add arm64 support

- add arm64 dependent codes with GICv3 and SVE support
- fix bugs based on architecture separation requests

arch/arm64/kernel/include/smp.h

@@ -0,0 +1,23 @@
+/* smp.h COPYRIGHT FUJITSU LIMITED 2015 */
+#ifndef __HEADER_ARM64_COMMON_SMP_H
+#define __HEADER_ARM64_COMMON_SMP_H
+
+#ifndef __ASSEMBLY__
+/*
+ * Initial data for bringing up a secondary CPU.
+ */
+struct secondary_data {
+	void *stack;
+	unsigned long next_pc;
+	unsigned long arg;
+};
+extern struct secondary_data secondary_data;
+
+#endif /* __ASSEMBLY__ */
+
+/* struct secondary_data offsets */
+#define SECONDARY_DATA_STACK	0x00
+#define SECONDARY_DATA_NEXT_PC	0x08
+#define SECONDARY_DATA_ARG	0x10
+
+#endif /* !__HEADER_ARM64_COMMON_SMP_H */