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6595 | serge | 1 | /******************************************************************************* |
2 | * |
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3 | * Module Name: rsutils - Utilities for the resource manager |
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4 | * |
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5 | ******************************************************************************/ |
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6 | |||
7 | /* |
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8 | * Copyright (C) 2000 - 2015, Intel Corp. |
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9 | * All rights reserved. |
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10 | * |
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11 | * Redistribution and use in source and binary forms, with or without |
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12 | * modification, are permitted provided that the following conditions |
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13 | * are met: |
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14 | * 1. Redistributions of source code must retain the above copyright |
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15 | * notice, this list of conditions, and the following disclaimer, |
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16 | * without modification. |
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17 | * 2. Redistributions in binary form must reproduce at minimum a disclaimer |
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18 | * substantially similar to the "NO WARRANTY" disclaimer below |
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19 | * ("Disclaimer") and any redistribution must be conditioned upon |
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20 | * including a substantially similar Disclaimer requirement for further |
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21 | * binary redistribution. |
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22 | * 3. Neither the names of the above-listed copyright holders nor the names |
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23 | * of any contributors may be used to endorse or promote products derived |
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24 | * from this software without specific prior written permission. |
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25 | * |
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26 | * Alternatively, this software may be distributed under the terms of the |
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27 | * GNU General Public License ("GPL") version 2 as published by the Free |
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28 | * Software Foundation. |
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29 | * |
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30 | * NO WARRANTY |
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31 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
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32 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
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33 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR |
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34 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
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35 | * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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36 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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37 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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38 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
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39 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING |
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40 | * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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41 | * POSSIBILITY OF SUCH DAMAGES. |
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42 | */ |
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43 | |||
44 | #include |
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45 | #include "accommon.h" |
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46 | #include "acnamesp.h" |
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47 | #include "acresrc.h" |
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48 | |||
49 | #define _COMPONENT ACPI_RESOURCES |
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50 | ACPI_MODULE_NAME("rsutils") |
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51 | |||
52 | /******************************************************************************* |
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53 | * |
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54 | * FUNCTION: acpi_rs_decode_bitmask |
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55 | * |
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56 | * PARAMETERS: mask - Bitmask to decode |
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57 | * list - Where the converted list is returned |
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58 | * |
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59 | * RETURN: Count of bits set (length of list) |
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60 | * |
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61 | * DESCRIPTION: Convert a bit mask into a list of values |
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62 | * |
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63 | ******************************************************************************/ |
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64 | u8 acpi_rs_decode_bitmask(u16 mask, u8 * list) |
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65 | { |
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66 | u8 i; |
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67 | u8 bit_count; |
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68 | |||
69 | ACPI_FUNCTION_ENTRY(); |
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70 | |||
71 | /* Decode the mask bits */ |
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72 | |||
73 | for (i = 0, bit_count = 0; mask; i++) { |
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74 | if (mask & 0x0001) { |
