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

[mirror_edk2.git] / ArmPkg / Library / ArmLib / ArmCortexA / ArmCortexASupport.asm

diff --git a/ArmPkg/Library/ArmLib/ArmCortexA/ArmCortexASupport.asm b/ArmPkg/Library/ArmLib/ArmCortexA/ArmCortexASupport.asm
index dbd8bd246abde2bfba695eae97ca381dda89deb5..700942dd17d9361db0287e84ecb10a1c9a6fbd53 100644 (file)
--- a/ArmPkg/Library/ArmLib/ArmCortexA/ArmCortexASupport.asm
+++ b/ArmPkg/Library/ArmLib/ArmCortexA/ArmCortexASupport.asm
@@ -22,6 +22,7 @@
     EXPORT  ArmDrainWriteBuffer
     EXPORT  ArmEnableMmu
     EXPORT  ArmDisableMmu
+    EXPORT  ArmMmuEnabled
     EXPORT  ArmEnableDataCache
     EXPORT  ArmDisableDataCache
     EXPORT  ArmEnableInstructionCache
@@ -86,6 +87,11 @@ 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
   mov     R0,#0
   mcr     p15,0,R0,c13,c0,0     ;FCSE PID register must be cleared before disabling MMU