projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 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> | |
| 9 | ||
| 10 | #include <xen/interface/grant_table.h> | |
| 11 | ||
| 12 | #define pfn_to_mfn(pfn) (pfn) | |
| ee7b5958 | 13 | #define phys_to_machine_mapping_valid(pfn) (1) |
| 36a67abc SS |
14 | #define mfn_to_pfn(mfn) (mfn) |
| 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 | ||
| 36a67abc SS |
35 | static inline xmaddr_t phys_to_machine(xpaddr_t phys) |
| 36 | { | |
| 37 | unsigned offset = phys.paddr & ~PAGE_MASK; | |
| 38 | return XMADDR(PFN_PHYS(pfn_to_mfn(PFN_DOWN(phys.paddr))) | offset); | |
| 39 | } | |
| 40 | ||
| 41 | static inline xpaddr_t machine_to_phys(xmaddr_t machine) | |
| 42 | { | |
| 43 | unsigned offset = machine.maddr & ~PAGE_MASK; | |
| 44 | return XPADDR(PFN_PHYS(mfn_to_pfn(PFN_DOWN(machine.maddr))) | offset); | |
| 45 | } | |
| 46 | /* VIRT <-> MACHINE conversion */ | |
| 47 | #define virt_to_machine(v) (phys_to_machine(XPADDR(__pa(v)))) | |
| 48 | #define virt_to_pfn(v) (PFN_DOWN(__pa(v))) | |
| 49 | #define virt_to_mfn(v) (pfn_to_mfn(virt_to_pfn(v))) | |
| 50 | #define mfn_to_virt(m) (__va(mfn_to_pfn(m) << PAGE_SHIFT)) | |
| 51 | ||
| 52 | static inline xmaddr_t arbitrary_virt_to_machine(void *vaddr) | |
| 53 | { | |
| 54 | /* TODO: assuming it is mapped in the kernel 1:1 */ | |
| 55 | return virt_to_machine(vaddr); | |
| 56 | } | |
| 57 | ||
| 58 | /* TODO: this shouldn't be here but it is because the frontend drivers | |
| 59 | * are using it (its rolled in headers) even though we won't hit the code path. | |
| 60 | * So for right now just punt with this. | |
| 61 | */ | |
| 62 | static inline pte_t *lookup_address(unsigned long address, unsigned int *level) | |
| 63 | { | |
| 64 | BUG(); | |
| 65 | return NULL; | |
| 66 | } | |
| 67 | ||
| 68 | static inline int m2p_add_override(unsigned long mfn, struct page *page, | |
| 69 | struct gnttab_map_grant_ref *kmap_op) | |
| 70 | { | |
| 71 | return 0; | |
| 72 | } | |
| 73 | ||
| 74 | static inline int m2p_remove_override(struct page *page, bool clear_pte) | |
| 75 | { | |
| 76 | return 0; | |
| 77 | } | |
| 78 | ||
| ee7b5958 IC |
79 | static inline bool __set_phys_to_machine(unsigned long pfn, unsigned long mfn) |
| 80 | { | |
| 81 | BUG_ON(pfn != mfn && mfn != INVALID_P2M_ENTRY); | |
| 82 | return true; | |
| 83 | } | |
| 84 | ||
| 36a67abc SS |
85 | static inline bool set_phys_to_machine(unsigned long pfn, unsigned long mfn) |
| 86 | { | |
| ee7b5958 | 87 | return __set_phys_to_machine(pfn, mfn); |
| 36a67abc SS |
88 | } |
| 89 | #endif /* _ASM_ARM_XEN_PAGE_H */ |