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75 | list[bit_count] = i; |
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76 | bit_count++; |
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77 | } |
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78 | |||
79 | mask >>= 1; |
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80 | } |
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81 | |||
82 | return (bit_count); |
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83 | } |
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84 | |||
85 | /******************************************************************************* |
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86 | * |
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87 | * FUNCTION: acpi_rs_encode_bitmask |
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88 | * |
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89 | * PARAMETERS: list - List of values to encode |
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90 | * count - Length of list |
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91 | * |
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92 | * RETURN: Encoded bitmask |
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93 | * |
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94 | * DESCRIPTION: Convert a list of values to an encoded bitmask |
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95 | * |
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96 | ******************************************************************************/ |
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97 | |||
98 | u16 acpi_rs_encode_bitmask(u8 * list, u8 count) |
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99 | { |
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100 | u32 i; |
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101 | u16 mask; |
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102 | |||
103 | ACPI_FUNCTION_ENTRY(); |
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104 | |||
105 | /* Encode the list into a single bitmask */ |
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106 | |||
107 | for (i = 0, mask = 0; i < count; i++) { |
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108 | mask |= (0x1 << list[i]); |
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109 | } |
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110 | |||
111 | return (mask); |
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112 | } |
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113 | |||
114 | /******************************************************************************* |
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115 | * |
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116 | * FUNCTION: acpi_rs_move_data |
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117 | * |
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118 | * PARAMETERS: destination - Pointer to the destination descriptor |
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119 | * source - Pointer to the source descriptor |
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120 | * item_count - How many items to move |
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121 | * move_type - Byte width |
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122 | * |
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123 | * RETURN: None |
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124 | * |
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125 | * DESCRIPTION: Move multiple data items from one descriptor to another. Handles |
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126 | * alignment issues and endian issues if necessary, as configured |
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127 | * via the ACPI_MOVE_* macros. (This is why a memcpy is not used) |
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128 | * |
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129 | ******************************************************************************/ |
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130 | |||
131 | void |
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132 | acpi_rs_move_data(void *destination, void *source, u16 item_count, u8 move_type) |
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133 | { |
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134 | u32 i; |
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135 | |||
136 | ACPI_FUNCTION_ENTRY(); |
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137 | |||
138 | /* One move per item */ |
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139 | |||
140 | for (i = 0; i < item_count; i++) { |
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141 | switch (move_type) { |
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142 | /* |
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143 | * For the 8-bit case, we can perform the move all at once |
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144 | * since there are no alignment or endian issues |
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145 | */ |
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146 | case ACPI_RSC_MOVE8: |
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147 | case ACPI_RSC_MOVE_GPIO_RES: |
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148 | case ACPI_RSC_MOVE_SERIAL_VEN: |
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149 | case ACPI_RSC_MOVE_SERIAL_RES: |
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150 | |||
151 | memcpy(destination, source, item_count); |
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152 | return; |
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153 | |||
154 | /* |
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155 | * 16-, 32-, and 64-bit cases must use the move macros that perform |
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156 | * endian conversion and/or accommodate hardware that cannot perform |
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157 | * misaligned memory transfers |
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158 | */ |
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159 | case ACPI_RSC_MOVE16: |
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160 | case ACPI_RSC_MOVE_GPIO_PIN: |
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161 | |||
162 | ACPI_MOVE_16_TO_16(&ACPI_CAST_PTR(u16, destination)[i], |
