arm64/xen: introduce asm/xen header files on arm64

#ifndef _ASM_ARM64_HYPERVISOR_H

#define _ASM_ARM64_HYPERVISOR_H

#include <asm/xen/hypervisor.h>

#endif

#ifndef __ASM_SYNC_BITOPS_H__

#define __ASM_SYNC_BITOPS_H__

#include <asm/bitops.h>

#include <asm/cmpxchg.h>

/* sync_bitops functions are equivalent to the SMP implementation of the

 * original functions, independently from CONFIG_SMP being defined.

 *

 * We need them because _set_bit etc are not SMP safe if !CONFIG_SMP. But

 * under Xen you might be communicating with a completely external entity

 * who might be on another CPU (e.g. two uniprocessor guests communicating

 * via event channels and grant tables). So we need a variant of the bit

 * ops which are SMP safe even on a UP kernel.

 */

#define sync_set_bit(nr, p)            set_bit(nr, p)

#define sync_clear_bit(nr, p)          clear_bit(nr, p)

#define sync_change_bit(nr, p)         change_bit(nr, p)

#define sync_test_and_set_bit(nr, p)   test_and_set_bit(nr, p)

#define sync_test_and_clear_bit(nr, p) test_and_clear_bit(nr, p)

#define sync_test_and_change_bit(nr, p)        test_and_change_bit(nr, p)

#define sync_test_bit(nr, addr)                test_bit(nr, addr)

#define sync_cmpxchg                   cmpxchg

#endif

#ifndef _ASM_ARM64_XEN_EVENTS_H

#define _ASM_ARM64_XEN_EVENTS_H

#include <asm/ptrace.h>

#include <asm/atomic.h>

enum ipi_vector {

	XEN_PLACEHOLDER_VECTOR,

	/* Xen IPIs go here */

	XEN_NR_IPIS,

};

static inline int xen_irqs_disabled(struct pt_regs *regs)

{

	return raw_irqs_disabled_flags((unsigned long) regs->pstate);

}

#define xchg_xen_ulong(ptr, val) xchg((ptr), (val))

#endif /* _ASM_ARM64_XEN_EVENTS_H */

#include <../../arm/include/asm/xen/hypercall.h>

#include <../../arm/include/asm/xen/hypervisor.h>