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 LARGE_PAGE_SIZE (_AC(1,UL) << PMD_SHIFT)
17 #define LARGE_PAGE_MASK (~(LARGE_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>
37 #include <asm/page_32.h>
38 #endif /* CONFIG_X86_64 */
40 #define PAGE_OFFSET ((unsigned long)__PAGE_OFFSET)
42 #define VM_DATA_DEFAULT_FLAGS \
43 (((current->personality & READ_IMPLIES_EXEC) ? VM_EXEC : 0 ) | \
44 VM_READ | VM_WRITE | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
50 static void inline clear_user_page(void *page, unsigned long vaddr,
56 static void inline copy_user_page(void *to, void *from, unsigned long vaddr,
62 #define __alloc_zeroed_user_highpage(movableflags, vma, vaddr) \
63 alloc_page_vma(GFP_HIGHUSER | __GFP_ZERO | movableflags, vma, vaddr)
64 #define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE
66 typedef struct { pgdval_t pgd; } pgd_t;
67 typedef struct { pgprotval_t pgprot; } pgprot_t;
69 static inline pgd_t native_make_pgd(pgdval_t val)
71 return (pgd_t) { val };
74 static inline pgdval_t native_pgd_val(pgd_t pgd)
79 #if PAGETABLE_LEVELS >= 3
80 #if PAGETABLE_LEVELS == 4
81 typedef struct { pudval_t pud; } pud_t;
83 static inline pud_t native_make_pud(pmdval_t val)
85 return (pud_t) { val };
88 static inline pudval_t native_pud_val(pud_t pud)
92 #else /* PAGETABLE_LEVELS == 3 */
93 #include <asm-generic/pgtable-nopud.h>
94 #endif /* PAGETABLE_LEVELS == 4 */
96 typedef struct { pmdval_t pmd; } pmd_t;
98 static inline pmd_t native_make_pmd(pmdval_t val)
100 return (pmd_t) { val };
103 static inline pmdval_t native_pmd_val(pmd_t pmd)
107 #else /* PAGETABLE_LEVELS == 2 */
108 #include <asm-generic/pgtable-nopmd.h>
109 #endif /* PAGETABLE_LEVELS >= 3 */
111 static inline pte_t native_make_pte(pteval_t val)
113 return (pte_t) { .pte = val };
116 static inline pteval_t native_pte_val(pte_t pte)
121 #define pgprot_val(x) ((x).pgprot)
122 #define __pgprot(x) ((pgprot_t) { (x) } )
124 #ifdef CONFIG_PARAVIRT
125 #include <asm/paravirt.h>
126 #else /* !CONFIG_PARAVIRT */
128 #define pgd_val(x) native_pgd_val(x)
129 #define __pgd(x) native_make_pgd(x)
131 #ifndef __PAGETABLE_PUD_FOLDED
132 #define pud_val(x) native_pud_val(x)
133 #define __pud(x) native_make_pud(x)
136 #ifndef __PAGETABLE_PMD_FOLDED
137 #define pmd_val(x) native_pmd_val(x)
138 #define __pmd(x) native_make_pmd(x)
141 #define pte_val(x) native_pte_val(x)
142 #define __pte(x) native_make_pte(x)
144 #endif /* CONFIG_PARAVIRT */
146 #define __pa(x) __phys_addr((unsigned long)(x))
147 /* __pa_symbol should be used for C visible symbols.
148 This seems to be the official gcc blessed way to do such arithmetic. */
149 #define __pa_symbol(x) __pa(__phys_reloc_hide((unsigned long)(x)))
151 #define __va(x) ((void *)((unsigned long)(x)+PAGE_OFFSET))
153 #define __boot_va(x) __va(x)
154 #define __boot_pa(x) __pa(x)
156 #define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
157 #define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT)
158 #define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
160 #endif /* __ASSEMBLY__ */
162 #include <asm-generic/memory_model.h>
163 #include <asm-generic/page.h>
165 #define __HAVE_ARCH_GATE_AREA 1
167 #endif /* __KERNEL__ */
168 #endif /* _ASM_X86_PAGE_H */