[Feature]add MT2731_MP2_MR2_SVN388 baseline version

Change-Id: Ief04314834b31e27effab435d3ca8ba33b499059
diff --git a/src/bsp/lk/arch/mips/asm.S b/src/bsp/lk/arch/mips/asm.S
new file mode 100644
index 0000000..7700039
--- /dev/null
+++ b/src/bsp/lk/arch/mips/asm.S
@@ -0,0 +1,60 @@
+/*
+ * Copyright (c) 2015 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 <asm.h>
+
+/* void mips_context_switch(
+    struct mips_context_switch_frame *oldcs,
+    struct mips_context_switch_frame *newcs); */
+FUNCTION(mips_context_switch)
+    # a0 = oldcs
+    # a1 = newcs
+
+    # save old state
+    sw      $s0, 0($a0)
+    sw      $s1, 4($a0)
+    sw      $s2, 8($a0)
+    sw      $s3, 12($a0)
+    sw      $s4, 16($a0)
+    sw      $s5, 20($a0)
+    sw      $s6, 24($a0)
+    sw      $s7, 28($a0)
+    sw      $s8, 32($a0)
+    sw      $ra, 36($a0)
+    sw      $sp, 40($a0)
+
+    # load new state
+    lw      $s0, 0($a1)
+    lw      $s1, 4($a1)
+    lw      $s2, 8($a1)
+    lw      $s3, 12($a1)
+    lw      $s4, 16($a1)
+    lw      $s5, 20($a1)
+    lw      $s6, 24($a1)
+    lw      $s7, 28($a1)
+    lw      $s8, 32($a1)
+    lw      $ra, 36($a1)
+    lw      $sp, 40($a1)
+
+    jr      $ra
+    nop
+