arch/ia64/include/asm/xen/page.h

   1 /******************************************************************************
   2  * arch/ia64/include/asm/xen/page.h
   3  *
   4  * Copyright (c) 2008 Isaku Yamahata <yamahata at valinux co jp>
   5  *                    VA Linux Systems Japan K.K.
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 2 of the License, or
  10  * (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, write to the Free Software
  19  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  20  *
  21  */
  22
  23 #ifndef _ASM_IA64_XEN_PAGE_H
  24 #define _ASM_IA64_XEN_PAGE_H
  25
  26 #define INVALID_P2M_ENTRY       (~0UL)
  27
  28 static inline unsigned long mfn_to_pfn(unsigned long mfn)
  29 {
  30         return mfn;
  31 }
  32
  33 static inline unsigned long pfn_to_mfn(unsigned long pfn)
  34 {
  35         return pfn;
  36 }
  37
  38 #define phys_to_machine_mapping_valid(_x)       (1)
  39
  40 static inline void *mfn_to_virt(unsigned long mfn)
  41 {
  42         return __va(mfn << PAGE_SHIFT);
  43 }
  44
  45 static inline unsigned long virt_to_mfn(void *virt)
  46 {
  47         return __pa(virt) >> PAGE_SHIFT;
  48 }
  49
  50 /* for tpmfront.c */
  51 static inline unsigned long virt_to_machine(void *virt)
  52 {
  53         return __pa(virt);
  54 }
  55
  56 static inline void set_phys_to_machine(unsigned long pfn, unsigned long mfn)
  57 {
  58         /* nothing */
  59 }
  60
  61 #define pte_mfn(_x)     pte_pfn(_x)
  62 #define mfn_pte(_x, _y) __pte_ma(0)             /* unmodified use */
  63 #define __pte_ma(_x)    ((pte_t) {(_x)})        /* unmodified use */
  64
  65 #endif /* _ASM_IA64_XEN_PAGE_H */