add arm64 support

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

arch/arm64/kernel/smp.c

@@ -0,0 +1,22 @@
+/* smp.c COPYRIGHT FUJITSU LIMITED 2015 */
+
+#include <thread_info.h>
+#include <smp.h>
+
+/*
+ * as from 2.5, kernels no longer have an init_tasks structure
+ * so we need some other way of telling a new secondary core
+ * where to place its SVC stack
+ */
+
+/* initialize value for BSP bootup */
+/* AP bootup value setup in ihk_mc_boot_cpu() */
+struct start_kernel_param;
+extern void start_kernel(struct start_kernel_param *param);
+extern struct start_kernel_param *ihk_param_head;
+
+struct secondary_data secondary_data = {
+	.stack = (char *)&init_thread_info + THREAD_START_SP,
+	.next_pc = (uint64_t)start_kernel,
+	.arg = (unsigned long)&ihk_param_head
+};