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1da177e4 LT |
1 | #ifndef _ASM_PAGE_H |
2 | #define _ASM_PAGE_H | |
3 | ||
4 | #ifdef __KERNEL__ | |
5 | ||
6 | #include <linux/config.h> | |
7 | #include <asm/virtconvert.h> | |
8 | #include <asm/mem-layout.h> | |
9 | #include <asm/sections.h> | |
10 | #include <asm/setup.h> | |
11 | ||
12 | #ifndef __ASSEMBLY__ | |
13 | ||
14 | #define get_user_page(vaddr) __get_free_page(GFP_KERNEL) | |
15 | #define free_user_page(page, addr) free_page(addr) | |
16 | ||
17 | #define clear_page(pgaddr) memset((pgaddr), 0, PAGE_SIZE) | |
18 | #define copy_page(to,from) memcpy((to), (from), PAGE_SIZE) | |
19 | ||
20 | #define clear_user_page(pgaddr, vaddr, page) memset((pgaddr), 0, PAGE_SIZE) | |
21 | #define copy_user_page(vto, vfrom, vaddr, topg) memcpy((vto), (vfrom), PAGE_SIZE) | |
22 | ||
23 | /* | |
24 | * These are used to make use of C type-checking.. | |
25 | */ | |
26 | typedef struct { unsigned long pte; } pte_t; | |
27 | typedef struct { unsigned long ste[64];} pmd_t; | |
28 | typedef struct { pmd_t pue[1]; } pud_t; | |
29 | typedef struct { pud_t pge[1]; } pgd_t; | |
30 | typedef struct { unsigned long pgprot; } pgprot_t; | |
31 | ||
32 | #define pte_val(x) ((x).pte) | |
33 | #define pmd_val(x) ((x).ste[0]) | |
34 | #define pud_val(x) ((x).pue[0]) | |
35 | #define pgd_val(x) ((x).pge[0]) | |
36 | #define pgprot_val(x) ((x).pgprot) | |
37 | ||
38 | #define __pte(x) ((pte_t) { (x) } ) | |
39 | #define __pmd(x) ((pmd_t) { (x) } ) | |
40 | #define __pud(x) ((pud_t) { (x) } ) | |
41 | #define __pgd(x) ((pgd_t) { (x) } ) | |
42 | #define __pgprot(x) ((pgprot_t) { (x) } ) | |
43 | #define PTE_MASK PAGE_MASK | |
44 | ||
45 | /* to align the pointer to the (next) page boundary */ | |
46 | #define PAGE_ALIGN(addr) (((addr) + PAGE_SIZE - 1) & PAGE_MASK) | |
47 | ||
1da177e4 LT |
48 | #define devmem_is_allowed(pfn) 1 |
49 | ||
8080f231 DH |
50 | #define __pa(vaddr) virt_to_phys((void *) (unsigned long) (vaddr)) |
51 | #define __va(paddr) phys_to_virt((unsigned long) (paddr)) | |
1da177e4 LT |
52 | |
53 | #define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT) | |
54 | ||
55 | extern unsigned long max_low_pfn; | |
56 | extern unsigned long min_low_pfn; | |
57 | extern unsigned long max_pfn; | |
58 | ||
59 | #ifdef CONFIG_MMU | |
60 | #define pfn_to_page(pfn) (mem_map + (pfn)) | |
61 | #define page_to_pfn(page) ((unsigned long) ((page) - mem_map)) | |
62 | #define pfn_valid(pfn) ((pfn) < max_mapnr) | |
63 | ||
64 | #else | |
65 | #define pfn_to_page(pfn) (&mem_map[(pfn) - (PAGE_OFFSET >> PAGE_SHIFT)]) | |
66 | #define page_to_pfn(page) ((PAGE_OFFSET >> PAGE_SHIFT) + (unsigned long) ((page) - mem_map)) | |
67 | #define pfn_valid(pfn) ((pfn) >= min_low_pfn && (pfn) < max_low_pfn) | |
68 | ||
69 | #endif | |
70 | ||
71 | #define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT) | |
72 | #define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT) | |
73 | ||
74 | ||
75 | #ifdef CONFIG_MMU | |
76 | #define VM_DATA_DEFAULT_FLAGS \ | |
77 | (VM_READ | VM_WRITE | \ | |
78 | ((current->personality & READ_IMPLIES_EXEC) ? VM_EXEC : 0 ) | \ | |
79 | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) | |
80 | #endif | |
81 | ||
82 | #endif /* __ASSEMBLY__ */ | |
83 | ||
84 | #endif /* __KERNEL__ */ | |
85 | ||
86 | #ifdef CONFIG_CONTIGUOUS_PAGE_ALLOC | |
87 | #define WANT_PAGE_VIRTUAL 1 | |
88 | #endif | |
89 | ||
fd4fd5aa SR |
90 | #include <asm-generic/page.h> |
91 | ||
1da177e4 | 92 | #endif /* _ASM_PAGE_H */ |