[Feature]add MT2731_MP2_MR2_SVN388 baseline version
Change-Id: Ief04314834b31e27effab435d3ca8ba33b499059
diff --git a/src/kernel/linux/v4.14/arch/powerpc/boot/virtex405-head.S b/src/kernel/linux/v4.14/arch/powerpc/boot/virtex405-head.S
new file mode 100644
index 0000000..00bab7d
--- /dev/null
+++ b/src/kernel/linux/v4.14/arch/powerpc/boot/virtex405-head.S
@@ -0,0 +1,31 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#include "ppc_asm.h"
+
+ .text
+ .global _zimage_start
+_zimage_start:
+
+ /* PPC errata 213: needed by Virtex-4 FX */
+ mfccr0 0
+ oris 0,0,0x50000000@h
+ mtccr0 0
+
+ /*
+ * Invalidate the data cache if the data cache is turned off.
+ * - The 405 core does not invalidate the data cache on power-up
+ * or reset but does turn off the data cache. We cannot assume
+ * that the cache contents are valid.
+ * - If the data cache is turned on this must have been done by
+ * a bootloader and we assume that the cache contents are
+ * valid.
+ */
+ mfdccr r9
+ cmplwi r9,0
+ bne 2f
+ lis r9,0
+ li r8,256
+ mtctr r8
+1: dccci r0,r9
+ addi r9,r9,0x20
+ bdnz 1b
+2: b _zimage_start_lib