diff --git a/MdePkg/Library/BaseLib/BaseLib.inf b/MdePkg/Library/BaseLib/BaseLib.inf
index b084eab21e..f262226a1b 100644
--- a/MdePkg/Library/BaseLib/BaseLib.inf
+++ b/MdePkg/Library/BaseLib/BaseLib.inf
@@ -156,8 +156,6 @@
   Ia32/CpuPause.c | MSFT 
   Ia32/CpuIdEx.c | MSFT 
   Ia32/CpuId.c | MSFT 
-  Ia32/CpuSleep.c | MSFT 
-  Ia32/CpuFlushTlb.c | MSFT 
   Ia32/CpuBreakpoint.c | MSFT 
   Ia32/ARShiftU64.c | MSFT 
   SynchronizationMsc.c  | MSFT
@@ -252,8 +250,6 @@
   Ia32/CpuPause.asm | INTEL 
   Ia32/CpuIdEx.asm | INTEL 
   Ia32/CpuId.asm | INTEL 
-  Ia32/CpuSleep.asm | INTEL 
-  Ia32/CpuFlushTlb.asm | INTEL 
   Ia32/CpuBreakpoint.asm | INTEL 
   Ia32/ARShiftU64.asm | INTEL 
   Synchronization.c | INTEL
@@ -262,10 +258,8 @@
   Ia32/EnablePaging64.asm
 
   Ia32/Thunk16.S | GCC 
-  Ia32/CpuFlushTlb.S | GCC 
   Ia32/CpuBreakpoint.S | GCC 
   Ia32/CpuPause.S | GCC 
-  Ia32/CpuSleep.S | GCC 
   Ia32/EnableDisableInterrupts.S | GCC 
   Ia32/DisableInterrupts.S | GCC 
   Ia32/EnableInterrupts.S | GCC 
@@ -380,9 +374,7 @@
 
 [Sources.X64]
   X64/Thunk16.asm
-  X64/CpuFlushTlb.asm
   X64/CpuPause.asm
-  X64/CpuSleep.asm
   X64/EnableDisableInterrupts.asm
   X64/DisableInterrupts.asm
   X64/EnableInterrupts.asm
@@ -568,11 +560,9 @@
   X64/EnableDisableInterrupts.S | GCC 
   X64/DisablePaging64.S | GCC 
   X64/DisableInterrupts.S | GCC 
-  X64/CpuSleep.S | GCC 
   X64/CpuPause.S | GCC 
   X64/CpuId.S | GCC 
   X64/CpuIdEx.S | GCC 
-  X64/CpuFlushTlb.S | GCC 
   X64/CpuBreakpoint.S | GCC 
   SynchronizationGcc.c  | GCC 
 
@@ -590,7 +580,6 @@
   Ipf/FlushCacheRange.s
   Ipf/InternalSwitchStack.c
   Ipf/GetInterruptState.s
-  Ipf/CpuFlushTlb.s
   Ipf/CpuPause.s
   Ipf/Synchronization.c
   Ipf/InterlockedCompareExchange64.s
diff --git a/MdePkg/Library/BaseLib/Ebc/CpuBreakpoint.c b/MdePkg/Library/BaseLib/Ebc/CpuBreakpoint.c
index cdba67c4cd..2849d96172 100644
--- a/MdePkg/Library/BaseLib/Ebc/CpuBreakpoint.c
+++ b/MdePkg/Library/BaseLib/Ebc/CpuBreakpoint.c
@@ -136,33 +136,3 @@ CpuPause (
 {
 }
 
-/**
-  Flushes all the Translation Lookaside Buffers(TLB) entries in a CPU.
-
-  Flushes all the Translation Lookaside Buffers(TLB) entries in a CPU.
-
-**/
-VOID
-EFIAPI
-CpuFlushTlb (
-  VOID
-  )
-{
-  ASSERT (FALSE);
-}
-
-/**
-  Places the CPU in a sleep state until an interrupt is received.
-
-  Places the CPU in a sleep state until an interrupt is received. If interrupts
-  are disabled prior to calling this function, then the CPU will be placed in a
-  sleep state indefinitely.
-
-**/
-VOID
-EFIAPI
-CpuSleep (
-  VOID
-  )
-{
-}
diff --git a/MdePkg/Library/BaseLib/Ipf/CpuBreakpoint.c b/MdePkg/Library/BaseLib/Ipf/CpuBreakpoint.c
index 59c7e40818..a72049b98a 100644
--- a/MdePkg/Library/BaseLib/Ipf/CpuBreakpoint.c
+++ b/MdePkg/Library/BaseLib/Ipf/CpuBreakpoint.c
@@ -96,20 +96,3 @@ EnableDisableInterrupts (
   EnableInterrupts ();
   DisableInterrupts ();
 }
-
-/**
-  Places the CPU in a sleep state until an interrupt is received.
-
-  Places the CPU in a sleep state until an interrupt is received. If interrupts
-  are disabled prior to calling this function, then the CPU will be placed in a
-  sleep state indefinitely.
-
-**/
-VOID
-EFIAPI
-CpuSleep (
-  VOID
-  )
-{
-  PalCallStatic (NULL, 29, 0, 0, 0);
-}
diff --git a/MdePkg/Library/BaseLib/Ipf/CpuBreakpointMsc.c b/MdePkg/Library/BaseLib/Ipf/CpuBreakpointMsc.c
index ed53e42b7b..74911b2764 100644
--- a/MdePkg/Library/BaseLib/Ipf/CpuBreakpointMsc.c
+++ b/MdePkg/Library/BaseLib/Ipf/CpuBreakpointMsc.c
@@ -102,19 +102,3 @@ EnableDisableInterrupts (
   DisableInterrupts ();
 }
 
-/**
-  Places the CPU in a sleep state until an interrupt is received.
-
-  Places the CPU in a sleep state until an interrupt is received. If interrupts
-  are disabled prior to calling this function, then the CPU will be placed in a
-  sleep state indefinitely.
-
-**/
-VOID
-EFIAPI
-CpuSleep (
-  VOID
-  )
-{
-  PalCallStatic (NULL, 29, 0, 0, 0);
-}