1. 根目录:
2. arch
3. ia64
4. include
5. asm
6. xen
7. page.h

/******************************************************************************
 * arch/ia64/include/asm/xen/page.h
 *
 * Copyright (c) 2008 Isaku Yamahata <yamahata at valinux co jp>
 *                    VA Linux Systems Japan K.K.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 */

#ifndef _ASM_IA64_XEN_PAGE_H
#define _ASM_IA64_XEN_PAGE_H

#define INVALID_P2M_ENTRY	(~0UL)

static inline unsigned long mfn_to_pfn(unsigned long mfn)
{
	return mfn;
}

static inline unsigned long pfn_to_mfn(unsigned long pfn)
{
	return pfn;
}

#define phys_to_machine_mapping_valid(_x)	(1)

static inline void *mfn_to_virt(unsigned long mfn)
{
	return __va(mfn << PAGE_SHIFT);
}

static inline unsigned long virt_to_mfn(void *virt)
{
	return __pa(virt) >> PAGE_SHIFT;
}

/* for tpmfront.c */
static inline unsigned long virt_to_machine(void *virt)
{
	return __pa(virt);
}

static inline void set_phys_to_machine(unsigned long pfn, unsigned long mfn)
{
	/* nothing */
}

#define pte_mfn(_x)	pte_pfn(_x)
#define mfn_pte(_x, _y)	__pte_ma(0)		/* unmodified use */
#define __pte_ma(_x)	((pte_t) {(_x)})        /* unmodified use */

#endif /* _ASM_IA64_XEN_PAGE_H */