add arm64 support

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

arch/arm64/kernel/include/arch/shm.h

@@ -0,0 +1,41 @@
+/* shm.h COPYRIGHT FUJITSU LIMITED 2015-2016 */
+#ifndef __HEADER_ARM64_ARCH_SHM_H
+#define __HEADER_ARM64_ARCH_SHM_H
+
+#include <arch-memory.h>
+
+/* shmflg */
+#define SHM_HUGE_SHIFT  26
+#if FIRST_LEVEL_BLOCK_SUPPORT
+# define SHM_HUGE_FIRST_BLOCK (__PTL3_SHIFT << SHM_HUGE_SHIFT)
+#else
+# define SHM_HUGE_FIRST_BLOCK -1  /* not supported */
+#endif
+#define SHM_HUGE_SECOND_BLOCK (__PTL2_SHIFT << SHM_HUGE_SHIFT)
+
+struct ipc_perm {
+	key_t		key;
+	uid_t		uid;
+	gid_t		gid;
+	uid_t		cuid;
+	gid_t		cgid;
+	uint16_t	mode;
+	uint8_t		padding[2];
+	uint16_t	seq;
+	uint8_t		padding2[22];
+};
+
+struct shmid_ds {
+	struct ipc_perm	shm_perm;
+	size_t		shm_segsz;
+	time_t		shm_atime;
+	time_t		shm_dtime;
+	time_t		shm_ctime;
+	pid_t		shm_cpid;
+	pid_t		shm_lpid;
+	uint64_t	shm_nattch;
+	uint8_t		padding[12];
+	int		init_pgshift;
+};
+
+#endif /* __HEADER_ARM64_ARCH_SHM_H */