Add AsmEnableCache() and AsmDisableCache() as the IA32 & x64 specific BaseLib API.

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@6807 6f19259b-4bc3-4df7-8a09-765794883524

MdePkg/Include/Library/BaseLib.h

@@ -5212,6 +5212,34 @@ AsmCpuidEx (
   );
 
 
+/**
+  Set CD bit and clear NW bit of CR0 followed by a WBINVD.
+
+  Disables the caches by setting the CD bit of CR0 to 1, clearing the NW bit of CR0 to 0,
+  and executing a WBINVD instruction.  This function is only available on IA-32 and x64.
+
+**/
+VOID
+EFIAPI
+AsmDisableCache (
+  VOID
+  );
+
+
+/**
+  Perform a WBINVD and clear both the CD and NW bits of CR0.
+
+  Enables the caches by executing a WBINVD instruction and then clear both the CD and NW
+  bits of CR0 to 0.  This function is only available on IA-32 and x64.
+
+**/
+VOID
+EFIAPI
+AsmEnableCache (
+  VOID
+  );
+
+
 /**
   Returns the lower 32-bits of a Machine Specific Register(MSR).
 

MdePkg/Library/BaseLib/Ia32/DisableCache.c

@@ -13,10 +13,10 @@
 **/
 
 /**
-  Disables caches.
+  Set CD bit and clear NW bit of CR0 followed by a WBINVD.
 
-  Set the CD bit of CR0 to 1, clear the NW bit of CR0 to 0, and flush all caches with a
-  WBINVD instruction.
+  Disables the caches by setting the CD bit of CR0 to 1, clearing the NW bit of CR0 to 0,
+  and executing a WBINVD instruction.  This function is only available on IA-32 and x64.
 
 **/
 VOID

MdePkg/Library/BaseLib/Ia32/EnableCache.c

@@ -13,10 +13,10 @@
 **/
 
 /**
-  Enabled caches.
+  Perform a WBINVD and clear both the CD and NW bits of CR0.
 
-  Flush all caches with a WBINVD instruction, clear the CD bit of CR0 to 0, and clear 
-  the NW bit of CR0 to 0
+  Enables the caches by executing a WBINVD instruction and then clear both the CD and NW
+  bits of CR0 to 0.  This function is only available on IA-32 and x64.
 
 **/
 VOID