Adding Hello World Example Runing from Internal SRAM and NAND

Examples/hello_sram/build/start.S

@@ -0,0 +1,43 @@
+/*
+ * Copyright (c) 2009, yajin <yajin@vm-kernel.org>
+ * Copyright (c) 2005-2008  Ingenic Semiconductor Inc.
+ * Author: <jlwei@ingenic.cn>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ */
+
+#include <jz4740.h>
+#include <board.h>
+
+	.text
+	.set noreorder
+	.global startup
+startup:
+	/*
+	 * Disable all interrupts
+	 */
+	la	$8, 0xB0001004		/* INTC_IMR */
+	li	$9, 0xffffffff
+	sw	$9, 0($8)
+
+	/* 
+	 * CU0=UM=EXL=IE=0, BEV=ERL=1, IP2~7=1
+	 */
+	li	$26, 0x0040FC04
+	mtc0	$26, $12		/* CP0_STATUS */
+
+	/* IV=1, use the specical interrupt vector (0x200) */
+	li	$26, 0x00800000
+	mtc0	$26, $13		/* CP0_CAUSE */
+
+	/* Setup stack pointer */
+	la	$29, 0x81000000
+
+	/* Jump to the main routine */
+	j	main_func
+	nop
+	.set reorder
+