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1 | #ifndef __ASM_SH64_PAGE_H |
2 | #define __ASM_SH64_PAGE_H | |
3 | ||
4 | /* | |
5 | * This file is subject to the terms and conditions of the GNU General Public | |
6 | * License. See the file "COPYING" in the main directory of this archive | |
7 | * for more details. | |
8 | * | |
9 | * include/asm-sh64/page.h | |
10 | * | |
11 | * Copyright (C) 2000, 2001 Paolo Alberelli | |
12 | * Copyright (C) 2003, 2004 Paul Mundt | |
13 | * | |
14 | * benedict.gaster@superh.com 19th, 24th July 2002. | |
15 | * | |
16 | * Modified to take account of enabling for D-CACHE support. | |
17 | * | |
18 | */ | |
19 | ||
20 | #include <linux/config.h> | |
21 | ||
22 | /* PAGE_SHIFT determines the page size */ | |
23 | #define PAGE_SHIFT 12 | |
24 | #ifdef __ASSEMBLY__ | |
25 | #define PAGE_SIZE 4096 | |
26 | #else | |
27 | #define PAGE_SIZE (1UL << PAGE_SHIFT) | |
28 | #endif | |
29 | #define PAGE_MASK (~(PAGE_SIZE-1)) | |
30 | #define PTE_MASK PAGE_MASK | |
31 | ||
32 | #if defined(CONFIG_HUGETLB_PAGE_SIZE_64K) | |
33 | #define HPAGE_SHIFT 16 | |
34 | #elif defined(CONFIG_HUGETLB_PAGE_SIZE_1MB) | |
35 | #define HPAGE_SHIFT 20 | |
36 | #elif defined(CONFIG_HUGETLB_PAGE_SIZE_512MB) | |
37 | #define HPAGE_SHIFT 29 | |
38 | #endif | |
39 | ||
40 | #ifdef CONFIG_HUGETLB_PAGE | |
41 | #define HPAGE_SIZE (1UL << HPAGE_SHIFT) | |
42 | #define HPAGE_MASK (~(HPAGE_SIZE-1)) | |
43 | #define HUGETLB_PAGE_ORDER (HPAGE_SHIFT-PAGE_SHIFT) | |
44 | #endif | |
45 | ||
46 | #ifdef __KERNEL__ | |
47 | #ifndef __ASSEMBLY__ | |
48 | ||
49 | extern struct page *mem_map; | |
50 | extern void sh64_page_clear(void *page); | |
51 | extern void sh64_page_copy(void *from, void *to); | |
52 | ||
53 | #define clear_page(page) sh64_page_clear(page) | |
54 | #define copy_page(to,from) sh64_page_copy(from, to) | |
55 | ||
56 | #if defined(CONFIG_DCACHE_DISABLED) | |
57 | ||
58 | #define clear_user_page(page, vaddr, pg) clear_page(page) | |
59 | #define copy_user_page(to, from, vaddr, pg) copy_page(to, from) | |
60 | ||
61 | #else | |
62 | ||
63 | extern void clear_user_page(void *to, unsigned long address, struct page *pg); | |
64 | extern void copy_user_page(void *to, void *from, unsigned long address, struct page *pg); | |
65 | ||
66 | #endif /* defined(CONFIG_DCACHE_DISABLED) */ | |
67 | ||
68 | /* | |
69 | * These are used to make use of C type-checking.. | |
70 | */ | |
71 | typedef struct { unsigned long long pte; } pte_t; | |
72 | typedef struct { unsigned long pmd; } pmd_t; | |
73 | typedef struct { unsigned long pgd; } pgd_t; | |
74 | typedef struct { unsigned long pgprot; } pgprot_t; | |
75 | ||
76 | #define pte_val(x) ((x).pte) | |
77 | #define pmd_val(x) ((x).pmd) | |
78 | #define pgd_val(x) ((x).pgd) | |
79 | #define pgprot_val(x) ((x).pgprot) | |
80 | ||
81 | #define __pte(x) ((pte_t) { (x) } ) | |
82 | #define __pmd(x) ((pmd_t) { (x) } ) | |
83 | #define __pgd(x) ((pgd_t) { (x) } ) | |
84 | #define __pgprot(x) ((pgprot_t) { (x) } ) | |
85 | ||
86 | #endif /* !__ASSEMBLY__ */ | |
87 | ||
88 | /* to align the pointer to the (next) page boundary */ | |
89 | #define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK) | |
90 | ||
91 | /* | |
92 | * Kconfig defined. | |
93 | */ | |
94 | #define __MEMORY_START (CONFIG_MEMORY_START) | |
95 | #define PAGE_OFFSET (CONFIG_CACHED_MEMORY_OFFSET) | |
96 | ||
97 | #define __pa(x) ((unsigned long)(x)-PAGE_OFFSET) | |
98 | #define __va(x) ((void *)((unsigned long)(x)+PAGE_OFFSET)) | |
99 | #define MAP_NR(addr) ((__pa(addr)-__MEMORY_START) >> PAGE_SHIFT) | |
100 | #define VALID_PAGE(page) ((page - mem_map) < max_mapnr) | |
101 | ||
102 | #define phys_to_page(phys) (mem_map + (((phys) - __MEMORY_START) >> PAGE_SHIFT)) | |
103 | #define page_to_phys(page) (((page - mem_map) << PAGE_SHIFT) + __MEMORY_START) | |
104 | ||
105 | /* PFN start number, because of __MEMORY_START */ | |
106 | #define PFN_START (__MEMORY_START >> PAGE_SHIFT) | |
107 | ||
108 | #define pfn_to_page(pfn) (mem_map + (pfn) - PFN_START) | |
109 | #define page_to_pfn(page) ((unsigned long)((page) - mem_map) + PFN_START) | |
110 | #define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT) | |
111 | #define pfn_valid(pfn) (((pfn) - PFN_START) < max_mapnr) | |
112 | #define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT) | |
113 | ||
114 | #define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \ | |
115 | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) | |
116 | ||
117 | #ifndef __ASSEMBLY__ | |
118 | ||
119 | /* Pure 2^n version of get_order */ | |
120 | extern __inline__ int get_order(unsigned long size) | |
121 | { | |
122 | int order; | |
123 | ||
124 | size = (size-1) >> (PAGE_SHIFT-1); | |
125 | order = -1; | |
126 | do { | |
127 | size >>= 1; | |
128 | order++; | |
129 | } while (size); | |
130 | return order; | |
131 | } | |
132 | ||
133 | #endif | |
134 | ||
135 | #endif /* __KERNEL__ */ | |
136 | ||
137 | #endif /* __ASM_SH64_PAGE_H */ |