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163 | &ACPI_CAST_PTR(u16, source)[i]); |
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164 | break; |
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165 | |||
166 | case ACPI_RSC_MOVE32: |
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167 | |||
168 | ACPI_MOVE_32_TO_32(&ACPI_CAST_PTR(u32, destination)[i], |
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169 | &ACPI_CAST_PTR(u32, source)[i]); |
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170 | break; |
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171 | |||
172 | case ACPI_RSC_MOVE64: |
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173 | |||
174 | ACPI_MOVE_64_TO_64(&ACPI_CAST_PTR(u64, destination)[i], |
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175 | &ACPI_CAST_PTR(u64, source)[i]); |
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176 | break; |
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177 | |||
178 | default: |
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179 | |||
180 | return; |
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181 | } |
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182 | } |
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183 | } |
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184 | |||
185 | /******************************************************************************* |
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186 | * |
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187 | * FUNCTION: acpi_rs_set_resource_length |
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188 | * |
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189 | * PARAMETERS: total_length - Length of the AML descriptor, including |
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190 | * the header and length fields. |
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191 | * aml - Pointer to the raw AML descriptor |
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192 | * |
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193 | * RETURN: None |
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194 | * |
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195 | * DESCRIPTION: Set the resource_length field of an AML |
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196 | * resource descriptor, both Large and Small descriptors are |
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197 | * supported automatically. Note: Descriptor Type field must |
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198 | * be valid. |
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199 | * |
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200 | ******************************************************************************/ |
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201 | |||
202 | void |
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203 | acpi_rs_set_resource_length(acpi_rsdesc_size total_length, |
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204 | union aml_resource *aml) |
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205 | { |
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206 | acpi_rs_length resource_length; |
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207 | |||
208 | ACPI_FUNCTION_ENTRY(); |
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209 | |||
210 | /* Length is the total descriptor length minus the header length */ |
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211 | |||
212 | resource_length = (acpi_rs_length) |
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213 | (total_length - acpi_ut_get_resource_header_length(aml)); |
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214 | |||
215 | /* Length is stored differently for large and small descriptors */ |
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216 | |||
217 | if (aml->small_header.descriptor_type & ACPI_RESOURCE_NAME_LARGE) { |
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218 | |||
219 | /* Large descriptor -- bytes 1-2 contain the 16-bit length */ |
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220 | |||
221 | ACPI_MOVE_16_TO_16(&aml->large_header.resource_length, |
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222 | &resource_length); |
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223 | } else { |
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224 | /* Small descriptor -- bits 2:0 of byte 0 contain the length */ |
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225 | |||
226 | aml->small_header.descriptor_type = (u8) |
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227 | |||
228 | /* Clear any existing length, preserving descriptor type bits */ |
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229 | ((aml->small_header. |
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230 | descriptor_type & ~ACPI_RESOURCE_NAME_SMALL_LENGTH_MASK) |
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231 | |||
232 | | resource_length); |
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233 | } |
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234 | } |
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235 | |||
236 | /******************************************************************************* |
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237 | * |
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238 | * FUNCTION: acpi_rs_set_resource_header |
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239 | * |
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240 | * PARAMETERS: descriptor_type - Byte to be inserted as the type |
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241 | * total_length - Length of the AML descriptor, including |
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242 | * the header and length fields. |
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243 | * aml - Pointer to the raw AML descriptor |
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244 | * |
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245 | * RETURN: None |
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246 | * |
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247 | * DESCRIPTION: Set the descriptor_type and resource_length fields of an AML |
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248 | * resource descriptor, both Large and Small descriptors are |
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249 | * supported automatically |
