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