1 #ifndef _ASM_X86_PAGE_H 2 #define _ASM_X86_PAGE_H 3 4 #include <linux/const.h> 5 6 /* PAGE_SHIFT determines the page size */ 7 #define PAGE_SHIFT 12 8 #define PAGE_SIZE (_AC(1,UL) << PAGE_SHIFT) 9 #define PAGE_MASK (~(PAGE_SIZE-1)) 10 11 #ifdef __KERNEL__ 12 13 #define __PHYSICAL_MASK ((phys_addr_t)(1ULL << __PHYSICAL_MASK_SHIFT) - 1) 14 #define __VIRTUAL_MASK ((1UL << __VIRTUAL_MASK_SHIFT) - 1) 15 16 /* Cast PAGE_MASK to a signed type so that it is sign-extended if 17 virtual addresses are 32-bits but physical addresses are larger 18 (ie, 32-bit PAE). */ 19 #define PHYSICAL_PAGE_MASK (((signed long)PAGE_MASK) & __PHYSICAL_MASK) 20 21 /* PTE_PFN_MASK extracts the PFN from a (pte|pmd|pud|pgd)val_t */ 22 #define PTE_PFN_MASK ((pteval_t)PHYSICAL_PAGE_MASK) 23 24 /* PTE_FLAGS_MASK extracts the flags from a (pte|pmd|pud|pgd)val_t */ 25 #define PTE_FLAGS_MASK (~PTE_PFN_MASK) 26 27 #define PMD_PAGE_SIZE (_AC(1, UL) << PMD_SHIFT) 28 #define PMD_PAGE_MASK (~(PMD_PAGE_SIZE-1)) 29 30 #define HPAGE_SHIFT PMD_SHIFT 31 #define HPAGE_SIZE (_AC(1,UL) << HPAGE_SHIFT) 32 #define HPAGE_MASK (~(HPAGE_SIZE - 1)) 33 #define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT) 34 35 #define HUGE_MAX_HSTATE 2 36 37 #ifndef __ASSEMBLY__ 38 #include <linux/types.h> 39 #endif 40 41 #ifdef CONFIG_X86_64 42 #include <asm/page_64.h> 43 #else 44 #include <asm/page_32.h> 45 #endif /* CONFIG_X86_64 */ 46 47 #define PAGE_OFFSET ((unsigned long)__PAGE_OFFSET) 48 49 #define VM_DATA_DEFAULT_FLAGS \ 50 (((current->personality & READ_IMPLIES_EXEC) ? VM_EXEC : 0 ) | \ 51 VM_READ | VM_WRITE | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) 52 53 54 #ifndef __ASSEMBLY__ 55 56 typedef struct { pgdval_t pgd; } pgd_t; 57 typedef struct { pgprotval_t pgprot; } pgprot_t; 58 59 extern int page_is_ram(unsigned long pagenr); 60 extern int pagerange_is_ram(unsigned long start, unsigned long end); 61 extern int devmem_is_allowed(unsigned long pagenr); 62 extern void map_devmem(unsigned long pfn, unsigned long size, 63 pgprot_t vma_prot); 64 extern void unmap_devmem(unsigned long pfn, unsigned long size, 65 pgprot_t vma_prot); 66 67 extern unsigned long max_low_pfn_mapped; 68 extern unsigned long max_pfn_mapped; 69 70 struct page; 71 72 static inline void clear_user_page(void *page, unsigned long vaddr, 73 struct page *pg) 74 { 75 clear_page(page); 76 } 77 78 static inline void copy_user_page(void *to, void *from, unsigned long vaddr, 79 struct page *topage) 80 { 81 copy_page(to, from); 82 } 83 84 #define __alloc_zeroed_user_highpage(movableflags, vma, vaddr) \ 85 alloc_page_vma(GFP_HIGHUSER | __GFP_ZERO | movableflags, vma, vaddr) 86 #define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE 87 88 static inline pgd_t native_make_pgd(pgdval_t val) 89 { 90 return (pgd_t) { val }; 91 } 92 93 static inline pgdval_t native_pgd_val(pgd_t pgd) 94 { 95 return pgd.pgd; 96 } 97 98 #if PAGETABLE_LEVELS >= 3 99 #if PAGETABLE_LEVELS == 4 100 typedef struct { pudval_t