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

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

diff --git a/ArmPkg/Library/ArmLib/Arm9/Arm9Support.S b/ArmPkg/Library/ArmLib/Arm9/Arm9Support.S
index 5c9afe9347704a55b65fad93b06f42b88c3b936f..d76afb90f596d4341f8e3b2688d43275d3b59f0d 100644 (file)
--- a/ArmPkg/Library/ArmLib/Arm9/Arm9Support.S
+++ b/ArmPkg/Library/ArmLib/Arm9/Arm9Support.S
@@ -23,6 +23,7 @@
 .globl ASM_PFX(ArmCleanInvalidateDataCacheEntryByMVA)
 .globl ASM_PFX(ArmEnableMmu)
 .globl ASM_PFX(ArmDisableMmu)
+.globl ASM_PFX(ArmMmuEnabled)
 .globl ASM_PFX(ArmEnableDataCache)
 .globl ASM_PFX(ArmDisableDataCache)
 .globl ASM_PFX(ArmEnableInstructionCache)
@@ -75,6 +76,11 @@ ASM_PFX(ArmEnableMmu):
   mcr     p15,0,R0,c1,c0,0
   bx      LR
 
+ASM_PFX(ArmMmuEnabled):
+  mrc     p15,0,R0,c1,c0,0
+  and     R0,R0,#1
+  bx      LR
+
 ASM_PFX(ArmDisableMmu):
   mrc     p15,0,R0,c1,c0,0
   bic     R0,R0,#1