Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * Copyright (C) 2000 - 2003 Jeff Dike (jdike@addtoit.com) | |
3 | * Copyright 2003 PathScale, Inc. | |
4 | * Licensed under the GPL | |
5 | */ | |
6 | ||
7 | #ifndef __UM_PAGE_H | |
8 | #define __UM_PAGE_H | |
9 | ||
a7dfa940 | 10 | #include <linux/const.h> |
1da177e4 LT |
11 | |
12 | /* PAGE_SHIFT determines the page size */ | |
13 | #define PAGE_SHIFT 12 | |
a7dfa940 | 14 | #define PAGE_SIZE (_AC(1, UL) << PAGE_SHIFT) |
1da177e4 LT |
15 | #define PAGE_MASK (~(PAGE_SIZE-1)) |
16 | ||
a7dfa940 CG |
17 | #ifndef __ASSEMBLY__ |
18 | ||
19 | struct page; | |
20 | ||
21 | #include <linux/types.h> | |
22 | #include <asm/vm-flags.h> | |
23 | ||
1da177e4 LT |
24 | /* |
25 | * These are used to make use of C type-checking.. | |
26 | */ | |
27 | ||
28 | #define clear_page(page) memset((void *)(page), 0, PAGE_SIZE) | |
29 | #define copy_page(to,from) memcpy((void *)(to), (void *)(from), PAGE_SIZE) | |
30 | ||
31 | #define clear_user_page(page, vaddr, pg) clear_page(page) | |
32 | #define copy_user_page(to, from, vaddr, pg) copy_page(to, from) | |
33 | ||
c45166be | 34 | #if defined(CONFIG_3_LEVEL_PGTABLES) && !defined(CONFIG_64BIT) |
1da177e4 LT |
35 | |
36 | typedef struct { unsigned long pte_low, pte_high; } pte_t; | |
655e4ed0 | 37 | typedef struct { unsigned long pmd; } pmd_t; |
1da177e4 LT |
38 | typedef struct { unsigned long pgd; } pgd_t; |
39 | #define pte_val(x) ((x).pte_low | ((unsigned long long) (x).pte_high << 32)) | |
40 | ||
41 | #define pte_get_bits(pte, bits) ((pte).pte_low & (bits)) | |
42 | #define pte_set_bits(pte, bits) ((pte).pte_low |= (bits)) | |
43 | #define pte_clear_bits(pte, bits) ((pte).pte_low &= ~(bits)) | |
44 | #define pte_copy(to, from) ({ (to).pte_high = (from).pte_high; \ | |
45 | smp_wmb(); \ | |
46 | (to).pte_low = (from).pte_low; }) | |
47 | #define pte_is_zero(pte) (!((pte).pte_low & ~_PAGE_NEWPAGE) && !(pte).pte_high) | |
48 | #define pte_set_val(pte, phys, prot) \ | |
49 | ({ (pte).pte_high = (phys) >> 32; \ | |
50 | (pte).pte_low = (phys) | pgprot_val(prot); }) | |
51 | ||
f7fe8781 PBG |
52 | #define pmd_val(x) ((x).pmd) |
53 | #define __pmd(x) ((pmd_t) { (x) } ) | |
54 | ||
1da177e4 LT |
55 | typedef unsigned long long pfn_t; |
56 | typedef unsigned long long phys_t; | |
57 | ||
58 | #else | |
59 | ||
60 | typedef struct { unsigned long pte; } pte_t; | |
61 | typedef struct { unsigned long pgd; } pgd_t; | |
62 | ||
63 | #ifdef CONFIG_3_LEVEL_PGTABLES | |
64 | typedef struct { unsigned long pmd; } pmd_t; | |
65 | #define pmd_val(x) ((x).pmd) | |
66 | #define __pmd(x) ((pmd_t) { (x) } ) | |
67 | #endif | |
68 | ||
69 | #define pte_val(x) ((x).pte) | |
70 | ||
71 | ||
72 | #define pte_get_bits(p, bits) ((p).pte & (bits)) | |
73 | #define pte_set_bits(p, bits) ((p).pte |= (bits)) | |
74 | #define pte_clear_bits(p, bits) ((p).pte &= ~(bits)) | |
75 | #define pte_copy(to, from) ((to).pte = (from).pte) | |
76 | #define pte_is_zero(p) (!((p).pte & ~_PAGE_NEWPAGE)) | |
77 | #define pte_set_val(p, phys, prot) (p).pte = (phys | pgprot_val(prot)) | |
78 | ||
79 | typedef unsigned long pfn_t; | |
80 | typedef unsigned long phys_t; | |
81 | ||
82 | #endif | |
83 | ||
84 | typedef struct { unsigned long pgprot; } pgprot_t; | |
85 | ||
2f569afd MS |
86 | typedef struct page *pgtable_t; |
87 | ||
1da177e4 LT |
88 | #define pgd_val(x) ((x).pgd) |
89 | #define pgprot_val(x) ((x).pgprot) | |
90 | ||
91 | #define __pte(x) ((pte_t) { (x) } ) | |
92 | #define __pgd(x) ((pgd_t) { (x) } ) | |
93 | #define __pgprot(x) ((pgprot_t) { (x) } ) | |
94 | ||
1da177e4 LT |
95 | extern unsigned long uml_physmem; |
96 | ||
97 | #define PAGE_OFFSET (uml_physmem) | |
98 | #define KERNELBASE PAGE_OFFSET | |
99 | ||
100 | #define __va_space (8*1024*1024) | |
101 | ||
d99c4022 | 102 | #include "mem.h" |
b9e0d069 JD |
103 | |
104 | /* Cast to unsigned long before casting to void * to avoid a warning from | |
105 | * mmap_kmem about cutting a long long down to a void *. Not sure that | |
106 | * casting is the right thing, but 32-bit UML can't have 64-bit virtual | |
107 | * addresses | |
108 | */ | |
75cd968a LT |
109 | #define __pa(virt) to_phys((void *) (unsigned long) (virt)) |
110 | #define __va(phys) to_virt((unsigned long) (phys)) | |
1da177e4 | 111 | |
655e4ed0 JD |
112 | #define phys_to_pfn(p) ((pfn_t) ((p) >> PAGE_SHIFT)) |
113 | #define pfn_to_phys(pfn) ((phys_t) ((pfn) << PAGE_SHIFT)) | |
1da177e4 LT |
114 | |
115 | #define pfn_valid(pfn) ((pfn) < max_mapnr) | |
116 | #define virt_addr_valid(v) pfn_valid(phys_to_pfn(__pa(v))) | |
117 | ||
9828c185 | 118 | #include <asm-generic/memory_model.h> |
fd4fd5aa SR |
119 | #include <asm-generic/page.h> |
120 | ||
a7dfa940 CG |
121 | #endif /* __ASSEMBLY__ */ |
122 | #endif /* __UM_PAGE_H */ |