pud; } pud_t; 101 102 static inline pud_t native_make_pud(pmdval_t val) 103 { 104 return (pud_t) { val }; 105 } 106 107 static inline pudval_t native_pud_val(pud_t pud) 108 { 109 return pud.pud; 110 } 111 #else /* PAGETABLE_LEVELS == 3 */ 112 #include <asm-generic/pgtable-nopud.h> 113 114 static inline pudval_t native_pud_val(pud_t pud) 115 { 116 return native_pgd_val(pud.pgd); 117 } 118 #endif /* PAGETABLE_LEVELS == 4 */ 119 120 typedef struct { pmdval_t pmd; } pmd_t; 121 122 static inline pmd_t native_make_pmd(pmdval_t val) 123 { 124 return (pmd_t) { val }; 125 } 126 127 static inline pmdval_t native_pmd_val(pmd_t pmd) 128 { 129 return pmd.pmd; 130 } 131 #else /* PAGETABLE_LEVELS == 2 */ 132 #include <asm-generic/pgtable-nopmd.h> 133 134 static inline pmdval_t native_pmd_val(pmd_t pmd) 135 { 136 return native_pgd_val(pmd.pud.pgd); 137 } 138 #endif /* PAGETABLE_LEVELS >= 3 */ 139 140 static inline pte_t native_make_pte(pteval_t val) 141 { 142 return (pte_t) { .pte = val }; 143 } 144 145 static inline pteval_t native_pte_val(pte_t pte) 146 { 147 return pte.pte; 148 } 149 150 static inline pteval_t native_pte_flags(pte_t pte) 151 { 152 return native_pte_val(pte) & PTE_FLAGS_MASK; 153 } 154 155 #define pgprot_val(x) ((x).pgprot) 156 #define __pgprot(x) ((pgprot_t) { (x) } ) 157 158 #ifdef CONFIG_PARAVIRT 159 #include <asm/paravirt.h> 160 #else /* !CONFIG_PARAVIRT */ 161 162 #define pgd_val(x) native_pgd_val(x) 163 #define __pgd(x) native_make_pgd(x) 164 165 #ifndef __PAGETABLE_PUD_FOLDED 166 #define pud_val(x) native_pud_val(x) 167 #define __pud(x) native_make_pud(x) 168 #endif 169 170 #ifndef __PAGETABLE_PMD_FOLDED 171 #define pmd_val(x) native_pmd_val(x) 172 #define __pmd(x) native_make_pmd(x) 173 #endif 174 175 #define pte_val(x) native_pte_val(x) 176 #define pte_flags(x) native_pte_flags(x) 177 #define __pte(x) native_make_pte(x) 178 179 #endif /* CONFIG_PARAVIRT */ 180 181 #define __pa(x) __phys_addr((unsigned long)(x)) 182 #define __pa_nodebug(x) __phys_addr_nodebug((unsigned long)(x)) 183 /* __pa_symbol should be used for C visible symbols. 184 This seems to be the official gcc blessed way to do such arithmetic. */ 185 #define __pa_symbol(x) __pa(__phys_reloc_hide((unsigned long)(x))) 186 187 #define __va(x) ((void *)((unsigned long)(x)+PAGE_OFFSET)) 188 189 #define __boot_va(x) __va(x) 190 #define __boot_pa(x) __pa(x) 191 192 /* 193 * virt_to_page(kaddr) returns a valid pointer if and only if 194 * virt_addr_valid(kaddr) returns true. 195 */ 196 #define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT) 197 #define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT) 198 extern bool __virt_addr_valid(unsigned long kaddr); 199 #define virt_addr_valid(kaddr) __virt_addr_valid((unsigned long) (kaddr)) 200 201 #endif /* __ASSEMBLY__ */ 202 203 #include <asm-generic/memory_model.h> 204 #include <asm-generic/page.h> 205 206 #define __HAVE_ARCH_GATE_AREA 1 207 208 #endif /* __KERNEL__ */ 209 #endif /* _ASM_X86_PAGE_H */ 210