Initial commit.

Signed-off-by: Anup Patel <anup.patel@wdc.com>

blob/fw_jump.S

@@ -0,0 +1,44 @@
+/*
+ * Copyright (c) 2018 Western Digital Corporation or its affiliates.
+ *
+ * Authors:
+ *   Anup Patel <anup.patel@wdc.com>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#include "fw_common.S"
+
+	.align 3
+	.section .entry, "ax", %progbits
+	.global fw_next_arg1
+fw_next_arg1:
+	/* We return FDT destinetion address in 'a0' */
+#ifdef FW_JUMP_FDT_OFFSET
+	/* a0 = destinetion FDT start address */
+	la	a0, _jump_addr
+	REG_L	a0, (a0)
+	li	a1, FW_JUMP_FDT_OFFSET
+	add	a0, a0, a1
+#else
+	add	a0, zero, zero
+#endif
+	ret
+
+	.align 3
+	.section .entry, "ax", %progbits
+	.global fw_next_addr
+fw_next_addr:
+	/* We return next address in 'a0' */
+	la	a0, _jump_addr
+	REG_L	a0, (a0)
+	ret
+
+#ifndef FW_JUMP_ADDR
+#error "Must define FW_JUMP_ADDR"
+#endif
+
+	.align 3
+	.section .entry, "ax", %progbits
+_jump_addr:
+	RISCV_PTR FW_JUMP_ADDR