1 #ifndef _ASM_X86_PAGE_H
2 #define _ASM_X86_PAGE_H
4 #include <linux/const.h>
6 /* PAGE_SHIFT determines the page size */
8 #define PAGE_SIZE (_AC(1,UL) << PAGE_SHIFT)
9 #define PAGE_MASK (~(PAGE_SIZE-1))
13 #define PHYSICAL_PAGE_MASK (PAGE_MASK & __PHYSICAL_MASK)
14 #define PTE_MASK (_AT(long, PHYSICAL_PAGE_MASK))
16 #define PMD_PAGE_SIZE (_AC(1, UL) << PMD_SHIFT)
17 #define PMD_PAGE_MASK (~(PMD_PAGE_SIZE-1))
19 #define HPAGE_SHIFT PMD_SHIFT
20 #define HPAGE_SIZE (_AC(1,UL) << HPAGE_SHIFT)
21 #define HPAGE_MASK (~(HPAGE_SIZE - 1))
22 #define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT)
24 /* to align the pointer to the (next) page boundary */
25 #define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK)
27 #define __PHYSICAL_MASK _AT(phys_addr_t, (_AC(1,ULL) << __PHYSICAL_MASK_SHIFT) - 1)
28 #define __VIRTUAL_MASK ((_AC(1,UL) << __VIRTUAL_MASK_SHIFT) - 1)
31 #include <linux/types.h>
35 #include <asm/page_64.h>
36 #define max_pfn_mapped end_pfn_map
38 #include <asm/page_32.h>
39 #define max_pfn_mapped max_low_pfn
40 #endif /* CONFIG_X86_64 */
42 #define PAGE_OFFSET ((unsigned long)__PAGE_OFFSET)
44 #define VM_DATA_DEFAULT_FLAGS \
45 (((current->personality & READ_IMPLIES_EXEC) ? VM_EXEC : 0 ) | \
46 VM_READ | VM_WRITE | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
51 extern int page_is_ram(unsigned long pagenr);
55 static void inline clear_user_page(void *page, unsigned long vaddr,
61 static void inline copy_user_page(void *to, void *from, unsigned long vaddr,
67 #define __alloc_zeroed_user_highpage(movableflags, vma, vaddr) \
68 alloc_page_vma(GFP_HIGHUSER | __GFP_ZERO | movableflags, vma, vaddr)
69 #define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE
71 typedef struct { pgdval_t pgd; } pgd_t;
72 typedef struct { pgprotval_t pgprot; } pgprot_t;
74 static inline pgd_t native_make_pgd(pgdval_t val)
76 return (pgd_t) { val };
79 static inline pgdval_t native_pgd_val(pgd_t pgd)
84 #if PAGETABLE_LEVELS >= 3
85 #if PAGETABLE_LEVELS == 4
86 typedef struct { pudval_t pud; } pud_t;
88 static inline pud_t native_make_pud(pmdval_t val)
90 return (pud_t) { val };
93 static inline pudval_t native_pud_val(pud_t pud)
97 #else /* PAGETABLE_LEVELS == 3 */
98 #include <asm-generic/pgtable-nopud.h>
100 static inline pudval_t native_pud_val(pud_t pud)
102 return native_pgd_val(pud.pgd);
104 #endif /* PAGETABLE_LEVELS == 4 */
106 typedef struct { pmdval_t pmd; } pmd_t;
108 static inline pmd_t native_make_pmd(pmdval_t val)
110 return (pmd_t) { val };
113 static inline pmdval_t native_pmd_val(pmd_t pmd)
117 #else /* PAGETABLE_LEVELS == 2 */
118 #include <asm-generic/pgtable-nopmd.h>
120 static inline pmdval_t native_pmd_val(pmd_t pmd)
122 return native_pgd_val(pmd.pud.pgd);
124 #endif /* PAGETABLE_LEVELS >= 3 */
126 static inline pte_t native_make_pte(pteval_t val)
128 return (pte_t) { .pte = val };
131 static inline pteval_t native_pte_val(pte_t pte)
136 #define pgprot_val(x) ((x).pgprot)
137 #define __pgprot(x) ((pgprot_t) { (x) } )
139 #ifdef CONFIG_PARAVIRT
140 #include <asm/paravirt.h>
141 #else /* !CONFIG_PARAVIRT */
143 #define pgd_val(x) native_pgd_val(x)
144 #define __pgd(x) native_make_pgd(x)
146 #ifndef __PAGETABLE_PUD_FOLDED
147 #define pud_val(x) native_pud_val(x)
148 #define __pud(x) native_make_pud(x)
151 #ifndef __PAGETABLE_PMD_FOLDED
152 #define pmd_val(x) native_pmd_val(x)
153 #define __pmd(x) native_make_pmd(x)
156 #define pte_val(x) native_pte_val(x)
157 #define __pte(x) native_make_pte(x)
159 #endif /* CONFIG_PARAVIRT */
161 #define __pa(x) __phys_addr((unsigned long)(x))
162 /* __pa_symbol should be used for C visible symbols.
163 This seems to be the official gcc blessed way to do such arithmetic. */
164 #define __pa_symbol(x) __pa(__phys_reloc_hide((unsigned long)(x)))
166 #define __va(x) ((void *)((unsigned long)(x)+PAGE_OFFSET))
168 #define __boot_va(x) __va(x)
169 #define __boot_pa(x) __pa(x)
171 #define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
172 #define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT)
173 #define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
175 #endif /* __ASSEMBLY__ */
177 #include <asm-generic/memory_model.h>
178 #include <asm-generic/page.h>
180 #define __HAVE_ARCH_GATE_AREA 1
182 #endif /* __KERNEL__ */
183 #endif /* _ASM_X86_PAGE_H */