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1da177e4 LT |
1 | #ifndef _PARISC_PAGE_H |
2 | #define _PARISC_PAGE_H | |
3 | ||
1c593571 SR |
4 | #include <linux/const.h> |
5 | ||
2fd83038 | 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 | |
1c593571 | 15 | #define PAGE_SIZE (_AC(1,UL) << PAGE_SHIFT) |
2fd83038 HD |
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 | ||
76334539 JDA |
24 | #define clear_page(page) clear_page_asm((void *)(page)) |
25 | #define copy_page(to, from) copy_page_asm((void *)(to), (void *)(from)) | |
1da177e4 LT |
26 | |
27 | struct page; | |
28 | ||
76334539 JDA |
29 | void clear_page_asm(void *page); |
30 | void copy_page_asm(void *to, void *from); | |
f8dae006 | 31 | #define clear_user_page(vto, vaddr, page) clear_page_asm(vto) |
57737c49 HD |
32 | void copy_user_page(void *vto, void *vfrom, unsigned long vaddr, |
33 | struct page *pg); | |
76334539 | 34 | |
1da177e4 LT |
35 | /* |
36 | * These are used to make use of C type-checking.. | |
37 | */ | |
b31059f7 HD |
38 | #define STRICT_MM_TYPECHECKS |
39 | #ifdef STRICT_MM_TYPECHECKS | |
48d27cb2 | 40 | typedef struct { unsigned long pte; } pte_t; /* either 32 or 64bit */ |
b31059f7 | 41 | |
1da177e4 LT |
42 | /* NOTE: even on 64 bits, these entries are __u32 because we allocate |
43 | * the pmd and pgd in ZONE_DMA (i.e. under 4GB) */ | |
44 | typedef struct { __u32 pmd; } pmd_t; | |
45 | typedef struct { __u32 pgd; } pgd_t; | |
46 | typedef struct { unsigned long pgprot; } pgprot_t; | |
47 | ||
48 | #define pte_val(x) ((x).pte) | |
1da177e4 LT |
49 | /* These do not work lvalues, so make sure we don't use them as such. */ |
50 | #define pmd_val(x) ((x).pmd + 0) | |
51 | #define pgd_val(x) ((x).pgd + 0) | |
52 | #define pgprot_val(x) ((x).pgprot) | |
53 | ||
1da177e4 LT |
54 | #define __pte(x) ((pte_t) { (x) } ) |
55 | #define __pmd(x) ((pmd_t) { (x) } ) | |
56 | #define __pgd(x) ((pgd_t) { (x) } ) | |
57 | #define __pgprot(x) ((pgprot_t) { (x) } ) | |
58 | ||
b31059f7 HD |
59 | #define __pmd_val_set(x,n) (x).pmd = (n) |
60 | #define __pgd_val_set(x,n) (x).pgd = (n) | |
61 | ||
62 | #else | |
63 | /* | |
64 | * .. while these make it easier on the compiler | |
65 | */ | |
66 | typedef unsigned long pte_t; | |
67 | typedef __u32 pmd_t; | |
68 | typedef __u32 pgd_t; | |
69 | typedef unsigned long pgprot_t; | |
70 | ||
71 | #define pte_val(x) (x) | |
72 | #define pmd_val(x) (x) | |
73 | #define pgd_val(x) (x) | |
74 | #define pgprot_val(x) (x) | |
75 | ||
76 | #define __pte(x) (x) | |
77 | #define __pmd(x) (x) | |
78 | #define __pgd(x) (x) | |
79 | #define __pgprot(x) (x) | |
80 | ||
81 | #define __pmd_val_set(x,n) (x) = (n) | |
82 | #define __pgd_val_set(x,n) (x) = (n) | |
83 | ||
84 | #endif /* STRICT_MM_TYPECHECKS */ | |
85 | ||
2f569afd | 86 | typedef struct page *pgtable_t; |
b31059f7 | 87 | |
1da177e4 LT |
88 | typedef struct __physmem_range { |
89 | unsigned long start_pfn; | |
90 | unsigned long pages; /* PAGE_SIZE pages */ | |
91 | } physmem_range_t; | |
92 | ||
93 | extern physmem_range_t pmem_ranges[]; | |
94 | extern int npmem_ranges; | |
95 | ||
96 | #endif /* !__ASSEMBLY__ */ | |
97 | ||
98 | /* WARNING: The definitions below must match exactly to sizeof(pte_t) | |
99 | * etc | |
100 | */ | |
513e7ecd | 101 | #ifdef CONFIG_64BIT |
1da177e4 LT |
