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Rev | Author | Line No. | Line |
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6595 | serge | 1 | /****************************************************************************** |
2 | * |
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3 | * Module Name: dswload - Dispatcher first pass namespace load callbacks |
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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 "acparser.h" |
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47 | #include "amlcode.h" |
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48 | #include "acdispat.h" |
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49 | #include "acinterp.h" |
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50 | #include "acnamesp.h" |
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51 | |||
52 | #ifdef ACPI_ASL_COMPILER |
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53 | #include "acdisasm.h" |
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54 | #endif |
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55 | |||
56 | #define _COMPONENT ACPI_DISPATCHER |
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57 | ACPI_MODULE_NAME("dswload") |
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58 | |||
59 | /******************************************************************************* |
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60 | * |
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61 | * FUNCTION: acpi_ds_init_callbacks |
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62 | * |
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63 | * PARAMETERS: walk_state - Current state of the parse tree walk |
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64 | * pass_number - 1, 2, or 3 |
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65 | * |
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66 | * RETURN: Status |
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67 | * |
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68 | * DESCRIPTION: Init walk state callbacks |
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69 | * |
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70 | ******************************************************************************/ |
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71 | acpi_status |
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72 | acpi_ds_init_callbacks(struct acpi_walk_state *walk_state, u32 pass_number) |
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73 | { |
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74 | |||
75 | switch (pass_number) { |
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76 | case 0: |
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77 | |||
78 | /* Parse only - caller will setup callbacks */ |
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79 | |||
80 | walk_state->parse_flags = ACPI_PARSE_LOAD_PASS1 | |
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81 | ACPI_PARSE_DELETE_TREE | ACPI_PARSE_DISASSEMBLE; |
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82 | walk_state->descending_callback = NULL; |
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83 | walk_state->ascending_callback = NULL; |
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84 | break; |
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85 | |||
86 | case 1: |
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87 | |||
88 | /* Load pass 1 */ |
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89 | |||
90 | walk_state->parse_flags = ACPI_PARSE_LOAD_PASS1 | |
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91 | ACPI_PARSE_DELETE_TREE; |
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92 | walk_state->descending_callback = acpi_ds_load1_begin_op; |
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93 | walk_state->ascending_callback = acpi_ds_load1_end_op; |
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94 | break; |
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95 | |||
96 | case 2: |
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97 | |||
98 | /* Load pass 2 */ |
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99 | |||
100 | walk_state->parse_flags = ACPI_PARSE_LOAD_PASS1 | |
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101 | ACPI_PARSE_DELETE_TREE; |
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102 | walk_state->descending_callback = acpi_ds_load2_begin_op; |
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103 | walk_state->ascending_callback = acpi_ds_load2_end_op; |
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104 | break; |
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105 | |||
106 | case 3: |
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107 | |||
108 | /* Execution pass */ |
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109 | |||
110 | #ifndef ACPI_NO_METHOD_EXECUTION |
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111 | walk_state->parse_flags |= ACPI_PARSE_EXECUTE | |
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112 | ACPI_PARSE_DELETE_TREE; |
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113 | walk_state->descending_callback = acpi_ds_exec_begin_op; |
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114 | walk_state->ascending_callback = acpi_ds_exec_end_op; |
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115 | #endif |
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116 | break; |
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117 | |||
118 | default: |
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119 | |||
120 | return (AE_BAD_PARAMETER); |
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121 | } |
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122 | |||
123 | return (AE_OK); |
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124 | } |
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125 | |||
126 | /******************************************************************************* |
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127 | * |
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128 | * FUNCTION: acpi_ds_load1_begin_op |
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129 | * |
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130 | * PARAMETERS: walk_state - Current state of the parse tree walk |
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131 | * out_op - Where to return op if a new one is created |
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132 | * |
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133 | * RETURN: Status |
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134 | * |
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135 | * DESCRIPTION: Descending callback used during the loading of ACPI tables. |
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136 | * |
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137 | ******************************************************************************/ |
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138 | |||
139 | acpi_status |
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140 | acpi_ds_load1_begin_op(struct acpi_walk_state * walk_state, |
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141 | union acpi_parse_object ** out_op) |
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142 | { |
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143 | union acpi_parse_object *op; |
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144 | struct acpi_namespace_node *node; |
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145 | acpi_status status; |
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146 | acpi_object_type object_type; |
