7 #include <linux/string.h>
9 #ifdef CONFIG_X86_USE_3DNOW
13 static inline void clear_page(void *page)
18 static inline void copy_page(void *to, void *from)
20 mmx_copy_page(to, from);
26 * On older X86 processors it's not a win to use MMX here it seems.
30 static inline void clear_page(void *page)
32 memset(page, 0, PAGE_SIZE);
35 static inline void copy_page(void *to, void *from)
37 memcpy(to, from, PAGE_SIZE);
44 static void inline clear_user_page(void *page, unsigned long vaddr,
50 static void inline copy_user_page(void *to, void *from, unsigned long vaddr,
56 #define __alloc_zeroed_user_highpage(movableflags, vma, vaddr) \
57 alloc_page_vma(GFP_HIGHUSER | __GFP_ZERO | movableflags, vma, vaddr)
58 #define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE
61 * These are used to make use of C type-checking..
63 extern int nx_enabled;
66 typedef struct { unsigned long pte_low, pte_high; } pte_t;
67 typedef struct { unsigned long long pmd; } pmd_t;
68 typedef struct { unsigned long long pgd; } pgd_t;
69 typedef struct { unsigned long long pgprot; } pgprot_t;
71 static inline unsigned long long native_pgd_val(pgd_t pgd)
76 static inline unsigned long long native_pmd_val(pmd_t pmd)
81 static inline unsigned long long native_pte_val(pte_t pte)
83 return pte.pte_low | ((unsigned long long)pte.pte_high << 32);
86 static inline pgd_t native_make_pgd(unsigned long long val)
88 return (pgd_t) { val };
91 static inline pmd_t native_make_pmd(unsigned long long val)
93 return (pmd_t) { val };
96 static inline pte_t native_make_pte(unsigned long long val)
98 return (pte_t) { .pte_low = val, .pte_high = (val >> 32) } ;
101 #ifndef CONFIG_PARAVIRT
102 #define pmd_val(x) native_pmd_val(x)
103 #define __pmd(x) native_make_pmd(x)
106 #include <asm-generic/pgtable-nopud.h>
107 #else /* !CONFIG_X86_PAE */
108 typedef struct { unsigned long pte_low; } pte_t;
109 typedef struct { unsigned long pgd; } pgd_t;
110 typedef struct { unsigned long pgprot; } pgprot_t;
111 #define boot_pte_t pte_t /* or would you rather have a typedef */
113 static inline unsigned long native_pgd_val(pgd_t pgd)
118 static inline unsigned long native_pte_val(pte_t pte)
123 static inline pgd_t native_make_pgd(unsigned long val)
125 return (pgd_t) { val };
128 static inline pte_t native_make_pte(unsigned long val)
130 return (pte_t) { .pte_low = val };
133 #include <asm-generic/pgtable-nopmd.h>
134 #endif /* CONFIG_X86_PAE */
136 #define PTE_MASK PAGE_MASK
138 #define pgprot_val(x) ((x).pgprot)
139 #define __pgprot(x) ((pgprot_t) { (x) } )
141 #ifndef CONFIG_PARAVIRT
142 #define pgd_val(x) native_pgd_val(x)
143 #define __pgd(x) native_make_pgd(x)
144 #define pte_val(x) native_pte_val(x)
145 #define __pte(x) native_make_pte(x)
148 #endif /* !__ASSEMBLY__ */
152 struct vm_area_struct;
155 * This much address space is reserved for vmalloc() and iomap()
156 * as well as fixmap mappings.
158 extern unsigned int __VMALLOC_RESERVE;
160 extern int sysctl_legacy_va_layout;
162 extern int page_is_ram(unsigned long pagenr);
164 #endif /* __ASSEMBLY__ */
166 #define VMALLOC_RESERVE ((unsigned long)__VMALLOC_RESERVE)
167 #define MAXMEM (-__PAGE_OFFSET-__VMALLOC_RESERVE)
168 #define __pa(x) ((unsigned long)(x)-PAGE_OFFSET)
169 /* __pa_symbol should be used for C visible symbols.
170 This seems to be the official gcc blessed way to do such arithmetic. */
171 #define __pa_symbol(x) __pa(RELOC_HIDE((unsigned long)(x),0))
172 #define __va(x) ((void *)((unsigned long)(x)+PAGE_OFFSET))
173 #define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT)
174 #ifdef CONFIG_FLATMEM
175 #define pfn_valid(pfn) ((pfn) < max_mapnr)
176 #endif /* CONFIG_FLATMEM */
177 #define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
179 #define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
181 #include <asm-generic/memory_model.h>
182 #include <asm-generic/page.h>
184 #define __HAVE_ARCH_GATE_AREA 1
185 #endif /* __KERNEL__ */
187 #endif /* _I386_PAGE_H */