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_mfn(v) (pfn_to_mfn(virt_to_pfn(v)))
81 #define mfn_to_virt(m) (__va(mfn_to_pfn(m) << PAGE_SHIFT))
83 static inline xmaddr_t arbitrary_virt_to_machine(void *vaddr)
85 /* TODO: assuming it is mapped in the kernel 1:1 */
86 return virt_to_machine(vaddr);
89 /* TODO: this shouldn't be here but it is because the frontend drivers
90 * are using it (its rolled in headers) even though we won't hit the code path.
91 * So for right now just punt with this.
93 static inline pte_t *lookup_address(unsigned long address, unsigned int *level)
99 extern int set_foreign_p2m_mapping(struct gnttab_map_grant_ref *map_ops,
100 struct gnttab_map_grant_ref *kmap_ops,
101 struct page **pages, unsigned int count);
103 extern int clear_foreign_p2m_mapping(struct gnttab_unmap_grant_ref *unmap_ops,
104 struct gnttab_map_grant_ref *kmap_ops,
105 struct page **pages, unsigned int count);
107 bool __set_phys_to_machine(unsigned long pfn, unsigned long mfn);
108 bool __set_phys_to_machine_multi(unsigned long pfn, unsigned long mfn,
109 unsigned long nr_pages);
111 static inline bool set_phys_to_machine(unsigned long pfn, unsigned long mfn)
113 return __set_phys_to_machine(pfn, mfn);
116 #define xen_remap(cookie, size) ioremap_cache((cookie), (size))
117 #define xen_unmap(cookie) iounmap((cookie))
119 #endif /* _ASM_ARM_XEN_PAGE_H */