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250 | * |
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251 | ******************************************************************************/ |
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252 | |||
253 | void |
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254 | acpi_rs_set_resource_header(u8 descriptor_type, |
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255 | acpi_rsdesc_size total_length, |
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256 | union aml_resource *aml) |
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257 | { |
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258 | ACPI_FUNCTION_ENTRY(); |
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259 | |||
260 | /* Set the Resource Type */ |
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261 | |||
262 | aml->small_header.descriptor_type = descriptor_type; |
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263 | |||
264 | /* Set the Resource Length */ |
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265 | |||
266 | acpi_rs_set_resource_length(total_length, aml); |
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267 | } |
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268 | |||
269 | /******************************************************************************* |
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270 | * |
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271 | * FUNCTION: acpi_rs_strcpy |
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272 | * |
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273 | * PARAMETERS: destination - Pointer to the destination string |
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274 | * source - Pointer to the source string |
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275 | * |
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276 | * RETURN: String length, including NULL terminator |
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277 | * |
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278 | * DESCRIPTION: Local string copy that returns the string length, saving a |
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279 | * strcpy followed by a strlen. |
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280 | * |
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281 | ******************************************************************************/ |
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282 | |||
283 | static u16 acpi_rs_strcpy(char *destination, char *source) |
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284 | { |
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285 | u16 i; |
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286 | |||
287 | ACPI_FUNCTION_ENTRY(); |
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288 | |||
289 | for (i = 0; source[i]; i++) { |
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290 | destination[i] = source[i]; |
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291 | } |
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292 | |||
293 | destination[i] = 0; |
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294 | |||
295 | /* Return string length including the NULL terminator */ |
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296 | |||
297 | return ((u16) (i + 1)); |
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298 | } |
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299 | |||
300 | /******************************************************************************* |
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301 | * |
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302 | * FUNCTION: acpi_rs_get_resource_source |
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303 | * |
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304 | * PARAMETERS: resource_length - Length field of the descriptor |
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305 | * minimum_length - Minimum length of the descriptor (minus |
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306 | * any optional fields) |
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307 | * resource_source - Where the resource_source is returned |
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308 | * aml - Pointer to the raw AML descriptor |
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309 | * string_ptr - (optional) where to store the actual |
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310 | * resource_source string |
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311 | * |
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312 | * RETURN: Length of the string plus NULL terminator, rounded up to native |
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313 | * word boundary |
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314 | * |
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315 | * DESCRIPTION: Copy the optional resource_source data from a raw AML descriptor |
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316 | * to an internal resource descriptor |
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317 | * |
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318 | ******************************************************************************/ |
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319 | |||
320 | acpi_rs_length |
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321 | acpi_rs_get_resource_source(acpi_rs_length resource_length, |
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322 | acpi_rs_length minimum_length, |
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323 | struct acpi_resource_source * resource_source, |
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324 | union aml_resource * aml, char *string_ptr) |
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325 | { |
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326 | acpi_rsdesc_size total_length; |
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327 | u8 *aml_resource_source; |
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328 | |||
329 | ACPI_FUNCTION_ENTRY(); |
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330 | |||
331 | total_length = |
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332 | resource_length + sizeof(struct aml_resource_large_header); |
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333 | aml_resource_source = ACPI_ADD_PTR(u8, aml, minimum_length); |
