ia64/xen: introduce helper function to identify domain mode.

/******************************************************************************

 * hypervisor.h

 *

 * Linux-specific hypervisor handling.

 *

 * Copyright (c) 2002-2004, K A Fraser

 *

 * This program is free software; you can redistribute it and/or

 * modify it under the terms of the GNU General Public License version 2

 * as published by the Free Software Foundation; or, when distributed

 * separately from the Linux kernel or incorporated into other

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 */

#ifndef _ASM_IA64_XEN_HYPERVISOR_H

#define _ASM_IA64_XEN_HYPERVISOR_H

#ifdef CONFIG_XEN

#include <linux/init.h>

#include <xen/interface/xen.h>

#include <xen/interface/version.h>	/* to compile feature.c */

#include <xen/features.h>		/* to comiple xen-netfront.c */

#include <asm/xen/hypercall.h>

/* xen_domain_type is set before executing any C code by early_xen_setup */

enum xen_domain_type {

	XEN_NATIVE,

	XEN_PV_DOMAIN,

	XEN_HVM_DOMAIN,

};

extern enum xen_domain_type xen_domain_type;

#define xen_domain()		(xen_domain_type != XEN_NATIVE)

#define xen_pv_domain()		(xen_domain_type == XEN_PV_DOMAIN)

#define xen_initial_domain()	(xen_pv_domain() && \

				 (xen_start_info->flags & SIF_INITDOMAIN))

#define xen_hvm_domain()	(xen_domain_type == XEN_HVM_DOMAIN)

/* deprecated. remove this */

#define is_running_on_xen()	(xen_domain_type == XEN_PV_DOMAIN)

extern struct start_info *xen_start_info;

#else /* CONFIG_XEN */

#define xen_domain()		(0)

#define xen_pv_domain()		(0)

#define xen_initial_domain()	(0)

#define xen_hvm_domain()	(0)

#define is_running_on_xen()	(0)	/* deprecated. remove this */

#endif

#define is_initial_xendomain()	(0)	/* deprecated. remove this */

#endif /* _ASM_IA64_XEN_HYPERVISOR_H */