1 files changed, 29 insertions, 0 deletions
diff --git a/roms/edk2/MdePkg/Library/BaseLib/Arm/DisableInterrupts.S b/roms/edk2/MdePkg/Library/BaseLib/Arm/DisableInterrupts.S
new file mode 100644
index 000000000..1f3fe7cc9
--- /dev/null
+++ b/roms/edk2/MdePkg/Library/BaseLib/Arm/DisableInterrupts.S
@@ -0,0 +1,29 @@
+#------------------------------------------------------------------------------
+#
+# DisableInterrupts() for ARM
+#
+# Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
+# Portions copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
+# SPDX-License-Identifier: BSD-2-Clause-Patent
+#
+#------------------------------------------------------------------------------
+
+.text
+.p2align 2
+GCC_ASM_EXPORT(DisableInterrupts)
+
+#/**
+#  Disables CPU interrupts.
+#
+#**/
+#VOID
+#EFIAPI
+#DisableInterrupts (
+#  VOID
+#  );
+#
+ASM_PFX(DisableInterrupts):
+    mrs  R0,CPSR
+    orr  R0,R0,#0x80    @Disable IRQ interrupts
+    msr  CPSR_c,R0
+    bx   LR