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1da177e4 LT |
1 | #ifndef _PARISC_PAGE_H |
2 | #define _PARISC_PAGE_H | |
3 | ||
1da177e4 | 4 | #ifdef __KERNEL__ |
2fd83038 HD |
5 | |
6 | #if defined(CONFIG_PARISC_PAGE_SIZE_4KB) | |
ac7fb273 | 7 | # define PAGE_SHIFT 12 |
2fd83038 | 8 | #elif defined(CONFIG_PARISC_PAGE_SIZE_16KB) |
ac7fb273 | 9 | # define PAGE_SHIFT 14 |
2fd83038 | 10 | #elif defined(CONFIG_PARISC_PAGE_SIZE_64KB) |
ac7fb273 | 11 | # define PAGE_SHIFT 16 |
2fd83038 HD |
12 | #else |
13 | # error "unknown default kernel page size" | |
14 | #endif | |
15 | #define PAGE_SIZE (1UL << PAGE_SHIFT) | |
16 | #define PAGE_MASK (~(PAGE_SIZE-1)) | |
17 | ||
18 | ||
1da177e4 LT |
19 | #ifndef __ASSEMBLY__ |
20 | ||
21 | #include <asm/types.h> | |
22 | #include <asm/cache.h> | |
23 | ||
24 | #define clear_page(page) memset((void *)(page), 0, PAGE_SIZE) | |
25 | #define copy_page(to,from) copy_user_page_asm((void *)(to), (void *)(from)) | |
26 | ||
27 | struct page; | |
28 | ||
20f4d3cb JB |
29 | void copy_user_page_asm(void *to, void *from); |
30 | void copy_user_page(void *vto, void *vfrom, unsigned long vaddr, | |
31 | struct page *pg); | |
32 | void clear_user_page(void *page, unsigned long vaddr, struct page *pg); | |
1da177e4 LT |
33 | |
34 | /* | |
35 | * These are used to make use of C type-checking.. | |
36 | */ | |
b31059f7 HD |
37 | #define STRICT_MM_TYPECHECKS |
38 | #ifdef STRICT_MM_TYPECHECKS | |
39 | typedef struct { unsigned long pte; | |
40 | #if !defined(CONFIG_64BIT) | |
41 | unsigned long future_flags; | |
42 | /* XXX: it's possible to remove future_flags and change BITS_PER_PTE_ENTRY | |
43 | to 2, but then strangely the identical 32bit kernel boots on a | |
44 | c3000(pa20), but not any longer on a 715(pa11). | |
45 | Still investigating... HelgeD. | |
46 | */ | |
1da177e4 | 47 | #endif |
b31059f7 HD |
48 | } pte_t; /* either 32 or 64bit */ |
49 | ||
1da177e4 LT |
50 | /* NOTE: even on 64 bits, these entries are __u32 because we allocate |
51 | * the pmd and pgd in ZONE_DMA (i.e. under 4GB) */ | |
52 | typedef struct { __u32 pmd; } pmd_t; | |
53 | typedef struct { __u32 pgd; } pgd_t; | |
54 | typedef struct { unsigned long pgprot; } pgprot_t; | |
55 | ||
56 | #define pte_val(x) ((x).pte) | |
1da177e4 LT |
57 | /* These do not work lvalues, so make sure we don't use them as such. */ |
58 | #define pmd_val(x) ((x).pmd + 0) | |
59 | #define pgd_val(x) ((x).pgd + 0) | |
60 | #define pgprot_val(x) ((x).pgprot) | |
61 | ||
1da177e4 LT |
62 | #define __pte(x) ((pte_t) { (x) } ) |
63 | #define __pmd(x) ((pmd_t) { (x) } ) | |
64 | #define __pgd(x) ((pgd_t) { (x) } ) | |
65 | #define __pgprot(x) ((pgprot_t) { (x) } ) | |
66 | ||
b31059f7 HD |
67 | #define __pmd_val_set(x,n) (x).pmd = (n) |
68 | #define __pgd_val_set(x,n) (x).pgd = (n) | |
69 | ||
70 | #else | |
71 | /* | |
72 | * .. while these make it easier on the compiler | |
73 | */ | |
74 | typedef unsigned long pte_t; | |
75 | typedef __u32 pmd_t; | |
76 | typedef __u32 pgd_t; | |
77 | typedef unsigned long pgprot_t; | |
78 | ||
79 | #define pte_val(x) (x) | |
80 | #define pmd_val(x) (x) | |
81 | #define pgd_val(x) (x) | |
82 | #define pgprot_val(x) (x) | |
83 | ||
84 | #define __pte(x) (x) | |
85 | #define __pmd(x) (x) | |
86 | #define __pgd(x) (x) | |
87 | #define __pgprot(x) (x) | |
88 | ||
89 | #define __pmd_val_set(x,n) (x) = (n) | |
90 | #define __pgd_val_set(x,n) (x) = (n) | |
91 | ||
92 | #endif /* STRICT_MM_TYPECHECKS */ | |
