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annotate rathaxes_samples_e1000_add_a_dma_abstraction.patch @ 115:5a663f8f0e54

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WIP, fix another small bug in rathaxes sequence calls
author Louis Opter <louis@lse.epita.fr>
date Mon, 22 Jul 2013 13:52:00 -0700
parents bfe10def90e3
children f3c7e9b0c5cf
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 # HG changeset patch
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2 # Parent af7a1f8589d632497e2f2574570f5153cae59b91
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3 e1000: start a DMA allocation/mapping abstraction
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4
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5 It currently matches a lot the Linux DMA API but it should be usable by
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6 other OSes too. The Linux DMA API is described at the end of the chapter
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7 15 in the LDD3.
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8
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9 This will be useful to remove Linux specific DMA code from
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10 e1000::set_up_device which should be only device independent code.
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11
112
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12 diff --git a/rathaxes/samples/e1000/CMakeLists.txt b/rathaxes/samples/e1000/CMakeLists.txt
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13 --- a/rathaxes/samples/e1000/CMakeLists.txt
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14 +++ b/rathaxes/samples/e1000/CMakeLists.txt
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15 @@ -5,6 +5,7 @@
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16 log.rti
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17 lkm.rti
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18 device.rti
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19 + dma.rti
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20 pci.rti
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21 socket.rti
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22 ethernet.rti
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23 @@ -12,8 +13,9 @@
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24 BLT
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25 log.blt
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26 lkm.blt
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27 + device.blt
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28 + dma.blt
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29 pci.blt
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30 - device.blt
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31 socket.blt
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32 e1000.blt
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33 ethernet.blt)
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34 diff --git a/rathaxes/samples/e1000/dma.blt b/rathaxes/samples/e1000/dma.blt
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35 new file mode 100644
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36 --- /dev/null
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37 +++ b/rathaxes/samples/e1000/dma.blt
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38 @@ -0,0 +1,89 @@
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39 +with DMA, Builtin, LKM, Device
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40 +{
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41 + template type DMA::AbstractDMAHandle()
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42 + {
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43 + chunk LKM::includes()
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44 + {
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45 + #include <linux/dma-mapping.h>
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46 + }
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47 +
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48 + decl data_types()
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49 + {
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50 + dma_addr_t data;
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51 + }
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52 +
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53 + map
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54 + {
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55 + k_dma_handle: ((dma_addr_t)${self});
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56 + }
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57 + }
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58 +
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59 + template type DMA::AbstractDMADirection()
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60 + {
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61 + decl data_types()
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62 + {
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63 + enum dma_data_direction data;
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64 + }
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65 +
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66 + map
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67 + {
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68 + k_dma_direction: ((enum dma_data_direction)${self});
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69 + }
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70 + }
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71 +
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72 + template type DMA::DMADirection()
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73 + {
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74 + decl data_types()
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75 + {
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76 + RTX_DMA_BIDIRECTIONAL = DMA_BIDIRECTIONAL,
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77 + RTX_DMA_TO_DEVICE = DMA_TO_DEVICE,
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78 + RTX_DMA_FROM_DEVICE = DMA_FROM_DEVICE
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79 + }
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80 +
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81 + map
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82 + {
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83 + /* XXX: we should use ${DMA::AbstractDMADirection} here: */
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84 + dma_direction: ((enum dma_data_direction)${self});
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85 + }
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86 + }
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87 +
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88 + template sequence map(Device::AbstractDevice dev, Builtin::symbol buf, Builtin::number size, DMA::DMADirection dir)
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89 + {
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90 + chunk ::CALL()
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91 + {
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92 + ((${DMA::DMA::AbstractDMAHandle})dma_map_single(${dev.k_device}, ${buf}, ${size}, ${dir.dma_direction}));
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93 + }
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94 + }
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95 +
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96 + template sequence unmap(Device::AbstractDevice dev, DMA::AbstractDMAHandle handle, Builtin::number size, DMA::DMADirection dir)
