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1da177e4 LT |
1 | #ifndef _PARISC_PAGE_H |
2 | #define _PARISC_PAGE_H | |
3 | ||
2fd83038 HD |
4 | #if !defined(__KERNEL__) |
5 | /* this is for userspace applications (4k page size) */ | |
6 | # define PAGE_SHIFT 12 /* 4k */ | |
7 | # define PAGE_SIZE (1UL << PAGE_SHIFT) | |
8 | # define PAGE_MASK (~(PAGE_SIZE-1)) | |
9 | #endif | |
10 | ||
1da177e4 LT |
11 | |
12 | #ifdef __KERNEL__ | |
13 | #include <linux/config.h> | |
2fd83038 HD |
14 | |
15 | #if defined(CONFIG_PARISC_PAGE_SIZE_4KB) | |
16 | # define PAGE_SHIFT 12 /* 4k */ | |
17 | #elif defined(CONFIG_PARISC_PAGE_SIZE_16KB) | |
18 | # define PAGE_SHIFT 14 /* 16k */ | |
19 | #elif defined(CONFIG_PARISC_PAGE_SIZE_64KB) | |
20 | # define PAGE_SHIFT 16 /* 64k */ | |
21 | #else | |
22 | # error "unknown default kernel page size" | |
23 | #endif | |
24 | #define PAGE_SIZE (1UL << PAGE_SHIFT) | |
25 | #define PAGE_MASK (~(PAGE_SIZE-1)) | |
26 | ||
27 | ||
1da177e4 LT |
28 | #ifndef __ASSEMBLY__ |
29 | ||
30 | #include <asm/types.h> | |
31 | #include <asm/cache.h> | |
32 | ||
33 | #define clear_page(page) memset((void *)(page), 0, PAGE_SIZE) | |
34 | #define copy_page(to,from) copy_user_page_asm((void *)(to), (void *)(from)) | |
35 | ||
36 | struct page; | |
37 | ||
38 | extern void purge_kernel_dcache_page(unsigned long); | |
39 | extern void copy_user_page_asm(void *to, void *from); | |
40 | extern void clear_user_page_asm(void *page, unsigned long vaddr); | |
41 | ||
42 | static inline void | |
43 | copy_user_page(void *vto, void *vfrom, unsigned long vaddr, struct page *pg) | |
44 | { | |
45 | copy_user_page_asm(vto, vfrom); | |
ba575833 | 46 | flush_kernel_dcache_page_asm(vto); |
1da177e4 LT |
47 | /* XXX: ppc flushes icache too, should we? */ |
48 | } | |
49 | ||
50 | static inline void | |
51 | clear_user_page(void *page, unsigned long vaddr, struct page *pg) | |
52 | { | |
53 | purge_kernel_dcache_page((unsigned long)page); | |
54 | clear_user_page_asm(page, vaddr); | |
55 | } | |
56 | ||
57 | /* | |
58 | * These are used to make use of C type-checking.. | |
59 | */ | |
b31059f7 HD |
60 | #define STRICT_MM_TYPECHECKS |
61 | #ifdef STRICT_MM_TYPECHECKS | |
62 | typedef struct { unsigned long pte; | |
63 | #if !defined(CONFIG_64BIT) | |
64 | unsigned long future_flags; | |
65 | /* XXX: it's possible to remove future_flags and change BITS_PER_PTE_ENTRY | |
66 | to 2, but then strangely the identical 32bit kernel boots on a | |
67 | c3000(pa20), but not any longer on a 715(pa11). | |
68 | Still investigating... HelgeD. | |
69 | */ | |
1da177e4 | 70 | #endif |
b31059f7 HD |
71 | } pte_t; /* either 32 or 64bit */ |
72 | ||
1da177e4 LT |
73 | /* NOTE: even on 64 bits, these entries are __u32 because we allocate |
74 | * the pmd and pgd in ZONE_DMA (i.e. under 4GB) */ | |
75 | typedef struct { __u32 pmd; } pmd_t; | |
76 | typedef struct { __u32 pgd; } pgd_t; | |
77 | typedef struct { unsigned long pgprot; } pgprot_t; | |
78 | ||
79 | #define pte_val(x) ((x).pte) | |
1da177e4 LT |
80 | /* These do not work lvalues, so make sure we don't use them as such. */ |
81 | #define pmd_val(x) ((x).pmd + 0) | |
82 | #define pgd_val(x) ((x).pgd + 0) | |
83 | #define pgprot_val(x) ((x).pgprot) | |
84 | ||
1da177e4 LT |
85 | #define __pte(x) ((pte_t) { (x) } ) |
86 | #define __pmd(x) ((pmd_t) { (x) } ) | |
87 | #define __pgd(x) ((pgd_t) { (x) } ) | |
88 | #define __pgprot(x) ((pgprot_t) { (x) } ) | |
89 | ||
b31059f7 HD |
90 | #define __pmd_val_set(x,n) (x).pmd = (n) |
91 | #define __pgd_val_set(x,n) (x).pgd = (n) | |
92 | ||
93 | #else | |
94 | /* | |
95 | * .. while these make it easier on the compiler | |
96 | */ | |
97 | typedef unsigned long pte_t; | |
98 | typedef __u32 pmd_t; | |
99 | typedef __u32 pgd_t; | |
