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1da177e4 LT |
1 | #ifndef _ASM_M32R_PAGE_H |
2 | #define _ASM_M32R_PAGE_H | |
3 | ||
1da177e4 LT |
4 | |
5 | /* PAGE_SHIFT determines the page size */ | |
6 | #define PAGE_SHIFT 12 | |
7 | #define PAGE_SIZE (1UL << PAGE_SHIFT) | |
8 | #define PAGE_MASK (~(PAGE_SIZE-1)) | |
9 | ||
10 | #ifdef __KERNEL__ | |
11 | #ifndef __ASSEMBLY__ | |
12 | ||
13 | extern void clear_page(void *to); | |
14 | extern void copy_page(void *to, void *from); | |
15 | ||
16 | #define clear_user_page(page, vaddr, pg) clear_page(page) | |
17 | #define copy_user_page(to, from, vaddr, pg) copy_page(to, from) | |
18 | ||
19 | #define alloc_zeroed_user_highpage(vma, vaddr) alloc_page_vma(GFP_HIGHUSER | __GFP_ZERO, vma, vaddr) | |
20 | #define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE | |
21 | ||
22 | /* | |
23 | * These are used to make use of C type-checking.. | |
24 | */ | |
25 | typedef struct { unsigned long pte; } pte_t; | |
26 | typedef struct { unsigned long pmd; } pmd_t; | |
27 | typedef struct { unsigned long pgd; } pgd_t; | |
28 | #define pte_val(x) ((x).pte) | |
29 | #define PTE_MASK PAGE_MASK | |
30 | ||
31 | typedef struct { unsigned long pgprot; } pgprot_t; | |
32 | ||
33 | #define pmd_val(x) ((x).pmd) | |
34 | #define pgd_val(x) ((x).pgd) | |
35 | #define pgprot_val(x) ((x).pgprot) | |
36 | ||
37 | #define __pte(x) ((pte_t) { (x) } ) | |
38 | #define __pmd(x) ((pmd_t) { (x) } ) | |
39 | #define __pgd(x) ((pgd_t) { (x) } ) | |
40 | #define __pgprot(x) ((pgprot_t) { (x) } ) | |
41 | ||
42 | #endif /* !__ASSEMBLY__ */ | |
43 | ||
44 | /* to align the pointer to the (next) page boundary */ | |
45 | #define PAGE_ALIGN(addr) (((addr) + PAGE_SIZE - 1) & PAGE_MASK) | |
46 | ||
47 | /* | |
48 | * This handles the memory map.. We could make this a config | |
49 | * option, but too many people screw it up, and too few need | |
50 | * it. | |
51 | * | |
52 | * A __PAGE_OFFSET of 0xC0000000 means that the kernel has | |
53 | * a virtual address space of one gigabyte, which limits the | |
54 | * amount of physical memory you can use to about 950MB. | |
55 | * | |
56 | * If you want more physical memory than this then see the CONFIG_HIGHMEM4G | |
57 | * and CONFIG_HIGHMEM64G options in the kernel configuration. | |
58 | */ | |
59 | ||
60 | ||
61 | /* This handles the memory map.. */ | |
62 | ||
1da177e4 LT |
63 | #define __MEMORY_START CONFIG_MEMORY_START |
64 | #define __MEMORY_SIZE CONFIG_MEMORY_SIZE | |
65 | ||
66 | #ifdef CONFIG_MMU | |
67 | #define __PAGE_OFFSET (0x80000000) | |
68 | #else | |
69 | #define __PAGE_OFFSET (0x00000000) | |
70 | #endif | |
71 | ||
72 | #define PAGE_OFFSET ((unsigned long)__PAGE_OFFSET) | |
73 | #define __pa(x) ((unsigned long)(x) - PAGE_OFFSET) | |
74 | #define __va(x) ((void *)((unsigned long)(x) + PAGE_OFFSET)) | |
75 | ||
76 | #ifndef CONFIG_DISCONTIGMEM | |
77 | #define PFN_BASE (CONFIG_MEMORY_START >> PAGE_SHIFT) | |
7126cffe | 78 | #define ARCH_PFN_OFFSET PFN_BASE |
1da177e4 LT |
79 | #define pfn_valid(pfn) (((pfn) - PFN_BASE) < max_mapnr) |
80 | #endif /* !CONFIG_DISCONTIGMEM */ | |
81 | ||
82 | #define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT) | |
83 | #define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT) | |
84 | ||
85 | #define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \ | |
86 | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC ) | |
87 | ||
88 | #define devmem_is_allowed(x) 1 | |
89 | ||
7126cffe | 90 | #include <asm-generic/memory_model.h> |
fd4fd5aa SR |
91 | #include <asm-generic/page.h> |
92 | ||
47dbec79 | 93 | #endif /* __KERNEL__ */ |
1da177e4 LT |
94 | #endif /* _ASM_M32R_PAGE_H */ |
95 |