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36a67abc SS |
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> | |
83862ccf | 9 | #include <linux/dma-mapping.h> |
36a67abc | 10 | |
4a19138c | 11 | #include <xen/xen.h> |
36a67abc SS |
12 | #include <xen/interface/grant_table.h> |
13 | ||
ee7b5958 | 14 | #define phys_to_machine_mapping_valid(pfn) (1) |
36a67abc SS |
15 | #define mfn_to_virt(m) (__va(mfn_to_pfn(m) << PAGE_SHIFT)) |
16 | ||
17 | #define pte_mfn pte_pfn | |
18 | #define mfn_pte pfn_pte | |
19 | ||
20 | /* Xen machine address */ | |
21 | typedef struct xmaddr { | |
22 | phys_addr_t maddr; | |
23 | } xmaddr_t; | |
24 | ||
25 | /* Xen pseudo-physical address */ | |
26 | typedef struct xpaddr { | |
27 | phys_addr_t paddr; | |
28 | } xpaddr_t; | |
29 | ||
30 | #define XMADDR(x) ((xmaddr_t) { .maddr = (x) }) | |
31 | #define XPADDR(x) ((xpaddr_t) { .paddr = (x) }) | |
32 | ||
ee7b5958 IC |
33 | #define INVALID_P2M_ENTRY (~0UL) |
34 | ||
4a19138c | 35 | unsigned long __pfn_to_mfn(unsigned long pfn); |
4a19138c SS |
36 | extern struct rb_root phys_to_mach; |
37 | ||
38 | static inline unsigned long pfn_to_mfn(unsigned long pfn) | |
39 | { | |
40 | unsigned long mfn; | |
e1d8f62a | 41 | |
4a19138c SS |
42 | if (phys_to_mach.rb_node != NULL) { |
43 | mfn = __pfn_to_mfn(pfn); | |
44 | if (mfn != INVALID_P2M_ENTRY) | |
45 | return mfn; | |
46 | } | |
47 | ||
18c51e1a | 48 | return pfn; |
4a19138c SS |
49 | } |
50 | ||
51 | static inline unsigned long mfn_to_pfn(unsigned long mfn) | |
52 | { | |
18c51e1a | 53 | return mfn; |
4a19138c SS |
54 | } |
55 | ||
56 | #define mfn_to_local_pfn(mfn) mfn_to_pfn(mfn) | |
57 | ||
36a67abc SS |
58 | static inline xmaddr_t phys_to_machine(xpaddr_t phys) |
59 | { | |
60 | unsigned offset = phys.paddr & ~PAGE_MASK; | |
61 | return XMADDR(PFN_PHYS(pfn_to_mfn(PFN_DOWN(phys.paddr))) | offset); | |
62 | } | |
63 | ||
64 | static inline xpaddr_t machine_to_phys(xmaddr_t machine) | |
65 | { | |
66 | unsigned offset = machine.maddr & ~PAGE_MASK; | |
67 | return XPADDR(PFN_PHYS(mfn_to_pfn(PFN_DOWN(machine.maddr))) | offset); | |
68 | } | |
69 | /* VIRT <-> MACHINE conversion */ | |
70 | #define virt_to_machine(v) (phys_to_machine(XPADDR(__pa(v)))) | |
36a67abc SS |
71 | #define virt_to_mfn(v) (pfn_to_mfn(virt_to_pfn(v))) |
72 | #define mfn_to_virt(m) (__va(mfn_to_pfn(m) << PAGE_SHIFT)) | |
73 | ||
74 | static inline xmaddr_t arbitrary_virt_to_machine(void *vaddr) | |
75 | { | |
76 | /* TODO: assuming it is mapped in the kernel 1:1 */ | |
77 | return virt_to_machine(vaddr); | |
78 | } | |
79 | ||
80 | /* TODO: this shouldn't be here but it is because the frontend drivers | |
81 | * are using it (its rolled in headers) even though we won't hit the code path. | |
82 | * So for right now just punt with this. | |
83 | */ | |
84 | static inline pte_t *lookup_address(unsigned long address, unsigned int *level) | |
85 | { | |
86 | BUG(); | |
87 | return NULL; | |
88 | } | |
89 | ||
1429d46d ZK |
90 | extern int set_foreign_p2m_mapping(struct gnttab_map_grant_ref *map_ops, |
91 | struct gnttab_map_grant_ref *kmap_ops, | |
92 | struct page **pages, unsigned int count); | |
36a67abc | 93 | |
1429d46d | 94 | extern int clear_foreign_p2m_mapping(struct gnttab_unmap_grant_ref *unmap_ops, |
853d0289 | 95 | struct gnttab_unmap_grant_ref *kunmap_ops, |
1429d46d | 96 | struct page **pages, unsigned int count); |
36a67abc | 97 | |
4a19138c SS |
98 | bool __set_phys_to_machine(unsigned long pfn, unsigned long mfn); |
99 | bool __set_phys_to_machine_multi(unsigned long pfn, unsigned long mfn, | |
100 | unsigned long nr_pages); | |
ee7b5958 | 101 | |
36a67abc SS |
102 | static inline bool set_phys_to_machine(unsigned long pfn, unsigned long mfn) |
103 | { | |
ee7b5958 | 104 | return __set_phys_to_machine(pfn, mfn); |
36a67abc | 105 | } |
3216dceb | 106 | |
84621c9b | 107 | #define xen_remap(cookie, size) ioremap_cache((cookie), (size)) |
efaf30a3 | 108 | #define xen_unmap(cookie) iounmap((cookie)) |
3216dceb | 109 | |
a4dba130 SS |
110 | bool xen_arch_need_swiotlb(struct device *dev, |
111 | unsigned long pfn, | |
112 | unsigned long mfn); | |
113 | ||
36a67abc | 114 | #endif /* _ASM_ARM_XEN_PAGE_H */ |