nds32: Support AE3XX platform.

Support Andestech AE3xx platform: serial, timer device tree flow.

Signed-off-by: rick <rick@andestech.com>
diff --git a/arch/nds32/include/asm/bootm.h b/arch/nds32/include/asm/bootm.h
new file mode 100644
index 0000000..6b10c07
--- /dev/null
+++ b/arch/nds32/include/asm/bootm.h
@@ -0,0 +1,65 @@
+/*
+ * Copyright (c) 2013, Google Inc.
+ *
+ * Copyright (C) 2011
+ * Corscience GmbH & Co. KG - Simon Schwarz <schwarz@corscience.de>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+#ifndef NDS32_BOOTM_H
+#define NDS32_BOOTM_H
+
+extern void udc_disconnect(void);
+
+#if defined(CONFIG_SETUP_MEMORY_TAGS) || \
+		defined(CONFIG_CMDLINE_TAG) || \
+		defined(CONFIG_INITRD_TAG) || \
+		defined(CONFIG_SERIAL_TAG) || \
+		defined(CONFIG_REVISION_TAG)
+# define BOOTM_ENABLE_TAGS		1
+#else
+# define BOOTM_ENABLE_TAGS		0
+#endif
+
+#ifdef CONFIG_SETUP_MEMORY_TAGS
+# define BOOTM_ENABLE_MEMORY_TAGS	1
+#else
+# define BOOTM_ENABLE_MEMORY_TAGS	0
+#endif
+
+#ifdef CONFIG_CMDLINE_TAG
+ #define BOOTM_ENABLE_CMDLINE_TAG	1
+#else
+ #define BOOTM_ENABLE_CMDLINE_TAG	0
+#endif
+
+#ifdef CONFIG_INITRD_TAG
+ #define BOOTM_ENABLE_INITRD_TAG	1
+#else
+ #define BOOTM_ENABLE_INITRD_TAG	0
+#endif
+
+#ifdef CONFIG_SERIAL_TAG
+ #define BOOTM_ENABLE_SERIAL_TAG	1
+void get_board_serial(struct tag_serialnr *serialnr);
+#else
+ #define BOOTM_ENABLE_SERIAL_TAG	0
+static inline void get_board_serial(struct tag_serialnr *serialnr)
+{
+}
+#endif
+
+#ifdef CONFIG_REVISION_TAG
+ #define BOOTM_ENABLE_REVISION_TAG	1
+u32 get_board_rev(void);
+#else
+ #define BOOTM_ENABLE_REVISION_TAG	0
+static inline u32 get_board_rev(void)
+{
+	return 0;
+}
+#endif
+
+#endif