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ia64/xen: define helper functions for xen related address conversion.

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Xen needs some address conversions between pseudo physical
address (guest phsyical address), guest machine address
(real machine address) and dma address.
Define helper functions for those address conversion.

Cc: Jeremy Fitzhardinge <jeremy@goop.org>
Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>
Signed-off-by: Tony Luck <tony.luck@intel.com>
This commit is contained in:
Isaku Yamahata 2008-10-17 11:17:51 +09:00 committed by Tony Luck
parent 25c7bfaef2
commit 67fe8d27a8
1 changed files with 65 additions and 0 deletions
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65
arch/ia64/include/asm/xen/page.h Normal file
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/******************************************************************************
* 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 */