93 | ||
94 | ||
1da177e4 LT |
95 | typedef struct __physmem_range { |
96 | unsigned long start_pfn; | |
97 | unsigned long pages; /* PAGE_SIZE pages */ | |
98 | } physmem_range_t; | |
99 | ||
100 | extern physmem_range_t pmem_ranges[]; | |
101 | extern int npmem_ranges; | |
102 | ||
103 | #endif /* !__ASSEMBLY__ */ | |
104 | ||
105 | /* WARNING: The definitions below must match exactly to sizeof(pte_t) | |
106 | * etc | |
107 | */ | |
513e7ecd | 108 | #ifdef CONFIG_64BIT |
1da177e4 LT |
109 | #define BITS_PER_PTE_ENTRY 3 |
110 | #define BITS_PER_PMD_ENTRY 2 | |
111 | #define BITS_PER_PGD_ENTRY 2 | |
112 | #else | |
113 | #define BITS_PER_PTE_ENTRY 3 | |
114 | #define BITS_PER_PMD_ENTRY 2 | |
115 | #define BITS_PER_PGD_ENTRY BITS_PER_PMD_ENTRY | |
116 | #endif | |
117 | #define PGD_ENTRY_SIZE (1UL << BITS_PER_PGD_ENTRY) | |
118 | #define PMD_ENTRY_SIZE (1UL << BITS_PER_PMD_ENTRY) | |
119 | #define PTE_ENTRY_SIZE (1UL << BITS_PER_PTE_ENTRY) | |
120 | ||
121 | /* to align the pointer to the (next) page boundary */ | |
122 | #define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK) | |
123 | ||
124 | ||
125 | #define LINUX_GATEWAY_SPACE 0 | |
126 | ||
127 | /* This governs the relationship between virtual and physical addresses. | |
128 | * If you alter it, make sure to take care of our various fixed mapping | |
129 | * segments in fixmap.h */ | |
caa451f3 KM |
130 | #ifdef CONFIG_64BIT |
131 | #define __PAGE_OFFSET (0x40000000) /* 1GB */ | |
132 | #else | |
133 | #define __PAGE_OFFSET (0x10000000) /* 256MB */ | |
134 | #endif | |
1da177e4 LT |
135 | |
136 | #define PAGE_OFFSET ((unsigned long)__PAGE_OFFSET) | |
137 | ||
138 | /* The size of the gateway page (we leave lots of room for expansion) */ | |
139 | #define GATEWAY_PAGE_SIZE 0x4000 | |
140 | ||
141 | /* The start of the actual kernel binary---used in vmlinux.lds.S | |
142 | * Leave some space after __PAGE_OFFSET for detecting kernel null | |
143 | * ptr derefs */ | |
144 | #define KERNEL_BINARY_TEXT_START (__PAGE_OFFSET + 0x100000) | |
145 | ||
146 | /* These macros don't work for 64-bit C code -- don't allow in C at all */ | |
147 | #ifdef __ASSEMBLY__ | |
148 | # define PA(x) ((x)-__PAGE_OFFSET) | |
149 | # define VA(x) ((x)+__PAGE_OFFSET) | |
150 | #endif | |
151 | #define __pa(x) ((unsigned long)(x)-PAGE_OFFSET) | |
152 | #define __va(x) ((void *)((unsigned long)(x)+PAGE_OFFSET)) | |
153 | ||
154 | #ifndef CONFIG_DISCONTIGMEM | |
1da177e4 LT |
155 | #define pfn_valid(pfn) ((pfn) < max_mapnr) |
156 | #endif /* CONFIG_DISCONTIGMEM */ | |
157 | ||
e8b736c8 HD |
158 | #ifdef CONFIG_HUGETLB_PAGE |
159 | #define HPAGE_SHIFT 22 /* 4MB (is this fixed?) */ | |
160 | #define HPAGE_SIZE ((1UL) << HPAGE_SHIFT) | |
161 | #define HPAGE_MASK (~(HPAGE_SIZE - 1)) | |
162 | #define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT) | |
163 | #endif | |
164 | ||
1da177e4 LT |
165 | #define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT) |
166 | ||
167 | #define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT) | |
168 | #define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT) | |
169 | ||
170 | #define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \ | |
171 | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) | |
172 | ||
0d833b41 | 173 | #include <asm-generic/memory_model.h> |
fd4fd5aa SR |
174 | #include <asm-generic/page.h> |
175 | ||
ac7fb273 MW |
176 | #endif /* __KERNEL__ */ |
177 | ||
1da177e4 | 178 | #endif /* _PARISC_PAGE_H */ |