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334 | |||
335 | /* |
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336 | * resource_source is present if the length of the descriptor is longer than |
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337 | * the minimum length. |
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338 | * |
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339 | * Note: Some resource descriptors will have an additional null, so |
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340 | * we add 1 to the minimum length. |
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341 | */ |
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342 | if (total_length > (acpi_rsdesc_size) (minimum_length + 1)) { |
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343 | |||
344 | /* Get the resource_source_index */ |
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345 | |||
346 | resource_source->index = aml_resource_source[0]; |
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347 | |||
348 | resource_source->string_ptr = string_ptr; |
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349 | if (!string_ptr) { |
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350 | /* |
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351 | * String destination pointer is not specified; Set the String |
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352 | * pointer to the end of the current resource_source structure. |
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353 | */ |
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354 | resource_source->string_ptr = |
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355 | ACPI_ADD_PTR(char, resource_source, |
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356 | sizeof(struct acpi_resource_source)); |
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357 | } |
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358 | |||
359 | /* |
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360 | * In order for the Resource length to be a multiple of the native |
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361 | * word, calculate the length of the string (+1 for NULL terminator) |
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362 | * and expand to the next word multiple. |
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363 | * |
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364 | * Zero the entire area of the buffer. |
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365 | */ |
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366 | total_length = |
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367 | (u32)strlen(ACPI_CAST_PTR(char, &aml_resource_source[1])) + |
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368 | 1; |
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369 | total_length = (u32)ACPI_ROUND_UP_TO_NATIVE_WORD(total_length); |
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370 | |||
371 | memset(resource_source->string_ptr, 0, total_length); |
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372 | |||
373 | /* Copy the resource_source string to the destination */ |
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374 | |||
375 | resource_source->string_length = |
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376 | acpi_rs_strcpy(resource_source->string_ptr, |
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377 | ACPI_CAST_PTR(char, |
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378 | &aml_resource_source[1])); |
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379 | |||
380 | return ((acpi_rs_length) total_length); |
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381 | } |
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382 | |||
383 | /* resource_source is not present */ |
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384 | |||
385 | resource_source->index = 0; |
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386 | resource_source->string_length = 0; |
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387 | resource_source->string_ptr = NULL; |
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388 | return (0); |
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389 | } |
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390 | |||
391 | /******************************************************************************* |
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392 | * |
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393 | * FUNCTION: acpi_rs_set_resource_source |
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394 | * |
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395 | * PARAMETERS: aml - Pointer to the raw AML descriptor |
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396 | * minimum_length - Minimum length of the descriptor (minus |
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397 | * any optional fields) |
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398 | * resource_source - Internal resource_source |
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399 | |||
400 | * |
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401 | * RETURN: Total length of the AML descriptor |
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402 | * |
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403 | * DESCRIPTION: Convert an optional resource_source from internal format to a |
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404 | * raw AML resource descriptor |
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405 | * |
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406 | ******************************************************************************/ |
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407 | |||
408 | acpi_rsdesc_size |
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409 | acpi_rs_set_resource_source(union aml_resource * aml, |
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410 | acpi_rs_length minimum_length, |
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411 | struct acpi_resource_source * resource_source) |
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412 | { |
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413 | u8 *aml_resource_source; |
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414 | acpi_rsdesc_size descriptor_length; |
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415 | |||
416 | ACPI_FUNCTION_ENTRY(); |
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417 | |||
