ArmPkg: Add helper function to read the Memory Model Feature Register 4

[mirror_edk2.git] / ArmPkg / Library / ArmLib / Arm / ArmLibSupportV7.S

diff --git a/ArmPkg/Library/ArmLib/Arm/ArmLibSupportV7.S b/ArmPkg/Library/ArmLib/Arm/ArmLibSupportV7.S
index 01c91b10fcb72f195736fdd512aa82c97a85c458..a60a2f6341322da78b2ff92b38268266c7331157 100644 (file)
--- a/ArmPkg/Library/ArmLib/Arm/ArmLibSupportV7.S
+++ b/ArmPkg/Library/ArmLib/Arm/ArmLibSupportV7.S
@@ -60,6 +60,10 @@ ASM_FUNC(ArmDisableInterrupts)
   isb\r
   bx      LR\r
 \r
+ASM_FUNC(ArmReadIdMmfr4)\r
+  mrc    p15,0,r0,c0,c2,6     @ Read ID_MMFR4 Register\r
+  bx     lr\r
+\r
 // UINT32\r
 // ReadCCSIDR (\r
 //   IN UINT32 CSSELR\r