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1 | #ifndef _ASM_M32R_PAGE_H |
2 | #define _ASM_M32R_PAGE_H | |
3 | ||
4 | #include <linux/config.h> | |
5 | ||
6 | /* PAGE_SHIFT determines the page size */ | |
7 | #define PAGE_SHIFT 12 | |
8 | #define PAGE_SIZE (1UL << PAGE_SHIFT) | |
9 | #define PAGE_MASK (~(PAGE_SIZE-1)) | |
10 | ||
11 | #ifdef __KERNEL__ | |
12 | #ifndef __ASSEMBLY__ | |
13 | ||
14 | extern void clear_page(void *to); | |
15 | extern void copy_page(void *to, void *from); | |
16 | ||
17 | #define clear_user_page(page, vaddr, pg) clear_page(page) | |
18 | #define copy_user_page(to, from, vaddr, pg) copy_page(to, from) | |
19 | ||
20 | #define alloc_zeroed_user_highpage(vma, vaddr) alloc_page_vma(GFP_HIGHUSER | __GFP_ZERO, vma, vaddr) | |
21 | #define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE | |
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 pmd; } pmd_t; | |
28 | typedef struct { unsigned long pgd; } pgd_t; | |
29 | #define pte_val(x) ((x).pte) | |
30 | #define PTE_MASK PAGE_MASK | |
31 | ||
32 | typedef struct { unsigned long pgprot; } pgprot_t; | |
33 | ||
34 | #define pmd_val(x) ((x).pmd) | |
35 | #define pgd_val(x) ((x).pgd) | |
36 | #define pgprot_val(x) ((x).pgprot) | |
37 | ||
38 | #define __pte(x) ((pte_t) { (x) } ) | |
39 | #define __pmd(x) ((pmd_t) { (x) } ) | |
40 | #define __pgd(x) ((pgd_t) { (x) } ) | |
41 | #define __pgprot(x) ((pgprot_t) { (x) } ) | |
42 | ||
43 | #endif /* !__ASSEMBLY__ */ | |
44 | ||
45 | /* to align the pointer to the (next) page boundary */ | |
46 | #define PAGE_ALIGN(addr) (((addr) + PAGE_SIZE - 1) & PAGE_MASK) | |
47 | ||
48 | /* | |
49 | * This handles the memory map.. We could make this a config | |
50 | * option, but too many people screw it up, and too few need | |
51 | * it. | |
52 | * | |
53 | * A __PAGE_OFFSET of 0xC0000000 means that the kernel has | |
54 | * a virtual address space of one gigabyte, which limits the | |
55 | * amount of physical memory you can use to about 950MB. | |
56 | * | |
57 | * If you want more physical memory than this then see the CONFIG_HIGHMEM4G | |
58 | * and CONFIG_HIGHMEM64G options in the kernel configuration. | |
59 | */ | |
60 | ||
61 | ||
62 | /* This handles the memory map.. */ | |
63 | ||
64 | #ifndef __ASSEMBLY__ | |
65 | ||
66 | /* Pure 2^n version of get_order */ | |
67 | static __inline__ int get_order(unsigned long size) | |
68 | { | |
69 | int order; | |
70 | ||
71 | size = (size - 1) >> (PAGE_SHIFT - 1); | |
72 | order = -1; | |
73 | do { | |
74 | size >>= 1; | |
75 | order++; | |
76 | } while (size); | |
77 | ||
78 | return order; | |
79 | } | |
80 | ||
81 | #endif /* __ASSEMBLY__ */ | |
82 | ||
83 | #define __MEMORY_START CONFIG_MEMORY_START | |
84 | #define __MEMORY_SIZE CONFIG_MEMORY_SIZE | |
85 | ||
86 | #ifdef CONFIG_MMU | |
87 | #define __PAGE_OFFSET (0x80000000) | |
88 | #else | |
89 | #define __PAGE_OFFSET (0x00000000) | |
90 | #endif | |
91 | ||
92 | #define PAGE_OFFSET ((unsigned long)__PAGE_OFFSET) | |
93 | #define __pa(x) ((unsigned long)(x) - PAGE_OFFSET) | |
94 | #define __va(x) ((void *)((unsigned long)(x) + PAGE_OFFSET)) | |
95 | ||
96 | #ifndef CONFIG_DISCONTIGMEM | |
97 | #define PFN_BASE (CONFIG_MEMORY_START >> PAGE_SHIFT) | |
98 | #define pfn_to_page(pfn) (mem_map + ((pfn) - PFN_BASE)) | |
99 | #define page_to_pfn(page) \ | |
100 | ((unsigned long)((page) - mem_map) + PFN_BASE) | |
101 | #define pfn_valid(pfn) (((pfn) - PFN_BASE) < max_mapnr) | |
102 | #endif /* !CONFIG_DISCONTIGMEM */ | |
103 | ||
104 | #define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT) | |
105 | #define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT) | |
106 | ||
107 | #define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \ | |
108 | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC ) | |
109 | ||
110 | #define devmem_is_allowed(x) 1 | |
111 | ||
112 | #endif /* __KERNEL__ */ | |
113 | ||
114 | #endif /* _ASM_M32R_PAGE_H */ | |
115 |