418 | descriptor_length = minimum_length; |
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419 | |||
420 | /* Non-zero string length indicates presence of a resource_source */ |
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421 | |||
422 | if (resource_source->string_length) { |
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423 | |||
424 | /* Point to the end of the AML descriptor */ |
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425 | |||
426 | aml_resource_source = ACPI_ADD_PTR(u8, aml, minimum_length); |
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427 | |||
428 | /* Copy the resource_source_index */ |
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429 | |||
430 | aml_resource_source[0] = (u8) resource_source->index; |
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431 | |||
432 | /* Copy the resource_source string */ |
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433 | |||
434 | strcpy(ACPI_CAST_PTR(char, &aml_resource_source[1]), |
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435 | resource_source->string_ptr); |
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436 | |||
437 | /* |
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438 | * Add the length of the string (+ 1 for null terminator) to the |
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439 | * final descriptor length |
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440 | */ |
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441 | descriptor_length += |
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442 | ((acpi_rsdesc_size) resource_source->string_length + 1); |
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443 | } |
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444 | |||
445 | /* Return the new total length of the AML descriptor */ |
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446 | |||
447 | return (descriptor_length); |
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448 | } |
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449 | |||
450 | /******************************************************************************* |
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451 | * |
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452 | * FUNCTION: acpi_rs_get_prt_method_data |
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453 | * |
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454 | * PARAMETERS: node - Device node |
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455 | * ret_buffer - Pointer to a buffer structure for the |
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456 | * results |
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457 | * |
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458 | * RETURN: Status |
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459 | * |
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460 | * DESCRIPTION: This function is called to get the _PRT value of an object |
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461 | * contained in an object specified by the handle passed in |
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462 | * |
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463 | * If the function fails an appropriate status will be returned |
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464 | * and the contents of the callers buffer is undefined. |
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465 | * |
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466 | ******************************************************************************/ |
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467 | |||
468 | acpi_status |
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469 | acpi_rs_get_prt_method_data(struct acpi_namespace_node * node, |
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470 | struct acpi_buffer * ret_buffer) |
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471 | { |
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472 | union acpi_operand_object *obj_desc; |
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473 | acpi_status status; |
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474 | |||
475 | ACPI_FUNCTION_TRACE(rs_get_prt_method_data); |
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476 | |||
477 | /* Parameters guaranteed valid by caller */ |
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478 | |||
479 | /* Execute the method, no parameters */ |
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480 | |||
481 | status = acpi_ut_evaluate_object(node, METHOD_NAME__PRT, |
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482 | ACPI_BTYPE_PACKAGE, &obj_desc); |
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483 | if (ACPI_FAILURE(status)) { |
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484 | return_ACPI_STATUS(status); |
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485 | } |
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486 | |||
487 | /* |
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488 | * Create a resource linked list from the byte stream buffer that comes |
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489 | * back from the _CRS method execution. |
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490 | */ |
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491 | status = acpi_rs_create_pci_routing_table(obj_desc, ret_buffer); |
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492 | |||
493 | /* On exit, we must delete the object returned by evaluate_object */ |
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494 | |||
495 | acpi_ut_remove_reference(obj_desc); |
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496 | return_ACPI_STATUS(status); |
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497 | } |
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498 | |||
499 | /******************************************************************************* |
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500 | * |
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501 | * FUNCTION: acpi_rs_get_crs_method_data |
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502 | * |
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503 | * PARAMETERS: node - Device node |
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504 | * ret_buffer - Pointer to a buffer structure for the |
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505 | * results |
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506 | * |
