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1 #ifndef _ASM_PAGE_H
2 #define _ASM_PAGE_H
3
4 #include <asm/virtconvert.h>
5 #include <asm/mem-layout.h>
6 #include <asm/sections.h>
7 #include <asm/setup.h>
8
9 #ifndef __ASSEMBLY__
10
11 #define clear_page(pgaddr) memset((pgaddr), 0, PAGE_SIZE)
12 #define copy_page(to,from) memcpy((to), (from), PAGE_SIZE)
13
14 #define clear_user_page(pgaddr, vaddr, page) memset((pgaddr), 0, PAGE_SIZE)
15 #define copy_user_page(vto, vfrom, vaddr, topg) memcpy((vto), (vfrom), PAGE_SIZE)
16
17 /*
18 * These are used to make use of C type-checking..
19 */
20 typedef struct { unsigned long pte; } pte_t;
21 typedef struct { unsigned long ste[64];} pmd_t;
22 typedef struct { pmd_t pue[1]; } pud_t;
23 typedef struct { pud_t pge[1]; } pgd_t;
24 typedef struct { unsigned long pgprot; } pgprot_t;
25 typedef struct page *pgtable_t;
26
27 #define pte_val(x) ((x).pte)
28 #define pmd_val(x) ((x).ste[0])
29 #define pud_val(x) ((x).pue[0])
30 #define pgd_val(x) ((x).pge[0])
31 #define pgprot_val(x) ((x).pgprot)
32
33 #define __pte(x) ((pte_t) { (x) } )
34 #define __pmd(x) ((pmd_t) { { (x) } } )
35 #define __pud(x) ((pud_t) { (x) } )
36 #define __pgd(x) ((pgd_t) { (x) } )
37 #define __pgprot(x) ((pgprot_t) { (x) } )
38 #define PTE_MASK PAGE_MASK
39
40 #define devmem_is_allowed(pfn) 1
41
42 #define __pa(vaddr) virt_to_phys((void *) (unsigned long) (vaddr))
43 #define __va(paddr) phys_to_virt((unsigned long) (paddr))
44
45 #define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT)
46
47 extern unsigned long max_low_pfn;
48 extern unsigned long min_low_pfn;
49 extern unsigned long max_pfn;
50
51 #ifdef CONFIG_MMU
52 #define pfn_valid(pfn) ((pfn) < max_mapnr)
53 #else
54 #define ARCH_PFN_OFFSET (PAGE_OFFSET >> PAGE_SHIFT)
55 #define pfn_valid(pfn) ((pfn) >= min_low_pfn && (pfn) < max_low_pfn)
56
57 #endif
58
59 #define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
60 #define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
61
62
63 #define VM_DATA_DEFAULT_FLAGS \
64 (VM_READ | VM_WRITE | \
65 ((current->personality & READ_IMPLIES_EXEC) ? VM_EXEC : 0 ) | \
66 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
67
68 #endif /* __ASSEMBLY__ */
69
70 #include <asm-generic/memory_model.h>
71 #include <asm-generic/getorder.h>
72
73 #endif /* _ASM_PAGE_H */