1 | /* |
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2 | * page.c - physical page related operations implementation |
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3 | * |
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4 | * Authors Ghassan Almaless (2008,2009,2010,2011,2012) |
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5 | * Alain Greiner (2016,2017) |
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6 | * |
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7 | * Copyright (c) UPMC Sorbonne Universites |
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8 | * |
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9 | * This file is part of ALMOS-MKH. |
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10 | * |
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11 | * ALMOS-MKH is free software; you can redistribute it and/or modify it |
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12 | * under the terms of the GNU General Public License as published by |
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13 | * the Free Software Foundation; version 2.0 of the License. |
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14 | * |
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15 | * ALMOS-MKH is distributed in the hope that it will be useful, but |
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16 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
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17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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18 | * General Public License for more details. |
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19 | * |
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20 | * You should have received a copy of the GNU General Public License |
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21 | * along with ALMOS-MKH; if not, write to the Free Software Foundation, |
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22 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
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23 | */ |
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24 | |
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25 | #include <hal_kernel_types.h> |
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26 | #include <hal_special.h> |
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27 | #include <hal_atomic.h> |
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28 | #include <list.h> |
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29 | #include <queuelock.h> |
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30 | #include <memcpy.h> |
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31 | #include <printk.h> |
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32 | #include <vfs.h> |
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33 | #include <process.h> |
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34 | #include <page.h> |
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35 | |
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36 | |
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37 | //////////////////////////////////////// |
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38 | inline void page_init( page_t * page ) |
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39 | { |
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40 | page->flags = 0; |
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41 | page->order = 0; |
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42 | page->mapper = NULL; |
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43 | page->index = 0; |
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44 | page->refcount = 0; |
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45 | page->forks = 0; |
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46 | |
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47 | remote_busylock_init( XPTR( local_cxy , &page->lock ), LOCK_PAGE_STATE ); |
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48 | |
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49 | list_entry_init( &page->list ); |
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50 | } |
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51 | |
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52 | //////////////////////////////////////////// |
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53 | inline void page_set_flag( page_t * page, |
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54 | uint32_t value ) |
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55 | { |
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56 | hal_atomic_or( (uint32_t *)&page->flags , (uint32_t)value ); |
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57 | } |
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58 | |
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59 | ////////////////////////////////////////////// |
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60 | inline void page_clear_flag( page_t * page, |
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61 | uint32_t value ) |
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62 | { |
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63 | hal_atomic_and( (uint32_t *)&page->flags , ~((uint32_t)value) ); |
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64 | } |
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65 | |
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66 | ////////////////////////////////////////////// |
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67 | inline bool_t page_is_flag( page_t * page, |
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68 | uint32_t value ) |
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69 | { |
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70 | return ( (page->flags & value) ? 1 : 0 ); |
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71 | } |
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72 | |
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73 | //////////////////////////////////////////// |
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74 | inline void page_refcount_up( page_t *page ) |
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75 | { |
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76 | hal_atomic_add( &page->refcount , +1 ); |
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77 | } |
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78 | |
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79 | ////////////////////////////////////////////// |
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80 | inline void page_refcount_down( page_t *page ) |
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81 | { |
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82 | hal_atomic_add( &page->refcount , -1 ); |
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83 | } |
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84 | |
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85 | /////////////////////////////// |
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86 | void page_zero( page_t * page ) |
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87 | { |
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88 | uint32_t size = (1 << page->order) * CONFIG_PPM_PAGE_SIZE; |
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89 | |
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90 | xptr_t base_xp = ppm_page2base( XPTR( local_cxy , page ) ); |
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91 | |
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92 | memset( GET_PTR( base_xp ) , 0 , size ); |
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93 | } |
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94 | |
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95 | |
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96 | //////////////////////////////////////////////////// |
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97 | inline void page_remote_set_flag( xptr_t page_xp, |
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98 | uint32_t value ) |
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99 | { |
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100 | cxy_t page_cxy = GET_CXY( page_xp ); |
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101 | page_t * page_ptr = GET_PTR( page_xp ); |
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102 | |
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103 | hal_remote_atomic_or( XPTR( page_cxy , &page_ptr->flags ) , value ); |
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104 | } |
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105 | |
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106 | ////////////////////////////////////////////////////// |
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107 | inline void page_remote_clear_flag( xptr_t page_xp, |
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108 | uint32_t value ) |
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109 | { |
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110 | cxy_t page_cxy = GET_CXY( page_xp ); |
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111 | page_t * page_ptr = GET_PTR( page_xp ); |
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112 | |
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113 | hal_remote_atomic_and( XPTR( page_cxy , &page_ptr->flags ) , value ); |
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114 | } |
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115 | |
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116 | ///////////////////////////////////////////////////// |
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117 | inline bool_t page_remote_is_flag( xptr_t page_xp, |
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118 | uint32_t value ) |
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119 | { |
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120 | cxy_t page_cxy = GET_CXY( page_xp ); |
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121 | page_t * page_ptr = GET_PTR( page_xp ); |
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122 | |
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123 | uint32_t flags = hal_remote_l32( XPTR( page_cxy , &page_ptr->flags ) ); |
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124 | |
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125 | return (flags & value) ? 1 : 0; |
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126 | } |
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127 | |
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128 | ///////////////////////////////////////////////////// |
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129 | inline void page_remote_refcount_up( xptr_t page_xp ) |
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130 | { |
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131 | cxy_t page_cxy = GET_CXY( page_xp ); |
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132 | page_t * page_ptr = GET_PTR( page_xp ); |
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133 | |
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134 | hal_remote_atomic_add( XPTR( page_cxy , &page_ptr->refcount ) , 1 ); |
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135 | } |
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136 | |
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137 | /////////////////////////////////////////////////////// |
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138 | inline void page_remote_refcount_down( xptr_t page_xp ) |
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139 | { |
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140 | cxy_t page_cxy = GET_CXY( page_xp ); |
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141 | page_t * page_ptr = GET_PTR( page_xp ); |
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142 | |
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143 | hal_remote_atomic_add( XPTR( page_cxy , &page_ptr->refcount ) , -1 ); |
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144 | } |
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145 | |
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146 | /////////////////////////////////////////// |
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147 | void page_remote_display( xptr_t page_xp ) |
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148 | { |
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149 | page_t page; // local copy of page decriptor |
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150 | |
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151 | hal_remote_memcpy( XPTR( local_cxy , &page ) , page_xp , sizeof( page_t ) ); |
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152 | |
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153 | printk("*** Page %d in cluster %x : ppn %x / flags %x / order %d / refcount %d\n", |
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154 | page.index, |
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155 | GET_CXY( page_xp ), |
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156 | ppm_page2ppn( page_xp ), |
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157 | page.flags, |
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158 | page.order, |
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159 | page.refcount ); |
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160 | } |
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161 | |
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162 | |
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163 | |
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