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147 | char *path; |
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148 | u32 flags; |
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149 | |||
150 | ACPI_FUNCTION_TRACE(ds_load1_begin_op); |
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151 | |||
152 | op = walk_state->op; |
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153 | ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, "Op=%p State=%p\n", op, |
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154 | walk_state)); |
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155 | |||
156 | /* We are only interested in opcodes that have an associated name */ |
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157 | |||
158 | if (op) { |
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159 | if (!(walk_state->op_info->flags & AML_NAMED)) { |
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160 | *out_op = op; |
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161 | return_ACPI_STATUS(AE_OK); |
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162 | } |
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163 | |||
164 | /* Check if this object has already been installed in the namespace */ |
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165 | |||
166 | if (op->common.node) { |
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167 | *out_op = op; |
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168 | return_ACPI_STATUS(AE_OK); |
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169 | } |
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170 | } |
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171 | |||
172 | path = acpi_ps_get_next_namestring(&walk_state->parser_state); |
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173 | |||
174 | /* Map the raw opcode into an internal object type */ |
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175 | |||
176 | object_type = walk_state->op_info->object_type; |
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177 | |||
178 | ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, |
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179 | "State=%p Op=%p [%s]\n", walk_state, op, |
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180 | acpi_ut_get_type_name(object_type))); |
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181 | |||
182 | switch (walk_state->opcode) { |
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183 | case AML_SCOPE_OP: |
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184 | /* |
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185 | * The target name of the Scope() operator must exist at this point so |
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186 | * that we can actually open the scope to enter new names underneath it. |
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187 | * Allow search-to-root for single namesegs. |
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188 | */ |
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189 | status = |
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190 | acpi_ns_lookup(walk_state->scope_info, path, object_type, |
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191 | ACPI_IMODE_EXECUTE, ACPI_NS_SEARCH_PARENT, |
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192 | walk_state, &(node)); |
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193 | #ifdef ACPI_ASL_COMPILER |
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194 | if (status == AE_NOT_FOUND) { |
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195 | /* |
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196 | * Table disassembly: |
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197 | * Target of Scope() not found. Generate an External for it, and |
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198 | * insert the name into the namespace. |
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199 | */ |
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200 | acpi_dm_add_op_to_external_list(op, path, |
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201 | ACPI_TYPE_DEVICE, 0, 0); |
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202 | status = |
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203 | acpi_ns_lookup(walk_state->scope_info, path, |
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204 | object_type, ACPI_IMODE_LOAD_PASS1, |
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205 | ACPI_NS_SEARCH_PARENT, walk_state, |
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206 | &node); |
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207 | } |
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208 | #endif |
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209 | if (ACPI_FAILURE(status)) { |
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210 | ACPI_ERROR_NAMESPACE(path, status); |
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211 | return_ACPI_STATUS(status); |
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212 | } |
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213 | |||
214 | /* |
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215 | * Check to make sure that the target is |
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216 | * one of the opcodes that actually opens a scope |
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217 | */ |
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218 | switch (node->type) { |
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219 | case ACPI_TYPE_ANY: |
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220 | case ACPI_TYPE_LOCAL_SCOPE: /* Scope */ |
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221 | case ACPI_TYPE_DEVICE: |
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222 | case ACPI_TYPE_POWER: |
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223 | case ACPI_TYPE_PROCESSOR: |
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224 | case ACPI_TYPE_THERMAL: |
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225 | |||
226 | /* These are acceptable types */ |
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227 | break; |
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228 | |||
229 | case ACPI_TYPE_INTEGER: |
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230 | case ACPI_TYPE_STRING: |
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231 | case ACPI_TYPE_BUFFER: |
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232 | /* |
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233 | * These types we will allow, but we will change the type. |
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234 | * This enables some existing code of the form: |
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235 | * |
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236 | * Name (DEB, 0) |
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237 | * Scope (DEB) { ... } |
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238 | * |
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239 | * Note: silently change the type here. On the second pass, |
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240 | * we will report a warning |
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241 | */ |
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242 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
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243 | "Type override - [%4.4s] had invalid type (%s) " |
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244 | "for Scope operator, changed to type ANY\n", |
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245 | acpi_ut_get_node_name(node), |
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246 | acpi_ut_get_type_name(node->type))); |
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247 | |||
