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>
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)
49 extern int page_is_ram(unsigned long pagenr);
50 extern int devmem_is_allowed(unsigned long pagenr);
52 extern unsigned long max_pfn_mapped;
56 static inline void clear_user_page(void *page, unsigned long vaddr,
62 static inline void copy_user_page(void *to, void *from, unsigned long vaddr,
68 #define __alloc_zeroed_user_highpage(movableflags, vma, vaddr) \
69 alloc_page_vma(GFP_HIGHUSER | __GFP_ZERO | movableflags, vma, vaddr)
70 #define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE
72 typedef struct { pgdval_t pgd; } pgd_t;
73 typedef struct { pgprotval_t pgprot; } pgprot_t;
75 static inline pgd_t native_make_pgd(pgdval_t val)
77 return (pgd_t) { val };
80 static inline pgdval_t native_pgd_val(pgd_t pgd)
85 #if PAGETABLE_LEVELS >= 3
86 #if PAGETABLE_LEVELS == 4
87 typedef struct { pudval_t pud; } pud_t;
89 static inline pud_t native_make_pud(pmdval_t val)
91 return (pud_t) { val };
94 static inline pudval_t native_pud_val(pud_t pud)
98 #else /* PAGETABLE_LEVELS == 3 */
99 #include <asm-generic/pgtable-nopud.h>
101 static inline pudval_t native_pud_val(pud_t pud)
103 return native_pgd_val(pud.pgd);
105 #endif /* PAGETABLE_LEVELS == 4 */
107 typedef struct { pmdval_t pmd; } pmd_t;
109 static inline pmd_t native_make_pmd(pmdval_t val)
111 return (pmd_t) { val };
114 static inline pmdval_t native_pmd_val(pmd_t pmd)
118 #else /* PAGETABLE_LEVELS == 2 */
119 #include <asm-generic/pgtable-nopmd.h>
121 static inline pmdval_t native_pmd_val(pmd_t pmd)
123 return native_pgd_val(pmd.pud.pgd);
125 #endif /* PAGETABLE_LEVELS >= 3 */
127 static inline pte_t native_make_pte(pteval_t val)
129 return (pte_t) { .pte = val };
132 static inline pteval_t native_pte_val(pte_t pte)
137 #define pgprot_val(x) ((x).pgprot)
138 #define __pgprot(x) ((pgprot_t) { (x) } )
140 #ifdef CONFIG_PARAVIRT
141 #include <asm/paravirt.h>
142 #else /* !CONFIG_PARAVIRT */
144 #define pgd_val(x) native_pgd_val(x)
145 #define __pgd(x) native_make_pgd(x)
147 #ifndef __PAGETABLE_PUD_FOLDED
148 #define pud_val(x) native_pud_val(x)
149 #define __pud(x) native_make_pud(x)
152 #ifndef __PAGETABLE_PMD_FOLDED
153 #define pmd_val(x) native_pmd_val(x)
154 #define __pmd(x) native_make_pmd(x)
157 #define pte_val(x) native_pte_val(x)
158 #define __pte(x) native_make_pte(x)
160 #endif /* CONFIG_PARAVIRT */
162 #define __pa(x) __phys_addr((unsigned long)(x))
163 /* __pa_symbol should be used for C visible symbols.
164 This seems to be the official gcc blessed way to do such arithmetic. */
165 #define __pa_symbol(x) __pa(__phys_reloc_hide((unsigned long)(x)))
167 #define __va(x) ((void *)((unsigned long)(x)+PAGE_OFFSET))
169 #define __boot_va(x) __va(x)
170 #define __boot_pa(x) __pa(x)
172 #define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
173 #define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT)
174 #define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
176 #endif /* __ASSEMBLY__ */
178 #include <asm-generic/memory_model.h>
179 #include <asm-generic/page.h>
181 #define __HAVE_ARCH_GATE_AREA 1
183 #endif /* __KERNEL__ */
184 #endif /* _ASM_X86_PAGE_H */