diff options
Diffstat (limited to 'ArmPkg/Library/ArmLib/ArmCortexA/ArmCortexASupport.asm')
| -rw-r--r-- | ArmPkg/Library/ArmLib/ArmCortexA/ArmCortexASupport.asm | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/ArmPkg/Library/ArmLib/ArmCortexA/ArmCortexASupport.asm b/ArmPkg/Library/ArmLib/ArmCortexA/ArmCortexASupport.asm index dbd8bd246a..700942dd17 100644 --- 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 |