1 files changed, 22 insertions, 0 deletions
diff --git a/arch/riscv/lib/semihosting.S b/arch/riscv/lib/semihosting.S
new file mode 100644
index 00000000000..c0c571bce9b
--- /dev/null
+++ b/arch/riscv/lib/semihosting.S
@@ -0,0 +1,22 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright (C) 2022 Ventana Micro Systems Inc.
+ */
+
+#include <asm/asm.h>
+#include <linux/linkage.h>
+
+.pushsection .text.smh_trap, "ax"
+ENTRY(smh_trap)
+	.align	2
+	.option	push
+	.option	norvc		/* semihosting sequence must be 32-bit wide */
+
+	slli zero, zero, 0x1f	/* Entry NOP to identify semihosting */
+	ebreak
+	srai zero, zero, 7	/* NOP encoding of semihosting call number */
+	.option pop
+
+	ret
+ENDPROC(smh_trap)
+.popsection