1 #ifndef _ASM_ARM_XEN_PAGE_H 2 #define _ASM_ARM_XEN_PAGE_H 3 4 #include <asm/page.h> 5 #include <asm/pgtable.h> 6 7 #include <linux/pfn.h> 8 #include <linux/types.h> 9 #include <linux/dma-mapping.h> 10 11 #include <xen/xen.h> 12 #include <xen/interface/grant_table.h> 13 14 #define phys_to_machine_mapping_valid(pfn) (1) 15 16 #define pte_mfn pte_pfn 17 #define mfn_pte pfn_pte 18 19 /* Xen machine address */ 20 typedef struct xmaddr { 21 phys_addr_t maddr; 22 } xmaddr_t; 23 24 /* Xen pseudo-physical address */ 25 typedef struct xpaddr { 26 phys_addr_t paddr; 27 } xpaddr_t; 28 29 #define XMADDR(x) ((xmaddr_t) { .maddr = (x) }) 30 #define XPADDR(x) ((xpaddr_t) { .paddr = (x) }) 31 32 #define INVALID_P2M_ENTRY (~0UL) 33 34 unsigned long __pfn_to_mfn(unsigned long pfn); 35 extern struct rb_root phys_to_mach; 36 37 /* Pseudo-physical <-> Guest conversion */ 38 static inline unsigned long pfn_to_gfn(unsigned long pfn) 39 { 40 return pfn; 41 } 42 43 static inline unsigned long gfn_to_pfn(unsigned long gfn) 44 { 45 return gfn; 46 } 47 48 /* Pseudo-physical <-> BUS conversion */ 49 static inline unsigned long pfn_to_bfn(unsigned long pfn) 50 { 51 unsigned long mfn; 52 53 if (phys_to_mach.rb_node != NULL) { 54 mfn = __pfn_to_mfn(pfn); 55 if (mfn != INVALID_P2M_ENTRY) 56 return mfn; 57 } 58 59 return pfn; 60 } 61 62 static inline unsigned long bfn_to_pfn(unsigned long bfn) 63 { 64 return bfn; 65 } 66 67 #define bfn_to_local_pfn(bfn) bfn_to_pfn(bfn) 68 69 /* VIRT <-> GUEST conversion */ 70 #define virt_to_gfn(v) (pfn_to_gfn(virt_to_pfn(v))) 71 #define gfn_to_virt(m) (__va(gfn_to_pfn(m) << PAGE_SHIFT)) 72 73 /* Only used in PV code. But ARM guests are always HVM. */ 74 static inline xmaddr_t arbitrary_virt_to_machine(void *vaddr) 75 { 76 BUG(); 77 } 78 79 /* TODO: this shouldn't be here but it is because the frontend drivers 80 * are using it (its rolled in headers) even though we won't hit the code path. 81 * So for right now just punt with this. 82 */ 83 static inline pte_t *lookup_address(unsigned long address, unsigned int *level) 84 { 85 BUG(); 86 return NULL; 87 } 88 89 extern int set_foreign_p2m_mapping(struct gnttab_map_grant_ref *map_ops, 90 struct gnttab_map_grant_ref *kmap_ops, 91 struct page **pages, unsigned int count); 92 93 extern int clear_foreign_p2m_mapping(struct gnttab_unmap_grant_ref *unmap_ops, 94 struct gnttab_unmap_grant_ref *kunmap_ops, 95 struct page **pages, unsigned int count); 96 97 bool __set_phys_to_machine(unsigned long pfn, unsigned long mfn); 98 bool __set_phys_to_machine_multi(unsigned long pfn, unsigned long mfn, 99 unsigned long nr_pages); 100 101 static inline bool set_phys_to_machine(unsigned long pfn, unsigned long mfn) 102 { 103 return __set_phys_to_machine(pfn, mfn); 104 } 105 106 #define xen_remap(cookie, size) ioremap_cache((cookie), (size)) 107 #define xen_unmap(cookie) iounmap((cookie)) 108 109 bool xen_arch_need_swiotlb(struct device *dev, 110 unsigned long pfn, 111 unsigned long bfn); 112 unsigned long xen_get_swiotlb_free_pages(unsigned int order); 113 114 #endif /* _ASM_ARM_XEN_PAGE_H */ 115