Need to add some extra functions to the libraries to support paging in the CpuDxe...

[mirror_edk2.git] / ArmPkg / Library / ArmLib / Arm9 / Arm9Support.asm

diff --git a/ArmPkg/Library/ArmLib/Arm9/Arm9Support.asm b/ArmPkg/Library/ArmLib/Arm9/Arm9Support.asm
index 3204d6607f62401632437af1098cd16815a16312..82634c7929562b04f95e25febf34c149304f9eba 100644 (file)
--- a/ArmPkg/Library/ArmLib/Arm9/Arm9Support.asm
+++ b/ArmPkg/Library/ArmLib/Arm9/Arm9Support.asm
@@ -21,6 +21,7 @@
     EXPORT  ArmCleanInvalidateDataCacheEntryByMVA
     EXPORT  ArmEnableMmu
     EXPORT  ArmDisableMmu
+    EXPORT  ArmMmuEnabled
     EXPORT  ArmEnableDataCache
     EXPORT  ArmDisableDataCache
     EXPORT  ArmEnableInstructionCache
@@ -77,6 +78,11 @@ ArmEnableMmu
   mcr     p15,0,R0,c1,c0,0
   bx      LR
 
+ArmMmuEnabled
+  mrc     p15,0,R0,c1,c0,0
+  and     R0,R0,#1
+  bx      LR
+
 ArmDisableMmu
   mrc     p15,0,R0,c1,c0,0
   bic     R0,R0,#1