102 | #define BITS_PER_PTE_ENTRY 3 |
103 | #define BITS_PER_PMD_ENTRY 2 | |
104 | #define BITS_PER_PGD_ENTRY 2 | |
105 | #else | |
48d27cb2 | 106 | #define BITS_PER_PTE_ENTRY 2 |
1da177e4 LT |
107 | #define BITS_PER_PMD_ENTRY 2 |
108 | #define BITS_PER_PGD_ENTRY BITS_PER_PMD_ENTRY | |
109 | #endif | |
110 | #define PGD_ENTRY_SIZE (1UL << BITS_PER_PGD_ENTRY) | |
111 | #define PMD_ENTRY_SIZE (1UL << BITS_PER_PMD_ENTRY) | |
112 | #define PTE_ENTRY_SIZE (1UL << BITS_PER_PTE_ENTRY) | |
113 | ||
1da177e4 LT |
114 | #define LINUX_GATEWAY_SPACE 0 |
115 | ||
116 | /* This governs the relationship between virtual and physical addresses. | |
117 | * If you alter it, make sure to take care of our various fixed mapping | |
118 | * segments in fixmap.h */ | |
caa451f3 KM |
119 | #ifdef CONFIG_64BIT |
120 | #define __PAGE_OFFSET (0x40000000) /* 1GB */ | |
121 | #else | |
122 | #define __PAGE_OFFSET (0x10000000) /* 256MB */ | |
123 | #endif | |
1da177e4 LT |
124 | |
125 | #define PAGE_OFFSET ((unsigned long)__PAGE_OFFSET) | |
126 | ||
127 | /* The size of the gateway page (we leave lots of room for expansion) */ | |
128 | #define GATEWAY_PAGE_SIZE 0x4000 | |
129 | ||
130 | /* The start of the actual kernel binary---used in vmlinux.lds.S | |
131 | * Leave some space after __PAGE_OFFSET for detecting kernel null | |
132 | * ptr derefs */ | |
133 | #define KERNEL_BINARY_TEXT_START (__PAGE_OFFSET + 0x100000) | |
134 | ||
135 | /* These macros don't work for 64-bit C code -- don't allow in C at all */ | |
136 | #ifdef __ASSEMBLY__ | |
137 | # define PA(x) ((x)-__PAGE_OFFSET) | |
138 | # define VA(x) ((x)+__PAGE_OFFSET) | |
139 | #endif | |
140 | #define __pa(x) ((unsigned long)(x)-PAGE_OFFSET) | |
141 | #define __va(x) ((void *)((unsigned long)(x)+PAGE_OFFSET)) | |
142 | ||
143 | #ifndef CONFIG_DISCONTIGMEM | |
1da177e4 LT |
144 | #define pfn_valid(pfn) ((pfn) < max_mapnr) |
145 | #endif /* CONFIG_DISCONTIGMEM */ | |
146 | ||
e8b736c8 | 147 | #ifdef CONFIG_HUGETLB_PAGE |
1f25ad26 | 148 | #define HPAGE_SHIFT PMD_SHIFT /* fixed for transparent huge pages */ |
e8b736c8 HD |
149 | #define HPAGE_SIZE ((1UL) << HPAGE_SHIFT) |
150 | #define HPAGE_MASK (~(HPAGE_SIZE - 1)) | |
151 | #define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT) | |
1f25ad26 HD |
152 | |
153 | #if defined(CONFIG_64BIT) && defined(CONFIG_PARISC_PAGE_SIZE_4KB) | |
154 | # define REAL_HPAGE_SHIFT 20 /* 20 = 1MB */ | |
155 | # define _HUGE_PAGE_SIZE_ENCODING_DEFAULT _PAGE_SIZE_ENCODING_1M | |
156 | #elif !defined(CONFIG_64BIT) && defined(CONFIG_PARISC_PAGE_SIZE_4KB) | |
157 | # define REAL_HPAGE_SHIFT 22 /* 22 = 4MB */ | |
158 | # define _HUGE_PAGE_SIZE_ENCODING_DEFAULT _PAGE_SIZE_ENCODING_4M | |
159 | #else | |
160 | # define REAL_HPAGE_SHIFT 24 /* 24 = 16MB */ | |
161 | # define _HUGE_PAGE_SIZE_ENCODING_DEFAULT _PAGE_SIZE_ENCODING_16M | |
e8b736c8 | 162 | #endif |
1f25ad26 | 163 | #endif /* CONFIG_HUGETLB_PAGE */ |
e8b736c8 | 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> |
5b17e1cd | 174 | #include <asm-generic/getorder.h> |
4a8a0788 REB |
175 | #include <asm/pdc.h> |
176 | ||
177 | #define PAGE0 ((struct zeropage *)__PAGE_OFFSET) | |
178 | ||
179 | /* DEFINITION OF THE ZERO-PAGE (PAG0) */ | |
180 | /* based on work by Jason Eckhardt (jason@equator.com) */ | |
fd4fd5aa | 181 | |
1da177e4 | 182 | #endif /* _PARISC_PAGE_H */ |