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page.h
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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 */