8 * These are used to make use of C type-checking..
10 extern int nx_enabled;
13 typedef struct { unsigned long pte_low, pte_high; } pte_t;
14 typedef struct { unsigned long long pmd; } pmd_t;
15 typedef struct { unsigned long long pgd; } pgd_t;
16 typedef struct { unsigned long long pgprot; } pgprot_t;
18 static inline unsigned long long native_pgd_val(pgd_t pgd)
23 static inline unsigned long long native_pmd_val(pmd_t pmd)
28 static inline unsigned long long native_pte_val(pte_t pte)
30 return pte.pte_low | ((unsigned long long)pte.pte_high << 32);
33 static inline pgd_t native_make_pgd(unsigned long long val)
35 return (pgd_t) { val };
38 static inline pmd_t native_make_pmd(unsigned long long val)
40 return (pmd_t) { val };
43 static inline pte_t native_make_pte(unsigned long long val)
45 return (pte_t) { .pte_low = val, .pte_high = (val >> 32) } ;
48 #ifndef CONFIG_PARAVIRT
49 #define pmd_val(x) native_pmd_val(x)
50 #define __pmd(x) native_make_pmd(x)
53 #include <asm-generic/pgtable-nopud.h>
54 #else /* !CONFIG_X86_PAE */
55 typedef struct { unsigned long pte_low; } pte_t;
56 typedef struct { unsigned long pgd; } pgd_t;
57 typedef struct { unsigned long pgprot; } pgprot_t;
58 #define boot_pte_t pte_t /* or would you rather have a typedef */
60 static inline unsigned long native_pgd_val(pgd_t pgd)
65 static inline unsigned long native_pte_val(pte_t pte)
70 static inline pgd_t native_make_pgd(unsigned long val)
72 return (pgd_t) { val };
75 static inline pte_t native_make_pte(unsigned long val)
77 return (pte_t) { .pte_low = val };
80 #include <asm-generic/pgtable-nopmd.h>
81 #endif /* CONFIG_X86_PAE */
83 #define PTE_MASK PAGE_MASK
85 #define pgprot_val(x) ((x).pgprot)
86 #define __pgprot(x) ((pgprot_t) { (x) } )
88 #ifndef CONFIG_PARAVIRT
89 #define pgd_val(x) native_pgd_val(x)
90 #define __pgd(x) native_make_pgd(x)
91 #define pte_val(x) native_pte_val(x)
92 #define __pte(x) native_make_pte(x)
95 #endif /* !__ASSEMBLY__ */
99 struct vm_area_struct;
102 * This much address space is reserved for vmalloc() and iomap()
103 * as well as fixmap mappings.
105 extern unsigned int __VMALLOC_RESERVE;
107 extern int sysctl_legacy_va_layout;
109 extern int page_is_ram(unsigned long pagenr);
111 #endif /* __ASSEMBLY__ */
113 #define VMALLOC_RESERVE ((unsigned long)__VMALLOC_RESERVE)
114 #define MAXMEM (-__PAGE_OFFSET-__VMALLOC_RESERVE)
115 #define __pa(x) ((unsigned long)(x)-PAGE_OFFSET)
116 /* __pa_symbol should be used for C visible symbols.
117 This seems to be the official gcc blessed way to do such arithmetic. */
118 #define __pa_symbol(x) __pa(RELOC_HIDE((unsigned long)(x),0))
119 #define __va(x) ((void *)((unsigned long)(x)+PAGE_OFFSET))
120 #define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT)
121 #ifdef CONFIG_FLATMEM
122 #define pfn_valid(pfn) ((pfn) < max_mapnr)
123 #endif /* CONFIG_FLATMEM */
124 #define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
126 #define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
128 #include <asm-generic/memory_model.h>
129 #include <asm-generic/page.h>
131 #define __HAVE_ARCH_GATE_AREA 1
132 #endif /* __KERNEL__ */
134 #endif /* _I386_PAGE_H */