1 #ifndef _ASM_ARM_XEN_PAGE_H
2 #define _ASM_ARM_XEN_PAGE_H
5 #include <asm/pgtable.h>
8 #include <linux/types.h>
10 #include <xen/interface/grant_table.h>
12 #define pfn_to_mfn(pfn) (pfn)
13 #define phys_to_machine_mapping_valid (1)
14 #define mfn_to_pfn(mfn) (mfn)
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 static inline xmaddr_t phys_to_machine(xpaddr_t phys)
35 unsigned offset = phys.paddr & ~PAGE_MASK;
36 return XMADDR(PFN_PHYS(pfn_to_mfn(PFN_DOWN(phys.paddr))) | offset);
39 static inline xpaddr_t machine_to_phys(xmaddr_t machine)
41 unsigned offset = machine.maddr & ~PAGE_MASK;
42 return XPADDR(PFN_PHYS(mfn_to_pfn(PFN_DOWN(machine.maddr))) | offset);
44 /* VIRT <-> MACHINE conversion */
45 #define virt_to_machine(v) (phys_to_machine(XPADDR(__pa(v))))
46 #define virt_to_pfn(v) (PFN_DOWN(__pa(v)))
47 #define virt_to_mfn(v) (pfn_to_mfn(virt_to_pfn(v)))
48 #define mfn_to_virt(m) (__va(mfn_to_pfn(m) << PAGE_SHIFT))
50 static inline xmaddr_t arbitrary_virt_to_machine(void *vaddr)
52 /* TODO: assuming it is mapped in the kernel 1:1 */
53 return virt_to_machine(vaddr);
56 /* TODO: this shouldn't be here but it is because the frontend drivers
57 * are using it (its rolled in headers) even though we won't hit the code path.
58 * So for right now just punt with this.
60 static inline pte_t *lookup_address(unsigned long address, unsigned int *level)
66 static inline int m2p_add_override(unsigned long mfn, struct page *page,
67 struct gnttab_map_grant_ref *kmap_op)
72 static inline int m2p_remove_override(struct page *page, bool clear_pte)
77 static inline bool set_phys_to_machine(unsigned long pfn, unsigned long mfn)
82 #endif /* _ASM_ARM_XEN_PAGE_H */