created a new library instance with CpuSleep and CpuFlushTlb

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@4025 6f19259b-4bc3-4df7-8a09-765794883524

MdePkg/Include/Library/CpuLib.h

@@ -15,4 +15,46 @@
 #ifndef __CPU_LIB_H__
 #define __CPU_LIB_H__
 
+/**
+  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
+  );
+
+
+/**
+  Requests CPU to pause for a short period of time.
+
+  Requests CPU to pause for a short period of time. Typically used in MP
+  systems to prevent memory starvation while waiting for a spin lock.
+
+**/
+VOID
+EFIAPI
+CpuPause (
+  VOID
+  );
+
+
+/**
+  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
+  );
+
+
 #endif