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507 | * RETURN: Status |
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508 | * |
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509 | * DESCRIPTION: This function is called to get the _CRS value of an object |
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510 | * contained in an object specified by the handle passed in |
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511 | * |
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512 | * If the function fails an appropriate status will be returned |
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513 | * and the contents of the callers buffer is undefined. |
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514 | * |
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515 | ******************************************************************************/ |
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516 | |||
517 | acpi_status |
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518 | acpi_rs_get_crs_method_data(struct acpi_namespace_node *node, |
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519 | struct acpi_buffer *ret_buffer) |
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520 | { |
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521 | union acpi_operand_object *obj_desc; |
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522 | acpi_status status; |
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523 | |||
524 | ACPI_FUNCTION_TRACE(rs_get_crs_method_data); |
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525 | |||
526 | /* Parameters guaranteed valid by caller */ |
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527 | |||
528 | /* Execute the method, no parameters */ |
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529 | |||
530 | status = acpi_ut_evaluate_object(node, METHOD_NAME__CRS, |
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531 | ACPI_BTYPE_BUFFER, &obj_desc); |
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532 | if (ACPI_FAILURE(status)) { |
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533 | return_ACPI_STATUS(status); |
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534 | } |
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535 | |||
536 | /* |
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537 | * Make the call to create a resource linked list from the |
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538 | * byte stream buffer that comes back from the _CRS method |
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539 | * execution. |
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540 | */ |
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541 | status = acpi_rs_create_resource_list(obj_desc, ret_buffer); |
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542 | |||
543 | /* On exit, we must delete the object returned by evaluateObject */ |
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544 | |||
545 | acpi_ut_remove_reference(obj_desc); |
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546 | return_ACPI_STATUS(status); |
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547 | } |
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548 | |||
549 | /******************************************************************************* |
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550 | * |
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551 | * FUNCTION: acpi_rs_get_prs_method_data |
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552 | * |
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553 | * PARAMETERS: node - Device node |
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554 | * ret_buffer - Pointer to a buffer structure for the |
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555 | * results |
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556 | * |
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557 | * RETURN: Status |
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558 | * |
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559 | * DESCRIPTION: This function is called to get the _PRS value of an object |
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560 | * contained in an object specified by the handle passed in |
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561 | * |
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562 | * If the function fails an appropriate status will be returned |
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563 | * and the contents of the callers buffer is undefined. |
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564 | * |
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565 | ******************************************************************************/ |
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566 | |||
567 | acpi_status |
||
568 | acpi_rs_get_prs_method_data(struct acpi_namespace_node *node, |
||
569 | struct acpi_buffer *ret_buffer) |
||
570 | { |
||
571 | union acpi_operand_object *obj_desc; |
||
572 | acpi_status status; |
||
573 | |||
574 | ACPI_FUNCTION_TRACE(rs_get_prs_method_data); |
||
575 | |||
576 | /* Parameters guaranteed valid by caller */ |
||
577 | |||
578 | /* Execute the method, no parameters */ |
||
579 | |||
580 | status = acpi_ut_evaluate_object(node, METHOD_NAME__PRS, |
||
581 | ACPI_BTYPE_BUFFER, &obj_desc); |
||
582 | if (ACPI_FAILURE(status)) { |
||
583 | return_ACPI_STATUS(status); |
||
584 | } |
||
585 | |||
586 | /* |
||
587 | * Make the call to create a resource linked list from the |
||
588 | * byte stream buffer that comes back from the _CRS method |
||
589 | * execution. |
||
590 | */ |
||
591 | status = acpi_rs_create_resource_list(obj_desc, ret_buffer); |
||
592 | |||
593 | /* On exit, we must delete the object returned by evaluateObject */ |
||
594 | |||
595 | acpi_ut_remove_reference(obj_desc); |
||
596 | return_ACPI_STATUS(status); |
||
597 | } |
||
598 | |||
599 | /******************************************************************************* |
||
600 | * |
||
601 | * FUNCTION: acpi_rs_get_aei_method_data |
||
602 | * |
||
603 | * PARAMETERS: node - Device node |
||
604 | * ret_buffer - Pointer to a buffer structure for the |
||
605 | * results |
||
606 | * |
||
607 | * RETURN: Status |
||
608 | * |
||
609 | * DESCRIPTION: This function is called to get the _AEI value of an object |
||
610 | * contained in an object specified by the handle passed in |
||
611 | * |
