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 static inline unsigned long pfn_to_mfn(unsigned long pfn) 38 { 39 unsigned long mfn; 40 41 if (phys_to_mach.rb_node != NULL) { 42 mfn = __pfn_to_mfn(pfn); 43 if (mfn != INVALID_P2M_ENTRY) 44 return mfn; 45 } 46 47 return pfn; 48 } 49 50 static inline unsigned long mfn_to_pfn(unsigned long mfn) 51 { 52 return mfn; 53 } 54 55 #define mfn_to_local_pfn(mfn) mfn_to_pfn(mfn) 56 57 /* VIRT <-> MACHINE conversion */ 58 #define virt_to_mfn(v) (pfn_to_mfn(virt_to_pfn(v))) 59 #define mfn_to_virt(m) (__va(mfn_to_pfn(m) << PAGE_SHIFT)) 60 61 /* Only used in PV code. But ARM guests are always HVM. */ 62 static inline xmaddr_t arbitrary_virt_to_machine(void *vaddr) 63 { 64 BUG(); 65 } 66 67 /* TODO: this shouldn't be here but it is because the frontend drivers 68 * are using it (its rolled in headers) even though we won't hit the code path. 69 * So for right now just punt with this. 70 */ 71 static inline pte_t *lookup_address(unsigned long address, unsigned int *level) 72 { 73 BUG(); 74 return NULL; 75 } 76 77 extern int set_foreign_p2m_mapping(struct gnttab_map_grant_ref *map_ops, 78 struct gnttab_map_grant_ref *kmap_ops, 79 struct page **pages, unsigned int count); 80 81 extern int clear_foreign_p2m_mapping(struct gnttab_unmap_grant_ref *unmap_ops, 82 struct gnttab_unmap_grant_ref *kunmap_ops, 83 struct page **pages, unsigned int count); 84 85 bool __set_phys_to_machine(unsigned long pfn, unsigned long mfn); 86 bool __set_phys_to_machine_multi(unsigned long pfn, unsigned long mfn, 87 unsigned long nr_pages); 88 89 static inline bool set_phys_to_machine(unsigned long pfn, unsigned long mfn) 90 { 91 return __set_phys_to_machine(pfn, mfn); 92 } 93 94 #define xen_remap(cookie, size) ioremap_cache((cookie), (size)) 95 #define xen_unmap(cookie) iounmap((cookie)) 96 97 bool xen_arch_need_swiotlb(struct device *dev, 98 unsigned long pfn, 99 unsigned long mfn); 100 unsigned long xen_get_swiotlb_free_pages(unsigned int order); 101 102 #endif /* _ASM_ARM_XEN_PAGE_H */ 103