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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 | ||
10 | struct page; | |
11 | ||
12 | #include <linux/config.h> | |
13 | #include <asm/vm-flags.h> | |
14 | ||
15 | /* PAGE_SHIFT determines the page size */ | |
16 | #define PAGE_SHIFT 12 | |
17 | #define PAGE_SIZE (1UL << PAGE_SHIFT) | |
18 | #define PAGE_MASK (~(PAGE_SIZE-1)) | |
19 | ||
20 | /* | |
21 | * These are used to make use of C type-checking.. | |
22 | */ | |
23 | ||
24 | #define clear_page(page) memset((void *)(page), 0, PAGE_SIZE) | |
25 | #define copy_page(to,from) memcpy((void *)(to), (void *)(from), PAGE_SIZE) | |
26 | ||
27 | #define clear_user_page(page, vaddr, pg) clear_page(page) | |
28 | #define copy_user_page(to, from, vaddr, pg) copy_page(to, from) | |
29 | ||
c45166be | 30 | #if defined(CONFIG_3_LEVEL_PGTABLES) && !defined(CONFIG_64BIT) |
1da177e4 LT |
31 | |
32 | typedef struct { unsigned long pte_low, pte_high; } pte_t; | |
33 | typedef struct { unsigned long long pmd; } pmd_t; | |
34 | typedef struct { unsigned long pgd; } pgd_t; | |
35 | #define pte_val(x) ((x).pte_low | ((unsigned long long) (x).pte_high << 32)) | |
36 | ||
37 | #define pte_get_bits(pte, bits) ((pte).pte_low & (bits)) | |
38 | #define pte_set_bits(pte, bits) ((pte).pte_low |= (bits)) | |
39 | #define pte_clear_bits(pte, bits) ((pte).pte_low &= ~(bits)) | |
40 | #define pte_copy(to, from) ({ (to).pte_high = (from).pte_high; \ | |
41 | smp_wmb(); \ | |
42 | (to).pte_low = (from).pte_low; }) | |
43 | #define pte_is_zero(pte) (!((pte).pte_low & ~_PAGE_NEWPAGE) && !(pte).pte_high) | |
44 | #define pte_set_val(pte, phys, prot) \ | |
45 | ({ (pte).pte_high = (phys) >> 32; \ | |
46 | (pte).pte_low = (phys) | pgprot_val(prot); }) | |
47 | ||
f7fe8781 PBG |
48 | #define pmd_val(x) ((x).pmd) |
49 | #define __pmd(x) ((pmd_t) { (x) } ) | |
50 | ||
1da177e4 LT |
51 | typedef unsigned long long pfn_t; |
52 | typedef unsigned long long phys_t; | |
53 | ||
54 | #else | |
55 | ||
56 | typedef struct { unsigned long pte; } pte_t; | |
57 | typedef struct { unsigned long pgd; } pgd_t; | |
58 | ||
59 | #ifdef CONFIG_3_LEVEL_PGTABLES | |
60 | typedef struct { unsigned long pmd; } pmd_t; | |
61 | #define pmd_val(x) ((x).pmd) | |
62 | #define __pmd(x) ((pmd_t) { (x) } ) | |
63 | #endif | |
64 | ||
65 | #define pte_val(x) ((x).pte) | |
66 | ||
67 | ||
68 | #define pte_get_bits(p, bits) ((p).pte & (bits)) | |
69 | #define pte_set_bits(p, bits) ((p).pte |= (bits)) | |
70 | #define pte_clear_bits(p, bits) ((p).pte &= ~(bits)) | |
71 | #define pte_copy(to, from) ((to).pte = (from).pte) | |
72 | #define pte_is_zero(p) (!((p).pte & ~_PAGE_NEWPAGE)) | |
73 | #define pte_set_val(p, phys, prot) (p).pte = (phys | pgprot_val(prot)) | |
74 | ||
75 | typedef unsigned long pfn_t; | |
76 | typedef unsigned long phys_t; | |
77 | ||
78 | #endif | |
79 | ||
80 | typedef struct { unsigned long pgprot; } pgprot_t; | |
81 | ||
82 | #define pgd_val(x) ((x).pgd) | |
83 | #define pgprot_val(x) ((x).pgprot) | |
84 | ||
85 | #define __pte(x) ((pte_t) { (x) } ) | |
86 | #define __pgd(x) ((pgd_t) { (x) } ) | |
87 | #define __pgprot(x) ((pgprot_t) { (x) } ) | |
88 | ||
89 | /* to align the pointer to the (next) page boundary */ | |
90 | #define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK) | |
91 | ||
92 | extern unsigned long uml_physmem; | |
93 | ||
94 | #define PAGE_OFFSET (uml_physmem) | |
95 | #define KERNELBASE PAGE_OFFSET | |
96 | ||
97 | #define __va_space (8*1024*1024) | |
98 | ||
d99c4022 | 99 | #include "mem.h" |
b9e0d069 JD |
100 | |
101 | /* Cast to unsigned long before casting to void * to avoid a warning from | |
102 | * mmap_kmem about cutting a long long down to a void *. Not sure that | |
103 | * casting is the right thing, but 32-bit UML can't have 64-bit virtual | |
104 | * addresses | |
105 | */ | |
75cd968a LT |
106 | #define __pa(virt) to_phys((void *) (unsigned long) (virt)) |
107 | #define __va(phys) to_virt((unsigned long) (phys)) | |
1da177e4 LT |
108 | |
109 | #define page_to_pfn(page) ((page) - mem_map) | |
110 | #define pfn_to_page(pfn) (mem_map + (pfn)) | |
111 | ||
112 | #define phys_to_pfn(p) ((p) >> PAGE_SHIFT) | |
113 | #define pfn_to_phys(pfn) ((pfn) << PAGE_SHIFT) | |
114 | ||
115 | #define pfn_valid(pfn) ((pfn) < max_mapnr) | |
116 | #define virt_addr_valid(v) pfn_valid(phys_to_pfn(__pa(v))) | |
117 | ||
53f9fc93 | 118 | extern struct page *arch_validate(struct page *page, gfp_t mask, int order); |
1da177e4 LT |
119 | #define HAVE_ARCH_VALIDATE |
120 | ||
121 | extern void arch_free_page(struct page *page, int order); | |
122 | #define HAVE_ARCH_FREE_PAGE | |
123 | ||
fd4fd5aa SR |
124 | #include <asm-generic/page.h> |
125 | ||
1da177e4 | 126 | #endif |