1 files changed, 39 insertions, 0 deletions
diff --git a/arch/riscv/purgatory/entry.S b/arch/riscv/purgatory/entry.S
new file mode 100644
index 000000000000..5bcf3af903da
--- /dev/null
+++ b/arch/riscv/purgatory/entry.S
@@ -0,0 +1,39 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * purgatory: Runs between two kernels
+ *
+ * Copyright (C) 2022 Huawei Technologies Co, Ltd.
+ *
+ * Author: Li Zhengyu (lizhengyu3@huawei.com)
+ *
+ */
+#include <linux/linkage.h>
+
+.text
+
+SYM_CODE_START(purgatory_start)
+
+	lla	sp, .Lstack
+	mv	s0, a0	/* The hartid of the current hart */
+	mv	s1, a1	/* Phys address of the FDT image */
+
+	jal	purgatory
+
+	/* Start new image. */
+	mv	a0, s0
+	mv	a1, s1
+	ld	a2, riscv_kernel_entry
+	jr	a2
+SYM_CODE_END(purgatory_start)
+
+.align 4
+	.rept	256
+	.quad	0
+	.endr
+.Lstack:
+
+.data
+
+SYM_DATA(riscv_kernel_entry, .quad 0)
+
+.end