v4.19.13 snapshot.
diff --git a/arch/nds32/include/asm/assembler.h b/arch/nds32/include/asm/assembler.h
new file mode 100644
index 0000000..c385578
--- /dev/null
+++ b/arch/nds32/include/asm/assembler.h
@@ -0,0 +1,39 @@
+// SPDX-License-Identifier: GPL-2.0
+// Copyright (C) 2005-2017 Andes Technology Corporation
+
+#ifndef __NDS32_ASSEMBLER_H__
+#define __NDS32_ASSEMBLER_H__
+
+.macro gie_disable
+ setgie.d
+ dsb
+.endm
+
+.macro gie_enable
+ setgie.e
+ dsb
+.endm
+
+.macro gie_save oldpsw
+ mfsr \oldpsw, $ir0
+ setgie.d
+ dsb
+.endm
+
+.macro gie_restore oldpsw
+ andi \oldpsw, \oldpsw, #0x1
+ beqz \oldpsw, 7001f
+ setgie.e
+ dsb
+7001:
+.endm
+
+
+#define USER(insn, reg, addr, opr) \
+9999: insn reg, addr, opr; \
+ .section __ex_table,"a"; \
+ .align 3; \
+ .long 9999b, 9001f; \
+ .previous
+
+#endif /* __NDS32_ASSEMBLER_H__ */