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git.proxmox.com Git - mirror_ubuntu-artful-kernel.git/blob - arch/arm/include/asm/xen/page.h
1 #ifndef _ASM_ARM_XEN_PAGE_H
2 #define _ASM_ARM_XEN_PAGE_H
5 #include <asm/pgtable.h>
8 #include <linux/types.h>
9 #include <linux/dma-mapping.h>
12 #include <xen/interface/grant_table.h>
14 #define phys_to_machine_mapping_valid(pfn) (1)
15 #define mfn_to_virt(m) (__va(mfn_to_pfn(m) << PAGE_SHIFT))
17 #define pte_mfn pte_pfn
18 #define mfn_pte pfn_pte
20 /* Xen machine address */
21 typedef struct xmaddr
{
25 /* Xen pseudo-physical address */
26 typedef struct xpaddr
{
30 #define XMADDR(x) ((xmaddr_t) { .maddr = (x) })
31 #define XPADDR(x) ((xpaddr_t) { .paddr = (x) })
33 #define INVALID_P2M_ENTRY (~0UL)
35 unsigned long __pfn_to_mfn(unsigned long pfn
);
36 unsigned long __mfn_to_pfn(unsigned long mfn
);
37 extern struct rb_root phys_to_mach
;
39 static inline unsigned long pfn_to_mfn(unsigned long pfn
)
43 if (phys_to_mach
.rb_node
!= NULL
) {
44 mfn
= __pfn_to_mfn(pfn
);
45 if (mfn
!= INVALID_P2M_ENTRY
)
52 static inline unsigned long mfn_to_pfn(unsigned long mfn
)
56 if (phys_to_mach
.rb_node
!= NULL
) {
57 pfn
= __mfn_to_pfn(mfn
);
58 if (pfn
!= INVALID_P2M_ENTRY
)
65 #define mfn_to_local_pfn(mfn) mfn_to_pfn(mfn)
67 static inline xmaddr_t
phys_to_machine(xpaddr_t phys
)
69 unsigned offset
= phys
.paddr
& ~PAGE_MASK
;
70 return XMADDR(PFN_PHYS(pfn_to_mfn(PFN_DOWN(phys
.paddr
))) | offset
);
73 static inline xpaddr_t
machine_to_phys(xmaddr_t machine
)
75 unsigned offset
= machine
.maddr
& ~PAGE_MASK
;
76 return XPADDR(PFN_PHYS(mfn_to_pfn(PFN_DOWN(machine
.maddr
))) | offset
);
78 /* VIRT <-> MACHINE conversion */
79 #define virt_to_machine(v) (phys_to_machine(XPADDR(__pa(v))))
80 #define virt_to_pfn(v) (PFN_DOWN(__pa(v)))
81 #define virt_to_mfn(v) (pfn_to_mfn(virt_to_pfn(v)))
82 #define mfn_to_virt(m) (__va(mfn_to_pfn(m) << PAGE_SHIFT))
84 static inline xmaddr_t
arbitrary_virt_to_machine(void *vaddr
)
86 /* TODO: assuming it is mapped in the kernel 1:1 */
87 return virt_to_machine(vaddr
);
90 /* TODO: this shouldn't be here but it is because the frontend drivers
91 * are using it (its rolled in headers) even though we won't hit the code path.
92 * So for right now just punt with this.
94 static inline pte_t
*lookup_address(unsigned long address
, unsigned int *level
)
100 extern int set_foreign_p2m_mapping(struct gnttab_map_grant_ref
*map_ops
,
101 struct gnttab_map_grant_ref
*kmap_ops
,
102 struct page
**pages
, unsigned int count
);
104 extern int clear_foreign_p2m_mapping(struct gnttab_unmap_grant_ref
*unmap_ops
,
105 struct gnttab_map_grant_ref
*kmap_ops
,
106 struct page
**pages
, unsigned int count
);
108 bool __set_phys_to_machine(unsigned long pfn
, unsigned long mfn
);
109 bool __set_phys_to_machine_multi(unsigned long pfn
, unsigned long mfn
,
110 unsigned long nr_pages
);
112 static inline bool set_phys_to_machine(unsigned long pfn
, unsigned long mfn
)
114 return __set_phys_to_machine(pfn
, mfn
);
117 #define xen_remap(cookie, size) ioremap_cache((cookie), (size))
118 #define xen_unmap(cookie) iounmap((cookie))
120 #endif /* _ASM_ARM_XEN_PAGE_H */