248 | node->type = ACPI_TYPE_ANY; |
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249 | walk_state->scope_info->common.value = ACPI_TYPE_ANY; |
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250 | break; |
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251 | |||
252 | case ACPI_TYPE_METHOD: |
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253 | /* |
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254 | * Allow scope change to root during execution of module-level |
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255 | * code. Root is typed METHOD during this time. |
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256 | */ |
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257 | if ((node == acpi_gbl_root_node) && |
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258 | (walk_state-> |
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259 | parse_flags & ACPI_PARSE_MODULE_LEVEL)) { |
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260 | break; |
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261 | } |
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262 | |||
263 | /*lint -fallthrough */ |
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264 | |||
265 | default: |
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266 | |||
267 | /* All other types are an error */ |
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268 | |||
269 | ACPI_ERROR((AE_INFO, |
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270 | "Invalid type (%s) for target of " |
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271 | "Scope operator [%4.4s] (Cannot override)", |
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272 | acpi_ut_get_type_name(node->type), |
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273 | acpi_ut_get_node_name(node))); |
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274 | |||
275 | return_ACPI_STATUS(AE_AML_OPERAND_TYPE); |
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276 | } |
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277 | break; |
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278 | |||
279 | default: |
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280 | /* |
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281 | * For all other named opcodes, we will enter the name into |
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282 | * the namespace. |
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283 | * |
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284 | * Setup the search flags. |
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285 | * Since we are entering a name into the namespace, we do not want to |
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286 | * enable the search-to-root upsearch. |
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287 | * |
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288 | * There are only two conditions where it is acceptable that the name |
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289 | * already exists: |
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290 | * 1) the Scope() operator can reopen a scoping object that was |
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291 | * previously defined (Scope, Method, Device, etc.) |
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292 | * 2) Whenever we are parsing a deferred opcode (op_region, Buffer, |
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293 | * buffer_field, or Package), the name of the object is already |
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294 | * in the namespace. |
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295 | */ |
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296 | if (walk_state->deferred_node) { |
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297 | |||
298 | /* This name is already in the namespace, get the node */ |
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299 | |||
300 | node = walk_state->deferred_node; |
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301 | status = AE_OK; |
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302 | break; |
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303 | } |
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304 | |||
305 | /* |
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306 | * If we are executing a method, do not create any namespace objects |
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307 | * during the load phase, only during execution. |
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308 | */ |
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309 | if (walk_state->method_node) { |
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310 | node = NULL; |
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311 | status = AE_OK; |
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312 | break; |
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313 | } |
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314 | |||
315 | flags = ACPI_NS_NO_UPSEARCH; |
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316 | if ((walk_state->opcode != AML_SCOPE_OP) && |
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317 | (!(walk_state->parse_flags & ACPI_PARSE_DEFERRED_OP))) { |
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318 | if (walk_state->namespace_override) { |
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319 | flags |= ACPI_NS_OVERRIDE_IF_FOUND; |
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320 | ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, |
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321 | "[%s] Override allowed\n", |
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322 | acpi_ut_get_type_name |
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323 | (object_type))); |
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324 | } else { |
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325 | flags |= ACPI_NS_ERROR_IF_FOUND; |
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326 | ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, |
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327 | "[%s] Cannot already exist\n", |
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328 | acpi_ut_get_type_name |
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329 | (object_type))); |
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330 | } |
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331 | } else { |
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332 | ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, |
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333 | "[%s] Both Find or Create allowed\n", |
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334 | acpi_ut_get_type_name(object_type))); |
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335 | } |
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336 | |||
337 | /* |
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338 | * Enter the named type into the internal namespace. We enter the name |
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339 | * as we go downward in the parse tree. Any necessary subobjects that |
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340 | * involve arguments to the opcode must be created as we go back up the |
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341 | * parse tree later. |
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342 | */ |
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343 | status = |
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344 | acpi_ns_lookup(walk_state->scope_info, path, object_type, |
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345 | ACPI_IMODE_LOAD_PASS1, flags, walk_state, |