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97 + {
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98 + chunk ::CALL()
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99 + {
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100 + dma_unmap_single(${dev.k_device}, ${handle.k_dma_handle}, ${size}, ${dir.dma_direction});
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101 + }
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102 + }
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103 +
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104 + template sequence mapping_error(Device::AbstractDevice dev, DMA::AbstractDMAHandle handle)
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105 + {
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106 + chunk ::CALL()
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107 + {
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108 + dma_mapping_error(${dev.k_device}, ${handle.k_dma_handle});
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109 + }
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110 + }
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111 +
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112 + template sequence alloc_coherent(Device::AbstractDevice dev, Builtin::number size, DMA::AbstractDMAHandle handle)
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113 + {
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114 + chunk ::CALL()
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115 + {
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116 + dma_alloc_coherent(${dev.k_device}, ${size}, &${handle.k_dma_handle}, GFP_KERNEL);
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117 + }
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118 + }
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119 +
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120 + template sequence free_coherent(Device::AbstractDevice dev, Builtin::number size, Builtin::symbol addr, DMA::AbstractDMAHandle handle)
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121 + {
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122 + chunk ::CALL()
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123 + {
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124 + dma_free_coherent(${dev.k_device}, ${size}, ${addr}, ${handle.k_dma_handle});
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125 + }
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126 + }
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127 +}
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128 diff --git a/rathaxes/samples/e1000/dma.rti b/rathaxes/samples/e1000/dma.rti
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129 new file mode 100644
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130 --- /dev/null
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131 +++ b/rathaxes/samples/e1000/dma.rti
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132 @@ -0,0 +1,48 @@
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133 +interface DMA : Builtin, LKM, Device
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134 +{
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135 + provided type AbstractDMAHandle
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136 + {
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137 + chunk LKM::includes();
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138 + decl data_types();
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139 + attribute Builtin::symbol.scalar k_dma_handle;
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140 + }
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141 +
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142 + provided type AbstractDMADirection
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143 + {
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144 + decl data_types();
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145 + attribute Builtin::symbol.scalar k_dma_direction;
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146 + }
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147 +
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148 + provided type DMADirection
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149 + {
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150 + decl data_types();
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151 + attribute AbstractDMADirection.scalar dma_direction;
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152 + }
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153 +
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154 + provided sequence map(Device::AbstractDevice, Builtin::symbol, Builtin::number, DMADirection)
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155 + {
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156 + provided chunk ::CALL(); /* -> DMAHandle */
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157 + }
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158 +
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159 + provided sequence unmap(Device::AbstractDevice, AbstractDMAHandle, Builtin::number, DMADirection)
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160 + {
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161 + provided chunk ::CALL();
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162 + }
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163 +
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164 + /* XXX: Until we have a real error handling mechanism: */
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165 + provided sequence mapping_error(Device::AbstractDevice, AbstractDMAHandle)
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166 + {
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167 + provided chunk ::CALL(); /* -> != 0 if the mapping failed */
5a663f8f0e54 WIP, fix another small bug in rathaxes sequence calls
Louis Opter <louis@lse.epita.fr>
parents: 112
diff changeset
168 + }
5a663f8f0e54 WIP, fix another small bug in rathaxes sequence calls
Louis Opter <louis@lse.epita.fr>
parents: 112
diff changeset
169 +
112
Louis Opter <louis@lse.epita.fr>
parents: 111
diff changeset
170 + provided sequence alloc_coherent(Device::AbstractDevice, Builtin::number, AbstractDMAHandle)
111
b072f682823d Start a new series to refactor e1000::set_up_device
Louis Opter <louis@lse.epita.fr>
parents:
diff changeset
171 + {
112
Louis Opter <louis@lse.epita.fr>
parents: 111
diff changeset
172 + /* return the addr and the handle via the AbstractDMAHandle ptr: */
Louis Opter <louis@lse.epita.fr>
parents: 111
diff changeset
173 + provided chunk ::CALL();
111
b072f682823d Start a new series to refactor e1000::set_up_device
Louis Opter <louis@lse.epita.fr>
parents:
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174 + }
b072f682823d Start a new series to refactor e1000::set_up_device
Louis Opter <louis@lse.epita.fr>
parents:
diff changeset
175 +
b072f682823d Start a new series to refactor e1000::set_up_device
Louis Opter <louis@lse.epita.fr>
parents:
diff changeset
176 + provided sequence free_coherent(Device::AbstractDevice, Builtin::number, Builtin::symbol, AbstractDMAHandle)
b072f682823d Start a new series to refactor e1000::set_up_device
Louis Opter <louis@lse.epita.fr>
parents:
diff changeset
177 + {
b072f682823d Start a new series to refactor e1000::set_up_device
Louis Opter <louis@lse.epita.fr>
parents:
diff changeset
178 + provided chunk ::CALL();
b072f682823d Start a new series to refactor e1000::set_up_device
Louis Opter <louis@lse.epita.fr>
parents:
diff changeset
179 + }
b072f682823d Start a new series to refactor e1000::set_up_device
Louis Opter <louis@lse.epita.fr>
parents:
diff changeset
180 +}