEWORK_BUILD_PACKAGING_SPECIFICATION   0x00000052</Specification>
-  </MsaHeader>
-  <ModuleDefinitions>
-    <SupportedArchitectures>IA32 X64 IPF EBC</SupportedArchitectures>
-    <BinaryModule>false</BinaryModule>
-    <OutputFileBasename>PeimEntryPoint</OutputFileBasename>
-  </ModuleDefinitions>
-  <LibraryClassDefinitions>
-    <LibraryClass Usage="ALWAYS_PRODUCED" SupModuleList="PEIM">
-      <Keyword>PeimEntryPoint</Keyword>
-    </LibraryClass>
-    <LibraryClass Usage="ALWAYS_CONSUMED">
-      <Keyword>DebugLib</Keyword>
-    </LibraryClass>
-  </LibraryClassDefinitions>
-  <SourceFiles>
-    <Filename>PeimEntryPoint.c</Filename>
-  </SourceFiles>
-  <PackageDependencies>
-    <Package PackageGuid="5e0e9358-46b6-4ae2-8218-4ab8b9bbdcec"/>
-  </PackageDependencies>
-  <Externs>
-    <Specification>EFI_SPECIFICATION_VERSION 0x00020000</Specification>
-    <Specification>EDK_RELEASE_VERSION 0x00020000</Specification>
-  </Externs>
-</ModuleSurfaceArea>
\ No newline at end of file