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346 | &node); |
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347 | if (ACPI_FAILURE(status)) { |
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348 | if (status == AE_ALREADY_EXISTS) { |
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349 | |||
350 | /* The name already exists in this scope */ |
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351 | |||
352 | if (node->flags & ANOBJ_IS_EXTERNAL) { |
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353 | /* |
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354 | * Allow one create on an object or segment that was |
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355 | * previously declared External |
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356 | */ |
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357 | node->flags &= ~ANOBJ_IS_EXTERNAL; |
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358 | node->type = (u8) object_type; |
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359 | |||
360 | /* Just retyped a node, probably will need to open a scope */ |
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361 | |||
362 | if (acpi_ns_opens_scope(object_type)) { |
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363 | status = |
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364 | acpi_ds_scope_stack_push |
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365 | (node, object_type, |
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366 | walk_state); |
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367 | if (ACPI_FAILURE(status)) { |
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368 | return_ACPI_STATUS |
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369 | (status); |
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370 | } |
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371 | } |
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372 | |||
373 | status = AE_OK; |
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374 | } |
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375 | } |
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376 | |||
377 | if (ACPI_FAILURE(status)) { |
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378 | ACPI_ERROR_NAMESPACE(path, status); |
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379 | return_ACPI_STATUS(status); |
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380 | } |
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381 | } |
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382 | break; |
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383 | } |
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384 | |||
385 | /* Common exit */ |
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386 | |||
387 | if (!op) { |
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388 | |||
389 | /* Create a new op */ |
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390 | |||
391 | op = acpi_ps_alloc_op(walk_state->opcode, walk_state->aml); |
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392 | if (!op) { |
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393 | return_ACPI_STATUS(AE_NO_MEMORY); |
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394 | } |
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395 | } |
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396 | |||
397 | /* Initialize the op */ |
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398 | |||
399 | #if (defined (ACPI_NO_METHOD_EXECUTION) || defined (ACPI_CONSTANT_EVAL_ONLY)) |
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400 | op->named.path = ACPI_CAST_PTR(u8, path); |
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401 | #endif |
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402 | |||
403 | if (node) { |
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404 | /* |
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405 | * Put the Node in the "op" object that the parser uses, so we |
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406 | * can get it again quickly when this scope is closed |
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407 | */ |
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408 | op->common.node = node; |
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409 | op->named.name = node->name.integer; |
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410 | } |
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411 | |||
412 | acpi_ps_append_arg(acpi_ps_get_parent_scope(&walk_state->parser_state), |
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413 | op); |
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414 | *out_op = op; |
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415 | return_ACPI_STATUS(status); |
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416 | } |
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417 | |||
418 | /******************************************************************************* |
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419 | * |
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420 | * FUNCTION: acpi_ds_load1_end_op |
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421 | * |
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422 | * PARAMETERS: walk_state - Current state of the parse tree walk |
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423 | * |
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424 | * RETURN: Status |
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425 | * |
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426 | * DESCRIPTION: Ascending callback used during the loading of the namespace, |
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427 | * both control methods and everything else. |
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428 | * |
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429 | ******************************************************************************/ |
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430 | |||
431 | acpi_status acpi_ds_load1_end_op(struct acpi_walk_state *walk_state) |
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432 | { |
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433 | union acpi_parse_object *op; |
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434 | acpi_object_type object_type; |
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435 | acpi_status status = AE_OK; |
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436 | |||
437 | ACPI_FUNCTION_TRACE(ds_load1_end_op); |
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438 | |||
439 | op = walk_state->op; |
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440 | ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, "Op=%p State=%p\n", op, |
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441 | walk_state)); |
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442 | |||
443 | /* We are only interested in opcodes that have an associated name */ |
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444 | |||
445 | if (!(walk_state->op_info->flags & (AML_NAMED | AML_FIELD))) { |
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446 | return_ACPI_STATUS(AE_OK); |
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447 | } |
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448 | |||
449 | /* Get the object type to determine if we should pop the scope */ |
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450 | |||
451 | object_type = walk_state->op_info->object_type; |
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452 | |||
453 | #ifndef ACPI_NO_METHOD_EXECUTION |
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454 | if (walk_state->op_info->flags & AML_FIELD) { |
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455 | /* |