100 | typedef unsigned long pgprot_t; | |
101 | ||
102 | #define pte_val(x) (x) | |
103 | #define pmd_val(x) (x) | |
104 | #define pgd_val(x) (x) | |
105 | #define pgprot_val(x) (x) | |
106 | ||
107 | #define __pte(x) (x) | |
108 | #define __pmd(x) (x) | |
109 | #define __pgd(x) (x) | |
110 | #define __pgprot(x) (x) | |
111 | ||
112 | #define __pmd_val_set(x,n) (x) = (n) | |
113 | #define __pgd_val_set(x,n) (x) = (n) | |
114 | ||
115 | #endif /* STRICT_MM_TYPECHECKS */ | |
116 | ||
117 | ||
1da177e4 LT |
118 | typedef struct __physmem_range { |
119 | unsigned long start_pfn; | |
120 | unsigned long pages; /* PAGE_SIZE pages */ | |
121 | } physmem_range_t; | |
122 | ||
123 | extern physmem_range_t pmem_ranges[]; | |
124 | extern int npmem_ranges; | |
125 | ||
126 | #endif /* !__ASSEMBLY__ */ | |
127 | ||
128 | /* WARNING: The definitions below must match exactly to sizeof(pte_t) | |
129 | * etc | |
130 | */ | |
131 | #ifdef __LP64__ | |
132 | #define BITS_PER_PTE_ENTRY 3 | |
133 | #define BITS_PER_PMD_ENTRY 2 | |
134 | #define BITS_PER_PGD_ENTRY 2 | |
135 | #else | |
136 | #define BITS_PER_PTE_ENTRY 3 | |
137 | #define BITS_PER_PMD_ENTRY 2 | |
138 | #define BITS_PER_PGD_ENTRY BITS_PER_PMD_ENTRY | |
139 | #endif | |
140 | #define PGD_ENTRY_SIZE (1UL << BITS_PER_PGD_ENTRY) | |
141 | #define PMD_ENTRY_SIZE (1UL << BITS_PER_PMD_ENTRY) | |
142 | #define PTE_ENTRY_SIZE (1UL << BITS_PER_PTE_ENTRY) | |
143 | ||
144 | /* to align the pointer to the (next) page boundary */ | |
145 | #define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK) | |
146 | ||
147 | ||
148 | #define LINUX_GATEWAY_SPACE 0 | |
149 | ||
150 | /* This governs the relationship between virtual and physical addresses. | |
151 | * If you alter it, make sure to take care of our various fixed mapping | |
152 | * segments in fixmap.h */ | |
153 | #define __PAGE_OFFSET (0x10000000) | |
154 | ||
155 | #define PAGE_OFFSET ((unsigned long)__PAGE_OFFSET) | |
156 | ||
157 | /* The size of the gateway page (we leave lots of room for expansion) */ | |
158 | #define GATEWAY_PAGE_SIZE 0x4000 | |
159 | ||
160 | /* The start of the actual kernel binary---used in vmlinux.lds.S | |
161 | * Leave some space after __PAGE_OFFSET for detecting kernel null | |
162 | * ptr derefs */ | |
163 | #define KERNEL_BINARY_TEXT_START (__PAGE_OFFSET + 0x100000) | |
164 | ||
165 | /* These macros don't work for 64-bit C code -- don't allow in C at all */ | |
166 | #ifdef __ASSEMBLY__ | |
167 | # define PA(x) ((x)-__PAGE_OFFSET) | |
168 | # define VA(x) ((x)+__PAGE_OFFSET) | |
169 | #endif | |
170 | #define __pa(x) ((unsigned long)(x)-PAGE_OFFSET) | |
171 | #define __va(x) ((void *)((unsigned long)(x)+PAGE_OFFSET)) | |
172 | ||
173 | #ifndef CONFIG_DISCONTIGMEM | |
1da177e4 LT |
174 | #define pfn_valid(pfn) ((pfn) < max_mapnr) |
175 | #endif /* CONFIG_DISCONTIGMEM */ | |
176 | ||
e8b736c8 HD |
177 | #ifdef CONFIG_HUGETLB_PAGE |
178 | #define HPAGE_SHIFT 22 /* 4MB (is this fixed?) */ | |
179 | #define HPAGE_SIZE ((1UL) << HPAGE_SHIFT) | |
180 | #define HPAGE_MASK (~(HPAGE_SIZE - 1)) | |
181 | #define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT) | |
182 | #endif | |
183 | ||
1da177e4 LT |
184 | #define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT) |
185 | ||
186 | #define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT) | |
187 | #define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT) | |
188 | ||
189 | #define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \ | |
190 | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) | |
191 | ||
192 | #endif /* __KERNEL__ */ | |
193 | ||
0d833b41 | 194 | #include <asm-generic/memory_model.h> |
fd4fd5aa SR |
195 | #include <asm-generic/page.h> |
196 | ||
1da177e4 | 197 | #endif /* _PARISC_PAGE_H */ |