1 | #ifndef _ASM_IA64_PGALLOC_H |
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2 | #define _ASM_IA64_PGALLOC_H |
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3 | |
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4 | /* |
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5 | * This file contains the functions and defines necessary to allocate |
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6 | * page tables. |
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7 | * |
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8 | * This hopefully works with any (fixed) ia-64 page-size, as defined |
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9 | * in <asm/page.h> (currently 8192). |
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10 | * |
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11 | * Copyright (C) 1998-2001 Hewlett-Packard Co |
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12 | * David Mosberger-Tang <davidm@hpl.hp.com> |
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13 | * Copyright (C) 2000, Goutham Rao <goutham.rao@intel.com> |
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14 | */ |
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15 | |
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16 | |
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17 | #include <linux/compiler.h> |
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18 | #include <linux/mm.h> |
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19 | #include <linux/page-flags.h> |
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20 | #include <linux/threads.h> |
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21 | |
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22 | #include <asm/mmu_context.h> |
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23 | |
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24 | DECLARE_PER_CPU(unsigned long *, __pgtable_quicklist); |
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25 | #define pgtable_quicklist __ia64_per_cpu_var(__pgtable_quicklist) |
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26 | DECLARE_PER_CPU(long, __pgtable_quicklist_size); |
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27 | #define pgtable_quicklist_size __ia64_per_cpu_var(__pgtable_quicklist_size) |
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28 | |
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29 | static inline long pgtable_quicklist_total_size(void) |
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30 | { |
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31 | long ql_size = 0; |
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32 | int cpuid; |
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33 | |
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34 | for_each_online_cpu(cpuid) { |
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35 | ql_size += per_cpu(__pgtable_quicklist_size, cpuid); |
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36 | } |
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37 | return ql_size; |
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38 | } |
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39 | |
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40 | static inline void *pgtable_quicklist_alloc(void) |
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41 | { |
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42 | unsigned long *ret = NULL; |
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43 | |
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44 | preempt_disable(); |
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45 | |
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46 | ret = pgtable_quicklist; |
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47 | if (likely(ret != NULL)) { |
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48 | pgtable_quicklist = (unsigned long *)(*ret); |
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49 | ret[0] = 0; |
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50 | --pgtable_quicklist_size; |
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51 | preempt_enable(); |
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52 | } else { |
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53 | preempt_enable(); |
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54 | ret = (unsigned long *)__get_free_page(GFP_KERNEL | __GFP_ZERO); |
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55 | } |
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56 | |
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57 | return ret; |
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58 | } |
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59 | |
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60 | static inline void pgtable_quicklist_free(void *pgtable_entry) |
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61 | { |
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62 | #ifdef CONFIG_NUMA |
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63 | unsigned long nid = page_to_nid(virt_to_page(pgtable_entry)); |
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64 | |
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65 | if (unlikely(nid != numa_node_id())) { |
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66 | free_page((unsigned long)pgtable_entry); |
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67 | return; |
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68 | } |
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69 | #endif |
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70 | |
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71 | preempt_disable(); |
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72 | *(unsigned long *)pgtable_entry = (unsigned long)pgtable_quicklist; |
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73 | pgtable_quicklist = (unsigned long *)pgtable_entry; |
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74 | ++pgtable_quicklist_size; |
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75 | preempt_enable(); |
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76 | } |
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77 | |
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78 | static inline pgd_t *pgd_alloc(struct mm_struct *mm) |
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79 | { |
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80 | return pgtable_quicklist_alloc(); |
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81 | } |
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82 | |
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83 | static inline void pgd_free(pgd_t * pgd) |
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84 | { |
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85 | pgtable_quicklist_free(pgd); |
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86 | } |
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87 | |
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88 | #ifdef CONFIG_PGTABLE_4 |
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89 | static inline void |
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90 | pgd_populate(struct mm_struct *mm, pgd_t * pgd_entry, pud_t * pud) |
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91 | { |
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92 | pgd_val(*pgd_entry) = __pa(pud); |
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93 | } |
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94 | |
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95 | static inline pud_t *pud_alloc_one(struct mm_struct *mm, unsigned long addr) |
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96 | { |
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97 | return pgtable_quicklist_alloc(); |
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98 | } |
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99 | |
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100 | static inline void pud_free(pud_t * pud) |
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101 | { |
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102 | pgtable_quicklist_free(pud); |
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103 | } |
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104 | #define __pud_free_tlb(tlb, pud) pud_free(pud) |
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105 | #endif /* CONFIG_PGTABLE_4 */ |
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106 | |
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107 | static inline void |
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108 | pud_populate(struct mm_struct *mm, pud_t * pud_entry, pmd_t * pmd) |
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109 | { |
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110 | pud_val(*pud_entry) = __pa(pmd); |
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111 | } |
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112 | |
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113 | static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long addr) |
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114 | { |
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115 | return pgtable_quicklist_alloc(); |
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116 | } |
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117 | |
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118 | static inline void pmd_free(pmd_t * pmd) |
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119 | { |
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120 | pgtable_quicklist_free(pmd); |
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121 | } |
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122 | |
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123 | #define __pmd_free_tlb(tlb, pmd) pmd_free(pmd) |
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124 | |
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125 | static inline void |
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126 | pmd_populate(struct mm_struct *mm, pmd_t * pmd_entry, struct page *pte) |
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127 | { |
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128 | #ifndef CONFIG_XEN |
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129 | pmd_val(*pmd_entry) = page_to_phys(pte); |
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130 | #else |
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131 | pmd_val(*pmd_entry) = page_to_pseudophys(pte); |
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132 | #endif |
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133 | } |
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134 | |
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135 | static inline void |
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136 | pmd_populate_kernel(struct mm_struct *mm, pmd_t * pmd_entry, pte_t * pte) |
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137 | { |
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138 | pmd_val(*pmd_entry) = __pa(pte); |
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139 | } |
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140 | |
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141 | static inline struct page *pte_alloc_one(struct mm_struct *mm, |
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142 | unsigned long addr) |
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143 | { |
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144 | return virt_to_page(pgtable_quicklist_alloc()); |
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145 | } |
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146 | |
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147 | static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm, |
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148 | unsigned long addr) |
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149 | { |
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150 | return pgtable_quicklist_alloc(); |
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151 | } |
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152 | |
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153 | static inline void pte_free(struct page *pte) |
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154 | { |
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155 | pgtable_quicklist_free(page_address(pte)); |
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156 | } |
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157 | |
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158 | static inline void pte_free_kernel(pte_t * pte) |
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159 | { |
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160 | pgtable_quicklist_free(pte); |
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161 | } |
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162 | |
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163 | #define __pte_free_tlb(tlb, pte) pte_free(pte) |
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164 | |
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165 | extern void check_pgt_cache(void); |
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166 | |
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167 | #endif /* _ASM_IA64_PGALLOC_H */ |
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