||
612 | * If the function fails an appropriate status will be returned |
||
613 | * and the contents of the callers buffer is undefined. |
||
614 | * |
||
615 | ******************************************************************************/ |
||
616 | |||
617 | acpi_status |
||
618 | acpi_rs_get_aei_method_data(struct acpi_namespace_node *node, |
||
619 | struct acpi_buffer *ret_buffer) |
||
620 | { |
||
621 | union acpi_operand_object *obj_desc; |
||
622 | acpi_status status; |
||
623 | |||
624 | ACPI_FUNCTION_TRACE(rs_get_aei_method_data); |
||
625 | |||
626 | /* Parameters guaranteed valid by caller */ |
||
627 | |||
628 | /* Execute the method, no parameters */ |
||
629 | |||
630 | status = acpi_ut_evaluate_object(node, METHOD_NAME__AEI, |
||
631 | ACPI_BTYPE_BUFFER, &obj_desc); |
||
632 | if (ACPI_FAILURE(status)) { |
||
633 | return_ACPI_STATUS(status); |
||
634 | } |
||
635 | |||
636 | /* |
||
637 | * Make the call to create a resource linked list from the |
||
638 | * byte stream buffer that comes back from the _CRS method |
||
639 | * execution. |
||
640 | */ |
||
641 | status = acpi_rs_create_resource_list(obj_desc, ret_buffer); |
||
642 | |||
643 | /* On exit, we must delete the object returned by evaluateObject */ |
||
644 | |||
645 | acpi_ut_remove_reference(obj_desc); |
||
646 | return_ACPI_STATUS(status); |
||
647 | } |
||
648 | |||
649 | /******************************************************************************* |
||
650 | * |
||
651 | * FUNCTION: acpi_rs_get_method_data |
||
652 | * |
||
653 | * PARAMETERS: handle - Handle to the containing object |
||
654 | * path - Path to method, relative to Handle |
||
655 | * ret_buffer - Pointer to a buffer structure for the |
||
656 | * results |
||
657 | * |
||
658 | * RETURN: Status |
||
659 | * |
||
660 | * DESCRIPTION: This function is called to get the _CRS or _PRS value of an |
||
661 | * object contained in an object specified by the handle passed in |
||
662 | * |
||
663 | * If the function fails an appropriate status will be returned |
||
664 | * and the contents of the callers buffer is undefined. |
||
665 | * |
||
666 | ******************************************************************************/ |
||
667 | |||
668 | acpi_status |
||
669 | acpi_rs_get_method_data(acpi_handle handle, |
||
670 | char *path, struct acpi_buffer *ret_buffer) |
||
671 | { |
||
672 | union acpi_operand_object *obj_desc; |
||
673 | acpi_status status; |
||
674 | |||
675 | ACPI_FUNCTION_TRACE(rs_get_method_data); |
||
676 | |||
677 | /* Parameters guaranteed valid by caller */ |
||
678 | |||
679 | /* Execute the method, no parameters */ |
||
680 | |||
681 | status = |
||
682 | acpi_ut_evaluate_object(ACPI_CAST_PTR |
||
683 | (struct acpi_namespace_node, handle), path, |
||
684 | ACPI_BTYPE_BUFFER, &obj_desc); |
||
685 | if (ACPI_FAILURE(status)) { |
||
686 | return_ACPI_STATUS(status); |
||
687 | } |
||
688 | |||
689 | /* |
||
690 | * Make the call to create a resource linked list from the |
||
691 | * byte stream buffer that comes back from the method |
||
692 | * execution. |
||
693 | */ |
||
694 | status = acpi_rs_create_resource_list(obj_desc, ret_buffer); |
||
695 | |||
696 | /* On exit, we must delete the object returned by evaluate_object */ |
||
697 | |||
698 | acpi_ut_remove_reference(obj_desc); |
||
699 | return_ACPI_STATUS(status); |
||
700 | } |
||
701 | |||
702 | /******************************************************************************* |
||
703 | * |
||
704 | * FUNCTION: acpi_rs_set_srs_method_data |
||
705 | * |
||
706 | * PARAMETERS: node - Device node |
||
707 | * in_buffer - Pointer to a buffer structure of the |
||
708 | * parameter |
||
709 | * |
||
710 | * RETURN: Status |
||
711 | * |
||
712 | * DESCRIPTION: This function is called to set the _SRS of an object contained |
||
713 | * in an object specified by the handle passed in |
||
714 | * |
||
715 | * If the function fails an appropriate status will be returned |
||
716 | * and the contents of the callers buffer is undefined. |
||
717 | * |
||
718 | * Note: Parameters guaranteed valid by caller |
||
719 | * |
||
720 | ******************************************************************************/ |
||
721 | |||
722 | acpi_status |
||
723 | acpi_rs_set_srs_method_data(struct acpi_namespace_node *node, |
||
724 | struct acpi_buffer *in_buffer) |
||
725 | { |
||
726 | struct acpi_evaluate_info *info; |
||
727 | union acpi_operand_object *args[2]; |
||
728 | acpi_status status; |
||
729 | struct acpi_buffer buffer; |
||
730 | |||
731 | ACPI_FUNCTION_TRACE(rs_set_srs_method_data); |
||
732 | |||
733 | /* Allocate and initialize the evaluation information block */ |
||
734 | |||
735 | info = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_evaluate_info)); |
||
736 | if (!info) { |
||
737 | return_ACPI_STATUS(AE_NO_MEMORY); |
||
738 | } |
||
739 | |||
740 | info->prefix_node = node; |
||
741 | info->relative_pathname = METHOD_NAME__SRS; |
||
742 | info->parameters = args; |
||
743 | info->flags = ACPI_IGNORE_RETURN_VALUE; |
||
744 | |||
745 | /* |
||
746 | * The in_buffer parameter will point to a linked list of |
||
747 | * resource parameters. It needs to be formatted into a |
||
748 | * byte stream to be sent in as an input parameter to _SRS |
||
749 | * |
||
750 | * Convert the linked list into a byte stream |
||
751 | */ |
||
752 | buffer.length = ACPI_ALLOCATE_LOCAL_BUFFER; |
||
753 | status = acpi_rs_create_aml_resources(in_buffer, &buffer); |
||
754 | if (ACPI_FAILURE(status)) { |
||
755 | goto cleanup; |
||
756 | } |
||
757 | |||
758 | /* Create and initialize the method parameter object */ |
||
759 | |||
760 | args[0] = acpi_ut_create_internal_object(ACPI_TYPE_BUFFER); |
||
761 | if (!args[0]) { |
||
762 | /* |
||
763 | * Must free the buffer allocated above (otherwise it is freed |
||
764 | * later) |
||
765 | */ |
||
766 | ACPI_FREE(buffer.pointer); |
||
767 | status = AE_NO_MEMORY; |
||
768 | goto cleanup; |
||
769 | } |
||
770 | |||
771 | args[0]->buffer.length = (u32) buffer.length; |
||
772 | args[0]->buffer.pointer = buffer.pointer; |
||
773 | args[0]->common.flags = AOPOBJ_DATA_VALID; |
||
774 | args[1] = NULL; |
||
775 | |||
776 | /* Execute the method, no return value is expected */ |
||
777 | |||
778 | status = acpi_ns_evaluate(info); |
||
779 | |||
780 | /* Clean up and return the status from acpi_ns_evaluate */ |
||
781 | |||
782 | acpi_ut_remove_reference(args[0]); |
||
783 | |||
784 | cleanup: |
||
785 | ACPI_FREE(info); |
||
786 | return_ACPI_STATUS(status); |
||
787 | }>><>> |