4 #include <linux/config.h>
7 /* PAGE_SHIFT determines the page size */
9 #define PAGE_SIZE (1UL << PAGE_SHIFT)
10 #define PAGE_MASK (~(PAGE_SIZE-1))
16 #define STRICT_MM_TYPECHECKS
18 extern void clear_page(void *page);
19 #define clear_user_page(page, vaddr, pg) clear_page(page)
21 #define alloc_zeroed_user_highpage(vma, vaddr) alloc_page_vma(GFP_HIGHUSER | __GFP_ZERO, vma, vmaddr)
22 #define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE
24 extern void copy_page(void * _to, void * _from);
25 #define copy_user_page(to, from, vaddr, pg) copy_page(to, from)
27 #ifdef STRICT_MM_TYPECHECKS
29 * These are used to make use of C type-checking..
31 typedef struct { unsigned long pte; } pte_t;
32 typedef struct { unsigned long pmd; } pmd_t;
33 typedef struct { unsigned long pgd; } pgd_t;
34 typedef struct { unsigned long pgprot; } pgprot_t;
36 #define pte_val(x) ((x).pte)
37 #define pmd_val(x) ((x).pmd)
38 #define pgd_val(x) ((x).pgd)
39 #define pgprot_val(x) ((x).pgprot)
41 #define __pte(x) ((pte_t) { (x) } )
42 #define __pmd(x) ((pmd_t) { (x) } )
43 #define __pgd(x) ((pgd_t) { (x) } )
44 #define __pgprot(x) ((pgprot_t) { (x) } )
48 * .. while these make it easier on the compiler
50 typedef unsigned long pte_t;
51 typedef unsigned long pmd_t;
52 typedef unsigned long pgd_t;
53 typedef unsigned long pgprot_t;
55 #define pte_val(x) (x)
56 #define pmd_val(x) (x)
57 #define pgd_val(x) (x)
58 #define pgprot_val(x) (x)
62 #define __pgprot(x) (x)
64 #endif /* STRICT_MM_TYPECHECKS */
66 /* Pure 2^n version of get_order */
67 extern __inline__ int get_order(unsigned long size)
71 size = (size-1) >> (PAGE_SHIFT-1);
80 #ifdef USE_48_BIT_KSEG
81 #define PAGE_OFFSET 0xffff800000000000UL
83 #define PAGE_OFFSET 0xfffffc0000000000UL
88 #ifdef USE_48_BIT_KSEG
89 #define PAGE_OFFSET 0xffff800000000000
91 #define PAGE_OFFSET 0xfffffc0000000000
94 #endif /* !__ASSEMBLY__ */
96 /* to align the pointer to the (next) page boundary */
97 #define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK)
99 #define __pa(x) ((unsigned long) (x) - PAGE_OFFSET)
100 #define __va(x) ((void *)((unsigned long) (x) + PAGE_OFFSET))
101 #ifndef CONFIG_DISCONTIGMEM
102 #define pfn_to_page(pfn) (mem_map + (pfn))
103 #define page_to_pfn(page) ((unsigned long)((page) - mem_map))
104 #define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
106 #define pfn_valid(pfn) ((pfn) < max_mapnr)
107 #define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
108 #endif /* CONFIG_DISCONTIGMEM */
110 #define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \
111 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
113 #endif /* __KERNEL__ */
115 #endif /* _ALPHA_PAGE_H */