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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 | /****************************************************************************** * * Module Name: amprep - ACPI AML (p-code) execution - field prep utilities * $Revision: 73 $ * *****************************************************************************/ /* * Copyright (C) 2000, 2001 R. Byron Moore * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #include "acpi.h" #include "acinterp.h" #include "amlcode.h" #include "acnamesp.h" #include "acparser.h" #define _COMPONENT INTERPRETER MODULE_NAME ("amprep") /******************************************************************************* * * FUNCTION: Acpi_aml_decode_field_access_type * * PARAMETERS: Access - Encoded field access bits * * RETURN: Field granularity (8, 16, or 32) * * DESCRIPTION: Decode the Access_type bits of a field definition. * ******************************************************************************/ static u32 acpi_aml_decode_field_access_type ( u32 access, u16 length) { switch (access) { case ACCESS_ANY_ACC: if (length <= 8) { return (8); } else if (length <= 16) { return (16); } else if (length <= 32) { return (32); } else { return (8); } break; case ACCESS_BYTE_ACC: return (8); break; case ACCESS_WORD_ACC: return (16); break; case ACCESS_DWORD_ACC: return (32); break; default: /* Invalid field access type */ return (0); } } /******************************************************************************* * * FUNCTION: Acpi_aml_prep_common_field_objec * * PARAMETERS: Obj_desc - The field object * Field_flags - Access, Lock_rule, or Update_rule. * The format of a Field_flag is described * in the ACPI specification * Field_position - Field position * Field_length - Field length * * RETURN: Status * * DESCRIPTION: Initialize the areas of the field object that are common * to the various types of fields. * ******************************************************************************/ static ACPI_STATUS acpi_aml_prep_common_field_object ( ACPI_OPERAND_OBJECT *obj_desc, u8 field_flags, u8 field_attribute, u32 field_position, u32 field_length) { u32 granularity; /* * Note: the structure being initialized is the * ACPI_COMMON_FIELD_INFO; Therefore, we can just use the Field union to * access this common area. No structure fields outside of the common area * are initialized by this procedure. */ /* Decode the Field_flags */ obj_desc->field.access = (u8) ((field_flags & ACCESS_TYPE_MASK) >> ACCESS_TYPE_SHIFT); obj_desc->field.lock_rule = (u8) ((field_flags & LOCK_RULE_MASK) >> LOCK_RULE_SHIFT); obj_desc->field.update_rule = (u8) ((field_flags & UPDATE_RULE_MASK) >> UPDATE_RULE_SHIFT); /* Other misc fields */ obj_desc->field.length = (u16) field_length; obj_desc->field.access_attribute = field_attribute; /* Decode the access type so we can compute offsets */ granularity = acpi_aml_decode_field_access_type (obj_desc->field.access, obj_desc->field.length); if (!granularity) { return (AE_AML_OPERAND_VALUE); } /* Access granularity based fields */ obj_desc->field.granularity = (u8) granularity; obj_desc->field.bit_offset = (u8) (field_position % granularity); obj_desc->field.offset = (u32) field_position / granularity; return (AE_OK); } /******************************************************************************* * * FUNCTION: Acpi_aml_prep_def_field_value * * PARAMETERS: Node - Owning Node * Region - Region in which field is being defined * Field_flags - Access, Lock_rule, or Update_rule. * The format of a Field_flag is described * in the ACPI specification * Field_position - Field position * Field_length - Field length * * RETURN: Status * * DESCRIPTION: Construct an ACPI_OPERAND_OBJECT of type Def_field and * connect it to the parent Node. * ******************************************************************************/ ACPI_STATUS acpi_aml_prep_def_field_value ( ACPI_NAMESPACE_NODE *node, ACPI_HANDLE region, u8 field_flags, u8 field_attribute, u32 field_position, u32 field_length) { ACPI_OPERAND_OBJECT *obj_desc; u32 type; ACPI_STATUS status; /* Parameter validation */ if (!region) { return (AE_AML_NO_OPERAND); } type = acpi_ns_get_type (region); if (type != ACPI_TYPE_REGION) { return (AE_AML_OPERAND_TYPE); } /* Allocate a new object */ obj_desc = acpi_cm_create_internal_object (INTERNAL_TYPE_DEF_FIELD); if (!obj_desc) { return (AE_NO_MEMORY); } /* Obj_desc and Region valid */ /* Initialize areas of the object that are common to all fields */ status = acpi_aml_prep_common_field_object (obj_desc, field_flags, field_attribute, field_position, field_length); if (ACPI_FAILURE (status)) { return (status); } /* Initialize areas of the object that are specific to this field type */ obj_desc->field.container = acpi_ns_get_attached_object (region); /* An additional reference for the container */ acpi_cm_add_reference (obj_desc->field.container); /* Debug info */ /* * Store the constructed descriptor (Obj_desc) into the Named_obj whose * handle is on TOS, preserving the current type of that Named_obj. */ status = acpi_ns_attach_object ((ACPI_HANDLE) node, obj_desc, (u8) acpi_ns_get_type ((ACPI_HANDLE) node)); return (status); } /******************************************************************************* * * FUNCTION: Acpi_aml_prep_bank_field_value * * PARAMETERS: Node - Owning Node * Region - Region in which field is being defined * Bank_reg - Bank selection register * Bank_val - Value to store in selection register * Field_flags - Access, Lock_rule, or Update_rule * Field_position - Field position * Field_length - Field length * * RETURN: Status * * DESCRIPTION: Construct an ACPI_OPERAND_OBJECT of type Bank_field and * connect it to the parent Node. * ******************************************************************************/ ACPI_STATUS acpi_aml_prep_bank_field_value ( ACPI_NAMESPACE_NODE *node, ACPI_HANDLE region, ACPI_HANDLE bank_reg, u32 bank_val, u8 field_flags, u8 field_attribute, u32 field_position, u32 field_length) { ACPI_OPERAND_OBJECT *obj_desc; u32 type; ACPI_STATUS status; /* Parameter validation */ if (!region) { return (AE_AML_NO_OPERAND); } type = acpi_ns_get_type (region); if (type != ACPI_TYPE_REGION) { return (AE_AML_OPERAND_TYPE); } /* Allocate a new object */ obj_desc = acpi_cm_create_internal_object (INTERNAL_TYPE_BANK_FIELD); if (!obj_desc) { return (AE_NO_MEMORY); } /* Obj_desc and Region valid */ /* Initialize areas of the object that are common to all fields */ status = acpi_aml_prep_common_field_object (obj_desc, field_flags, field_attribute, field_position, field_length); if (ACPI_FAILURE (status)) { return (status); } /* Initialize areas of the object that are specific to this field type */ obj_desc->bank_field.value = bank_val; obj_desc->bank_field.container = acpi_ns_get_attached_object (region); obj_desc->bank_field.bank_select = acpi_ns_get_attached_object (bank_reg); /* An additional reference for the container and bank select */ /* TBD: [Restructure] is "Bank_select" ever a real internal object?? */ acpi_cm_add_reference (obj_desc->bank_field.container); acpi_cm_add_reference (obj_desc->bank_field.bank_select); /* Debug info */ /* * Store the constructed descriptor (Obj_desc) into the Named_obj whose * handle is on TOS, preserving the current type of that Named_obj. */ status = acpi_ns_attach_object ((ACPI_HANDLE) node, obj_desc, (u8) acpi_ns_get_type ((ACPI_HANDLE) node)); return (status); } /******************************************************************************* * * FUNCTION: Acpi_aml_prep_index_field_value * * PARAMETERS: Node - Owning Node * Index_reg - Index register * Data_reg - Data register * Field_flags - Access, Lock_rule, or Update_rule * Field_position - Field position * Field_length - Field length * * RETURN: Status * * DESCRIPTION: Construct an ACPI_OPERAND_OBJECT of type Index_field and * connect it to the parent Node. * ******************************************************************************/ ACPI_STATUS acpi_aml_prep_index_field_value ( ACPI_NAMESPACE_NODE *node, ACPI_HANDLE index_reg, ACPI_HANDLE data_reg, u8 field_flags, u8 field_attribute, u32 field_position, u32 field_length) { ACPI_OPERAND_OBJECT *obj_desc; ACPI_STATUS status; /* Parameter validation */ if (!index_reg || !data_reg) { return (AE_AML_NO_OPERAND); } /* Allocate a new object descriptor */ obj_desc = acpi_cm_create_internal_object (INTERNAL_TYPE_INDEX_FIELD); if (!obj_desc) { return (AE_NO_MEMORY); } /* Initialize areas of the object that are common to all fields */ status = acpi_aml_prep_common_field_object (obj_desc, field_flags, field_attribute, field_position, field_length); if (ACPI_FAILURE (status)) { return (status); } /* Initialize areas of the object that are specific to this field type */ obj_desc->index_field.value = (u32) (field_position / obj_desc->field.granularity); obj_desc->index_field.index = index_reg; obj_desc->index_field.data = data_reg; /* Debug info */ /* * Store the constructed descriptor (Obj_desc) into the Named_obj whose * handle is on TOS, preserving the current type of that Named_obj. */ status = acpi_ns_attach_object ((ACPI_HANDLE) node, obj_desc, (u8) acpi_ns_get_type ((ACPI_HANDLE) node)); return (status); } |