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456 | * If we are executing a method, do not create any namespace objects |
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457 | * during the load phase, only during execution. |
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458 | */ |
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459 | if (!walk_state->method_node) { |
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460 | if (walk_state->opcode == AML_FIELD_OP || |
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461 | walk_state->opcode == AML_BANK_FIELD_OP || |
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462 | walk_state->opcode == AML_INDEX_FIELD_OP) { |
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463 | status = |
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464 | acpi_ds_init_field_objects(op, walk_state); |
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465 | } |
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466 | } |
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467 | return_ACPI_STATUS(status); |
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468 | } |
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469 | |||
470 | /* |
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471 | * If we are executing a method, do not create any namespace objects |
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472 | * during the load phase, only during execution. |
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473 | */ |
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474 | if (!walk_state->method_node) { |
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475 | if (op->common.aml_opcode == AML_REGION_OP) { |
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476 | status = |
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477 | acpi_ex_create_region(op->named.data, |
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478 | op->named.length, |
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479 | (acpi_adr_space_type) ((op-> |
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480 | common. |
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481 | value. |
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482 | arg)-> |
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483 | common. |
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484 | value. |
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485 | integer), |
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486 | walk_state); |
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487 | if (ACPI_FAILURE(status)) { |
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488 | return_ACPI_STATUS(status); |
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489 | } |
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490 | } else if (op->common.aml_opcode == AML_DATA_REGION_OP) { |
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491 | status = |
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492 | acpi_ex_create_region(op->named.data, |
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493 | op->named.length, |
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494 | ACPI_ADR_SPACE_DATA_TABLE, |
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495 | walk_state); |
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496 | if (ACPI_FAILURE(status)) { |
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497 | return_ACPI_STATUS(status); |
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498 | } |
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499 | } |
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500 | } |
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501 | #endif |
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502 | |||
503 | if (op->common.aml_opcode == AML_NAME_OP) { |
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504 | |||
505 | /* For Name opcode, get the object type from the argument */ |
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506 | |||
507 | if (op->common.value.arg) { |
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508 | object_type = (acpi_ps_get_opcode_info((op->common. |
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509 | value.arg)-> |
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510 | common. |
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511 | aml_opcode))-> |
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512 | object_type; |
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513 | |||
514 | /* Set node type if we have a namespace node */ |
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515 | |||
516 | if (op->common.node) { |
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517 | op->common.node->type = (u8) object_type; |
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518 | } |
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519 | } |
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520 | } |
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521 | |||
522 | /* |
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523 | * If we are executing a method, do not create any namespace objects |
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524 | * during the load phase, only during execution. |
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525 | */ |
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526 | if (!walk_state->method_node) { |
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527 | if (op->common.aml_opcode == AML_METHOD_OP) { |
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528 | /* |
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529 | * method_op pkg_length name_string method_flags term_list |
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530 | * |
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531 | * Note: We must create the method node/object pair as soon as we |
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532 | * see the method declaration. This allows later pass1 parsing |
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533 | * of invocations of the method (need to know the number of |
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534 | * arguments.) |
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535 | */ |
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536 | ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, |
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537 | "LOADING-Method: State=%p Op=%p NamedObj=%p\n", |
||
538 | walk_state, op, op->named.node)); |
||
539 | |||
540 | if (!acpi_ns_get_attached_object(op->named.node)) { |
||
541 | walk_state->operands[0] = |
||
542 | ACPI_CAST_PTR(void, op->named.node); |
||
543 | walk_state->num_operands = 1; |
||
544 | |||
545 | status = |
||
546 | acpi_ds_create_operands(walk_state, |
||
547 | op->common.value. |
||
548 | arg); |
||
549 | if (ACPI_SUCCESS(status)) { |
||
550 | status = |
||
551 | acpi_ex_create_method(op->named. |
||
552 | data, |
||
553 | op->named. |
||
554 | length, |
||
555 | walk_state); |
||
556 | } |
||
557 | |||
558 | walk_state->operands[0] = NULL; |
||
559 | walk_state->num_operands = 0; |
||
560 | |||
561 | if (ACPI_FAILURE(status)) { |
||
562 | return_ACPI_STATUS(status); |
||
563 | } |
||
564 | } |
||
565 | } |
||
566 | } |
||
567 | |||
568 | /* Pop the scope stack (only if loading a table) */ |
||
569 | |||
570 | if (!walk_state->method_node && acpi_ns_opens_scope(object_type)) { |
||
571 | ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, |
||
572 | "(%s): Popping scope for Op %p\n", |
||
573 | acpi_ut_get_type_name(object_type), op)); |
||
574 | |||
575 | status = acpi_ds_scope_stack_pop(walk_state); |
||
576 | } |
||
577 | |||
578 | return_ACPI_STATUS(status); |
||
579 | } |