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 end_pfn_map
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
);
53 extern unsigned long end_pfn_map
;
57 static inline void clear_user_page(void *page
, unsigned long vaddr
,
63 static inline void copy_user_page(void *to
, void *from
, unsigned long vaddr
,
69 #define __alloc_zeroed_user_highpage(movableflags, vma, vaddr) \
70 alloc_page_vma(GFP_HIGHUSER | __GFP_ZERO | movableflags, vma, vaddr)
71 #define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE
73 typedef struct { pgdval_t pgd
; } pgd_t
;
74 typedef struct { pgprotval_t pgprot
; } pgprot_t
;
76 static inline pgd_t
native_make_pgd(pgdval_t val
)
78 return (pgd_t
) { val
};
81 static inline pgdval_t
native_pgd_val(pgd_t pgd
)
86 #if PAGETABLE_LEVELS >= 3
87 #if PAGETABLE_LEVELS == 4
88 typedef struct { pudval_t pud
; } pud_t
;
90 static inline pud_t
native_make_pud(pmdval_t val
)
92 return (pud_t
) { val
};
95 static inline pudval_t
native_pud_val(pud_t pud
)
99 #else /* PAGETABLE_LEVELS == 3 */
100 #include <asm-generic/pgtable-nopud.h>
102 static inline pudval_t
native_pud_val(pud_t pud
)
104 return native_pgd_val(pud
.pgd
);
106 #endif /* PAGETABLE_LEVELS == 4 */
108 typedef struct { pmdval_t pmd
; } pmd_t
;
110 static inline pmd_t
native_make_pmd(pmdval_t val
)
112 return (pmd_t
) { val
};
115 static inline pmdval_t
native_pmd_val(pmd_t pmd
)
119 #else /* PAGETABLE_LEVELS == 2 */
120 #include <asm-generic/pgtable-nopmd.h>
122 static inline pmdval_t
native_pmd_val(pmd_t pmd
)
124 return native_pgd_val(pmd
.pud
.pgd
);
126 #endif /* PAGETABLE_LEVELS >= 3 */
128 static inline pte_t
native_make_pte(pteval_t val
)
130 return (pte_t
) { .pte
= val
};
133 static inline pteval_t
native_pte_val(pte_t pte
)
138 #define pgprot_val(x) ((x).pgprot)
139 #define __pgprot(x) ((pgprot_t) { (x) } )
141 #ifdef CONFIG_PARAVIRT
142 #include <asm/paravirt.h>
143 #else /* !CONFIG_PARAVIRT */
145 #define pgd_val(x) native_pgd_val(x)
146 #define __pgd(x) native_make_pgd(x)
148 #ifndef __PAGETABLE_PUD_FOLDED
149 #define pud_val(x) native_pud_val(x)
150 #define __pud(x) native_make_pud(x)
153 #ifndef __PAGETABLE_PMD_FOLDED
154 #define pmd_val(x) native_pmd_val(x)
155 #define __pmd(x) native_make_pmd(x)
158 #define pte_val(x) native_pte_val(x)
159 #define __pte(x) native_make_pte(x)
161 #endif /* CONFIG_PARAVIRT */
163 #define __pa(x) __phys_addr((unsigned long)(x))
164 /* __pa_symbol should be used for C visible symbols.
165 This seems to be the official gcc blessed way to do such arithmetic. */
166 #define __pa_symbol(x) __pa(__phys_reloc_hide((unsigned long)(x)))
168 #define __va(x) ((void *)((unsigned long)(x)+PAGE_OFFSET))
170 #define __boot_va(x) __va(x)
171 #define __boot_pa(x) __pa(x)
173 #define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
174 #define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT)
175 #define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
177 #endif /* __ASSEMBLY__ */
179 #include <asm-generic/memory_model.h>
180 #include <asm-generic/page.h>
182 #define __HAVE_ARCH_GATE_AREA 1
184 #endif /* __KERNEL__ */
185 #endif /* _ASM_X86_PAGE_H */