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)
16 /* Xen machine address */
17 typedef struct xmaddr {
21 /* Xen pseudo-physical address */
22 typedef struct xpaddr {
26 #define XMADDR(x) ((xmaddr_t) { .maddr = (x) })
27 #define XPADDR(x) ((xpaddr_t) { .paddr = (x) })
29 #define INVALID_P2M_ENTRY (~0UL)
31 unsigned long __pfn_to_mfn(unsigned long pfn);
32 extern struct rb_root phys_to_mach;
34 /* Pseudo-physical <-> Guest conversion */
35 static inline unsigned long pfn_to_gfn(unsigned long pfn)
40 static inline unsigned long gfn_to_pfn(unsigned long gfn)
45 /* Pseudo-physical <-> BUS conversion */
46 static inline unsigned long pfn_to_bfn(unsigned long pfn)
50 if (phys_to_mach.rb_node != NULL) {
51 mfn = __pfn_to_mfn(pfn);
52 if (mfn != INVALID_P2M_ENTRY)
59 static inline unsigned long bfn_to_pfn(unsigned long bfn)
64 #define bfn_to_local_pfn(bfn) bfn_to_pfn(bfn)
66 /* VIRT <-> GUEST conversion */
67 #define virt_to_gfn(v) (pfn_to_gfn(virt_to_pfn(v)))
68 #define gfn_to_virt(m) (__va(gfn_to_pfn(m) << PAGE_SHIFT))
70 /* Only used in PV code. But ARM guests are always HVM. */
71 static inline xmaddr_t arbitrary_virt_to_machine(void *vaddr)
76 /* TODO: this shouldn't be here but it is because the frontend drivers
77 * are using it (its rolled in headers) even though we won't hit the code path.
78 * So for right now just punt with this.
80 static inline pte_t *lookup_address(unsigned long address, unsigned int *level)
86 extern int set_foreign_p2m_mapping(struct gnttab_map_grant_ref *map_ops,
87 struct gnttab_map_grant_ref *kmap_ops,
88 struct page **pages, unsigned int count);
90 extern int clear_foreign_p2m_mapping(struct gnttab_unmap_grant_ref *unmap_ops,
91 struct gnttab_unmap_grant_ref *kunmap_ops,
92 struct page **pages, unsigned int count);
94 bool __set_phys_to_machine(unsigned long pfn, unsigned long mfn);
95 bool __set_phys_to_machine_multi(unsigned long pfn, unsigned long mfn,
96 unsigned long nr_pages);
98 static inline bool set_phys_to_machine(unsigned long pfn, unsigned long mfn)
100 return __set_phys_to_machine(pfn, mfn);
103 #define xen_remap(cookie, size) ioremap_cache((cookie), (size))
104 #define xen_unmap(cookie) iounmap((cookie))
106 bool xen_arch_need_swiotlb(struct device *dev,
109 unsigned long xen_get_swiotlb_free_pages(unsigned int order);
111 #endif /* _ASM_ARM_XEN_PAGE_H */