[Feature]add MT2731_MP2_MR2_SVN388 baseline version

Change-Id: Ief04314834b31e27effab435d3ca8ba33b499059
diff --git a/src/bsp/lk/arch/arm/arm-m/start.c b/src/bsp/lk/arch/arm/arm-m/start.c
new file mode 100644
index 0000000..323231b
--- /dev/null
+++ b/src/bsp/lk/arch/arm/arm-m/start.c
@@ -0,0 +1,50 @@
+/*
+ * Copyright (c) 2012 Travis Geiselbrecht
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files
+ * (the "Software"), to deal in the Software without restriction,
+ * including without limitation the rights to use, copy, modify, merge,
+ * publish, distribute, sublicense, and/or sell copies of the Software,
+ * and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+ * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+ * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+ * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+#include <debug.h>
+#include <compiler.h>
+#include <stdint.h>
+
+/* externals */
+extern unsigned int __data_start_rom, __data_start, __data_end;
+extern unsigned int __bss_start, __bss_end;
+
+extern void lk_main(void) __NO_RETURN __EXTERNALLY_VISIBLE;
+
+void _start(void)
+{
+    /* copy data from rom */
+    if (&__data_start != &__data_start_rom) {
+        unsigned int *src = &__data_start_rom;
+        unsigned int *dest = &__data_start;
+
+        while (dest != &__data_end)
+            *dest++ = *src++;
+    }
+
+    /* zero out bss */
+    unsigned int *bss = &__bss_start;
+    while (bss != &__bss_end)
+        *bss++ = 0;
+
+    lk_main();
+}