6 #include <linux/const.h>
9 /* PAGE_SHIFT determines the page size */
11 #define PAGE_SIZE (_AC(1,UL) << PAGE_SHIFT)
12 #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(movableflags, vma, vaddr) \
22 alloc_page_vma(GFP_HIGHUSER | __GFP_ZERO | movableflags, vma, vmaddr)
23 #define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE
25 extern void copy_page(void * _to, void * _from);
26 #define copy_user_page(to, from, vaddr, pg) copy_page(to, from)
28 #ifdef STRICT_MM_TYPECHECKS
30 * These are used to make use of C type-checking..
32 typedef struct { unsigned long pte; } pte_t;
33 typedef struct { unsigned long pmd; } pmd_t;
34 typedef struct { unsigned long pgd; } pgd_t;
35 typedef struct { unsigned long pgprot; } pgprot_t;
37 #define pte_val(x) ((x).pte)
38 #define pmd_val(x) ((x).pmd)
39 #define pgd_val(x) ((x).pgd)
40 #define pgprot_val(x) ((x).pgprot)
42 #define __pte(x) ((pte_t) { (x) } )
43 #define __pmd(x) ((pmd_t) { (x) } )
44 #define __pgd(x) ((pgd_t) { (x) } )
45 #define __pgprot(x) ((pgprot_t) { (x) } )
49 * .. while these make it easier on the compiler
51 typedef unsigned long pte_t;
52 typedef unsigned long pmd_t;
53 typedef unsigned long pgd_t;
54 typedef unsigned long pgprot_t;
56 #define pte_val(x) (x)
57 #define pmd_val(x) (x)
58 #define pgd_val(x) (x)
59 #define pgprot_val(x) (x)
63 #define __pgprot(x) (x)
65 #endif /* STRICT_MM_TYPECHECKS */
67 #ifdef USE_48_BIT_KSEG
68 #define PAGE_OFFSET 0xffff800000000000UL
70 #define PAGE_OFFSET 0xfffffc0000000000UL
75 #ifdef USE_48_BIT_KSEG
76 #define PAGE_OFFSET 0xffff800000000000
78 #define PAGE_OFFSET 0xfffffc0000000000
81 #endif /* !__ASSEMBLY__ */
83 /* to align the pointer to the (next) page boundary */
84 #define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK)
86 #define __pa(x) ((unsigned long) (x) - PAGE_OFFSET)
87 #define __va(x) ((void *)((unsigned long) (x) + PAGE_OFFSET))
88 #ifndef CONFIG_DISCONTIGMEM
89 #define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
91 #define pfn_valid(pfn) ((pfn) < max_mapnr)
92 #define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
93 #endif /* CONFIG_DISCONTIGMEM */
95 #define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \
96 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
98 #include <asm-generic/memory_model.h>
99 #include <asm-generic/page.h>
101 #endif /* __KERNEL__ */
102 #endif /* _ALPHA_PAGE_H */